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LM5122EVM-2PH Evaluation Module

User's Guide

Literature Number: SNVU205

APRIL 2013

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Summary of Contents for LM5122EVM-2PH

Page 1: ...LM5122EVM 2PH Evaluation Module User s Guide Literature Number SNVU205 APRIL 2013 ...

Page 2: ...Setup and Procedure 5 5 1 Precaution Wire Gauge 5 5 2 Test Setup 6 5 3 Quick Test Procedure 6 6 Performance Curves 6 6 1 Efficiency 6 6 2 Load Transient 7 6 3 Interleaving 7 6 4 Light Load Operations 8 6 5 Startup 9 6 6 Loop Response 9 7 Schematic 10 8 Layout 12 9 Bill of Materials 15 2 Table of Contents SNVU205 APRIL 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated...

Page 3: ...Schematic Control Block 11 12 Top Silk Top View 12 13 Bottom Silk X Ray View 12 14 Top Copper Top View 13 15 Mid1 Copper X Ray View 13 16 Mid2 Copper X Ray View 14 17 Bottom Copper X Ray View 14 List of Tables 1 Electrical Performance Specifications 4 2 Pin Descriptions 4 3 Bill of Materials 15 3 SNVU205 APRIL 2013 List of Figures Submit Documentation Feedback Copyright 2013 Texas Instruments Inco...

Page 4: ...typical switching frequency Dual phase interleaved operation Table 1 Electrical Performance Specifications PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input Characteristics Input Voltage 9 12 20 V Input Current VSUPPLY 12 V ILOAD 7A 17 A Output Characteristics Output Voltage ILOAD 7A 27 02 28 28 98 V Output Current 7 A System Characteristics Switching Frequency 250 kHz Full Load Efficiency VSUPPLY...

Page 5: ...oltage is monitored by a voltage meter which should be capable of monitoring up to 32 V 4 4 Oscilloscope Oscilloscope and 10x probe with at least 20 MHz bandwidth are required 5 Test Setup and Procedure Figure 1 Connection Diagram 5 1 Precaution Wire Gauge Prolonged operation with low input voltage at full power will cause heating of the MOSFETs A fan with a minimum of 200LFM should be always prov...

Page 6: ...of the voltage meter to TP3 GND 5 2 3 Load Connect electronic load s positive terminal to TP1 VOUT and negative terminal to TP3 GND 5 3 Quick Test Procedure 5 3 1 Startup Set load current to 0 A and turn the load on Set power supply current limit to 25 A Turn on the power supply and increase voltage slowly up to 20 V Increase load current slowly up to 7 A 5 3 2 Shutdown Turn off the load Decrease ...

Page 7: ...A to 7 A and 7 A to 3 5 A load transient C1 VOUT Figure 3 Load Transient 6 3 Interleaving VSUPPLY 12 V C1 SW1 C2 SW2 Figure 4 Interleaving 7 SNVU205 APRIL 2013 LM5122EVM 2PH Evaluation Module Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 8: ... mode can be configured by controlling MODE pin voltage VSUPPLY 12 V ILOAD 0 A C1 SW1 Figure 5 Pulse Skip C1 SW1 Figure 6 Skip Cycle C1 SW1 Figure 7 Forced PWM 8 LM5122EVM 2PH Evaluation Module SNVU205 APRIL 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 9: ... GAIN VSUPPLY 12V ILOAD 7 0A PHASE www ti com Performance Curves 6 5 Startup VSUPPLY 12 V ILOAD 0 A C1 VOUT C2 SS C4 VSUPPLY Figure 8 Startup 6 6 Loop Response Figure 9 Loop Response 9 SNVU205 APRIL 2013 LM5122EVM 2PH Evaluation Module Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 10: ...Schematic www ti com 7 Schematic Figure 10 Schematic Power Block 10 LM5122EVM 2PH Evaluation Module SNVU205 APRIL 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 11: ...www ti com Schematic Figure 11 Schematic Control Block 11 SNVU205 APRIL 2013 LM5122EVM 2PH Evaluation Module Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 12: ...ost of components are on the top to allow the user to easily view probe and evaluate the LM5122 device Figure 12 Top Silk Top View Figure 13 Bottom Silk X Ray View 12 LM5122EVM 2PH Evaluation Module SNVU205 APRIL 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 13: ...ti com Layout Figure 14 Top Copper Top View Figure 15 Mid1 Copper X Ray View 13 SNVU205 APRIL 2013 LM5122EVM 2PH Evaluation Module Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 14: ...www ti com Figure 16 Mid2 Copper X Ray View Figure 17 Bottom Copper X Ray View 14 LM5122EVM 2PH Evaluation Module SNVU205 APRIL 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 15: ...11 R12 R15 R16 R26 R28 RES 0 Ω 5 0 1 W 0603 Panasonic ERJ 3GEY0R00V 10 R35 R36 R19 R33 RES 49 9k Ω 1 0 1 W 0603 Vishay CRCW060349K9FKEA 2 R20 R21 RES 3 3 Ω 5 0 1 W 0603 Vishay CRCW06033R30JNEA 2 R24 RES 8 06k Ω 1 0 1 W 0603 Vishay CRCW06038K06FKEA 1 R25 R27 RES 78 7k Ω 1 0 1 W 0603 Vishay CRCW060378K7FKEA 2 R29 RES 36 5k Ω 1 0 1 W 0603 Vishay CRCW060336K5FKEA 1 R31 RES 59 0k Ω 1 0 1 W 0603 Vishay ...

Page 16: ...Bill of Materials www ti com 16 LM5122EVM 2PH Evaluation Module SNVU205 APRIL 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 17: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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