Low-cost, single-IC, triple-output TFT LCD supply

摘要

Avast majority of portable devices today feature thin-film transistor LCD displays. Such displays need to operate from a low-voltage input supply or a battery source, in the range of 3 to 5 volts. A typical TFT LCD bias supply requires a main supply (also referred to as AV_(dd), typically in the range of 8 V to 12 V), a positive gate-drive bias (typically in the range of +12 V to +18 V) and a negative gate-drive bias (typically in the range of-5 V to -10 V).