Re: TLP250 OR BOOTSTRAP IC (IR2110 etc.) for MOSFET GATE DRI
My first question is stupid actually.
I don't think so. There are ways to use a TLP250 as highside driver, but it needs a floating supply or some
kind of bootstrap circuit similar to IR2110. Besides TLP250 maximum supply voltage you have to care also for
maximum MOSFET gate voltage.
As a first remark, your schematic has errors related to VB/VS and bootstrap diode connection. I think
they are obvious when you look at the circuit suggested in the datasheet.
FET gate drivers are ususally designed with symmetric drive current. It guess you are referring to a diode
that speeds up switch off? It may be used to assure sufficient deadtime, but it's most likely unwanted to
have too fast switch off. It mainly generates inductive overvoltages and causes EMC problems.
A bootstrap series resistor would act as a current limiter, but also reduce the maximum duty cycle.
The shunt resistor voltage drop would be hopefully small compared to IR2110 VCC, so you better connect IR2110
to common ground.