PROBLEMS WITH IRS2092?????? - Page 2 - diyAudio
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Old 13th September 2012, 08:59 PM   #11
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lol sorry slip of the keyboard, 1000 watts requires 63 volts minimum.
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Old 13th September 2012, 09:08 PM   #12
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lol sorry slip of the keyboard, 1000 watts requires 63 volts minimum.
thanks.....can u share any of your pcb of IRS2092 buffered????????
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Old 13th September 2012, 09:19 PM   #13
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thanks.....can u share any of your pcb of IRS2092 buffered????????
I basically used the 2092 datasheet circuit but added mosfet gate drivers.
The VCC capacitor is 100uf. The high side power supply has 47uf.
I also scaled down the voltages into the over current pins to stop resetting on high power. Decouple the mosfets very close to them. Decouple the 2092 very close to the IC.


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Old 13th September 2012, 09:41 PM   #14
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Originally Posted by nigelwright7557 View Post
I basically used the 2092 datasheet circuit but added mosfet gate drivers.
The VCC capacitor is 100uf. The high side power supply has 47uf.
I also scaled down the voltages into the over current pins to stop resetting on high power. Decouple the mosfets very close to them. Decouple the 2092 very close to the IC.


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thanks.....if i use 4 pairs of irfb4020 at 70volts can it be used @ 4OHMS load???? and what output power can it deliver?????????
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Old 13th September 2012, 09:47 PM   #15
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thanks.....if i use 4 pairs of irfb4020 at 70volts can it be used @ 4OHMS load???? and what output power can it deliver?????????
You will get at least 1000 watts into 4 ohms.
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Old 13th September 2012, 09:53 PM   #16
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You will get at least 1000 watts into 4 ohms.
nigel plz refer to IRFB4020 datasheet....it says it can deliver 300watts @ 8OHMS then if i use 4pairs then can i use it for 4ohms.....its dual package is IRFI4020 which is used in 2092's ref designs in which it says that 4ohms is not supported!!!!!!!!!!!
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Old 13th September 2012, 09:58 PM   #17
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nigel plz refer to IRFB4020 datasheet....it says it can deliver 300watts @ 8OHMS then if i use 4pairs then can i use it for 4ohms.....its dual package is IRFI4020 which is used in 2092's ref designs in which it says that 4ohms is not supported!!!!!!!!!!!
Only in single pairs.
They will be ok in multiples.
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Old 13th September 2012, 10:03 PM   #18
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Only in single pairs.
They will be ok in multiples.
THANKS ALOT,
these are cheap ones and i can get i very easily.....i likd the irs2092's OCP protection....does it work same as it does on low outputs if i drive it for 1000watts then if there is short on output will it bear it or just give me a haunting smoke out of it??????????/
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Old 13th September 2012, 10:10 PM   #19
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THANKS ALOT,
these are cheap ones and i can get i very easily.....i likd the irs2092's OCP protection....does it work same as it does on low outputs if i drive it for 1000watts then if there is short on output will it bear it or just give me a haunting smoke out of it??????????/
The OCP will work the same.
Its a matter of juggling the trip voltages so they dont trip during normal use but do if there is a short.
You can work out trip voltage by using the mosfets D-S on resistance times the max current draw.
I found it wasnt very reliable and just upped the trip voltage until it stopped resetting on full power.
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Old 13th September 2012, 10:14 PM   #20
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The OCP will work the same.
Its a matter of juggling the trip voltages so they dont trip during normal use but do if there is a short.
You can work out trip voltage by using the mosfets D-S on resistance times the max current draw.
I found it wasnt very reliable and just upped the trip voltage until it stopped resetting on full power.
ok thanks.....
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