ICE3AR2280VJZXKLA1 - Infineon Technologies

Data Sheet

V2.1 2013-10-22

CoolSET™ F3R80

ICE3AR2280VJZ

Off-Line SMPS Current Mode Controller with

integrated 800V CoolMOS™ and Startup cell

(input OVP & frequency jitter) in DIP-7

Power Management & Multimarket

Edition 2013-10-22

Published by Infineon Technologies AG,

81726 Munich, Germany.

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CoolSET™ F3R80

ICE3AR2280VJZ

Data Sheet 3 V2.1, 2013-10-22

Trademarks of Infineon Technologies AG

AURIX™, C166™, CanPAK™, CIPOS™, CIPURSE™, EconoPACK™, CoolMOS™, CoolSET™,

CORECONTROL™, CROSSAVE™, DAVE™, DI-POL™, EasyPIM™, EconoBRIDGE™, EconoDUAL™,

EconoPIM™, EconoPACK™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™, I²RF™,

ISOFACE™, IsoPACK™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OptiMOS™, ORIGA™,

POWERCODE™; PRIMARION™, PrimePACK™, PrimeSTACK™, PRO-SIL™, PROFET™, RASIC™,

ReverSave™, SatRIC™, SIEGET™, SINDRION™, SIPMOS™, SmartLEWIS™, SOLID FLASH™,

TEMPFET™, thinQ!™, TRENCHSTOP™, TriCore™.

Other Trademarks

Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™, KEIL™,

PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed by

AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT Forum.

COLOSSUS™, FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.). EPCOS™

of Epcos AG. FLEXGO™ of Microsoft Corporation. FlexRay™ is licensed by FlexRay Consortium.

HYPERTERMINAL™ of Hilgraeve Incorporated. IEC™ of Commission Electrotechnique Internationale. IrDA™

of Infrared Data Association Corporation. ISO™ of INTERNATIONAL ORGANIZATION FOR

STANDARDIZATION. MATLAB™ of MathWorks, Inc. MAXIM™ of Maxim Integrated Products, Inc.

MICROTEC™, NUCLEUS™ of Mentor Graphics Corporation. MIPI™ of MIPI Alliance, Inc. MIPS™ of MIPS

Technologies, Inc., USA. muRata™ of MURATA MANUFACTURING CO., MICROWAVE OFFICE™ (MWO) of

Applied Wave Research Inc., OmniVision™ of OmniVision Technologies, Inc. Openwave™ Openwave Systems

Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius Satellite Radio Inc.

SOLARIS™ of Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software

Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ of CEVA, Inc. TEKTRONIX™ of Tektronix Inc.

TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™

of Cadence Design Systems, Inc. VLYNQ™ of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™

of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited.

Last Trademarks Update 2011-11-11

CoolSET™ F3R80

ICE3AR2280VJZ

Data Sheet 4 V2.1, 2013-10-22

Revision History

Major changes since previous revision

Date

Version

Changed By

Change Description

22 Oct 2013

2.1

New datasheet format

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CoolSET™ F3R80

ICE3AR2280VJZ

Data Sheet 5 V2.1, 2013-10-22

Table of Contents

Revision History .............................................................................................................................................. 4

Table of Contents ............................................................................................................................................ 5

Off-Line SMPS Current Mode Controller with integrated 800V CoolMOS™ and Startup cell (input OVP &

frequency jitter) in DIP-7 ................................................................................................................. 7

1 Pin Configuration and Functionality ........................................................................................... 8

1.1 Pin Configuration with PG-DIP-7 .................................................................................................... 8

1.2 Pin Functionality ............................................................................................................................. 8

2 Representative Block Diagram .................................................................................................. 10

3 Functional Description............................................................................................................... 11

3.1 Introduction .................................................................................................................................. 11

3.2 Power Management ..................................................................................................................... 11

3.3 Improved Current Mode ............................................................................................................... 12

3.3.1 PWM-OP................................................................................................................................. 14

3.3.2 PWM-Comparator ................................................................................................................... 14

3.4 Startup Phase .............................................................................................................................. 14

3.5 PWM Section ............................................................................................................................... 17

3.5.1 Oscillator ................................................................................................................................. 17

3.5.2 PWM-Latch FF1 ...................................................................................................................... 17

3.5.3 Gate Driver ............................................................................................................................. 17

3.6 Current Limiting ............................................................................................................................ 18

3.6.1 Leading Edge Blanking ........................................................................................................... 19

3.6.2 Propagation Delay Compensation (patented)........................................................................... 19

3.7 Control Unit .................................................................................................................................. 20

3.7.1 Basic and Extendable Blanking Mode ...................................................................................... 20

3.7.2 Active Burst Mode (patented) .................................................................................................. 21

3.7.2.1 Selectable burst entry level ................................................................................................. 22

3.7.2.2 Entering Active Burst Mode ................................................................................................ 23

3.7.2.3 Working in Active Burst Mode ............................................................................................. 23

3.7.2.4 Leaving Active Burst Mode ................................................................................................. 23

3.7.3 Protection Modes .................................................................................................................... 24

3.7.3.1 Vcc OVP, OTP and Vcc under voltage ................................................................................ 25

3.7.3.2 Over load, open loop protection .......................................................................................... 26

3.7.4 Input OVP Mode...................................................................................................................... 27

3.7.5 Action sequence at BV pin ...................................................................................................... 28

4 Electrical Characteristics ........................................................................................................... 30

4.1 Absolute Maximum Ratings .......................................................................................................... 30

4.2 Operating Range .......................................................................................................................... 31

4.3 Characteristics ............................................................................................................................. 31

4.3.1 Supply Section ........................................................................................................................ 31

4.3.2 Internal Voltage Reference ...................................................................................................... 32

4.3.3 PWM Section .......................................................................................................................... 32

4.3.4 Soft Start time ......................................................................................................................... 32

4.3.5 Control Unit ............................................................................................................................. 33

4.3.6 Current Limiting ....................................................................................................................... 34

CoolSET™ F3R80

ICE3AR2280VJZ

Data Sheet 6 V2.1, 2013-10-22

4.3.7 CoolMOS™ Section ................................................................................................................ 34

5 Typical Controller Performance Characteristics ...................................................................... 35

6 CoolMOS™ Performance Characteristics ................................................................................. 36

7 Input Power Curve ..................................................................................................................... 38

8 Outline Dimension ..................................................................................................................... 39

9 Marking ....................................................................................................................................... 40

10 Schematic for recommended PCB layout ................................................................................. 41

CoolSET™ F3R80

ICE3AR2280VJZ

Data Sheet 7 V2.1, 2013-10-22

Off-Line SMPS Current Mode Controller with integrated 800V CoolMOS™

and Startup cell (input OVP & frequency jitter) in DIP-7

Product Highlights

 800V avalanche rugged CoolMOS™ with startup cell

 Active Burst Mode to reach the lowest Standby Power <100mW

 Selectable entry and exit burst mode level

 Adjustable blanking Window for high load jumps

 Frequency jitter and soft driving for low EMI

 Adjustable input OVP

 Auto Restart protection for over load, over temperature and over voltage

 Low Operating temperature down to -40°C

 Pb-free lead plating, halogen free mold compound, RoHS compliant

Features

 800V avalanche rugged CoolMOS™ with Startup Cell

 Active Burst Mode for lowest Standby Power

 Selectable entry and exit burst mode level

 100kHz internally fixed switching frequency with jittering feature

 Auto Restart Protection for Over load, Open Loop, VCC Under voltage & Over voltage and Over temperature

 Over temperature protection with 50°C hysteresis

 Built-in 10ms Soft Start

 Built-in 20ms and extendable blanking time for short duration peak power

 Propagation delay compensation for both maximum load and burst mode

 Adjustable input OVP

 Overall tolerance of Current Limiting < ±5%

 BiCMOS technology for low power consumption and wide VCC voltage range

 Soft gate drive with 50Ω turn on resistor

Description

The ICE3AR2280VJZ is a modified version of ICE3ARxx80JZ (CoolSET™-F3R 800V) in DIP-7 package. It adds in

the input OVP feature but removes the brownout feature and external protection enable feature. In summary, the

ICE3AR2280VJZ is a device running at 100kHz, implemented with input OVP feature, installed with 800V MOSFET

with startup cell and housed in DIP-7 package. It provides good voltage margin of MOSFET, lowest standby power,

selectable burst level, reduced output ripple during burst mode, robust protection with input OVP feature, accurate

maximum power control for both maximum power and burst power, low EMI with frequency jittering and soft gate

drive, built-in and flexible protections, etc.

