Low Noise, High Voltage EL Lamp Driver ICThe Supertex HV857 is a high voltage driver designed for driving
Electroluminescent (EL) lamps of up to 5 square inches. The
input supply voltage range is from 1.8V to 5.0V. The device uses
a single inductor and a minimum number of passive components.
The nominal regulated output voltage that is applied to the EL
lamp is 95V. The chip CAN be enabled/disabled by connecting
the resistor on RSW-Osc to VDD/GND.
The HV857 has two internal Oscillators a switching MOSFET
and a high voltage EL lamp driver. The frequency for the switching
MOSFET is set by an external resistor connected between the
RSW-Osc pin and the supply pin VDD. The EL lamp driver
frequency is set by an external resistor connected between REL-
Osc pin and VDD pin. An external inductor is connected between
the LX and VDD pins or V for split supply applications. A 0.003-
IN
0.1F capacitor is connected between CS and ground. The EL
lamp is connected between VA and VB. By Supertex, Inc.
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HV857 Pb-Free | HV857 Cross Reference | HV857 Schematic | HV857 Distributor |
HV857 Application Notes | HV857 RoHS | HV857 Circuits | HV857 footprint |