LM 3886 explosion
I've managed to do a lot of bad things to a 3886 without having them blow up. I like all of the built in protections. When I designed the PRS amp, I figured that the common practice of using phone jacks to connect speakers was an accident just ready to happen. Consequently the output stage was designed to be driven fully into a dead short. It took 4 large Mosfets to do than because fold back current limiting was not an option. (Fold back current limiting presents a negative impedance and with an inductor that can spell oscillations - which it occasionally did)
I've managed to do a lot of bad things to a 3886 without having them blow up. I like all of the built in protections. When I designed the PRS amp, I figured that the common practice of using phone jacks to connect speakers was an accident just ready to happen. Consequently the output stage was designed to be driven fully into a dead short. It took 4 large Mosfets to do than because fold back current limiting was not an option. (Fold back current limiting presents a negative impedance and with an inductor that can spell oscillations - which it occasionally did)
Thank you all
Special thanks to you that informed me the price,
Related to protections all my friends where astonished too... it is a very good chip.
Bad luck maybe (not ironic, real possiblility)
Carlos
Special thanks to you that informed me the price,
Related to protections all my friends where astonished too... it is a very good chip.
Bad luck maybe (not ironic, real possiblility)
Carlos
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