If I use TS12A12511 to switch the GaN bias, for example the input two bias voltages are :-3v and -6v;
Because TS12A12511 exhibits break-before-make switching action,during this switch period,the output voltage of TS12A12511 may be disconnected from -3v and -6v.But GaN bias needs negative voltage all the time.So is it a problem ?
User4087485,
Two power supplies switching the COM pin between -3V on NC and -6 V on NO is not an issue for the TS12A12511 if the device supplies are biased according to the recommended operating conditions in the datasheet.
I believe the break before make feature is necessary in this application to prevent a potential connection between the two power supplies.
I also wouldn't be too concerned with not being able to keep negative voltage on the COM pin during the very ~20ns break before make time. As you can see below the loading conditions play a significant role in how fast the COM bus voltage discharges when the connection breaks. You can manipulate the loading conditions on the COM bus for the desired operation
Thank you,
Adam
