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USB EZ-PD™ Type-C Forum Discussions

TeMa_2997106
Level 6
Level 6
10 likes received 10 solutions authored 250 replies posted

Can legacy chargers support multiple standards simultaneously?

In datasheet, the CCG3PA has 2 blocks of legacy chargers.

CCG3PA_Legacy_Charge.jpg

I want to support 3 standards in same FW.

- BC1.2

- AC 2.4A

- AFC

Thanks,

Tetsuo

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1 Solution
PranavaYN
Moderator
Moderator
Moderator
500 replies posted 250 solutions authored 50 likes received

Hi,

CCG3PA can support multiple legacy charging protocols simultaneously. Power SDK firmware requires some modification in order to support BC 1.2 and Apple charging simultaneously. You can refer to Legacy / proprietary charging configurations (Section 4.8 of CCGx Power SDK User Guide) for instructions.

Regards,

Pranava

Best regards,
Pranava

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7 Replies
PranavaYN
Moderator
Moderator
Moderator
500 replies posted 250 solutions authored 50 likes received

Hi,

CCG3PA can support multiple legacy charging protocols simultaneously. Power SDK firmware requires some modification in order to support BC 1.2 and Apple charging simultaneously. You can refer to Legacy / proprietary charging configurations (Section 4.8 of CCGx Power SDK User Guide) for instructions.

Regards,

Pranava

Best regards,
Pranava
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Pranava-san,

Thank you for your quick response.

I understood that BC1.2 and Apple Charging can be supported simultaneously.

How about AFC?

I want to support BC1.2, Apple Charging, and AFC simultaneously.

Does AFC need external resistance?

My understanding that external resistance is needed only for Apple Charging.

Is it correct?

Thanks,

Tetsuo

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Hi Tetsuo-san,

Yes, with the additional modification suggested all 3 protocols you mentioned can be supported simultaneously.

CCG3PA can support BC 1.2, Apple Charging, QC and AFC as a Source.

In Sink mode only Apple charging and BC 1.2 sinks are supported.

My understanding that external resistance is needed only for Apple Charging.

Is it correct?

>> Your understanding is correct regarding this.

Regards,

Pranava

Best regards,
Pranava
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Pranava-san,

Thank you for your support again.

CCG3PA is used as Power Adapter (source).

Therefore, I understand that the 3 protocols can be used simultaneously.

Thanks,

Tetsuo

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Sorry, I have another question.

Is there any way to confirm Legacy Charging?

Legacy Charging does not use CC pins, so CY4500 cannot check status.

Thanks,

Tetsuo

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Hi,

Legacy charging can be confirmed by analyzing Dp Dm and Vbus waveforms. From the firmware side you can always check for protocol that is active on the corresponding port.

We are not aware of any of-the-shelf analyzers as such.

Regards,

Pranava

Best regards,
Pranava
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Pranava-san,

Thank you for many supports.

I understand.

Thanks,

Tetsuo

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