Key Features: Wide Input Voltage Capable Simultaneous Amplitude And Duty Cycle Dimming Modes Resistor programmable min and max lamp currents Digital Dimming Can Synch To External Or Internal Clocks 120 ms Power On Delay Open Or Shorted Lamp Regulation & Shutdown “On Chip” Full Wave Lamp Current Rectifier 16 Pin TSSOP Package Very Stable Oscillator with On-Chip timing capacitor Enhanced Digital Dimming Resolution Description: The LX1691B is an enhanced Direct Drive CCFL (Cold Cathode Fluorescent Lamp) Controller. Its architecture is based on the LX1691. The LX1961B is optimized for wide input voltage applications. It is similar to the LX1691 except it has a guaranteed minimum lamp strike interval of one second to meet notebook and monitor panel manufacturer’s specifications. The “B” version also adds feed forward input voltage sensing to enhance transient response when used in inverters that derive lamp power from unregulated input supplies and batteries.
