Catalog(1 parts)
| Part | Mounting Type | Applications | Current - Supply▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Package / Case | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|
Surface Mount | LCD TV/Monitor | 0.0010000000474974513 A | -40 °C | 85 °C | 28-VFQFN Exposed Pad | 8.600000381469727 V | 14.699999809265137 V | 28-VQFN (5x5) |
Key Features
• 8.6V to 14.7V Input Voltage Range2.8A Boost Converter Switch Current LimitBoost Converter Output Voltages up to 18.5VBoost and Buck Converter Short-Circuit Protection1.5A Buck Converter Switch Current LimitFixed 750kHz Switching Frequency for Buck and Boost ConvertersFixed Buck Converter Soft-StartProgrammable Boost Converter Soft-StartTwo Charge Pump Controllers to Regulate VGHand VGLControl Signal for External High-Side MOSFET Isolation SwitchReset Signal With Programmable Reset Pulse DurationThermal Shutdown28-Pin 5×5 mm QFN PackageAPPLICATIONSLCD TVs and Monitors8.6V to 14.7V Input Voltage Range2.8A Boost Converter Switch Current LimitBoost Converter Output Voltages up to 18.5VBoost and Buck Converter Short-Circuit Protection1.5A Buck Converter Switch Current LimitFixed 750kHz Switching Frequency for Buck and Boost ConvertersFixed Buck Converter Soft-StartProgrammable Boost Converter Soft-StartTwo Charge Pump Controllers to Regulate VGHand VGLControl Signal for External High-Side MOSFET Isolation SwitchReset Signal With Programmable Reset Pulse DurationThermal Shutdown28-Pin 5×5 mm QFN PackageAPPLICATIONSLCD TVs and Monitors
Description
AI
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 VGHand 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 VGHand 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.