Can I get Transformerless ac-dc for 30-40W

[muthukural001]

Hello All,

I am looking for transformerless ac-dc converter module which supports 30W-40W...I have looked at monolithic's AC-DC module solution and looks like they do not have transformerless for 30W-40W...If anyone have come across this, please share...

Thanks and Regards,
Muthu

[capt bullshot]

What about these:

https://www.mouser.de/Search/Refine?N=18337911

SCNR, You'd have to give more specific specifications for better answers
Anyway, a "common" AC/DC for e.g. 230V AC to 12V DC at 40W wouldn't be transformerless at all, since it's technically no good to not use a transformer in this particular case.

[muthukural001]

Hi,

Our req is 5V 6A (30W) output from a AC-DC converter module which should be transformerless...If 30W without transformer is not technically possible, we are even okay with 15W transformerless ac-dc...Please anyone suggest


Thanks and Regards,
Muthu

[capt bullshot]

Hi,

Our req is 5V 6A (30W) output from a AC-DC converter module which should be transformerless...If 30W without transformer is not technically possible, we are even okay with 15W transformerless ac-dc...Please anyone suggest


Thanks and Regards,
Muthu

If your input is e.g. 8V AC, for sure you can build a transformerless suppy module outputting 5V DC / 6A using a linear regulator.
What's the reason for "transformerless" ?
Under "normal" circumstances, there's no reasonable way to build such a supply (no matter if 15W or 30W) operating with mains voltage input. A typical "transformerless" DC supply running from mains can be either built using a high voltage buck converter, or a capacitive dropper circuit. The latter one typically delivers some 10mA, the usual single inductor buck converters operating from mains are in the 1W output power ballpark.

[bdunham7]

Our req is 5V 6A (30W) output from a AC-DC converter module which should be transformerless...

Is the AC the 230VAC mains?  Or is it something else?

And by 'transformerless', do you mean you don't want a typical step-down transformer followed by a bridge and linear regulator?  Or that the device, for some odd reason, cannot contain any inductors at all?  That would be a pretty odd requirement and makes a simple task almost impossible.

[muthukural001]

Hi guys,

What about our mobile charger ?. It should have transformer but not a bulky one, that's why they are light weight and compact. I think that I should use kind of that transformer to acheive 15W (5V 3A)...  For 30W support, I am not sure the same light weight transformer will do the job or it will require a bulky one.

[tunk]

That phone charger is a switched-mode power supply (SMPS)
as is almost all of todays power supplies:
https://en.wikipedia.org/wiki/Switched-mode_power_supply

Edit: and it should not be a problem to find one with 5V and 30W.

[bdunham7]

It should have transformer but not a bulky one, that's why they are light weight and compact. I think that I should use kind of that transformer to acheive 15W (5V 3A)...  For 30W support, I am not sure the same light weight transformer will do the job or it will require a bulky one.

OK, so what you apparently need is readily available commercially, although it is not technically "transformerless":

https://www.meanwell.com/Upload/PDF/IRM-30/IRM-30-SPEC.PDF

[langwadt]

why transformerless?

[dmendesf]

https://www.st.com/content/st_com/en/products/power-management/ac-dc-converters/high-voltage-converters/viper/viper53e-e.html

[TheHolyHorse]

 I think his requirement is compact size rather than transformer less.