TUSB4041I: Enable SDP VBUS without an upstream connection

Hi Eugene:

  If the battery charging is enabled , downstream port should still support 500mA for SDP even upstream port is not connected.

Regards

Brian

Hi Brian

Thank you for your replying.

If TUSB4041I advertises DCP or CDP to peripheral devices, they may draw up to 1.5A.

However, my application has limited power thus I'd like TUSB4041I to advertise up to 500mA to peripheral devices.

Is it possible to limit advertised current capability of TUSB4041I?

Hi Eugene::

   Actually, when battery charging is enabled and upstream port is not connected, it only support DCP. TUSB4041 can not control the current limit , it all depends on DP/DM negotiation.

Regards

Brian

Hi Brian 

Thank you, I understand I should not enable battery charging on my application.

Is there any way to provide VBUS on Downstream port without battery charging feature when the upstream is unconnected?