It does exist for USB 2.0 (that is, BC1.2), available from several vendors, and works perfectly. To do that, the ideal solution would be a single IC that sits on the USB port and monitors D+/D-, CC1/2, and the rail voltages and sets a few GPIOs to tell your battery charge circuit what is and isn't allowed on this port. You also want the flashlight to charge as fast as possible from whatever power source you connect it to, because you know people will need to charge it quickly. For whatever reason, you'd like it to be rechargeable over a USB-C port. Speaking as someone in the industry who's worked on Type C-enabled gadgets, half the bloody problem is that the Type C products offered by the major semiconductor companies are _terrible_.įor sake of a simple example, consider designing a rechargeable flashlight.
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