Semtech Corporation
RIDE THROUGH MODE IN LED BACKLIGHT DRIVER FOR AUTOMOTIVE IDLE STOP AND COLD CRANK OPERATION

Abstract:

A circuit comprising a first regulator coupled to a voltage input, a second regulator coupled to a voltage output and a switch coupled to the first regulator and the second regulator, wherein the switch is configured to provide voltage to a load from the voltage input when the voltage input is greater than a first predetermined voltage, and to provide voltage to the load from the voltage output when the voltage input is lower than a second predetermined voltage.