Hey everyone
Just a last check (I promise ) now I've selected components (all except one). I was hoping you wouldn't mind just giving it a quick glance please. It's all ok on logic functions but a few things have me concerned, mainly regarding the H-bridge.
1) I have matched P (high side) and N-channel (low side) power MOSFETs as much as possible but they are in the TO-220A package rather than the TO-247 so I was just wondering if this package would be ok with an appropriate heat sink (with fan) at 12V 40A or is it just asking to blow up as the package is limited.
2) The flyback diodes, I'm having trouble finding anything with the forward voltage and current I need so does anyone have any suggestions there?
3) Anything you see that you think should be of concern please speak up
This won't be running at higher than 20kHz so the propagation delays, rise/fall times etc are all acceptable and I have a theoretical bottleneck of 250kHz with these drivers.
As usual thanks for any and all help and your time guys
================================================
Edit : Link to two previous topics, please click on below -- Scott Wang.
1. CMOS 7555 abstable output @ 800 KHz - trangular wave instead of square, slew rate problem?
2. MOSFET selection and setup for modified sine wave generator.
Just a last check (I promise ) now I've selected components (all except one). I was hoping you wouldn't mind just giving it a quick glance please. It's all ok on logic functions but a few things have me concerned, mainly regarding the H-bridge.
1) I have matched P (high side) and N-channel (low side) power MOSFETs as much as possible but they are in the TO-220A package rather than the TO-247 so I was just wondering if this package would be ok with an appropriate heat sink (with fan) at 12V 40A or is it just asking to blow up as the package is limited.
2) The flyback diodes, I'm having trouble finding anything with the forward voltage and current I need so does anyone have any suggestions there?
3) Anything you see that you think should be of concern please speak up
This won't be running at higher than 20kHz so the propagation delays, rise/fall times etc are all acceptable and I have a theoretical bottleneck of 250kHz with these drivers.
As usual thanks for any and all help and your time guys
================================================
Edit : Link to two previous topics, please click on below -- Scott Wang.
1. CMOS 7555 abstable output @ 800 KHz - trangular wave instead of square, slew rate problem?
2. MOSFET selection and setup for modified sine wave generator.
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