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LM27951SDXSLASHNOPB中文资料德州仪器数据手册PDF规格书

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厂商型号

LM27951SDXSLASHNOPB

功能描述

LM27951 White LED Adaptive 1.5×/1× Switched-Capacitor Current Driver

丝印标识

D006B

封装外壳

WSON

文件大小

928.43 Kbytes

页面数量

19

生产厂商

TI

中文名称

德州仪器

网址

网址

数据手册

下载地址一下载地址二到原厂下载

更新时间

2025-10-4 15:40:00

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LM27951SDXSLASHNOPB价格和库存,欢迎联系客服免费人工找货

LM27951SDXSLASHNOPB规格书详情

1 Features

1• Input Voltage Range: 2.8 V to 5.5 V

• Drives up to Four LEDs With up to 30 mA each

• Regulated Current Sources with 0.2% (Typical)

Matching

• 3/2×, 1× Gain Transition Based on LED Vƒ

• Peak Efficiency Over 85%

• PWM Brightness Control

• Very Small Solution Size - No Inductor

• Fixed 750-kHz Switching Frequency

• < 1-μA Shutdown Current

2 Applications

• White LED Display Backlights

• White LED Keypad Backlights

• General Purpose LED Lighting

3 Description

The LM27951 is a switched capacitor white-LED

driver capable of driving up to four LEDs with 30 mA

through each LED. Its four tightly regulated current

sources ensure excellent LED current and brightness

matching. LED drive current is programmed by an

external sense resistor. The LM27951 operates over

an input voltage range from 2.8 V to 5.5 V and

requires only four low-cost ceramic capacitors.

The LM27951 provides excellent efficiency without

the use of an inductor by operating the charge pump

in a gain of 3/2, or in a gain of 1. Maximum efficiency

is achieved over the input voltage range by actively

selecting the proper gain based on the LED forward

voltage requirements.

The LM27951 uses constant frequency pre-regulation

to minimize conducted noise on the input. It has a

fixed 750-kHz switching frequency optimized for

portable applications. The LM27951 consumes less

than 1 μA of supply current when shut down.

The LM27951 is available in a 14-pin no-pullback

WSON package.

供应商 型号 品牌 批号 封装 库存 备注 价格
NS
25+
LLP
860000
明嘉莱只做原装正品现货
询价
原厂
23+
QFN
5000
原装正品,假一罚十
询价
NSC
24+
SOP
3250
询价
TI/德州仪器
23+
14-WSON
3037
原装正品代理渠道价格优势
询价
TexasInstruments
18+
ICLEDDRIVRWHITEBCKLGT14-
6580
公司原装现货/欢迎来电咨询!
询价
NS
22+
DFN-14
3000
原装正品,支持实单
询价
TI
23+
14WSON (4x3)
9000
原装正品,支持实单
询价
NS/国半
2447
DFN-14
100500
一级代理专营品牌!原装正品,优势现货,长期排单到货
询价
TI德州仪器
22+
24000
原装正品现货,实单可谈,量大价优
询价
TI
24+
14-WSON(4x3)
66800
原厂授权一级代理,专注汽车、医疗、工业、新能源!
询价