Applications

 Adapter/Charger

 Blue Ray/DVD player, Set-top Box, Digital Photo Frame

 Auxiliary power supply for Server, PC, Printer, TV, Home theater/Audio System, White Goods, etc

CVCC

CBulk

Converter

DC Output

Snubber

Power Management

PWM Controller

Current Mode

85 ... 270 VAC

Typical Application

RSense

FBB

Control Unit

VCC

Startup Cell

Precise Low Tolerance Peak

Current Limitation

Drain

CoolSET®- F3R80

(Input OVP & Jitter)

CoolMOS®

GND

ROV2

ROV1 Active Burst Mode

Auto Restart Mode

Input OVP mode

Figure 1: Pin configuration PG-DIP-7(top view)

Type

Package

Marking

VDS

FOSC

RDSon1)

230VAC ±15%2)

85-265 VAC2)

ICE3AR2280VJZ

PG-DIP-7

3AR2280VJZ

800V

100kHz

2.26

43W

28W

1) typ @ T=25°C

2) Calculated maximum input power rating at Ta=50°C, Ti=125°C and without copper area as heat sink.

PG-DIP7

CoolSET™ F3R80

ICE3AR2280VJZ

Pin Configuration and Functionality

Data Sheet 8 V2.1, 2013-10-22

1 Pin Configuration and Functionality

1.1 Pin Configuration with PG-DIP-7

Symbol

Function

extended Blanking time & input OVP

FBB

Feedback & Burst entry/exit control

Current Sense/ 800V CoolMOS™ Source

n.c.

not connected

Drain

800V CoolMOS™ Drain

(no pin)

VCC

Controller Supply Voltage

GND

Controller Ground

GNDBV

FBB

VCC

n.c. Drain

Figure 2: Pin configuration PG-DIP-7(top view)

1.2 Pin Functionality

BV (extended Blanking time & input OVP)

The BV pin combines the functions of input OVP and extendable blanking time for over load protection. The input

OVP feature is to stop the switching pulse when the input line voltage is higher than the VOVP_ref after the resistor

divider (Refer to Figure 3). The extendable blanking time function is to extend the built-in 20 ms blanking time for

over load protection by adding an external capacitor to ground.

FBB (Feedback & Burst entry control)

The FBB pin combines the feedback function and the burst entry/exit control. The regulation information is

provided by the FBB pin to the internal Protection Unit and the internal PWM-Comparator to control the duty cycle.

The FBB-signal is the only control signal in case of light load at the Active Burst Mode. The burst entry/ exit control

provides an access to select the entry/exit burst mode level.

CS (Current Sense)

The Current Sense pin senses the voltage developed on the shunt resistor inserted in the source of the integrated

CoolMOS™. If CS reaches the internal threshold of the Current Limit Comparator, the Driver output is immediately

switched off. Furthermore the current information is provided for the PWM comparator to realize the Current Mode.

CoolSET™ F3R80

ICE3AR2280VJZ

Pin Configuration and Functionality

Data Sheet 9 V2.1, 2013-10-22

Drain (Drain of integrated CoolMOS™)

Pin Drain is the connection to the Drain of the integrated CoolMOS™.

VCC (Power Supply)

The VCC pin is the positive supply of the IC. The operating range is between 10.5V and 25V.

GND (Ground)

The GND pin is the ground of the controller.

CoolSET™ F3R80

ICE3AR2280VJZ

Representative Block Diagram

Data Sheet 10 V2.1, 2013-10-22

2 Representative Block Diagram

Figure 3: Representative Block Diagram

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 11 V2.1, 2013-10-22

3 Functional Description

All values which are used in the functional description are typical values. For calculating the worst cases the

min/max values which can be found in section 4 Electrical Characteristics have to be considered.

3.1 Introduction

ICE3AR2280VJZ input OVP and jitter 800V version is the modified version of the ICE3ARxx80JZ. It is particular

good for high voltage margin low power SMPS application such as white goods, auxiliary power supply for PC and

server. The major characteristics are that the IC is developed with 800V CoolMOS™ with start up cell, having

adjustable input OVP feature, running at 100kHz switching frequency and packed in DIP-7 package.

The familiar features are BiCMOS technology to reduce power consumption and increase the Vcc voltage range,

cycle by cycle current mode control, built-in 10ms soft start to reduce the stress of switching elements during start up,

built-in 20ms and extended blanking time for short period of peak power before entering protection, active burst mode

for lowest standby power and propagation delay compensation for close power limit between high line and low line,

frequency jittering for low EMI performance, the built-in auto-restart mode protections for open loop, over load, Vcc

OVP, Vcc under voltage, etc.

Besides, it also includes narrowing the feedback voltage swing from 0.5V to 0.3V during burst mode so that the

output voltage ripple can be reduced by 40%, reduction of the fast voltage fall time of the MOSFET by increasing

the soft turn-on time and addition of 50Ω turn-on resistor, faster start up time by optimizing the Vcc capacitor to

10uF and over temperature protection with 50°C hysteresis.

Furthermore, it includes adjustable input OVP to suppress the abnormal input stress to damage the device,

selectable entry and exit burst mode for smaller entry/exit power to burst mode or even no burst mode is possible and

the propagation delay compensation for burst mode so that the entry/exit burst mode power is close between high

line and low line.

In summary, the ICE3AR2280VJZ provides good voltage margin of MOSFET, lowest standby power, flexible

burst level, reduced output ripple during burst mode, robust for abnormal input stress with input OVP feature,

accurate power limit for both maximum power and burst power, low EMI with frequency jittering and soft gate

drive, built-in and flexible protections, etc. Therefore, ICE3AR2280VJZ is a complete solution for the low power

SMPS application typically for white goods.

3.2 Power Management

Internal Bias

Voltage

Reference

Power Management

5.0V

Undervoltage Lockout

17V

10.5V

Power-Down Reset

Active Burst Mode

Auto Restart

Mode

Startup Cell

VCCDrain

CoolMOS®

Soft Start block

Figure 4: Power Management

The Undervoltage Lockout monitors the external supply voltage VVCC. When the SMPS is plugged to the main line the

internal Startup Cell is biased and starts to charge the external capacitor CVCC which is connected to the VCC pin. This

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 12 V2.1, 2013-10-22

VCC charge current is controlled to 0.9mA by the Startup Cell. When the VVCC exceeds the on-threshold VCCon=17V the

bias circuit are switched on. Then the Startup Cell is switched off by the Undervoltage Lockout and therefore no power

losses present due to the connection of the Startup Cell to the Drain voltage. To avoid uncontrolled ringing at switch-

on, a hysteresis start up voltage is implemented. The switch-off of the controller can only take place when VVCC falls

below 10.5V after normal operation was entered. The maximum current consumption before the controller is activated

is about 200µA.

When VVCC falls below the off-threshold VCCoff=10.5V, the bias circuit is switched off and the soft start counter is

reset. Thus it ensures that at every startup cycle the soft start starts at zero.

The internal bias circuit is switched off if Auto Restart Mode is entered. The current consumption is then

reduced to 320µA.

Once the malfunction condition is removed, this block will then turn back on. The recovery from Auto Restart Mode

does not require re-cycling the AC line.

