Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
General Description
Features
The AP3772 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 AP3772 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 AP3772 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.
•
•
•
•
•
•
AP3772
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
The AP3772 has a built-in fixed cable voltage drop
compensation function. The magnitude of the cable
compensation voltage is set as 6%, 3% and 0 of the
rated output voltage respectively to meet various
cables with different length and gauge. It also has an
adjustable built-in line compensation function to
achieve tight CC.
•
•
•
Adapters/Chargers for Cell/cordless Phones,
PDAs, MP3 and Other Portable Devices
LED Driver
Standby and Auxiliary Power Supplies
The AP3772 is available in SOT-23-6 package.
SOT-23-6
Figure 1. Package Type of AP3772
Dec. 2011
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
1
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Pin Configuration
K6 Package
(SOT-23-6)
Pin 1 Mark
1
6
2
5
3
4
Figure 2. Pin Configuration of AP3772 (Top View)
Pin Description
Pin Number
Dec. 2011
Pin Name
1
OUT
2
GND
3
VCC
4
CS
5
CPC
6
FB
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
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
2
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Functional Block Diagram
VCC
3
UVLO
FB
OVP
&
OCKP
6
PRO
Regulator
&
Bias
UVLO
0.1V
COMP
Tonsec
Detector
PFM
TONS
Dynamic
Response
Pro
VFB
Constant Voltage
Control
EA
Dyn
R
Q
CV_ctrl
PFM
Driver
1
OUT
CC_ctrl
S
Line
Compensation
Shutdown
Peak Current
Control & LEB
VREF1
Pre_Shutdown
VREF2
CS
4
TONS
Constant Current
Control
R Q
CC_ctrl
S
Audio noise
Suppression
2
GND
Cable
Compensation
5
CPC
Figure 3. Functional Block Diagram of AP3772
Dec. 2011
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
3
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Ordering Information
AP3772
-
Circuit Type
G1: Green
Cable Compensation Voltage
A: 6%
B: 3%
C: 0
TR: Tape & Reel
Package
K6: SOT-23-6
Temperature
Range
Package
SOT-23-6
-40 to 85°C
Cable
Compensation
Voltage
6%
3%
0
Part Number
AP3772AK6TR-G1
AP3772BK6TR-G1
AP3772CK6TR-G1
Marking ID
GKA
GKB
GKC
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
Value
Unit
VCC
ISOURCE
TJ
TSTG
-0.3 to 30
-0.3 to 7
-40 to 10
Internally Limited
150
-65 to 150
V
V
V
A
ºC
ºC
TLEAD
300
ºC
θJA
200
ºC/W
VFB
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. 2011
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
4
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Electrical Characteristics
VCC =15V, TA=25°C, unless otherwise specified.
Parameter
Symbol
Conditions
UVLO SECTION
Startup Threshold
VTH (ST)
Minimal Operating Voltage
VOPR(MIN)
STANDBY CURRENT SECTION
Startup Current
IST
Operating Current
ICC(OPR)
DRIVE OUTPUT SECTION
Sink
ISINK
Output Current
Source
ISOURCE
Maximum Off Time
tOFF(MAX)
CURRENT SENSE SECTION
Current Sense Threshold
VCS1
Voltage at Heavy Load
Leading Edge Blanking
tLEB
FEEDBACK INPUT SECTION
Input Resistance of FB Pin
RFB
Feedback Threshold
VFB
LINE COMPENSATION SECTION
Line Compensation Current
ILINE
CABLE COMPENSATION SECTION
Cable Compensation
Voltage
∆VFB
_CABLE/VFB
%
VCC=VTH (ST)-1V,
Before startup
Static current
Apply 1V @OUT pin
The minimum power
switch turn on time
VFB=4V
Typ
Max
Unit
13
3
15.5
3.5
18
6.5
V
V
0
0.2
0.6
µA
250
500
600
150
24
330
30
500
40
18
mA
mA
ms
500
525
550
mV
300
500
650
ns
1
3.98
1.6
4.04
2
4.1
MΩ
V
VFB=-5V
AP3772A
AP3772B
AP3772C
DYNAMIC FUNCTION SECTION
Delay Time for Dynamic
tD
Function
Trigger
Voltage
for
VTRIGGER
Dynamic Function
PROTECTION SECTION
Over Voltage Protection
VFB(OVP)
Maximum On Time of
tonp
Primary Side
(MAX)
Dec. 2011
Min
Rev. 1. 0
µA
6
5
2
6
3
0
7
4
%
%
%
110
150
200
µs
120
150
180
mV
7
8
9
V
14
18
30
µs
BCD Semiconductor Manufacturing Limited
5
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Typical Performance Characteristics
40
800
35
Source Current (mA)
Operating Current (µA)
700
600
500
400
300
30
25
200
100
10
15
20
25
20
10
30
15
20
Figure 4. Operating Current vs. Supply Voltage
30
Figure 5. Source Current vs. Supply Voltage
500
5.0
4.5
Operating Current (µA)
Minimal Operating Voltage (V)
25
Supply Voltage (V)
Supply Voltage (V)
4.0
3.5
3.0
450
400
350
2.5
2.0
-40
-20
0
20
40
60
80
100
120
300
-40
140
-20
0
20
40
60
80
100
120
140
o
Ambient Temperature ( C)
o
Ambient Temperature ( C)
Figure 7. Operating Current vs.
