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UM_2307_PL12_2307_172957
EVAL_TDA38812_1VOUT user guide
User guide for TDA38812 evaluation board
About this document
Scope and purpose
The TDA38812 is a synchronous buck regulator, providing a compact, high-performance, and flexible solution
in a small 3 mm x 4 mm QFN package.
Key features offered by the TDA38812 include internal soft-start, precision 0.6 V reference voltage, Power Good,
thermal protection, programmable switching frequency in the range of 600 kHz to 1 MHz, enable input, input
undervoltage lockout (UVLO) for proper start-up, latched-off overvoltage protection (OVP), overcurrent
protection (OCP) and pre-bias start-up.
This user guide contains the schematic and bill of materials for the EVAL_TDA38812_1VOUT engineering
evaluation board. It describes operation and use of the evaluation board itself. Detailed application
information for TDA38812 is available in the TDA38812 datasheet.
Intended audience
This document is intended as a guide for design engineers evaluating TDA38812 performance with the
engineering EVAL_TDA38812_1VOUT demo board.
User Guide
Please read the sections "Important notice" and "Warnings" at the end of this document
V 1.0
www.infineon.com/eval-tda38812-1vout
2023-07-21
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Summary of Contents for Infineon EVAL TDA38812 1VOUT
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Page 1: About This Document
Intended audience This document is intended as a guide for design engineers evaluating TDA38812 performance with the engineering EVAL_TDA38812_1VOUT demo board. User Guide Please read the sections “Important notice” and “Warnings” at the end of this document V 1.0 www.infineon.com/eval-tda38812-1vout 2023-07-21... -
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
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Safety precautions Safety precautions Note: Please note the following warnings regarding the hazards associated with development systems Table 1 Safety precautions Caution: The heat sink and device surfaces of the evaluation or reference board may become hot during testing. -
Page 4: Table Of Contents
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Table of contents Table of contents About this document ........................1 Important notice ..........................2 Safety precautions .......................... 3 Table of contents ..........................4 TDA38812 features ......................... 5 Board information ........................6 Evaluation board ............................. -
Page 5: Tda38812 Features
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board TDA38812 features TDA38812 features Features Wide input voltage range: 4 V to 16 V with internal bias and 2.7 V to 16 V with external V (3.3 V) • Precision reference voltage (0.6 V ± 0.5 percent) •... -
Page 6: Board Information
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information Board information Evaluation board Figure 1 Evaluation board Board features = +12 V, V = +1 V at 0 to 12 A = 600 kHz/800 kHz/1000 kHz L = 240 nH = 10 x 22 µF (25 V, ceramic 0805) + 1 x 2.2 µF (25 V, ceramic 0805) + 1 x 330 µF (25 V, electrolytic, optional) = 10 x 47 µF (6.3 V, ceramic 0805) + 1 x 2.2 µF (6.3 V, ceramic 0805) User Guide... -
Page 7: Connections And Operating Instructions
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information Connections and operating instructions The TDA38812 demo board requires a single +12 V for the input power and can deliver up to 12 A load current. The operation modes and OCP limits can be selected through jumpers. Table 2 Connections Label... -
Page 8: Pcb Layout
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information PCB layout Figure 2 Top layer Figure 3 Bottom layer User Guide V 1.0 2023-07-21... - Page 9 EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information Figure 4 Inner layer 1 Figure 5 Inner layer2 User Guide V 1.0 2023-07-21...
- Page 10 EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information Figure 6 Inner layer 3 Figure 7 Inner layer 4 User Guide V 1.0 2023-07-21...
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Page 11: Schematic
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information Schematic Figure 8 Schematic of the TDA38812 evaluation board V = 12 V, V = 1 V, I = 12 A OUTmax User Guide V 1.0 2023-07-21... -
Page 12: Bill Of Materials
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information Bill of materials Table 3 Bill of materials Item Qty Value Part Description Manufacturer Part number reference 220 pF C1 Ceramic capacitor 220 pF 50 V C1005X7R1H221 X7R 0402 10% Corporation K050BA 2.2 µF... - Page 13 EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Board information – SMB straight jack connector Cinch 131-3701-261 50 Ω PCB Connectivity Solutions/ Johnson – Vertical header connector 12- Adam Tech PH2-12-UA position 2.54 mm – Header connector R/A 3- Harwin Inc.
- Page 14 Inboard pin .042" hole Vector K30C/M TP3, TP4, 1000/PKG Electronics TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12, TP13, TP18, TP19, TP20, TP21, TP22, TP23, TP24, TP25 TDA38 TDA38812 12 A single-voltage Infineon TDA38812 synchronous buck regulator User Guide V 1.0 2023-07-21...
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Page 15: Evaluation Board Test Results
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Evaluation board test results Evaluation board test results Typical efficiency and power loss curves = 12 V, V = internal LDO, I = 0 A – 12 A, F = 800 kHz, room temperature, natural convection. Note that the efficiency and power loss curves include losses of the TDA38812, inductor losses, losses of the input and output capacitors, and PCB trace losses. -
Page 16: Typical Operating Waveforms
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Evaluation board test results Figure 10 Output voltage regulation Typical operating waveforms = 12.0 V, V = 1 V, I = 12 A, F = 800 kHz, room temperature, no air flow Figure 11 Start-up at 12 A load, (Ch1: V , Ch2: V... - Page 17 EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Evaluation board test results Figure 12 Pre-bias start-up at 0 A load, (Ch1: V , Ch2: V , Ch3: P ,Ch4: enable) GOOD Figure 13 ripple at 12 A load, F = 800 kHz, (Ch2: V User Guide V 1.0...
- Page 18 EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Evaluation board test results Figure 14 SW node jitter, 12 A load, F = 800 kHz Figure 15 SW node (in DEM), 1 A load User Guide V 1.0 2023-07-21...
- Page 19 EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Evaluation board test results Figure 16 Short-circuit and UVP (hiccup), (Ch2: V , Ch3: P GOOD Figure 17 Transient response at 4 A step load current at 10 A/µs slew rate: I = 4 A –...
- Page 20 EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Evaluation board test results Switching frequency vs. load current 1100 1050 1000 Load current (A) Fsw_12Vin_600kHz Fsw_12Vin_800kHz Fsw_12Vin_1000kHz Figure 18 Switching frequency vs. load current Switching frequency vs. input voltage = 10 A 1200 1000 1Vout, 600KHz...
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Page 21: Tda38812 Thermal Images With No Air Flow And 25°C Ambient
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Evaluation board test results TDA38812 thermal images with no air flow and 25°C ambient Output voltage = 1 V Output voltage = 3.3 V Output voltage = 5 V Figure 20 Thermal performance of TDA38812 for 1 V, 3.3 V and 5 V output voltages, 12 A load, FCCM mode, 800 kHz switching frequency, 12 V V User Guide... -
Page 22: Revision History
EVAL_TDA38812_1VOUT user guide User guide for TDA38812 evaluation board Revision history Revision history Document Date of release Description of changes version V 1.0 2023-07-21 Initial release User Guide V 1.0 2023-07-21... - Page 23 Edition 2023-07-21 Due to technical requirements products may contain Published by dangerous substances. For information on the types in question please contact your nearest Infineon Technologies office. Infineon Technologies AG Except as otherwise explicitly approved by Infineon 81726 Munich, Germany...
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