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Old 26th December 2007, 06:31 PM   #1
zox2003 is offline zox2003  United States
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Default 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???

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Old 26th December 2007, 07:08 PM   #2
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load impedance?
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Old 26th December 2007, 07:09 PM   #3
zox2003 is offline zox2003  United States
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4 ohms....
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Old 26th December 2007, 07:24 PM   #4
alfsch is offline alfsch  Germany
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depends on your supply...
if 40v at full power...200w out
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Old 26th December 2007, 09:04 PM   #5
Eva is offline Eva  Spain
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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.
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