HV829A

HV829A/B www.DataSheet4U.com HV829A/B Advance Information High Voltage EL Lamp Driver Features ❑ Processed with HVCMOS® technology ❑ VDD voltage range = 2.7 to 5.5V DC ❑ Output load up to 70nF (20 in2 for 3.5nF/ in2 lamp) ❑ Adjustable DC-DC converter frequency ❑ Continious output voltage regulation control (from 50V to 200V) General Description The Supertex HV829A/B are high voltage EL lamp driver integrated circuits designed for driving EL lamps of up to 70nF at 1000Hz. The input supply voltage range is from 2.7V to 5.5V. These devices use a single inductor, a high voltage switching FET and a minimum number of passive components. The HV829A/B will supply the EL lamp with an AC square wave with a peak-to-peak voltage of two times the set regulated DC voltage. The HV829A/B has one internal oscillator and a high voltage EL lamp driver. The frequency for the external switching MOSFET is set by an external resistor connected between the RSW-osc pin and GND. The EL frequency for the HV829A is equal to the switching frequency divided by 64 where the EL frequency for the HV829B is equal to the switching frequency divided by 128. Gate of the external MOSFET is connected to the Gate pin. An external inductor is connected between the Drain of external MOSFET and VDD pin. A 0.01-2.5µF capacitor is connected between Cs and ground. The EL lamp is connected between VA and VB. The output voltage regulation level is controlled via the VREG pin for dimming and/or conservation of power. Th...