BCD AP3765K6TR-G1 Low-power off-line primary side regulation controller Datasheet

Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
General Description
Features
The AP3765 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.
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The AP3765 provides accurate constant voltage, constant current (CV/CC) regulation while removing the
opto-coupler and secondary control circuitry. It also
eliminates the need of loop compensation circuitry
while maintaining stability. The AP3765 achieves
excellent regulation and high average efficiency, yet
meets the requirement for no-load consumption less
than 30mW.
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The AP3765 is available in SOT-23-6 package.
AP3765
Primary Side Control for Rectangular Constant
Current and Constant Voltage Output
Sub-microampere Start-up Current
30mW No-load Input Power Feasible
Tight CV Regulation Performance
Eliminates Opto-coupler and Secondary CV/CC
Control Circuitry
Eliminates Control Loop Compensation Circuitry
Flyback Topology in DCM Operation
Random Frequency Modulation to Reduce
System EMI
Built-in Soft Start
Open Feedback Protection
Short Circuit Protection
SOT-23-6 Package
Applications
·
·
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Adapters/Chargers for Cell/Cordless Phones,
PDAs, MP3 and Other Portable Apparatus
LED Drivers
Standby and Auxiliary Power Supplies
SOT-23-6
Figure 1. Package Type of AP3765
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3765
Pin Configuration
K6 Package
(SOT-23-6)
Pin 1 Dot by Marking
OUT
1
6
FB
GND
2
5
GND
VCC
3
4
CS
Figure 2. Pin Configuration of AP3765 (Top View)
Pin Description
Pin Number
Pin Name
Function
1
OUT
This pin drives the base of external power NPN switch
2, 5
GND
Ground
3
VCC
Supply voltage
4
CS
The primary current sense
6
FB
The voltage feedback from the auxiliary winding
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3765
Functional Block Diagram
VCC
3
FB
6
0.1V
COMP
pfm
Tonsec
Detector
Regulator
&
Bias
Tons
UVLO
OCkP
EA
4.0V
CV_ctrl
R
Constant Voltage Control
Q
pfm
Driver
1
OUT
S
CS
4
Peak Current Control & LEB
Tons
Constant Current Control
R
Q
CC_ctrl
2, 5
GND
S
Figure 3. Functional Block Diagram of AP3765
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3765
Ordering Information
AP3765
-
Circuit Type
G1: Green
Package
K6: SOT-23-6
TR: Tape and Reel
Package
Temperature Range
SOT-23-6
-40 to 85oC
Part Number
AP3765K6TR-G1
Marking ID
GBB
Packing Type
Tape & Reel
BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.
Absolute Maximum Ratings (Note 1)
Parameter
Value
Unit
Supply Voltage VCC
-0.3 to 36
V
Voltage at CS, OUT to GND
-0.3 to 7
V
FB Input
-40 to 10
V
Internally limited
A
Output Current at OUT
Operating Junction Temperature
150
Storage Temperature
o
-65 to 150
C
oC
Lead Temperature (Soldering, 10s)
300
Thermal Resistance Junction-to-Ambient
250
ESD (Machine Model)
200
V
ESD (Human Body Model)
2000
V
o
o
C
C/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.
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3765
Electrical Characteristics
(VCC=15V, TA=25oC, unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
VTH (ST)
16
18.5
21
V
VOPR(min)
7.2
9
10.2
V
0.6
µA
200
320
µA
24
30
36
VCS
455
510
545
mV
VCS(PRE)
365
410
455
mV
UVLO SECTION
Start-up Threshold
Minimal Operating Voltage
STANDBY CURRENT SECTION
IST
Start-up Current
Operating Current
ICC(OPR)
VCC = VTH (ST)-0.5V,
Before start-up
Static
DRIVE OUTPUT SECTION
OUT Maximum Current
Sink
Source
50
IOUT
mA
CURRENT SENSE SECTION
Current Sense Threshold
Pre-Current Sense
Leading Edge Blanking
750
ns
FEEDBACK INPUT SECTION
Feedback
Current
Pin
Input
Feedback Threshold
Leakage
IFB
VFB=4V
VFB
Feb. 2010 Rev. 1. 0
2.0
2.5
3.1
µA
3.89
3.95
4.01
V
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3765
Typical Performance Characteristics
10.5
Minimal Operating Voltage (V)
21
Start-up Voltage (V)
20
19
18
17
16
-40
-20
0
20
40
60
80
100
10.0
9.5
9.0
8.5
8.0
7.5
-40
120
-20
0
o
20
40
60
80
100
120
o
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 5. Mininal Operating Voltage vs.
Ambient Temperature
Figure 4. Start-up Voltage vs. Ambient Temperature
6
300
280
5
240
4
220
IFB (µA)
Operating Current (µA)
260
200
3
180
2
160
140
1
120
100
-40
-20
0
20
40
60
80
100
0
-40
120
-20
0
20
40
60
80
100
120
o
o
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 6. Operating Current vs. Ambient Temperature
Figure 7. IFB vs. Ambient Temperature
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3765
Typical Application
D2
T1
V O+
+
C1
R1
+
C2
R5
D1
V
D3
R2
VCC
OUT
R3
CS
Ns
C4 +
VO-
N FB
V
Q1
AP3765
R4
C3
NP
R6
FB
GND
R7
Rs
Figure 8. 5V/700mA Output for Battery Charger of Mobile Phone
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
7
Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3765
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
0.300(0.012)
0.600(0.024)
4
1.500(0.059)
1.700(0.067)
2.650(0.104)
2.950(0.116)
6
0.200(0.008)
Pin 1 Dot by Marking
1
2
3
0.700(0.028)REF
0.950(0.037)TYP
0.000(0.000)
0.100(0.004)
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)
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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