Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsDev KitsPCB design board

User's Guide

SLVU432–February 2011

TPS53129EVM-621 Evaluation Module

The TPS53129EVM-621 Evaluation Module presents an easy-to-use reference design for a common

dual-output power supply using the TPS53129 controller in cost-sensitive applications.

Contents

1 Introduction .................................................................................................................. 2

2 Electrical Performance Specifications .................................................................................... 2

3 Schematics ................................................................................................................... 3

4 Connector and Test Point Descriptions .................................................................................. 4

5 Test Setup ................................................................................................................... 5

6 Test Procedure .............................................................................................................. 7

7 Performance Data and Typical Characteristic Curves ................................................................. 8

8 EVM Assembly Drawings and Layout .................................................................................. 12

9 Bill of Materials ............................................................................................................. 16

List of Figures

1 TPS53129EVM-621 Schematic ........................................................................................... 3

2 Tip and Barrel Measurement for Output Voltage Ripple............................................................... 5

3 TPS53129EVM-621 Recommended Test Setup ....................................................................... 7

4 Efficiency vs Load .......................................................................................................... 9

5 Efficiency vs Load .......................................................................................................... 9

6 Output Voltage vs Load .................................................................................................. 10

7 Output Voltage vs Load .................................................................................................. 10

8 Output Voltage Ripple .................................................................................................... 11

9 Output Voltage Ripple .................................................................................................... 11

10 Switching Waveform ...................................................................................................... 12

11 Switching Waveform ...................................................................................................... 12

12 Top Assembly.............................................................................................................. 13

13 Bottom Assembly .......................................................................................................... 13

14 Top Layer................................................................................................................... 14

15 Bottom Layer............................................................................................................... 14

16 Internal Layer 1 ............................................................................................................ 15

17 Internal Layer 2 ............................................................................................................ 15

List of Tables

1 TPS53129EVM-621 Electrical and Performance Specifications...................................................... 2

2 TPS53129EVM-621 Test Points Description............................................................................ 4

3 TPS53129EVM-621 Bill of Materials.................................................................................... 16

SLVU432–February 2011 TPS53129EVM-621 Evaluation Module

Submit Documentation Feedback

Summary of content (18 pages)

