General Description

The Supertex HV853 is a high voltage, low noise EL (electroluminescent) lamp driver. It is the low noise version of the HV852 with improved EMI performance, operating over an input voltage range of 3.2V to 5.0V. It is designed to drive EL lamps of up to 1.5in2, with capacitive values up to 5.3nF. The HV853 converts a low voltage DC input to a high voltage AC output across an EL lamp. A nominal regulated output voltage of ±80V is applied to the EL lamp. It uses a charge pump scheme to boost the input voltage eliminating the need for an external inductor, diode, and high voltage capacitor commonly found in conventional topologies.

Features

► No external components required when using an external EL clock frequency

► Audible noise reduction with improved EMI

► EL frequency can be set by an external resistor

► DC to AC converter

► Drives up to 5.3nF (approx. 1.5in2 lamp) load

► Output voltage regulation

► Enable function

► EL Lamp dimming

► Available in 10-Lead DFN and 8-Lead MSOP packages

Applications

► Cellular phone keypad

► Watches

► Small handheld wireless devices

► MP3 Players