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LM27961 - Dual-Display White

General Description

The LM27961 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 and 3 LEDs for a sub-display backlight.

Key Features

  • n Drives 4 Individual Common-Anode LEDs with up to 20mA each for a Main Display Backlight n Drives 3 Individual Common-Cathode LEDs with up to 20mA each for a Sub-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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Other Datasheets by National Semiconductor (now Texas Instruments)

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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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LM27961 Dual-Display White LED Driver with 3/2x Switched Capacitor Boost November 2004 LM27961 Dual-Display White LED Driver with 3/2x Switched Capacitor Boost General Description The LM27961 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 and 3 LEDs for a sub-display backlight. Regulated internal current sources deliver excellent current and brightness matching in www.DataSheet4U.com all LEDs. The LED driver current sources are split into two independently controlled groups. The primary group (Group A) can be used to backlight a main phone display with up to 4 LEDs. The low-side current drivers of Group A accommodate common-anode-type LEDs.