데이터 시트 (TPS23751EVM-104)차례FEATURES1APPLICATIONS1DESCRIPTION1ABSOLUTE MAXIMUM RATINGS2THERMAL INFORMATION3RECOMMENDED OPERATING CONDITIONS3ELECTRICAL CHARACTERISTICS4CONTROLLER SECTION4SLEEP MODE (TPS23752 ONLY)5PoE INTERFACE SECTION6DEVICE INFORMATION7DEVICE FUNCTIONAL BLOCK DIAGRAMS9PIN DESCRIPTION11TYPICAL CHARACTERISTICS15DETAILED DESCRIPTION17PoE OVERVIEW17Threshold Voltages19PoE Startup Sequence20Detection20Hardware Classification21Inrush and Startup22Maintain Power Signature22Startup and Converter Operation22PD Hotswap Operation23Sleep Mode Operation (TPS23752 only)24Converter Controller Features25PWM and VFO Operation; CTL, SRT, and SRD Pin Relationships to Output Load Current25Bootstrap Topology27Current Slope Compensation and Current Limit28RT28T2P, Startup and Power Management28Thermal Shutdown28Adapter ORing28Using DEN to Disable PoE29ORing Challenges29APPLICATION INFORMATION30Input Bridges and Schottky Diodes30Protection, D131Capacitor, C131Detection Resistor, RDEN31Classification Resistor, RCLS31APD Pin Divider Network, RAPD1, RAPD231Setting the PWM-VFO Threshold using the SRT pin31Setting Frequency (RT)31Current Slope Compensation32Voltage Feed-Forward Compensation32Estimating Bias Supply Requirements and Cvc32Switching Transformer Considerations and RVC33T2P Pin Interface34Softstart34Special Switching MOSFET Considerations35Thermal Considerations and OTSD35ESD35Layout35REVISION HISTORY36크기: 1.3메가바이트페이지: 47Language: English매뉴얼 열기