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AP3902 Datasheet(PDF) 3 Page - BCD Semiconductor Manufacturing Limited

Part # AP3902
Description  LOW POWER PWM SWITCH FOR OFF-LINE SMPS
PDF  9 Pages
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Manufacturer  BCDSEMI [BCD Semiconductor Manufacturing Limited]
Direct Link  http://www.bcdsemi.com
Logo BCDSEMI - BCD Semiconductor Manufacturing Limited

AP3902 Datasheet(HTML) 3 Page - BCD Semiconductor Manufacturing Limited

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LOW POWER PWM SWITCH FOR OFF-LINE SMPS
AP3902
Data Sheet
3
BCD Semiconductor Manufacturing Limited
Sep. 2008 Rev. 1.0
Functional Block Diagram
Figure 3. Functional Block Diagram of AP3902
VCC
GND
B
VS
C
VA
PWM Logic
Start-
up Current
Source
Bias
OSC
Discharge
Logic
V
REF
FB
PWM
Comparator
+
-
UVLO
+
-
+
-
Driver
V
REF
V
REF
(1.2 V)
(1.2 V)
Short Circuit
Protection
-
Discharge
Comparator
Slope
Compensation
NPN
Transistor
Emitter
OUT
4
5, 6
1
2
3
8



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