Hi all,
On our design with TPS65982 we used an other N-FET than on the buster pack.
We used FDMC7660 from On Semiconductor.
Datasheet: www.fairchildsemi.com/.../FDMC7660.pdf
The schematic is nearly the same as on the booster pack.
If we power up our board we have around 2V on VBUS of TPS65982.
Because of this voltage not every USB device get detected from corntroller.
If we disconnect External Power VBUS Voltage drops down to 0 (no Device attached).
To verify our design we swapped to the FET used on booster pack.
==> CSD17309Q3
With this FET`s everything is fine. But why?
Is there a problem with the max gate capacity?
Br Oliver