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USB EZ-PD Type-C

Contributor

/* Enable/Disable Current Foldback in QC mode */

#define QC_CF_EN

Can you explain what is the function of this QC_CF_EN define ?

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Contributor

Hi, Lisa

Our product is 1C1A application and C port OCP trigger point is 3.6A .

if enabling QC_CF_EN  and A port entering QC2 mode , and A port voltage change from 5V to 9V or 12V, then C port OCP trigger point become 3A, why?

if disabling QC_CF_EN  and A port entering QC2 mode , and A port voltage change from 5V to 9V or 12V, then C port OCP trigger point still is 3.6A

BR

Ivan

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2 Replies
Moderator
Moderator

Hi Ivan,

This is for constant current support. The PD spec use current foldback. It is same feature.

Best Regards,

Lisa

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Contributor

Hi, Lisa

Our product is 1C1A application and C port OCP trigger point is 3.6A .

if enabling QC_CF_EN  and A port entering QC2 mode , and A port voltage change from 5V to 9V or 12V, then C port OCP trigger point become 3A, why?

if disabling QC_CF_EN  and A port entering QC2 mode , and A port voltage change from 5V to 9V or 12V, then C port OCP trigger point still is 3.6A

BR

Ivan

View solution in original post

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