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US 2015/0311804 A1Published application
Systems and methods for output current regulation in power conversion systems
AssigneeGuangzhou On-Bright Electronics Co., Ltd.
InventorLieyi Fang
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for regulating a power conversion system. An example system controller includes: a detection component configured to receive an input voltage related to a diode connected to an inductor and output a first signal at a first logic level in response to the input voltage being larger than a predetermined threshold, a control logic component configured to receive the first signal, process information associated with the first signal, and output a modulation signal related to a modulation frequency in response to the first signal being at the first logic level, and a driving component configured to receive the modulation signal and output a drive signal to open and close a first switch at the modulation frequency.
Claims29
A system controller for regulating a power conversion system, the system controller comprising:
- a detection component configured to receive an input voltage related to a diode connected to an inductor and output a first signal at a first logic level in response to the input voltage being larger than a predetermined threshold;
- a control logic component configured to receive the first signal, process information associated with the first signal, and output a modulation signal related to a modulation frequency in response to the first signal being at the first logic level;
- and
- a driving component configured to receive the modulation signal and output a drive signal to open and close a first switch at the modulation frequency, so that in response to the first switch being closed, the inductor is configured to output a first current through the switch and in response to the first switch being open, the inductor is configured to output a second current through the diode.
1 more element
A system controller for regulating a power conversion system, the system controller comprising:
- a first transistor including a first transistor terminal, a second transistor terminal, and a third transistor terminal, the first transistor terminal being coupled to a fourth transistor terminal of a second transistor, the second transistor further including a fifth transistor terminal and a sixth transistor terminal;
- wherein:
- the fifth transistor terminal is coupled to a first resistor terminal of a first resistor, the first resistor further including a second resistor terminal;
- the fifth transistor terminal is coupled to a first diode terminal of a first diode, the first diode further including a second diode terminal;
- the second diode terminal is coupled to the second resistor terminal;
- wherein the system controller is configured to change a first voltage of the fourth transistor terminal to turn on and off the second transistor and to affect a current flowing through an inductor.
3 more elements
A system controller for regulating a power conversion system, the system controller comprising:
- a detection component configured to detect one or more peak magnitudes of a current sensing signal associated with a first current from an inductor flowing through a switch and generate an output signal based on at least information associated with the detected one or more peak magnitudes of the current sensing signal;
- an error amplifier configured to receive the output signal and a reference signal and generate an amplified signal based on at least information associated with the output signal and the reference signal;
- a comparator configured to receive the current sensing signal and a first signal associated with the amplified signal and output a comparison signal based on at least information associated with the first signal and the current sensing signal;
- and
- a control-and-drive component configured to receive the comparison signal and output a drive signal based on at least information associated with the comparison signal to close or open the switch to affect the first current.
2 more elements
A system controller for regulating a power conversion system, the system controller comprising:
- a protection component configured to receive a first signal and a second signal and generate a third signal based on at least information associated with the first signal and the second signal, the first signal being associated with a demagnetization period related to an inductor, the second signal being associated with a first current flowing through the inductor;
- and
- a control-and-drive component configured to receive the third signal and output a drive signal to the switch to affect the first current;
- wherein:
- the protection component is further configured to, in response to,
- the second signal indicating, during a first switching cycle associated with the drive signal, that the first current is equal to or larger than a current threshold, and
- the first signal indicating, during an off-time period of the first switching cycle, that the demagnetization period is smaller than a predetermined time period,
- change the third signal from a first signal state to a second signal state to cause the power conversion system to be shut down.
5 more elements
A method for regulating a power conversion system, the method comprising:
- receiving an input voltage related to a diode connected to an inductor;
- processing information associated with the input signal;
- outputting a first signal at a first logic level in response to the input voltage being larger than a predetermined threshold;
- receiving the first signal;
- processing information associated with the first signal;
- outputting a modulation signal related to a modulation frequency in response to the first signal being at the first logic level;
- receiving the modulation signal;
- processing information associated with the modulation signal;
- outputting a drive signal to open and close a first switch at the modulation frequency;
- in response to the first switch being closed, outputting a first current through the switch;
- and
- in response to the first switch being open, outputting a second current through the diode.
9 more elements
A method for regulating a power conversion system, the method comprising:
- sampling one or more peak magnitudes of a current sensing signal associated with a first current from an inductor flowing through a switch;
- generating an output signal based on at least information associated with the detected one or more peak magnitudes of the current sensing signal;
- receiving the output signal and a reference signal;
- processing information associated with the output signal and the reference signal;
- generating an amplified signal based on at least information associated with the output signal and the reference signal;
- receiving the current sensing signal and a first signal associated with the amplified signal;
- processing information associated with the current sensing signal and the first signal;
- outputting a comparison signal based on at least information associated with the first signal and the current sensing signal;
- receiving the comparison signal;
- processing information associated with the comparison signal;
- and
- outputting a drive signal based on at least information associated with the comparison signal to close or open the switch to affect the first current.
9 more elements
A method for regulating a power conversion system, the method comprising:
- receiving a first signal and a second signal;
- processing information associated with the first signal and the second signal;
- generating a third signal based on at least information associated with the first signal and the second signal, the first signal being associated with a demagnetization period related to an inductor, the second signal being associated with a first current flowing through the inductor;
- receiving the third signal;
- processing information associated with the third signal;
- outputting a drive signal to the switch to affect the first current;
- and
- in response to, the second signal indicating, during a first switching cycle associated with the drive signal, that the first current is equal to or larger than a current threshold and the first signal indicating, during an off-time period of the first switching cycle, that the demagnetization period is smaller than a predetermined time period, changing the third signal from a first signal state to a second signal state to cause the power conversion system to be shut down.
5 more elements
Dependencies are inferred from the claim text.