Texas Instruments TPS40193EVM-001 User Manual
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Texas Instruments TPS40193EVM-001 User Manual

Texas Instruments TPS40193EVM-001 User Manual

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The TPS40193EVM-001 evaluation module is a 12V to 1.8V synchronous buck
converter built around the
provides a convenient test platform for both evaluating the TPS40193 controller in a
real application and prototyping synchronous buck converters using the TPS40193
controller.
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TPS40193EVM-001 Switching Waveforms (V
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TPS40193EVM-001 Gain and Phase vs Frequency
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Adjusting V
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Adjusting V
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Bill of Materials
SLUU274 - May 2007
Submit Documentation Feedback
TPS40193
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Using the TPS40193EVM-001
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List of Tables
User's Guide
SLUU274 - May 2007
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Using the TPS40193EVM-001
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Summary of Contents for Texas Instruments TPS40193EVM-001

  • Page 1: Table Of Contents

    User's Guide SLUU274 – May 2007 Using the TPS40193EVM-001 The TPS40193EVM-001 evaluation module is a 12V to 1.8V synchronous buck converter built around the TPS40193 synchronous buck controller. This module provides a convenient test platform for both evaluating the TPS40193 controller in a real application and prototyping synchronous buck converters using the TPS40193 controller.

  • Page 2: Introduction

    Description The TPS40193EVM-001 is designed to use a regulated 12V (8V–14V) bus to produce a regulated 1.8V output at up to 10A of load current. The EVM is designed to demonstrate the capabilities of the TPS40193 in a typical 12V bus to low-voltage application while providing a number of test points for evaluating the TPS40193 in a given application.

  • Page 3: Tps40193Evm-001 Electrical Performance Specifications

    TPS40193EVM-001 Electrical Performance Specifications TPS40193EVM-001 Electrical Performance Specifications Table 1 summarizes the electrical specifications of the TPS40193EVM-001. Table 1. TPS40193EVM-001 Electrical and Performance Specifications PARAMETER SYMBOL CONDITIONS UNITS Input Characteristics Input Voltage Input Current = Min, I = Max 2.85...

  • Page 4: Schematic

    Schematic Schematic Figure 1 shows the schematic for this EVM. See Table 5, the Bill of Materials, for specific values. Figure 1. TPS40193EVM-001 Schematic Using the TPS40193EVM-001 SLUU274 – May 2007 Submit Documentation Feedback...

  • Page 5: General Configuration And Description

    • = 20kΩ Table 2 contains common values for R7 to generate popular output voltages. The TPS40193EVM-001 is stable through these output voltages, but efficiency may suffer because the power stage is optimized for 1.8V output. Table 2. Adjusting V with R7 R7 (kΩ)

  • Page 6: Scp With R9 4 Test Point Descriptions

    4.4.1 Input Voltage Monitoring (TP1, TP2) The TPS40193EVM-001 provides two test points for measuring the voltage applied to the module. These test points allow the user to measure the actual module voltage without losses from input cables and connector losses. All input voltage measurements should be made between TP1 and TP2. To use TP1 and TP2, connect a voltmeter positive terminal to TP1 and negative terminal to TP2.
  • Page 7 4.4.4 Switching Waveforms (TP7, TP8, TP9, TP10) The TPS40193EVM-001 has three test points and a local ground connection (TP7) to monitor the main switching waveforms. Connect an oscilloscope probe to TP8 to monitor the high-side gate drive applied to the gate of Q2. Connect an oscilloscope probe to TP9 to monitor the switch node voltage. The gate-to-source voltage (V ) of the high-side FET can be determined by a math function TP8—TP9 if both...

  • Page 8: Test Setup

    CAUTION The EVM should not be left unattended while powered. WARNING The EVM should not be probed while the fan is not running. Using the TPS40193EVM-001 SLUU274 – May 2007 Submit Documentation Feedback...

