Systems and methods for constant voltage control and constant current control
First Claim
1. A system controller chip for regulating a power conversion system, the system controller chip comprising:
- a first controller pin;
a second controller pin; and
a third controller pin;
wherein the system controller chip is configured to;
receive an input signal at the first controller pin and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system;
receive a first signal at the second controller pin from the switch; and
charge a capacitor through the third controller pin in response to the first signal.
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Accused Products
Abstract
System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes a first controller terminal, a second controller terminal and a third controller terminal. The system controller is configured to receive an input signal at the first controller terminal and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system, receive a first signal at the second controller terminal from the switch, and charge a capacitor through the third controller terminal in response to the first signal.
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Citations
12 Claims
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1. A system controller chip for regulating a power conversion system, the system controller chip comprising:
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a first controller pin; a second controller pin; and a third controller pin; wherein the system controller chip is configured to; receive an input signal at the first controller pin and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system; receive a first signal at the second controller pin from the switch; and charge a capacitor through the third controller pin in response to the first signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for regulating a power conversion system, the system comprising:
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a system controller including a current regulation component and a drive component, the system controller further including a first controller terminal connected to the current regulation component and a second controller terminal connected to the drive component; a feedback component connected to the first controller terminal and configured to receive an output signal associated with a secondary side of the power conversion system; and a capacitor including a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being connected, directly or indirectly, to the first controller terminal; wherein; the current regulation component is configured to receive at least a current sensing signal and affect a feedback signal at the first controller terminal based on at least information associated with the current sensing signal, the current sensing signal being associated with a primary current flowing through a primary winding of the power conversion system; and the drive component is configured to process information associated with the current sensing signal and the feedback signal, generate a drive signal based on at least information associated with the current sensing signal and the feedback signal, and provide the drive signal to a switch through the second controller terminal in order to adjust the primary current. - View Dependent Claims (8)
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9. A method for regulating a power conversion system by at least a system controller chip including a first controller pin, a second controller pin and a third controller pin, the method comprising:
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receiving an input signal at the first controller pin; turning on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system; receiving a first signal at the second controller pin from the switch; and charging a capacitor through the third controller pin in response to the first signal.
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10. A method for regulating a power conversion system by at least a system controller including a first controller terminal and a second controller terminal, the method comprising:
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generating a drive signal at the first controller terminal to turn on or off a first switch to adjust a primary current flowing through a primary winding of the power conversion system; receiving a first signal at the second controller terminal from the first switch; and generating a detection signal associated with a demagnetization process of the primary winding of the power conversion system based on at least information associated with the first signal; receiving the detection signal; receiving a current sensing signal at a third controller terminal of the system controller, the current sensing signal being associated with the primary current flowing through the primary winding of the power conversion system; generating a first processed signal based on at least information associated with the current sensing signal and the detection signal; receiving a reference voltage signal and a clock signal; generating a second processed signal based on at least information associated with the reference voltage signal and the clock signal; receiving the first processed signal and the second processed signal; generating an amplified signal based on at least information associated with the first processed signal and the second processed signal; receiving the amplified signal; generating a filtered signal based on at least information associated with the amplified signal; receiving the filtered signal and the current sensing signal; and outputting a modulation signal based on at least information associated with the filtered signal and the current sensing signal to adjust the drive signal in order to achieve constant current regulation; wherein; the system controller further includes a demagnetization detector configured to receive the first signal and generate the detection signal based at least in part on the first signal; and the second controller terminal is directly connected to the demagnetization detector.
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11. A system controller for regulating a power conversion system, the system controller comprising:
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a first controller terminal; a second controller terminal; and a third controller terminal; wherein the system controller is configured to; receive an input signal at the first controller terminal and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system; receive a first signal at the second controller terminal from the switch; and charge a capacitor through the third controller terminal in response to the first signal; wherein; the switch includes a gate terminal, a drain terminal and a source terminal; the drain terminal is directly connected to a first winding terminal of the primary winding, the primary winding further including a second winding terminal; the first controller terminal is directly connected to the gate terminal; and the second controller terminal is directly connected to the drain terminal or the source terminal.
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12. A method for regulating a power conversion system by at least a system controller including a first controller terminal, a second controller terminal and a third controller terminal, the method comprising:
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receiving an input signal at the first controller terminal; turning on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system; receiving a first signal at the second controller terminal from the switch; and charging a capacitor through the third controller terminal in response to the first signal; wherein; the switch includes a gate terminal, a drain terminal and a source terminal; the drain terminal is directly connected to a first winding terminal of the primary winding, the primary winding further including a second winding terminal; the first controller terminal is directly connected to the gate terminal; and the second controller terminal is directly connected to the drain terminal or the source terminal.
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Specification