MIC4830

Low Noise 180Vp-p EL Driver

MLF and MicroLead Frame are registered trademark of Amkor Technologies

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

September 2007

M9999-091307

(408) 955-1690

General Description

The MIC4830 is a low noise 180Vp-p electroluminescent

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

(BCD) technology, the MIC4830 integrates a high voltage

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

EL lamp. The MIC4830 can drive large panel displays for

mobile

phones,

multimedia

players

or

automotive

electronics where EL panels are used for backlighting.

The MIC4830 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 MIC4830 is offered in MLF

8 Pb-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 input voltage

• 180Vpp output voltage

• Low audible noise EL drive waveform

• Low 45µA operating supply current

• Small inductor size with low profile (220µH)

• Adjustable boost converter frequency

• Adjustable EL lamp frequency

• Low 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