LX1691

www.DataSheet4U.com LX1691 TM ® Enhanced Multi-Mode CCFL Controller P RODUCTION D ATA S HEET DESCRIPTION KEY FEATURES WWW . 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 conditions. Microsemi’s proven and patented Direct Drive architecture works with system voltages from 3 volts to more than 50 volts, limited only by the external power FET’s that drive the high voltage transformer. The LX1691 includes the Microsemi proven and patented strike method that allows significant efficiency gains while guaranteeing strong striking power at all operating temperatures. Our method sweep...