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470-ACFH barrel to usb-c adapter: can it charge a phone
Can a 470-ACFH 7.4mm barrel to USB-C charge low power devices such as a smartphone when plugged in directly? Just want to check it's not just passing through the high voltage from the barrel socket. Thanks.
nyc10036
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June 4th, 2019 14:00
You do realize that the 470-ACFH is placed at the end of the AC charger tip right?
And that the AC charger's tip will most likely be 19V DC. The actual voltage is explicitly stated on the AC adapter.
If your smartphone is able to accept 19V then you certainly can use it.
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jphughan
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June 4th, 2019 17:00
@ChrisReed212 best case it won't work at all. Worst case you will seriously damage whatever device other than a Dell laptop you're trying to charge. That adapter is meant to allow you to use "legacy" Dell AC adapters with the round barrel connector in order to charge Dell laptops via USB-C, since some Dell laptops no longer have the barrel connector anymore. The "legacy" Dell AC adapters wouldn't support USB Power Delivery, whereas USB-C laptops would require that in order to charge from a power source connected over USB-C, so presumably that adapter includes some sort of chip to handle that negotiation with the laptop on behalf of the adapter itself. However, it would very likely NOT have a voltage converter. Ideally that adapter would prevent any device other than a Dell laptop from pulling power from a Dell AC adapter, but I don't know if that's the case. But as was mentioned above, Dell AC adapters supply their power at a fixed 19.5 V. I don't know of any smartphone or even a tablet that supports that. Typically they use either 5V or 9V.