MIC4832: Low Noise Dual 220 VPP EL Driver With Output Voltage Slew Rate Control - Micrel - #1

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MIC4832 Low Noise 220VPP 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 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com General Description The MIC4832 is a low noise 220VPP 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. Datasheets 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 45ìA 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 March 2009 M9999-033109-C