Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
Functional Block Diagram
AP3768
6
FB
UVLO
0.1V
COMP
pfm
OVP
&
OCkP
Tonsec
Detector
EA
VFB
Constant Voltage
Control
1
CS
Peak Voltage
Control &LEB
VCC
2
Tons
Regulator
&
Bias
UVLO
8
BIAS
RQ
S
CV_ctrl
pfm Driver 3
OUT
Tons
Constant Current
Control
Cable
Compensation
RQ
CC_ctrl
S
5
CPC
7
CPR
Figure 3. Functional Block Diagram of AP3768
4
GND
Aug. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
3