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Service Manual
8.3 U950 (LD7575, stand by Power Controller )
Pin
Symbol
1
RT
2
COMP
3
CS
4
GND
5
OUT
6
VCC
7
NC
8
HV
8.4 U1 ( INL836, CCFL Inverter controller IC)
Pin
Symbol
1
SST_CMP
2
RT
3
GNDA
4
DRV2
5
DRV1
6
VDDA
7
VSEN_DIM
8
ISEN
8.5 U850 (SG6901 Main Power controller IC)
I/O
This pin is to program the switching
frequency
I
Voltage feedback pin,By connecting a
photo-coupler to close the control loop
and achieve the regulation
I
Current sence pin
O
PWM output ,Gate drive output to drive
the external MOSFET
I
Power supply
Unconnected pin
I
PWM output
I/O
I
Enable, soft start time and
compensation of current error amplifier
I
Timing capacitor to set operating
frequency
Ground
O
N MOSFET Driver output
O
N MOSFET Driver output
I
Supply voltage input
I
Voltage sense, input analog signal for
PWM driving control
I
Lamp current detection & control
29
Description
Description
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