Datasheet > MIC3291-25YML

MIC3291-25YML

更新时间： 2024-01-01 23:01:06

品牌	Logo	应用领域
麦瑞 - MICREL		驱动光电二极管接口集成电路
页数	文件大小	规格书
17页	830K
描述
1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control

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MIC3291-25YML 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	HVSON,	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.27	数据输入模式：	SERIAL
接口集成电路类型：	LED DISPLAY DRIVER	JESD-30 代码：	S-PDSO-N8
JESD-609代码：	e4	长度：	2 mm
湿度敏感等级：	1	复用显示功能：	NO
功能数量：	1	区段数：	6
端子数量：	8	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	HVSON	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	0.95 mm
最大供电电压：	6.5 V	最小供电电压：	2.5 V
标称供电电压：	3.6 V	表面贴装：	YES
温度等级：	AUTOMOTIVE	端子面层：	NICKEL PALLADIUM GOLD
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

MIC3291-25YML 数据手册

MIC3291

1.2MHz PWM White LED Driver

with Internal Schottky Diode and

Single-Wire Linear Brightness

Control

General Description

Features

The MIC3291 is a PWM switching boost regulator that is

optimized for constant current white LED (WLED) driver

applications. The MIC3291 features an internal Schottky

diode, allowing an efficient DC/DC solution that requires

only four external components.

• Single wire combines 16 level linear brightness and

shutdown control

• 18V / 25V OVP options supports up to four and six

WLEDs

• Startup in any one of 16 brightness levels

• Internal Schottky diode

• 2.5V to 6.5V input voltage

• 1.2MHz PWM operation

• Over 500mA switch current

The MIC3291 allows for a single-wire simple digital

interface to control the dimming over 16 steps with a linear

scale. The preprogramming feature allows the user to

select any one of the 16 WLED current levels as the start

up brightness level.

The feedback voltage of the MIC3291 is only 250mV,

allowing high efficiency while retaining excellent accuracy

for the WLED current.

• 250mV reference voltage

• ±5% LED current accuracy

• <1µA shutdown current

• UVLO and over-temperature protection

• Thin SOT23-6L package option

• 2mm × 2mm leadless MLF^®package option

• –40^oC to +125^oC junction temperature range

The MIC3291 implements a constant frequency 1.2MHz

PWM control scheme. The high frequency PWM operation

saves board space by reducing external component sizes.

The 1.2MHz PWM scheme also reduces switching noise

and ripple to the input power source.

The 2.5V to 6.5V input voltage range of the MIC3291

allows direct operation from single cell Li-Ion as well as 3

to 4 cell NiCad/NiMH/Alkaline batteries. Battery life is

preserved with a low 1µA shutdown current.

Applications

• Mobile handsets

The MIC3291 is available in a low profile Thin SOT23 6-

pin and 2mm × 2mm MLF^®8-pin packages with a junction

temperature range of –40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

• LCD handset backlighting

• Digital cameras

• Portable media players/MP3 players

• Portable applications

___________________________________________________________________________________________________________

Typical Application

White LED Driver with OVP and Digital Control

MLF and MicroLead Frame are registered trademarks of Amkor Technologies, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-092810

(408) 944-0800

September 2010

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中文翻译

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与MIC3291-25YML相关器件

型号	品牌	获取价格	描述	数据表
MIC3291-25YML-TR	MICROCHIP	获取价格	LED Driver, 6-Segment, PDSO8, 2 X 2 MM, GREEN, MLF-8
MIC33030	MICREL	获取价格	8MHz 400mA Internal Inductor Buck Regulator with HyperLight Load
MIC33030	MICROCHIP	获取价格	The MIC33030 is a high-efficiency, 8MHz, 400mA synchronous buck regulator with an internal
MIC33030-4YHJ	MICREL	获取价格	8MHz 400mA Internal Inductor Buck Regulator with HyperLight Load
MIC33030-AYHJ	MICREL	获取价格	8MHz 400mA Internal Inductor Buck Regulator with HyperLight Load
MIC33030-AYHJ-TR	MICROCHIP	获取价格	IC REG BUCK ADJ 0.4A SYNC 10HMLF
MIC33030-GYHJ	MICREL	获取价格	8MHz 400mA Internal Inductor Buck Regulator with HyperLight Load
MIC33030-GYHJ-TR	MICROCHIP	获取价格	IC REG BUCK 1.8V 0.4A SYNC 10MLF
MIC33030-JYHJ	MICREL	获取价格	8MHz 400mA Internal Inductor Buck Regulator with HyperLight Load
MIC33030-JYHJ-TR	MICROCHIP	获取价格	IC REG BUCK 2.5V 0.4A SYNC 10MLF

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