Table of Contents
Advertisement
Quick Links
www.ti.com
User's Guide
TPS51220A Buck Controller Evaluation Module User's
Guide
1
Introduction.............................................................................................................................................................................3
2 Description..............................................................................................................................................................................
Applications............................................................................................................................................................3
2.2 Features.............................................................................................................................................................................
3 Electrical Performance Specifications.................................................................................................................................
4
Schematic................................................................................................................................................................................5
Setup................................................................................................................................................................................6
5.1 Test Equipment..................................................................................................................................................................
Setup.................................................................................................................................................6
5.3 List of Test Points...............................................................................................................................................................
6 Test Procedure........................................................................................................................................................................
6.1 Line/Load Regulation and Efficiency Measurement Procedure.........................................................................................
Test..............................................................................................................................................................9
6.3 Measuring Improved Light Load Efficiency........................................................................................................................
7.1 Efficiency..........................................................................................................................................................................
7.2 Load Regulation...............................................................................................................................................................
Plot..........................................................................................................................................................................12
7.4 Transient Response.........................................................................................................................................................
7.5 Output Ripple and Switch Node.......................................................................................................................................
Waveform...........................................................................................................................................................13
Waveform...........................................................................................................................................................14
8 EVM Assembly Drawing and PCB Layout..........................................................................................................................
Materials.....................................................................................................................................................................21
10 Revision History.................................................................................................................................................................
Figure 4-1. TPS51220A EVM-476 Schematic.............................................................................................................................
Figure 5-2. Recommended Tip and Barrel Technique to Measure Output Ripple Voltage..........................................................
Figure 7-9. 5-V CCM Mode Output Ripple and Switch Node....................................................................................................
Figure 7-11. Enable Turn-On Waveform....................................................................................................................................
Figure 7-12. Enable Turn-Off With Discharge Waveform..........................................................................................................
Figure 7-13. Enable Turn-Off Without Discharge Waveform.....................................................................................................
Figure 8-1. Top Layer Assembly Drawing (Top View)................................................................................................................
Figure 8-2. Bottom Assembly Drawing (Top View)....................................................................................................................
Figure 8-3. Top Copper (Top View)............................................................................................................................................
SLUU381B - SEPTEMBER 2009 - REVISED FEBRUARY 2022
Submit Document Feedback
Table of Contents
Select...............................................................................................................................10
Select.......................................................................................................10
Curves.......................................................................................................11
List of Figures
Setup....................................................................................................6
, 5.0-V Output...............................................................................................................................
, 3.3-V Output...............................................................................................................................
Regulation.................................................................................................................................11
Regulation.................................................................................................................................11
Transient...............................................................................................................................12
Transient............................................................................................................................12
Ripple............................................................................................................................13
View)......................................................................................................................................18
Copyright © 2022 Texas Instruments Incorporated
= 95 kHz, PM = 48°...........................................................
CO
= 90 kHz, PM = 63°........................................................
CO
Table of Contents
3
3
3
6
7
8
8
9
11
11
12
13
15
21
5
6
11
11
12
12
13
13
14
14
15
16
17
1
Advertisement
Table of Contents
Related Manuals for Texas Instruments TPS51220A EVM-476
Summary of Contents for Texas Instruments TPS51220A EVM-476
-
Page 1: Table Of Contents
9 List of Materials..................................21 10 Revision History................................. List of Figures Figure 4-1. TPS51220A EVM-476 Schematic..........................Figure 5-1. TPS51220A EVM-476 Recommended Test Setup....................6 Figure 5-2. Recommended Tip and Barrel Technique to Measure Output Ripple Voltage............Figure 7-1. Efficiency, 12 V , 5.0-V Output.......................... - Page 2 Figure 8-6. Bottom Copper (Top View)............................List of Tables Table 3-1. TPS51220A EVM-476 Electrical Performance Specifications..................Table 5-1. Test Point Functions Found on the TPS51220A EVM-476..................Table 6-1. SKIPSEL1 or SKIPSEL2 (jumpers JP1 and JP4) Selections..................9 Table 6-2. FUNC (jumper JP2) Selections..........................10...
