A few weeks ago I was using a really good mosfet (IRF3708) with another circuit that I couldn't get to work properly until Phil Pilgrim pointed out to me that I did not have it grounded properly. The proper way to ground the Propeller-to-mosfet was to tie together the negative end of the mosfet-driven power side of things to the Vss of the Propeller. See attachment below. Then the circuit worked beautifully.
But now I'm wondering if I should do the same thing with the TPIC6595. Should the logic ground and power ground pins be connected together? And if so, is there something that should be done to prevent any kind of cross talk? I plan on running the PWM through this system at 100 Hz. Is that anything to worry about?
Comments
the datsheet http://focus.ti.com/lit/ds/symlink/tpic6595.pdf says that it is available in a 20-DIP-housing
and digi has them TPIC6595N
best regards
Stefan
Hi Stefan,
I saw that on Digikey but the following page suggests they don't have any in stock. search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=tpic6595
It looks like Allied might have some so I think I'll try that.
You guys are great. Much appreciated.
A few weeks ago I was using a really good mosfet (IRF3708) with another circuit that I couldn't get to work properly until Phil Pilgrim pointed out to me that I did not have it grounded properly. The proper way to ground the Propeller-to-mosfet was to tie together the negative end of the mosfet-driven power side of things to the Vss of the Propeller. See attachment below. Then the circuit worked beautifully.
But now I'm wondering if I should do the same thing with the TPIC6595. Should the logic ground and power ground pins be connected together? And if so, is there something that should be done to prevent any kind of cross talk? I plan on running the PWM through this system at 100 Hz. Is that anything to worry about?
thanks,
Mark