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Old 10th January 2020, 06:40 AM   #11
ColinA123 is offline ColinA123  United Kingdom
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Join Date: Jun 2017
Location: Shropshire
The intention was to use this as a low noise supply for a BA3 pre-amp.
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Old 10th January 2020, 07:07 AM   #12
FauxFrench is online now FauxFrench  France
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Location: The mountains, calm and quiet.
Quote:
Originally Posted by avtech23 View Post
Out of interest, what would be a typical use for a shunt regulator?

As "Katie" (or her dad) writes, shunt regulators can be designed for very good noise performance and very fast load step response. I guess most are used in delicate measuring designs.

The design procedure (in short) is to determine the load voltage and in particular the absolute maximum and absolute minimum load current. Design a current source (eventually just a simple power resistor) that always delivers a little more current than the absolute maximum load current, Finding a power source that ensures the current source will function well (also worst-case) but with a moderate power loss (no excessive voltage). Design a shunt-regulator with good dynamic performance that power-wise can handle the current source current minus the absolute minimum load current. In principle a straight forward design method but with a load having importantly varying consumption, you soon understand the power loss that is inherent with that type of design.

Hence, for that type of voltage regulators you design around the load characteristics. You do generally not just do as with series regulators, make a general voltage regulator and let the user find an application.

Last edited by FauxFrench; 10th January 2020 at 07:29 AM.
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Old 10th January 2020, 07:23 AM   #13
FauxFrench is online now FauxFrench  France
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Location: The mountains, calm and quiet.
Quote:
Originally Posted by ColinA123 View Post
The intention was to use this as a low noise supply for a BA3 pre-amp.

If you can tell me the operational voltage, the absolute maximum current consumption and the absolute minimum current consumption of a BA3 pre-amp, we can adapt the regulator design.
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