MIC4832 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Low Noise 220Vp-p EL Driver

MIC4832
Low Noise 220Vp-p EL Driver
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^® 3mm x 3mm and MSOP-
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
• Supports EL panel sizes up to 3in² (19cm²)
• Low 45µA operating supply current
• Small inductor size with low profile (220uH)
• Tiny 8-pin 3mm x 3mm MLF^® package
• 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
___________________________________________________________________________________________________________
Typical Application
Low Noise EL Driver
MLF and MicroLeadFrame is a registered trademark of Amkor Technologies, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
November 2007
M9999-111507-B