LP8501

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SNVS548B – SEPTEMBER 2008 – REVISED NOVEMBER 2008

LP8501 PRODUCT BRIEF Multi-Purpose 9-Output LED Driver

Check for Samples: LP8501

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FEATURES

•

(typ.)

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•

Three independent program execution engines

•

for user defined programs with large SRAM

memory for storing lighting programs

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Small application circuit

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9 programmable source (high side) driver

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Pin-configured LED powering for LEDs 1 to 6

outputs with 25.5 mA full-scale current, 8-bit

and for LEDs 7 to 9

current setting resolution and 12-bit PWM

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control resolution

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Flexible grouping possibility for all 9 outputs

APPLICATIONS

including GPO into three groups with group

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Fun lights and indicator lights

PWM and Fade in/ Fade out controls

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LED backlighting and color keypad lighting

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Built-in LED test

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Programmable current source

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Adaptive charge pump with 1x and 1.5x gain

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Haptic feedback driver and GPIO expander

provides up to 95% LED drive efficiency and

with soft start and overcurrent/short circuit

protection

DESCRIPTION

The LP8501 is a LED driver with 9 outputs, designed to produce versatile lighting effects for mobile devices. The

device is equipped with an internal program memory, which allows operation without processor control. Internal

program memory is used by three independent program execution engines to produce user defined lighting

effects for the outputs.

A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The excellent efficiency

over a wide operating range is achieved by autonomously selecting the best charge pump gain based on LED

forward voltage requirements. LP8501 is able to automatically enter power-save mode when LED outputs are not

active, thus lowering idle current consumption down to 10 µA (typ.)

The device has a flexible General Purpose Output (GPO), which can be used for example as a digital control pin

for other devices. INT pin (interrupt function), which can be used to notify processor. Trigger input interface,

The device requires only four small and low-cost ceramic capacitors. The LP8501 is available in a tiny 25–bump

2.27 mm x 2.27 mm x 0.60 mm micro SMD package (0.4 mm pitch).

Notice: This document is not a full datasheet. For more information regarding this product or to order

samples,

please

contact

your

local

National

Semiconductor

sales

office

or

visit

http://www.national.com/support/dir.html

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.