Datasheet > LM3555

LM3555

更新时间： 2023-09-03 20:27:19

品牌	Logo	应用领域
德州仪器 - TI		升压转换器驱动驱动器
页数	文件大小	规格书
38页	873K
描述
具有 500mA 高侧 LED 驱动器和双模式控制接口的同步升压转换器

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LM3555

SNVS594G –DECEMBER 2008–REVISED APRIL 2016

LM3555 Synchronous Boost Converter With 500-mA High-Side

LED Driver and Dual-Mode Control Interface

3 Description

1 Features

The LM3555 is a 2-MHz fixed-frequency, current-

•

High-Voltage High-Side Current Source Allows for

Grounded Cathode LED Operation

mode synchronous boost converter designed to drive

either a single flash LED at 500 mA or two series

flash LEDs at 400 mA. A high-voltage current source

allows the LEDs to be terminated to the GND plane

eliminating the need for an additional return trace

back to the device.

•

Synchronous Boost Converter

Peak Converter Efficiency > 90%

Accurate and Programmable LED Current

Ranging From 60 mA to 500 mA

A dual-mode control interface allows the user to

•

Adaptive LED Current Range Based on LED

Configuration

configure the LM3555 with

general-purpose

interface using two enable pins for control or an I²C

allowing a higher level of control. Both interfaces

allow access to the indicator, assist light, and flash

modes. A dedicated STROBE pin provides a direct

interface to trigger the flash event, while an external

TORCH pin provides an additional method for

enabling the LEDs in a constant current mode.

•

Dedicated Indicator Current Source

Dedicated Torch and Strobe Pins

Dual Mode Control (General Purpose or I²C)

Broken Inductor Detection

Output Overvoltage Protection

Output and LED Short-Circuit Protection

400-kHz I²C-Compatible Interface

The LM3555 can adaptively scale the maximum flash

level delivered to the LEDs based upon the flash

configuration, whether it be a single LED or two LEDs

in series.

2 Applications

Camera Phone LED Flash

Eight protection features are available on the LM3555

ranging from overvoltage protection to broken

inductor detection. The LM3555 has four selectable

inductor current limits to help the user select an

inductor that is appropriate for the design.

Device Information⁽¹⁾

PART NUMBER

PACKAGE

BODY SIZE (MAX)

LM3555

DSBGA (12)

2.09 mm × 1.565 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application

2.2 µH

10 µF

VIN

VOUT

VLED

OUT

10 µF

BAT

STROBE

TORCH

I2C/EN

LM3555

SCL/EN1

SDA/EN2

IND

PGND SGND

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...38

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与LM3555相关器件

型号	品牌	获取价格	描述	数据表
LM3555TLE/NOPB	TI	获取价格	具有 500mA 高侧 LED 驱动器和双模式控制接口的同步升压转换器 \| YZR \| 1
LM3555TLX/NOPB	TI	获取价格	具有 500mA 高侧 LED 驱动器和双模式控制接口的同步升压转换器 \| YZR \| 1
LM3556	TI	获取价格	1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Source
LM3556_14	TI	获取价格	1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Source
LM3556TME/NOPB	TI	获取价格	LM3556 1.5A 感应式白光 LED 相机闪存器件 \| YFQ \| 16 \| -40
LM3556TMX/NOPB	TI	获取价格	LM3556 1.5A 感应式白光 LED 相机闪存器件 \| YFQ \| 16 \| -40
LM3557	NSC	获取价格	Step-Up Converter for White LED Applications
LM3557	TI	获取价格	Step-Up Converter for White LED Applications
LM3557SD-2	NSC	获取价格	Step-Up Converter for White LED Applications
LM3557SD-2	TI	获取价格	1.1A SWITCHING REGULATOR, 1600kHz SWITCHING FREQ-MAX, PDSO8, 1 MM HEIGHT, LLP-8

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