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L5100 - WHITE LED STEP-UP CONVERTER

General Description

The UTC L5100 is a STEP-UP DC/DC Converter and designed for driving white LEDs with a constant current.

It can drive several LEDs in series by a Li-Ion cell.

UTC L5100 switches at a high frequency 1.2MHz, so it can allow the use of tiny external components.

Key Features

  • Inherently Matched LED Current.
  • High Efficiency: 83% Typical.
  • Drives Up to Four LEDs from a 3.2V Supply.
  • Drives Up to Six LEDs from a 5V Supply.
  • 36V Rugged Bipolar Switch.
  • 1.2MHz Switching Frequency.
  • Uses Tiny 1mm Tall Inductors.
  • Output Capacitor can be Small to only 0.22μF.

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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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UNISONIC TECHNOLOGIES CO., LTD L5100 LINEAR INTEGRATED CIRCUIT WHITE LED STEP-UP CONVERTER  DESCRIPTION The UTC L5100 is a STEP-UP DC/DC Converter and designed for driving white LEDs with a constant current. It can drive several LEDs in series by a Li-Ion cell. UTC L5100 switches at a high frequency 1.2MHz, so it can allow the use of tiny external components. The output capacitor can be as small as 0.22μF; saving space and cost compare with alternative other solutions. The low 95mV feedback voltage minimizes power loss in the current setting resistor can have better efficiency.  FEATURES * Inherently Matched LED Current * High Efficiency: 83% Typical * Drives Up to Four LEDs from a 3.2V Supply * Drives Up to Six LEDs from a 5V Supply * 36V Rugged Bipolar Switch * 1.