Str-A6252 - LG MBD-D102X Service Manual

10. STR-A6252

10-1. BLOCK DIAGRAM
VCC 5
OVP
+
-
32V
TSD
140℃ typ
PWM OSC
46~54kHz
GND 3
10-2. PIN FUNCTION
Terminal No. SYMBOL
1 Source/O.C.P
2 FM/SS
3 GND
4 FB/CC/OLP
5 Vcc
7
D
8
-
R
10µs
+
7.2V
S Q
Delay
R Q
S
PWM
Latch
BURST
Noize
-
Reducer
+
3R
0.52V
R
-
+
-
FB/OCP
0.75V
Description
Source/O.C.P terminal
FM terminal
Ground terminal
FB/CC/OLP terminal
Power supply terminal
Drain terminal
UVLO
Internal +
-
Bias
14.3V/10V
Q
R
S
Timer
tFMx128
CV/CC
Control
Soft
Start
R
S
Q
Blanking
(350ns)
11
µA
22
µA
+
-
4.5V/3.6V
MOSFET Source/Over current protect
Capacitor connection terminal for frequency jitter and soft start
Ground
Input of constant voltage signal /
constant current operation control signal /
over load protection signal
Input of power supply for control circuit
MOSFET drain / Input of Startup current
3-44
8 D
1.2mA
Drive
7.1V 10V
1 S/OCP
310 18
µA µA
4 FB/CC
-
+
8.6V
Over Load
protection
2 FM/SS
Frequency
Modulation
Functions
(7, 8Pin)
/OLP