When Active Burst Mode is entered, the internal Bias is switched off most of the time but the Voltage Reference is

kept alive in order to reduce the current consumption below 620µA.

3.3 Improved Current Mode

x3.25

PWM OP

Improved

Current Mode

0.6V

PWM-Latch

FBB

Driver

Soft-Start Comparator

Figure 5: Current Mode

Current Mode means the duty cycle is controlled by the slope of the primary current. This is done by comparing the

FBB signal with the amplified current sense signal.

FBB

Amplified Current Signal

ton

0.6V

Driver

Figure 6: Pulse Width Modulation

In case the amplified current sense signal exceeds the FBB signal the on-time ton of the driver is finished by

resetting the PWM-Latch (Figure 6).

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 13 V2.1, 2013-10-22

The primary current is sensed by the external series resistor RSense inserted in the source of the integrated

CoolMOS™. By means of Current Mode regulation, the secondary output voltage is insensitive to the line variations.

The current waveform slope will change with the line variation, which controls the duty cycle.

The external RSense allows an individual adjustment of the maximum source current of the integrated

CoolMOS™.

To improve the Current Mode during light load conditions the amplified current ramp of the PWM-OP is

superimposed on a voltage ramp, which is built by the switch T2, the voltage source V1 and a resistor R1 (see

Figure 7). Every time the oscillator shuts down for maximum duty cycle limitation the switch T2 is closed by VOSC.

When the oscillator triggers the Gate Driver, T2 is opened so that the voltage ramp can start.

PWM OP

0.6V

10k

Oscillator

T2R1

FBB

PWM-Latch

Gate Driver

Voltage Ramp

VOSC

Soft-Start Comparator

time delay

circuit (156ns)

X3.25

PWM Comparator

Figure 7: Improved Current Mode

In case of light load the amplified current ramp is too small to ensure a stable regulation. In that case the

Voltage Ramp is a well defined signal for the comparison with the FBB-signal. The duty cycle is then controlled

by the slope of the Voltage Ramp.

By means of the time delay circuit which is triggered by the inverted VOSC signal, the Gate Driver is switched-off until it

reaches approximately 156ns delay time (Figure 8). It allows the duty cycle to be reduced continuously till 0% by

decreasing VFBB below that threshold.

VOSC

0.6V

FBB

max.

Duty Cycle

Gate

Driver

Voltage

Ramp

156ns time delay

Figure 8: Light Load Conditions

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 14 V2.1, 2013-10-22

3.3.1 PWM-OP

The input of the PWM-OP is applied over the internal leading edge blanking to the external sense resistor RSense

connected to pin CS. RSense converts the source current into a sense voltage. The sense voltage is amplified with a

gain of 3.25 by PWM OP. The output of the PWM-OP is connected to the voltage source V1. The voltage ramp with

the superimposed amplified current signal is fed into the positive inputs of the PWM-Comparator C8 and the Soft-Start-

Comparator (Figure 9).

3.3.2 PWM-Comparator

The PWM-Comparator compares the sensed current signal of the integrated CoolMOS™ with the feedback

signal VFBB (Figure 9). VFBB is created by an external optocoupler or external transistor in combination with the

internal pull-up resistor RFB and provides the load information of the feedback circuitry. When the amplified

current signal of the integrated CoolMOS™ exceeds the signal VFBB the PWM-Comparator switches off the Gate

Driver.

X3.25

PWM OP

Improved

Current Mode

PWM Comparator

Soft-Start Comparator

0.6V

FBB

Optocoupler

RFB

PWM-Latch

Figure 9: PWM Controlling

3.4 Startup Phase

Soft-Start

Comparator

Soft Start

Gate Driver

0.6V

x3.25

PWM OP

Soft Start counter

Soft Start

Soft Start finish

SoftS

Figure 10: Soft Start

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 15 V2.1, 2013-10-22

In the Startup Phase, the IC provides a Soft Start period to control the primary current by means of a duty cycle

limitation. The Soft Start function is a built-in function and it is controlled by an internal counter.

Figure 11: Soft Start Phase

When the VVCC exceeds the on-threshold voltage, the IC starts the Soft Start mode (Figure 10).

The function is realized by an internal Soft Start resistor, a current sink and a counter. And the amplitude of the

current sink is controlled by the counter (Figure 12).

RSoftS

Soft Start

Counter

SoftS

32I

Figure 12: Soft Start Circuit

After the IC is switched on, the VSoftS voltage is controlled such that the voltage is increased step-wisely (32

steps) with the increase of the counts. The Soft Start counter would send a signal to the current sink control in

every 300µs such that the current sink decrease gradually and the duty ratio of the gate drive increases

gradually. The Soft Start will be finished in 10ms (tSoft-Start) after the IC is switched on. At the end of the Soft Start

period, the current sink is switched off.

Within the soft start period, the duty cycle is increasing from zero to maximum gradually (see Figure 13).

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 16 V2.1, 2013-10-22

VSOFTS32

VSoftS

Gate

Driver

tSoft-Start

Figure 13: Gate drive signal under Soft-Start Phase

In addition to Start-Up, Soft-Start is also activated at each restart attempt during Auto Restart.

VSoftS

VSOFTS32

4.5V

tSoft-Start

VOUT

VFB

VOUT

tStart-Up

Figure 14: Start Up Phase

The Start-Up time tStart-Up before the converter output voltage VOUT is settled, must be shorter than the Soft-Start Phase

tSoft-Start (Figure 14). By means of Soft-Start there is an effective minimization of current and voltage stresses on the

integrated CoolMOS™, the clamp circuit and the output rectifier and it helps to prevent saturation of the transformer

during Start-Up.

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 17 V2.1, 2013-10-22

3.5 PWM Section

Oscillator

Duty Cycle

max

Gate Driver

0.75

Clock

PWM Section

FF1

Soft Start

Comparator

PWM

Comparator

Current

Limiting

CoolMOS®

Gate

Frequency

Jitter

Soft Start

Block

Figure 15: PWM Section Block

3.5.1 Oscillator

The oscillator generates a fixed frequency of 100kHz with frequency jittering of ±4% (which is ±4KHz) at a

jittering period of 4ms.

A capacitor, a current source and current sink which determine the frequency are integrated. The charging and

discharging current of the implemented oscillator capacitor are internally trimmed in order to achieve a very accurate

switching frequency. The ratio of controlled charge to discharge current is adjusted to reach a maximum duty cycle

limitation of Dmax=0.75.

Once the Soft Start period is over and when the IC goes into normal operating mode, the switching frequency of the

clock is varied by the control signal from the Soft Start block. Then the switching frequency is varied in range of

100kHz ± 4KHz at period of 4ms.

3.5.2 PWM-Latch FF1

The output of the oscillator block provides continuous pulse to the PWM-Latch which turns on/off the integrated

CoolMOS™. After the PWM-Latch is set, it is reset by the PWM comparator, the Soft Start comparator or the

Current -Limit comparator. When it is in reset mode, the output of the driver is shut down immediately.

3.5.3 Gate Driver

VCC

PWM-Latch

CoolMOS®

Gate Driver

Gate

50

Figure 16: Gate Driver

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 18 V2.1, 2013-10-22

The driver-stage is optimized to minimize EMI and to provide high circuit efficiency. This is done by reducing the

switch on slope when exceeding the integrated CoolMOS™ threshold. This is achieved by a slope control of the

rising edge at the driver’s output (Figure 17) and adding a 50Ω gate turn on resistor (Figure 15). Thus the leading

switch on spike is minimized.

(internal)

VGate

4.6V

typ. t = 160ns

Figure 17: Gate Rising Slope

Furthermore the driver circuit is designed to eliminate cross conduction of the output stage.

During power up, when VCC is below the undervoltage lockout threshold VVCCoff, the output of the Gate Driver is set

to low in order to disable power transfer to the secondary side.

