MIC4830YML-TR Microchip

MIC4830 Low Noise 180V EL Driver PP General Description Features The MIC4830 is a low noise 180V electroluminescent 1.8V to 5.5V input voltage PP lamp (EL) driver. Using advanced Bipolar, CMOS, DMOS 180Vpp output voltage (BCD) technology, the MIC4830 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 4in (25cm ) EL lamp. The MIC4830 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 (220H) The MIC4830 offers design flexibility with adjustable lamp Tiny 8-pin 3mm 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 Low 10nA shutdown current panel. The MIC4830 is offered in MLF 3mm 3mm and MSOP-8 Pb-free and RoHS-compliant packaging with a Applications 40C to 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 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 Micrel MIC4830 Ordering Information Part Number Junction Temp. Range Package Lead Finish MIC4830YML 40 to +85C 8-Pin 3mm 3mm MLF RoHS-Compliant / Pb-Free / Halogen Free* MIC4830YMM 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 M9999-070709-C July 2009