Your specification seems to require an inverter rather than an AC switch. An inverter usually involves a DC bus.
Furthermore, the role of the 230 V output circuit is completely unclear.
You may want to post a detailed block diagram with some explanations.
If anybody familiar with 2SK3748 Mosfet. Actually I want to use these mosfet for High Voltage High frequency with HCPL 3120 single optocoupler as a driver. It means that each MOSFET, 1 optocoupler.I try to connect as H-Bridge but I cannot get the output voltage as needed(Bipolar square wave). Is it possible for HCPL 3120 and 2SK3748 use for this application. If any body know what is a suitable driver for 2SK3748 or other MOSFET can be used for high voltage high frequency.
Maybe I missed something, but for the ultrasonic case with H-bridge, with not use two HV half bridge drivers (or a HV full bridge driver). As your frequency is not very high (20kHz range), you may consider latest generation of IGBT when using over 300V DC bus voltage.
For "fsabras", When this is for an RF amplifier (radio amateur use or ISM), it will be difficult to find a driver.
Hi fsabras,
I think the 3.5 MHz is for that component a illusion...
Refer pls to datasheets Fig. 28...34: the basic junction temp rises from 25 Celsius/10KHz to ca 40C/100KHz,
than to min.80Cels...>>150Cels. depending of FETs & voltages by 1 MHz! :-(...
K.