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whats the peak current draw on a hg 2879?

groundwire

Sr. Member
Jul 19, 2014
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what is the maximum current draw you can expect to see from an HG 2879 transistor? im hearing alot of people saying 20 amps per device is the max, some say 25 amps per device. thoughts?
 

I question whether HG publishes their own datasheet or copies Toshiba's Datasheet.
Both sheets attached below. You decide.

73
David

Well considering that HG Semiconductors has been in business since only 2010 and yet their 2879 data sheet is dated 1998 It would be pretty safe to guess that they just copied the Toshiba data sheet just as they copied the Toshiba device itself.
 
Well considering that HG Semiconductors has been in business since only 2010 and yet their 2879 data sheet is dated 1998 It would be pretty safe to guess that they just copied the Toshiba data sheet just as they copied the Toshiba device itself.
?
 
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exactly, thats what i was saying. hg hides their specs for whatever reason. hg says rated 18vdc max, try 15vdc with an hg and your on borrowed time. they wont survive very long. oh well lets call it 20a at 13.8vdc lol
 
exactly, thats what i was saying. hg hides their specs for whatever reason. hg says rated 18vdc max, try 15vdc with an hg and your on borrowed time. they wont survive very long. oh well lets call it 20a at 13.8vdc lol
I'm no amp builder, but lets do some math anyway (and if I'm wrong, perhaps someone here who actually builds amps can correct me).

Let's start with the suggested 100w (even though the IMD is rapidly increasing at that wattage according to the Toshiba datasheet). Assuming 65% efficiency for class C running at 12.5v, that comes out to 154watts, or 12.32A of current. If we multiply that 12.32A by the output impedance listed for that part (call it |Z| = 1.05) we get 12.936v dropping across the part. We are already making that transistor slam its head against the voltage rail... Are you sure you want to push 20A of current through that part at 13.8v????
 
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Company Profile​


Guangdong Huaguan Semiconductor Co., Ltd. was established in 2011. It is a national high-tech and Shenzhen high-tech enterprise specializing in R&D, packaging, testing and sales of semiconductor devices. The company has an internationally advanced semiconductor integrated circuit packaging and testing production line, and a technical team with rich experience in the design, packaging and testing of integrated circuits.

http://www.hgsemi.net/en/gywm/list-85.html

According to this page they were founded in 2011. Perhaps they lie on various pages, Who the F knows??? In any event a company founded in 2011 may very well quote meeting ISO-9001:2008 specs since that may have been the last updates in that field.
 
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