Adafruit
USB Type C 3.1 PD to 5.5mm Barrel Jack Cable - 28V 5A Output
· MPN: ADA6273
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This cable will let you get rid of all those wall adapters you have stashed in the plastic bin in the basement. Instead of multiple wall warts with different...
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This cable will let you get rid of all those wall adapters you have stashed in the plastic bin in the basement. Instead of multiple wall warts with different power and current capabilities, this cable will convert any USB Type C power adapter with Power Delivery (PD) support into a 28V DC power port, at up to 5 Amps output!
Inside the cable is a PD sink negotiation chip. When plugged into a proper PD Type C adapter that can provide 28V it will chat with the PD source chip in the power supply and tell it "Hey please change your output to 28V thankyouverymuch!", and ta-da, you get 28V out on the DC barrel jack.
Do check the side of the adapter you are plugging into to make sure it is a 28V-capable PD source - the voltage and current capabilities will be listed on your adapter. We have a demo image up top for what it will look like if it can support the desired output.
Note it is not a boost or buck converter - if the power supply only can do 5V or 12V it will not magically convert it to 28V - we do have USB booster cables if that's what you want. Voltage output will often be 0.25V to 0.5V higher than the rated voltage so that at high current draw the voltage drop across the cable will still keep it at about the desired voltage at the tip.
This cable includes an EMARK chip, required by the USB C specification but sometimes left out. That means you can use this for high current (5A) charging / power delivery. These are also especially souped-up USB Power Delivery cables, meaning they're suitable for a swath of demanding devices, like laptops.
This cable is 1.8 meters long, so you get just the right amount of length for your project. Also comes with a velcro tie to keep it nicely coiled and neat. Tip is 5.5mm outer diameter, 2.5mm inner diameter with center positive voltage, but it's springy so it works just fine for 2.1mm as well.
Please note: If your USB PD power supply does not explicitly have 28V out, this cable will provide 20V or some other lower voltage.
Jargon buster
Plain-language definitions for the technical terms used above.
- center positive
- Center positive describes the polarity of a barrel-style DC power plug, where the centre pin is positive and the outer sleeve is negative. Using a power supply with the wrong polarity can stop the board from working or damage it.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
- USB Power Delivery
- USB Power Delivery is a standard that lets devices negotiate higher power levels over a USB-C connection. For this carrier board, PD 60W support matters because the Jetson module and connected peripherals may need more power than basic USB can provide.
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