LM3842 driver equivalent, step-down constant current led driver.
n n n n n n n n n n n n Efficiency up to 93% 180 μA(TYP.) Quiescent Current Output Current: Up to 1A Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start .
n 3AA or 4AA Batteries Powered Flashlight n 1 Cell Li-Ion Battery Powered Flashlight
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Typic.
The LM3842 is a step-down constant current LED driver. When the input voltage down to lower than LED forward voltage, then LM3842 run into LDO mode. The LM3842 supports a range of input voltages from 2.5V to 6.0V, allowing the use of a single Li+/Li-.
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