Switching mode power supply with a voltage clamping circuit
AssigneeAppulse Power Inc.
InventorAleksandar Radic
Life of this patent
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Abstract
The anti-windup circuit generally has a voltage clamping device in series with a current limiting device operatively connectable to the output current path of a feedback compensator; the feedback compensator being part of a switch-mode power supply (SMPS) having an input voltage source and a load and generating constrained control values required to generate control on-off actions for tight power regulation. The inclusion of the disclosed anti-windup circuit in an SMPS may lead to hardware based overvoltage protection, reduced overall size and faster response to load changes.
Claims18
A method for selecting a clamping voltage for a voltage clamping circuit connected in parallel with a feedback compensator of a switching mode power supply, the method comprises:
- operating the switching mode power supply, without the voltage clamping circuit, at a minimum voltage control signal;
- calculating or measuring a maximum differential analog voltage between connection points for the voltage clamping circuit, the voltage clamping circuit to be connected in parallel with an output current path of the feedback compensator at the connection points;
- selecting the clamping voltage for the voltage clamping circuit that is minimally larger than the calculated or measured maximum differential analog voltage between the connection points;
- and
- placing the voltage clamping circuit in parallel with the output current path of the feedback compensator at the connection points.
Dependencies are inferred from the claim text.