Timeline for Limiting cold-start current of an SMPS by an NTC
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Apr 27, 2023 at 4:45 | history | edited | Tim Williams | CC BY-SA 4.0 |
Expanded literature search
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| Jun 13, 2022 at 18:32 | comment | added | cm64 | I actually contacted the company and recently they replied and told me this cannot handle 45A inrush. | |
| Jun 1, 2022 at 17:37 | comment | added | Tim Williams | @cm64 Yes, every time; in contrast to, probably some 100s of A when hot, or even a few more if it had no limiting at all. | |
| Jun 1, 2022 at 15:37 | comment | added | cm64 | Yes but if SMPS is off for some time doesnt that mean 45A current peak will occur? So you mean 45A is eventhough there is limiter? | |
| Jun 1, 2022 at 10:50 | comment | added | Tim Williams | Also, it already has inrush limiting -- EN61000-4-11 is listed, and they likely use an NTC to do it (else, why note inrush from "COLD START"?). @cm64 that link isn't loading for me right now, but sounds like exactly the kind of reference needed! | |
| Jun 1, 2022 at 9:17 | comment | added | cm64 | So seems an NTC not necessary? | |
| Jun 1, 2022 at 9:16 | comment | added | cm64 | Interesting. This relay has AgSnIn contacts. And this document fa.omron.com.cn/upload/doc/qa/20080708084507281.pdf says: "Models with AgSnIn contacts are TV-5 class products" And it seems TV-5 relays are rated for 5A steady state current and 78A inrush. | |
| Jun 1, 2022 at 9:00 | history | answered | Tim Williams | CC BY-SA 4.0 |