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3 Schematic

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Figure 3-1. TPS54291EVM-431 Schematic

The schematic is for reference only. See

for specific values.

Schematic

4

TPS54291 Step-Down Converter Evaluation Module User's Guide

SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021

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Copyright © 2021 Texas Instruments Incorporated

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Summary of Contents for TPS54290

Page 1: ...re 4 2 Output Ripple Measurement Tip and Barrel Using TP3 and TP4 or TP18 and TP19 9 Figure 4 3 Control Loop Measurement Setup 9 Figure 5 1 TPS54291EVM 431 Efficiency vs Load Current 11 Figure 5 2 TPS...

Page 2: ...he EVM can be modified to other output voltages by changing some of the components 1 2 Applications Non isolated point of load and voltage bus converters Consumer electronics LCD TV Computer periphera...

Page 3: ...Min to Max 1 VOUT_ripple Output Voltage Ripple VIN Nom IOUT Max 50 mVpp IOUT1 Output Current 1 VIN Min to Max 0 2 5 A IOUT2 Output Current 2 VIN Min to Max 0 2 5 A IOCP1 Output Over Current Channel 1...

Page 4: ...atic is for reference only See Table 7 1 for specific values Schematic www ti com 4 TPS54291 Step Down Converter Evaluation Module User s Guide SLVU356A JANUARY 2010 REVISED OCTOBER 2021 Submit Docume...

Page 5: ...tion 3 3 7 TP15 GND Ground for VOUT2 Channel A Loop Monitoring Section 3 3 7 TP16 CHB VOUT2 Channel B for Loop Monitoring Section 3 3 7 TP17 GND Ground for VOUT2 Channel B Loop Monitoring Section 3 3...

Page 6: ...ed noise from the switch node 3 3 7 Channel 2 Loop Analysis TP14 TP15 TP16 and TP17 The TPS54291EVM 431 contains a 51 series resistor R13 in the feedback loop to allow for matched impedance signal inj...

Page 7: ...l Using a leaded ground connection can induce additional noise due to the large ground loop area 4 1 5 Recommended Wire Gauge VIN to J1 The connection between the source voltage VIN and J1 of HPA431 c...

Page 8: ...1 as shown in Figure 4 1 4 Connect voltmeter V1 to TP1 and TP2 as shown in Figure 4 1 5 Connect LOAD1 to J2 as shown in Figure 4 1 Set LOAD1 to constant current mode to sink 0 Adc before VIN is applie...

Page 9: ...5A V2 LOAD2 1 2V 2 5A V3 Figure 4 3 Control Loop Measurement Setup 4 3 Start Up Shutdown Procedure 1 Increase VIN from 0 Vdc to 12 Vdc 2 Vary LOAD1 from 0 Adc to 1 5 Adc 3 Vary LOAD2 from 0 Adc to 2...

Page 10: ...to TP6 as shown in Figure 4 3 4 Connect ground lead of Channel A and Channel B to TP5 and TP7 as shown in Figure 4 3 5 Inject 30 mV or less signal across R1 through an isolation transformer 6 Sweep fr...

Page 11: ...VIN 9 6 13 2V VOUT1 3 3V IOUT1 0 1 5A VOUT2 1 2V IOUT2 0 2 5A Figure 5 1 TPS54291EVM 431 Efficiency vs Load Current 5 2 Line and Load Regulation 1 188 1 194 1 2 1 206 1 212 V Output Voltage V O 3 25 3...

Page 12: ...P9 SW1 Ch4 TP12 SW2 Figure 5 3 TPS54291EVM 431 Output Voltage Ripple TPS54291EVM 431 Typical Performance Data and Characteristic Curves www ti com 12 TPS54291 Step Down Converter Evaluation Module Use...

Page 13: ...view probe and evaluate the TPS54291 control IC in a practical double sided application Moving components to both sides of the PCB or using additional internal layers can offer additional size reducti...

Page 14: ...54291EVM 431 Bottom Copper X Ray View from Top EVM Assembly Drawings and Layout www ti com 14 TPS54291 Step Down Converter Evaluation Module User s Guide SLVU356A JANUARY 2010 REVISED OCTOBER 2021 Sub...

Page 15: ...TPS54291EVM 431 Internal 2 X Ray View from Top www ti com EVM Assembly Drawings and Layout SLVU356A JANUARY 2010 REVISED OCTOBER 2021 Submit Document Feedback TPS54291 Step Down Converter Evaluation...

Page 16: ...istor Chip 1 16W 1 0603 Std Std 2 R2 R11 10 Resistor Chip 1 16W 5 0603 Std Std 2 R3 R12 20 5 k Resistor Chip 1 16W 1 0603 Std Std 1 R4 6 49 k Resistor Chip 1 16W 1 0603 Std Std 2 R5 R9 0 Resistor Chip...

Page 17: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Page 18: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Page 19: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Page 20: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Page 21: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 22: ...change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of thes...

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