Datasheet > LM3630A_15

LM3630A_15

更新时间： 2024-11-05 02:58:19

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
45页	520K
描述
High-Efficiency Dual-String White LED Driver

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LM3630A_15 数据手册

LM3630A

www.ti.com

SNVS974 –APRIL 2013

LM3630A High-Efficiency Dual-String White LED Driver

Check for Samples: LM3630A

FEATURES

DESCRIPTION

The LM3630A is a current mode boost converter

which supplies the power and controls the current in

up to two strings of 10 LEDs per string. Programming

is done over an I²C-compatible interface. The

maximum LED current is adjustable from 5 mA to

28.5 mA. At any given maximum LED current the

LED brightness is further adjusted with 256

exponential or linear dimming steps. Additionally,

pulsed width modulation ("PWM") brightness control

can be enabled allowing for LED current adjustment

by a logic level PWM signal.

•

Drives up to 2 strings of 10 series LEDs

Up to 87% efficient

8-bit I²C-Compatible Programmable

Exponential or Linear Brightness Control

•

PWM Brightness Control for CABC Operation

Independent Current Control per String

True Shutdown Isolation for LEDs

Internal Soft-Start Limits Inrush Current

Wide 2.3V to 5.5V Input Voltage Range

Adaptive Headroom

The boost switching frequency is programmable at

500 kHz for low switching loss performance or 1MHz

to allow the use of tiny low profile inductors. A setting

for a 10% offset of these frequencies is available.

Over-voltage protection is programmable at 16V,

24V, 32V, or 40V to accommodate a wide variety of

LED configurations and Schottky Diode/Output

Capacitor combinations.

Programmable 16V/24V/32V/40V Over-Voltage

Protection

•

Selectable Boost Frequency of 500 kHz or

1MHz with optionally additional offset

•

Low Profile 12-Bump DSBGA Package

Solution Size 32mm²

The device operates over the 2.3V to 5.5V operating

voltage range and -40°C to +85°C ambient

temperature range. The LM3630A is available in an

ultra-small 12-bump DSBGA package.

APPLICATIONS

•

Smart-Phone LCD Backlighting

LCD + Keypad Lighting

TYPICAL APPLICATION CIRCUIT

VOUT up to 40V

VIN

CIN

COUT

OVP

SDA

SCL

INTN

HWEN

PWM

SEL

LM3630A

LED1

LED2

GND

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...45

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与LM3630A_15相关器件

型号	品牌	获取价格	描述	数据表
LM3630ATME	TI	获取价格	LM3630A High-Efficiency Dual-String White LED Driver
LM3630ATMX	TI	获取价格	LM3630A High-Efficiency Dual-String White LED Driver
LM3631	TI	获取价格	适用于 LCD 面板的集成式 WLED 背光驱动器和偏置电源
LM3631YFFR	TI	获取价格	适用于 LCD 面板的集成式 WLED 背光驱动器和偏置电源 \| YFF \| 24 \| -
LM3632A	TI	获取价格	具有偏置电源和 1.5A LED 闪光灯驱动器的单芯片背光
LM3632AYFFR	TI	获取价格	具有偏置电源和 1.5A LED 闪光灯驱动器的单芯片背光 \| YFF \| 30 \| -4
LM3633	TI	获取价格	适用于智能手机的完整照明电源解决方案
LM3633YFQR	TI	获取价格	适用于智能手机的完整照明电源解决方案 \| YFQ \| 20 \| -40 to 85
LM3639A	TI	获取价格	LM3639A Single Chip 40V Backlight 1.5A Flash LED Driver
LM3639AYFQR	TI	获取价格	LM3639A 单芯片 40V 背光 + 1.5A LED 闪光灯驱动器 \| YFQ \|

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