KA5Q0740RT-YDTU - Fairchild Semiconductor

www.fairchildsemi.com

Rev.1.0.1

Features

• Quasi Resonant Converter Controller

• Internal Burst Mode Controller for Stand-by Mode

• Pulse by Pulse Current Limiting

• Over Current Latch Protection

• Over Voltage Protection ( Vsync: Min. 11V )

• Internal Thermal Shutdown Function

• Unde r Voltage Lo ck out

• Internal High Voltage Sense FET

• Auto- Re st art Mo de

Description

The Fairchild Power Swit ch(FPS) product family is speci ally

designed for an off-line SMPS with minimal external

components. The Fairchild Power Switch(FPS) consists of a

high voltage power SenseFET and a current mode PWM IC.

The integrated PWM controller includes the fixed oscillator,

the under voltage lock out, the leading edge blanking, the

optimized gate turn-on/turn-of f driver, the thermal shut down

protection, the over voltage protection, and the temperature

compensated precision current sources for loop compensation

and fault protection circuitry. Compared to a discrete

MOSFET and a controller or a RCC switching converter

solutions, a F airchild Power Switch(F PS) can reduce the total

number of components, design size, and weight, so it will

improve ef ficiency, productivity, and system reliabilit y. It has

a basic platform well suited for cost-effective design in a

quasi-resonant converter as a C-TV power supply.

TO-220F-5L

1. Drain 2. GND 3. VCC

4. Feedback 5. Sync

Internal Block Diagram

OSC

OVP

LEB

S _

Delay

Vref

Internal

Bias

TSD

150 Power-on

Reset

Burs t mode

controller

Ifb

Ids

Vds

REF.

PSR

REF.

Sync.

REF.

Ron

Roff

Rsense

Vfb offset

OCL

REF.

PWM

UVLO

Drain

GND

VCC

Feedbock

Sync

KA5Q0740RT

Fairchild Power Switch(FPS )

KA5Q0740RT

Absolute Maximum Ratings

(Ta=25°C, unless otherwise specified)

Notes:

1. Tj = 25°C to 150°C

2. Repetitive rating: Pulse width limited by maximum junction temperature

3. L = 30mH, VDD = 50V, RG = 25Ω, starting Tj = 25°C

4. L = 13uH, starting Tj = 25°C

Parameter Symbol Value Unit

Drain-source(GND) voltage (1) VDSS 400 V

Drain-Gate Voltage (RGS=1MΩ)V

DGR 400 V

Gate-source (GND) Voltage VGS ±30 V

Drain current pulsed (2) IDM 18.4 ADC

Single pulsed avalanche energy (3) EAS 360 mJ

Avalanche current (4) IAS 20 A

Continuous drain current (Tc = 25°C) ID4.6 ADC

Continuous drain current (TC=100°C) ID2.9 ADC

Supply voltage VCC 40 V

Analog input voltage range Vsync −0.3 to 13V V

VFB −0.3 to VCC V

Total Power Dissipation PD(Watt H/S) 42 W

Derating 0.33 W/°C

Operating temperature TOPR −25 to +85 °C

Thermal Resistance Rthjc 2.98 °C/W

Storage Temperature TSTG −55 to +150 °C

KA5Q0740RT

Electrical Characteristics (SFET part)

(Ta=25°C unless otherwise specified)

Note:

1. Pulse test : Pulse wid th ≤ 300µS, duty ≤ 2%

Parameter Symbol Condition Min. Typ. Max. Unit

Drain-source breakdown voltage BVDSS VGS = 0V, ID = 50µA 400 - - V

Zero gate voltage drain current IDSS VDS = Max, Rating, VGS = 0V - - 200 µA

VDS= 0.8*Max., Rating

VGS = 0V, Ta = 125°C- - 300 µA

Static drain-source on resistance (note) RDS(ON) VGS = 10V, ID = 2.3A - 0.9 1.1 Ω

Forward transconductance (note) gfs VDS = 50V, ID = 2.3A 6.0 - - S

Input capacitance Ciss VGS = 0V, VDS = 25V,

f = 1MHz

- 710 - pFOutput capacitance Coss - 90 -

Reverse transfer capacitance Crss - 10 -

Turn on delay time td(on) VDD= 0.5BVDSS, ID= 7.0A

(MOSFET switching

time are essentially

independent of operating

temperature)

