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OZ7DW > CPU 25.10.03 12:51l 23 Lines 725 Bytes #999 (0) @ WW
BID : 50707_OZ8BOX
Read: DB0FHN GUEST
Subj: Computer PSUs. Part 1.
Path: DB0FHN<DB0THA<DB0ERF<DB0FBB<DB0BI<DB0NOS<DB0EA<DB0RES<ON0AR<OZ5BBS<
OZ3DID<OZ8BOX
Sent: 031025/0948Z @:OZ8BOX.SIL.JYL.DNK.EU #:50707 [Silkeborg] FBB7.00g25
From: OZ7DW@OZ8BOX.SIL.JYL.DNK.EU
To : CPU@WW@
Tanks to KB2VXA Warren and others, to get our feets at the ground.
Philips published a book "Power Semiconductors Applications Handbook 1995"
Charpter 1 and 2 is the most important. Can bee downloaded at:
www.semiconductors.philips.com/acrobat/appchp1.pdf and appchp2.pdf.
At page 122 is shown the most common type used in computer PSUs,
Half Bridge or Singel ended Pushpull.
A "real" 250 watt running with a load of 25 Amp. it is 345 Watts with a temperature
at the cooling fin around 45 Centigrade, is posible.
Ther is many lowcost PSUs with big power numbers and small retifiers etc.
On Inet at "oz2cpu" is shown howtodoo.
Maybee a Part 2.
vy 73 jens oz7dw@oz8box.
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