General Configurations
8
SLVUBI9A – October 2018 – Revised March 2019
Copyright © 2018–2019, Texas Instruments Incorporated
TPS16630-32EVM: Evaluation Module for TPS1663x
3.4.4
Current Limit and Fault Responses Test
Follow the instructions to verify the current limit and various fault response modes like auto-retry and latch
off:
NOTE:
Measuring the current limit value on the oscilloscope can easily cause ±10% error from the
typical expected values as listed in
1. Set the current limit to 6 A by installing the J4/J10 jumper in position 1-2.
2. The jumper setting for different current limits is shown in
.
Table 10. TPS16630-32EVM Jumper Setting for Current Limits
CH1, CH2 Jumper Positions (J4, J10)
Load Current Limit (A)
1-2
6
3-4
4.5
5-6
2
7-8
1
9-10
0.6
3. Set the load resistance to 24-
Ω
±1
Ω
and the power supply voltage to 24 V.
4. Enable the load and the power supply .
5. Change the load resistance to 3-
Ω
±1
Ω
and verify that the IC limits the current to 6 A and latches off
after current limit
6. Change the load resistance to 24-
Ω
±1
Ω
and disable the power supply.
7. Set the current limit response mode to auto-retry by installing the J5/J11 jumper in the position 1-2.
8. Enable the power supply, change the load resistance to 24-
Ω
±1
Ω
and verify the current limit auto-
retry behavior.
9. Disable the power supply and the load.
