Re: 24W DC to DC converter

On Feb 6, 9:58 pm, raseelm...@xxxxxxxxx wrote:
Hi,
I want to design a DC to DC converter. The input voltage will vary
from 9.5v to 33 volts and. Output voltage should be 12V 2A. Can anyone
suggest me the best topology and PWM controller should i use for this
circuit? the total BOM should be below $3.4.


The input voltage range includes the output voltage, and that suggests
searching for a "buck-boost" controller, or a "SEPIC" controller. Try
the usual suspects: Linear Technology, Maxim, ... Their web sites
will have product data sheets and ap notes. See, for example, Maxim
ap note 1161 for a somewhat similar design The cost will depend
heavily on how many you want to build; one-off, you may have some
trouble making it for $3.40. You didn't mention if you want the
output isolated from the input or not, nor what efficiency you'd like
to attain, by the way.

Cheers,
Tom

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