HV852 High Voltage, Low Noise, Inductorless EL Lamp Driver Features General Description No external components required when using an The Supertex HV852 is a high voltage, low noise, inductorless external EL clock frequency EL (electroluminescent) lamp driver. It is designed to drive EL 2 lamps of up to 1.5in , with capacitive values up to 5.3nF over EL frequency can be set by an external resistor an input voltage range of 2.4 to 5.0V. The HV852 converts a Low Noise low voltage DC input to a high voltage AC output across an DC to AC converter EL lamp. It uses a charge pump scheme to boost the input 2 Drives up to 5.3nF (approx. 1.5in lamp) load voltage eliminating the need for an external inductor, diode, Output voltage regulation and high voltage capacitor commonly found in conventional Enable function topologies. EL Lamp dimming The charge pump circuit discharges its energy into an EL lamp through a high voltage H-bridge. Once the voltage reaches Applications its regulated limit, it is turned off to conserve power. The EL lamp is then discharged to ground and the H-bridge changes Cellular phone keypad state to allow the charge pump to charge the EL lamp in the Watches opposite direction. Small handheld wireless devices MP3 Players Typical Application Circuit + VDD VA R EL LAMP V EL C DD DD REL VB - EN GND CLKIN CLKEN V = ON DD GND = OFF H V 8 5 2 M G EL Lamp frequency set by R EL 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.comHV852 Pin Congurations Ordering Information Package Options VDD 1 8 VA VDD 1 10 VA 8-Lead MSOP 10-Lead DFN REL 2 9 VB REL 2 7 VB Device 3.00x3.00mm body 3.00x3.00mm body EN 3 8 GND 1.10mm height (max) 0.80mm height (max) 3 6 GND EN 4 7 CLKIN GND 0.65mm pitch 0.50mm pitch 5 6 CLKEN VDD CLKIN 4 5 CLKEN HV852 HV852MG-G HV852K7-G 8-Lead MSOP 10-Lead DFN -G indicates package is RoHS compliant (Green) (top view) (top view) Note: Pads are at the bottom of the pack- age. Center heat slug is at ground potential. Product Marking Top Marking H 8 5 2 Absolute Maximum Ratings L L L L Parameter Value L = Lot Number YY = Year Sealed V , supply voltage -0.5V to 6.5V DD Bottom Marking WW = Week Sealed Operating temperature -25C to +85C = Green Packaging Y Y W W Storage temperature -65C to +150C Power dissipation: 8-Lead MSOP 300mW Package may or may not include the following marks: Si or Power dissipation: 10-Lead DFN 1.6W 8-Lead MSOP (MG) Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect Y = Last Digit of Year Sealed device reliability. All voltages are referenced to device ground. H852 W = Code for Week Sealed Y W L L L = Lot Number = Green Packaging Package may or may not include the following marks: Si or 10-Lead DFN (K7) Recommended Operating Conditions Sym Parameter Min Typ Max Units Conditions V Input voltage 2.4 - 5.0 V --- DD f EL lamp frequency 50 - 500 Hz --- EL C EL lamp capacitance 0 - 5.3 nF --- load T Operating temperature -25 - +85 C --- A 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 2