點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM163
8x3-CHANNEL CONSTANT CURRENT LED DRIVERS
Version: A.004
Page
6
Pin Description
PIN NAME
FUNCTION
QFP pin number QFN pin number
VDDH (R)
VDDH (G)
VDDH (B)
Output protection pins.
They could be connected independently
or to LED supplies (VLED).
31
32
33
28
29
30
VDD
Power supply terminal.
34
31
VSS
Ground terminal.
2
3
VSS_DR
Driver ground
10, 11, 22, 23
Thermal pad
SIN
Serial input for grayscale data.
1
2
SOUT
Serial output for grayscale data.
35
32
DCK
Synchronous clock input for serial data
transfer. The input data of SIN is
transferred at rising edges of DCK.
41
38
SELBK
If SELBK is H, shift-in date would be
stored in the 8-bit BANK 1.
If SELBK is L, shift-in date would be
stored in the 6-bit BANK 0.
38
35
LAT_B
When LAT_B converts from H to L,
grayscale data in both shift register
banks are latched.
40
37
GCK
Clock input for PWM operation.
39
36
REXT(R)
REXT(G)
REXT(B)
External resistor connected between
REXT and GND for driver current setting.
REXT(R) controls outputs OUT0, 3, 6, 9,
12, 15, 18, 21.
REXT(G) controls outputs OUT1, 4, 7, 10,
13, 16, 19, 22.
REXT(B) controls outputs OUT2, 5, 8, 11,
14, 17, 20, 23.
44
43
42
1
40
39
IOUT0~23 LED driver outputs.
3, 4, 5, 6, 7, 8, 9,
12, 13, 14, 15,16,
17, 18, 19, 20,21,
24, 25, 26, 27,28,
29, 30
4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15,
16, 17, 18, 19, 20,
21, 22, 23, 24, 25,
26, 27
EN_B
Input terminal of output enable. All
outputs are OFF when EN_B is H.
37
34
RST_B
The IC is initialized when RST_B low.
There is an internal pull-up on this pin.
This pin couldn’t be floating. Before using
the IC, it must be reset first. If each
channel is assigned to drive multiple
LEDs, IC should be reset before each
LED data latch to prevent from flashing.
36
33
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