The MAX17014 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed-circuit board (PCB) that provides the voltages and features required for thin-film transistor (TFT) liquid-crystal display (LCD) TV panels. The EV kit includes a step-down switching regulator, a step-up switching regulator, a positive two-stage charge pump for the TFT gate-on supply, a negative single-stage charge pump for the TFT gate-off supply, and two high-current operational amplifiers (op amps).
The EV kit operates from a DC supply voltage of +10.8V to +13.2V, as configured. The step-down switching regulator is configured for a +3.3V output providing at least 2A. The step-up switching regulator is configured for a +16V output providing at least 1.5A. The positive charge pump is configured for a +35V output providing at least 50mA. The negative charge pump is configured for a -6V output providing at least 100mA. High-frequency operation (1.2MHz) allows the use of tiny surface-mount components to minimize the thickness of LCD panel designs.
The EV kit features two high-performance operational amplifiers (op amps) designed to drive the LCD backplane (VCOM). Power to the VCOM amplifiers comes from the step-up switching regulator output.
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