Systems and methods for regulating output currents of power conversion systems
First Claim
1. A system controller for a power converter, the system controller comprising:
- a first controller terminal configured to output a drive signal to a switch to affect a first current flowing through a primary winding of a power converter, the drive signal being associated with an on-time period, the switch being closed during the on-time period;
a first current-signal generator configured to generate a second current based at least in part on a first signal; and
a ramp-signal generator configured to generate a ramping signal based at least in part on the second current, the ramping signal being associated with a ramping slope;
wherein the system controller is configured to;
adjust a duration of the on-time period based at least in part on the first signal, the first signal being associated with an input signal for the primary winding of the power converter, the input signal corresponding to an input voltage; and
adjust the duration of the on-time period by adjusting the ramping slope of the ramping signal based at least in part on the first signal.
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Accused Products
Abstract
Systems and methods are provided for regulating a power conversion system. An example system controller includes a first controller terminal and a second controller terminal. The first controller terminal is configured to receive a first signal associated with an input signal for a primary winding of a power conversation system. The second controller terminal is configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being closed during the on-time period. The system controller is configured to adjust a duration of the on-time period based on at least information associated with the first signal.
177 Citations
36 Claims
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1. A system controller for a power converter, the system controller comprising:
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a first controller terminal configured to output a drive signal to a switch to affect a first current flowing through a primary winding of a power converter, the drive signal being associated with an on-time period, the switch being closed during the on-time period; a first current-signal generator configured to generate a second current based at least in part on a first signal; and a ramp-signal generator configured to generate a ramping signal based at least in part on the second current, the ramping signal being associated with a ramping slope; wherein the system controller is configured to; adjust a duration of the on-time period based at least in part on the first signal, the first signal being associated with an input signal for the primary winding of the power converter, the input signal corresponding to an input voltage; and adjust the duration of the on-time period by adjusting the ramping slope of the ramping signal based at least in part on the first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system controller for a power converter, the system controller comprising:
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a ramp-signal generator configured to receive a first signal associated with a compensation signal and generate a ramping signal based at least in part on the first signal, the ramping signal being associated with a ramping slope, the compensation signal being associated with a first current flowing through a primary winding of a power converter; and a controller terminal configured to output a drive signal to a switch based at least in part on the ramping signal to affect the first current; wherein the system controller is configured to adjust the ramping slope of the ramping signal based at least in part on the compensation signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method for regulating a power converter, the method comprising:
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receiving a first signal associated with a compensation signal, the compensation signal being associated with a current flowing through a primary winding of a power converter; generating a ramping signal based at least in part on the first signal, the ramping signal being associated with a ramping slope; adjusting the ramping slope of the ramping signal based at least in part on the compensation signal; and generating a drive signal based at least in part on the ramping signal; and outputting the drive signal to a switch to affect the current.
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Specification