When looking to increase the current limit on a Chinese controller it seems like a good idea to replace the unknown-quality FETS with some quality parts.
What, though, are the important characteristics to observe when picking a replacement fet?
Voltage, current handling and RDSon seem obvious, but I'm guessing that going to big could harm the electronics that drive the fets?
The datasheets have a bewildering array of specs - can anyone suggest anything along the lines of "make sure the XX rating is similar to the original"?
These are the fets I wish to replace: http://pdf1.alldatasheet.com/datasheet-pdf/view/23894/STMICROELECTRONICS/STB140NF75-1.html (or at least, they are marked "140NF75").
Thanks,
Ant
What, though, are the important characteristics to observe when picking a replacement fet?
Voltage, current handling and RDSon seem obvious, but I'm guessing that going to big could harm the electronics that drive the fets?
The datasheets have a bewildering array of specs - can anyone suggest anything along the lines of "make sure the XX rating is similar to the original"?
These are the fets I wish to replace: http://pdf1.alldatasheet.com/datasheet-pdf/view/23894/STMICROELECTRONICS/STB140NF75-1.html (or at least, they are marked "140NF75").
Thanks,
Ant