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User's Guide
TPS40077 Buck Controller Evaluation Module User's
Guide
The TPS40077EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.8-V
output at up to 10 A from a 12-V input bus. The EVM is designed to start up from a single supply; no additional
bias voltage is required for start-up. The TPS40077 reduced-pin count synchronous buck controller used in
the EVM employs predictive gate drive. This feature provides improved efficiency by eliminating shoot-through
switching current,and minimizing the reverse-conduction time of the synchronous rectifier FET.
1
Introduction.............................................................................................................................................................................2
1.1 Description.........................................................................................................................................................................
1.2
Applications........................................................................................................................................................................2
1.3 Features.............................................................................................................................................................................
2 TPS40077EVM-001 Electrical Performance Specifications................................................................................................
3
Schematic................................................................................................................................................................................4
3.1 Adjusting Output Voltage (R3 and R13).............................................................................................................................
3.2 Disable (J3)........................................................................................................................................................................
Up.........................................................................................................................................................................5
Setup................................................................................................................................................................6
Procedure..........................................................................................................................................7
3.6 Control Loop Gain and Phase Measurement Procedure...................................................................................................
3.7 Equipment Shutdown.........................................................................................................................................................
4.1
Efficiency............................................................................................................................................................................9
4.2 Line and Load Regulation..................................................................................................................................................
4.3 Output Ripple...................................................................................................................................................................
4.4 Transient Response.........................................................................................................................................................
Plot..........................................................................................................................................................................11
Materials.....................................................................................................................................................................14
7 Revision History...................................................................................................................................................................
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SLVU192B - FEBRUARY 2007 - REVISED JANUARY 2022
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ABSTRACT
Table of Contents
Layout.................................................................................................................................12
Copyright © 2022 Texas Instruments Incorporated
Curves...............................................................................9
TPS40077 Buck Controller Evaluation Module User's Guide
Table of Contents
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Summary of Contents for Texas Instruments TPS40077
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Page 1: Table Of Contents
10 A from a 12-V input bus. The EVM is designed to start up from a single supply; no additional bias voltage is required for start-up. The TPS40077 reduced-pin count synchronous buck controller used in the EVM employs predictive gate drive. This feature provides improved efficiency by eliminating shoot-through switching current,and minimizing the reverse-conduction time of the synchronous rectifier FET. -
Page 2: Introduction
The TPS40077EVM-001 is designed to use a 12-V (8 V-to-16 V) bus to produce a high current, regulated 1.8-V output at up to 10 A of load current. The TPS40077EVM-001 demonstrates the use of the TPS40077 in a typical 12-V bus to low-voltage application, while providing a number of test points to evaluate the performance of the TPS40077. -
Page 3: Tps40077Evm-001 Electrical Performance Specifications
Dimensions (active area) Width Length Component height 0.41 NOTE 1: Voltage accuracy effected by resistor tolerance. SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 TPS40077 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 4: Schematic
3 Schematic For reference only. See Table 6-1 for specific values. Figure 3-1. TPS40077EVM-001 Schematic TPS40077 Buck Controller Evaluation Module User's Guide SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 5: Adjusting Output Voltage (R3 And R13)
The TPS40077EVM-001 provides a Disable input (J3) that allows the user to evaluate the Enable/Disable function of the TPS40077. When a short is applied across the pins of J3, the TPS40077 controller is disabled and the EVM shuts down. When the TPS40077 is disabled, both FET drivers are off. -
Page 6: Equipment Setup
Figure 3-3. 7. Connect an oscilloscope probe to TP9 and TP10 as shown in Figure 3-2. TPS40077 Buck Controller Evaluation Module User's Guide SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 7: Start-Up/Shut Down Procedure
2. Vary LOAD1 from 0 A –10 A 3. Vary V from 8 V to 16 V 12V_IN SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 TPS40077 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 8: Control Loop Gain And Phase Measurement Procedure
3.7 Equipment Shutdown 1. Shut down the oscilloscope. 2. Shut down LOAD1. 3. Shut down V 12V_IN TPS40077 Buck Controller Evaluation Module User's Guide SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 9: Tps40077Evm Typical Performance Data And Characteristic Curves
= 12.0 V 1.750 I - Load Current - A Figure 4-2. TPS40077EVM-001 Line and Load Regulation SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 TPS40077 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 10: Output Ripple
= 1 2 V , V = 1 . 8 V Figure 4-4. Load Transient, 2 A to 10 A TPS40077 Buck Controller Evaluation Module User's Guide SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 11: Bode Plot
Phase margin = 52.5 ° –48 –180 1000 Frequency - kHz Figure 4-6. Typical Bode Plot SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 TPS40077 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Evm Assembly Drawings And Layout
2-oz copper-clad circuit board, with all components on the top side to allow the user to easily view, probe, and evaluate the TPS40077 in a practical application. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space-constrained systems. - Page 13 EVM Assembly Drawings and Layout Figure 5-3. TPS40077EVM-001 Bottom Copper (X-Ray View from Top) SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 TPS40077 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
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Page 14: List Of Materials
Updated the numbering format for tables, figures, and cross-references throughout the document....2 • Updated the user's guide title..........................TPS40077 Buck Controller Evaluation Module User's Guide SLVU192B – FEBRUARY 2007 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 15 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 16 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 17 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 18 www.ti.com 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. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 19 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 © 2019, Texas Instruments Incorporated...
- Page 20 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...
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