-15-

Rise time tr - 55 -

Turn off delay time td(off) - 55 -

Fall time tf - 50 -

Total gate charge

(gate-source+gate-drain) Qg VGS = 10V, ID = 7.0A,

VDS = 0.5B VDSS (MOSFET

Switching time are Essentiall y

independent of operating

temperature)

-2026

Gate source charge Qgs - 4.0 -

Gate drain (Miller) charge Qgd - 7.3 -

----=

KA5Q0740RT

Electrical Characteristics

(Ta=25°C unless otherwise specified)

Note:

1. These parameters is the current flowing in the Control IC.

2. These parameters, although guaranteed, are tested in EDS(wafer test) process.

3. These parameters indicate Inductor Current.

Parameter Symbol Condition Min. Typ. Max. Unit

UVLO SECTION

Start Threshold Voltage VSTART VFB = GND 141516V

Stop Threshold Voltage VSTOP VFB = GND 8 9 10 V

SENSEFET SECTION

Drain to PKG Breakdown voltage BVpkg 60HZ AC, Ta = 25°C 3500 - - V

Drain to Source Breakdown voltage BVdss Ta = 25°C 400 - - V

Drain to Source Leakage current Idss Vdrain = 400V, Ta = 25°C - - 200 uA

OSCILLATOR SECTION

Initial Frequency FOSC - 182022kHz

Voltage Stability FSTABLE 12V ≤ Vcc ≤ 23V 0 1 3 %

Temperature Stability (note2) ∆FOSC -25°C ≤ Ta ≤ 85°C0±5±10%

Maximum Duty Cycle DMAX - 929598%

Minimum Duty Cycle DMIN ---0%

FEEDBACK SECTION

Feedback Source Current IFB VFB = GND 0.7 0.9 1.1 mA

Shutdown Feedback Voltage VSD Vfb ≥ 6.9V 6.9 7.5 8.1 V

Shutdown Delay Current IDELAY VFB = 5V 456µA

PROTECTION SECTION

Over Voltage Protection VOVP Vsync ≥ 11V 11 12 13 V

Over Current Latch Voltage (Note2) VOCL - 0.9 1.0 1.1 V

Thermal Shutdown Temp. TSD - 140 160 - °C

KA5Q0740RT

Electrical Characteristics (Continued)

(Ta=25°C unless otherwise specified)

Note:

1. These parameters is the current flowing in the Control IC.

2. These parameters, although guaranteed, are tested in EDS(wafer test) process.

3. These parameters indicate Inductor Current.

Parameter Symbol Condition Min. Typ. Max. Unit

Sync SECTION

Normal Sync High Threshold Voltage VNSH Vcc = 16V, Vfb = 5V 4.0 4.6 5.2 V

Normal Sync Low Threshold Voltage VNSL Vcc = 16V, Vfb = 5V 2.3 2.6 2.9 V

Burst Sync High Threshold Voltage VBSH Vcc = 10.5V, Vfb = 0V 3.2 3.6 4.0 V

Burst Sync Low Threshold Voltage VBSL Vcc = 10.5V, Vfb = 0V 1.1 1.3 1.5 V

BURST MODE SECTION

Burst mode Low Threshold Voltage VBURL Vfb = 0V 10.4 11.0 11.6 V

Burst mode High Threshold Voltage VBURH Vfb = 0V 11.4 12.0 12.6 V

Burst mode Enable Feedback Voltage VBEN Vcc = 10.5V 0.7 1.0 1.3 V

Burst mode Peak Current Limit IBU_PK Vcc = 10.5V 0.65 0.85 1.0 A

PRIMARY SIDE REGULATION SECTION

Primary Regulation Threshold Voltage VPR Ifb = 700uA, Vfb = 4V 32.0 32.5 33.0 V

Primary Regulation Transconductance GPR -2.02.6-mA/V

CURRENT LIMIT(SELF-PROTECTION)SECTION

Peak Current Limit(Note3) IPK -4.45.05.6A

TOTAL DEVICE SECTION

Start Up Current ISTART Vfb = GND, VCC = 14V - 0.1 0.2 mA

Operating supply current (Note1) IOP Vfb = GND, VCC = 16V -1018mAIOP(MIN) Vfb = GND, VCC = 10V

