looks like you can configure the IC with the OS pin (pin #3) on page 3, to take either all n-type or p-type for high-side and n-type for the lowside. Even though they say n-channel and p-channel on the first page, the application circuit has bipolars -- very confusing. I think maybe it is just a Japanese symbol issue .
Artem,
don't you think the usage of "n-channel" and "p-channel" is misleading on page 1 of the datasheet? When the word "channel" is mentioned, I would immediately think about a FET (field-effect transistor) of some kind.
If n-channel MOSFET were to be used I would expect the integrated circuit to have a charge pump inside to drive the n-channel MOSFETs on the high-side.
It is conventional to use mosfets , but igbt's as well . So if chip outputs, timing and load current are suitable for particular driver we can put whatever we can fit into requirements. For MOSFET there is Vgs does matter for bjt - Ib , so lets give a current via resistor and bjt will be happy to switch as long as motor current is less than mentioned above ?
I could not find a mistake from example aplication - except base resistor values where not mentioned - for bjt these are critical.
Am i wrong ?
Added after 3 minutes:
i dont assume that whatever is put into documenst is rule of must of course if one condition is met - design adaptation shold follow physical and logical sense. May be i dont have such .)
Yes, base resistors are very important for a BJT drive.
This IC would not be my first choice for a drive. I would suggest looking at the Infineon web site. I know that they have H-bridge and H-bridge drive for single phase stuff -- I have not used their three-phase stuff but I am sure it is there.
Thanks!
Probably the bjt in schematic is just a symbol issue.
And of course I could use the OS pin, just didn't se it.
I've had a hard time finding three-phase bridge drivers, but the infineon seems interesting...
v_c:
"This IC would not be my first choice for a drive"
why not?
My reason to use this ic is that it has an analog input, it can handle sensorless BLDC's, and I will use it in a hot or cold environment, like a truck.
I think it looks quiet simple, but it probably needs a lot of trial and error to determining the correct values for components and startup-cykle etc.
i suggest u to change the MOSFET to IGBT since the MOSFET is unstable and it will always accidentally to be conducting in unwanted condition and this will result in short circuit in H bridge.