Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller
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 has 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.
AP3772H
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 Protection
SOT-23-6 package
Applications
•
•
•
Adapters/Chargers for Cell/cordless Phones,
PDAs, MP3 and Other Portable Devices
LED Driver
Standby and Auxiliary Power Supplies
SOT-23-6
Figure 1. Package Type of AP3772H
Dec. 2012
Rev. 1. 1
1
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller
Pin Configuration
K6 Package
(SOT-23-6)
AP3772H
Pin 1 Mark
1
2
3
6
5
4
Figure 2. Pin Configuration of AP3772H (Top View)
Pin Description
Pin Number
Pin Name
Function
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
The GND pin is the ground of the IC. When the power 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
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
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
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
The CV and CC regulation are realized based on the voltage
sampling of this pin
1
OUT
2
GND
3
VCC
4
CS
5
CPC
6
FB
Dec. 2012
Rev. 1. 1
2
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller
Functional Block Diagram
VCC
3
UVLO
AP3772H
FB
6
OVP
&
OCKP
PRO
Regulator
&
Bias
T
ONS
UVLO
0.1V
COMP
PFM
Tonsec
Detector
Dynamic
Response
Pro
V
FB
EA
Constant Voltage
Control
R
S
Q
Dyn
CV_ctrl
CC_ctrl
PFM
Driver
1
OUT
Line
Compensation
V
REF1
V
REF2
Peak Current
Control & LEB
Shutdown
Pre_Shutdown
CS
4
T
ONS
Constant Current
Control
Audio noise
Suppression
R Q
S
CC_ctrl
2
GND
Cable
Compensation
5
CPC
Figure 3. Functional Block Diagram of AP3772H
Dec. 2012
Rev. 1. 1
3
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller
Ordering Information
AP3772H
Circuit Type
Cable Compensation Voltage
A: 6%
B: 3%
C: 0
Package
K6: SOT-23-6
Cable
Compensation
Voltage
6%
SOT-23-6
-40 to 85°C
3%
0
AP3772H
-
G1: Green
TR: Tape & Reel
Package
Temperature
Range
Part Number
AP3772HAK6TR-G1
AP3772HBK6TR-G1
AP3772HCK6TR-G1
Marking ID
GBC
GKJ
GJD
Packing
Type
Tape &
Reel
Tape &
Reel
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
Supply Voltage
CS, CPC to GND
FB Input Voltage
Source Current at OUT Pin
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10
sec)
Thermal Resistance (Junction to
Ambient)
Symbol
V
CC
V
FB
I
SOURCE
T
J
T
STG
T
LEAD
θ
JA
Value
-0.3 to 30
-0.3 to 7
-40 to 10
Internally Limited
150
-65 to 150
300
200
Unit
V
V
V
A
ºC
ºC
ºC
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 periods may affect device reliability.
Dec. 2012
Rev. 1. 1
4
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
Low-Power Off-line Primary Side Regulation Controller
Electrical Characteristics
V
CC
=15V, T
A
=25°C, unless otherwise specified.
AP3772H
Parameter
Symbol
Conditions
Min
13
3
Typ
15.5
3.5
0.2
500
330
40
18
525
500
1.6
4.04
1.2
6
3
0
150
150
8
35
Max
18
4.5
0.6
600
500
50
25
550
650
2
4.1
1.6
7
4
Unit
V
V
µA
µA
mA
mA
ms
mV
ns
UVLO SECTION
Startup Threshold
V
TH
(ST)
Minimal Operating Voltage
V
OPR
(MIN)
STANDBY CURRENT SECTION
Startup Current
I
ST
V
CC
=V
TH
(ST)-1V,
Before startup
Static current
Apply 1V @ OUT pin
0
250
150
30
14
500
Operating Current
I
CC
(OPR)
DRIVE OUTPUT SECTION
Sink
I
SINK
Output Current
Source
I
SOURCE
Maximum Off Time
t
OFF
(MAX)
CURRENT SENSE SECTION
Current Sense Threshold
V
CS1
Voltage at Heavy Load
Leading Edge Blanking
t
LEB
The minimum power
switch turn on time
V
FB
=4V
300
1
3.98
0.8
FEEDBACK INPUT SECTION
Input Resistance of FB Pin
R
FB
Feedback Threshold
V
FB
LINE COMPENSATION SECTION
Line Compensation
g
m
Transconductance (Note 2)
CABLE COMPENSATION SECTION
Cable
Voltage
Compensation
∆V
FB_CABLE
/V
FB
%
MΩ
V
µS
AP3772HA
AP3772HB
AP3772HC
5
2
%
DYNAMIC FUNCTION SECTION
Delay Time for Dynamic
t
D
Function
Trigger
Voltage
for
V
TRIGGER
Dynamic Function
PROTECTION SECTION
Over Voltage Protection
V
FB
(OVP)
Maximum On Time of
tonp
Primary Side
(MAX)
Note 2: Line compensation voltage on CS pin:
Δ
V
CS
=
V
IN
_
DC
⋅
110
120
7
20
200
180
9
50
µ
s
mV
V
µ
s
N
AUX
R
6
⋅
⋅
g
m
⋅
R
LINE
N
PRI
R
6
+
R
7
Dec. 2012
Rev. 1. 1
5
BCD Semiconductor Manufacturing Limited
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