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LM27952 - white-LED Driver

General Description

The LM27952 is a switched capacitor white-LED driver capable of driving up to 4 LEDs with 30mA through each LED.

Its 4 tightly regulated current sinks ensure excellent LED current and brightness matching.

LED drive current is programmed by an external sense resistor.

Key Features

  • 1.
  • 2 Drives up to 4 LEDs with up to 30mA each.
  • Regulated current sources with 0.2%(typ. ) matching.
  • 3/2x, 1x Gain transition based on LED VF.
  • Peak Efficiency Over 85%.
  • Input Voltage Range: 3.0V to 5.5V.
  • PWM Brightness Control.
  • Very Small Solution Size - NO.

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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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LM27952 www.ti.com SNVS364B – MAY 2005 – REVISED MAY 2013 LM27952 White LED Adaptive 1.5X/1X Switched Capacitor Current Driver Check for Samples: LM27952 FEATURES 1 •2 Drives up to 4 LEDs with up to 30mA each • Regulated current sources with 0.2%(typ.) matching • 3/2x, 1x Gain transition based on LED VF • Peak Efficiency Over 85% • Input Voltage Range: 3.0V to 5.5V • PWM Brightness Control • Very Small Solution Size - NO INDUCTOR • Fixed 750kHz Switching Frequency • <1µA Shutdown Current • 14-pin WSON Package: 4.0mm X 3.0mm X 0.8mm APPLICATIONS • White LED Display Backlights • White LED Keypad Backlights • General Purpose LED Lighting DESCRIPTION The LM27952 is a switched capacitor white-LED driver capable of driving up to 4 LEDs with 30mA through each LED.