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Old 21st July 2008, 01:52 PM   #1
Kay is offline Kay
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Default JBL D-AMP with IR2111

I find a service manual with a 1000W D-Amp, working with
the IR2111.

http://manuals.harman.com/JBL/HOM/Se...Array%20sm.pdf

1. Unfortunatly I can't read the PDF and I find only the pcb and
a symbol for the IR2111. I can't find the circuit.

2. Has anybody a spice model for the IR2111 or the older
IR2105?
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Old 21st July 2008, 02:18 PM   #2
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Old 21st July 2008, 02:29 PM   #3
Eva is offline Eva  Spain
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As the error message in Acrobat Reader explains, you have to download and install the Traditional Chinese package in order to read these schematics.

Now figure out where are those new JBL designs coming from JBL is almost dead.

Anyway, I will tell you that it's not worth the effort at all. You won't learn anything useful from these schematics, the whole design is pure junk, it looks a lot like amateur work.

IR2111 is not suitable at all for class D, it has 700ns dead time!! But then again, they use TL07x as comparators

High distortion and por reliability guaranteed! (by JBL)
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Old 21st July 2008, 03:38 PM   #4
luka is offline luka  Slovenia
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Hi

I put download and then cancel for those language and it works without it
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Old 21st July 2008, 03:59 PM   #5
Kay is offline Kay
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Thankjs for the answers, specially Eva.

I found a thread on DIYaudio with another circuit from JBL
and understand your opinion.

But I have a non-audio project with the 2111 and I had
to make some experiments.
I asked IRF for Spice and get this answer, maybe
interesting for other people:
For functional simulation may be you can use following
Spice models:
http://www.irf.com/product-info/models/sim/ir2101.zip
http://www.irf.com/product-info/models/sim/ir2102.zip
http://www.irf.com/product-info/models/sim/ir2103.zip
http://www.irf.com/product-info/models/sim/ir2104.zip
http://www.irf.com/product-info/models/sim/ir2106.zip
http://www.irf.com/product-info/models/sim/ir2110.zip
http://www.irf.com/product-info/models/sim/ir2112.zip

p.s.

>Traditional Chinese package
I try it with foxitreader, but it dont' work.

>cancel for those language
don't work with me
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Old 21st July 2008, 04:06 PM   #6
luka is offline luka  Slovenia
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Hi

I've done this with foxit reader and it does work
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Old 21st July 2008, 09:59 PM   #7
Kay is offline Kay
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I've solved the problem.
New downloading of the pdf and it works
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Old 22nd July 2008, 10:09 AM   #8
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Hum IR2111, they must have stole my circuit, i was the first using that crappy gate driver for class d, got huge crossover distortion.
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