Texas Instruments TPS2661EVM, User Manual, Page: 8 / 32

5.1 Overload Protection Test
Use the following instructions to evaluate current limit behavior of the TPS26610 (U1):
1. Set the jumper setting J4 in 2–3 position to set MODE = 180 kΩ
2. Install jumper J6 in 1-2 position to connect 49.9 Ω as burden resistor
3. Set dual polarity regulated power supply to +15 V : 0 V : –15 V and apply the power at connector J2
4. Apply a voltage of 1.6 V at I_IN_1 and then step-up to 8 V to emulate overload situation on TPS26610
5. The device limits the current to 60 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 overload fault
Figure 5-2 and Figure 5-3 show current limit behavior captured on the TPS2661EVM eFuse Evaluation Board.
Figure 5-4 shows device response during recovery from overload fault.
Figure 5-2. Current Limit Behavior of TPS26610 for I
OUT
> 2 × I
OL
With MODE = 180 kΩ
Test Setup and Procedures www.ti.com
8 TPS2661EVM: Evaluation Module for TPS2661x
Current-Loop Protector SLVUBX8B – OCTOBER 2020 – REVISED DECEMBER 2021
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