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Replace IRF540 in IRFZ44
Replace IRF540 in IRFZ44
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Old 29th August 2011, 03:11 PM   #11
radio is offline radio  Macedonia
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Question Replacament for IRFZ44?!

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Originally Posted by Eva View Post
Oh, IRFxx prices vary a lot over time and depending on the quantity and procedence of the devices, but as an exmaple, when some chinese car amplifier manufacturer has 10.000 IRF540 in stock and there is no demand for MOSFET output stages it's allways cheaper to use them for SMPS than to buy another 10.000 IRFZ34 or IRFZ44 and eat the 10.000 IRF540 with potato chips
What is the replacement for IRFZ44?
thanks
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Old 29th October 2012, 01:49 PM   #12
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Interesting post Eva as always. It is interesting that you say that all car amps which have the IRF540 are worthless. Can you please explain why? Does the high Rds ON resistance affect the sound quality or is it just an efficiency issue. I recently built a car amplifier using a pushpull converter plus 2 x LM3875 for stereo operation. I used 4 x IRF540 (2 on each side) as the switching mosfets and the sound was not the same as running it from the toroidal. It was as if there was something missing. It lacked vitality. Lets see what you have to say about this.
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