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TPS65170 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS65170 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 33 page IsolationSwitch Control Boost Converter Buck Converter Positive LDOController Negative LDOController Reset Generator TPS65170 www.ti.com SLVSA27 – OCTOBER 2009 LCD Bias Supply Check for Samples :TPS65170 The TPS65170 also provides a reset circuit that 1 FEATURES monitors the buck converter output (VLOGIC) and • 8.6V to 14.7V Input Voltage Range generates a reset signal for the timing controller • 2.8A Boost Converter Switch Current Limit during power-up. • Boost Converter Output Voltages up to 18.5V A control signal can also be generated to control an • Boost and Buck Converter Short-Circuit external MOSFET isolation switch located between Protection the output of the boost converter and the display panel. • 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 DESCRIPTION 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. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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