Data Sheet
CURRENT MODE PWM CONTROLLER
AP384XC
Functional Block Diagram
V
CC
7
5
34V
UVLO
5V
REF
S/R
V
8
REF
GND
INTERNAL
BIAS
2.50V
VREF
GOOD
LOGIC
OUTPUT
6
4
OSC
T
R /C
T
T
(Note)
OVER TEMP
PROTECT
ERROR
AMP
S
R
2R
2
1
V
PWN
LATCH
FB
1V
R
COMP
CURRENT
SENSE
COMPARATOR
Note: Toggle flip-flop used
for 3844C/45C only
3
I
SENSE
Figure 3. Functional Block Diagram of AP3842C/3C/4C/5C
BCD Semiconductor Manufacturing Limited
Sep. 2006 Rev. 1. 1
3