MIC4832

Low Noise 220Vp-p EL Driver

MLF and MicroLeadFrame is a registered trademark of Amkor Technologies, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

November 2007

M9999-111507-B

General Description

The MIC4832 is a low noise 220Vp-p electroluminescent

lamp (EL) driver. Using advanced Bipolar, CMOS, DMOS

(BCD) technology, the MIC4832 integrates a high voltage

boost converter and an H-bridge driver for driving a large

EL lamp. The MIC4832 can drive large panel displays for

mobile

phones,

multimedia

players

or

automotive

electronics where EL panels are used for backlighting.

The MIC4832 offers design flexibility with adjustable lamp

and boost converter frequencies, simply by applying

external resistors. A new H-Bridge design reduces audible

noise by creating smoother AC voltage across the EL

panel.

The MIC4832 is offered in MLF

8 lead-free and RoHS compliant packaging with a -40°C to

85°C junction temperature range.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• 1.8V to 5.5V DC input voltage

• 220Vpp output voltage capable

• Low audible noise EL drive waveform

• Low 45µA operating supply current

• Small inductor size with low profile (220uH)

• Adjustable boost converter frequency

• Adjustable EL lamp frequency

• 10nA shutdown current

Applications

• LCD panel backlight

• Mobile Phones

• PDAs

• Pagers

• Calculators

• Multimedia Players

• Remote controls

• GPS Receivers

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Typical Application

Low Noise EL Driver