Мікросхема TPS65171

TPS65171

1FEATURES APPLICATIONS 2• 8.5V to 14.7V Input Voltage Range • LCD TV Panel with ASG Technology • VS Output Voltage Range up to 19V DESCRIPTION • Boost Converter with 2.5A Switch Current The TPS65171 offers a compact power supply • Step Down Converter with 1A Switch Current solution to provide all voltages required by a LCD and Adjustable Output 2.5V to 3.3V panel for large TV panel applications running from a • 750kHz Fixed Switching Frequency 12V supply rail. The device is optimized to support • Temperature Compensated Negative Supply LCD technology using ASG gate drive circuits. • High Voltage Stress Test (HVS) The device generates all voltage rails for the TFT • Adjustable Sequencing LCD bias (VS, VONE, VOFFE, VSS). In addition to that it includes a step-down converter (Vlogic) to provide the • Gate Drive Signal for Isolation Switch logic voltage. By pulling the HVS pin high an • Short Circuit Protection implemented high voltage stress test feature • Internal Soft-Start programs the boost converter output voltage Vs to higher values. The boost converter operates at a • 180° Phase Shift Between Buck and Boost fixed switching frequency of 750kHz. The positive • P2P Short/Open Certified charge pump is running from the boost converter and • Optimized Dual Layer PCB Layout is regulated by an external transistor. A buck-boost • Low EMI converter provides an adjustable temperature dependent negative output voltage VOFFE. The • Undervoltage Lockout negative output voltage VSS is regulated by a shunt • Thermal Shutdown regulator. • Available in 6×6mm 40 Pin QFN Package Safety features like overvoltage protection of the buck-boost input voltage, the boost and buck output TYPICAL APPLICATION voltage, undervoltage lockout, short circuit protection of VONE, VOFFE, and Vlogic are included as well as thermal shutdown.