LM27965SQ

更新时间： 2024-11-13 04:44:35

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
13页	729K
描述
Dual Display White LED Driver with I2C Compatible Brightness Control

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中文翻译

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LM27965SQ 数据手册

May 2006

LM27965

Dual Display White LED Driver with I2C Compatible

Brightness Control

General Description

Features

n 91% Peak LED Drive Efficiency

n No Inductor Required

The LM27965 is a highly integrated charge-pump-based

dual-display LED driver. The device can drive up to 9 LEDs

in parallel with a total output current of 180mA. Regulated

internal current sinks deliver excellent current and brightness

matching in all LEDs.

n 0.3% Current Matching

n Drives LEDs with up to 30mA per LED

n 180mA of total drive current

n I²C Compatible Brightness Control Interface

n Adaptive 1x - 3/2x Charge Pump

n Resistor-Programmable Current Settings

n External Chip RESET Pin

The LED driver current sinks are split into three indepen-

dently controlled groups. The primary group can beconfig-

urabled with 4 or 5 LEDs, for backlighting a larger main

display and the second group can be configured with 2 or 3

LEDs, for backlighing a smaller secondary display. An addi-

tional, independently controlled led driver is provided for

driving an indicator or general purpose LED. The LM27965

has an I²C compatible interface that allows the user to

independently control the brightness on each bank of LEDs.

n Extended Li-Ion Input: 2.7V to 5.5V

n Small low profile industry standard leadless package,

LLP 24 : (4mm x 4mm x 0.8mm)

n 25mm²total solution size

The device provides excellent efficiency without the use of

an inductor by operating the charge pump in a gain of 3/2, or Applications

in Pass-Mode. The proper gain for maintaining current regu-

lation is chosen based on LED forward voltage, so that

efficiency is maximized over the input voltage range.

n Mobile Phone Display Lighting

n PDA Backlighting

n General LED Lighting

The LM27965 is available in National’s small 24-pin Lead-

less Leadframe Package (LLP-24).

Typical Application Circuit

20155001

DS201550

www.national.com

12 3 4 5 6 7...13

中文翻译

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与LM27965SQ相关器件

型号	品牌	获取价格	描述	数据表
LM27965SQ/NOPB	TI	获取价格	具有 I2C 兼容亮度控制功能的双通道显示白光 LED 驱动器 \| RTW \| 24 \|
LM27965SQ-M	NSC	获取价格	Dual Display White LED Driver with I2C Compatible Brightness Control
LM27965SQ-M/NOPB	TI	获取价格	具有 I2C 兼容亮度控制功能的双通道显示白光 LED 驱动器 \| RTW \| 24
LM27965SQX	NSC	获取价格	Dual Display White LED Driver with I2C Compatible Brightness Control
LM27965SQX/NOPB	TI	获取价格	具有 I2C 兼容亮度控制功能的双通道显示白光 LED 驱动器 \| RTW \| 24 \|
LM27965SQX-M	NSC	获取价格	Dual Display White LED Driver with I2C Compatible Brightness Control
LM27966	NSC	获取价格	White LED Driver with I2C Compatible Interface
LM27966	TI	获取价格	具有 I2C 兼容接口的白光 LED 驱动器
LM27966SQ	NSC	获取价格	White LED Driver with I2C Compatible Interface
LM27966SQ/NOPB	TI	获取价格	具有 I2C 兼容接口的白光 LED 驱动器 \| RTW \| 24 \| -30 to 85