LX1693CLQ中文资料Legacy Power Management数据手册Microchip规格书

描述 Description

The LX1693 is a high performance CCFL controller optimized for wide input voltage range notebook display back lighting applications. Its new brightness control architecture provides versatile support for ambient light sensor (ALS) control of panel brightness. It also supports Intel’s DPST (Display Power Saving Technology) that adjusts the brightness as a function of video content. The ALS control architecture is compatible with all Microsemi visible light sensor products.The controller’s digital dimming mode includes three brightness inputs: ALS_IN for the light sensor, BRITE_D for brightness and BST_SYNC for digital dimming and synchronization.. Burst frequency can be controlled either by the on chip burst oscillator or directly by an external logic signal at BST_SYNC. The on chip burst oscillator can either free run orsynchronize to an external signal. Digital Dimming duty cycle is controlled by providing either a DC voltage or a PWM signal to the BRITE_D pin. The LX1693 can be operated directly from the battery without the need of an external 5V supply from the system.The LX1693 power stage includes direct coupled full bridge high voltage drivers for the external N-channel high side and N-channel low side power FETs.The LX1693 includes lamp current and open lamp voltage regulation, fully programmable lamp frequency and burst dimming frequency oscillators, and our patented fool-proof lamp strike circuitry.Analog programmable open lamp strike time-out, over voltage, and short circuit fault detection are fully implemented.The LX1693 is available in the 28 pin 4 x5 MLPQ surface mount package.