Negative shunt regulator > 200 mA

ezkcdude · 21st December 2006, 01:18 PM

I'd like to build a bipolar psu using a single voltage reference, likely LT1021. The data sheet says the 7- and 10 V versions can be used as shunt regulators, but it doesn't show how either a positive or negative shunt regulator would be set up with a boost transistor for handling larger amounts of current (up to 1 A or so). I could just build the series regulator, as given in the data sheet, but I would like to know how to do the shunt, as well, so I can eventually compare.

paulb · 22nd December 2006, 05:53 PM

A shunt regulator is generally only used for low currents, as it is very inefficient for higher currents. That's why the datasheet does not show it as a typical application.
You need to know the range of output current (min and max) to calculate values for a shunt regulator.

21st December 2006, 01:18 PM	#1
ezkcdude diyAudio Member Join Date: Dec 2005 Location: Atlanta	Negative shunt regulator > 200 mA I'd like to build a bipolar psu using a single voltage reference, likely LT1021. The data sheet says the 7- and 10 V versions can be used as shunt regulators, but it doesn't show how either a positive or negative shunt regulator would be set up with a boost transistor for handling larger amounts of current (up to 1 A or so). I could just build the series regulator, as given in the data sheet, but I would like to know how to do the shunt, as well, so I can eventually compare.

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22nd December 2006, 05:53 PM	#2
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	A shunt regulator is generally only used for low currents, as it is very inefficient for higher currents. That's why the datasheet does not show it as a typical application. You need to know the range of output current (min and max) to calculate values for a shunt regulator.