Motor controller Uc3625

[Beffo]

uc3625

I'm trying to construct a bldc motor controller using Texas UC3625 (same as 1625 and 2625). It has all the nice features I want so I tried to use the circuit in the datasheet.

But it does not work... the three high side MOSFET's seems to work but not the lower ones...

The MOSFET bridge DOES work as it's supposed to... made another controller first using TB9060FNG succesfully. Have just switched the controller IC and the components around it. Bridge and bridge driver remains...

Suggestions???

Added after 2 hours 46 minutes:

Datasheet:
https://www.alldatasheet.com/datasheet-pdf/pdf/29341/TI/UC3625.html

 

[Beffo]

uc3625 pdf

Use the Application exampel in data sheet and modify to your application... and it works fine.

Great controller that's easy to use