Datasheet > LP5520

LP5520

更新时间： 2024-02-07 11:52:59

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
34页	1023K
描述
RGB Backlight LED Driver

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中文翻译

获取价格

数据手册

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LP5520 数据手册

May 2007

LP5520

RGB Backlight LED Driver

General Description

Features

The LP5520 is an RGB backlight LED driver for small format

color LCDs. RGB backlight enables better colors on the dis-

play and power savings compared with white LED backlight.

LP5520 offers small and simple driver solution without need

for optical feedback. Calibration in display module production

can be done in one temperature. LP5520 produces true white

light over wide temperature range. Three independent LED

drivers have accurate programmable current sinks and PWM

modulation control. Using internal calibration memory and

external temperature sensor, the RGB LED currents are ad-

justed for perfect white balance independent of the brightness

setting or temperature. The user programmable calibration

memory has intensity vs. temperature data for each color.

This white balance calibration data can be programmed to the

memory on the production line of a backlight module.

Temperature compensated LED intensity and color

Individual calibration coefficients for each color

Color accuracy ΔX and ΔY ≤ 0.003

12 bit ADC for measurement of 2 sensors

Adjustable current outputs for R, G and B LED

0.2% typical LED output current matching

PWM control inputs for each color

■

SPI and I²C compatible interface

Stand-alone mode with 1 wire control

Sequential mode for one color at a time

Magnetic high efficiency boost converter

Programmable output voltage from 5V to 20V

Adaptive output voltage control option

< 2 µA typical shutdown current

The device has a magnetic boost converter that creates up to

20V LED supply voltage from the battery voltage. The output

can be set at 1V step from 5V to 20V. In adaptive mode the

circuit automatically adjusts the output voltage to minimum

sufficient level for lowest power consumption.

MicroSMD-25 package, 2.77 × 2.59 × 0.6mm

Applications

Temperature is measured using an external temperature sen-

sor placed close to the LEDs. The second ADC input can be

used e.g. for ambient light measurement.

Color LCD display backlighting

■

LED lighting applications

Non-linear temperature compensation

LP5520 is available in 25 pin microSMD™ package.

Ambient light compensation

Typical Application

20186107

201861

www.national.com

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中文翻译

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与LP5520相关器件

型号	品牌	获取价格	描述	数据表
LP5520TL	NSC	获取价格	RGB Backlight LED Driver
LP5520TL/NOPB	TI	获取价格	RGB 背光 LED 驱动器 \| YZR \| 25 \| -30 to 85
LP5520TLX	NSC	获取价格	RGB Backlight LED Driver
LP5520TLX/NOPB	TI	获取价格	RGB 背光 LED 驱动器 \| YZR \| 25 \| -30 to 85
LP5521	NSC	获取价格	Programmable Three Channel LED Driver
LP5521	TI	获取价格	具有内部程序存储器和集成电荷泵的 3 通道 RGB/白色 LED 驱动器
LP5521TM	NSC	获取价格	Programmable Three Channel LED Driver
LP5521TM/NOPB	NSC	获取价格	IC LED DISPLAY DRIVER, PBGA20, 2.10 X 1.70 MM, 0.60 MM HEIGHT, 0.40 MM PITCH, ROHS COMPLIA
LP5521TM/NOPB	TI	获取价格	具有内部程序存储器和集成电荷泵的 3 通道 RGB/白色 LED 驱动器 \| YFQ \|
LP5521TMX	NSC	获取价格	Programmable Three Channel LED Driver

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