FTDI Community
General Category => Discussion - Hardware => Topic started by: adrian on October 09, 2020, 10:38:39 AM
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Hello,
In the FT230X datasheet, there is an application description with switching the usb power with a MOSFET. I am wondering if this circuit actually works. I think it would just work if the CBUS3/PWREN# output switches between output low and hi-Z. But i couldn't find anywhere in the datasheet a description that this happens. If the output just switches to output high, the 3.3 V IO voltage wouldn't be enough to switch the MOSFET.
I am wondering how it works?
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Hello
Please see TN_162 Bus Powered with Power Switching Configuration (https://www.ftdichip.com/Support/Documents/TechnicalNotes/TN_162%20Bus%20Powered%20with%20Power%20Switching%20Configuration.pdf) which should help.
Best Regards,
FTDI Community
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Hello,
Okay, thanks. This document confirms my suspicion. The circuit "Bus Powered with Power Switching Configuration" in Figure 6.3 in the FT230X datasheet doesn't work.
Best Regards,
Adrian