Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
1
General Description
The AP3772H is a high performance AC/DC power
supply controller for battery charger and adapter
applications. The device uses Pulse Frequency
Modulation (PFM) method to build discontinuous
conduction mode (DCM) flyback power supplies.
The AP3772H provides accurate constant voltage,
constant current (CV/CC) regulation without
requiring an opto-coupler and the secondary control
circuitry. It also eliminates the need of loop
compensation circuitry while maintaining good
stability. The AP3772H can achieve excellent
regulation and high average efficiency, yet meets
no-load consumption less than 30mW. It can also
achieve excellent dynamic performance while
maintaining 30mW standby power with AP4340.
The AP3772H ha s a built-in fixed cable voltage drop
compensation function. The magnitude of the cable
compensation voltage is set as 3% of the rated output
voltage. It also has an adjustable built-in line
compensation function to achieve tight CC.
The AP3772H is available in SOT-23-6 package.
Features
• Primary Side Control for Tight Constant Current
and Constant Voltage
• 30mW No-load Input Power
• Excellent Dynamic Performance with AP4340
• Bipolar Junction Transistor (BJT) Driving
• Proprietary Adjustable Line Compensation for
CC Variation
• Constant and Built-in 6%, 3% and No Cable
Voltage Drop Compensation
• Enhanced Audio Noise Suppression
• Open Circuit Protection
• Over Voltage Protection
• Short Circuit Pro tection
• SOT-23-6 package
Applications
• Adapters/Chargers for Cell/cordless Phones,
PDAs, MP3 and Other Portable Devices
• LED Driver
• Standby and Auxiliary Power Supplies
Figure 1. Package Type of AP3772H
SOT-23-6
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
2
Pin Configuration
K6 Package
(SOT-23-6)
1
2
34
5
Pin 1 Mark
6
Figure 2. Pin Configuration of AP3772H (Top View)
Pin Description
Pin Number Pin Name Function
1 OUT
The OUT pin is used to turn on and turn off the power switch. When
turning on the power switch, the OUT pin will output 30mA source
current to support the base current of the power BJT. When turning
off the power switch, the resistance between the OUT and GND will
become to 5Ω
2 GND
The GND pin is the ground of the IC. When the po wer BJT is turned
off, a fast reverse sinking current to the gate of BJT will flow out
from this pin. Attention should be paid to in the PCB layout
3 VCC
The VCC pin supplies the power for the IC. In order to get the
correct operation of the IC, a capacitor with low ESR should be
placed as close as possible to the VCC pin
4 CS
The CS is the current sense pin of the IC. The IC will turn off the
power BJT according to the voltage on the CS pin. When the power
BJT is on, a current is output from the CS pin which is proportional
to the line voltage to realize the function of line compensation
5 CPC
A capacitor more than 10nF should be connected to this pin. The
voltage of CPC pin is linear to load of the system and it is used for
the functions of cable voltage drop compensation and audio noise
suppression
6 FB
The CV and CC regulation are realized based on the voltage
sampling of this pin
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
3
Functional Block Diagram
Regulator
&
Bias
OVP
&
OCKP
PFM TONS
UVLO
UVLO
CV_ctrl PFM Driver
RQ
S
RQ
S
CC_ctrl
FB
CS
CPC
VCC
OUT
GND
Cable
Compensation
Constant Voltage
Control
Constant Current
Control
Tonsec
Detector
0.1V
VFB
4
3
1
2
5
6PRO
VREF1
COMP
EA
Peak Current
Control & LEB
TONS
Dynamic
Response
Pro
Dyn
CC_ctrl
Audio noise
Suppression
VREF2
Shutdown
Pre_Shutdown
Line
Compensation
Figure 3. Functional Block Diagram of AP3772H
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
4
Ordering Information
AP3772H -
Package Temperature
Range
Cable
Compensation
Voltage Part Number Marking ID Packing
Type
SOT-23-6 -40 to 85°C
6% AP3772HAK6TR-G1 GBC Tape &
Reel
3% AP3772HBK6TR-G1 GKJ Tape &
Reel
0 AP3772HCK6TR-G1 GJD Tape &
Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Absolute Maximum Ratings (Note 1)
Parameter Symbol Value Unit
Supply Voltage VCC -0.3 to 30 V
CS, CPC to GND -0.3 to 7 V
FB Input Voltage VFB -40 to 10 V
Source Current at OUT PinISOURCEInternally LimitedA
Operating Junction Temperature TJ 150 ºC
Sto rage Temperature TSTG -65 to 150 ºC
Lead Temperature (Soldering, 10
sec) TLEAD 300 ºC
Thermal Resistance (Junction to
Ambient) θJA 200 ºC/W
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended p eriods may affect device reliability.
G1: Green
TR: Tape & Reel
Package
K6: SOT-23-6
Circuit Type
Cable Compensation Voltage
A: 6%
B: 3%
C: 0
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
VCC =15V, TA=25°C, unless otherwise specified.
