ViewSonic VA703b Service Manual page 21

OZ9938GN(IC801): The OZ9938 is high performance, cost-effective CCFL controller
designed for driving large-size LCD applications requiring 2 to 6 CCFLs.PWM
control, Has such functions as short-voltage protection, Over-voltage protection,
over-current protection and etc. The function of each pin and the circuit diagram
inside are as follows:
PIN Descriptions:
Pin Names
1 DRV1
2 VDDA
3 TIMER
4 DIM
5 ISEN
6 VSEN
7 OVPT
8 NC
9 NC
10 ENA
11 LCT
12 SSECMP
13 CT
14 GNDA
15 DRV2
16 PGND
ViewSonic Corporation
Drive output
Supply voltage input
Timing capacitor to set striking time and shutdown delay time
Analog dimming or Internal LPWM dimming or external PWM pulse
input for dimming function
Current sense feedback
Voltage sense feedback
Over-voltage/ over-current protection threshold setting pin
No connection
No connection
ON/OFF control of IC
Timing capacitor to set internal PWM dimming frequency and also a
pin for analog dimming selection
Capacitor for soft start time and loop compensation
Timing resistor and capacitor for operation and striking frequency
Ground for analog signals
Drive output
Ground for power paths
Confidential - Do Not Cop
Description
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VA703b/VA703m