Crap looking Cisco ATA192 power supply DSA-13PFCA-05 - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: April 08, 2022, 05:34:49 am
content: I got some used a Cisco SPA 122's and they come with this phihong 5v 2.0a power supplies with a metal pin.Then brought a brought the newer ATA192 models, apparently on the website it stated that it doesn't come with a power supply with a link to order it but it was out of stock back order. Anyway when it arrived one was in there and it was a 5v 2.4a. When I took it out it looked really cheap. It felt to me like a piece of crap and I was not happy with it but maybe that was my perception. There is something about it's appearances and weight that I don't trust and I tend to get suspicious but the previous one didn't really catch my attention like this one so I'd thought I'd compare them.I measured it and the others were a couple of grams heavier.Anyway I found a used PSAC12R-050 5v 2.4a variant on ebay and and brought it.https://www.ebay.co.uk/itm/294898670922Not bundled with any of the ATA 100's but the Cisco desk phones:https://www.phihong.co.uk/product/psc12r-050-10-12-watt-level-v-interchangeable-plug-series/QuoteJust noticed it is about the same price or little more with the clip new.It arrived yesterday and I compared them:On my portapow meter The DSA-13PFCA-05 AT 5.1 to 5.2v volts jumping up by 100mv on load whereas the other one was only in the 10's of mv.Cisco ata192 DSA-13PFCA-05 Crap looking psu:https://imgur.com/a/zRPxpJRWeighs 69g (without plug socket piece)Quotephihong PSAC12R-050 variant of Cisco SPA122 psu:https://imgur.com/a/QiBEmFSWeighs 80g (without plug socket piece)QuoteSo this type from this brand that they used in their older model seems to perform a lot better under load and regulation compared to this new noname brand and I wonder why they chose it instead?I did load test the SPA122's phihong 5v 2a and it does turn on at 5.01v, seems stable in the 10's mv's and that seems to hold up well at 4.7v at 2a and shut off at 2.10a but I wanted to compare like for like with specifications that's why I brought that one to give it a fair chance.11g difference but I know that is not always reliable to determine the quality by weight.I would really like to open these up (if I can find more of those phihong 2.4a selling) but if anything goes wrong with the ata192's then I would have to return the power supplies so can't open those.I found a review on a similar model:https://lygte-info.dk/review/USBpower%20Rasberry%20Pi%202.5A%20%28Stontronics%20DSA-13PFC-05%29%20UK.htmlBundled with Raspberry Pi's 5.1v 2.5a and looks identical (according to picture)QuoteThe one in the test looks okay to me but I am not satisfied with how the two I have are performing maybe they are different.The comparisons above confirm my suspicions that it is not only poorer looking but poorer performing and I don't trust it so I am going get another one of those PSAC12R-050.I am worried that this is not stable enough with the 100mv voltage spikes and the volt drop for long term use.What do you think, am I being paranoid?Do you think the DSA-13PFCA-05 bundled with the Cisco ATA192 has poor regulation?Oops I misspelt phihong thanks for Rustcollector for pointing it out.