HV833MG-G Microchip

Supertex inc. HV833 High Voltage EL Lamp Driver Features General Description 1.8 to 6.5V operating supply voltage The Supertex HV833 is a high voltage driver designed for driving EL 2 lamps of up to 35nF (10-12in ). The input supply voltage range is from DC to AC conversion 1.8 to 6.5V. The device uses a single inductor and a minimum number Separately adjustable lamp and converter of passive components. The nominal regulated output voltage that is frequency applied to the EL lamp is 90V. The chip can be enabled/disabled by Output voltage regulation connecting a resistor between the RSW-Osc pin and the VDD/GND Enable/disable function pins. Patented output timing for high efficiency <100nA shutdown current The HV833 has two internal oscillators, a switching MOSFET, and a Split supply capability high voltage EL lamp driver. The frequency for the switching MOSFET LCD backlighting is set by an external resistor connected between the RSW-Osc pin and the VDD supply pin. The EL lamp driver frequency is set by an external resistor connected between the REL-Osc pin and the VDD Applications pin. An external inductor is connected between the LX pin and VDD Portable transceivers or VIN pin. A 0.003-0.1F capacitor is connected between the CS pin Remote control units and the GND pin. The EL lamp is connected between the VA pin and Calculators the VB pin. PDAs Global Positioning Systems (GPS) The switching MOSFET charges the external inductor and discharges it into the capacitor at CS. The voltage at CS will start to increase. Once the voltage at CS reaches a nominal value of 90V, the switching MOSFET is turned OFF to conserve power. The outputs VA and VB are configured as an H bridge and are switching in opposite states to achieve 180V peak-to-peak across the EL lamp. Typical Application Circuit ON = V DD Enable Signal OFF = 0 VA V 1 VDD 8 DD EL Lamp VB 2 RSW-Osc 7 3 REL-Osc CS 6 1N914 4 GND LX 5 + C V S IN 100V L HV833 X Doc. DSFP-HV833 Supertex inc. A061813 www.supertex.comHV833 Pin Configuration Ordering Information Part Number Package Packing 1 8 VDD VA HV833MG-G 8-Lead MSOP 2500/Reel 2 7 RSW-Osc VB -G denotes a lead (Pb)-free / RoHS compliant package 3 6 REL-Osc CS Absolute Maximum Ratings 4 5 GND LX Parameter Value 8-Lead MSOP Supply voltage V -0.5V to 7.5V DD (top view) Output voltage, V -0.5V to 125V CS Operating temperature -40C to +85C Product Marking Storage temperature -65C to +150C Top Marking Power dissipation 300mW H833 L = Lot Number LLLL Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation YY = Year Sealed of the device at the absolute rating level may affect device reliability. All voltages are Bottom Marking WW = Week Sealed referenced to device ground. = Green Packaging YYWW Typical Thermal Resistance Package may or may not include the following marks: Si or Package ja O 8-Lead MSOP 8-Lead MSOP 216 C/W Recommended Operating Conditions Sym Parameter Min Typ Max Units Conditions V Supply voltage 1.8 - 6.5 V --- DD f V output drive frequency 60 - 1000 Hz --- EL A-B T Operating temperature -25 - +85 C --- A DC Electrical Characteristics (Over recommended operating conditions unless otherwise specified, T = 25C) A Sym Parameter Min Typ Max Units Conditions R On-resistance of switching transistor - - 4.0 I = 100mA DS(ON) V Max. output regulation voltage 80 90 100 V V = 1.8 to 6.5V CS DD V Max differential output voltage across lamp 160 180 200 V V = 1.8 to 6.5V A-B DD I Quiescent V supply current - - 100 nA R = Low DDQ DD SW-Osc I Input current going into the VDD pin - - 150 A V = 1.8 to 6.5V. See Fig. 1 DD DD I Input current including inductor current - 56 64 mA V = 3.3V. See Fig. 1. IN IN V Output voltage on V 63 72 81 V V = 3.3V. See Fig. 1. CS CS IN f V output drive frequency 240 270 300 Hz V = 3.3V. See Fig. 1. EL DIFF IN F Switching transistor frequency 55 65 75 kHz V = 3.3V. See Fig. 1. SW IN D Switching transistor duty cycle - 88 - % See Fig. 1. Doc. DSFP-HV833 Supertex inc. A061813 2 www.supertex.com