3.6 Current Limiting

Current Limiting

C10

C12

G10

Propagation-Delay

Compensation

Vcsth

PWM Latch

FF1

10k

D1 1pF

PWM-OP

Propagation-Delay

Compensation-Burst

VCSth_burst

LEB

220ns

LEB

180ns

VFB_burst

FBB

G13

Active Burst

Mode

Figure 18: Current Limiting Block

There is a cycle by cycle peak current limiting operation realized by the Current-Limit comparator C10. The source

current of the integrated CoolMOS™ is sensed via an external sense resistor RSense. By means of RSense the source

current is transformed to a sense voltage VSense which is fed into the pin CS. If the voltage VSense exceeds the internal

threshold voltage Vcsth, the comparator C10 immediately turns off the gate drive by resetting the PWM Latch FF1.

A Propagation Delay Compensation is added to support the immediate shut down of the integrated CoolMOS™

with very short propagation delay. Thus the influence of the AC input voltage on the maximum output power can

be reduced to minimal. This compensation applies to both the peak load and burst mode.

In order to prevent the current limit from distortions caused by leading edge spikes, a Leading Edge Blanking

(LEB) is integrated in the current sense path for the comparators C10, C12 and the PWM-OP.

The output of comparator C12 is activated by the Gate G10 if Active Burst Mode is entered. When it is activated,

the current limiting is reduced to Vcsth_burst. This voltage level determines the maximum power level in Active

Burst Mode.

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 19 V2.1, 2013-10-22

3.6.1 Leading Edge Blanking

VSense

Vcsth tLEB = 220ns/180ns

Figure 19: Leading Edge Blanking

Whenever the integrated CoolMOS™ is switched on, a leading edge spike is generated due to the primary-side

capacitances and reverse recovery time of the secondary-side rectifier. This spike can cause the gate drive to

switch off unintentionally. In order to avoid a premature termination of the switching pulse, this spike is blanked out

with a time constant of tLEB = 220ns for normal load and tLEB = 180ns for burst mode.

3.6.2 Propagation Delay Compensation (patented)

In case of overcurrent detection, there is always propagation delay to switch off the integrated CoolMOS™. An

overshoot of the peak current Ipeak is induced to the delay, which depends on the ratio of dI/ dt of the peak

current (Figure 20).

ISense

ILimit

tPropagation Delay

IOvershoot1

Ipeak1

Signal1Signal2

IOvershoot2

Ipeak2

Figure 20: Current Limiting

The overshoot of Signal2 is larger than of Signal1 due to the steeper rising waveform. This change in the slope

is depending on the AC input voltage. Propagation Delay Compensation is integrated to reduce the overshoot

due to dI/dt of the rising primary current. Thus the propagation delay time between exceeding the current sense

threshold Vcsth and the switching off of the integrated CoolMOS™ is compensated over temperature within a wide

input range. Current Limiting is then very accurate.

For example, Ipeak = 0.5A with RSense = 2. The current sense threshold is set to a static voltage level Vcsth=1V without

Propagation Delay Compensation. A current ramp of dI/dt = 0.4A/µs, or dVSense/dt = 0.8V/µs, and a propagation

delay time of tPropagation Delay =180ns leads to an Ipeak overshoot of 14.4%. With the propagation delay compensation,

the overshoot is only around 2% (Figure 21).

0,9

0,95

1,05

1,1

1,15

1,2

1,25

1,3

0 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8 2

with compensation without compensation

dVSense



Sense

Figure 21: Overcurrent Shutdown

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 20 V2.1, 2013-10-22

The Propagation Delay Compensation is realized by means of a dynamic threshold voltage Vcsth (Figure 22). In

case of a steeper slope the switch off of the driver is earlier to compensate the delay.

Vcsth

VOSC

Signal1 Signal2

VSense Propagation Delay

max. Duty Cycle

off time

Figure 22: Dynamic Voltage Threshold Vcsth

Similarly, the same concept of propagation delay compensation is also implemented in burst mode with reduced

level, Vcsth_burst (Figure 18). With this implementation, the entry and exit burst mode power can be very close

between low line and high line input voltage.

3.7 Control Unit

The Control Unit contains the functions for Active Burst Mode and Auto Restart Mode. The Active Burst Mode and

the Auto Restart Mode both have 20ms internal blanking time. For the over load Auto Restart Mode, the 20ms

blanking time can be further extended by adding an external capacitor at BV pin. With the blanking time, the IC

avoids entering into those two modes accidentally. That buffer time is very useful for the application which works in

short duration of peak power occasionally.

3.7.1 Basic and Extendable Blanking Mode

C11

4.5V

0.9V

4.5V

Control Unit

Auto

Restart

Mode

5.0V

FBB

CBK

Spike

Blanking

30us

Ichg_EB

Counter &

20ms

Blanking

Time

ROV2

500CT1

Figure 23: Basic and Extendable Blanking Mode

There are 2 kinds of Blanking mode; basic mode and the extendable mode. The basic mode is a built-in 20ms

blanking time while the extendable mode can extend this blanking time by connecting an external capacitor to the

BV pin. For the extendable mode, the gate G5 remains blocked even though the 20ms blanking time is reached.

After reaching the 20ms blanking time the counter is activated and the switch S1 is turned on to charge the voltage

of BV pin by the constant current source, Ichg_EB. When the voltage of BV pin hits 4.5V, which is sensed by

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 21 V2.1, 2013-10-22

comparator C11, the counter will increase the counter by 1. Then it switches off the switch S1 and turns on the

switch S2. The voltage at BV pin will be discharged through a 500Ω resistor. When the voltage drops to 0.9V which

is sensed by comparator C3, the switch S2 will be turned off and the switch S1 will be turned on. Then the constant

current Ichg_EB will charge the CBK capacitor again. When the voltage at BV hits 4.5V which is sensed by comparator

C11, the counter will increase the count to 2. The process repeats until it reaches total count of 256 (Figure 24).

Then the counter will release a high output signal. When the AND gate G5 detects both high signals at the inputs, it

will activate the 30µs spike blanking circuit and finally the auto-restart mode will be activated.

Figure 24: Waveform at extended blanking time

For example, if CBK=0.1µF, Ichg_EB=720µA, ROV2=15KΩ,

Ichg_EB’=Ichg_EB-(4.5V+0.9V)/(2*ROV2)=540 µA

Extended blanking time = 256*(CBK*(4.5V-0.9V)/ Ichg_EB’+ CBK*500*ln(4.5/0.9)) = 192ms

Total blanking time = 20ms+192 = 212ms

where Ichg_EB’=net charging current to CBK

Note: The above calculation does not include the effect of the input OVP circuit where there is extra biasing

current flowing from the input. That means the extended blanking time will be shortened with the line voltage

change if input OVP circuit is implemented.

3.7.2 Active Burst Mode (patented)

To increase the efficiency of the system at light load, the most effective way is to operate at burst mode. Starting from

CoolSET™™ F3, the IC has been employing the active burst mode and it can achieve the lowest standby power.

ICE3AR2280VJZ adopts the same concept with some more innovative improvements to the feature. It includes the

adjustable entry burst level, close power control between high line and low line and the smaller output ripple during

burst mode.

Most of the burst mode design in the market will provide a fixed entry burst mode level which is a ratio to the

maximum power of the design. ICE3AR2280VJZ provides a more flexible level which can be selected externally. The

provision also includes not entering burst mode.

Propagation delay is the major contributor for the power control variation for DCM flyback converter. It is proved to

be effective in the maximum power control. ICE3AR2280VJZ also apply the same concept in the burst mode.

Therefore, the entry and exit burst mode power is also finely controlled during burst mode.

The feedback control swing during burst mode will affect the output ripple voltage directly. ICE3AR2280VJZ

reduces the swing from 0.5V to 0.3V. Therefore, it would have around 40% improvement for the output ripple.

