Victor 884 voltage regulators

[Richard Keast]

Does anyone know what type of voltage regulators are on the Victor 884?

[dtengineering]

If you are referring to the 9 things that LOOK like a 780x voltage regulator, they are actually a MOSFET, I believe... but I do not have the part number in front of me.

There are many different types of semiconductor devices that look similar to this, as the "package" is called a TO-220. So just as you have many different DIP IC's that look the same, you can also have many three-pinned parts that look the same.

I take it you are planning to re-build a blown victor?

Jason

[Mark McLeod]

The MOSFET Jason is referring to is a irl3103 (http://team358.org/files/electrical/VictorFET_irl3103.pdf)

[Ken Leedle]

I don't know about the Victor 884, but the Victor 883 uses the 5V version of the LM2931 (http://www.national.com/mpf/LM/LM2931.html) in an SOIC-8 package. They have a PIC16F627 doing the signal processing. The mosfets on the 883 are the IRL2203N (http://www.irf.com/product-info/datasheets/data/irl2203n.pdf). The high side gate voltage for the mosfets is generated by a simple boost regulator (http://forums.linear1.org/index.php/topic,604.0.html). Op amps are used to control the voltage going to the gates.

-Ken