I have been trying to find components that would enable to transfer energy from two supercapacitors. From upper to lower and from lower to upper, bidirecional. As shown in the picture below.
Ideally a half bridge driver with incorporated Mosfets would be ideally. Maybe I didn't see but it seems Silicon Labs makes gate drivers without incorporated Mosfets.
I intend to use a PIC microcontroller to generate the PWM signal.
The half bridge and Mosfets will be supplied by the superapacitors. With 4 supercapacitors in series and with a linear voltage regulator a constant 5V can be achieved. This will be used to supply the half bridge and the mosfets supplies.
The approach seems to be with the Si827x or the Si8239x family.
Any inside help would be appreciated. #Which half drive, compatible mosfets, evaluation kit.
Silicon Labs does not have any products that have the FET's integrated. However, you are correct that either the Si827x or the Si8239x families would work for you. Also, the Si823x family would work as well. You just have to choose the FET's yourself.
You would choose FET's that can handle the voltage you are supplying to the bridge when they are turned off and handle the current you expect to deliver when the FET's are turned on. Whatever FET's you pick, our drivers can probably drive them.
Choosing the right family is based on other factors. For example, how much isolation do you need between the bridge and your MCU? The Si827x family is limited to 2.5kV surge. So, if you need more than that, you need one of the other families.
But if you expect really high speed common mode transient voltages, then the Si827x family has the best performance there.
The Si8239x family has special safety features that you may or may not need. For example, there is a status pin that can provide information on the UVLO condition of the isolated driver side. If that is of interest to you, then choose this family.
The Si823x family is our basic driver that is the most mature and simple to use.
You can find information on all our isolated gate drivers, including information on evaluation kits, here: https://www.silabs.com/products/isolation/isolated-gate-drivers
I hope this is helpful,