Ambient Temperature
Figure 6. Minimal Operating Voltage vs.
Ambient Temperature
Dec. 2011
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
6
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Typical Performance Characteristics (Continued)
18
2.0
17
Start-up Voltage (V)
Start-up Current (µA)
1.5
1.0
0.5
0.0
-40
16
15
14
-20
0
20
40
60
80
100
120
13
-40
140
-20
0
20
40
60
80
100
120
140
o
Ambient Temperature ( C)
o
Ambient Temperature ( C)
Figure 8. Start-up Current vs. Ambient Temperature
Figure 9. Start-up Voltage vs. Ambient Temperature
30
2.00
Source Current (mA)
FB Input Resistance (MΩ)
28
1.75
1.50
26
24
1.25
22
1.00
-40
-20
0
20
40
60
80
100
120
20
-40
140
0
20
40
60
80
100
120
140
Ambient Temperature ( C)
Figure 11. Source Current
vs. Ambient Temperature
Figure 10. FB Input Resistance
vs. Ambient Temperature
Dec. 2011
-20
o
o
Ambient Temperature ( C)
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
7
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Typical Performance Characteristics (Continued)
155
575
Delay Time (µs)
Current Sense Voltage (mV)
600
550
150
145
525
500
-40
-20
0
20
40
60
80
100
120
140
-20
140
-10
0
20
30
40
50
60
70
80
o
Ambient Temperature ( C)
o
Ambient Temperature ( C)
Figure 13. Delay Time vs. Ambient Temperature
Figure 12. Current Sense Voltage vs.
Ambient Temperature
600
19.0
18.5
575
18.0
LEB (ns)
Primary Side Maximum On Time (µs)
10
17.5
550
17.0
525
16.5
16.0
-40
-20
0
20
40
60
80
100
120
500
-40
140
0
20
40
60
80
100
120
140
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 15. LEB vs. Ambient Temperature
Figure 14. Primary Side Maximum On Time
vs. Ambient Temperature
Dec. 2011
-20
o
o
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
8
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Typical Performance Characteristics (Continued)
9
Line Compensation Current (µA)
4
Feedback Voltage (V)
3.9
3.8
3.7
3.6
3.5
10
15
20
25
7
6
-40
30
-20
0
20
40
60
80
100
120
140
o
Ambient Temperature ( C)
Supply Voltage (V)
Figure 16. Feedback Voltage vs. Supply Voltage
Dec. 2011
8
Figure 17. Line Compensation Current vs.
Ambient Temperature
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
9
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Typical Application
Figure 18. 5V/1A Output for Battery Charger of Mobile Phone
(The AP4340 Is Used to Achieve Fast Dynamic Response)
Dec. 2011
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
10
Advance Datasheet
Low-Power Off-line Primary Side Regulation Controller
AP3772
Mechanical Dimensions
SOT-23-6
Unit: mm(inch)
0°
2.820(0.111)
8°
3.020(0.119)
0.300(0.012)
0.400(0.016)
5
4
2
3
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
2.650(0.104)
2.950(0.116)
6
0.200(0.008)
Pin 1 Mark
1
0.700(0.028)REF
0.950(0.037)TYP
0.000(0.000)
0.150(0.006)
1.800(0.071)
2.000(0.079)
0.100(0.004)
0.200(0.008)
0.900(0.035) 1.450(0.057)
MAX
1.300(0.051)
Dec. 2011
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
11
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