Lossless current sensing in low-voltage high-current DC/DC modular supplies
Dallago, E.; Passoni, M.; Sassone, G.
Industrial Electronics, IEEE Transactions on
Volume 47, Issue 6, Dec 2000 Page(s): 1249 - 1252
Digital Object Identifier   10.1109/41.887952
Summary: New data processing ICs require low-voltage high-current supplies together with high reliability and efficiency. The use of a modular power supply would be the ideal solution, but it requires detecting the current in each module, and resistive shunts are usually used. In this paper, a new lossless current-sensing circuit is presented. This lossless current transducer is obtained by applying the technique used to compensate the parasitic inductance in resistive shunts to the filter inductor of the DC/DC power supply. The causes that can influence transducer response are investigated. The current sensing was implemented in a modular DC/DC power supply and experimental results are reported.

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