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5.6 TPS26612 Overload Protection Test

Use the following instructions to evaluate current limit behavior of TPS26612 (U3):

1. Set the jumper setting J10 in 1–2 position to set MODE = OPEN
2. Connect a load resistance of 1 kΩ between I_OUT_2 and AGND_2 at connector J9
3. Adjust potentiometer R12 to set 6V at I_IN_2 (J13/ TP16). This action results in a voltage of 15 V at the input 

of TPS26612 eFuse (U3)

4. Now apply load of 5 Ω between I_OUT_2 and AGND_2 to trigger overload fault
5. Observe the waveforms using an oscilloscope

Figure 5-10

 and 

Figure 5-11

 show current limit behavior of TPS26612 captured on the TPS2661EVM eFuse 

evaluation board.

Figure 5-10. Current-Limit Behavior of TPS26612

www.ti.com

Test Setup and Procedures

SLVUBX8B – OCTOBER 2020 – REVISED DECEMBER 2021

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TPS2661EVM: Evaluation Module for TPS2661x

Current-Loop Protector

15

Copyright © 2021 Texas Instruments Incorporated

Содержание TPS2661EVM

Страница 1: ...ce 10 Figure 5 6 Output Short Circuit Response of TPS26610 Device Zoomed 11 Figure 5 7 Input Undervoltage Protection Response of TPS26610 Device 12 Figure 5 8 Output Undervoltage Protection Response o...

Страница 2: ...ures include Bidirectional current input for CH1 range 20 mA Onboard selectable 3 burden resistors for CH1 50 100 250 Voltage Input on CH2 Onboard Power Amplifier OPA551 on CH2 for providing power for...

Страница 3: ...luation Board Options and Setting Part Number EVM Function Channel IN Range Overload Response Application TPS2661EVM Evaluation Board Current input protection on CH1 analog output protection and senso...

Страница 4: ..._2 49 9 R8 100 R9 249 R11 100k R12 VS2 VS2 VS2 VS2 VS2 VS2 VS2 J12 VS2 100nF C7 AGND_2 VS2 VS2 VS2 AGND_2 VS2 100nF C1 AGND_1 1 2 D4 24 3k R7 1 2 3 J2 282841 3 AGND_1 VS1 VS1 VS1 100nF C2 AGND_1 VS1 V...

Страница 5: ...tput for CH2 TP12 TP13 AGND_2 Reference ground for CH2 TP14 EN_2 Enable control for CH2 TP15 VS2 Negative supply for U3 TP16 I_IN_2 Signal input for CH2 Table 4 3 Jumper and LED Descriptions Jumper La...

Страница 6: ...ter 4 2 Test Equipment and Setup 4 2 1 Power Supplies One dual polarity regulated power supply 15 V 0 V 15 V 500 mA current limit One source meter of 200 mA 50 V rated 4 2 2 Meters One DMM minimum nee...

Страница 7: ...ng for TPS2661EVM eFuse Evaluation Board J4 J5 J6 J7 J10 J11 J12 J14 J15 J16 J17 J18 J19 J20 1 2 Open 1 2 Open 2 3 Open Open 2 3 2 3 Open Install Open Install Open Figure 5 1 TPS2661EVM Setup With Tes...

Страница 8: ...mA for approximately 50 ms and after that the current is limited to 30 mA for approximately 100 ms time and then auto retries for every 1 6 s 6 Step down the voltage at I_IN_1 to 1 6 V to remove the...

Страница 9: ...Figure 5 4 TPS26610 Response During Recovery From Overload Fault www ti com Test Setup and Procedures SLVUBX8B OCTOBER 2020 REVISED DECEMBER 2021 Submit Document Feedback TPS2661EVM Evaluation Module...

Страница 10: ...I_IN_1 5 Short the output of the device for example I_OUT_1 to AGND_1 with a shorter cable 6 Observe the waveforms using an oscilloscope Figure 5 5 and Figure 5 6 show test waveforms of output hot sho...

Страница 11: ...TPS26610 Device Zoomed www ti com Test Setup and Procedures SLVUBX8B OCTOBER 2020 REVISED DECEMBER 2021 Submit Document Feedback TPS2661EVM Evaluation Module for TPS2661x Current Loop Protector 11 Co...

