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6V to 12 volt@1Amp converter using MC34063

N

nikhilele

Jan 1, 1970
0
I am trying to desing a ckt which boost 6V to12V and can provide 1A
current.
MC34063 Chip cannot directly give large currents so we have to use
external booster. I am looking for that topology.

Thanks
 
N

nikhilele

Jan 1, 1970
0
I have gone through datasheet
what i want is given on page 9/16
with title:
Step-Up With External NPN Switch
But information is not complete
Which transistor to use will BD139 do
What is value of resistor connected to base of external npn will 3.3K
enough
what about other parameters will they change or we have to used as it is
 
E

ehsjr

Jan 1, 1970
0
Rich said:
I wonder where you get a 100 uH capacitor. ;-)

Cheers!
Rich

I once needed a 5000 *ohm* capacitor. I removed
it from the HV section of my Tek 485 'scope, and
mysteriously the formerly non-working 'scope came
to life. I asked my electronics "guru" about it and
he said something about the capacitor taking a leak
or something like that. He's the one who told me that
I needed to put the 5000 ohm cap into my trash can.

For the 100 uH capacitor, I guess you have to contact
the manufacturer. I thing the datasheet indicated they
are available from Typical Input, but it did not provide
address, phone #, or url.

In honor of tomorrow. :)

Ed
 
N

nikhilele

Jan 1, 1970
0
thanks due for your cool software it is really nice for beginners
 
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