LC40159 white LED driver circuit diagram

Published:2011/8/12 1:13:00 Author:Lucas | Keyword: white LED driver | From:SeekIC

VIN side in the figure shows the input voltage of the power supply, and input voltage range is 2.7 ~ 5.5V; VREF side is the internal reference voltage, SD side is the enable signal input end, when it is input H signal, LED begins to glow; when it is input L signal, LED turns off. RSET side have set the peripheral resistor which can generate a constant current. VOUT terminal is the output end of the boost circuit, and it is connected with white LED cathode, because the converter output voltage VOUT can be synchronized with the oscillator circuit fluctuates, the VOUT terminal can be connected output capacitor in parallel to suppress fluctuations of the output voltage.



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