TPS65167A

具有完全集成的 正极充电泵、LDO 控制器、HVS VDD/VGH 和温度 传感器

The TPS65167 offers a compact power supply solution to provide all voltages required by a LCD panel for large size monitor and TV panel applications running from a 12-V supply rail.

The device generates all 3 voltage rails for the TFT LCD bias Vs, VGL and VGH. In addition to that it includes a step-down converter and a LDO controller to provide two logic voltage rails. The device incorporates a high voltage switch that can be controlled by a logic signal from the external timing controller TCON. This function allows gate voltage shaping for VGH. The device also features a high voltage stress test where the output voltage of VGH is set to typically 30 V and the output voltage of Vs is programmable to any higher voltage. The high voltage stress test is enabled by pulling the HVS pin high. The device consists of a boost converter to provide the source voltage Vs operating at a fixed switching frequency of 750 kHz. A fully integrated positive charge pump, switching automatically between doubler and tripler mode provides an adjustable regulated TFT gate on voltage VGH. A negative charge pump driver provides adjustable regulated output voltages VGL. To minimize external components the charge pumps for VGH and VGL operate at a fixed switching frequency of 1.5 MHz. The device includes safety features like overvoltage protection of the boost converter, short-circuit protection of VGH and VGL as well as thermal shutdown.

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6 V to 14 V Input Voltage Range

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Vs Output Voltage Range up to 19 V

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Boost Converter With 3.5-A Switch Current

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Boost Converter Overvoltage Protection

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2.5-A Step-Down Converter With 3.3-V Fixed or Adjustable Output

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750 kHz Fixed Switching Frequency

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150 mA Negative Charge Pump Driver for VGL

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50 mA Positive Charge Pump for VGH

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LDO Controller for Logic Supply

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Gate Voltage Shaping for VGH

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Temperature Sensor Output

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TPS65167 - High Voltage Stress Test Vs

and VGH

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- High Voltage Stress Test Vs only

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Adjustable Sequencing

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Gate Drive Signal for Isolation Switch

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Short-Circuit Protection

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Internal Soft-start

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Thermal Shutdown

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Available in 6 × 6 mm 40 Pin QFN Package

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APPLICA ONS

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LCD TV Panel

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LCD Monitor