Re: Suggestions for a switching regulator
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Arv, That is the best solution if you can : 1. Dissipate 2 A x (12-5)V = 14 watts continuously in a massive heatsink. 2. Be alright with a 20 watt power drain. A straightforward LM338 takes care of this. - f
Farhan
A conventional (inexpensive) linear or switching regulator can be used
to drive a higher powered BJT or MOSFET pass transistor.? This also
provides a place (the base of that pass transistor) to add even more
filtering (4700 mfd in parallel with 0.1 mfd and 0.01 mfd).?
Arv _._
On Mon, May 24, 2021 at 1:33 AM Ashhar Farhan < farhanbox@...> wrote: The LM2575 has just 1 A rating. we need 3A
On Mon, May 24, 2021 at 12:45 PM Cristian Radulescu via <criradul2001= [email protected]> wrote: Hi Ashhar,
I would suggest the LM2575 SMPS chip.
I used it many times and it seem quiet on SW bands and it will sustain 2-3 amps easily.
The schematics is simple and uses few components, a 330 microHenry inductor and a switching schotky diode (1N5819) apart from the in and out filtering capacitors.
73's de YO3IAZ, Cristian
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