Enclosures, Racks, Cabinets & Panel Products


Linear-regulator power supply for LCD panels

3 May 2006 Enclosures, Racks, Cabinets & Panel Products

The MAX8761 is a complete linear-regulator power-supply solution for thin-film transistor (TFT) LCD panels used in LCD monitors and TVs. Highly integrated to save cost and space, the Maxim device includes a high-performance linear regulator, a positive and a negative charge-pump regulator, built-in power-up sequence control, and a high-current operational amplifier. Additionally, it provides logic-controlled high-voltage switches to control the positive charge-pump output.

The MAX8761's linear regulator directly steps down the input voltage to generate the supply voltage for the source-driver ICs. Output accuracy is 1,6% with a fast transient response. The two built-in charge-pump regulators generate the TFT gate-on and gate-off supplies. The high-current operational amplifier is typically used to drive the LCD backplane (VCOM) and features high-output current (150 mA), fast slew rate (12 V/μs), and wide bandwidth (12 MHz). Its rail-to-rail inputs and output maximise flexibility.

The MAX8761 is available in 24-pin thin QFN package.



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