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I want to supply power the system via USB-BC.
The configuration is as shown in the figure below.
If you have AC / DC, this is always the power source.
The tablet becomes UFP and receives power.
If there is no AC / DC, the tablet becomes DFP and supply power.
If AC / DC is connected when AC / DC is not connected, the tablet wants to do Power Role Swap immediately with AC / DC as the source.
In both cases, the tablet is always the Host.
Is this configuration possible with CCGx?
*USB-BC is used because the tablet does not support PD.
Thanks,
Tetsuo
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Hi Tetsuo-san,
Please confirm the following points-
-The AC/DC supply will provide charging as per BC 1.2 DCP mode of 1.5A. In that case how will 5V/3A be provided to the tablet? Did you mean Type-C charging and not BC 1.2?
-For changing the table role to UFP or DFP based on the connected supply, role swaps would be required which is possible only with USB PD.
-The CCGx device could be configured as a DRP (with Try.Src set) to have the appropriate configuration based on power supply but then it would be fixed to be either a DFP, source or a UFP, sink.
Best Regards,
Sananya
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Hi Tetsuo-san,
Please confirm the following points-
-The AC/DC supply will provide charging as per BC 1.2 DCP mode of 1.5A. In that case how will 5V/3A be provided to the tablet? Did you mean Type-C charging and not BC 1.2?
-For changing the table role to UFP or DFP based on the connected supply, role swaps would be required which is possible only with USB PD.
-The CCGx device could be configured as a DRP (with Try.Src set) to have the appropriate configuration based on power supply but then it would be fixed to be either a DFP, source or a UFP, sink.
Best Regards,
Sananya
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Sananya-san,
Thank you for your comments.
I will check power rale again.
Thanks,
Tetsuo
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Sananya-san,
I reconfirmed.
AC / DC supports USB-PD. Power is supplied from the AC / DC power supply to the adapter using the maximum type-C (USB-PD) standard.
The supply and demand of tablets is the USB-BC standard.
In this configuration, I want to switch between UFP / DFP with or without AC / DC power. It seems difficult to configure with USB-BC, but I think USB-PD is feasible. Is it correct?
If yes, I think that it change the tablet to PD standard.
Thanks,
Tetsuo
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Hi Tetsuo-san,
Yes, that is correct. The ports of the PD controller in the system can be set to DRP and based on the connected AC/DC power supply it could switch roles to source or sink. But the tablet would require to be the DFP always since it is a host as well as become a sink when the supply is connected, so port role swap would be needed which is possible only with USB-PD.
Best Regards,
Sananya
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Sananya-san,
Thank you very much.
I can understand very well.
Thanks,
Tetsuo