LXM1612

The features of LXM1612:

Dual Drive, RangeMAX Wide Range Dimming,Single Output Inverter.
The LXM1614 series of Direct DriveTM CCFL (Cold Cathode Fluorescent Lamp) Inverter Modules is specifically designed for driving LCD backlight lamps. Although similar to the RangeMAX LXM1612 wide range dimming inverters, the LXM1614 family offers two separate brightness controls for lamp current amplitude and duty cycle. This innovation of dual brightness controls with extended dimming, combined with Linfinity's high efficiency Direct Drive topology provides the industry's most feature rich, small form factor inverter available. The wide range dimming provides exceptional display readability at less than 1% of full brightness, allowing both power savings and low ambient light operating capability.

Dual Drive Dimming Control.
The inverters provide brightness adjustments utilizing standard lamp current amplitude control as well as supporting Linfinity's RangeMAX wide range dimming technique. Combining both brightness controls into a single inverter supports the "self heating" lamp technology by using a "boost" current feature and still offers duty cycle control for low brightness operation. This controlled overdrive capability eliminates the need for traditional resistive heater wire methods to ensure light output at extremely low temperatures. The LXM1614 brightness controls support temperature monitoring with look-up table applications by accepting either a PWM input or DC voltage. Large panel lize this "instant-bright" feature and minimize warm up time.

RangeMAX Digital Dimming Technique.
Digital dimming provides flicker-free brightness control in any wide range dimming application. Dimming ratios greater than 100:1 can be achieved. A video synchronization feature allows wide ratio dimming without the display disturbances and interference seen with competitive products. The resultant "burst drive" that energizes the lamp was designed specifically to ensure that no premature lamp degradation occurs. Even in overdrive boost mode, the waveform is carefully controlled to minimize the effects detrimental to lamp life. Individual panel specifications should be referenced for specific thermal and electrical parameters.

Direct Drive Technology. The module design is based on the Direct Drive topology, which provides a number of cost, performance, and form factor advantages. The LXM1614 series inverters eliminate the classic resonant inductor/capacitors, and integrate the wide range dimming logic into the controller.

Additional Features. Other benefits of this new topology are fixed-frequency operation and secondary-side strike-voltage regulation. Strike-voltage regulation minimizes corona discharge in the output transformer and related circuitry, providing longer life and higher reliability. All LXM1614 modules feature both open and shorted lamp protection. The dual drive LXM1614 is fully customizable (electronically and mechanically) to specific customer requirements.