selecting ETD core for half bridge SMPS

jegandren · 19th February 2008, 06:29 AM

Hi all,

I'm currently designing a half bridge switch mode power supply, but im not sure the type of ETD transformer that would suit my project,

here is the spec of my power supply that i suppose to design:

Topology : half bridge
Switching frequency : 100 Khz
Output power 300 W
Input primary voltage +/- 240*sqrt (2) / 2 V
secondary voltage +/-55 V

can anyone help me what is the power that i can get from ETD cores such as ETD 34 to ETD 44, which suits my spec.

Thank You

Ouroboros · 19th February 2008, 06:54 AM

You may find that

http://schmidt-walter.eit.h-da.de/sm...mps_e.html#Spw

is of help.

adi109cj · 19th February 2008, 09:14 AM

for 300W at 100khz an ETD34 core, 3C90 or N67 material is ok.ETD44 core is for 600-1000w output power.

Ouroboros · 19th February 2008, 10:08 AM

I must admit that I wouldn't try to push 300W through an ETD34, but I tend to be cautious. I would use a 44 myself in N87 or equivalent.

luka · 19th February 2008, 04:09 PM

Hi

At 100kHz etd29 should be enough, but to be safe go for etd34 or larger

19th February 2008, 06:29 AM	#1
jegandren diyAudio Member Join Date: Feb 2008	selecting ETD core for half bridge SMPS Hi all, I'm currently designing a half bridge switch mode power supply, but im not sure the type of ETD transformer that would suit my project, here is the spec of my power supply that i suppose to design: Topology : half bridge Switching frequency : 100 Khz Output power 300 W Input primary voltage +/- 240*sqrt (2) / 2 V secondary voltage +/-55 V can anyone help me what is the power that i can get from ETD cores such as ETD 34 to ETD 44, which suits my spec. Thank You

19th February 2008, 04:09 PM	#5
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	Hi At 100kHz etd29 should be enough, but to be safe go for etd34 or larger __________________ home page @ http://www.classdaudio.tk/ @ 24/7 all year long I FEEL SLOVENIA

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19th February 2008, 06:54 AM	#2
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	You may find that http://schmidt-walter.eit.h-da.de/sm...mps_e.html#Spw is of help.

19th February 2008, 09:14 AM	#3
adi109cj diyAudio Member Join Date: Mar 2006 Location: Cluj-Napoca Romania	for 300W at 100khz an ETD34 core, 3C90 or N67 material is ok.ETD44 core is for 600-1000w output power.

19th February 2008, 10:08 AM	#4
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	I must admit that I wouldn't try to push 300W through an ETD34, but I tend to be cautious. I would use a 44 myself in N87 or equivalent.