MAX16927

EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX16927 Automotive TFT-LCD Power Supply with Boost, Buck, and Cuk Converters, VCOM Buffers, Gate Drivers, and SPI Interface General Description The MAX16927 is a highly integrated power supply for automotive TFT-LCD applications. The device integrates one buck converter, one boost converter, one Cuk converter, two gate-voltage controllers, and two VCOM buffers, one of which supports negative output voltages. The device is designed to operate from a supply voltage between 4.5V and 16V, making it ideal for automotive TFTLCD applications. Alternatively, the device can operate from an available 3V to 5.5V supply. The device uses an integrated SPI interface for control and diagnostics. The SPI interface adjusts the VCOM buffer output through an internal 7-bit DAC up to +1V. The startup and shutdown sequences can be controlled through SPI or using one of the three preset stand-alone modes. The device is optimized for low EMI. Peak interference is reduced by using the spread-spectrum feature. Spread spectrum is always enabled for the buck converter, but enabled through an external input (SSEN) for the boost and Cuk converters. Additional EMI enhancement is achieved by running the boost and Cuk converters 180° out-of-phase. The device includes a control output for an nMOS switch to enable flexible sequencing of the negative VSL output. A drive output is also included for a series pMOS switch for ...