-
Page 3: Introduction
2 Description The TPS51220A EVM-476 provides two 8-A outputs: 3.3 V and 5 V. It accepts an input voltage from 8 V to 20 V. Several jumpers and switches allow the user to evaluate various control functions of the TPS51220A. Switches provide an easy method to enable and disable the EVM or each of the two outputs independently. - Page 4 Electrical Performance Specifications www.ti.com Table 3-1. TPS51220A EVM-476 Electrical Performance Specifications (continued) PARAMETER TEST CONDITIONS UNITS Peak efficiency Full load efficiency TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
-
Page 5: Schematic
Schematic 4 Schematic Figure 4-1. TPS51220A EVM-476 Schematic SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 TPS51220A Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 6: Test Setup
5V/8A 12V/10A DC Power Source Electronic Load #2. 3.3V/8A Figure 5-1. TPS51220A EVM-476 Recommended Test Setup Metal Ground Barrel Probe Tip (TP3) (TP8) Figure 5-2. Recommended Tip and Barrel Technique to Measure Output Ripple Voltage TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B –... -
Page 7: List Of Test Points
Test Setup 5.3 List of Test Points Table 5-1. Test Point Functions Found on the TPS51220A EVM-476 TEST POINT NAME DESCRIPTION Measurement point for input voltage with respect to TP18 VOUT1 Measurement point for output 1 voltage with respect to TP7... -
Page 8: Test Procedure
0 A to 8 A. Record VOUT1 voltage using V1, IOUT1 current, VIN using V3 and input current from source for each step. 11. Similar technique can be used for VOUT2. Use S2 to enable VOUT2. TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 9: Output Ripple Test
6.1. The engineer should reduce the step current when the output is less than 1 A. Section 7 shows typical data for the various modes of operation SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 TPS51220A Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 10: Control Architecture And Ovp Select
6.1. The engineer should reduce the step current when the output is less than 1 A. Section 7 shows typical data for the various modes of operation TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 11: Performance Data And Typical Characteristic Curves
Figure 7-3. 12 V , 5.0-V Load Regulation Figure 7-4. 12 V , 3.3-V Load Regulation SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 TPS51220A Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Bode Plot
7.4 Transient Response Figure 7-7. 5-V CCM Mode Load Transient Figure 7-8. 5-V D-CAP Mode Load Transient TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 13: Output Ripple And Switch Node
Figure 7-10. 3.3-V CCM Mode Output Ripple Switch Node 7.6 Turn-On Waveform Figure 7-11. Enable Turn-On Waveform SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 TPS51220A Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 14: Turn-Off Waveform
7.7 Turn-Off Waveform Figure 7-12. Enable Turn-Off With Discharge Figure 7-13. Enable Turn-Off Without Discharge Waveform Waveform TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 15: Evm Assembly Drawing And Pcb Layout
(Figure 8-1 through Figure 8-6) show the design of the TPS51220A EVM-476 printed circuit board. The PCB is 0.062” thick. It uses four layers of copper. The two internal layers are 2-oz copper while the external layers are 1-oz copper. -
Page 16: Figure 8-2. Bottom Assembly Drawing (Top View)
EVM Assembly Drawing and PCB Layout www.ti.com Figure 8-2. Bottom Assembly Drawing (Top View) TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 17: Figure 8-3. Top Copper (Top View)
EVM Assembly Drawing and PCB Layout Figure 8-3. Top Copper (Top View) SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 TPS51220A Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 18: Figure 8-4. Internal Layer 1 (Top View)
EVM Assembly Drawing and PCB Layout www.ti.com Figure 8-4. Internal Layer 1 (Top View) TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 19: Figure 8-5. Internal Layer 2 (Top View)
EVM Assembly Drawing and PCB Layout Figure 8-5. Internal Layer 2 (Top View) SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 TPS51220A Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 20: Figure 8-6. Bottom Copper (Top View)
EVM Assembly Drawing and PCB Layout www.ti.com Figure 8-6. Bottom Copper (Top View) TPS51220A Buck Controller Evaluation Module User's Guide SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 21: List Of Materials
Updated the numbering format for tables, figures, and cross-references throughout the document....3 • Updated the user's guide title..........................SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022 TPS51220A Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 22 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 23 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 24 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 25 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 26 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 27 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...