Is a full-bridge, have this power, right?
Hi
no not full bridge
this design is half bridge
wörking very stable, low component cost
Hi DC Sound,
Do you have schematic of your irs900 look interesting to try to make my own one.
thanks
santosjoj
I don't have schem, I use the pcb lay-out of thien.chay....
Plz send smps diagramsMy amp
Sent from my SHV-E250L using Tapatalk
Yes, I know some people have seen smoke when turning on D900 without speaker.
Well, the modification actually cannot remove that risk of smoking at all, but make it more safe. The two diodes after inductor will act as bypass. When the output voltage increased because open loop, the diodes keep output voltage never more than supply voltage by discharge the voltage to supply rails.
The bad news is that even the voltage is as low as your supply, it still can damage your zobel cap as it is not designed for such high frequency. So it is really depend on cap quality. The good news, except that cap, your amp will be fine.
Well, the modification actually cannot remove that risk of smoking at all, but make it more safe. The two diodes after inductor will act as bypass. When the output voltage increased because open loop, the diodes keep output voltage never more than supply voltage by discharge the voltage to supply rails.
The bad news is that even the voltage is as low as your supply, it still can damage your zobel cap as it is not designed for such high frequency. So it is really depend on cap quality. The good news, except that cap, your amp will be fine.
What's kind of Cap that we can use for zobel ? And R zobel, it' must carbon ?
Yes, I know some people have seen smoke when turning on D900 without speaker.
Well, the modification actually cannot remove that risk of smoking at all, but make it more safe. The two diodes after inductor will act as bypass. When the output voltage increased because open loop, the diodes keep output voltage never more than supply voltage by discharge the voltage to supply rails.
The bad news is that even the voltage is as low as your supply, it still can damage your zobel cap as it is not designed for such high frequency. So it is really depend on cap quality. The good news, except that cap, your amp will be fine.
Guys,
Here I give you simple legend D900, but modded for better stabiliy.
It works and stable, robust already.
Layout credit to BieTronik
Regards,
kartino
Nice & great class D amp mod project....
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D900 Mod From Mr. Kartino
Result D900 mod by mr. Kartino
Thanx for nice D900 mod
(Pic from Class D group FB)
regards
Result D900 mod by mr. Kartino
Thanx for nice D900 mod
(Pic from Class D group FB)
regards
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nice work para, what is the operating voltage and output fets??
170-0-170 vdc
not fullbridge sir but halfbridge at 2ohms +/-85vlts .Full bridge, +/-85vlts at 2ohms irfb4227? Oh. My. God. You must be veeeerrrry lucky.
i wanted to use +/-120vlts half bridge at 4 ohms using irfb 4229, is it possible???
The schematic posted by you is full bridge.
In half bridge it's not perfectly impossible, but absolutely not safe. See recommendation in datasheet: 300-500 W. Maybe little more, but not 1500 W.
IRFB4227 is basically more efficient.
i wanted to use +/-120vlts half bridge at 4 ohms using irfb 4229, is it possible???
In half bridge it's not perfectly impossible, but absolutely not safe. See recommendation in datasheet: 300-500 W. Maybe little more, but not 1500 W.
IRFB4227 is basically more efficient.
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youre welcome!
This is better for more reasons.
or can i use fullbridge ucd at 4ohms +/-75volts with irfb4227
This is better for more reasons.
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