IOP(MAX) Vfb = GND, VCC = 28V

KA5Q0740RT

Typica l Perfo rma nce Characteristics

Figure 1. Start Voltage Figure 2. Stop Voltage

Figure 3. Stand by Curre nt Figure 4. Operating Current

Figure 5. Initial Frequency Figure 6. Maximum Duty

0.85

0.90

0.95

1.00

1.05

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.80

0.87

0.94

1.01

1.08

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.85

0.90

0.95

1.00

1.05

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.85

0.90

0.95

1.00

1.05

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

KA5Q0740RT

Typica l Perfo rmance Characteristics (Continued)

Figure 7. Feedback Offset Voltage Figu re 8. Fe edb ack Sourc e Cu rre nt

Figure 9. Ov er Vol tage Pr otect ion

Figure 10. Shutdown Feedback Voltage

Figure 11. ShutDo wn Delay Current Figure 12. Burst Mode Enable Feedback Voltage

0.00

0.30

0.60

0.90

1.20

1.50

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.80

0.88

0.96

1.04

1.12

1.20

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.85

0.90

0.95

1.00

1.05

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.60

0.80

1.00

1.20

1.40

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

KA5Q0740RT

Typica l Perfo rmance Characteristics (Continued)

Figure 13. Burst Mode Low Threshold Voltage Figure 14. B urst Mode Hi gh Threshold Vo ltag e

Figure 15. Burst Mode Sync. High Threshold Voltage Figure 16. Burst Mode Sync. Low Threshold Voltage

Figure 17. Primary Voltage Figure 18. Primary Mode Gain

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.80

0.88

0.96

1.04

1.12

1.20

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

KA5Q0740RT

Typica l Perfo rmance Characteristics (Continued)

Typical Perfo rmance Characte ristic s(MOSFET Part)

Figure 19. Peak Current Limit Figure 20 . Burs t Mode Peak Current Limit

Figure 21. Normal Mode Sync. High Threshold Voltage Figure 21. Normal Mode Sync. Low Threshold Voltage

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

0.90

0.94

0.98

1.02

1.06

1.10

-25℃0℃25℃50℃75℃100℃125℃150℃

Temp.(ºC)

25 50 75 100 125 150

100

200

300

400

500

AVALAN CHE ENE RG Y EAS [mJ]

CHANN EL TEMPERATURE Tch [℃]

EAS-TCH

10-5 10-4 10-3 10-2 10-1 100101

10-2

10-1

100

※ Notes :

1. ZθJC(t) = 1.32 ℃/W M ax.

2. Duty Factor, D=t1/t2

3. TJM - TC = PDM * ZθJC(t)

single pulse

D=0.5

0.02

0.2

0.05

0.1

0.01

ZθJC(t), Thermal Response

t1, Square Wave Pulse Duration [sec]

Figure 23. Transient Thermal Response Curve

Figure 22. Temperature (TC) vs. Eas Curve

KA5Q0740RT

Package Dimensions

TO-220F-5L

KA5Q0740RT

Package Dimensions (Continued)

TO-220F-5L(Forming)

KA5Q0740RT

2/18/02 0.0m 001

Stock#DSxxxxxxxx

 2001 Fairchild Semicond uctor Corporation

LIFE SU PP ORT POL ICY

FAIRCHILD’S PRODUCTS AR E NOT AUTHORIZED FOR USE AS C RITICAL COMPONENTS I N LIFE S UPPORT DEVICE S

OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR

CORPORA TION. As used he rein :

1. Life support devices or systems are devices or systems

which, (a) are intended for surgical implant into the body,

or (b) support or sustain life, and (c) whose failure to

perform when properly used in accordance with

instructions for use provided in the labeling, can be

reasonably expected to result in a significant injury of the

user.

2. A critical component in any component of a life support

device or syst em who se failure to perform can be

reasonably expected to cause the failure of the life support

device or system, or to affect its safety or effec tiv ene ss.

www.fairchildsemi.com

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY

PRO DUCTS HEREIN TO IMPROVE RELIABILITY, FUN C TION OR DESIGN . FAIRCHILD DO ES NOT ASSUME ANY

LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER

DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIG HTS, NOR THE RIGHTS OF OTHERS.

Ordering Information

TU : Non Forming Type

YDTU : Forming Type

Product Number Package Operating Temp.

KA5Q0740RT-TU TO-220F-5L -25°C to +85°C

KA5Q0740RT-YDTU TO-220F-5L(Forming)