topic Reduce transients in PF8100 in Power Management

Reduce transients in PF8100

Ellu24 — Wed, 08 Feb 2023 00:29:46 GMT

I am designing a hardware using LS1046 for space applications. I am using PF8100 and LTC7150 as in freeway board for the power supply.

1) Should I use and other devices (like TVS diode or zener diode) other than in freeway board to reduce the transients?

2) If I should use the above, where should I place the same?

Thanking you in advance.

Re: Reduce transients in PF8100

guoweisun — Wed, 08 Feb 2023 01:46:11 GMT

If add the robustness performance on EMC test, you can add the TVS on input terminations of regulators.

According the EMC level to select the corresponding components.

Re: Reduce transients in PF8100

Ellu24 — Wed, 08 Feb 2023 01:53:00 GMT

Thank you very much for your prompt response. Can you please suggest any TVS diode for this application. As per design, I will get 5v of input voltage from 6 pin picoblade connector and then I should down convert that to 3.3.V(using LT8642) and 1V (LTC7150) and 3.3 V as the input of PMIC(PF8100). Where can I add the TVS? Should I filter the 5V power from ATX power supply?

Thanking you in advance.

Re: Reduce transients in PF8100

guoweisun — Wed, 08 Feb 2023 03:14:16 GMT

Here I give example for this part green circle:

Re: Reduce transients in PF8100

Ellu24 — Wed, 08 Feb 2023 06:27:03 GMT

Thank you very much for the details.