Texas Instruments TPS40195 User Manual Download Page 6 | Manualshive

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Texas Instruments TPS40195 User Manual Download Page 6

5.1.7 Other

Fan:

This evaluation module includes components that can get hot to the touch, because this EVM is not

enclosed to allow probing of circuit nodes, a small fan capable of 200 LFM to 400 LFM is required to reduce
component surface temperatures to prevent user injury. The EVM should not be left unattended while powered.
The EVM should not be probed while the fan is not running.

Test Setup

6

TPS40195 Buck Controller Evaluation Module User's Guide

SLUU297B – DECEMBER 2007 – REVISED JANUARY 2022

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Copyright © 2022 Texas Instruments Incorporated

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Summary of Contents for TPS40195

Page 1: ...d TP9 10 6 5 Switch Node TP4 and SYNC TP12 10 6 6 Equipment Shutdown 10 7 TPS40195EVM Typical Performance Data and Characteristic Curves 11 7 1 Line and Load Regulation 11 7 2 Efficiency 11 7 3 Output...

Page 2: ...12 V bus to low voltage application while providing a number of test points to evaluate the performance of the TPS40195 in a given application 2 1 Applications Non isolated medium current point of lo...

Page 3: ...0 to 20 A 0 5 VOUTpp Output voltage ripple VIN 12 V IOUT 20 A 50 mVpp IOUT Output current VIN 8 V to 20 V 0 20 20 A IOCP Output overcurrent inception point VIN 12 V 20 5 TRANSIENT RESPONSE I Load step...

Page 4: ...chematic for Reference Only See Table 9 1 List of Materials for Specific Values Schematic www ti com 4 TPS40195 Buck Controller Evaluation Module User s Guide SLUU297B DECEMBER 2007 REVISED JANUARY 20...

Page 5: ...OAD1 should be an electronic constant current mode load capable of 0 ADC to 20 ADC at 3 3 V 5 1 4 Oscilloscope Oscilloscope A digital or analog oscilloscope can be used to measure the ripple voltage o...

Page 6: ...400 LFM is required to reduce component surface temperatures to prevent user injury The EVM should not be left unattended while powered The EVM should not be probed while the fan is not running Test...

Page 7: ...connected as shown in Figure 5 1 3 Connect the ammeter A1 0 A to 20 A range between VIN and J1 as shown in Figure 5 1 4 Connect voltmeter V1 to TP1 and TP2 as shown in Figure 5 1 5 Connect LOAD1 to J3...

Page 8: ...the oscilloscope probe tip through TP5 and hold the ground barrel to TP13 as shown in Figure 6 1 For a hands free approach the loop in TP13 can be cut and opened to cradle the probe barrel V2 can hav...

Page 9: ...ep frequency from 100 Hz to 1 MHz with 10 Hz or lower post filter 7 Control loop gain can be measured by 20 Log ChannelB ChannelA 8 Control loop phase is measured by the phase difference between Chann...

Page 10: ...Bandwidth AC coupling 1 s div horizontal resolution 5 V div vertical resolution 3 Increase VIN to 12 V 4 Set LOAD1 to 10 A 5 Vary LOAD1 and observe the oscilloscope 6 Vary VIN and observe the oscillos...

Page 11: ...33 3 31 OUTPUT VOLTAGE vs LOAD CURRENT 12 16 18 20 8 8V 12V 20V 3 28 3 32 Figure 7 1 TPS40195EVM Line and Load Regulation VIN 8 V to 20 V VOUT 3 3 V IOUT 0 A to 20 A 7 2 Efficiency 0 h Efficiency 60...

Page 12: ...UT 20 A to 4 A Ch1 IOUT Ch2 VOUT Figure 7 5 TPS40195EVM Transient Response VIN 12 V IOUT 4 A to 20 A Ch1 IOUT Ch2 VOUT TPS40195EVM Typical Performance Data and Characteristic Curves www ti com 12 TPS4...

Page 13: ...requency 60 45 30 15 0 15 30 45 60 100 1000 10000 100000 1000000 Frequency Hz Gain dB 0 45 90 135 180 Phase Gain Phase Figure 7 7 TPS40195EVM Bode Plot VIN 12 V IOUT 0 A Crossover Frequency 46 kHz Pha...

Page 14: ...TP1 VIN Ch2 TP5 VOUT Ch3 TP11 ENABLE Ch4 TP9 Power Good Figure 7 10 TPS40195EVM Switching Waveform Ch1 TP4 and Synchronization Ch2 TP12 VIN 12 V IOUT 10 A fSYNC 400 kHz TPS40195EVM Typical Performanc...

Page 15: ...mponents to both sides of the PCB or using additional internal layers can offer additional size reduction for space constrained systems Figure 8 1 TPS40195EVM Component Placement Viewed from Top Figur...

Page 16: ...ray Viewed from Top EVM Assembly Drawings and Layout www ti com 16 TPS40195 Buck Controller Evaluation Module User s Guide SLUU297B DECEMBER 2007 REVISED JANUARY 2022 Submit Document Feedback Copyrig...

Page 17: ...RF7832 3 R1 R10 R12 Resistor chip 100 k 1 16 W 1 Std Std 1 R11 Resistor chip 1 30 k 1 16 W 1 Std Std 1 R13 Resistor chip 3 01 k 1 16 W 1 Std Std 1 R14 Resistor chip 22 1 k 1 16 W 1 Std Std 1 R17 Resis...

Page 18: ...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 19: ...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 20: ...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 21: ...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 22: ...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 23: ...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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