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DM632C 数据表(PDF) 10 Page - Silicon Touch Technology Inc.

部件名 DM632C
功能描述  Maximum output voltage: 17V
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制造商  SITI [Silicon Touch Technology Inc.]
网页  http://www.siti.com.tw
标志 SITI - Silicon Touch Technology Inc.

DM632C 数据表(HTML) 10 Page - Silicon Touch Technology Inc.

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16-channel 16-bit PWM Constant Current LED Driver
Version:A.001
Page 9
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
DM632C
Constant-Current Output
Constant-current value (Iout
*1)of each output channel is set by an external resistor connected
between the REXT pin and GND. The current scale ranging can be adjusted from 5mA to 90mA by
varying the resistor value. The reference voltage of REXT terminal (Vrext) is approximately 1.23V.
The output current value is calculated by the following equation:
Iout(mA)
5
10
20
30
40
50
60
70
80
90
M
50.86
48.60
48.39
47.66
46.97
46.13
44.74
43.94
43.20
42.24
Output Current as a Functiono Rext value
0
10
20
30
40
50
60
70
80
90
100
01
234
5678
9
10
11
12
13
Rext(KΩ)
Output Current as a Function of Output Voltage
0
10
20
30
40
50
60
70
80
90
100
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
Vout (V)
In order to obtain a good performance of constant-current output, a suitable output voltage is
necessary. Users can get related information about the minimum output voltage above.
*1 Iout is typical current value setting under 100% PWM duty cycle.
Iout (mA) ~
Vrext (V)
Rrext (KΩ)
× M


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