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DIOO Microcircuits DIO5151 Buck/Boost Charge Pump LED Driver

DIOO Microcircuits DIO5151 Buck/Boost Charge Pump LED Driver is ideal for powering high-brightness LEDs for camera flash applications. The charge pump can regulate two current levels for FLASH and TORCH modes. The DIOO Microcircuits DIO5151 automatically switches between step-up and step-down modes, so the LED current doesn't depend on the forward voltage. The driver also switches at 2MHz for the use of tiny components. The supply voltage ranges from 3V to 5.5V.

Features

  • Output current: DIO5151ED8 700mA, DIO5151CD10 1A
  • Up to 90% efficiency in torch mode
  • Adjustable FLASH mode current
  • 1× and 2× automatic modes for high efficiency
  • 3V to 5.5V input voltage range 
  • Minimum external components: no inductors
  • 2MHz high-frequency operation 
  • Low 47mV reference for low loss sensing
  • IQ < 1μA in shutdown
  • Built-in soft-start limits inrush current
  • Low input and output ripple and low EMI
  • Output overvoltage protection
  • Output open and output short protection
  • Overcurrent and overtemperature protection
  • DFN2x2.2-8 package

Applications

  • Cellular telephones
  • Digital still cameras
  • Mobile internet device
  • USB bus-powered chargers

Block Diagram

Block Diagram - DIOO Microcircuits DIO5151 Buck/Boost Charge Pump LED Driver
Opublikowano: 2016-07-27 | Zaktualizowano: 2022-03-11