App note: 2-wire virtual remote sensing for voltage regulators

in app notes by DP | 0 comments

Here is an app note from Linear Technology describing the use of virtual remote sensing of wiring voltage drops in power supply designs.

Here, the LT4180 Virtual Remote Senseā„¢ (VRS) IC alternates output current between 95% and 105% of the nominal required output current. The LT4180 forces the power supply to provide a DC current plus a small square wave current with peak-to-peak amplitude equal to 10% of the DC current. Decoupling capacitor CLOAD, normally required for low impedance under transient conditions in non-VRS systems, takes an additional role by fi ltering out the VRS square wave excursions.



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