testing of SPS80 SMPS - Page 4

jackinnj · 14th November 2006, 01:52 PM

it's a little OT -- but we had someone turn on a device with SMPS in our little airplane (Piper Aztec) and it drove the auto-pilot off course.

ssanmor · 14th November 2006, 02:00 PM

Yes, these things sometimes have some funny effects

However, not all SMPS are made equal, and there a lot of things that affect their performance and EMI behaviour, so design has to be very careful

As you describe it, perhaps that auto-pilot problem was caused by a problem of startup inrush current producing a peak in the system, more than purely EMI/RFI ???

Anyway, talking about airplanes is a different issue, you only have to look at commercial aviation, where you can't even play with your GameBoy during takeoff or landing!

radio · 23rd August 2011, 07:31 AM

Hi
Ignore theory,... give SMPS project for 2x(35 ... 50)V/2x5A (PCB layuot and schematic)!
thanks and cheers !!

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14th November 2006, 01:52 PM	#31
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	it's a little OT -- but we had someone turn on a device with SMPS in our little airplane (Piper Aztec) and it drove the auto-pilot off course.

14th November 2006, 02:00 PM	#32
ssanmor diyAudio Member Join Date: Jan 2002 Location: Madrid	Yes, these things sometimes have some funny effects However, not all SMPS are made equal, and there a lot of things that affect their performance and EMI behaviour, so design has to be very careful As you describe it, perhaps that auto-pilot problem was caused by a problem of startup inrush current producing a peak in the system, more than purely EMI/RFI ??? Anyway, talking about airplanes is a different issue, you only have to look at commercial aviation, where you can't even play with your GameBoy during takeoff or landing!

23rd August 2011, 07:31 AM	#33
radio diyAudio Member Join Date: Oct 2009 Location: Bitola MACEDONIA	Hi Ignore theory,... give SMPS project for 2x(35 ... 50)V/2x5A (PCB layuot and schematic)! thanks and cheers !!