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 22 V2.1, 2013-10-22

C6a

3.5V

C13

4.0V

Control Unit

Internal

Bias

C6b

3.2V

G11

Active Burst

Mode

C5 20 ms Blanking

Time

CFB

C12

Vcsth_burst

VFB_burst

G10 & FF1

FBB

Current Limiting

Burst detect

and adjust

Figure 25: Active Burst Mode

The Active Burst Mode is located in the Control Unit. Figure 24 shows the related components.

3.7.2.1 Selectable burst entry level

The burst mode entry level can be selected by changing the different capacitor CFB at FBB pin. There are 4 levels to

be selected with different capacitor which are targeted for 10%, 6.67%, 4.38% and 0% of the maximum input power.

At the same time, the exit burst levels are targeted to 20%, 13.3%, 9.6% and 0% of the maximum power accordingly.

The corresponding capacitance range is from 6.8nF to 100pF. The below table is the recommended capacitance

range for the entry and exit level with the CFB capacitor.

CFB

Entry level

Exit level

% of Pin_max

VFB_burst

% of Pin_max

Vcsth_burst

>=6.8nF (5%,X7R)

10%

1.60V

20%

0.45V

1nF~2.2nF (1%,COG)

6.67%

1.42V

13.3%

0.37V

220pF~470pF (1%,COG)

4.38%

1.27V

9.6%

0.31V

<=100pF (1%,COG)

never

always

The selection is at the 1st 1ms of the UVLO “ON” (Vcc > 17V) during the 1st start up but it does not detect in the

subsequent re-start due to auto-restart protection. In case there is protection triggered such as input OVP before

starts up, the detection will be held until the protection is removed. When the Vcc reaches the UVLO “ON” in the 1st

start up, the capacitor CFB at FBB pin is charged by a 5V voltage source through the RFB resistor. When the voltage

at FBB pin hits 4.5V, the FF4 will be set, the switch S9 is turned “ON” and the counter will increase by 1. Then the

CFB is discharged through a 500Ω resistor. After reaching 0.5V, the FF4 is reset and the switch S9 is turned “OFF”.

Then the CFB capacitor is charged by the 5V voltage source again until it reaches 4.5V. The process repeats until

the end of 1ms. Then the detection is ended. After that, the total number of count in the counter is compared and

the VFB-burst and the Vcs_burst are selected accordingly (Figure 26)

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 23 V2.1, 2013-10-22

C19

CFB

C20

0.5V

4.5V

Control Unit

FBB

500

RFB

counter

Comparator

logic

VCSth_burst

VFB_burst

1ms

timer

UVLO during

1st startup

S Q

UVLO

FF4

Figure 26: Entry Burst Mode detection

3.7.2.2 Entering Active Burst Mode

The FBB signal is kept monitoring by the comparator C5 (Figure 25). During normal operation, the internal

blanking time counter is reset to 0. When FBB signal falls below VFB_burst, it starts to count. When the counter reaches

20ms and FBB signal is still below VFB_burst, the system enters the Active Burst Mode. This time window prevents a sudden

entering into the Active Burst Mode due to large load jumps.

After entering Active Burst Mode, a burst flag is set and the internal bias is switched off in order to reduce the

current consumption of the IC to about 620µA.

It needs the application to enforce the VCC voltage above the Undervoltage Lockout level of 10.5V such that the

Startup Cell will not be switched on accidentally. Or otherwise the power loss will increase drastically. The

minimum VCC level during Active Burst Mode depends on the load condition and the application. The lowest

VCC level is reached at no load condition.

3.7.2.3 Working in Active Burst Mode

After entering the Active Burst Mode, the FBB voltage rises as VOUT starts to decrease, which is due to the

inactive PWM section. The comparator C6a monitors the FBB signal. If the voltage level is larger than 3.5V, the

internal circuit will be activated; the Internal Bias circuit resumes and starts to provide switching pulse. In Active

Burst Mode the gate G10 is released and the current limit is reduced to Vcsth_burst (Figure 3 and Figure 25). In one

hand, it can reduce the conduction loss and the other hand, it can reduce the audible noise. If the load at VOUT is

still kept unchanged, the FBB signal will drop to 3.2V. At this level the C6b deactivates the internal circuit again

by switching off the Internal Bias. The gate G11 is active again as the burst flag is set after entering Active Burst

Mode. In Active Burst Mode, the FBB voltage is changing like a saw tooth between 3.2V and 3.5V (Figure 27).

3.7.2.4 Leaving Active Burst Mode

The FBB voltage will increase immediately if there is a high load jump. This is observed by the comparator C13

(Figure 25). Since the current limit is reduced to 31%~45% of the maximum current during active burst mode, it

needs a certain load jump to raise the FBB signal to exceed 4.0V. At that time the comparator C5 resets the

Active Burst Mode control which in turn blocks the comparator C12 by the gate G10. The maximum current can

then be resumed to stabilize VOUT.

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 24 V2.1, 2013-10-22

VFB_burst

3.5V

4.0V

VFBB

Vcsth_burst

Vcsth

VCS

10.5V

VVCC t

620uA

IVCC

5.7mA

VOUT

20ms Blanking Time

Current limit level during

Active Burst Mode

3.2V

Entering

Active Burst

Mode

Blanking Timer

Leaving Active

Burst Mode

Figure 27: Signals in Active Burst Mode

3.7.3 Protection Modes

The IC provides Auto Restart mode as the major protection feature. Auto Restart mode can prevent the SMPS from

destructive states. There are 3 kinds of auto restart mode; normal auto restart mode, odd skip auto restart mode

and non switch auto restart mode. Odd skip auto restart mode is that there is no detect of fault and no switching

pulse for the odd number restart cycle. At the even number of restart cycle the fault detect and soft start switching

pulses maintained. If the fault persists, it would continue the auto-restart mode. However, if the fault is removed,

it can release to normal operation only at the even number auto restart cycle (Figure 28).

10.5V

VCS

VVCC

17V

Fault

detected No detect Startup and detect

No detect

Figure 28: Odd skip auto restart waveform

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 25 V2.1, 2013-10-22

Non switch auto restart mode is similar to odd skip auto restart mode except the start up switching pulses are also

suppressed at the even number of the restart cycle. The detection of fault still remains at the even number of the

restart cycle. When the fault is removed, the IC will resume to normal operation at the even number of the restart

cycle (Figure 29).

10.5V

VCS

VVCC

17V

Fault

detected No detect Startup and detect

No detect

No switching

Figure 29: Non switch auto restart waveform

The main purpose of the odd skip auto restart is to extend the restart time such that the power loss during auto

restart protection can be reduced. This feature is particularly good for smaller Vcc capacitor where the restart time

is shorter.

The following table lists the possible system failures and the corresponding protection modes.

VCC Over voltage (1)

Odd skip Auto Restart Mode

VCC Over voltage (2)

Odd skip Auto Restart Mode

Over load

Odd skip Auto Restart Mode

Open Loop

Odd skip Auto Restart Mode

VCC Undervoltage

Normal Auto Restart Mode

Short Optocoupler

Normal Auto Restart Mode

Over temperature

Non switch Auto Restart Mode

3.7.3.1 Vcc OVP, OTP and Vcc under voltage

20.5V

4.5V

Voltage

Reference

Control Unit

Auto Restart

Mode Reset

VVCC < 10.5V

FBB

softs_period

Spike

Blanking

30μs

Thermal Shutdown

Tj >130°C

Auto Restart

mode

VCC

C2 120μs blanking

time

25.5V

Figure 30: Vcc OVP and OTP

There are 2 types of Vcc over voltage protection; Vcc OVP (1) and Vcc OVP (2). The Vcc OVP (1) takes action

only during the soft start period. The Vcc OVP (2) takes the action in any conditions.

Vcc OVP (1) condition is when VVCC voltage is > 20.5V, VFBB voltage is > 4.5V and during soft start period, the IC

enters into odd skip Auto Restart Mode. This condition likely happens during start up at open loop fault (Figure 30).

