Active current sharing circuit

Details Active current sharing circuit Active current sharing circuit

2005-05-17

2005-05-17

Laxton, Gary L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S285000

Reexamination Certificate

active

06894466

ABSTRACT:
An active current sharing circuit that provides a plurality of paralleled DC-DC converters each having a lossless inductor-based current sensing circuit for sensing the average current of the associated DC-DC converter through its output inductor, and a means for adjusting the voltage reference coupled to each of the DC-DC converter's PWM controllers through a one pin interconnection between the converters. The circuit provides a high percentage current sharing level at lower cost, with reduced circuit wiring complexity, and fewer components. In an alternate embodiment, the inductor-based current sensing is replaced with a resistor-based current sensing, such that comparable current sharing levels are achieved albeit with higher loss.

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