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USB EZ-PD™ Type-C Forum Discussions

chch_3621411
Level 4
Level 4
First like given

how does CCG3PA powerbank dual role USB-C understand if it should sink power or source power ? for exemple if i have plug the power bank to the macbook or a laptop how will it know it should charge the laptop or sink power from the laptop ?

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YiZ_31
Moderator
Moderator
Moderator
1000 replies posted 750 replies posted 500 replies posted

Hi,

Our default policy is that CC keeps toggle for Rp and Rd. Which means if you connect two CCG3PA power bank, it depends on the timing of connecting two power bank to decide which one is the power source. A good strategy for a power bank is to switch it default power role according to its remaining battery power, which can be done in the firmware.

For your second question, most of the laptop would provide 5V to power bank. Because the laptop would provide power to device connected to its USB port by default.


Regards,
Eddie

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YiZ_31
Moderator
Moderator
Moderator
1000 replies posted 750 replies posted 500 replies posted

Hi,

Our default policy is that CC keeps toggle for Rp and Rd. Which means if you connect two CCG3PA power bank, it depends on the timing of connecting two power bank to decide which one is the power source. A good strategy for a power bank is to switch it default power role according to its remaining battery power, which can be done in the firmware.

For your second question, most of the laptop would provide 5V to power bank. Because the laptop would provide power to device connected to its USB port by default.


Regards,
Eddie

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