Help with DC Converter (selection of switching device, several A)

[bernardoaraujor]

Hey everyone.
I'm a Junior Hardware Developer at a Brazilian Company called Data Traffic.

I need help to design a DC Converter.
Its specs are:
- Vin: 12V
- Vout: 24V
- max Iout: 5A

A colleague suggested I use a MC33063.
Page 10 of its datasheet shows a configuration with a BJT attached to the output (https://forum.allaboutcircuits.com/attachments/mc34063a-d-pdf.115438/).
The thing is its peak output current is 1.5A (6th page of attached datasheet).
Maybe placing some other transistor in its output will allow some larger currents?
Or maybe I should go in a different direction?

https://www.onsemi.com/pub/Collateral/MC34063A-D.PDF

Anyway, any help (even different solutions) is much appreciated.

Attached Files:

 

[FvM]

MC33063/34063 is one of the cheapest switch mode controllers on the market and has rather limited performance, e.g. simple hysteretic regulation, low efficiency. Suggest to select a recent switch mode controller offered by major manufacturer's search engine, e.g. TI or Linear.

 

[KlausST]

Hi,

usually on the internet sites of switching regualtor IC manufacturers you find an interactive selction guide to choose the best controller for yor application.

Klaus

 

[aProgrammer]

one solution could be
a UC3843 and a MOSFET,

see this example (one of many):
http://danyk.cz/univ_m_en.html