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Old 11th March 2012, 10:29 PM   #341
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YES,Nguyen i mean linear power supply
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Old 11th March 2012, 10:30 PM   #342
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How about a irs2092 based system with tc4420 buffers driving two pairs of IRFB4227 ?
This is what I use and it is very loud.
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Old 11th March 2012, 10:38 PM   #343
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Hi,Nigelwright7557 good day can you post your d design with buffer TC4420 just to compare with nguyen design,thank's
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Old 11th March 2012, 10:45 PM   #344
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Quote:
Originally Posted by don2007ksa View Post
YES,Nguyen i mean linear power supply
I have one design use IRS2092S+IRFI4020H-117P at here:

Power Amplifier and Power Supply Full PWM

If you use parallel two chanel and connect with 4 ohm load is it is 500W/4ohm

Or you replace one IRFI4020H become two IRFB4227,it maybe up to 1000W/4ohm.
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File Type: gif irfb4227.GIF (19.1 KB, 1346 views)
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Old 11th March 2012, 10:51 PM   #345
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Quote:
Originally Posted by don2007ksa View Post
Hi,Nigelwright7557 good day can you post your d design with buffer TC4420 just to compare with nguyen design,thank's
It is basically the irs2092 datasheet circuit with two tc4420 buffers added.
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Old 11th March 2012, 11:25 PM   #346
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Quote:
Originally Posted by nigelwright7557 View Post
It is basically the irs2092 datasheet circuit with two tc4420 buffers added.
Yes,at high frequency input impedance of mosfet is low,need use buffer stage to up current driver for mosfets output.

Buffer can use TC4420/4029 or two bjt/mosfet
-TC4429 have input impedance very large,it need current provide (current static) from power supply
-Two BJT/mosfet have input impedance smaller but it is classB => not need current provide from power supply (current startic very small)
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Last edited by hien.t.nguyen; 11th March 2012 at 11:32 PM.
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Old 12th March 2012, 12:12 AM   #347
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The 2092 can drive 1amp5, the 4420 can drive 6 amps.
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Old 12th March 2012, 06:01 AM   #348
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Thank's to both of you guy's.cheer's....
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Old 12th March 2012, 07:05 AM   #349
Dimonis is offline Dimonis  Russian Federation
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Quote:
Originally Posted by hien.t.nguyen View Post
Sorry,i mistyped ....

If I use 4 ohm load(full bridge),+/-100V,Pmax < 200x200/4 = 10KW(peak) = 7.07kW(rms)

.
Again mistype
200V (peak )~ 140V rms ,so 140x140/4 =5kW rms
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Old 2nd May 2012, 08:04 PM   #350
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Hi Ngthyen,
I'm interested in your bigam design, is there any news on the pcbs. If so, you will be able to upload them to the forum, you plan to sell them, or you be able to upload on my enail : aerasepolia2@gmail.com

Regrads,
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