7. Key Parts Pin Assignment
7.1
IC802 (TOP246Y, Power Control IC)
Pin
Symbol
I/O
Description
1 C I
Control
2 L I
Line
Sense
3 X I
External
Current
Limit
4
S
O
Source of MOSFET(GND)
5 F I
Frequency
6
D
I
Drain of MOSFET
7.2
IC501 (OZ9910G, CCFL inverter controller IC)
Pin No.
Symbol
I/O
Description
1
NDRV4
O
Bottom MOSFET gate drive output in dual forward converter
2
PGND
High-current power ground
3
NDRV2
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 of set LPWM frequency
7 ADJ 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 VREF O
Reference voltage output
13 VIN I
Supply voltage for IC
14 HSB I
High side driver buffer output
15 PDRV3 O
Top MOSFET gate drive output in dual forward converter
16 PDRV1 O
Top MOSFET gate drive output in dual forward converter
7.3
U104 (TSU16AK)
Pin
Symbol
I/O
Description
1 LVBOM
O
B-Link Negative LVDS Differential Data Output
2 GND
Ground
3 BYPASS
For External Bypass Capacitor
4
NC
Not connected
5
NC
Not connected
6
BUSTYPE
IN
Low : Serial bus; High : Direct bus
7
NC
Not connected
8
NC
Not connected
9
NC
Not connected
10 GND
Ground
11 VDDP
O
Digital Output Power
12 NC
Not
connected
13
NC
Not connected
14
NC
Not connected
15
NC
Not connected
16 NC
Not
connected
17
NC
Not connected
18 VDDC
I
Digital Core Power
19 GND
Ground
10
ViewSonic Corporation
Co
nfidential
-
Do
Not
Copy
VA902/b
Содержание VA902B - 19" LCD Monitor
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