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yungman
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As the tittle, I am looking for off line switching supply of about 400VDC output. Anyone know who make this?
Thanks
Alan
Thanks
Alan
mdjensen22 said:Does something like this http://www.powerint.com/sites/default/files/PDFFiles/rdr236.pdf work? (380V).
It's overkill in terms of current, but it can be purchased which saves you some trouble if you only need a one-off. http://www.digikey.com/product-detail/en/RDK-236/596-1418-ND/2533771
My bad - I just went by their little check box that said "isolated". I guess I could have looked at the doc. On Semi has one they are marketing as isolated as well. This may be worth looking at as well...yungman said:Thanks for you input. I read over the doc quickly. I think it is not isolated. I need a true off line supply that isolate from the AC side.
Thanks
Alan
mdjensen22 said:My bad - I just went by their little check box that said "isolated". I guess I could have looked at the doc.
On Semi has one they are marketing as isolated as well. This may be worth looking at as well...
http://www.digikey.com/product-detail/en/NCP1606BOOSTGEVB/NCP1606BOOSTGEVBOS-ND/2337352
es1 said:Not sure if you prefer to make or buy.
To Buy:
http://www.home.agilent.com/agilent...ng&ckey=839427&nid=-35687.384733.00&id=839427
About $7K
To Make:
At the 80W range the typical solution is to use a PFC boost fed from the line to get a large intermediate voltage, like 500V. Then drop that down with an isolated flyback.
These data sheets give you most of what you need to design the application circuit.
http://www.irf.com/technical-info/appnotes/an-1077.pdf
http://cds.linear.com/docs/Datasheet/3748fa.pdf
dittoYes I am cheap...very cheap!
jim hardy said:ditto400V 200ma ,, only 80 watts?
is there enough room in a PC 200 watt supply to remove one or more of the high current 5volt windings from the donut and replace them with 400 volt windings of tiny wire?
Or disconnect one and use it to energize another donut with your hv windings?
Obviously you'd not pick the one that's used for regulation feedback.
Seems to me you get a volt or two per turn on those things
Tedious, but you can't beat that for cheap.
you'll need fast high voltage rectifiers... i am not fluent in those.
1 Introduction
The UCC28517 module is a 100-W offline ac-to-dc voltage converter with power factor correction (PFC). The
prototype was designed to show how the UCC28517 could be configured to control two dc-regulated outputs
offline with one control integrated circuit. The module was design to operate over a universal input range of 85
V to 265 V with two dc regulated outputs. Output B is a 12-V, 8-W regulated output intended to be used as a
bias supply and output A is a 385-V, 100-W regulated output.
jim hardy said:Yungman
among the debirs on my hard drive was an appnote for this TI IC
UCC28517 EVM
document number is SLUU117C − September 2002 − Revised July 2003
has partslist including the inductor and pcb layout
A switching supply is a type of power supply that converts incoming electrical energy into a different form of electrical energy. It uses a switching regulator to control the output voltage and current, and is commonly used in electronic devices.
In some electronic devices, a higher voltage is needed to power certain components. A switching supply with 110V AC in and about 400V DC out allows for efficient conversion and regulation of the input voltage to the desired output voltage.
A switching supply with 110V AC in and about 400V DC out uses a transformer to step down the incoming AC voltage to a lower voltage, which is then converted to DC by a rectifier. The DC voltage is then switched on and off rapidly by a switching regulator to achieve the desired output voltage.
Using a switching supply allows for efficient conversion and regulation of voltage, resulting in less energy loss and heat generation compared to other types of power supplies. It also allows for a smaller and more compact design, making it ideal for use in electronic devices with limited space.
One potential drawback is that switching supplies can generate electromagnetic interference (EMI) due to the rapid switching of currents. This can interfere with other electronic devices and may require additional shielding. Additionally, switching supplies may be more complex and expensive to design and manufacture compared to other types of power supplies.