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UM013042
TDA38540 single-phase Evaluation Board user
manual
40 A single-phase Buck regulator with 1.0 V output
About this document
Scope and purpose
This user manual describes the operation, schematic, and bill of materials (BOM) for the
EVAL_TDA38540_1Vout_1P Evaluation Board.
Detailed application information for TDA38540 is available in the TDA38540 datasheet [1].
Intended audience
This document is intended as a guide for design engineers evaluating TDA38540 performance with the
engineering EVAL_TDA38540_1Vout_1P Evaluation Board.
User manual
Please read the sections "Important notice" and "Warnings" at the end of this document
Revision 1.0
www.infineon.com
2024-06-12
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Summary of Contents for Infineon TDA38540
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Page 1: About This Document
EVAL_TDA38540_1Vout_1P Evaluation Board. Detailed application information for TDA38540 is available in the TDA38540 datasheet [1]. Intended audience This document is intended as a guide for design engineers evaluating TDA38540 performance with the engineering EVAL_TDA38540_1Vout_1P Evaluation Board. User manual Please read the sections “Important notice” and “Warnings” at the end of this document Revision 1.0... -
Page 2: Important Notice
Boards provided by Infineon Technologies. The design of the Evaluation Boards and Reference Boards has been tested by Infineon Technologies only as described in this document. The design is not qualified in terms of safety requirements, manufacturing, and operation over the entire operating temperature range or lifetime. -
Page 3: Safety Precautions
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Safety precautions Safety precautions Note: Please note the following warnings regarding the hazards associated with development systems. Table 1 Safety precautions Warning: The DC link potential of this board is up to 1000 VDC. When measuring voltage waveforms by oscilloscope, high-voltage differential probes must be used. -
Page 4: Table Of Contents
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Table of contents Table of contents About this document ........................1 Important notice ..........................2 Safety precautions .......................... 3 Table of contents ..........................4 Introduction .......................... 5 Single-phase Evaluation Board .................... -
Page 5: Introduction
40 A single-phase Buck regulator with 1.0 V output Introduction Introduction The TDA38540 is a stackable synchronous buck converter, providing a compact, high-performance, and flexible solution in a small 6 mm x 5 mm power QFN package. The key features offered by the TDA38540 are: Standalone or stackable 2-phase, 3-phase, or 4-phase operation with up to 40 A/phase •... -
Page 6: Single-Phase Evaluation Board
• Connections and operating instructions The TDA38540 Evaluation Board requires a single +12 V for the input power and can deliver up to 40 A load current (TDC). The operation modes and OCP limits can be selected through jumpers. Table 2... -
Page 7: Evaluation Board Configuration
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Single-phase Evaluation Board Label Descriptions To use an external VCC, disconnect PVIN and VIN, and connect EXT VCC, VIN with VCC. Apply the external VCC to Ext VCC header (P3). -
Page 8: Layout
The PCB is an eight-layer board (5.00 in. x 3.10 inch) using FR4 material. All layers use 2-ounce copper. The PCB thickness is 0.062 inch. The TDA38540 and other major power components are mounted on the topside of the board. - Page 9 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Single-phase Evaluation Board Figure 3 Mid layer 1 Figure 4 Mid layer 2 Figure 5 Mid layer 3 User manual Revision 1.0 2024-06-12...
- Page 10 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Single-phase Evaluation Board Figure 6 Mid layer 4 Figure 7 Mid layer 5 Figure 8 Mid layer 6 User manual Revision 1.0 2024-06-12...
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Page 11: Schematic
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Single-phase Evaluation Board Schematic PVIN 49.9k 0402 HDR 1x2 Ext 3.3V HDR 1x2 HDR 1x2 HDR 1x2 1C14 4.7uF VCC1 Ext 3.3V 0603 BLACK 1C15 PHASE1 2.2uF... -
Page 12: Bill Of Materials
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Single-phase Evaluation Board Bill of materials Table 3 Bill of materials Reference Value Manufacturer Part number Description Aluminum capacitor, 330 1C12 330 µF Panasonic PCE4439CT-ND µF, 20%, 25 V, SMD... - Page 13 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Single-phase Evaluation Board Reference Value Manufacturer Part number Description 1R25, 1R31, Resistor, 18 kΩ, 1/10 W 5% 18 kΩ Panasonic ERJ-U02J183X 1R38, 1R45 0402 SMD 1R26, 1R32, Resistor, 33 kΩ, 1/10 W 5%...
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Page 14: Typical Operating Waveforms
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Typical operating waveforms = 12.0 V • = 1.0 V • = 0-40 A • Operating conditions: room temperature with no airflow. - Page 15 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 12 Startup at 40 A load (Ch : PV , Ch : VCC, Ch : PGOOD, Ch Figure 13 Pre-bias start-up at 0 A load (Ch...
- Page 16 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 14 ripple at 40 A load, F = 600 kHz (Ch , Ch ), peak to peak V ripple = 21.6 mV...
- Page 17 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 16 ripple at 40 A load, F = 1000 kHz (Ch , Ch ), peak to peak V ripple = 16.4 mV...
- Page 18 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 18 SW node, 40 A load, F = 800 kHz Figure 19 SW node, 40 A load, F = 1000 kHz User manual Revision 1.0...
- Page 19 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 20 Short V when operating with 40 A load, (Ch , Ch , Ch : PGOOD, Ch out1 out2 Figure 21...
- Page 20 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 22 Transient response at 20 A step-load current at 1 A/µs slew rate: I = 0 A to 20 A (Ch ) pk-pk: 59.2 mV, F...
- Page 21 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 24 Transient response at 20 A step-load current at 1 A/µs slew rate: I = 20 A to 40 A (Ch ) pk-pk: 60.8 mV, F...
- Page 22 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 26 Bode plot at I = 40 A. BW = 83 kHz, PM = 69˚, GM = -7 dB, F = 600 kHz, Ramp 6 = 130 m...
- Page 23 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 28 Bode plot at I = 40 A. BW = 82 kHz, PM = 71˚, GM = -12.9 dB, F = 1000 kHz, Ramp 5 =...
- Page 24 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 30 Power loss vs. load current natural convection (12 V , 1.0 V , 150 nH, 600 kHz/800 kHz/1000 kHz, T = 25°C)
- Page 25 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 32 Thermal image of the board at 40 A load TDA38540 = 75°C, L = 55°C, F = 600 kHz, T = 26°C, natural convection Figure 33 Thermal image of the board at 40 A load TDA38540 = 81.4°C, L = 58°C, F...
- Page 26 TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Typical operating waveforms Figure 34 Thermal image of the board at 40 A load TDA38540 = 88°C, L = 60°C, F = 1000 kHz, T 26°C, natural convection User manual Revision 1.0...
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Page 27: References
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output References References [1] Infineon Technologies AG: TDA38540 OptiMOS™ IPOL 40 A single-voltage synchronous buck regulator datasheet. User manual Revision 1.0 2024-06-12... -
Page 28: Revision History
TDA38540 single-phase Evaluation Board user manual 40 A single-phase Buck regulator with 1.0 V output Revision history Revision history Document Date Description of changes revision V 1.0 2024-06-12 Initial release User manual Revision 1.0 2024-06-12... -
Page 29: Disclaimer
For information on the types in question please contact your nearest Published by Infineon Technologies office. Except as otherwise explicitly approved by Infineon Infineon Technologies AG Technologies in a written document signed by 81726 Munich, Germany authorized...
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