TPS65640 LCD Bias with Digital VCOM Buffer for Notebook PCs and Tablet PCs | TI.com

TPS65640 (ACTIVE) LCD Bias with Digital VCOM Buffer for Notebook PCs and Tablet PCs

 

Recommended alternative parts

  • TPS65642  -  14ch gamma buffer integrated
  • TPS65642A  -  14ch gamma buffer integrated
  • TPS61177  -  TPS61177 is a backlight driver that was developed for the TPS65640

Description

The TPS65640 is a compact LCD bias solution primarily intended for use in Notebook and Tablet PCs. The device comprises two boost converters to supply the LCD panel’s source driver and gate driver/level shifter; one buck converters or a LDO regulator alternatively to supply the time controller logic voltages; a linear negative voltage regulator to supply gate off voltage or provide negative voltage for source driver; a programmable VCOM generator with one high-speed amplifier; a gate voltage shaping function and two high speed operational amplifiers.

All the regulators and VCOM voltage outputs are programmed through I2C interface and stored in the TPS65640 integrated E2PROM. The TPS65640 is available in 5.5mm × 3.5mm, 28 Leads QFN package.

Features

  • 2.5V to 5.5V Input Voltage Range
  • 3.6 to 12.7V Boost Converter (AVDD)
  • 15 to 37V Boost Converter with Temperature
    Compensation (VGH)
  • –8V to –3.8V Linear Negative Voltage Regulator
    (VGL or NAVDD)
  • 1.5V to 3V Alternative Buck Converter or
    Low Dropout Regulator (V25)
  • 7 bits Programmable VCOM Calibrator with one
    Integrated Buffer Amplifiers
  • 0.8V to 5.1V Programmable VCOM Voltage Output
    for Full AVDD Application
  • –4.1V to 0.2V Programmable VCOM Voltage
    Output for Positive and Negative AVDD Application
  • Two Operational Amplifiers
  • Gate Voltage Shaping
  • Programmable VGH and VCOM Temperature
    Compensation
  • TCON Reset Signal Generator with Programmable delay
  • I2C Interface for E2PROM Programming
  • Thermal shutdown
  • Supports GIP and non-GIP displays
  • 28 pins 5.5mm×3.5mm 0.5mm pitch QFN

Parametrics

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Part number Order Display type IC integration Vin (Min) (V) Vin (Max) (V) Source driver voltage (Min) (V) Source driver voltage (Max) (V) Level shifter/scan driver (ch) V_POS (Min) (V) V_POS (Max) (V) V_NEG (Min) (V) V_NEG (Max) (V) Special function Topology Type Rating Package size: mm2:W x L (PKG) Package Group
TPS65640 Order now LCD Bipolar
LCD Unipolar    
LCD Bias
VCOM    
2.5     5.5     -8     12.7     0             Adjustable Sequencing
GPM/GVS
I2C I/F
Output Discharge
Reset Generator
Temperature Sensor/Compensation
VCOM/OpAmp    
        Catalog     28WQFN: 19 mm2: 3.5 x 5.5 (WQFN | 28)     WQFN | 28    
TPS65100 Order now LCD Unipolar     LCD Bias
VCOM    
2.7     5.8     5     15     0             VCOM/OpAmp             Catalog     24HTSSOP: 34 mm2: 4.4 x 7.8 (HTSSOP | 24)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
HTSSOP | 24
VQFN | 24    
TPS65120 Order now LCD Unipolar     LCD Bias     2.5     5.5     3     5.6     0     3     20     -18     -1.5     Output Discharge             Catalog     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     VQFN | 16    
TPS65149 Order now LCD Unipolar     LCD Bias
LCD Level shifter
VCOM    
3     6     7     18     8             VCOM/OpAmp
I2C I/F
Output Discharge
Reset Generator
Level Shifter
Temperature Sensor/Compensation    
        Catalog     56VQFN: 49 mm2: 7 x 7 (VQFN | 56)     VQFN | 56    
TPS65150 Order now LCD Unipolar     LCD Bias
VCOM    
1.8     6       15     0             VCOM/OpAmp
Adjustable Sequencing
GPM/GVS    
        Catalog     24HTSSOP: 34 mm2: 4.4 x 7.8 (HTSSOP | 24)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
HTSSOP | 24
VQFN | 24