Energy #03 09 апреля 1997

Железо

Metallurgy - Power supply for byte.

               METALLURGY



                                (C) Fourth


    So, as I promised, you see my
next article devoted to the refinements
Bytes.

    Today I will talk about the power supply unit
(Hereafter BP) bytes, and that it can be
change for a more comfortable life.

    Generally it is a good blochok:
pulls a computer, controller and drive in
bargain. Some even hang two drives (Teac'i, Robotron'y) and 
that they everything works. This brings me to the next

subject.

    Brief Overview:
 - The byte to the controller on the drive +12 V

   consumes approximately 80 mA
 - The drive for Robotron +12 consumes

   approximately 200 mA, short-term to 350

   mA
 - Drive MS5311 approximately 370 mA, short
   kovremenno up to 420 mA
 - The drive for MS5305 +12 V max 0.8 A

   (As in passport)
 - Diodes KD103A maximum forward current

   100 mA
 - Diodes KD213A maximum forward current

   3 A (with heat sink 10 A)


    Once they brought me a faulty
Baytovsky PSU. I have it repaired, but at the same time
looked at his scheme. Then he thought for a moment
and remade his BS. Now I have one Baytovskom PSU without any 
problems can hang two drives (and maybe more). When I

climbed into the PSU and see what there are diodes
a bridge on +12 (KD103A), I was a little pribaldel, but when I 
looked at their performance in the handbook, the general ... 

    As they do not burn from one drive
not that of the two. Shorter than the Soviet diodes
best in the world, the Soviet trucks
the worst in the world, the Soviet watches the most
bystryev world ...

    So, if you do replace such
on KD213A (they - are VD1-VD4 in the scheme, and
small 'droplets' on the board), you can
safely hang two are not particularly voracious drive for a PSU. 
And when you add to this scheme the transistor, you can hang 
whatever you want (just so that the transformer stretched out, 
and he's pretty big). 

    Transistor must be bolted to the non-metallic base BP. Thus 
it is desirable to isolate him in the same Krenek BS. 
Finalization of a small but still nice, and saves desktop 
space. 

    For questions can call me
at the same address.

                          t.261-12-17 Vasia

    Scored Spectre.