JVC RX-DV31SL Service Manual page 60

6.37SI-8050JF-F1 (IC192) : Switching Regulator
• Pin layout
1 2 3 4 5
• Block diagram
6.38 SI-8090JF (IC193) : Switching regulator
• Block Diagram
Vin
ON/OFF
1-60 (No.22023)
Vin
1
PReg
ON/OFF
5
ON/OFF
Soft-
Start
OSC
compalater
GND
1
PReg
5
ON/OFF
Soft-
Start
Oscillator
• Pin function
Pin No. Pin function
1 Vin
2 SW out
3 GND
4 Vos
5 ON/OFF
Over current
protect
Lach &
RESET
DRIVER
Thermal
protect
error amp
Reference
voltage
3
Over-current
protection
Latch
Reset
&
Driver
+
Heating
-
protection
Comparator
Error amp
+
-
Standard
voltage
3
GND
SW OUT
2
Vos
4
2
SW OUT
VOS
4