TPS23730EVM-093

www.ti.com Table of Contents User's Guide TPS23730EVM-093 Evaluation Module ABSTRACT This user’s guide describes the TPS23730 evaluation module (EVM). The TPS23730 evaluation module (TPS23730EVM-093) contains evaluation and reference circuitry for the TPS23730, which is a IEEE802.3bt Type 3 PoE PD, EA Gen 2 Ready, controller suitable for Type 3 (51 W) PoE PD applications. The TPS23730EVM-093 is targeted for a 12-V active clamp forward high efficiency 50-W solution. Table of Contents 1 Introduction.............................................................................................................................................................................3 2 Electrical Specifications........................................................................................................................................................ 3 3 Description.............................................................................................................................................................................. 4 4 Schematic and Bill of Materials.............................................................................................................................................5 5 General Configuration and Description................................................................................................................................7 6 TPS23730EVM-093 Performance Data.................................................................................................................................. 8 7 EVM Assembly Drawings and Layout Guidelines............................................................................................................. 14 8 Bill of Materials..................................................................................................................................................................... 16 9 Revision History................................................................................................................................................................... 27 List of Figures Figure 4-1. TPS23730EVM-093 Schematic Page One............................................................................................................... 5 Figure 4-2. TPS23730EVM-093 Schematic Page Two................................................................................................................6 Figure 6-1. Startup Response When Connected to a PoE PSE..................................................................................................8 Figure 6-2. DC/DC Startup.......................................................................................................................................................... 9 Figure 6-3. Shutdown Waveform 10-A Load................................................................................................................................9 Figure 6-4. Shutdown Waveform 0-A Load..................................................................................................................................9 Figure 6-5. Shutdown Waveform Primary MOSFET with 10-A Load ........................................................................................10 Figure 6-6. Shutdown Waveform Primary MOSFET with 0-A Load ..........................................................................................10 Figure 6-7. Shutdown Waveform Synchronous MOSFET with 10-A Load ............................................................................... 10 Figure 6-8. Shutdown Waveform Synchronous MOSFET with 0-A Load ................................................................................. 11 Figure 6-9. Shutdown Waveform Secondary Series MOSFET 10-A Load................................................................................ 11 Figure 6-10. Shutdown Waveform Secondary Series MOSFET 0-A Load................................................................................ 11 Figure 6-11. Shutdown Waveform Secondary Parallel MOSFET with 10-A Load..................................................................... 12 Figure 6-12. Shutdown Waveform Secondary Parallel MOSFET 0-A Load.............................................................................. 12 Figure 6-13. Efficiency of the TPS23730EVM-093.................................................................................................................... 12 Figure 6-14. TPS23730EVM-093 Load Regulation................................................................................................................... 13 Figure 6-15. DCDC Hiccup Performance during an Output Short............................................................................................. 13 Figure 6-16. Bode Plot Response of the TPS23730EVM-093 with 5-A Load............................................................................13 Figure 7-1. Top-Side Routing and Component Placement........................................................................................................ 14 Figure 7-2. Layer 2 Routing....................................................................................................................................................... 14 Figure 7-3. Layer 3 Routing....................................................................................................................................................... 14 Figure 7-4. Bottom Side Routing and Component Placement...................................................................................................14 List of Tables Table 2-1. TPS23730EVM-093 Electrical and Performance Specifications at 25°C....................................................................3 Table 5-1. Connector Functionality.............................................................................................................................................. 7 Table 5-2. Test Points.................................................................................................................................................................. 7 SLUUC91B – MAY 2020 – REVISED AUGUST 2023 Submit Document Feedback TPS23730EVM-093 Evaluation Module Copyright © 2023 Texas Instruments Incorporated 1 Trademarks www.ti.com Trademarks All trademarks are the property of their respective owners. 2 TPS23730EVM-093 Evaluation Module SLUUC91B – MAY 2020 – REVISED AUGUST 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated www.ti.com Introduction 1 Introduction The TPS23730EVM-093 allows reference circuitry evaluation of the TPS23730 device and contains input and output power connectors and an array of onboard test points for circuit evaluation. 1.1 Features • • • • • IEEE802.3bt Type 3 compliant PoE PD Integrated PWM Controller for Active Clamp Forward Configuration Frequency Dithering for EMI Reduction Soft-Start Control with Advanced Startup and Hiccup Mode Overload Protection Soft-Stop Shutdown 1.2 Applications • • • • • • IEEE 802.3bt Compliant Devices Video and VoIP Telephones Access Points Pass-through System Security Cameras Redundant Power Feeds or Power Sharing 2 Electrical Specifications Table 2-1. TPS23730EVM-093 Electrical and Performance Specifications at 25°C Design Example Specifications Parameter Test Conditions MIN TYP MAX Applied to the PoE Input 37 48 57 Unit Power Interface Input Voltage Range Applied ot the Adapter Input 48 Detection Voltage At device terminals 2.7 Classification Voltage At device terminals 14.5 Classification 10.1 V 20.5 6 Inrush current-limit 140 mA Operating Current Limit 1.85 A DC-to-DC Converter Output Voltage Vin = 48 V, iload