HV823LG-G

Product Summary

The Supertex HV823LG-G is a high-voltage driver designed for driving EL lamps of up to 50nF. Thus, EL lamps can be driven for applications not requiring high brightness. 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 ±90V. The chip can be enabled by connecting the resistors on the RSW-Osc pin and the REL-Osc pin to the VDD pin, and disabled when connected to GND. The HV823LG-G has two internal oscillators, a switching MOSFET and a high-voltage EL lamp driver. The frequency of the switching converter MOSFET is set by an external resistor connected between the RSWOsc 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 pin. An external inductor is connected between the LX pin and the VDD pin. A 0.01μF to 0.1μF capacitor is connected between the CS pin and the GND. The EL lamp is connected between the VA and VB pins.

Parametrics

Absolute maximum ratings: (1)On resistance of switching transistor, RDS(ON): 2.0 to 6.0Ω when I = 100mA; (2)Output voltage VCS regulation, VCS: 80 to 100V when VIN = 2.0V to 9.5V; (3)Output peak-to-peak voltage, VA-VB: 160 to 200V when VIN = 2.0V to 9.5V; (4)Quiescent VDD supply current, disabled, IDDQ: 30 to 100nA at RSW-OSC=Low; (5)VDD supply current, IDD: 150 to 200μA when VIN = 3.0V; (6)VDD supply current, IDD: 300 μA when VIN=5.0V; (7)VDD supply current, IDD: 500 μA when VIN=9.0V; (8)Input current including inductor current, Iin: -25 to 33mA when Vin=3.0V; (9)Output voltage on VCS, VCS: 60 to 85V when Vin=3.0V; (10)VA - VB output drive frequency, fEL: 330 to 450Hz when Vin=3.0V; (11)Inductor switching frequency, fSW: 50 to 70KHz when Vin=3.0V; (12)Switching transistor duty cycle, D: 88%.

Features

Features: (1)Processed with HVCMOS technology; (2)2.0 to 9.5V operating supply voltage; (3)DC to AC conversion; (4)180V peak-to-peak typical output voltage; (5)Large output load capability typically 50nF; (6)Permits the use of high-resistance elastomeric lamp components; (7)Adjustable output lamp frequency to control lamp color, lamp life, and power consumption; (8)Adjustable converter frequency to eliminate harmonics and optimize power consumption; (9)Enable/disable function; (10)Low current draw under no load condition.

Diagrams