Quote:
Originally Posted by Dream Killer 
easy, you can do it for bout $7-$9.
Get a MC34063A chip and wire it up like this:
Ct = 300 pF
Rsc = 0.3 Ohm
Lmin (you can use a higher one) = 70 uH
Co = 330 uF
R = 180 Ohm
R1 =1k
R2 =10k
Vin is +12, the Vout will be 13.5V to 13.75V and a max current of 1.1A. It will have a max ripple of about 100mV at 20kHz.
PS: you're gonna need resistors rated for at 1W on R1 and R2 and please get at least the 5% ones. Use a 1N5818 for the schottkey diode.
EDIT: I forgot to label the input capacitor, use 100uH there.
easy, you can do it for bout $7-$9.
Get a MC34063A chip and wire it up like this:
Ct = 300 pF
Rsc = 0.3 Ohm
Lmin (you can use a higher one) = 70 uH
Co = 330 uF
R = 180 Ohm
R1 =1k
R2 =10k
Vin is +12, the Vout will be 13.5V to 13.75V and a max current of 1.1A. It will have a max ripple of about 100mV at 20kHz.
PS: you're gonna need resistors rated for at 1W on R1 and R2 and please get at least the 5% ones. Use a 1N5818 for the schottkey diode.
EDIT: I forgot to label the input capacitor, use 100uH there.
That's actually a very nice wire diagram and should be pretty much bang on what the PO needs. +rep
GameManicRigCreation
(17 items) |
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GameManicRigCreation
(17 items) |
$15.00 US is pretty cheap though and its a quite compact design so it might just be worth it 
Plus - it only does 100W without upgrading the heatsink, and I was thinking worst case scenario of jammed pump, where the current would increase significantly, And you don't want to run these flat out, they can burn up too! 
