Onedust
Junior Member level 2
Greetings to all,
I have a question regarding using USB Power Adapter as a Power supply. I am using following module as a part of my HW design: **broken link removed**. It really lacks information in datasheets. The only thing it has on power supply requirements, is that it requires 5V+/-5% (https://www.fs-net.de/assets/download/docu/efus/efusA7UL_Hardware_eng.pdf, page 25). I guess this module has some kind of power regulator on it, but I have zero info on it.
I've contacted tech. support and they told me that the module doesn't have any particular start-up requirements (such as "supply voltage rise time". I am really conscious of UVLO, had pleasure debugging it once), apart from the start should be "more or less" continuous. Well it's all nice, but I would like to be sure that everything works fine, so my question is:
I know that my customer is going to use a USB power supply adapter, but I have no idea which one. It can be even some cheap Chinese one, the only info I have is that it will be capable of 2A. How would you suggest to filter USB input to be on the safe side? I've attached a pdf with a snippet from my power supply schematics(don't mind my notes). Would this filter be enough? How do you usually filter USB input? It should be more like a rule of thumb, since I have basically no info on the efus module and on the USB power supply, which is kind of annoying. So please don't start with "you have to give us more info", I don't have it myself
Any suggestions or links to info on the subject are very welcome.
Kind Regards,
Den
I have a question regarding using USB Power Adapter as a Power supply. I am using following module as a part of my HW design: **broken link removed**. It really lacks information in datasheets. The only thing it has on power supply requirements, is that it requires 5V+/-5% (https://www.fs-net.de/assets/download/docu/efus/efusA7UL_Hardware_eng.pdf, page 25). I guess this module has some kind of power regulator on it, but I have zero info on it.
I've contacted tech. support and they told me that the module doesn't have any particular start-up requirements (such as "supply voltage rise time". I am really conscious of UVLO, had pleasure debugging it once), apart from the start should be "more or less" continuous. Well it's all nice, but I would like to be sure that everything works fine, so my question is:
I know that my customer is going to use a USB power supply adapter, but I have no idea which one. It can be even some cheap Chinese one, the only info I have is that it will be capable of 2A. How would you suggest to filter USB input to be on the safe side? I've attached a pdf with a snippet from my power supply schematics(don't mind my notes). Would this filter be enough? How do you usually filter USB input? It should be more like a rule of thumb, since I have basically no info on the efus module and on the USB power supply, which is kind of annoying. So please don't start with "you have to give us more info", I don't have it myself
Any suggestions or links to info on the subject are very welcome.
Kind Regards,
Den