Home Power management LCD & OLED display power & drivers
Home
Power management
LCD & OLED display power & drivers

TPS65148

ACTIVE

4-CH LCD Bias w/ GPM, VCOM, Reset, LCD Discharge, HVS, Ext. Isolation Switch & LDO for Gamma

Order now
Data sheet

TPS65148

ACTIVE
Data sheet Order now

Product details

Display type LCD unipolar IC integration LCD bias, VCOM Vin (min) (V) 2.5 Vin (max) (V) 6 Applications 13 to 21 inches, 7 to 13 inches Source driver voltage (min) (V) 7 Source driver voltage (max) (V) 18 Level shifter/scan driver (Ch) 0 V_POS (max) (V) 18 Features GPM or GVS, Output discharge, Reset generator, VCOM or op amp Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
Display type LCD unipolar IC integration LCD bias, VCOM Vin (min) (V) 2.5 Vin (max) (V) 6 Applications 13 to 21 inches, 7 to 13 inches Source driver voltage (min) (V) 7 Source driver voltage (max) (V) 18 Level shifter/scan driver (Ch) 0 V_POS (max) (V) 18 Features GPM or GVS, Output discharge, Reset generator, VCOM or op amp Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RHB) 32 25 mm² 5 x 5
  • 2.5V to 6V Input Voltage Range
  • Up to 18V Boost Converter With 4A Switch Current
  • 630kHz/1.2MHz Selectable Switching Frequency
  • Adjustable Soft-Start for the Boost Converter
  • Gate Driver for External Input-to-Output Isolation Switch
  • 0.5% Accuracy Voltage Regulator for Gamma Buffer
  • Gate Voltage Shaping
  • VCOM Buffer
  • Reset Function (XAO Signal)
  • LCD Discharge Function
  • Overvoltage Protection
  • Overcurrent Protection
  • Thermal Shutdown
  • 32-Pin 5∗5mm QFN Package
  • APPLICATIONS
    • Monitor
    • TV (5V Input Voltage)
  • 2.5V to 6V Input Voltage Range
  • Up to 18V Boost Converter With 4A Switch Current
  • 630kHz/1.2MHz Selectable Switching Frequency
  • Adjustable Soft-Start for the Boost Converter
  • Gate Driver for External Input-to-Output Isolation Switch
  • 0.5% Accuracy Voltage Regulator for Gamma Buffer
  • Gate Voltage Shaping
  • VCOM Buffer
  • Reset Function (XAO Signal)
  • LCD Discharge Function
  • Overvoltage Protection
  • Overcurrent Protection
  • Thermal Shutdown
  • 32-Pin 5∗5mm QFN Package
  • APPLICATIONS
    • Monitor
    • TV (5V Input Voltage)

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 VGH signal (Gate Driver High voltage) supplied by an external positive charge pump, is modulated into VGHM with 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 VGH signal (Gate Driver High voltage) supplied by an external positive charge pump, is modulated into VGHM with 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.
open-in-new Find other LCD & OLED display power & drivers
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Similar functionality to the compared device
TPS65149 ACTIVE LCD Bias Solution For LCD Panels Using ASG/GIP Technology This product has no voltage regulator for gamma, adds an 8 ch level shifter and has a programmable Vcom and Vgl.
TPS65155 ACTIVE LCD Bias Solution with Level Shifters for GOA Panels This product has no voltage regulator for gamma, adds an 8 ch level shifter and Vgl.

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet Compact TFT LCD Bias IC with VCOM Buffer, Voltage Regulator and Reset Function datasheet (Rev. A) 19 Jan 2011
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) 19 Sep 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Generation of a VCOM buffer input using PWM signal 21 Dec 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Request
Package Pins Download
VQFN (RHB) 32 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos