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BCT3142
1.1A Buck/Boost Charge Pump LED Driver
BCT3142
1.1A Buck/Boost Charge Pump LED Driver
GENERAL DESCRIPTION
The BCT3142 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH and TORCH modes.
The BCT3142 incorporates a 1-wire interface to program the flash LED current at 8 levels and flash timeout at 2 leve.
The BCT3142 supports PWM dimming to adjust the LED brightness during torch application by simply providing a PWM signal to flash pin.
The BCT3142 automatically switches modes between step-up 2x and step-down 1x ensuring that LED current does not depend on the forward voltage. It switches at 1.9MHz, allowing the use of tiny components.