Variable current limiter for regulator
AssigneeGeneral Electric Company
InventorsHongping Li, Vijayan Joseph Thottuvelil
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Abstract
A variable current limiter, a power supply and a method of operating a non-isolated voltage converter are disclosed herein. In one embodiment, the variable current limiter includes: (1) a converter controller configured to regulate an output voltage of a non-isolated voltage converter and limit an output current thereof and (2) a limit provider configured to provide a variable output current limit that inversely varies with the output voltage, the converter controller configured to employ the variable output current limit to limit the output current.
Claims19
A variable current limiter, comprising:
- a converter controller configured to regulate an output voltage of a non-isolated voltage converter and limit an output current thereof;
- and
- a limit provider configured to provide a variable output current limit that inversely varies with said output voltage, wherein said variable output current limit is based on an adjustment current that is proportional to said output voltage, and wherein said converter controller is configured to employ said variable current limit to limit said output current.
A method of operating a non-isolated voltage converter, comprising:
- determining a variable output current limit for an output current of said non-isolated voltage converter that is a function of an output voltage of said non-isolated voltage converter, wherein said variable output current limit is determined based on an adjustment current that is proportional to said output voltage of said non-isolated voltage converter;
- and
- controlling said non-isolated voltage converter to limit said output current based on said variable output current limit.
A power supply, comprising:
- a non-isolated voltage converter configured to receive an input voltage and provide an output voltage and an output current;
- and
- a variable current limiter that includes a limit provider configured to provide an adjustment current that is proportional to said output voltage, said variable current limiter configured to:
- determine a variable output current limit for said output current that is a function of said output voltage;
- and
- control said non-isolated voltage converter to limit said output current based on said variable output current limit.
A point of load converter, comprising:
- a pulse width modulator controller configured to regulate an output voltage of said point of load converter and limit an output current thereof;
- and
- a limit provider coupled to said converter controller and configured to provide a variable output current limit that inversely varies with said output voltage, said limit provider including:
- a fixed current limiter, and
- a limit adjuster coupled to said static current limiter and configured to provide an adjustment current that is proportional to said output voltage, wherein said limit provider employs said adjustment current and a base current limit associated with said static current limiter to provide said variable output current limit, said pulse width modulator controller configured to employ said variable current limit to limit said output current.
Dependencies are inferred from the claim text.