Re: IGBT people... I need help please ...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Hi Marco, Scott

The UC3860 I tried to work in an induction heating phase controlled
120VAC full bridge application about 3-4 years ago, and your
assessment is right on, even with I and VFB tied to ground ("give me
everything you got Scotty!!!") I couldn't get the VCO or duty cycle
controls to ever work as well as a TL494 circuit I had built (had close
to 50 push-pull circuits work flawlessly, first crack from PCB shop).

A better option might be a SG3526 (or later) version PWM control
chip, especially if you are shooting for better then 150Khz operation.

Best Regards
Dave Sharpe, TCBOR
Chesterfield, VA USA

Tesla list wrote:

 > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
<Marco.Denicolai-at-tellabs-dot-com>
 >
 > Hi Scot,
 >
 > Just two things.
 >
 > 1. The IR2112/0/3, etc. has been and is a top selling IC for IGBT drive.
 > I recommend it.
 > 2. The UC3860 is a sucker! I think it's even obsolete: better so. It was
 > difficult to get it to work and weird to get anything from it. I haven't
 > yet had time to replace it, but I think next time for a H-bridge drive
 > I'll go discrete. This for a series of reasons I can list on demand (if
 > someone bothers to ask).
 >
 > Best Regards
 >
 >  > -----Original Message-----
 >  > From: tesla-at-pupman-dot-com [mailto:tesla-at-pupman-dot-com]
 >  > Sent: 20. marraskuuta 2002 02:15
 >  > To: tesla-at-pupman-dot-com
 >  > Subject: IGBT people... I need help please ...
 >  >
 >  >
 >  > Original poster: "BunnyKiller by way of Terry Fritz
 >  > <twftesla-at-qwest-dot-net>" <bigfoo39-at-telocity-dot-com>
 >  >
 >  > Hi all...
 >  >
 >  > Im still working on the IGBT power supply and have so far
 >  > reduced my known
 >  > resources of IGBT controllers/ drivers to zero....
 >  >
 >  > NTE  doesnt seem to have any cross references to the IR2112
 >  > or IR2110 chip
 >  > ( drivers)  the UC3860 controller chip cant be found either...
 >  >
 >  > does anyone here on the list know of a supplier that carries
 >  > these chips or
 >  > something comparable??
 >  >
 >  > I need a PWM chip that can be adjusted ( main Hz  30-50KHz )
 >  > and also able
 >  > to control the pulse width on time during the main pulse...
 >  >
 >  >
 >  > any help will be appreciated
 >  >
 >  >
 >  > Scot D
 >  >
 >  >
 >  >
 >  >
 >  >
 >  >