Texas Instruments LM5175RHFEVM-HD User Manual
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Texas Instruments LM5175RHFEVM-HD User Manual

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LM5175RHF (QFN) EVM
User's Guide
Literature Number: SNVU518
April 2016

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Summary of Contents for Texas Instruments LM5175RHFEVM-HD

  • Page 1 LM5175RHF (QFN) EVM User's Guide Literature Number: SNVU518 April 2016...

  • Page 2: Table Of Contents

    Output Voltage Ripple, 20-MHz Bandwidth ................... 5.4.3 Startup Waveform ......................EVM Documentation ........................ Schematic ......................PCB Layout ......................Bill of Materials .......................... Revision History Table of Contents SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 3: High Density Evm Description

    LM5175RHF (QFN) EVM User Guide High Density EVM Description The LM5175RHFEVM-HD demonstrates a compact buck-boost design using the LM5175 high performance 4-switch buck-boost controller. This evaluation module is designed to operate with input voltage from 5 V to 42 V and provide a regulated 12 V output with load current up to 6 A. The transition...

  • Page 4: Evm Photos

    EVM Photos www.ti.com EVM Photos Figure 1. EVM Top Side Figure 2. EVM Bottom Side LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 5: Signal Connections And Test Point Descriptions

    EN input of a downstream converter to provide sequential startup of multiple regulators. 3.3.4 Enable Voltage Input The LM5175RHFEVM-HD provides a test point for measuring the EN voltage. Shorting this test point to GND disables the converter. The EN/UVLO voltage should not exceed the input voltage. SNVU518 – April 2016...

  • Page 6: Sync Input

    3.3.5 SYNC Input The LM5175RHFEVM-HD provides a test point for applying a synchronization (SYNC) input signal. The free-running switching frequency is set at 400 kHz by resistor RT1. However, the converter aligns in frequency and phase with that of the applied SYNC signal up to 600 kHz. If required, apply an external SYNC signal with a frequency higher than the internal free-running frequency as per the LM5175 device datasheet.

  • Page 7: Test Equipment

    Connect voltmeter 2 at VOUT and GND solder lugs to measure the output voltage. • The output current level can be taken from the electronic load readout (if its accuracy is deemed acceptable). SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 8: Test Procedure

    Decrease load to 0 A. Decrease input source voltage to 0 V to power down. 4.3.2 Control Loop Gain and Phase The resistor R16 on the LM5175RHFEVM-HD is a convenient injection point for loop response analysis. • Set up EVM as described previously.
  • Page 9 0.02 0.03 0.05 0.07 0.4 0.5 5 6 7 8 910 Figure 6. Efficiency vs Output Current for V = 24 V SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 10 Table 4. No Load Input Current (IQ) vs Input Voltage IQ (CCM) IQ (DCM) 35 mA 2.6 mA 22 mA 12 mA 58 mA 41 mA LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 11: Line And Load Regulation

    Figure 9. Line and Load Regulation Bode Plots Fc = 4.5 kHz § 60 Figure 10. Bode Plot for V = 6V, I = 3A SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 12 = 12V, I = 3A Fc = 10 kHz § 77 Figure 12. Bode Plot for V = 24V, I = 3A LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 13: Operating Waveforms

    Figure 18. SW1, SW2, I Waveforms: V = 16 V, V = 12 V, I = 0 A V, I = 5 A SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 14 Figure 24. SW1, SW2, I Waveforms: V = 42 V, V = 12 V, I = 0 A V, I = 5 A LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 15: Output Voltage Ripple, 20-Mhz Bandwidth

    Figure 30. Startup at V = 12 V, I = 4A Figure 29. Startup at V = 12 V, I = 0A SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 16 Figure 31. Startup at V = 24 V, I = 0A Figure 32. Startup at V = 24 V, I = 4A LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 17: Evm Documentation

    0.047µF 220pF AGND 0.022µF AGND LM5175RHFR Copyright © 2016, Texas Instruments Incorporated **FOR SPREAD SPECTRU M MODULATION (DITHER), REPLACE Rcd WITH 0.047µF CAPACITOR Figure 33. EVM Schematic SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 18: Pcb Layout

    EVM is a two-sided design, and it includes positions for input and output bulk capacitors. Figure 34. Top Copper (Top View) Figure 35. Layer 2 (Top View) LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 19 EVM Documentation www.ti.com Figure 36. Layer 3 (Top View) Figure 37. Layer 4 (Top View) SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 20 EVM Documentation www.ti.com Figure 38. Layer 5 (Top View) Figure 39. Bottom Copper (Bottom View) LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 21 EVM Documentation www.ti.com Figure 40. Top Layer Silkscreen (Top View) Figure 41. Bottom Layer Silkscreen (Bottom View) SNVU518 – April 2016 LM5175RHF (QFN) EVM User Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 22: Bill Of Materials

    B&F H1, H2, H5, H6 Standoff, Hex, 0.5"L #4-40 Nylon 1902C Keystone AGND, EN, TRIM, Test Point, SMT 5016 Keystone PGOOD, SYNC LM5175RHF (QFN) EVM User Guide SNVU518 – April 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 23: Revision History

    Revision History www.ti.com Revision History DATE REVISION NOTES April 2016 Initial release. SNVU518 – April 2016 Revision History Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 24 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions.
  • Page 25 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 26 【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 SPACER EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
  • Page 27 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 © 2015, Texas Instruments Incorporated...
  • Page 28 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 29 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments LM5175RHFEVM-HD...

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