Quote:
Originally Posted by Garbz
It looks good but it's not available from my usual sources for components either. .......
On the upside I have found a p-chan mosfet from NXP with low RdsON. Only problem is I'm at max ratings for gate switching voltage. That's the other issue going highside, it's relatively straight forward to control gate voltage with reference to ground but not so easy with reference to Vcc, not when using an off the shelf driver anyway. More research needed :-)
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Hi Chris...RS components has free shipping on parts....Element14 isn't that expensive to ship either and free over $45 order. Yes ordering from multiple sources is a pain and these intelligent fets are not cheap. Pity they are not logic level gates!
I control switched these fets using a BS170, small TO92 fet (it's gate ref to grnd) so easy to do and kept rev polarity protection. Your using Fet driver ICs...much better...keeps gate capacitance really low.
Sorry to throw a spanner into the works part selection and cct design trials can be quite expensive...this I do know!
What you have done is excellent and should be congratulated!
