Texas Instruments TPS2661EVM, User Manual, Page: 18 / 32

5.8 Surge Protection Test (Current Input, CH1)
Use the following instructions to perform surge test on the current input channel-1:
1. Set dual polarity regulated power supply to +15 V : 0 V : –15 V and apply the power at connector J2
2. Install jumper J6 in 5–6 position to connect 249 Ω as burden resistor
3. Set the source meter to 20 mA and connector to PSIL116 at J1
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 J1 and enable it
6. Observe the waveforms using an oscilloscope
Figure 5-13 and Figure 5-14 show surge performance for current inputs with TPS26610 on the TPS2661EVM
eFuse evaluation board.
Figure 5-13. IEC61000-4-5 (+1 kV, 42 Ω) Signal Line Surge Immunity With TVS3301 at Input of CH1
Test Setup and Procedures www.ti.com
18 TPS2661EVM: Evaluation Module for TPS2661x
Current-Loop Protector SLVUBX8B – OCTOBER 2020 – REVISED DECEMBER 2021
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