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 26 V2.1, 2013-10-22

Vcc OVP (2) condition is when VVCC voltage is > 25.5V, the IC enters into odd skip Auto Restart Mode (Figure

30).

The over temperature protection OTP is sensed inside the controller IC. The Thermal Shutdown block keeps on

monitoring the junction temperature of the controller. After detecting a junction temperature higher than 130°C, the

IC will enter into the non switch Auto Restart mode. The ICE3AR2280VJZ has also implemented with a 50°C

hysteresis. That means the IC can only be recovered when the controller junction temperature is dropped 50°C

lower than the over temperature trigger point (Figure 30).

The VCC undervoltage and short opto-coupler will go into the normal auto restart mode inherently.

In case of VCC undervoltage, the Vcc voltage drops indefinitely. When it drops below the Vcc under voltage lock out

“OFF” voltage (10.5V), the IC will turn off the IC and the startup cell will turn on again. Then the Vcc voltage will be

charged up to UVLO “ON” voltage (17V) and the IC turns on again provided the startup cell charge up current is not

drained by the fault. If the fault is not removed, the Vcc will continue to drop until it hits UVLO “OFF” voltage and the

restart cycle repeats.

Short Optocoupler can lead to Vcc undervoltage because once the opto-coupler (transistor side) is shorted, the

feedback voltage will drop to zero and there will be no switching pulse. Then the Vcc voltage will drop same as

the Vcc undervoltage.

3.7.3.2 Over load, open loop protection

C11

4.5V

0.9V

4.5V

Control Unit

5.0V

FBB

CBK Spike

Blanking

30us

Ichg_EB

counter

20ms

Blanking

Time

Voltage

Reference

Auto Restart

Mode Reset

VVCC < 10.5V

Auto

Restart

Mode

ROV2

500CT1

Figure 31: Over load, open loop protection

In case of Overload or Open Loop, the FBB exceeds 4.5V which will be observed by comparator C4. Then the built-

in blanking time counter starts to count. When it reaches 20ms, the extended blanking time counter CT1 is

activated. The switch S2 is turned on and the voltage at the BV pin will be discharged through 500Ω resistor. When

it drops to 0.9V, the switch S2 is turned off and the Switch S1 is turned on. Then a constant current source Ichg_EB

will start to charge up BV pin. When the voltage hits 4.5V which is monitored by comparator C11, the switch S1 is

turned off and the count will increase by 1. Then the switch S2 will turn on again and the voltage will drop to 0.9V

and rise to 4.5V again. The count will then increase by 1 again. When the total count reaches 256, the counter

CT1 will stop and it will release a high output signal. When both the input signals at AND gate G5 is high, the

odd skip Auto Restart Mode is activated after the 30µs spike blanking time (Figure 31).

The total blanking time depends on the addition of the built-in and the extended blanking time. If there is no CBK

capacitor at BV pin, the count will finish within 0.1ms and the equivalent blanking time is just the built-in time of

20ms.

Since the BV pin is a multi-function pin, it would share with different functions. The resistor ROV2 from input OVP

feature application may however affect the extendable blanking time (Figure 31). Thus it should take the ROV2

into the calculation of the extendable blanking time. For example the extended blanking time may be changed

from 181ms to 212ms for 42.2KΩ to 15KΩ ROV2 resistor. The list below shows one particular CBK, ROV2 vs

blanking time.

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 27 V2.1, 2013-10-22

CBK

ROV2

Extended blanking time

Overall blanking time

0.1uF

42.2KΩ

161ms

181ms

0.1uF

39.6KΩ

162ms

182ms

0.1uF

15KΩ

192ms

212ms

Another factor to affect the extended blanking time is the input voltage through the ROV1 and ROV2. It would, on the

contrary, reduce the extended blanking time.

3.7.4 Input OVP Mode

When the AC input voltage is out of the designed operating range (e.g. > 300Vac), the voltage at the input bulk

capacitor will increase at the same time. If the MOSFET keeps on switching, the drain voltage may be too high and

the MOSFET will exceed the maximum voltage rating and causes damages. The input OVP mode is to prevent this

phenomenon. The IC will sense the input voltage through the input bulk capacitor to the BV pin by 2 potential divider

resistors, ROV1 and ROV2 (Figure 32). During normal operation, the BV pin voltage is lower than VOVP_ref (1.98V). The

output of C14a is low and the output of G21 is high. Together with UVLO high signal (IC operating) the “S” input of

FF5 is low. The “Q” output of FF5 is low and the input OVP mode remains not activated. When there is an input over

voltage case, the input bulk capacitor voltage is increased and the BV voltage is increased to larger than VOVP_ref. The

output of C14a is high and the output of G21 is low. If the OVP persists for 400µs (blanking time) and the UVLO

signal is still high, the output of G20 is high. Then the “S” input of FF5 is high and the “Q” output of FF5 is high. The

input OVP mode is set. The case of UVLO signal low is not considered as it means the IC is not working.

C14a

Control Unit

Input OVP

ROV1

ROV2

Vbulk

UVLO

FF5

G20

G21

C14b

1.98V

1.91V

5µs Blanking

time

G22

400µs Blanking

time

Figure 32: Input OVP detection circuit

Once the system enters the input OVP mode, there will be no switching pulse and the IC keeps on monitoring the

BV signal. If the input OVP signal is not reset, there is no switching pulse in each restart cycle (Figure 33).

10.5V

VCS

VVCC

17V

No switching

VBV

1.91V

Input OVP

detected

Input OVP

released

Switching start at the

following restart cycle

1.98V

Figure 33: Input OVP mode waveform

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 28 V2.1, 2013-10-22

The IC implemented with hysteresis voltage to leave the input OVP protection. The hysteresis voltage at BV pin is

VOVP_hys (0.07V) and the input OVP reset voltage at BV pin is VOVP_ref - VOVP_hys; i.e. 1.91V. After the input OVP

protection is triggered, the voltage at BV pin needs to drop VOVP_hys from VOVP_ref before it can be reset.

When the BV voltage drops below 1.91V, the output of C14b and G22 are high (Figure 32). The “R” input of the

FF5 is high. Then the “Q” output of FF5 is low. The input OVP is reset. The system will turn on with soft start in the

coming restart cycle when Vcc reaches the Vcc “ON” voltage at 17V.

The input OVP feature can also be applied to customer defined protection circuit by pulling up the BV pin to

larger than VOVP_ref.

The formula to calculate the ROV1 and ROV2 are as below.

Set ROV1 to a particular value.

ROV2= ROV1* VOVP_ref /(VOVP - VOVP_ref)

The formula to calculate the input OVP reset voltage is as below.

VOVP_reset=(VOVP_ref -VOVP_hys)*( ROV1+ROV2)/ROV2

where VOVP: input over voltage; VOVP_reset: input over reset voltage; VOVP_ref: IC reference voltage for OVP; VOVP_hys: IC

hysteresis voltage for OVP; ROV1 and ROV2: resistors divider from input voltage to BV pin.

For example,

VOVP_ref=1.98V, VOVP_hys=0.07V

If input OVP voltage, VOVP=424Vdc (300Vac), ROV1=9MΩ, ROV2=42.2KΩ

Input OVP reset, VOVP_reset=408Vdc (289Vac)

To disable input OVP feature, the BV pin must be connected with a resistor ROV2≥15KΩ to IC ground and

remove ROV1.

(Remark: ROV2 must be always ≥15KΩ in all conditions, otherwise overload protection may not work)

3.7.5 Action sequence at BV pin

Since there are 2 functions at the same BV pin; input OVP and extended blanking time, the action of sequence is

whichever starts first takes the priority. When the “Extended blanking time” is triggered by OLP and follows with the

“Input OVP” triggering, then the OLP will continue to work until it ends. The IC would recheck the signal at BV pin

after one skip cycle. If the BV signal exceeds the input OVP threshold, it would go to input OVP mode.