  • Page 9: Tps40193Evm-001 Recommended Test Setup

    Figure 2. TPS40193EVM-001 Recommended Test Setup Metal Ground Barrier Probe Tip TP15 TP16 Tip and Barrel V ripple measurement Figure 3. TPS40193EVM-001 Output Ripple Measurement—Tip and Barrel Using TP15 and TP16 SLUU274 – May 2007 Using the TPS40193EVM-001 Submit Documentation Feedback...

  • Page 10: Tps40193Evm-001 Control Loop Measurement Setup

    0V Step 5. Decrease LOAD1 to 0A. Output Ripple Voltage Measurement Procedure Follow these steps to measure the output ripple voltage on the TPS40193EVM-001. Step 1. Increase V from 0V to 12V Step 2. Adjust LOAD1 to desired load between 0A and 10A Step 3.

  • Page 11: Tps40193Evm-001 Typical Performance Data And Characteristic Curves

    TPS40193EVM-001 Typical Performance Data and Characteristic Curves Control Loop Gain and Phase Measurement Procedure Follow these steps to measure the control loop gain and phase on the TPS40193EVM-001. Step 1. Connect 1kHz–1MHz isolation transformer to TP12 and TP13 as shown in Figure Step 2.

  • Page 12: Tps40193Evm-001 Output Voltage Vs Load Current (±0.5% Window Shown)

    = 1.8V 1.801 = 0A 1.799 Load Current (A) LOAD Figure 6. TPS40193EVM-001 Output Voltage vs Load Current (±0.5% Window Shown) Output Voltage Ripple Figure 7. TPS40193EVM-001 Output Voltage Ripple Using the TPS40193EVM-001 SLUU274 – May 2007 Submit Documentation Feedback...

  • Page 13: Tps40193Evm-001 Switching Waveforms

    TPS40193EVM-001 Typical Performance Data and Characteristic Curves Switch Node Ch1: TP9 (SW); Ch2: TP8 (HDRV); Ch3: TP10 (LDRV). Figure 8. TPS40193EVM-001 Switching Waveforms (V = 8V, I = 10A) Ch1: TP9 (SW); Ch2: TP8 (HDRV); Ch3: TP10 (LDRV). Figure 9. TPS40193EVM-001 Switching Waveforms (V...

  • Page 14: Evm Assembly Drawings And Layout

    Unless otherwise specified, these figures illustrate the view from the top side of the PCB. Note: Board layouts are not to scale. These figures are intended to show how the board is laid out; they are not intended to be used for manufacturing TPS40193EVM-001 PCBs. Using the TPS40193EVM-001 SLUU274 – May 2007...

  • Page 15: Tps40193Evm-001 Component Placement

    EVM Assembly Drawings and Layout Figure 12. TPS40193EVM-001 Component Placement TEXAS INSTRUMENTS TPS40193EVM-001 Figure 13. TPS40193EVM-001 Silkscreen SLUU274 – May 2007 Using the TPS40193EVM-001 Submit Documentation Feedback...

  • Page 16: Tps40193Evm-001 Top Copper Layer

    EVM Assembly Drawings and Layout Figure 14. TPS40193EVM-001 Top Copper Layer Figure 15. TPS40193EVM-001 Bottom Copper Layer Using the TPS40193EVM-001 SLUU274 – May 2007 Submit Documentation Feedback...

  • Page 17: Tps40193Evm-001 Internal Layer 1

    EVM Assembly Drawings and Layout Figure 16. TPS40193EVM-001 Internal Layer 1 Figure 17. TPS40193EVM-001 Internal Layer 2 SLUU274 – May 2007 Using the TPS40193EVM-001 Submit Documentation Feedback...

  • Page 18: Bill Of Materials

    IC, Cost Optimized Mid Vin Freq. 300kHz DRC10 TPS40193DRC Texas Sync. Buck controller Instruments -— — PCB, 3 In x 3 In x 0.062 In — HPA238 — — Shunt, 100-mil, Black 0.100 929950-00 Using the TPS40193EVM-001 SLUU274 – May 2007 Submit Documentation Feedback...
  • Page 19 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 20 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPS40193EVM-001...

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