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MIC2291 - 1.2A PWM Boost Regulator Photo Flash LED Driver

General Description

The MIC2291 is a 1.2MHz Pulse Width Modulation (PWM), boost-switching regulator that is optimized for high-current, white LED photo flash applications.

Key Features

  • 2.5V to 10V input voltage Output voltage up to 34V 1.2A switch current 1.2MHz PWM operation 95mV feedback voltage Overvoltage protection (OVP).
  • Options for 15V and 34V Stable with ceramic capacitors.

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Datasheet Details

Part number MIC2291
Manufacturer Micrel Semiconductor
File Size 107.45 KB
Description 1.2A PWM Boost Regulator Photo Flash LED Driver
Datasheet download datasheet MIC2291 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MIC2291 Micrel MIC2291 1.2A PWM Boost Regulator Photo Flash LED Driver General Description The MIC2291 is a 1.2MHz Pulse Width Modulation (PWM), boost-switching regulator that is optimized for high-current, white LED photo flash applications. With a guaranteed switch current of 1.2A, the MIC2291 easily drives a string of 3 white LEDs in series at 100mA, ensuring a high level of brightness and eliminating several ballast resistors. The MIC2291 implements a constant frequency, 1.2MHz PWM control scheme. The high frequency PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM scheme, in contrast to variable frequency topologies, is much lower noise and input ripple injected back to the battery source.