TPS65160APWPR TPS65160PWPR BIAS POWER SUPPLY FOR TV AND MONITOR TFT LCD PANELS

TPS65160, TPS65160A

BIAS POWER SUPPLY FOR TV AND MONITOR TFT LCD PANELS

FEATURES

• 8-V to 14-V Input Voltage Range

• V_S Output Voltage Range up to 20 V

• 1% Accurate Boost Converter With 2.8-A Switch Current

• 1.5% accurate 1.8-A Step-Down Converter

• 500-kHz/750-kHz Fixed Switching Frequency

• Negative Charge Pump Driver for VGL

• Positive Charge Pump Driver for VGH

• Adjustable Sequencing for VGL, VGH

• Gate Drive Signal to Drive External MOSFET

• Internal and Adjustable Soft Start

• Short-Circuit Protection

• 23-V (TPS65160) Overvoltage Protection

• 19.5-V (TPS65160A) Overvoltage Protection

• Thermal Shutdown

• Available in TSSOP-28 Package

APPLICATIONS

• TFT LCD Displays for Monitor and LCD TV

DESCRIPTION

The TPS65160 offers a compact power supply solution to provide all four voltages required by thin-film transistor (TFT) LCD panel. With its high current capabilities, the device is ideal for large screen monitor panels and LCD TV applications.

The device can be powered directly from a 12-V input voltage generating the bias voltages VGH and VGL, as well as the source voltage VS and logic voltage for the LCD panels. The device consists of a boost converter to provide the source voltage VS and a step-down converter to provide the logic voltage for the system. A positive and a negative charge-pump driver provide adjustable regulated output voltages VGL and VGH to bias the TFT. Both boost and step-down converters, as well as the charge-pump driver, operate with a fixed switching frequency of 500 kHz or 750 kHz, selectable by the FREQ pin. The TPS65160 includes adjustable power-on sequencing. The device includes safety features like overvoltage protection of the boost converter and short-circuit protection of the buck converter, as well as thermal shutdown. Additionally, the device incorporates a gate drive signal to control an isolation MOSFET switch in series with VS or VGH. See the application circuits at the end of this data sheet.

TYPICAL APPLICATION

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted) ⁽¹⁾

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) All voltage values are with respect to network ground terminal.

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