DD312 SITI [Silicon Touch Technology Inc.], DD312 Datasheet - Page 7

• Manufacturer Part Number: DD312
• Description: HIGH CONSTANT CURRENT LED DRIVER with ERROR DETECTION
• Manufacturer: SITI [Silicon Touch Technology Inc.]

Constant-Current Output
the REXT pin and GND. Varying the resistor value can adjust the current up to 1A. Notice that the
output current is a little increasing or decreasing until the device temperature and ambient
temperature are balance. The maximum power dissipation of the determined external resistor should
be large enough than the actual power consumption:
Approximate output current value can be calculated by following equation:
HIGH CONSTANT CURRENT LED DRIVER
Constant-current value of each output channel is set by an external resistor connected between
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC
新竹市科學園區展業一路 9 號 7 樓之 1
Tel：[phone]
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
1100
1000
900
800
700
600
500
400
300
200
100
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
0.0
0
Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
1
0.2
Fax：[phone]
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2
0.4
Output Current as a Function of REXT value
Output Current as a Function of Output Voltage
3
0.6
.
4
0.8
Vout (Volt)
REXT( Ω )
5
1.0
6
1.2
. 0
( 5
7
Version:A.001
V ×
)
1.4
Vout = 1.0 V
Iout
8
(
1.6
A
9
)
need to be considered.
1.8
10
11
2.0
Page 6
DD312