The LX1691B is an enhanced Direct modes that control lamp current amplitude Drive CCFL (Cold Cathode Fluorescent and duty cycle simultaneously or separately. Lamp) Controller. Its architecture is based on Designers can select normal or reverse the LX1691. The LX1961B is optimized for polarity dimming and precisely program wide input voltage applications. It is similar minimum and maximum lamp currents with to the LX1691 except it has a guaranteed resistors. Fault protection includes open minimum lamp strike interval of one second1 lamp voltage regulation and shutdown for to meet notebook and monitor panel over voltage and over current conditions. manufacturer's specifications. The "B" The LX1691B employs Microsemi's proven version also adds feed forward input voltage and patented strike method that allows sensing to enhance transient response when significant efficiency