LED driver chip for car reading light and state control method thereof
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United States of America Patent
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Nov 14, 2017
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N/A
app pub date -
Dec 5, 2016
filing date -
Jan 13, 2016
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Abstract
An LED driver chip for a car reading light and a state control method thereof are provided. The LED driver chip includes a state machine control circuit module, a state machine output logic module, a current on/off control logic circuit module, and a current source module. An OUT pin of the LED driver chip is connected with an LED. The LED driver chip determines the next state of LED current according to a driver chip PWM input signal, an EN pin low lever pulse input signal, and a present LED state, enabling the LED to switch among nine different states.
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