HV862

HV862 Dimmable, Low Noise, Dual EL Lamp Driver Features ► Adjustable output regulation for dimming ► Lamp fade-in/fade-out capability ► Low audible noise ► 180VPP output voltage for higher brightness ► 1.5V enable input logic high ► Single cell lithium ion compatible ► One miniature inductor to power both lamps ► Separately adjustable lamp and converter frequencies ► Split supply capability ► 16-Lead QFN package Applications ► Dual display cellular phones ► Keypad and LCD backlighting ► PDAs ► Handheld wireless communication products ► Global Positioning Systems (GPS) The device uses a single inductor and a minimum number of passive components. Using the internal reference voltage, the regulated output voltage is at a nominal value of 90V. The EL Lamps will therefore see ±90V. The two EL Lamps can be turned ON and OFF using two CMOS logic inputs, EN1 and EN2. The driver is disabled when both EN1 and EN2 are at logic low. The HV862 has two internal osci...