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| title | author | date | categories | tags | image | |||
|---|---|---|---|---|---|---|---|---|
| Inside a bus USB charger | peter | 2024-02-24 14:06:00 +0800 |
|
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/assets/img/2024-02-24-Inside-a-bus-USB-cha/preview.png |
Random post, on the bus I saw one of those wall-mounted USB chargers with the plastic cover already removed (I did not remove it). This is what the PCB inside of it looks like.
Looks like there are two DC-DC converters, pretty simple. The board also appears to be conformal coated.
EDIT:
Looks like this is just a COTS charging module. Searching "USB3.25", which is present on the sticker on the USB-A port, leads to this product page. The datasheet claims it is "equipped with a protection against overvoltages, polarity reversals and short-circuits(intentional vandalism).".
