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Registered Member #205
Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
Looking into this subject to broaden my knowledge of matter. I would like to be able to create a bias og 20V or so, above up to 1200V just like it is done inside the popular Hbridge driver chips for example HIP408x from Intersil.
Are there chips available for this purpose, with the needed voltage standoff, or must I build with discretes?
Registered Member #1232
Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
Hi Finn.
Although a charge-pump circuit is one option, you might also want to look at DC-DC converters to provide floating supplies for high-side power devices.
They are often available with input to output isolation voltages of a few kv.
An idea about floating smps - a power supply for those hallogen lamps (electronic transformers). It seems that there is plenty of room to wind your own secondaries. ( I have a Philips one). The core is covered with some kind of plastic (the insulation shoud be fairly good). And they cost like 5$. The down side - to get it going you have to load it quite heavily. Also there is the 100hz problem ... link for more info :) (somewhere after the middle)
Registered Member #205
Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
GeordieBoy wrote ...
Hi Finn.
Although a charge-pump circuit is one option, you might also want to look at DC-DC converters to provide floating supplies for high-side power devices.
They are often available with input to output isolation voltages of a few kv.
-Richie,
Oh Yes, I had forgotten about those little critters. Fact is, I fell in love with the term "Charge Pump" and that clouded my mind.
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Charge pumps
