Texas Instruments TPS23758EVM-080, User Manual, Page: 1 / 27

User’s Guide
TPS23758EVM-080 Evaluation Module
ABSTRACT
This user’s guide describes the TPS23758 evaluation module (EVM). The TPS23758 evaluation module
(TPS23758EVM-080) contains evaluation and reference circuitry for the TPS23758 device. The TPS23758
device is an IEEE 802.3at Type 1 compliant, powered-device (PD) controller and power supply controller
optimized for primary side regulation flyback converter topologies. The TPS23758EVM-080 is targeted for a 5-V
synchronous-rectified high efficiency 13-W PD solution.
Table of Contents
1 Introduction ............................................................................................................................................................................. 2
2 Electrical Specifications ........................................................................................................................................................ 2
3 Description .............................................................................................................................................................................. 3
4 Schematic ................................................................................................................................................................................ 4
5 General Configuration and Description ................................................................................................................................ 5
6 TPS23758EVM-080 Performance Data .................................................................................................................................. 6
7 EVM Assembly Drawings and Layout Guidelines ............................................................................................................. 12
8 Bill of Materials ..................................................................................................................................................................... 16
9 Revision History ................................................................................................................................................................... 21
List of Figures
Figure 4-1. TPS23758EVM-080 Schematic................................................................................................................................. 4
Figure 6-1. Startup Response When Connected to a PoE PSE (TPS23880)............................................................................. 6
Figure 6-2. DCDC Startup........................................................................................................................................................... 6
Figure 6-3. Transient Response from 100 mA to 1 A for a 48-V Input......................................................................................... 7
Figure 6-4. Efficiency of the TPS23758EVM-080........................................................................................................................ 8
Figure 6-5. TPS23758EVM-080 Load Regulation....................................................................................................................... 9
Figure 6-6. DCDC Recovery from Output Short.......................................................................................................................... 9
Figure 6-7. SRF = 0 Ω................................................................................................................................................................ 10
Figure 6-8. SRF = 100 Ω............................................................................................................................................................ 10
Figure 6-9. SRR = 0 Ω............................................................................................................................................................... 11
Figure 6-10. SRR = 10 Ω........................................................................................................................................................... 11
Figure 7-1. Top-Side Component Placement............................................................................................................................. 12
Figure 7-2. Layer 2 Routing....................................................................................................................................................... 12
Figure 7-3. Layer 3 Routing....................................................................................................................................................... 13
Figure 7-4. Bottom-Side Routing............................................................................................................................................... 13
List of Tables
Table 2-1. TPS23758EVM-080 Electrical and Performance Specifications at 25°C.................................................................... 2
Table 5-1. Connector Functionality.............................................................................................................................................. 5
Table 5-2. Test Points.................................................................................................................................................................. 5
Table 8-1. TPS23758EVM-080 BOM......................................................................................................................................... 16
Trademarks
All trademarks are the property of their respective owners.
www.ti.com Table of Contents
SLVUBO2B – APRIL 2019 – REVISED DECEMBER 2020
Submit Document Feedback
TPS23758EVM-080 Evaluation Module 1
Copyright © 2020 Texas Instruments Incorporated