Integrated TFT Panel Power Supply with Gate Modulation and VCOM

The ADD8733 is a 4-channel regulator with two VCOM amplifiers and gate pulse modulation (GPM) that provides all the necessary voltages for thin film transistor (TFT) liquid crystal displays (LCD). Included is a step-up regulator, a step-down regulator for digital logic, two VCOM amplifiers, two charge-pump regulators for VGH and VGL, and an integrated gate pulse modulator.

By offering a complete power integration solution optimized for TFT LCD TVs and monitors, the ADD8733 helps to lower cost, simplify board design, and increase performance over existing solutions. The ADD8733 is offered in a 48-lead RoHS compliant LFCSP and is specified over the industrial temperature range of −40°C to +85°C.

Applications

* TFT LCD panels for TVs and monitors

* Step-up switching regulator with 3 A switch current limit 8 V to 16.5 V input voltage range Adjustable output voltage up to 20 V 1.2 A series switch for power sequencing Overvoltage protection (OVP) * Step-down switching regulator with 3 A switch current limit 8 V to 16.5 V input voltage range Adjustable output voltage down to 2.5 V * Gate pulse modulator circuitry Independently adjustable delay and falling slope