A8431

更新时间： 2024-02-25 17:52:33

品牌	Logo	应用领域
急速微 - ALLEGRO		转换器驱动升压转换器
页数	文件大小	规格书
10页	331K
描述
White LED Driver Constant Current Step-up Converter

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

A8431 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SON	包装说明：	2 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, MO-229WCED-1, MLP-6
针数：	6	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.82	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	R-XDSO-N6	JESD-609代码：	e3
长度：	3 mm	湿度敏感等级：	1
复用显示功能：	NO	功能数量：	1
区段数：	1	端子数量：	6
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	HVSON
封装等效代码：	SOLCC6,.12,20	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	3 V	认证状态：	Not Qualified
座面最大高度：	0.75 mm	子类别：	Display Drivers
最大供电电压：	10 V	最小供电电压：	2.5 V
标称供电电压：	3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	2 mm	Base Number Matches：	1

A8431 数据手册

Preliminary Data Sheet

Subject to Change without Notice

December 7, 2004

A8431

White LED Driver Constant Current Step-up Converter

The A8431 is a noninverting boost dc-dc converter that provides a

programmable constant current output up to 32 V for driving white

LEDs in series.The A8431 also offers an OVP (overvoltage protection)

pin. Driving the LEDs in series ensures identical currents and uniform

brightness. Up to four white LEDs can be driven at 20 mA from a single

cell Li-ion or a multicell NiMH power source. Up to two parallel strings

of eight white LEDs can be driven at 20 mA by increasing the supply

voltage up to 10 V.

A8431 MLPD

The A8431 incorporates a power switch and a feedback sense amplifier

to provide a solution with minimum external components. The output

current can be set by adjusting a single external sense resistor and can

be varied with a voltage or a filtered PWM signal when dimming con-

trol is required. The high switching frequency of 1.2 MHz allows the

use of small inductor and capacitor values.

Approximate actual size

The A8431 is provided in a 0.75 mm high, 6-pin, 2 x 3 mm MLP pack-

age. It is lead (Pb) free, with 100% matte tin leadframe plating.

VIN

OVP

GND

FEATURES

_θJA= 50 °C/W, see note 1, page 2

ꢀ

Output voltage up to 32 V (OVP level)

2.5 V to 10 V input

Drives up to 4 LEDs at 20 mA from a 2.5 V supply

Drives up to 5 LEDs at 20 mA from a 3 V supply

1.2 MHz switching frequency

300 mA switch current limit

1 µA shutdown current

ABSOLUTE MAXIMUM RATINGS

OVP pin eliminates the need for an external Zener diode on the output

SW Pin ................................................–0.3 V to 36 V

OVP Pin ..............................................–0.3 V to 36 V

Remaining Pins.................................. –0.3 V to 10 V

Ambient Operating Temperature, T_A....... –40°C to 85°C

Junction Temperature, T_J(max)...............................150°C

Storage Temperature, T_S.................... –55°C to 150°C

APPLICATIONS

ꢀ

LED backlights

Portable battery-powered equipment

Cellular phones

PDAs (Personal Digital Assistant)

Camcorders, personal stereos, MP3 players, cameras

Mobile GPS systems

Use the following complete part numbers when ordering:

Part Number

Package

Description

A8431EEH-T

6-pin, MLPD

Pb-Free, Surface Mount

26185.301

12 3 4 5 6 7...10

下载PDF

与A8431相关器件

型号	品牌	描述	获取价格	数据表
A8431EEH-T	ALLEGRO	White LED Driver Constant Current Step-up Converter	获取价格
A8431EEHTR-T	ALLEGRO	LED Driver, 1-Segment, 2 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, MO-229WCED-1, MLP-6	获取价格
A8434	ALLEGRO	6-Channel High Efficiency Charge Pump White LED Driver	获取价格
A8434EESTR-T	ALLEGRO	6-Channel High Efficiency Charge Pump White LED Driver	获取价格
A8435	ALLEGRO	High Efficiency Charge Pump White LED Driver	获取价格
A8435EES-T	ALLEGRO	LED Driver, PQCC16	获取价格

与A8431相关文章

MAX487芯片引脚图及功能、应用领域详解
2024-04-17

10
IR2110驱动芯片引脚图及功能、电路图详解
2024-04-17

9
74LS74是什么芯片 74LS74引脚图及功能表
2024-04-16

12
CD4511芯片引脚图及功能、电路图解析
2024-04-15

20

产品中心

服务支持

精选活动

关于我们

帮助中心

A8431

A8431 技术参数

A8431 数据手册

与A8431相关器件

与A8431相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

A8431

A8431 技术参数

A8431 数据手册

与A8431相关器件

与A8431相关文章

您还可以找

您在本页遇到什么问题？