CoolSET™ F3R80

ICE3AR2280VJZ

Functional Description

Data Sheet 29 V2.1, 2013-10-22

10.5V

VCS

VVCC

17V

No switching

VBV

1.91V

1.98V

VFB

4.5V Extended OLP

blanking time

OLP

detected OLP

released

Input OVP

released

Input OVP

0.9V

4.5V

Input OVP fault started( but

overridden by extended blanking

OLP time) Input OVP

detected

Switching start at the

following restart cycle

Built in 20ms OLP

blanking time

Figure 34: Input OVP during extended blanking time

One typical case happened is that the overload happened first and it follows with the “Input OVP” feature at the 1st

20ms blanking time. Since the overload protection is still not triggered at the 1st 20ms blanking time period and the

extended blanking time is not running, the input OVP mode will trigger right away.

10.5V

VCS

VVCC

17V

No switching

VBV

1.91V

Switching start at the

following restart cycle

1.98V

VFB

4.5V

Input OVP

detected

Built in 20ms OLP

blanking time

OLP

detected OLP

released

Input OVP

released

Input OVP

Figure 35: Input OVP during first 20ms blanking time

CoolSET™ F3R80

ICE3AR2280VJZ

Electrical Characteristics

Data Sheet 30 V2.1, 2013-10-22

4 Electrical Characteristics

Note: All voltages are measured with respect to ground (Pin 8). The voltage levels are valid if other ratings

are not violated.

4.1 Absolute Maximum Ratings

Note: Absolute maximum ratings are defined as ratings, which when being exceeded may lead to destruction of

the integrated circuit. For the same reason make sure, that any capacitor that will be connected to pin 7

(VCC) is discharged before assembling the application circuit. Ta=25°C unless otherwise specified.

Parameter

Symbol

Limit Values

Unit

Remarks

min.

max.

Drain Source Voltage

VDS

800

Pulse drain current, tp limited by Tjmax

ID_Puls

4.9

Avalanche energy, repetitive tAR limited

by max. Tj=150°C1)

EAR

0.047

Avalanche current, repetitive tAR limited

by max. Tj=150°C

IAR

1.5

VCC Supply Voltage

VVCC

-0.3

FBB Voltage

VFBB

-0.3

5.5

BV Voltage

VBV

-0.3

5.5

CS Voltage

VCS

-0.3

5.5

Junction Temperature

-40

150

°C

Controller & CoolMOS™

Storage Temperature

-55

150

°C

Thermal Resistance

Junction -Ambient

RthJA

K/W

Soldering temperature,

wavesoldering only allowed at leads

Tsold

260

°C

1.6mm (0.063in.) from

case for 10s

ESD Capability (incl. Drain Pin)

VESD

Human body model2)

1) Repetitive avalanche causes additional power losses that can be calculated as PAV=EAR*f

2) According to EIA/JESD22-A114-B (discharging a 100pF capacitor through a 1.5KΩ series resistor)

CoolSET™ F3R80

ICE3AR2280VJZ

Electrical Characteristics

Data Sheet 31 V2.1, 2013-10-22

4.2 Operating Range

Note: Within the operating range the IC operates as described in the functional description.

Parameter

Symbol

Limit Values

Unit

Remarks

min.

max.

VCC Supply Voltage

VVCC

VVCCoff

Max value limited due to Vcc OVP

Junction Temperature of

Controller

TjCon

-40

130

°C

Max value limited due to thermal

shut down of controller

Junction Temperature of

CoolMOS™

TjCoolMOS

-40

150

°C

4.3 Characteristics

4.3.1 Supply Section

Note: The electrical characteristics involve the spread of values within the specified supply voltage and

junction temperature range TJ from – 40 °C to 125 °C. Typical values represent the median values,

which are related to 25°C. If not otherwise stated, a supply voltage of VCC = 17 V is assumed.

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Start Up Current

IVCCstart

200

300

μA

VVCC =16V

VCC Charge Current

IVCCcharge1

5.0

VVCC = 0V

IVCCcharge2

0.55

0.9

1.60

VVCC = 1V

IVCCcharge3

0.38

0.7

VVCC =16V

Leakage Current of

Start Up Cell and CoolMOS™

IStartLeak

0.2

μA

VDrain = 650V

at Tj=100°C1)

Supply Current with

Inactive Gate

IVCCsup1

1.9

3.2

Supply Current with Active Gate

IVCCsup2

3.4

4.8

IFBB = 0A

Supply Current in

Auto Restart Mode with Inactive

Gate

IVCCrestart

320

μA

IFBB = 0A

Supply Current in Active Burst

Mode with Inactive Gate

IVCCburst1

620

950

μA

VFBB = 2.5V

IVCCburst2

620

950

μA

VVCC = 11.5V, VFBB

= 2.5V

VCC Turn-On

ThresholdVCC Turn-Off

Threshold VCC Turn-On/Off

Hysteresis

VVCCon

VVCCoff

VVCChys

16.0

9.8

17.0

10.5

6.5

18.0

11.2

1) The parameter is not subjected to production test - verified by design/characterization

CoolSET™ F3R80

ICE3AR2280VJZ

Electrical Characteristics

Data Sheet 32 V2.1, 2013-10-22

4.3.2 Internal Voltage Reference

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Trimmed Reference Voltage

VREF

4.90

5.00

5.10

measured at pin FBB

IFBB = 0

4.3.3 PWM Section

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Fixed Oscillator Frequency

fOSC1

100

113

kHz

fOSC2

100

108

kHz

Tj = 25°C

Frequency Jittering Range

fjitter

±4.0

kHz

Tj = 25°C

Frequency Jittering period

Tjitter

4.0

Tj = 25°C

Max. Duty Cycle

Dmax

0.70

0.75

0.80

Min. Duty Cycle

Dmin

VFBB < 0.3V

PWM-OP Gain

3.05

3.25

3.45

Voltage Ramp Offset

VOffset-Ramp

0.60

VFBB Operating Range

Min Level

VFBmin

0.7

VFBB Operating Range Max

level

VFBmax

4.3

CS=1V, limited by

Comparator C41)

FBB Pull-Up Resistor

RFB

9.0

15.4

23.0

kΩ

1) The parameter is not subjected to production test - verified by design/characterization

4.3.4 Soft Start time

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Soft Start time

tSS

CoolSET™ F3R80

ICE3AR2280VJZ

Electrical Characteristics

Data Sheet 33 V2.1, 2013-10-22

4.3.5 Control Unit

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Input OVP reference voltage for

comparator C14a

VOVP_ref

1.90

1.98

2.06

Tj = 25°C

Input OVP hysteresis C14b

VOVP_hys

0.07

Tj = 25°C

Blanking time voltage lower limit

for Comparator C3

VBKC3

0.80

0.90

1.00

Blanking time voltage upper limit

for Comparator C11

VBKC11

4.28

4.50

4.72

Over Load Limit for Comparator C4

VFBC4

4.28

4.50

4.72

Entry Burst select High level for

Comparator C19

VFBC19

4.28

4.50

4.72

Entry Burst select Low level for

Comparator C20

VFBC20

0.40

0.50

0.60

Active Burst Mode

Entry Level for

Comparator C5

10% Pin_max

VFB_burst1

1.51

1.60

1.69

< 7 counts

6.67% Pin_max

VFB_burst2

1.34

1.42

1.50

8 ~ 39 counts

4.38% Pin_max

VFB_burst3

1.20

1.27

1.34

40 ~ 191 counts

Active Burst Mode High Level for

Comparator C6a

VFBC6a

3.35

3.50

3.65

In Active Burst Mode

Active Burst Mode Low Level for

Comparator C6b

VFBC6b

3.06

3.20

3.34

Active Burst Mode Level for

Comparator C13

VFBC13

3.85

4.00

4.15

Overvoltage Detection Limit for

Comparator C1

VVCCOVP1

19.5

20.5

21.5

VFBB = 5V, during soft

start

Overvoltage Detection Limit for

Comparator C2

VVCCOVP2

25.0

25.5

26.3

Charging current for extended

blanking time

Ichg_EB

460

720

864

μA

Thermal Shutdown1)

TjSD

130

140

150

°C

Controller

Hysteresis for thermal Shutdown1)

TjSD_hys

°C

Built-in Blanking Time for Overload

Protection or enter Active Burst Mode

tBK

Timer for entry burst select

tEBS

Spike Blanking Time for Auto-Restart

Protection

tSpike

μs

1) The parameter is not subjected to production test - verified by design/characterization. The thermal shutdown temperature refers to the

junction temperature of the controller.

