CYPD3171 CCG3PA 100watt 5A Sink Capability with Captive Cable (NO EMCA)

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RaRo_1233086
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Hi,

So we are working on a 5A 20Volt Sink device that will utilize a very short 5inch cable that has high current capability so no EMCA is needed but we would need to advertise (mimic)  the 5A Cable response on the CC lines in PSoC

Thanks

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RajathB_01
Moderator
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Hi,

It is technically possible to do this but requires a lot of re-work on the firmware. Hence the appropriate answer would be that this response is not supported by the current firmware.

Regards,

Rajath

View solution in original post

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6 Replies
RaRo_1233086
Level 3
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dpm_update_def_cable_cap()

can we use this or is this reserved for SRC only

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chch_3621411
Level 4
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hey the sorry for botthering you question caught my attetion, as you are 5A sink device i was wondering how do handle the heat ?
i mean how big is your PCB trace width ?
i tried online online calculator and it gives me really huge trace width that can't be possible to use in project as it is a small pcb

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https://www.cypress.com/documentation/reference-designs/ccg1-type-c-legacy-usb-device-cable-paddle-c...

Here is a good example of an EMCA cable design PCB that has up to 5A capability since there is 4 pins of 1.2A per C-connector its not hard to get the appropriate copper size/weight to accommodate 5A

my question pertains to SDK Code not hardware

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RajathB_01
Moderator
Moderator
Moderator
250 replies posted 100 replies posted 50 replies posted

Hi,

It is technically possible to do this but requires a lot of re-work on the firmware. Hence the appropriate answer would be that this response is not supported by the current firmware.

Regards,

Rajath

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Thank You, but if you could at least tell us what is missing in the code ... in a captive cable provider the 5A setting can be configured how can same be done with SINK since we have no cable and the C-connector is located right on the PCB that is making tha 5A request

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Hi Rad,

The code changes are significant - difficult to explain here. Even if we could, our restriction on exposing stack level confidential code will prevent you from understanding all the changes required. Thank you for your understanding.

Regards,

Rajath

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