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US 9,438,119 B1Granted
Switching power supply having loading condition remembrance and improved hold-up time characteristics
AssigneeChampion Microelectronic Corp.
InventorJeffrey Hwang
Life of this patent
Estimating the term…
Abstract
A switching power supply comprises one or more power supply stages that receive power from an input power source and that generate a regulated output voltage for powering a load by alternately opening and closing a set of switches. Controller circuitry monitors the input power source for loss of power as well as a state of the load. When loss of power is detected, the controller circuitry saves a state of the load.
Claims27
A switching power supply comprising:
- one or more power supply stages that receive power from an input power source and that generate a regulated output voltage for powering a load by alternately opening and closing a set of switches;
- and
- controller circuitry that monitors the input power source for loss of power and that monitors a state of the load, and when loss of power is detected, the controller circuitry saves a state of the load, wherein the state of the load represents a level of power drawn by the load.
A method of operating a switching power supply comprising:
- receiving power from an input power source and generating a regulated output voltage for powering a load by alternately opening and closing a set of switches;
- monitoring the input power source for loss of power;
- monitoring a state of the load;
- and saving the state of the load upon detection of loss of power by said monitoring the input power source, wherein the state of the load represents a level of power drawn by the load.
1 more element
A switching power supply comprising:
- one or more power supply stages that receive power from an input power source and that generate a regulated output voltage for powering a load by alternately opening and closing a set of switches;
- and
- controller circuitry that monitors the input power source for loss of power and that monitors a level of power drawn by the load, and when loss of power is detected, the controller circuitry disables said alternately opening and closing the set of switches a period of time after the line voltage is lost wherein the period of time is different depending upon the state of the load at the time the line voltage was lost.
Dependencies are inferred from the claim text.