oh i forgot it`s for Holton`s 400W symetrical amp http://www.aussieamplifiers.com/downloads/Updated AV400.pdf
It is true. It's because MOSFETs need a certain voltage between gate and source to turn fully on. If the driver stage has the same voltage rails as the output stage then the gates can only ever be taken up to rail voltage at most. This means that the sources (and thus the output) will only be able to reach Vgs less than the rails.
With higher rails for the driver stage then the gates can be taken above the output stage rails and thus the sources can reach very close to the (output stage) rails, effectively increasing efficiency.
Be careful not to drive the gate too much higher than the source though, since it will damage the MOSFET.
With higher rails for the driver stage then the gates can be taken above the output stage rails and thus the sources can reach very close to the (output stage) rails, effectively increasing efficiency.
Be careful not to drive the gate too much higher than the source though, since it will damage the MOSFET.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.