Output driver card

[rrae]

Does anyone know what IC is U2? Its scraped off, i tried to add thermal paste to see marking, but i only can see last numbers 041, not sure about 0, but end of it is 41 for sure. U1 is TL081C, U3 is IR2010. Used in output stage, there are two of them, high/low side. Marking is DIG01. 01.

 

[KriszXJR]

Normally it's an inverter.
TC7WHU04FU or 74HC3G04 ???
Not sure! Follow the wiring.

 

[rrae]

its a inverter for sure?

 

[Perry Babin]

Compare to the circuit on PDF page 28 of the following file.
http://www.bcae1.com/temp/infinity - REF1600A.pdf

 

[rrae]

Another card. Used in big clas-d amplifier.
For fact, U6 is LM293.
Can someone confirm? Other ics are scraped off.
U5, U7 are IR21844
U3 TL072
U4 LM311

 

[Perry Babin]

Those are essentially right but the 311 could be a 211 (no real difference). The IR21844 is the DIP version. The IR21844S and the IRS21844S are the surface mount versions. This is only for clarification for others who will find this page.

 

[Mooly]

Pulse-R, your new thread is here:
Xenon 11.5k amplifier output card driver

 

[Pulse-R]

Thanks Mooly