DD331 SITI [Silicon Touch Technology Inc.], DD331 Datasheet - Page 7

• Manufacturer Part Number: DD331
• Description: 4-Channel Flexible LED Pre-Driver
• Manufacturer: SITI [Silicon Touch Technology Inc.]

Timing Diagram
ENG,ENR,ENB,ENW to GATER,GATEG,GATEB,GATEW
Constant-Current Output
an external resistor connected between the REXT(R, G, B, W) pin and GND individually.
Varying the resistor value can adjust the current. Notice that the output current is a little
increasing or decreasing until the device temperature and ambient temperature are
balance. Approximate output current value can be calculated by following equation:
GATER
GATEG
GATEB
GATEW
ENG
ENR
ENB
ENW
The constant-current value of each output channels is set by a N-type MOSFET and
Iout
M
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
High CONSTANT CURRENT LED DRIVERS
100
90
80
70
60
50
40
30
20
10
0
0
883.1
5
50%
967.2
10
50
Iout = 0.52 / Rext * M
t
pLH
990
20
t
50%
wEN
100
Rext (Ω)
10128
40
1044.6
Version:A.002
150
80
50%
1115.6
160
t
pHL
200
50%
1478.8
220
DD331
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