Note: The trend of all the voltage levels in the Control Unit is the same regarding the deviation except

VVCCOVP and VVCCPD

CoolSET™ F3R80

ICE3AR2280VJZ

Electrical Characteristics

Data Sheet 34 V2.1, 2013-10-22

4.3.6 Current Limiting

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Peak Current Limitation

(incl. Propagation Delay)

Vcsth

0.98

1.06

1.13

dVsense / dt = 0.6V/µs

(Figure 21)

Peak Current

Limitation during

Active Burst Mode

20% Pin_max

Vcsth_burst1

0.37

0.45

0.51

< 7 counts

13.3% Pin_max

Vcsth_burst2

0.30

0.37

0.44

8 ~ 39 counts

9.6% Pin_max

Vcsth_burst3

0.23

0.31

0.37

40 ~ 191 counts

Leading Edge

Blanking

Normal mode

tLEB_normal

220

Burst mode

tLEB_burst

180

CS Input Bias Current

ICSbias

-1.5

-0.2

μA

VCS =0V

4.3.7 CoolMOS™ Section

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Drain Source Breakdown Voltage

V(BR)DSS

800

870

Tj = 25°C

Tj = 110°C1)

Drain Source On-Resistance

RDSon

2.26

5.02

2.62

5.81

Tj = 25°C

Tj=125°C1)

at ID = 0.81A

Effective output capacitance, energy

Co(er)

16.3

VDS = 0V to 480V

Rise Time

trise

302)

Fall Time

tfall

302)

1) The parameter is not subjected to production test - verified by design/characterization

2) Measured in a Typical Flyback Converter Application

CoolSET™ F3R80

ICE3AR2280VJZ

Typical Controller Performance Characteristics

Data Sheet 35 V2.1, 2013-10-22

5 Typical Controller Performance Characteristics

Characterisrtic graphs are normalized at Ta=25°C

Figure 36: Line OVP (VOVP_ref) vs. Ta

Figure 37: Hystersis of Line OVP (VOVP_hys) vs. Ta

CoolSET™ F3R80

ICE3AR2280VJZ

CoolMOS™ Performance Characteristics

Data Sheet 36 V2.1, 2013-10-22

6 CoolMOS™ Performance Characteristics

Figure 38: Safe Operating Area (SOA) curve for ICE3AR2280VJZ

Figure 39: SOA temperature derating coefficient curve

CoolSET™ F3R80

ICE3AR2280VJZ

CoolMOS™ Performance Characteristics

Data Sheet 37 V2.1, 2013-10-22

Figure 40: Power dissipation; Ptot=f(Ta)

Figure 41: Drain-source breakdown voltage; VBR(DSS)=f(Tj), ID=0.25mA

CoolSET™ F3R80

ICE3AR2280VJZ

Input Power Curve

Data Sheet 38 V2.1, 2013-10-22

7 Input Power Curve

Two input power curves giving the typical input power versus ambient temperature are showed below;

Vin=85Vac~265Vac (Figure 42) and Vin=230Vac+/-15% (Figure 43). The curves are derived based on a typical

discontinuous mode flyback model which considers either 50% maximum duty ratio or 100V maximum

secondary to primary reflected voltage (higher priority). The calculation is based on no copper area as heatsink

for the device. The input power already includes the power loss at input common mode choke, bridge rectifier

and the CoolMOS.The device saturation current (ID_Puls @ Tj=125°C) is also considered.

To estimate the output power of the device, it is simply multiplying the input power at a particular operating ambient

temperature with the estimated efficiency for the application. For example, a wide range input voltage (Figure 42),

operating temperature is 50°C, estimated efficiency is 85%, then the estimated output power is 23W (28W * 85%).

Figure 42: Input power curve Vin=85~265Vac; Pin=f(Ta)

Figure 43: Input power curve Vin=230Vac; Pin=f(Ta)

CoolSET™ F3R80

ICE3AR2280VJZ

Outline Dimension

Data Sheet 39 V2.1, 2013-10-22

8 Outline Dimension

Figure 44: PG-DIP-7 (Pb-free lead plating Plastic Dual-in-Line Outline)

CoolSET™ F3R80

ICE3AR2280VJZ

Marking

Data Sheet 40 V2.1, 2013-10-22

9 Marking

Figure 45: Marking for ICE3AR2280VJZ

CoolSET™ F3R80

ICE3AR2280VJZ

Schematic for recommended PCB layout

Data Sheet 41 V2.1, 2013-10-22

10 Schematic for recommended PCB layout

Figure 46: Schematic for recommended PCB layout

General guideline for PCB layout design using F3 CoolSET™ (refer to Figure 46):

1. “Star Ground “at bulk capacitor ground, C11:

“Star Ground “means all primary DC grounds should be connected to the ground of bulk capacitor C11

separately in one point. It can reduce the switching noise going into the sensitive pins of the CoolSET™

device effectively. The primary DC grounds include the followings.

a. DC ground of the primary auxiliary winding in power transformer, TR1, and ground of C16 and Z11.

b. DC ground of the current sense resistor, R12

c. DC ground of the CoolSET™ device, GND pin of IC11; the signal grounds from C13, C14, C15 and collector

of IC12 should be connected to the GND pin of IC11 and then “star “connect to the bulk capacitor ground.

d. DC ground from bridge rectifier, BR1

e. DC ground from the bridging Y-capacitor, C4

2. High voltage traces clearance:

High voltage traces should keep enough spacing to the nearby traces. Otherwise, arcing would incur.

a. 400V traces (positive rail of bulk capacitor C11) to nearby trace: > 2.0mm

b. 600V traces (drain voltage of CoolSET™ IC11) to nearby trace: > 2.5mm

3. Filter capacitor close to the controller ground:

Filter capacitors, C13, C14 and C15 should be placed as close to the controller ground and the controller

pin as possible so as to reduce the switching noise coupled into the controller.

CoolSET™ F3R80

ICE3AR2280VJZ

Schematic for recommended PCB layout

Data Sheet 42 V2.1, 2013-10-22

Guideline for PCB layout design when >3KV lightning surge test applied (refer to Figure 46):

1. Add spark gap

Spark gap is a pair of saw-tooth like copper plate facing each other which can discharge the accumulated

charge during surge test through the sharp point of the saw-tooth plate.

a. Spark Gap 3 and Spark Gap 4, input common mode choke,

L1: Gap separation is around 1.5mm (no safety concern)

b. Spark Gap 1 and Spark Gap 2, Live / Neutral to GROUND:

These 2 Spark Gaps can be used when the lightning surge requirement is>6KV.

230Vac input voltage application, the gap separation is around 5.5mm

115Vac input voltage application, the gap separation is around 3mm

2. Add Y-capacitor (C2 and C3) in the Live and Neutral to ground even though it is a 2-pin input

3. Add negative pulse clamping diode, D11 to the Current sense resistor, R12:

The negative pulse clamping diode can reduce the negative pulse going into the CS pin of the CoolSET™

and reduce the abnormal behavior of the CoolSET™. The diode can be a fast speed diode such as 1N4148.

The principle behind is to drain the high surge voltage from Live/Neutral to Ground without passing through

the sensitive components such as the primary controller, IC11.

w w w . i n f i n e o n . c o m

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