ADD8733

Obsolete

Integrated TFT Panel Power Supply with Gate Modulation and VCOM

Data Sheet (Rev. PrA) Product Selection Table

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Overview

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

Positive charge-pump regulator for VGH
Negative charge-pump regulator for VGL
Two VCOM amplifiers
General
Power supply sequencing
Thermal fault protection
650 kHz or 1.2 MHz PWM frequency
Soft start
Undervoltage lockout (UVLO)
48-lead RoHS compliant LFCSP

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