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Nonlinear response

Posted: 15 Dec 2009 ?? ?Print Version ?Bookmark and Share

Keywords:nonlinear response? output deviation voltage? output current load?

The Zilker Labs Digital-DC devices incorporate a nonlinear response (NLR) loop that decreases the response time and the output voltage deviation in the event of a sudden output load current step. The NLR loop incorporates a secondary error signal processing path that bypasses the primary error loop when the output begins to transition outside of the standard regulation limits. This scheme results in a higher equivalent loop bandwidth that what is possible using a traditional linear loop.

When a load current step function imposed on the output causes the output voltage to drop below the lower regulation limit, the NLR circuitry will force a positive correction signal that will turn on the upper MOSFET and quickly force the output to increase. Conversely, a negative load step (i.e. removing a large load current) will cause the NLR circuitry to force a negative correction signal that will turn on the upper MOSFET and quickly force the output to decrease.

View the PDF document for more information.

Click here to view related datasheets.





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