TPS65175B Texas instruments

TPS65175B

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TPS65175B

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Описание

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 V_DD: 12.7V…19V (6-Bit)
Integrated Input-to-Output Isolation Switch
Buck Converter HV_DD: V_DD Tracking
Buck Converter V_CC: 1.6V...2.0V & 3.0V…3.6V (4-Bit)
Positive Charge Pump V_GH:
- 19V…34V for Low Temperature (4-Bit)
- 17V…32V for High Temperature (4-Bit)
Negative Charge Pump V_GL: –1.8V…–8.1V (6-Bit)
6-Ch Gamma Buffer:
- 3-Ch: V_DD…HV_DD (9-Bit)
- 3-Ch: HV_DD...GND (9-Bit)
9-Bit V_COM Reference
3-Bit V_COM Gain
V_{COM_DAC} Output for External Operational Amplifier Reference
Temperature Compensation for V_GH and V_COM
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

Display type	LCD unipolar
IC integration	Gamma buffer, LCD bias, LCD level shifter, VCOM
Vin (min) (V)	8.6
Vin (max) (V)	15.5
Applications	13 to 21 inches, 21 inches and above
Source driver voltage (min) (V)	12.7
Source driver voltage (max) (V)	19
Level shifter/scan driver (Ch)	12
V_POS (min) (V)	19
V_POS (max) (V)	34
V_NEG (min) (V)	-8.1
V_NEG (max) (V)	-1.8
Features	GPM or GVS, Gamma buffer, HAVDD, I2C interface, Level shifter, Reset generator, Temperature sensor or compensation, VCOM or op amp
Topology	Boost, Buck
Rating	Catalog
Operating temperature range (°C)	-40 to 85