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LM27951 Datasheet White LED Adaptive 1.5X/1X Switched Capacitor Current Driver

Manufacturer: National Semiconductor (now Texas Instruments)

General Description

The LM27951 is a switched capacitor white-LED driver capable of driving up to 4 LEDs with 30mA through each LED.

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

LED drive current is programmed by an external sense resistor.

Overview

November 2005 www.DataSheet4U.com LM27951 White LED Adaptive 1.5X/1X Switched Capacitor Current Driver LM27951 White LED Adaptive 1.

Key Features

  • n n n n n n n n n n 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.