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18 lines
1.2 KiB
Markdown
18 lines
1.2 KiB
Markdown
---
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title: Inside a bus USB charger
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author: peter
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date: 2024-02-24 14:06:00 +0800
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categories: [Electronics] # Blogging | Electronics | Programming | Mechanical
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tags: [electronics, bus] # systems | embedded | rf | microwave | electronics | solidworks | automation
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image: /assets/img/2024-02-24-Inside-a-bus-USB-cha/preview.png
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---
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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.
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Looks like there are two DC-DC converters, pretty simple. The board also appears to be conformal coated.
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EDIT:
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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](https://www.vignal-group.com/en/30-double-charging-usb-socket-for-a-bus-or-a-coach-6957.html). The [datasheet](https://www.vignal-group.com/en/fiche-technique-30-double-charging-usb-socket-for-a-bus-or-a-coach-6957.pdf) claims it is "equipped with a protection against overvoltages, polarity reversals and short-circuits(intentional vandalism).".
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