Timeline for USB PD: can two outputs of the same power supply be used to generate positive and negative voltage?
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Dec 30, 2023 at 21:53 | comment | added | Justme | @LaurentGiroud Yes but USB PD is intended to be very simple and provide single voltage up to 20V and 3 to 5 amps. Your requirements are not simple and therefore require additional complexity. Have you ever seen a device that has the same requirement as you, meaning two isolated PD cables, for keeping the innards simple? Either PD is not a good solution for your problem if it requires weird use of it, or, you add power conversion and you can use any single supply DC power source for supply, including USB-C and maybe batteries. | |
| Dec 30, 2023 at 21:33 | comment | added | Laurent Giroud | The idea is to use as simple a mechanism as possible so using an additional DC to DC converter would bring additional complexity. The ideal solution would be for either USB PD to support negative voltages (yeah, not gonna happen) or to use two distinct power supplies. | |
| Dec 30, 2023 at 1:07 | history | answered | Justme | CC BY-SA 4.0 |