[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: New IR Driver Chip

Original poster: Sparktron01@xxxxxxxxxxx
Hi Terry

I need to review the spec sheets and app notes on the '21531 part.
I believe there is a way to sync the oscillator to an external clock
(has to be larger the 1/6Vcc or the chip will shut down on the Rt/Ct input).
Then a CMOS buffer + clamp network for zero cross detection could
directly drive the chip as zero cross sync'd oscillator/buffer in one
shot.  That would be very cool to replace 3 IC's with one... and eliminate
a gate drive transformer or optocoupler to boot.

Dave Sharpe, TCBOR/HEAS
Chesterfield, VA. USA

 -------------- Original message ----------------------
From: "Tesla list" <tesla@xxxxxxxxxx>
> Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
> WOW!!
> That looks like a DRSSTC on a chip!!
> http://www.irf.com/product-info/datasheets/data/irs2453d.pdf
> The drive current is a little low but there "is" time to charge a
> bridge 5nF gate with the nice 1uS crossover delay!
> Weeeee!!!
> Cheers,
>          Terry
> At 05:25 PM 8/15/2006, you wrote:
> >This is a URL to a new full bridge 600V driver available from International
> >Rectifier.  The half bridge (original) IRS21531D has now been supplemented
> >with this NEW part (IRS24531D) which is a isolated full bridge, driven by
> >an RC "555 type" oscillator with undervoltage lockout, and latched and
> >active shutdown.  Looks very intriguing for DRSSTC, hard driven
> >SSTC, and perhaps DC to HVDC converters.  Can definitely drive FET's
> >and perhaps
> >small IGBT's for halogen / HID ballasts.
> >
> >http://www.powerpulse.net/news/story.php?storyID=15787&source=1
> >
> >Regards
> >
> >Dave Sharpe, TCBOR/HEAS
> >Chesterfield, VA. USA