LM3553

更新时间： 2024-11-15 04:44:27

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器闪光灯
页数	文件大小	规格书
18页	393K
描述
1.2A Dual Flash LED Driver System with I2C Compatible

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中文翻译

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数据手册

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LM3553 数据手册

March 6, 2008

LM3553

1.2A Dual Flash LED Driver System with I²C Compatible

Interface

General Description

Features

The LM3553 is a fixed frequency, current mode step-up DC/

DC converter with two regulated current sinks. The device is

capable of driving loads up to 1.2A from a single-cell Li-Ion

battery.

Accurate and Programmable LED Current up to 1.2A in

■

128 Steps

Total Solution Size < 30mm²

■

90% Peak Efficiency

One or more high current flash LEDs can be driven in series

either in a high power Flash mode or a lower power Torch

mode controlled by either an internal register or the F_ENpin.

Additionally a low current (20mA) indicator mode and a fixed

output voltage mode are also available.

Drives 2 LEDs in Series with 1.2A from 5V Input

Drives 2 LEDs in Series with 600mA from 3.0V Input

Drives 1 LED with 1.2A from 3.0V Input

Adjustable Over-Voltage Protection Allows for Single or

Series LED Operation

The LM3553 has 128 current levels and 16 flash safety timer

durations that are user adjustable via an I²C compatible in-

terface. Internal soft-start eliminates large inrush currents at

start-up. Over-voltage protection circuitry and 1.2MHz switch-

ing frequency allow for the use of small, low-cost output

capacitors with lower voltage ratings.

Four Operating Modes: Torch, Flash, Indicator, and

Voltage Mode (4.98V)

■

Programmable Flash Pulse Safety Timer in 16 Steps

■

TX Input Ensures Synchronization with RF Power

Amplifier Pulse or Prevents LED from Overheating

The LM3553 includes a TX pin that forces Torch mode during

a flash event allowing for synchronization between the RF

power amplifier and Flash/Torch modes. It also includes a

multi-function pin (M/F) that can serve as a GPIO and a hard-

ware RESET pin.

LED Disconnect During Shutdown

■

Flash/Imager Synchronization via F_ENPin

Active Low Hardware Reset

Multi-Function Pin (RESET and GPIO)

Low Profile 12-pin LLP Package (SDF12A: 3mm x 3mm x

0.8mm, 0.4mm pitch)

The LM3553 is available in National's 3mm by 3mm LLP12

package.

■

Applications

Camera Phone LED Flash

■

Smartphone and PDA Flash

LED Backlight

Typical Application Circuits

20171419

Solution Size

20171415

201714

www.national.com

12 3 4 5 6 7...18

中文翻译

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与LM3553相关器件

型号	品牌	获取价格	描述	数据表
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 \|
LM3553SD-/NOPB	NSC	获取价格	IC LED DISPLAY DRIVER, DSO12, 3 X 3 MM, 0.80 MM HEIGHT, 0.40 MM PITCH, LEAD FREE, HALOGEN
LM3553SD-HALF	NSC	获取价格	1.2A Dual Flash LED Driver System with I2C Compatible
LM3553SD-NOPB	NSC	获取价格	1.2A Dual Flash LED Driver System with I2C Compatible
LM3553SDX/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 \|
LM3553SDX-HALF	NSC	获取价格	1.2A Dual Flash LED Driver System with I2C Compatible
LM3553SDX-NOPB	NSC	获取价格	1.2A Dual Flash LED Driver System with I2C Compatible
LM3554	NSC	获取价格	Synchronous Boost Con
LM3554	TI	获取价格	具有 1.2A 双路高侧 LED 驱动器和 I2C 兼容接口的同步升压转换器
LM3554TME/NOPB	TI	获取价格	具有 1.2A 双路高侧 LED 驱动器和 I2C 兼容接口的同步升压转换器 \| YFQ

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