PAGE 1
User's Guide SLVU432 – February 2011 TPS53129EVM-621 Evaluation Module The TPS53129EVM-621 Evaluation Module presents an easy-to-use reference design for a common dual-output power supply using the TPS53129 controller in cost-sensitive applications. 1 2 3 4 5 6 7 8 9 Contents Introduction .................................................................................................................. 2 Electrical Performance Specifications ...............................................................
PAGE 2
Introduction www.ti.com 1 Introduction 1.1 Description The TPS53129EVM-621 evaluation board provides the user with a convenient way to evaluate the TPS53129 Dual D-CAP2™ Mode Control Step-Down Controller in a realistic cost-sensitive application. Providing both a low core-type 1.05-V and I/O type 1.
PAGE 3
Schematics www.ti.com Schematics + + + 3 NOTE: For Reference Only, See Table 3 for Specific Values. Figure 1.
PAGE 4
Connector and Test Point Descriptions www.ti.com 4 Connector and Test Point Descriptions 4.1 Enable Switches – SW1 and SW2 TPS53129EVM-621 includes independent enable switches for each of the two outputs. When the switch is in the DIS position, the channel is disabled and discharged per the TPS53129’s internal discharge characteristics. To enable VOUT1, place SW1 in the EN position. To enable VOUT2, place SW2 in the EN position. 4.
PAGE 5
Test Setup www.ti.com Metal Ground Barrel Probe Tip TP8 TP4 Figure 2. Tip and Barrel Measurement for Output Voltage Ripple 4.3.3 Channel-2 Output Voltage Monitoring – TP6 and TP7 TPS53129EVM-621 provides two test points for measuring the voltage generated at the VOUT2 output by the module. This allows the user to measure the actual output voltage without losses from output cables and connectors. Measure all dc output voltage between TP7 and TP6.
PAGE 6
Test Setup 5.1.3 www.ti.com Loads LOAD1: One output load is an electronic load set for constant-current mode capable of 0 Adc to 4 Adc at 1.05 Vdc. LOAD2: The other output load is an electronic load set for constant-current mode capable of 0 Adc to 4 Adc at 1.8 Vdc. 5.1.4 Oscilloscope and Probe The oscilloscope, analog or digital, must be set for ac-coupled measurement with 20-MHz bandwidth limiting.
PAGE 7
Test Procedure www.ti.com FAN + V1 - + - + + A1 - + LOAD1 1.05V @ 4A V2 LOAD2 1.8V @ 4A V3 - + VVIN Figure 3. TPS53129EVM-621 Recommended Test Setup 6 Test Procedure 6.1 Start-Up Procedure 1. Prior to connecting the dc input source VIN, it is advisable to limit the source current from VIN to 2 Adc maximum. Ensure that VIN is initially set to 0 V. 2. Ensure that LOAD1 and LOAD2 are set to constant-current mode to sink 0 A before VIN is applied. 3.
PAGE 8
Performance Data and Typical Characteristic Curves www.ti.com 5. Increase VIN from 0 Vdc to 12 Vdc. 6.2 Line/Load Regulation and Efficiency Measurement Procedure 1. 2. 3. 4. 5. 6. 6.3 Set up the TPS53129EVM-621 per Section 5.2. Start up the TPS53129EVM-621 per Section 6.1. Adjust VIN to desired value between 8 Vdc and 22 Vdc. Adjust LOAD1/LOAD2 to desired load between 0 Adc and 4 Adc. Read input voltage, output voltage, and input current from V1, V2/V3, and A1, respectively.
PAGE 9
Performance Data and Typical Characteristic Curves www.ti.com 7.1 Efficiency 90 VI = 8 V 85 h - Efficiency - % 80 VI = 12 V 75 VI = 22 V 70 65 60 VI = 8 V-22 V, VOUT1 = 1.05 V, IOUT1 = 0 A-4 A 55 50 0 1 2 3 ILOAD - Load Current - A 4 5 Figure 4. Efficiency vs Load 95 VI = 8 V 90 h - Efficiency - % 85 VI = 12 V 80 VI = 22 V 75 70 65 60 VI = 8 V-22 V, VOUT2 = 1.8 V, IOUT1 = 0 A-4 A 55 50 0 1 2 3 ILOAD - Load Current - A 4 5 Figure 5.
PAGE 10
Performance Data and Typical Characteristic Curves 7.2 www.ti.com Line and Load Regulation 1.06 1.058 VO - Output Voltage - V VI = 8 V-22 V, VOUT1 = 1.05 V, IOUT1 = 0 A-4 A VI = 22 V 1.056 1.054 VI = 12 V 1.052 1.05 VI = 8 V 1.048 1.046 1.044 0 1 2 3 ILOAD - Load Current - A 4 5 Figure 6. Output Voltage vs Load 1.83 VI = 22 V VO - Output Voltage - V 1.825 VI = 8 V-22 V, VOUT2 = 1.8 V, IOUT2 = 0 A-4 A 1.82 1.815 VI = 12 V 1.81 VI = 8 V 1.805 1.8 1.795 0 0.5 1 1.5 2 2.
PAGE 11
Performance Data and Typical Characteristic Curves www.ti.com 7.3 Output Voltage Ripple TPS53129EVM-621 Test condition: Vin 12 V, Vo1 1.05 V, 4 A Output Ripple Figure 8. Output Voltage Ripple TPS53129EVM-621 Test condition: Vin 12 V, Vo2 1.8 V, 4 A Output Ripple Figure 9.
PAGE 12
EVM Assembly Drawings and Layout 7.4 www.ti.com Switch Node Waveforms TPS53129EVM-621 Test condition: Vin 12 V, Vo1 1.05 V, 4 A Switch Node Figure 10. Switching Waveform TPS53129EVM-621 Test condition: Vin 12 V, Vo2 1.8 V, 4 A Switch Node Figure 11. Switching Waveform 8 EVM Assembly Drawings and Layout The following figures (Figure 12 through Figure 17) show the design of the TPS53129EVM-621 printed-circuit board (PCB).
PAGE 13
EVM Assembly Drawings and Layout www.ti.com Figure 12. Top Assembly Figure 13.
PAGE 14
EVM Assembly Drawings and Layout www.ti.com Figure 14. Top Layer Figure 15.
PAGE 15
EVM Assembly Drawings and Layout www.ti.com Figure 16. Internal Layer 1 Figure 17.
PAGE 16
Bill of Materials 9 www.ti.com Bill of Materials Table 3 contains the bill of materials for the TPS53129EVM-621. The reference designators refer to the schematic in Figure 1 and assembly locations in Figure 12 and Figure 13. Components with a quantity of 0 listed are not populated on the PCB but are provided for reference. Table 3. TPS53129EVM-621 Bill of Materials Qty 16 Description Size Part Number MFR 0 RefDes C1 Value Capacitor, Aluminum, 25V, 20% 0.328 x 0.
PAGE 17
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 18
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.