Index DW9937S Service Manual page 54

FSDM07652RB
Internal Block Diagram
N.C 5
0.5/0.7V
+
-
Vcc Vref
I
delay
FB 4
Soft start
V
SD
Vcc
Vovp
TSD
Vcc
3
8V/12V
I
PWM
FB
2.5R
R
Vcc good
Figure 2. Functional Block Diagram of FSDM07652RB
Vstr
6
I
start
Vref
Vcc good
OSC
S Q
R Q
S Q
R Q
52
Drain
1
Internal
Bias
Gate
driver
LEB
2 GND
V
CL