EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: denimdragon on July 27, 2018, 10:30:03 pm
-
I'm repairing a Memphis Audio 16-PRX1000.1 and there are 4 blown N-Channel Mosfets but they seem to be odd-balls and I can't find them except on eBay. What I need to know is what datasheet specifications do I need to look at in order to use something comparable or better. I don't really want to get these from eBay as this is for a client and I can't risk it.
RU61150 Datasheet : https://cdn.datasheetspdf.com/pdf-down/R/U/6/RU65110R-Ruichips.pdf
I know the BVdss, Rds(on), are important, but what else should I look at when replacing a mosfet with another, and it is not a drop-in replacement?
Thanks!
-
after checking the rds and the bvdss, i would check the input and output capacitance's, in audio applications i would not bother too much
BUT i would check for similar one, with the integrated diode on drain and source pins, the rds would be my main concern
-
IRF3205
Replace all MOSFETs in the power supply, not just the blown ones.
Check all gate resistors.
Check gate drive waveform before installing new MOSFETs.
Use a current limited supply for initial powerup.
-
after checking the rds and the bvdss, i would check the input and output capacitance's, in audio applications i would not bother too much
BUT i would check for similar one, with the integrated diode on drain and source pins, the rds would be my main concern
:-+
IRF3205
Replace all MOSFETs in the power supply, not just the blown ones.
Check all gate resistors.
Check gate drive waveform before installing new MOSFETs.
Use a current limited supply for initial powerup.
That good news. I can source these locally. Thanks guys.