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Class D Switching Power Amplifiers and Power D/A conversion

ucd 25 watts to 1200 watts using 2 mosfets
ucd 25 watts to 1200 watts using 2 mosfets
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Old 2nd September 2012, 03:50 PM   #2481
exflaco is offline exflaco  Armenia
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Default LAY

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Originally Posted by ionutzxpo View Post
hi exflaco,post the LAY if you have it
Sorry y post complete material, no LAY ask other forum menbers may by somethig......
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Old 2nd September 2012, 03:52 PM   #2482
stewin is offline stewin  Kenya
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Originally Posted by CPX View Post
>>>which are the best pairs for output fet buffers among the below
2n5551/5401 , 2s/c2655/a1020 ,2s/a1013/c2229 , bc327/337 , bc368/369 , bc546/556 , bd139/140, mje 340/350

The ones with highest gain and current, but personally i would use dedicated drivers like tc4420
tc is difficult for me to find pls among the above which can work mean while. thanks in advance.

Last edited by stewin; 2nd September 2012 at 03:55 PM.
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Old 2nd September 2012, 03:53 PM   #2483
exflaco is offline exflaco  Armenia
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Stewin Bd139 and 140 work very well and to much cheap TC4420 Triell amps replace directly these new amps no more Tc only bds
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Old 2nd September 2012, 04:04 PM   #2484
nigelwright7557 is offline nigelwright7557  United Kingdom
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Quote:
Originally Posted by stewin View Post
tc is difficult for me to find pls among the above which can work mean while. thanks in advance.
I get my tc from rs, farnell or future.

I also use BD243/244 pairs for driving high gate capacitance mosfets.
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Old 2nd September 2012, 04:05 PM   #2485
stewin is offline stewin  Kenya
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thanks a lot exflaco i will use your schema but will parallel outputs like irf540n 4 pairs / irfp260n 5 pairs . i will post schema , pcb and pictures once i am through.
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Old 2nd September 2012, 04:07 PM   #2486
andrewlebon is offline andrewlebon  India
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hi
greetings which OCP is better triell ocp or detex irs2000 please can any one guide me
want to make pcb 3 pair fda90n20 with bjt totem please any feedback is welcome
supply is 80 volts dc+/- load 2 ohms
warm regards
andrew lebon
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Old 2nd September 2012, 04:09 PM   #2487
stewin is offline stewin  Kenya
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Originally Posted by nigelwright7557 View Post
I get my tc from rs, farnell or future.

I also use BD243/244 pairs for driving high gate capacitance mosfets.
thanks microsim
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Old 2nd September 2012, 05:36 PM   #2488
exflaco is offline exflaco  Armenia
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Default bridge

Stewin could move 2 pairs irfp250 gate resistor 100ohm directly from ir2110 +- 75- 90v
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Old 2nd September 2012, 05:47 PM   #2489
exflaco is offline exflaco  Armenia
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Andrew OCP Detex same the Crest class D amps ,Lm311 and 555 ,triell ,more simple a npn transistor and 555 two work fine ,a lot similar protecction on class d amps you only parallel 3 X1 ohms 5w resistor paraleel , and adjust the trimp to the desired humbrall protecttion,(sorry my poor english) more efficient + and - v sense ,another way old AB amps like Peavey the shunt sense resistor to gnd series to the speaker,y share schemm soon..
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Old 2nd September 2012, 07:02 PM   #2490
stewin is offline stewin  Kenya
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thanks exflaco for your help i have appreciated. thanks guys also
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