The TPS65175B/C provides a simple and economic power supply solution for a wide variety of LCD bias applications. The device provides all supply rails needed by a TFT-LCD panel but also 6 gamma references, a supply rail for LVDS support, as well as a Vcom reference. The device also integrates a VCOM_DAC rail providing the reference for an external non-inverting operational amplifier input. A 12-Channel Level Shifter is also integrated. The solution is delivered in a small 7×7 mm QFN package.

The TPS65175B/C provides a simple and economic power supply solution for a wide variety of LCD bias applications. The device provides all supply rails needed by a TFT-LCD panel. VCC and RST for the T-Con. VDD and HVDD for the Source Driver. VGH and VGL for the Gate Driver or the Level Shifters. A VCOM operational amplifier is also integrated to provide a common plane reference. The VGH and VCOM / VCOM_DAC voltages can be compensated for low and high temperatures. The transition from one programmed value to another is made using an external thermistor connected to the IC. In addition, a 6-channel Gamma Buffer as well as a 12-Channel Level Shifter are integrated. All output rails and delay times are programmable by a two-wire interface: a single BOM (Bill of Material) can cover several panel types and sizes whose desired output levels can be programmed in production and stored in a non-volatile memory embedded into the TPS65175B/C. The solution is delivered in a small 7 mm × 7 mm QFN-56 package.

• 8.6V to 14.7V Input Voltage Range
• Boost Converter VDD: 12.7V…19V (6-Bit)
• Integrated Input-to-Output Isolation Switch
• Buck Converter HVDD: VDD Tracking
• Buck Converter VCC: 1.6V...2.0V & 3.0V…3.6V (4-Bit)
• Positive Charge Pump VGH:
  • 19V…34V for Low Temperature (4-Bit)
  • 17V…32V for High Temperature (4-Bit)
• Negative Charge Pump VGL: –1.8V…–8.1V (6-Bit)
• 6-Ch Gamma Buffer:
  • 3-Ch: VDD…HVDD (9-Bit)
  • 3-Ch: HVDD...GND (9-Bit)
• 9-Bit VCOM Reference
• 3-Bit VCOM Gain
• VCOM_DAC Output for External Operational Amplifier Reference
• Temperature Compensation for VGH and VCOM
• Reset Signal with Programmable Delay Time
• Programmable Sequencing Delays (4 × 3-Bit)
• Thermal Shutdown
• 12-Channel Level Shifters:
  • Supports Forward and Reverse Operation
  • Abnormal Operation Detection
• 56-Pin 7-mm × 7-mm QFN Package

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