DM115B

點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage

Version:A.001

Page 10

Output Current vs. External Resistor

Iout ≈ 1.3V / Rext * 12.5

Output Current Performance vs. Output Voltage

Note: In order to obtain a good constant current output, a suitable output voltage is necessary. Users can get

related information about the minimum output voltage from the above graph.

0

10

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60

70

0

200

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800

1000 1200 1400 1600 1800

Rext (Ohm)

0

5

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45

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55

60

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5

Vout (V)