LX1691
DESCRIPTION
KEY FEATURES
. Microsemi . C OM
Microsemi’s LX1691 is a cost reduced, enhanced feature set, Direct Drive CCFL (Cold Cathode Fluorescent Lamp) Controller. Its architecture is based on the very popular LX1689. By limiting VDDP to 5.5V and using advanced processing, die size and package pin count is decreased while improving dimming precision. LX1691 based inverter modules can be designed for virtually any CCFL appliance from digital cameras and PDA’s to big screen monitors and driver viewable automotive displays. New versatile dimming circuitry can accept digital and analog control inputs and provides six different dimming modes that control both lamp current amplitude and duty cycle, either simultaneously or separately. Designers can select normal or reverse polarity dimming and precisely program minimum and maximum lamp currents with resistors. The LX1691 fault shutdown feature is enhanced to include regulation and shutdown for over voltage and over current...
