EEVblog Electronics Community Forum

Electronics => Projects, Designs, and Technical Stuff => Topic started by: ali_asadzadeh on November 11, 2024, 11:19:05 am

Title: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: ali_asadzadeh on November 11, 2024, 11:19:05 am
I  Have seen this power supply that has a 5W 5V/1A out put from a 210VDC ~ 1800VDC, I wonder what topology or circuit they have used, and Ideas?

See the specs for the Auxiliary Power (PWR-DC1500) in the attached PDF catalogue.
Title: Re: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: Manul on November 11, 2024, 03:35:17 pm
The input range is indeed very wide. I would probably go with two switch forward converter using SiC mosfets.
Title: Re: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: ali_asadzadeh on November 12, 2024, 12:46:17 pm
The price is unbelievably low, the price for the whole 24 input package is around 50$
So I do not think they have used such thing, Maybe a buck convertor? I do not have the unit for now, so I can not open it to see what's inside :palm:
Title: Re: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: ali_asadzadeh on November 13, 2024, 11:12:21 am
I'm wondering if it could be done with old tech, something like TL494 in a buck config, what's your Idea?
Title: Re: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: Manul on November 13, 2024, 11:39:18 am
I don't know. It would be very hard to achieve such high step down ratio (1800V/5V) with a buck topology. Furthermore, I think it should be isolated topology. So maybe one/two switch forward or flyback.
Title: Re: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: Andy Chee on November 13, 2024, 08:40:06 pm
I think you'd definitely want two switch topology with such high voltages. 

This saves the hassle of primary side clamping/snubbing of kV voltages!
Title: Re: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: ali_asadzadeh on November 14, 2024, 11:00:12 am
Quote
I think you'd definitely want two switch topology with such high voltages.

This saves the hassle of primary side clamping/snubbing of kV voltages!
So what cheap choices do we have in this topology? and recommended part numbers?
Title: Re: Any Ideas about a 210VDC ~ 1800VDC input power supply?
Post by: Andy Chee on November 14, 2024, 11:15:00 am
Practically any PWM controller is capable of driving a two switch forward or two switch flyback, including the TL494.