T
treez
Guest
Hi,
A bidding contractor has claimed to have designed an offline 120W flyback transformer using a E42/21/15 Core with a 0.9mm gap (Using "Philips" 3C90 ferrite). He says he used a 12 pin , horizontal former by Norwe...
.....However, Norwe..
www.norwe.eu
...don't make a former of this description.
His PCB indeed shows a transformer footprint which indeed shows 12 pins, (6 each side). The pins are 5.08mm in pitch. The pin rows are 35.5mm apart. The "courtyard" of this transformer is 42.2mm by 42.2mm.
I cannot find a former of this size on the market. No TDK, Epcos or any other manufacturer shows a horizontal, 12 pin former with pin pitch of 5.08mm for E42/21/15 ferrite.
Do you know why he didnt use a standard Ferroxcube former for E42/21/15? (TDK , Norwe and Kaschke don't make formers for this ferrite)
{Due to this, We are wondering if he has made a mistake, and he actually used a different core set than his specified E42/21/15 core set}
A bidding contractor has claimed to have designed an offline 120W flyback transformer using a E42/21/15 Core with a 0.9mm gap (Using "Philips" 3C90 ferrite). He says he used a 12 pin , horizontal former by Norwe...
.....However, Norwe..
NORWE - coilformers | EFD-Series
www.norwe.eu
His PCB indeed shows a transformer footprint which indeed shows 12 pins, (6 each side). The pins are 5.08mm in pitch. The pin rows are 35.5mm apart. The "courtyard" of this transformer is 42.2mm by 42.2mm.
I cannot find a former of this size on the market. No TDK, Epcos or any other manufacturer shows a horizontal, 12 pin former with pin pitch of 5.08mm for E42/21/15 ferrite.
Do you know why he didnt use a standard Ferroxcube former for E42/21/15? (TDK , Norwe and Kaschke don't make formers for this ferrite)
{Due to this, We are wondering if he has made a mistake, and he actually used a different core set than his specified E42/21/15 core set}
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