MIC4830
Low Noise 180V
PP
EL Driver
General Description
The MIC4830 is a low noise 180V
PP
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
®
3mm × 3mm and
MSOP-8 Pb-free and RoHS-compliant packaging with a
–40°C to 85°C junction temperature range.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
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1.8V to 5.5V input voltage
180Vpp output voltage
Low audible noise EL drive waveform
Supports EL panel sizes up to 4in
2
(25cm
2
)
Low 45µA operating supply current
Small inductor size with low profile (220µH)
Tiny 8-pin 3mm × 3mm MLF
®
package
Adjustable boost converter frequency
Adjustable EL lamp frequency
Low 10nA shutdown current
Applications
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LCD panel backlight
Mobile Phones
PDAs
Pagers
Calculators
Multimedia Players
Remote controls
GPS Receivers
Typical Application
Low Noise EL Driver
MLF and
MicroLeadFrame
are registered trademark of Amkor Technology, 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
July 2009
M9999-070709-C