LM3354／LM2792 white LED driver circuit diagram

Published:2011/8/12 2:22:00 Author:Lucas | Keyword: white LED driver | From:SeekIC

Charge pump white LED driver circuit is shown as the chart. Figure 1 (a) is the LM3354 charge pump white LED driver circuit with voltage regulation output function, and it can output 4.1V stable voltage. LM3354 charge pump input voltage range is 2.5 ~ 5.5V, and the output voltage range can be chosen from nominal values. LM3354 is used as white LED driver, which can select 4.1V output voltage. LM3354 charge pump switching frequency is 1MHz, so you can use smaller-capacity switch capacitor; the maximum output current is 90mA, and it contains on-chip thermal protection circuit with quiescent current in 475μA, and the current is 5μA when the circuit is off.



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