The controller includes a built-in reference voltage regulator so it can be operated directly from the battery without the need of an external 5V supply from the system. The LX1699 power stage is full bridge driven and includes DC coupled high side drivers on chip for the external P-channel high side and N-channel low side power MOSFETs. Also for fixed input supply applications the IC may be used as a Direct Drive CCFL controller connected directly to the high voltage transformer primary via a single pair of N-FET drivers.