Страница 12: ..._1 and gradually decrease the voltage to 15 4 V to trigger the input undervoltage fault 5 Observe the waveforms using an oscilloscope Figure 5 7 shows input undervoltage protection response of TPS2661...

Страница 13: ...adually decrease the voltage to 15 4 V to trigger the output undervoltage fault 4 Observe the waveforms using an oscilloscope Figure 5 8 shows output undervoltage protection response of TPS26610 on TP...

Страница 14: ...radually increase the voltage to 15 3 V to trigger the output overvoltage fault 4 Observe the waveforms using an oscilloscope Figure 5 9 shows output overvoltage protection response of TPS26610 on TPS...

Страница 15: ...of 15 V at the input of TPS26612 eFuse U3 4 Now apply load of 5 between I_OUT_2 and AGND_2 to trigger overload fault 5 Observe the waveforms using an oscilloscope Figure 5 10 and Figure 5 11 show curr...

Страница 16: ...pen jumper J6 4 Connect 600 at terminal J3 5 Set dual polarity regulated power supply to 20 V 0 V 20 V and apply the power at connector J2 6 Apply a voltage of 24 V at I_IN_1 7 The device limits the c...

Страница 17: ...havior of TPS26613 for VIN Vs www ti com Test Setup and Procedures SLVUBX8B OCTOBER 2020 REVISED DECEMBER 2021 Submit Document Feedback TPS2661EVM Evaluation Module for TPS2661x Current Loop Protector...

Страница 18: ...ng impedance to 42 as specified by IEC61000 4 5 to check the signal line transient immunity 5 Connect the surge pulse generator UCS500N at J1 and enable it 6 Observe the waveforms using an oscilloscop...

Страница 19: ...unity With TVS3301 at Input of CH1 www ti com Test Setup and Procedures SLVUBX8B OCTOBER 2020 REVISED DECEMBER 2021 Submit Document Feedback TPS2661EVM Evaluation Module for TPS2661x Current Loop Prot...

Страница 20: ...nce to 42 as specified by IEC61000 4 5 to check the signal line transient immunity 5 Connect the surge pulse generator UCS500N at J9 and enable it 6 Observe the waveforms using an oscilloscope Figure...

Страница 21: ...nity With TVS3301 at Output of CH2 www ti com Test Setup and Procedures SLVUBX8B OCTOBER 2020 REVISED DECEMBER 2021 Submit Document Feedback TPS2661EVM Evaluation Module for TPS2661x Current Loop Prot...

Страница 22: ...6 3 show PCB layout images Figure 6 1 TPS2661EVM Board Assembly Figure 6 2 TPS2661EVM Board Top Layer EVAL Board Assembly Drawings and Layout Guidelines www ti com 22 TPS2661EVM Evaluation Module for...

Страница 23: ...w ti com EVAL Board Assembly Drawings and Layout Guidelines SLVUBX8B OCTOBER 2020 REVISED DECEMBER 2021 Submit Document Feedback TPS2661EVM Evaluation Module for TPS2661x Current Loop Protector 23 Cop...

Страница 24: ...mphenol RF R1 R4 2 1 00 k RES 1 00 k 0 5 0 1 W 0603 0603 RT0603DRD071KL Yageo R2 R5 2 0 RES 0 5 0 1 W 0603 0603 RC0603JR 070RL Yageo R3 R6 2 180 k RES 180 k 0 1 0 125 W 0805 0805 RT0805BRD07180KL Yage...

Страница 25: ...otector with Input Output Miswiring Protection SOT23 8 TPS26610DDFR Texas Instruments U2 U5 2 33 V Bidirectional Flat Clamp Surge Protection Device DRB0008A VSON 8 DRB0008A TVS3301DRBR Texas Instrumen...

Страница 26: ...1EVM eFuse Evaluation Board Schematic 4 Updated Table 5 1 Default Jumper Settings 7 Replaced Figure 5 1 TPS2661EVM Setup With Test Equipment as per the revised EVM 7 Added surge test waveforms and Sur...

Страница 27: ...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...

Страница 28: ...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...

Страница 29: ...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...

Страница 30: ...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...

Страница 31: ...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...

Страница 32: ...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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