Datasheet > LM3552

LM3552

更新时间： 2024-10-02 02:58:23

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
21页	771K
描述
1A White LED Driver with Flash Timeout Protection

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LM3552 数据手册

LM3551, LM3552

www.ti.com

SNVS371D –AUGUST 2005–REVISED MAY 2013

LM3551 /LM3552 1A White LED Driver with Flash Timeout Protection

Check for Samples: LM3551, LM3552

FEATURES

DESCRIPTION

The LM3551 and LM3552 are fixed frequency,

current mode step-up DC/DC converters with two

integrated NFETs that can be used for precision LED

brightness control. The devices are capable of driving

loads up to 1A from a single-cell Li-Ion battery.

•

Up to 1A Total Drive Current

Flash Timeout Protection

Independent Torch/Flash/Shutdown Modes

LED Disconnect in Shutdown

Programmable Soft-Start Limits Inrush Current

Over-Voltage Protection

The LM3551 and LM3552 can drive one or more high

current flash LEDs either in a high power Flash mode

lower power Torch mode using the

programmable Timeout

Wide Voltage Range 2.7 to 5.5V

1.25MHz Constant Switching Frequency

TORCH/FLASH pin.

function on the FTO pin forces the internal NFETs to

turn off after a certain user defined time. An external

SD pin (LM3551) or EN pin (LM3552) is available to

put the device into low power shutdown mode. During

shutdown, the feedback resistors and the load are

disconnected from the input to avoid leakage current

paths to ground.

Small, Low Profile Package, Non-Pullback

WSON(4mm x 4mm)

APPLICATIONS

•

White LED Camera Flash

White LED Torch (Flashlight)

DSC (Digital Still Camera) Flash

Cellular Camera Phone Flash

PDA Camera Flash

User programmable soft-start circuitry has been

integrated to eliminate large inrush currents at start-

up. Over-voltage protection circuitry and a 1.25MHz

switching frequency allow for the use of small, low-

cost output capacitors with lower voltage ratings. The

LM3551 and LM3552 are available in a low profile 14-

pin WSON package.

Camcorder Torch (Flashlight) Lamp

Typical Application Circuits

Sharp

GM5BW05340A

Flash LED

OVP

BAT

OUT

FTO

LM3551/2

FET-T

FET-F

FTO

GND

T/F

SD/

LUMILED

LXCL-PWF1

Flash LED

OVP

BAT

OUT

LM3551/2

FTO

FET-T

FET-F

FTO

SD/

T/F

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...21

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与LM3552相关器件

型号	品牌	获取价格	描述	数据表
LM3552EN	NSC	获取价格	暂无描述
LM3552ENX	NSC	获取价格	IC LED DISPLAY DRIVER, QCC14, 4 X 4 MM, LLP-24, Display Driver
LM3552SD	NSC	获取价格	1A White LED Driver with Flash Timeout Protection
LM3552SD	TI	获取价格	LED DISPLAY DRIVER, QCC14, 4 X 4 MM, LLP-24
LM3552SD/NOPB	TI	获取价格	1A White LED Driver with Flash Timeout Protection 14-WSON -40 to 85
LM3552SDX	NSC	获取价格	1A White LED Driver with Flash Timeout Protection
LM3552SDX/NOPB	TI	获取价格	1A White LED Driver with Flash Timeout Protection 14-WSON -40 to 85
LM3553	NSC	获取价格	1.2A Dual Flash LED Driver System with I2C Compatible
LM3553	TI	获取价格	具有 I2C 兼容接口的 1.2A 双闪存 LED 驱动器系统
LM3553SD/NOPB	TI	获取价格	具有 I2C 兼容接口的 1.2A 双闪存 LED 驱动器系统 \| DQB \| 12 \|

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