Datasheet > MIC4833

MIC4833

更新时间： 2023-12-06 20:09:58

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
12页	1152K
描述
The MIC4833 is a low noise dual electroluminescent (EL) panel driver used in backlighting applicat

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MIC4833 数据手册

MIC4833

Low Noise Dual 220 V_PPEL Driver

With Output Voltage Slew Rate Control

General Description

Features

•

Drives two EL panels, up to 4 in²each at full

brightness

The MIC4833 is a low noise dual Electroluminescent (EL)

Panel driver used in backlighting applications. The

MIC4833 converts a low DC voltage to a high DC voltage

using a boost converter and then alternates the high DC

voltage across the EL panels using an H-bridge. The

MIC4833 incorporates internal wave-shaping circuitry

specifically designed to reduce audible noise emitted by

EL panels. The two EL panels may be dimmed by applying

a PWM signal to the device. The MIC4833 drives two

outputs from a single inductor and requires a minimum

number of passive components. It features an operating

input voltage range of 2.3V to 5.8V, making it suitable for

1-cell Li-ion and 2- or 3-cell alkaline/NiCad/NiMH battery

applications.

•

Independent input control for each of the two panels

and allows PWM dimming.

•

220Vpp regulated AC output waveform

2.3V to 5.8V DC input voltage

Wave-shaping circuit to reduce audible noise

Adjustable slew rate for audible noise reduction

Independently adjustable boost converter and EL

panel frequency

•

Single inductor to power both panels

0.1uA typical shutdown current

12 pin 3mmx3mm MLF^®package

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

An external resistor may be used to adjust the output

voltage slew rate to reduce audible noise. The MIC4833

features separate oscillators for the boost and H-bridge

stages to allow independent control. External resistors set

the operating frequencies of each stage allowing the EL

circuit to optimize efficiency and brightness.

Applications

•

Mobile Phones

MP3s/Portable Media Players (PMP)

Clocks/ Watches

Remote Controls

Cordless Phones

GPS Devices

The MIC4833 is available in a 12 pin 3mmx3mm MLF^®

package, and has an operating junction temperature range

of –40°C to +125°C.

PDAs

_________________________________________________________________________________________________

Typical Application

High

50k

Low

ENA

VDD

RSW

REL

ENB

GND

SLEW

ELA

ELB

COM

VIN

Li Ion

3V to 4.2V

EL Lamp A

EL Lamp B

332k

0.01µF

MIC4833

1.78M

High

Low

VIN

Li Ion

3V to 4.2V

220µH

2.2nF

250V

10µF

Low Noise Dual EL Driver

MLF and MicroLead Frame are registered trademark of Amkor Technologies

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

M9999-100308

(408) 955-1690

October 2008

12 3 4 5 6 7...12

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与MIC4833相关器件

型号	品牌	获取价格	描述	数据表
MIC4833YML	MICREL	获取价格	Low Noise Dual 220 VPP EL Driver With Output Voltage Slew Rate Control
MIC4833YML-TR	MICROCHIP	获取价格	EL DISPLAY DRIVER, DSO12
MIC4834	MICREL	获取价格	Low Noise Dual 220 VPP EL Driver
MIC4834YML	MICREL	获取价格	Low Noise Dual 220 VPP EL Driver
MIC4834YMLTR	MICREL	获取价格	EL DISPLAY DRIVER, DSO10, 3 X 3 MM, ROHS COMPLIANT, MLF-10
MIC4834YML-TR	MICROCHIP	获取价格	EL Driver, 3 X 3 MM, ROHS COMPLIANT, MLF-10
MIC4834YMM	MICREL	获取价格	Low Noise Dual 220 VPP EL Driver
MIC4834YMM	MICROCHIP	获取价格	EL Driver, 1-Segment, PDSO10, ROHS COMPLIANT, MSOP-10
MIC4834YMM-TR	MICROCHIP	获取价格	EL Driver, PDSO10, ROHS COMPLIANT, MSOP-10
MIC49150	MICREL	获取价格	1.5A Low Voltage LDO Regulator w/Dual Input Voltages

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