Electrical – Help reading IR LED datasheet


I want to run 5 Vishay TSUS5402 LEDs continuously, but I'm not sure what the voltage and current should be. The datasheet is here:


I can't really see on the datasheet anything about continuous use, only pulse. Thanks for any help

Best Answer

Figure 4 gives the information you require.

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Figure 4. For a current of 100 mA you can expect a forward voltage of about 1.35 V.

Note that \$ V_f \$ will have a spread. Design for current control, not voltage control.