Texas Instruments TPS2661EVM, User Manual, Page: 20 / 32

5.9 Surge Protection Test (Analog Output, CH2)
Use the following instructions to perform surge test on the analog output in channel-2:
1. Set dual polarity regulated power supply to +15 V : 0 V : –15 V and apply the power at connector J8
2. Connect load resistor of 2 kΩ at the output
3. Adjust the potentiometer R12 to set 10 V at the input of TPS26612
4. Use UCS500N to generate surge pulses. Set the test voltage to ±1 kV and coupling impedance to 42 Ω 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 5-15 and Figure 5-16 show surge performance for current inputs with TPS26610 on the TPS2661EVM
eFuse evaluation board.
Figure 5-15. IEC61000-4-5 (+1 kV, 42 Ω) Signal Line Surge Immunity With TVS3301 at Output of CH2
Test Setup and Procedures www.ti.com
20 TPS2661EVM: Evaluation Module for TPS2661x
Current-Loop Protector SLVUBX8B – OCTOBER 2020 – REVISED DECEMBER 2021
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