Re: [TCML] the ir2110 mosfet driver chip for sstcs?

[Michael Twieg <mdt24@xxxxxxxx>]

The IR21xx chips are really popular for high voltage SMPS, but they take
some care when using.  I hear people having lots of trouble with them
burning often, and it's usually because they either exceed the output
current rating (2A isn't a lot) or they allow the output side to dip
negative during switching transients (this is usually due to poor layout).
I strongly recommend reading the following appnote by IR:
http://www.irf.com/technical-info/appnotes/an-978.pdf

I've never tried using them for a SSTC, but I imagine it would be pretty
tricky.  You'd have to balance the need for low gate lead inductance (to
protect against negative transients and preserve good rise time on the gate)
with the need for decent isolation between the delicate control electronics
and the H bridge.  Personally I would go for a truly isolated gate drive
scheme, using either galvanic or optical isolation.

-Mike

On Tue, Jun 7, 2011 at 6:33 AM, earl rhodes <earl_1975@xxxxxxxxxxxxx> wrote:

>
> hi guys
> ive come across a driver chip for sstcs the "ir2110"and the rest of that
> particular set of chips ir 2112 ir2113
> i have a few questions concerning thier use in sstc
> the chip sheet says they already have cycle by cycle shutdown protocols so
> im assuming i no longer need the flipflopclock circuit to control my shut
> down is this correct
> if this is correct i only need the one chip for it to work
> where my last board had a total of seven chips on it
> there was a 74hc14  a cd4013 a 74hco8 and four tc4420
> that was without having any ocd on  the board
> i could get away with only the one and they are cheap from hong kong at
> around 150 each
> your input would be totally apreciated
> i have had some succes with my other board having about 5inch disharge  but
> i do keep blowing driver chips for no apparent reason
> so ive rebuilt a board ready to take the ir 2110 it will be a couple of
> weks before i get them, im totally skint at the moment and then when i do
> get them bought it will take a further two weeks for them to arrive so in
> the meantime i just thought id ask someone else if  im correct about this
> chip
> heres a link to the data sheet
> http://www.irf.com/product-info/datasheets/data/ir2110.pdf
> if im totally off base its not unusual for me so let me have it
> thanks
> earl
>
>
>  _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla