Datasheet > LP8501

LP8501

更新时间： 2024-11-06 05:42:35

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器
页数	文件大小	规格书
2页	120K
描述
Multi-Purpose 9-Output LED Driver

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中文翻译

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LP8501 数据手册

November 20, 2008

LP8501 PRODUCT BRIEF

Multi-Purpose 9-Output LED Driver

General Description

Features

The LP8501 is a LED driver with 9 outputs, designed to pro-

duce versatile lighting effects for mobile devices. The device

is equipped with an internal program memory, which allows

operation without processor control. Internal program mem-

ory is used by three independent program execution engines

to produce user defined lighting effects for the outputs.

Three independent program execution engines for user

defined programs with large SRAM memory for storing

lighting programs

■

9 programmable source (high side) driver outputs with

25.5 mA full-scale current, 8-bit current setting resolution

and 12-bit PWM control resolution

Flexible grouping possibility for all 9 outputs including

GPO into three groups with group PWM and Fade in/ Fade

out controls

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.)

Built-in LED test

■

Adaptive charge pump with 1x and 1.5x gain provides up

to 95% LED drive efficiency and with soft start and

overcurrent/short circuit protection

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, which allows pro-

gram execution start without I²C write.

Automatic power save mode; I_VDD= 10 µA (typ.)

Two wire, I²C-compatible, control interface

Small application circuit

■

Pin-configured LED powering for LEDs 1 to 6 and for LEDs

7 to 9

Solution area <18 mm²

The device requires only four small and low-cost ceramic ca-

pacitors. 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).

■

Applications

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

Fun lights and indicator lights

■

LED backlighting and color keypad lighting

Programmable current source

Haptic feedback driver and GPIO expander

■

Typical Application

30041901

300419

www.national.com

中文翻译

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与LP8501相关器件

型号	品牌	获取价格	描述	数据表
LP8501TME/NOPB	TI	获取价格	多功能 9 输出 LED 驱动器 \| YFQ \| 25 \| -30 to 85
LP8501TMX/NOPB	TI	获取价格	多功能 9 输出 LED 驱动器 \| YFQ \| 25 \| -30 to 85
LP8543	TI	获取价格	High-Voltage DC/DC Boost Converter With Integrated FET
LP8543SQ/NOPB	TI	获取价格	SMBus/I2C controlled WLED driver for Medium Sized LCD backlight 24-WQFN
LP8543SQE/NOPB	TI	获取价格	适用于中型 LCD 背光的 SMBus/I2C 控制型 WLED 驱动器 \| RTW \|
LP8543SQX	TI	获取价格	SMBus/I2C Controlled WLED Driver for Medium-Sized LCD Backlight
LP8543SQX/NOPB	TI	获取价格	适用于中型 LCD 背光的 SMBus/I2C 控制型 WLED 驱动器 \| RTW \|
LP8545	TI	获取价格	High-Efficiency LED Backlight Driver for Notebooks
LP8545SQ/NOPB	TI	获取价格	适用于笔记本电脑的六通道高效 LED 背光驱动器，具有灵活的外部/内部 FET 控制 \|
LP8545SQE/NOPB	TI	获取价格	Six channel high-efficiency LED backlight driver for notebooks with flexible ext/int FET c

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