Texas Instruments TPS40345EVM-353 User Manual
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Texas Instruments TPS40345EVM-353 User Manual

Texas Instruments TPS40345EVM-353 User Manual

Evaluation module
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TPS40345EVM-353 Evaluation Module
The TPS40345EVM-353 evaluation module (EVM) is a synchronous buck converter providing a fixed
1.2-V output at up to 20 A from a 12-V input bus. The EVM is designed to start-up from a single supply,
which means no additional bias voltage is required for start-up. The module uses the TPS40345 high-
performance, mid-input voltage synchronous buck controller and TI's NexFET™ high performance
MOSFETs.
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TPS40345EVM-353 Schematic
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SNVU588 - November 2017
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Copyright © 2017, Texas Instruments Incorporated
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TPS40345EVM-353 Evaluation Module
User's Guide
SNVU588 - November 2017
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Summary of Contents for Texas Instruments TPS40345EVM-353

  • Page 1: Table Of Contents

    SNVU588 – November 2017 TPS40345EVM-353 Evaluation Module The TPS40345EVM-353 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.2-V output at up to 20 A from a 12-V input bus. The EVM is designed to start-up from a single supply, which means no additional bias voltage is required for start-up.
  • Page 2 TPS40345EVM-353 Silk Screen (Top View) ................TPS40345EVM-353 Top Copper (Top View) ............... TPS40345EVM-353 Bottom Copper (Top View) ..............TPS40345EVM-353 Internal 1 (X-Ray Top View) ..............TPS40345EVM-353 Internal 2 (X-Ray Top View) List of Tables ............TPS40345EVM-353 Electrical and Performance Specifications .....................

  • Page 3: Description

    Description The TPS40345EVM-353 is designed to use a regulated 12 V (8 V – 14 V) bus voltage to provide a regulated 1.2-V output at up to 20 A of load current. The TPS40345EVM-353 is designed to demonstrate the TPS40345 controller and TI NexFETs in a typical 12-V bus to low-voltage application while providing a number of non-invasive test points to evaluate the performance of the TPS40345 and TI NexFETs in a given application.

  • Page 4: Tps40345Evm-353 Schematic

    TPS40345EVM-353 Schematic www.ti.com TPS40345EVM-353 Schematic For reference only, See Table 3 for specific values Figure 1. TPS40345EVM-353 Schematic TPS40345EVM-353 Evaluation Module SNVU588 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 5: Connector And Test Point Descriptions

    Figure 10). The TPS40345EVM-353 does not dynamically monitor the JP1 status for programming FSS. The TPS40345EVM-353 must be disabled via JP2 or powered down by reducing VIN to less than 3 V to remove or install JP1. Test Point Descriptions Table 2.
  • Page 6 Loop Response Testing (TP5, TP6, TP7, TP8, and R3) The TPS40345EVM-353 provides four test points (2 signal and 2 ground) for measuring the control loop frequency response. This allows the user to measure the actual module loop response without modifying the evaluation board.

  • Page 7: Test Setup

    5.1.6 Other FAN: — The TPS40345EVM-353 evaluation module includes components that can get hot to the touch when operating. Because this evaluation module is not enclosed to allow probing of circuit nodes, TI recommends a small fan capable of 200 lfm – 400 lfm to reduce component temperatures when operating.

  • Page 8: Tps40345Evm-353 Recommended Test Set-Up

    See Tip and Barrel Measurement for Vout ripple LOAD1 1.2V @ Figure 2. TPS40345EVM-353 Recommended Test Set-Up Metal Ground Barrel Probe Tip Tip and Barrel Vout ripple measurement Figure 3. Output Ripple Measurement – Tip and Barrel using TP3 and TP4 TPS40345EVM-353 Evaluation Module SNVU588 –...

  • Page 9: Start-Up/Shutdown Procedure

    If JP1 is installed (FSS enabled), loop response data about the modulation frequency (30 kHz) may be affected. 2. Connect a 1-kHz – 1-MHz isolation transformer to TP5 and TP7 as shown in Figure SNVU588 – November 2017 TPS40345EVM-353 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 10: Equipment Shutdown

    TPS40345EVM-353 Test Data Figure 5 through Figure 10 present typical performance curves for the TPS40345EVM-353. Since actual performance data can be affected by measurement techniques and environmental variables, these curves are presented for reference and may differ from actual field measurements. Efficiency...

  • Page 11: Line And Load Regulation

    I - Load Current - A = 8.0V – 14V, V = 1.2V, I = 0A – 20A Figure 6. TPS40345EVM-353 Output Voltage vs Load Current Output Voltage Ripple Vin = 14V, Vout = 1.2 V, Iout = 20 A Output Ripple = 14V, V = 1.2V, I...

  • Page 12: Switch Node

    - Frequency - kHz = 14V, V = 1.2V, I = 20A, Bandwidth: 73kHz, Phase Margin: 47° Figure 9. TPS40345EVM-353 Gain and Phase vs Frequency TPS40345EVM-353 Evaluation Module SNVU588 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 13: Additional Waveforms

    FSS is enabled. Vin = 14V, Vout = 1.2 V, Iout = 20 A Output Ripple Figure 10. TPS40345EVM-353 Output Ripple With FSS Enabled TPS40345EVM-353 Assembly Drawings and Layout The following figures (Figure 11...

  • Page 14: Tps40345Evm-353 Component Placement (Top View)

    TPS40345EVM-353 Assembly Drawings and Layout www.ti.com Figure 11. TPS40345EVM-353 Component Placement (Top View) Figure 12. TPS40345EVM-353 Silk Screen (Top View) TPS40345EVM-353 Evaluation Module SNVU588 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 15 TPS40345EVM-353 Assembly Drawings and Layout www.ti.com Figure 13. TPS40345EVM-353 Top Copper (Top View) Figure 14. TPS40345EVM-353 Bottom Copper (Top View) SNVU588 – November 2017 TPS40345EVM-353 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 16 TPS40345EVM-353 Assembly Drawings and Layout www.ti.com Figure 15. TPS40345EVM-353 Internal 1 (X-Ray Top View) Figure 16. TPS40345EVM-353 Internal 2 (X-Ray Top View) TPS40345EVM-353 Evaluation Module SNVU588 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 17: Tps40345Evm-353 Bill Of Materials

    TPS40345EVM-353 Bill of Materials www.ti.com TPS40345EVM-353 Bill of Materials Table 3. TPS40345EVM-353 Bill of Materials RefDes Value Description Size Part Number C1, C2 10µF Capacitor, Ceramic, 25V, X7R, 10% 1210 4.7µF Capacitor, Ceramic, 10V, X7R, 20% 0805 1µF Capacitor, Ceramic, 25V, X7R, 20%...
  • Page 18 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
  • Page 19 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
  • Page 20 FCC Interference Statement for Class B EVM devices NOTE: 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.
  • Page 21 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧ください。http:/ /www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 3.4 European Union 3.4.1 For EVMs subject to EU Directive 2014/30/EU (Electromagnetic Compatibility Directive): This is a class A product intended for use in environments other than domestic environments that are connected to a low-voltage power-supply network that supplies buildings used for domestic purposes.
  • Page 22 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2017, Texas Instruments Incorporated...
  • Page 23 IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products;...

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