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Old 9th November 2006, 01:33 AM   #1
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Default Lm4702 Bpa

I have a 2.4 KVA transformer going to waste so I thought I would give the LM4702 a shot.
I would appreciate any feed back on the circuit, Thanks.Click the image to open in full size.
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Old 9th November 2006, 03:04 AM   #2
Bob0513 is offline Bob0513  United States
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You have wires shorting out R26,R27,R29,R30,R40,R41,R43, and R45
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Old 9th November 2006, 03:10 AM   #3
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Default shorts

Done for ease of placement , representative of pass threw of the base resistors, I will correct for clarification.
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Old 9th November 2006, 04:16 AM   #4
Bob0513 is offline Bob0513  United States
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Just making sure you were aware in case you planned on using the board layout in the same program. Your netlist would have been a little screwy.

Robert
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Old 9th November 2006, 04:21 AM   #5
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Default net list

Nope, just like useing it for quick work, its easy to work with, the board layout program stinks.
I use Ultiboard9 for PCB's.
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Old 9th November 2006, 02:23 PM   #6
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Nobody, nothing?? I thought someone my be a little interested.
A bridged LM4702 driven by a precision cross coupled line driver, all NPN drivers and outputs all Quasi, and the same gain and frequency charecteristics of a chip amp, and of course around 1KW power output??????? and the parts count is pretty easy to.
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Old 9th November 2006, 03:48 PM   #7
Nordic is offline Nordic  South Africa
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Al dem transitors are scaring us off, lol.

Build one yet? any pictures or is it just a schematic at this stage?
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Old 9th November 2006, 04:56 PM   #8
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Default LM4702

Just in the conception stage now, looking for some feedback and constructive critisism. I tried to stay true to the overture series in output topology gain and frequency, while pushing very high current and voltage levels.
I had been curious about this chip for a while and have a massive 2.4KVA torordial laying around and a bunch of MJ 18020 transistors, so what the heck, thought some people might be interested in a high quality very high power design.
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Old 9th November 2006, 05:03 PM   #9
Nordic is offline Nordic  South Africa
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Have you noticed the extra decoulping cap on LM4780 positive rail accoring to that reference circuit...?
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Old 9th November 2006, 05:13 PM   #10
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Could you explain in more detail, you mean 4702 not the 4780?
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