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USB superspeed peripherals Forum Discussions

MaOs_1615421
Level 2
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Hi

In the below reference schematic of the FX3 Type-C Superspeed Explorer Kit a positive overvoltage protection (OVP) controller is used (U11). According to the datasheet, it only supports a maximum current of 600mA (from Vin to Vout). Since both LDOs are hooked up to the output of the OVP, I would assume that the max current the entire board (including potential peripherals connected to the board) can sink is limited to 500mA. Is that correct?

Capture.PNG

In our own design, we require more than 500mA. I know that the CX3 needs to be shielded with an OVP. Would it be fine to use the OVP only for the CX3 VBUS input and power the LDOs and all the rest directly from VBUS?

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YiZ_31
Moderator
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Moderator
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Hi,

Yes, your understand is correct. The maximum current consumption of FX3 is about 260mA.

You can take more than 500mA current as long as your design meet the PD Spec.

You can also choose other OVP chip which can take more than 600mA, because it's better to monitor the OVP event of entire board not only CX3.


Regards,

Eddie

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

Hi,

Yes, your understand is correct. The maximum current consumption of FX3 is about 260mA.

You can take more than 500mA current as long as your design meet the PD Spec.

You can also choose other OVP chip which can take more than 600mA, because it's better to monitor the OVP event of entire board not only CX3.


Regards,

Eddie

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Thanks! Do you have a recommendation for another OVP with let's say up to 1-1.5A support?

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