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LP5521 - Programmable Three Channel LED Driver

Description

The LP5521 is a three channel LED driver designed to produce variety of lighting effects for mobile devices.

High efficiency charge pump enables LED driving over full Li-Ion battery voltage range.

The device has a program memory for creating variety of lighting sequences.

Features

  • Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency.
  • Charge pump with soft start and overcurrent/short circuit.
  • protection Low input ripple and EMI Very small solution size, no inductor or resistors required 200 nA typical shutdown current Automatic power save mode I2C compatible interface Independently programmable constant current outputs with 8-bit current setting and 8-bit.

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Datasheet preview – LP5521

Datasheet Details

Part number LP5521
Manufacturer National Semiconductor
File Size 363.13 KB
Description Programmable Three Channel LED Driver
Datasheet download datasheet LP5521 Datasheet
Additional preview pages of the LP5521 datasheet.

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Full PDF Text Transcription

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LP5521 Programmable Three Channel LED Driver June 2007 LP5521 Programmable Three Channel LED Driver General Description The LP5521 is a three channel LED driver designed to produce variety of lighting effects for mobile devices. High efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has been loaded, LP5521 can operate independently without processor control. www.DataSheet4U.com LP5521 maintains excellent efficiency over a wide operating range by automatically selecting proper charge pump gain based on LED forward voltage requirements. LP5521 is able to automatically enter power-save mode, when LED outputs are not active and thus lowering current consumption.
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