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This User's Guide describes the evaluation module (EVM) for the TPS2378 (TPS2378EVM-105).
TPS2378 is an IEEE802.3at type 2 compliant powered device (PD) controller.
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SLVU682 - March 2012
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Copyright © 2012, Texas Instruments Incorporated
TPS2378 EVM User's Guide
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User's Guide
SLVU682 - March 2012
TPS2378 EVM User's Guide
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Summary of Contents for Texas Instruments TPS2378

  • Page 1: Table Of Contents

    User's Guide SLVU682 – March 2012 TPS2378 EVM User’s Guide This User’s Guide describes the evaluation module (EVM) for the TPS2378 (TPS2378EVM-105). TPS2378 is an IEEE802.3at type 2 compliant powered device (PD) controller. Contents ........................Introduction ......................Features ......................Applications ..................
  • Page 2: Introduction

    Introduction The TPS2378EVM allows reference circuit evaluation of the TI TPS2378 PD controller. The TPS2378 features an auxiliary power detect (APD) input, providing priority for an external power adapter. It also features a 100 V pass transistor, 140 mA inrush current limiting, type-2 indication, auto-retry fault protection, and an open-drain power-good output.
  • Page 3: Description

    4 signature resistance to the PSE. To the right of the TPS2378 (U1) is the switched side of the PD controller. The TPS2378 RTN pin provides inrush limited turn on and charge of the bulk capacitor, C4. During inrush, the TPS2378 CDB pin is pulled low (with respect to the RTN pin).
  • Page 4: Schematic

    TP11 1000pF BZT52C18V IRFL4310 B2100 NOTES NOT USED a. Use for switched RTN b. Use to "OR" second TPS2378 Figure 1. TPS2378EVM Schematic TPS2378 EVM User’s Guide SLVU682 – March 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated...
  • Page 5: General Configuration And Description

    Output connector to load. Connect pin #4 (VDD) to positive input and pin #1 (RTN) to low side of load. Pin #2 (CDB) can be used to inhibit the converter while the TPS2378 output is ramping up. Pin #3 (T2P) can be used to notify the load of when high power source is present.
  • Page 6: Evm Assembly Drawings And Layout Guidelines

    EVM Assembly Drawings and Layout Guidelines PC Drawings The following figures show component placement and layout of the EVM. Figure 3. Top Side Placement TPS2378 EVM User’s Guide SLVU682 – March 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated...
  • Page 7: Top Side Routing

    EVM Assembly Drawings and Layout Guidelines www.ti.com Figure 4. Top Side Routing Figure 5. Layer Two Routing SLVU682 – March 2012 TPS2378 EVM User’s Guide Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated...
  • Page 8: Layer Three Routing

    EVM Assembly Drawings and Layout Guidelines www.ti.com Figure 6. Layer Three Routing Figure 7. Bottom Side Routing TPS2378 EVM User’s Guide SLVU682 – March 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated...
  • Page 9: Layout Guidelines

    Spacing consistent with safety standards like IEC60950 must be observed between the 48-V input voltage rails and between the input and an isolated converter output. • The TPS2378 should be located over split, local ground planes referenced to VSS for the PoE input and to RTN for the switched output. •...
  • Page 10: Bill Of Materials

    IC, IEEE 802.3at PoE High Power PD Controller TPS2378DDA TPS2378DDA IRFL4310 MOSFET, N-ch, 100V, 200-milliOhms SOT223 IRFL4310TRPBF Wurth 749022011 749022011 Electronics PoE Plus Gigabit Ethernet Transfomer S024 H6096NL H6096NL Pulse TPS2378 EVM User’s Guide SLVU682 – March 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated...
  • Page 11 Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization.
  • Page 12 FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
  • Page 13 Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjukku-ku, Tokyo, Japan http://www.tij.co.jp...
  • Page 14 FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated...
  • Page 15 Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization.
  • Page 16 FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
  • Page 17 Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp...
  • Page 18 FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated...
  • Page 19 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.
  • Page 20 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPS2378EVM-105...

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