ViewSonic VA2016W Service Manual - Page 41

ViewSonic Corporation, U701 Audio amplifierTDA7496L, SYMBOL, DESCRIPTION, 4. IC501 OZ9910G - driver

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6.3 U701 (Audio amplifier)TDA7496L SYMBOL PIN DESCRIPTION GND 1 Ground GND 2 Ground GND 3 Ground Signal L 4 Signal input left VAR out 5 VAR output VOLUME 6 DC volume control VAR out 7 VAR output NC 8 Not connected Signal R 9 Signal input right SVR Supply voltage 10 rejection STBY 11 Standby MUTE 12 Sound mute GND 13 Ground OUTR 14 Audio output right VS 15 Power supply VS 16 Power supply OUTL 17 Audio output left GND 18 Ground GND 19 Ground GND 20 Ground 6.4. IC501 (OZ9910G, CCFL Inverter controller IC) Pin Symbol 1 NDRV2 I/O Description O Bottom MOSFET gate drive output in dual forward converter 2 PGND High-current power ground 3 NDRV1 O Bottom MOSFET gate drive output in dual forward converter 4 GNDA Low-current signal ground 5 CT I Timing capacitor of high frequency oscillator 6 LCT I Timing capacitor to set LPWM frequency 7 DIM I Control command input -- DC 8 ENA I Enable input 9 VSEN I Voltage sense feedback 10 CMP_SST I Soft start and loop compensation capacitor 11 ISEN I Current sense feedback 12 V5000 O Reference voltage output 13 VIN I Supply voltage for IC 14 HSB I High side driver buffer output 15 PDRV1 O Top MOSFET gate drive output in dual forward converter 16 PDRV2 O Top MOSFET gate drive output in dual forward converter ViewSonic Corporation 38 Confidential - Do Not Copy VA2016w-2

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38
ViewSonic Corporation
Confidential - Do Not Copy
VA2016w-2
6.3
U701 (Audio amplifier)TDA7496L
SYMBOL
PIN
DESCRIPTION
GND
1
Ground
GND
2
Ground
GND
3
Ground
Signal L
4
Signal input left
VAR out
5
VAR output
VOLUME
6
DC volume control
VAR out
7
VAR output
NC
8
Not connected
Signal R
9
Signal input right
SVR
10
Supply voltage
rejection
STBY
11
Standby
MUTE
12
Sound mute
GND
13
Ground
OUTR
14
Audio output right
VS
15
Power supply
VS
16
Power supply
OUTL
17
Audio output left
GND
18
Ground
GND
19
Ground
GND
20
Ground
6.4. IC501 (OZ9910G, CCFL Inverter controller IC)
Pin
Symbol
I/O
Description
1
NDRV2
O
Bottom MOSFET gate drive output in dual forward converter
2
PGND
High-current power ground
3
NDRV1
O
Bottom MOSFET gate drive output in dual forward converter
4
GNDA
Low-current signal ground
5
CT
I
Timing capacitor of high frequency oscillator
6
LCT
I
Timing capacitor to set LPWM frequency
7
DIM
I
Control command input -- DC
8
ENA
I
Enable input
9
VSEN
I
Voltage sense feedback
10
CMP_SST
I
Soft start and loop compensation capacitor
11
ISEN
I
Current sense feedback
12
V5000
O
Reference voltage output
13
VIN
I
Supply voltage for IC
14
HSB
I
High side driver buffer output
15
PDRV1
O
Top MOSFET gate drive output in dual forward converter
16
PDRV2
O
Top MOSFET gate drive output in dual forward converter