Best ICs for 12V 30A Buck Converter with 19.5V/24V Input Recommendations

Hello,

I am currently trying to design a buck converter with the following specs:
V in: either 19.5V or 24V nominal
V out: 12V
I out max: 30A

Unfortunately i am struggeling to find the right IC for the job, as most 24Vin converters/controllers are optimized for <5V output. Is there any good option for my requirements?

Hello.
I suggest to take a look this this article:

https://www.powerelectronicsnews.com/power-su...design-notes-how-to-optimize-your-sic-device/

It is a calculator to build any type of convertitor.

Cheers
Giovanni

The 30A output will probably need additional circuitry. I would start out by using the WebBench designer on the TI website. It works very well. Just plug in your requirements that you have listed and it will produce several alternative designs. It may go up to 30A output current.

As I recall Linear Tech (now Analog Devices) had a similar design package, and also Microchip although I don’t think Microchip will have as wide a range as the others.

Good luck.

The sites mentioned are good for the design and simulation side of things, but be aware that you also need to read up on the pcb layout methodology for the chosen smps configuration. You will have very large circulating currents and high peak power, poor design will mean destroyed components, and significant radiated and conducted noise. There are many controllers designed for this type of application, it is the external components that dictate the input and output capabilities in most cases. As Aubrey said, TI and Analog Devices are a good place to start,
for example,
https://www.analog.com/en/parametricsearch/11...&qsfv=vinmin|18_vinmax|24_vout|12_iout|30
cheers,
Richard

Let me add to Richard’s excellent comments. You will have to pay close attention to the width and plating thickness of the tracks on the PCB. Keep in mind that 10mOhm will dissipate 9W at 30A and drop 300mV. You will also need some pretty hefty connectors. Keep in mind that they too have a resistance. And finally, you are producing 12X30=360W. Assume that you manage to make a great converter and you get 90% efficiency. That means 10%=36W is dissipated by your electronics. You are going to need a lot of heat sinking.

As always. I have settled on a multiphase design, to also spread the heat across multiple components, as well as heat sinking.