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LM27953 - White LED Driver

General Description

The LM27953 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting.

It is intended to drive 4 LEDs for a main phone display backlight.

Regulated internal current sources deliver excellent current and brightness matching in all LEDs.

Key Features

  • n Drives 4 Individual Common-Anode LEDs with up to 20mA each for a Main Display Backlight n Independent Resistor-Programmable Current Setting n Excellent Current and Brightness Matching n High-Efficiency 3/2x Charge Pump n Extended Li-Ion Input: 2.7V to 5.5V n PWM Brightness Control: 100Hz - 1kHz n 18-bump Thin Micro SMD Package: (2.1mm x 2.4mm x 0.6mm).

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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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November 2004 www.DataSheet4U.com LM27953 White LED Driver with Four LED Current Sinks and 3/2x Switched Capacitor Boost LM27953 White LED Driver with Four LED Current Sinks and 3/2x Switched Capacitor Boost General Description The LM27953 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting. It is intended to drive 4 LEDs for a main phone display backlight. Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The LED driver current sinks can be used to backlight a main phone display with up to 4 LEDs. The low-side current drivers accommodate common-anode-type LEDs.