0
\$\begingroup\$

I have received a lot of help from several members of this site. After trying to wire two charging ports on the same device and investigating the diode OR-ing configurations and the power mux configuration, members pointed out my mistake: the voltage drop of the diodes will not work. So, they recommended a parallel connection to me.

I am reassured that it is not an OTG port as many thought, but rather a charging-only connector (you can see the direct current symbol (DCIN) in the photo). However, I still have some concerns.

My question is, where do I make the CC connection in these modules? Another concern is that they recommended connecting both connectors (micro USB and USB-C) in parallel. Wouldn't that mean that I would have 5V in one of the receptacles without negotiation? Should I connect the two receptacles in parallel, or would this generate conflicts between the micro USB BC protocol and the pull-down resistors, even if it is only a charging port?

enter image description here

enter image description here

\$\endgroup\$
5
  • \$\begingroup\$ You've been already explained that to have your tablet charging in enhanced mode from Type-C port, you need to make a circuit to understand voltage levels on CC pins, and convert this information into charging signature that your tablet understands. This is the only way. \$\endgroup\$
    – Ale..chenski
    Commented May 31 at 3:47
  • \$\begingroup\$ Did you determine what kind of charger signature is required for your tablet to charge at elevated level? \$\endgroup\$
    – Ale..chenski
    Commented May 31 at 3:50
  • \$\begingroup\$ I believe most of your questions are repeats of your earlier questions that have been explained and answered already. I believe the answers have not changed since. You need to figure out if the 5th mystery pad is CC or not, we can't see that from the pictures. \$\endgroup\$
    – Justme
    Commented May 31 at 7:40
  • \$\begingroup\$ @Ale..chenski Yes! It appears to be a DCP BC 1.2 with the data lines shorted by a 200Ω resistor. I am open to any suggestions you might have. Thanks for responding. \$\endgroup\$
    – condor12
    Commented Jun 3 at 5:11
  • \$\begingroup\$ @Ale..chenski The question I have is that according to the information described on the laptop case it has an input voltage of 2.5 amp, I seem to remember that BC 1.2 accepts 1.5amp. Am I making an error or could it be an implementation? \$\endgroup\$
    – condor12
    Commented Jun 3 at 5:18

0

Reset to default