TPS65148 Series
4-CH LCD Bias w/ GPM, VCOM, Reset, LCD Discharge, HVS, Ext. Isolation Switch & LDO for Gamma
Manufacturer: Texas Instruments
Catalog(0 parts)
| Part |
|---|
No parts found Try adjusting your search criteria |
Key Features
• 2.5V to 6V Input Voltage RangeUp to 18V Boost Converter With 4A Switch Current630kHz/1.2MHz Selectable Switching FrequencyAdjustable Soft-Start for the Boost ConverterGate Driver for External Input-to-Output Isolation Switch0.5% Accuracy Voltage Regulator for Gamma BufferGate Voltage ShapingVCOM BufferReset Function (XAOSignal)LCD Discharge FunctionOvervoltage ProtectionOvercurrent ProtectionThermal Shutdown32-Pin 5∗5mm QFN PackageAPPLICATIONSMonitorTV (5V Input Voltage)2.5V to 6V Input Voltage RangeUp to 18V Boost Converter With 4A Switch Current630kHz/1.2MHz Selectable Switching FrequencyAdjustable Soft-Start for the Boost ConverterGate Driver for External Input-to-Output Isolation Switch0.5% Accuracy Voltage Regulator for Gamma BufferGate Voltage ShapingVCOM BufferReset Function (XAOSignal)LCD Discharge FunctionOvervoltage ProtectionOvercurrent ProtectionThermal Shutdown32-Pin 5∗5mm QFN PackageAPPLICATIONSMonitorTV (5V Input Voltage)
Description
AI
The TPS65148 offers a compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 5 V supply rail. The device integrates a high power step-up converter for VS(Source Driver voltage), an accurate voltage rail using an integrated LDO to supply the Gamma Buffer (VREG_O) and a Vcom buffer driving the LCD backplane. In addition to that, a gate voltage shaping block is integrated. The VGHsignal (Gate Driver High voltage) supplied by an external positive charge pump, is modulated into VGHMwith high flexibility by using a logic input VFLK and an external discharge resistor connected to the RE pin. Also, an external negative charge pump can be set using the boost converter of the TPS65148 to generate VGL(Gate Driver Low voltage). The integrated reset function together with the LCD discharge function available in the TPS65148 provide the signals enabling the discharge of the LCD TFT pixels when powering-off. The device includes safety features like overcurrent protection (OCP) and short-circuit protection (SCP) achieved by an external input-to-output isolation switch, as well as overvoltage protection (OVP) and thermal shutdown.
The TPS65148 offers a compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 5 V supply rail. The device integrates a high power step-up converter for VS(Source Driver voltage), an accurate voltage rail using an integrated LDO to supply the Gamma Buffer (VREG_O) and a Vcom buffer driving the LCD backplane. In addition to that, a gate voltage shaping block is integrated. The VGHsignal (Gate Driver High voltage) supplied by an external positive charge pump, is modulated into VGHMwith high flexibility by using a logic input VFLK and an external discharge resistor connected to the RE pin. Also, an external negative charge pump can be set using the boost converter of the TPS65148 to generate VGL(Gate Driver Low voltage). The integrated reset function together with the LCD discharge function available in the TPS65148 provide the signals enabling the discharge of the LCD TFT pixels when powering-off. The device includes safety features like overcurrent protection (OCP) and short-circuit protection (SCP) achieved by an external input-to-output isolation switch, as well as overvoltage protection (OVP) and thermal shutdown.