viper
Titanium
- Joined
- May 18, 2007
- Location
- nowhereville
Simple question. Just seems SCRs have much more ability and cheaper but I commonly just see the IGBT in VFDs. What am I missing? Has to be a reason for it.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I thought the slow turn off was actually a good thing and the switching actually "rolls" off to get a more sinusoidal wave form instead of square? Do I have that wrong?
I guess I could expand to get get a few questions answered on the IGBT???
2. In looking at the specs for IGBTs (really even mosfets too), there is usually a spec for continuous current but rarely peak or transient current to cover inrush. I know the IGBT is well known for tolerance in this area but how does one determine peak values over time without failure testing it?
3. Looking at the TO style IGBTs, the current rating is usually just scary high when compared to the package size and leads. Obviously heat sinking is paramount. How the heck does such a small (.040" wide) lead survive all that current? I remember replacing mosfets in the past that are high current and they seem to make it but man, it would sure seem they would need a more robust build and leads...
An IGBT is a bipolar transistor with an integral mosfet base driver, they have replaced the older darlington and triplington transistors. They are majority carrier devices like SCR's and they are driven into saturation like SCR's making both of them slow to turn off.
That would be "MINORITY CARRIER" device................
It's called a Reynolds Roast-in Bag
Notice
This website or its third-party tools process personal data (e.g. browsing data or IP addresses) and use cookies or other identifiers, which are necessary for its functioning and required to achieve the purposes illustrated in the cookie policy. To learn more, please refer to the cookie policy. In case of sale of your personal information, you may opt out by sending us an email via our Contact Us page. To find out more about the categories of personal information collected and the purposes for which such information will be used, please refer to our privacy policy. You accept the use of cookies or other identifiers by closing or dismissing this notice, by scrolling this page, by clicking a link or button or by continuing to browse otherwise.