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US 8,077,483 B2Granted
Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller
AssigneePower Integrations, Inc.
InventorsAlex B. Djenguerian, Balu Balakrishnan
Life of this patent
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Abstract
An example controller for a power converter according to aspects of the present invention includes a switching control that switches a power switch to regulate an output of a power converter. The controller also includes a sensor coupled to receive a signal from a single terminal of the controller. The signal from the single terminal is representative of a line input voltage of the power converter during at least a portion of an on time of the power switch. The signal from the single terminal is also representative of an output voltage of the power converter during at least a portion of an off time of the power switch. The switching control is responsive to the sensor.
Claims35
A controller for a power converter, comprising:
- a switching control that switches a power switch to regulate an output of the power converter;
- and
- a sensor coupled to receive a signal from a single terminal of the controller, the signal from the single terminal to represent a line input voltage of the power converter during at least a portion of an on time of the power switch, the signal from the single terminal to represent an output voltage of the power converter during at least a portion of an off time of the power switch, wherein the switching control is responsive to the sensor.
A controller for a power converter, comprising:
- a terminal;
- a switching control that switches a power switch to regulate an output of the power converter;
- a sensor coupled between the terminal and the switching control, the sensor coupled to sense a voltage at the terminal of the integrated controller, wherein the sensed voltage is representative of an output voltage of the power converter, and wherein the sensor is further coupled to sense a current at the terminal of the integrated controller, wherein the sensed current is representative of an input voltage of the power converter, and wherein the switching control switches the power switch in response to the sensor.
A controller for a power converter, comprising:
- a switching control that switches a power switch to regulate an output of the power converter;
- a sensor coupled to receive a signal from a terminal of the controller, the signal from the terminal to represent a line input voltage of the power converter during at least a portion of an on time of the power switch, the signal from the terminal to represent an output voltage of the power converter during at least a portion of an off time of the power switch, the sensor coupled to sample the signal from the terminal during the portion of the off time of the power switch and to generate a sample output voltage signal, and the sensor coupled to sample the signal from the terminal during the portion of the on time of the power switch and to generate a sample input line voltage signal;
- and
- an output regulator coupled between the sensor and the switching control, the output regulator coupled to output an output regulation signal to the switching control, wherein the switching control switches the power switch in response to the output regulation signal to regulate the output voltage of the power converter.
1 more element
A controller for a power converter, comprising:
- a switching control that switches a power switch to regulate an output of the power converter;
- a sensor coupled to receive a signal from one terminal of the controller, the signal from the one terminal to represent a line input voltage of the power converter during at least a portion of an on time of the power switch, the signal from the one terminal to represent an output voltage of the power converter during at least a portion of an off time of the power switch, the sensor coupled to sample the signal from the one terminal during the portion of the on time of the power switch and to generate a sample input line voltage signal and the sensor coupled to sample the signal from the one terminal during the portion of the off time of the power switch and to generate a sample output voltage signal;
- and
- a constant current regulator coupled between the sensor and the switching control, the constant current regulator coupled to output a constant current signal to the switching control to regulate an output current of the power converter in response to the sample output voltage signal.
1 more element
A controller for a power converter, comprising:
- a feedback terminal coupled to receive a voltage that is representative of an output voltage of the power converter when a power switch of the power converter is in an off state, the feedback terminal further coupled to receive a current that is representative of an input line voltage of the power converter when the power switch is in an on state;
- a sensor coupled to the feedback terminal and coupled to sample the current received at the feedback terminal during the on state of the power switch and to generate a sample input line voltage signal in response to the received current, the sensor coupled to sample the voltage received at the feedback terminal during the off state of the power switch and to generate a sample output voltage signal in response to the received voltage;
- and
- a switching control coupled to output a drive signal to control switching of the power switch between the on state and the off state to regulate an output of the power converter, wherein the switching control is responsive to the sample input line voltage signal and the sample output voltage signal.
1 more element
Dependencies are inferred from the claim text.