Electronics > Beginners

step-up or boost with MC34063

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gbg:
I simulate this but don`t work

T3sl4co1l:
C1 330p, not 33p.

FYI, if you're looking for an out-of-the-box solution that doesn't require adjustment, this is not it.

There are more reliable, discrete circuits possible, but they require more components and/or coupled inductors, and even more adjustment to create, if not necessarily to fit to a given end use.

Stick with commercial boost regulators and follow the application notes. :-+

Tim

gbg:
OPS
I create new but not work

ogden:

--- Quote from: gbg on February 25, 2019, 04:59:00 pm ---OPS
I create new but not work

--- End quote ---

Then drop it. If you can't run it in simulation using ideal components, then in real life it will not work for sure.

Refrigerator:

--- Quote from: gbg on February 24, 2019, 05:21:12 pm ---
I can not find BSZ0920NS.

--- End quote ---
Any mosfet with a low enough Vgs should work, IRF44 will not work because Vgs is too high.
I personally use mosfets from motherboards.

--- Quote from: gbg on February 25, 2019, 04:59:00 pm ---OPS
I create new but not work

--- End quote ---
I ran the simulation myself and sure enough it doesn't work with an IRLZ44N but any other switching mosfet does work.
PS: the circuit originally used a 2N3904 but i modified this one to work with a 2n2222.
Also if you don't have LTspice already, please get it because it's awesome (and free).

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