Other Parts Discussed in Thread: UCC28782, TPS55288, TPS65987
Hello:
We will greatly appreciate if a correct circuit-based explanation is provided for the series switch shown in the referenced 2016 TI publication named "Evolution of USB C" by Enos and Gosselin.
Pl see attached pdf file where we point out that it is preferable to operate UCC28782 with a constant out voltage, say, 20.5 ( or some such value) and let TPS55288 be the interface being controlled by WT6636 throuhg I2C more effectively, thus offering highest overall efficiently of the connection as USB C PD.
In what part of any USB C PD Testing/compliance will such a series switch be indicated?
And won't the body diode of the switch negate all such "switch" operations?
TPS55288 inserted as shown will provide all compliance conditions.
The only issue will be added cost of the buck boost.
This is in exchange for clear failure modes of the series switch in almost all operations one can figure out from all possible Sink connections.
A clear circuit-based explanation will be highly appreciated.
evolution-of-USB_TI.pdfSERIES_PASS_SWITCH_USBC.pdf
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