Read Sharp GX-BT3 (serv.man4) Service Manual online
GX-BT7
4 – 8
IC604 VHLED1642GW-1 : LED DRIVER IC (1/1)
Pin description
Name and function
Symbol
Pin
Ground terminal
Serial Data Input terminal
Clock input terminal
Latch input terminal
Output terminals
Clock input for PWM counter
Serial Data Output terminal
Terminal for external resistor for constant current
Serial Data Input terminal
Clock input terminal
Latch input terminal
Output terminals
Clock input for PWM counter
Serial Data Output terminal
Terminal for external resistor for constant current
programming
Supply voltage terminal
Figure 4-5: Pin Configuration
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
23
22
21
20
19
18
17
16
15
14
13
14
13
1
2
3
4
2
3
4
5 to 20
21
22
22
23
24
GND
SDI
CLK
LE
OUT0-OUT15
PWCLK
SDO
R-EXT
VDD
GND
SDI
CLK
LE
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
VDD
R-EXT
SDO
PWCLK
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
R-EXT
SDO
PWCLK
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
Figure 4-6: Block Diagram
OUT0
PWCLK
SDO
OUT1
OUT2
OUT14
OUT15
Control Logic &
Data Registers
16 output channels
Channels driver
Timing control
Turn ON/OFF
Gradual delay
Current gain
adjustment
R-EXT
GND
VDD
LE
CLK
SDI
Current
Ref
PWM
counter
UVLO
& POR
Configuration
register
Thermal
shutdown
Error
detection
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