Inicio Gestión de la energía Controladores y alimentación para pantallas LCD y OLED
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Gestión de la energía
Controladores y alimentación para pantallas LCD y OLED

TPS65170

COMPRA POR ÚLTIMA VEZ

Polarización LCD de 4 canales con reguladores para bomba de carga externa

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TPS65170

COMPRA POR ÚLTIMA VEZ
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Detalles del producto

Display type LCD unipolar IC integration LCD bias Vin (min) (V) 8.6 Vin (max) (V) 14.7 Applications 13 to 21 inches, 21 inches and above Source driver voltage (min) (V) 13 Source driver voltage (max) (V) 18.5 Level shifter/scan driver (Ch) 0 Features Reset generator Topology Boost, Buck Rating Catalog Operating temperature range (°C) -40 to 85
Display type LCD unipolar IC integration LCD bias Vin (min) (V) 8.6 Vin (max) (V) 14.7 Applications 13 to 21 inches, 21 inches and above Source driver voltage (min) (V) 13 Source driver voltage (max) (V) 18.5 Level shifter/scan driver (Ch) 0 Features Reset generator Topology Boost, Buck Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RHD) 28 25 mm² 5 x 5
  • 8.6V to 14.7V Input Voltage Range
  • 2.8A Boost Converter Switch Current Limit
  • Boost Converter Output Voltages up to 18.5V
  • Boost and Buck Converter Short-Circuit Protection
  • 1.5A Buck Converter Switch Current Limit
  • Fixed 750kHz Switching Frequency for Buck and Boost Converters
  • Fixed Buck Converter Soft-Start
  • Programmable Boost Converter Soft-Start
  • Two Charge Pump Controllers to Regulate VGH and VGL
  • Control Signal for External High-Side MOSFET Isolation Switch
  • Reset Signal With Programmable Reset Pulse Duration
  • Thermal Shutdown
  • 28-Pin 5×5 mm QFN Package
  • APPLICATIONS
    • LCD TVs and Monitors
  • 8.6V to 14.7V Input Voltage Range
  • 2.8A Boost Converter Switch Current Limit
  • Boost Converter Output Voltages up to 18.5V
  • Boost and Buck Converter Short-Circuit Protection
  • 1.5A Buck Converter Switch Current Limit
  • Fixed 750kHz Switching Frequency for Buck and Boost Converters
  • Fixed Buck Converter Soft-Start
  • Programmable Boost Converter Soft-Start
  • Two Charge Pump Controllers to Regulate VGH and VGL
  • Control Signal for External High-Side MOSFET Isolation Switch
  • Reset Signal With Programmable Reset Pulse Duration
  • Thermal Shutdown
  • 28-Pin 5×5 mm QFN Package
  • APPLICATIONS
    • LCD TVs and Monitors

The TPS65170 provides a simple and economic power supply solution for a wide variety of LCD bias applications.

In typical display panel applications, the boost converter generates the display panel’s source voltage VS, the buck converter generates the system’s logic supply VLOGIC, and the two charge pump controllers regulate the external charge pumps generating the display transistors’ on and off supplies VGH and VGL.

By using external transistors to regulate the charge pump output voltage, power dissipation in the IC is significantly reduced, simplifying PCB thermal design and improving reliability.

The TPS65170 also provides a reset circuit that monitors the buck converter output (VLOGIC) and generates a reset signal for the timing controller during power-up.

A control signal can also be generated to control an external MOSFET isolation switch located between the output of the boost converter and the display panel.

The TPS65170 provides a simple and economic power supply solution for a wide variety of LCD bias applications.

In typical display panel applications, the boost converter generates the display panel’s source voltage VS, the buck converter generates the system’s logic supply VLOGIC, and the two charge pump controllers regulate the external charge pumps generating the display transistors’ on and off supplies VGH and VGL.

By using external transistors to regulate the charge pump output voltage, power dissipation in the IC is significantly reduced, simplifying PCB thermal design and improving reliability.

The TPS65170 also provides a reset circuit that monitors the buck converter output (VLOGIC) and generates a reset signal for the timing controller during power-up.

A control signal can also be generated to control an external MOSFET isolation switch located between the output of the boost converter and the display panel.
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Documentación técnica

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Tipo Título Fecha
* Data sheet LCD Bias Supply datasheet 15 oct 2009
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 28 oct 2022
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 dic 2015
User guide TPS65170 Evaluation Module 28 abr 2010
Application note Minimizing Ringing at the Switch Node of a Boost Converter 15 sep 2006

Diseño y desarrollo

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Placa de evaluación

TPS65170EVM-559 — Módulo de evaluación TPS65170 para alimentación de polarización LCD

The TPS65170EVM-559 is a fully assembled and tested circuit for evaluating the TPS65170 LCD Bias Supply. Supplied with an input voltage of 8V to 14.7V, the TPS65170EVM-559 generates an output voltage of 15.5V with a switch current limit of 2.8A minimum and an output voltage of 3.3V with a switch (...)
Guía del usuario: PDF
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Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

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 (...)
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VQFN (RHD) 28 Ver opciones
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