HV9861A Datasheet, Supertex

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* Fast average current control Programmable constant off-time switching PWM / linear dimming input Output .

to improve the LED current accuracy and regulation. Applications
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The HV9861A is a patented, average-mode, constant current control LED driver IC operating in a constant off-time mode. Unlike the HV9910B, this control IC does not produce a peak-to-average error, and therefore greatly improves the accuracy, line an.