IRF540Z-class D power

zox2003 · 26th December 2007, 06:31 PM

How much power should we expect from pair of IRF540Z (suffix Z) in class D ,pushed by IR2010 on +/- 45V?
Theoretically I should be able to get about 250W,practically???

Regards

oldmaelstrom2 · 26th December 2007, 07:08 PM

load impedance?

zox2003 · 26th December 2007, 07:09 PM

4 ohms....

alfsch · 26th December 2007, 07:24 PM

depends on your supply...
if 40v at full power...200w out

Eva · 26th December 2007, 09:04 PM

There is a layout-dependent amount of overshoot on Vds that limits the maximum practical supply voltage for reliable operation. Supply pumping may be also a concern.

If you take a close look at the Vds of the low side MOSFET while switching high currents, you may see the overshoot.

Cross-conduction, if any, is another limiting factor. The more precise the switching "sequencing", the more close you can get to the limits.

26th December 2007, 06:31 PM	#1
zox2003 diyAudio Member Join Date: Nov 2004 Location: usa	IRF540Z-class D power How much power should we expect from pair of IRF540Z (suffix Z) in class D ,pushed by IR2010 on +/- 45V? Theoretically I should be able to get about 250W,practically??? Regards

26th December 2007, 09:04 PM	#5
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	There is a layout-dependent amount of overshoot on Vds that limits the maximum practical supply voltage for reliable operation. Supply pumping may be also a concern. If you take a close look at the Vds of the low side MOSFET while switching high currents, you may see the overshoot. Cross-conduction, if any, is another limiting factor. The more precise the switching "sequencing", the more close you can get to the limits. __________________ I use to feel like the small child in The Emperor's New Clothes tale

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26th December 2007, 07:08 PM	#2
oldmaelstrom2 diyAudio Member Join Date: Nov 2005	load impedance?

26th December 2007, 07:09 PM	#3
zox2003 diyAudio Member Join Date: Nov 2004 Location: usa	4 ohms....

26th December 2007, 07:24 PM	#4
alfsch diyAudio Member Join Date: Jan 2002 Location: augsburg	depends on your supply... if 40v at full power...200w out

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