LXM1643-12-62 Datasheet | Microsemi

DESCRIPTION KEY FEATURES . Microsemi . C OM The LXM1643-12-62 is a Quad 6W Output Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed for driving LCD backlight lamps. It is ideal for driving typical 12.1” to 18.1” TFT panels. LXM1643 modules provides the designer with a vastly superior display brightness range then typical with analog (amplitude control) dimming. The inverter includes a dimming input that permits brightness control from either a DC voltage source or a PWM signal or external Potentiometer. The maximum output current is externally programmable over a range of 5 to 8m A in 1m A steps to allow the inverter to properly match to a wide array of LCD panel lamp current specifications. Range MAX Digital Dimming Technique provides flicker-free brightness control in any wide range typically (50:1+) dimming application. The resultant “burst drive” that energizes the lamp was designed specifically to ensure that no premature lamp degradation occurs, while allowing significant power savings at lower dim levels. The modules convert DC voltage from the system battery or AC adapter directly to high frequency, high-voltage waves required to ignite and operate CCFL lamps. The LXM1643-12-62 inverter is intended for panel assemblies with individual lamp connections, or where lamps are spaced apart from each other. The LXM1643-12-61 inverter should be used for panel applications where lamp pairs are in close proximity and share a mon return (low side) wire. Other benefits of this new topology are stable fixed-frequency operation, secondary-side strike-voltage regulation and both open/shorted lamp protection with fault timeout. PRODUCT HIGHLIGHT - Externally Programmable Maximum Output Current - Easy to Use Brightness Control - Range MAX Wide Range Dimming - Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout - Fixed Frequency Operation - Rated From -20 to 70°C - UL 60950 E175910 APPLICATIONS - High...