Parameter Symbol Conditions Min Typ Max Unit
UVLO SECTION
Start up Thres hold VTH (ST) 13 15.5 18 V
Minimal Operating Voltage VOPR(MIN) 3 3.5 4.5
V
STANDBY CURRENT SECTION
Startup Current IST VCC=VTH (ST)-1V,
Before startup 0 0.2 0.6
µA
Operating Current ICC(OPR) Static current 250 500 600 µA
DRIVE OUTPUT SECTION
Output Current Sink ISINK Apply 1V @ OUT pin 150 330 500 mA
Source ISOURCE 30 40 50 mA
Maximum Off Time tOFF(MAX) 14 18 25 ms
CURRENT S ENSE SE CTI ON
Current Sense Threshold
Voltage at Heavy Load VCS1 500 525 550 mV
Leading Edge Blanking tLEB The minimum power
switch turn on time 300 500 650 ns
FEEDBACK INPUT SECTION
Input Resistance of FB Pin RFB V
FB=4V 1 1.6 2
MΩ
Feedback Threshold VFB 3.98 4.04 4.1 V
LINE COMPENSATION SECTION
Line Compensation
Transconductance (Note 2) gm 0.8 1.2 1.6
µS
CABLE COMPENSATION SECTION
Cable Compensation
Voltage ∆VFB_CABLE
/VFB %
AP3772HA 5 6 7
%
AP3772HB 2 3 4
AP3772HC 0
DYNAMIC FUNCTION SECTION
Delay Time for Dynamic
Function tD 110 150 200 µs
Trigger Voltage for
Dynamic Function VTRIGGER 120 150 180 mV
PROTECTION SECTION
Over Voltage Protection VFB(OVP) 7 8 9 V
Maximum On Time of
Primary Side tonp
(MAX) 20 35 50
µs
Note 2: Line compensation voltage on CS pin: LINEm
PRI
AUX
DCINCS Rg
RR R
N
N
VV ⋅⋅
+
⋅⋅=
76
6
_
Δ
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
6
Typical Performance Characteristics
Figure 4. Operating Current vs. Supply Voltage Figure 5. Source Current vs. Supply Volta ge
Figure 6. Minimal Operating Voltage Figure 7. Operating Current vs. Ambient Temperature
vs. Ambient Temperature
10 15 20 25 30
100
200
300
400
500
600
700
800
Operating Current (µA)
Supply Voltage (V)
10 15 20 25 30
20
25
30
35
40
Source Current (mA)
Supply Voltage (V)
-40-200 20406080100120140
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Minimal Operating Voltage (V)
Ambient Temperature (oC)
-40-200 20406080100120140
300
350
400
450
500
Operating Current (µA)
Ambient Temperature (oC)
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
7
Typical Performance Characteristics (Continued)
Figure 8. Start-up Current vs. Ambient Temperature Figure 9. Start-up Voltage vs. Ambient Temperature
Figure 10. FB Input Resistance vs. Ambient Temperature Figure 11. Source Current vs. Ambient Temperature
-40 -20 0 20 40 60 80 100 120 140
0.0
0.5
1.0
1.5
2.0
Start-up Current (µA)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
13
14
15
16
17
18
Start-up Voltage (V)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
1.00
1.25
1.50
1.75
2.00
FB Input Resistance (MΩ)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
20
22
24
26
28
30
Source Current (mA )
Ambient Temperature (oC)
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
8
Typical Performance Characteristics (Continued)
Figure 12. Current Sense Voltage Figure 13. Delay Time vs. Ambient Temperature
vs. Ambient Temperature
Figure 14. Primary Side Maximum On Time Figure 15. LEB vs. Ambient Temperature
vs. Ambient Temperature
-40 -20 0 20 40 60 80 100 120 140
500
525
550
575
600
Current Sense Voltage (mV)
Ambient Temperature (oC)
-20-100 1020304050607080
140
145
150
155
Delay Time (µs)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
500
525
550
575
600
LEB (ns)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
20
25
30
35
40
45
50
Primary Side Maximum On Time (µs)
Ambient Temperature (oC)
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
9
Typical Performance Characteristics (Continued)
Figure 16. Feedback Voltage vs. Supply Voltage Figure 17. Line Compensation Transconductance
vs. Ambient Temperature
10 15 20 25 30
3.5
3.6
3.7
3.8
3.9
4
Feedback Voltage (V)
Supply Voltage (V)
-40 -20 0 20 40 60 80 100 120 140
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Line Compensation Transconductance (µS)
Ambient Temperature (oC)
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
10
Typical Application
Figure 18. 5V/1A Output for Battery Charger of Mobile Phone
(The AP4340 Is Used to Achieve Fast Dynamic Resp onse)
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller AP3772H
Dec. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
11
Mechanical Dimensions
SOT-23-6 Unit: mm(inch)
2.820(0.111)
3.020(0.119)
2.650(0.104)
2.950(0.116)
1.500(0.059)
1.700(0.067)
0.950(0.037)TYP
1.800(0.071)
2.000(0.079)
0.300(0.012)
0.400(0.016)
0.700(0.028)REF
0.100(0.004)
0.200(0.008)
0°
8°
0.200(0.008)
0.300(0.012)
0.600(0.024)
0.000(0.000)
0.150(0.006)
0.900(0.035)
1.300(0.051) 1.450(0.057)
MAX
123
4
5
6
Pin 1 Mark
IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-
cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility fo r use of any its products for any
particular purpose, nor does BCD Semiconductor Man ufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
- Wafer Fab
Shanghai SIM-BCD Semiconductor Manufacturing Limited
800, Yi Shan Road, Shanghai 200233, China
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
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IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-
cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any
particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
- Wafer Fab
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
800 Yi Shan Road, Shanghai 200233, China
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
MAIN SITE
REGIONAL SALES OFFICE
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BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-
cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any
particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
- Wafer Fab
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
800 Yishan Road, Shanghai 200233, China
Tel: +021-6485-1491, Fax: +86-021-5450-0008
MAIN SITE
REGIONAL SALES OFFICE
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