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Maxim Integrated - Integration Nation
Dennis Feucht

An Instrument on a Chip? The Minimum-Subsystem Instrument

Dennis Feucht
Page 1 / 4   >   >>
RedDerek
RedDerek
8/12/2013 9:36:45 AM
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Master
Re: How about AC/DC converter in a single IC?
I am back. Just been quite busy with house work and work. I have set up the blog, just need to write it out. I am scheduling a writing session for next weekend for several blogs.

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JAYARAMAN KIRUTHI VASAN
JAYARAMAN KIRUTHI VASAN
8/12/2013 5:35:16 AM
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Master
Re: How about AC/DC converter in a single IC?
RedDerek,

Are you back from your retreat?

Any simple idea or link about the topology before we read your blog would keep us prepared.

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goafrit2
goafrit2
8/6/2013 1:50:35 PM
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Master
Re: How about AC/DC converter in a single IC?
If you have ever made a capacitor with metal and you surround with guard rings and bands, it is similar. Wish I can post a layout here but not sure who is reading from the firm. But is very close and the same process that is used to guard cap. The idea is to isolate the HV part to reduce noise in the substrate and the whole chip.

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goafrit2
goafrit2
8/6/2013 1:48:09 PM
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Master
Re: How about AC/DC converter in a single IC?
That is sill the way they design some of the HF systems today. The fab does provide process data which the design must use to design for reliability.

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RedDerek
RedDerek
7/25/2013 10:59:39 PM
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Master
Re: How about AC/DC converter in a single IC?
Let me see what I can remember and share. I will set it up on my blog list. (Just got back from being in the back country for a week - no internet and it was bliss!)

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JAYARAMAN KIRUTHI VASAN
JAYARAMAN KIRUTHI VASAN
7/23/2013 3:37:45 AM
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Master
Re: How about AC/DC converter in a single IC?
@RedDerek,

I too am eager to have a look at the layout or topology. Please post, if it is possible.

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B_Albing
B_Albing
7/18/2013 4:00:44 PM
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Editor
Re: How about AC/DC converter in a single IC?
@RedDerek - You should post a layout here or in a blog (assuming you still have some documentation handy that's not proprietary) with dimensional info added so we can see what that would look like.

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RedDerek
RedDerek
7/17/2013 5:24:55 PM
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Master
Re: How about AC/DC converter in a single IC?
When I worked with Supertex, they dealt with high voltage - up to 400V. The trick is to provide ample guard band around the high voltage and not make sharp corners. But the fab house should be able to provide all that information.

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goafrit2
goafrit2
7/17/2013 2:11:32 PM
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Master
Re: How about AC/DC converter in a single IC?
>> Also, it transforms a designer into system integrator, which many of us may not want to become.

It does happen many times and it has happened to me. There is a new poject and my boss will ask me to modify an existing circuit in a product and use in my work. He knew I could do better but there is no time. In companies, the number killer of innovation is unreasonable deadlines.

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goafrit2
goafrit2
7/17/2013 2:09:35 PM
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Master
Re: How about AC/DC converter in a single IC?
LEDs are made with special transistors which are not options in typical ICs. From my experience, the key differentiator in HV design is not just the circuit architecture but the process that is available for the desig,

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Page 1 / 4   >   >>
More Blogs from Dennis Feucht
Previously we looked at the electronics and sensors involved in data acquisition systems (DASs). Now we look at what to do with the raw ADC data once it is acquired.
This is a tutorial presentation of principles of instrumentation that is typically multi-channel, medium to high resolution (12 to 20 bits) and relatively slow - slower than oscilloscopes in sample rate
Continuing the chat from last time, we turn now to a circuit-related topic, that of current waveforms. The typical converter input waveform is shown with a static (dc) component and a ripple (ac) component
Semiconductor companies have now had fully-differential amplifiers in their product lines for a few years, though these amplifiers have been in leading-edge electronics for decades. These diff-amps are differential not only at their input but also at their output, doubling output range.
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