MIC4832YML TR Microchip

MIC4832 Low Noise 220V EL Driver PP General Description Features The MIC4832 is a low noise 220V electroluminescent 1.8V to 5.5V DC input voltage PP lamp (EL) driver. Using advanced Bipolar, CMOS, DMOS 220Vpp output voltage capable (BCD) technology, the MIC4832 integrates a high voltage Low audible noise EL drive waveform boost converter and an H-bridge driver for driving a large 2 2 Supports EL panel sizes up to 3in (19cm ) EL lamp. The MIC4832 can drive large panel displays for mobile phones, multimedia players or automotive Low 45A operating supply current electronics where EL panels are used for backlighting. Small inductor size with low profile (220uH) The MIC4832 offers design flexibility with adjustable lamp Tiny 8-pin 3mm x 3mm MLF package and boost converter frequencies, simply by applying Adjustable boost converter frequency external resistors. A new H-Bridge design reduces audible Adjustable EL lamp frequency noise by creating smoother AC voltage across the EL 10nA shutdown current panel. The MIC4832 is offered in MLF 3mm x 3mm and MSOP- 8 lead-free and RoHS-compliant packaging with a -40C to Applications 85C junction temperature range. LCD panel backlight Datasheets and support documentation can be found on Mobile Phones Micrels web site at: www.micrel.com. 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 +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel MIC4832 Ordering Information Part Number Junction Temp. Range Package Lead Finish MIC4832YML 40 to +85C 8-Pin 3mm 3mm MLF RoHS Compliant / Pb-Free / Halogen Free* MIC4832YMM 40 to +85C 8-Pin MSOP RoHS Compliant / Pb-Free Note *MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration 8-Pin MSOP (MM) 8-Pin 3mm 3mm MLF (ML) Pin Description Pin Number Pin Name Pin Function 1 VDD Supply (Input): 1.8V to 5.5V for internal circuitry. 2 RSW Switch Resistor (External Component): Set switch frequency of the internal power MOSFET by connecting an external resistor to VDD. Connecting the external resistor to GND disables the switch oscillator and shuts down the device. 3 REL EL Resistor (External Component): Set EL frequency of the internal H-bridge driver by connecting an external resistor to VDD. Connecting the external resistor to GND disables the EL oscillator. 4 GND Ground 5 SW Switch Node (Input): Internal high-voltage power MOSFET drain. 6 CS Regulated Boost Output (External Component): Connect to the output capacitor of the boost regulator and connect to the cathode of the diode. 7 VB EL Output: Connect to one end of the EL lamp. Polarity is not important. 8 VA EL Output: Connect to one end of the EL lamp. Polarity is not important. 2 M9999-033109-C March 2009