Author Topic: Using UCC37322 to drive cm300dy for Switching PSU  (Read 289 times)

Offline FonziDaytona

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Using UCC37322 to drive cm300dy for Switching PSU
« on: June 27, 2022, 05:30:22 PM »
Hi everyone,

I’ve been out of the game for many years, but remember the ucc37322 being the go-to for DRSSTCs…

Here’s what I’m trying to do:

I have a homemade ferrite transformer that I want to drive at 35-40khz. This will feed a full wave CW multiplier (6 stages). I have a cm300dy half bridge that I want to use for this. Would doubling up on ucc37322 (18A total) driven by a TL494 be enough to drive such a large IGBT at 40khz?

I see that everyone has gone t0-220 route. I’m assuming this is to drive these bricks very hard so that max pulsed currents can be used for drsstc use, no? In my case, there aren’t really high pulsed currents needed, as this is for a CW multiplier/ferrite transformer setup.

Thanks!
Matt

Offline davekni

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Re: Using UCC37322 to drive cm300dy for Switching PSU
« Reply #1 on: June 28, 2022, 05:05:27 AM »
Quote
Would doubling up on ucc37322 (18A total) driven by a TL494 be enough to drive such a large IGBT at 40khz?
Since I gather this is continuous operation (rather than pulsed as in DRSSTC), UCC37322 power dissipation might be limiting factor.  Might be a bit hard to predict how power will share between driver chips and gate resistors (external and internal to IGBT bricks), so I can't say anything for certain.
David Knierim

Offline AstRii

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Re: Using UCC37322 to drive cm300dy for Switching PSU
« Reply #2 on: June 28, 2022, 01:49:07 PM »
If you're going to drive such transistors in CW mode, always pick a driver which offers some easy to cool package like TO220. I recommend using IXD(N/I)6XX drivers. I have been using these in multiple projects and they are very robust. I have them tested up to 1.7MHz operation driving ~8nF Gate capacitances.
Marek Novotny
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Offline FonziDaytona

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Re: Using UCC37322 to drive cm300dy for Switching PSU
« Reply #3 on: June 28, 2022, 04:34:46 PM »
Thanks for the replies guys. I think I’ll switch over to the IXDD614CI. It can handle up to 14amps and comes in a t0-220 package that I can bolt to a heatsink.

Edit: Looks like the IXDD630CI can go to 30A for just a few bucks more.

-Matt
« Last Edit: June 28, 2022, 04:44:30 PM by FonziDaytona »

Offline AstRii

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Re: Using UCC37322 to drive cm300dy for Switching PSU
« Reply #4 on: June 28, 2022, 05:19:24 PM »
Yes I have been using both IXDN614 and IXDN630 drivers and never had any problems during switching. Let us know if you find any problems with those drivers.
Marek Novotny
Czech Republic, Czech Technical University in Prague
www.uhvlab.org

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Re: Using UCC37322 to drive cm300dy for Switching PSU
« Reply #4 on: June 28, 2022, 05:19:24 PM »

 


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