Just wondering.... has anyone tested and scoped the Sure Electronics AA-AB32291V100? (IRS2092 2 x 250watt Class D Audio Amp)
I have a AA-AB32291V100 and a AA-AB32291V110. The 'V110 can hold a nice square wave at 100watts 8ohm resistor 19KHZ.
The AA-AB32291V100 can't get past 8KHz with out looking like this (same setup at 19KHZ Squarewave);
You can see the board AA-AB32291V100 on Parts Express website and it's missing four diodes D6A D5A D6B D5B. The AA-AB32291V110 has the four diodes. Thanks for any feedback.
I posted this to see if its just 'me' or that the Sure Electronic IRS2092 has different 'versions.' The AA-AB32291V100 board would maybe okay in a subwoofer application and the AA-AB32291V110 would be good in a full range app. I have not received any response from Sure Electronics.
I have a AA-AB32291V100 and a AA-AB32291V110. The 'V110 can hold a nice square wave at 100watts 8ohm resistor 19KHZ.
The AA-AB32291V100 can't get past 8KHz with out looking like this (same setup at 19KHZ Squarewave);
You can see the board AA-AB32291V100 on Parts Express website and it's missing four diodes D6A D5A D6B D5B. The AA-AB32291V110 has the four diodes. Thanks for any feedback.
I posted this to see if its just 'me' or that the Sure Electronic IRS2092 has different 'versions.' The AA-AB32291V100 board would maybe okay in a subwoofer application and the AA-AB32291V110 would be good in a full range app. I have not received any response from Sure Electronics.
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What does a low level square wave (1W or 10W) look like? A 100W square wave at 19kHz from a Class D amplifier is likely seriously stressing the output filter.
The output is rated for 250watts 20-35,000 Hz and I drove both versions of the IRS2092 to 100watts. Only one had a problem with a square wave. The sine wave 'looks' okay. So the design seems right (see IRF IRAUDAMP7D) its the component selection that I am suspect of. If I am right, then someone else would be able to run a signal generator to their AA-AB32291V100 and scope it.
Before demodulator: 20 Hz-35kHz ±3 dB 1W, 4Ω – 8Ω Load
Does an 250w audio amplifier need 100w into 19khz?
Regarding Sure board versions: I have seen the same thing with other Sure design, but then the original Sure schematic is close to EVM or reference design, the version you buy misses parts the pcb silkscreen and schematic have. Like missing parts in outputfilter, missing decoupling etc, compare 3110 and 7498 amps. But there original most complete version has lowest number, version sold a higher number. These irs2092 boards you mention seem the other way around.
Does an 250w audio amplifier need 100w into 19khz?
Regarding Sure board versions: I have seen the same thing with other Sure design, but then the original Sure schematic is close to EVM or reference design, the version you buy misses parts the pcb silkscreen and schematic have. Like missing parts in outputfilter, missing decoupling etc, compare 3110 and 7498 amps. But there original most complete version has lowest number, version sold a higher number. These irs2092 boards you mention seem the other way around.
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