Primary-side control of a switching power converter with feed forward delay compensation
First Claim
1. A method comprising:
- (a) sensing a value of a current in a switching power converter during a switching cycle of the switching power converter;
(b) detecting a target peak value of the current value;
(c) adjusting the detected target peak value of the current value with a post-detection delay compensation factor to generate a delay compensated current value;
(d) determining an amount of current provided to a load coupled to the switching power converter based on the delay compensated current value; and
(e) generating a switch control signal to control the value of the current in the switching power converter to provide energy to the load in accordance with the delay compensated current value.
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Accused Products
Abstract
An electronic system includes controller to control a switching power converter to provide power to a load. To control the amount of power provided to the load, in at least one embodiment, the controller senses a current value representing a current in the switching power converter and detects when the current value reaches a target peak value. However, due to delays in the controller and/or the switching power converter, the detected target peak value will not be the actual current peak value generated by the switching power converter. In at least one embodiment, the controller adjusts the detected target peak value with a post-detection delay compensation factor to generate a delay compensated current value that more accurately represents an actual peak current value associated with the current in the switching power converter.
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Citations
22 Claims
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1. A method comprising:
- (a) sensing a value of a current in a switching power converter during a switching cycle of the switching power converter;
(b) detecting a target peak value of the current value;
(c) adjusting the detected target peak value of the current value with a post-detection delay compensation factor to generate a delay compensated current value;
(d) determining an amount of current provided to a load coupled to the switching power converter based on the delay compensated current value; and
(e) generating a switch control signal to control the value of the current in the switching power converter to provide energy to the load in accordance with the delay compensated current value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- (a) sensing a value of a current in a switching power converter during a switching cycle of the switching power converter;
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11. An apparatus comprising:
- a controller having an input to sense a value of a current in a switching power converter during a switching cycle of the switching power converter, wherein the controller is capable to;
(a) detect a target peak value of the current value;
(b) adjust the detected target peak value of the current value with a post-detection delay compensation factor to generate a delay compensated current value;
(c) determine an amount of current provided to a load coupled to the switching power converter based on the delay compensated current value; and
(d) generate a switch control signal to control the value of the current in the switching power converter to provide energy to the load in accordance with the delay compensated current value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- a controller having an input to sense a value of a current in a switching power converter during a switching cycle of the switching power converter, wherein the controller is capable to;
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21. An apparatus comprising:
- a switching power converter, wherein the switching power converter includes a transformer having a primary-side and a secondary-side;
a controller having an input to sense a value of a current in the switching power converter during a switching cycle of the switching power converter, wherein the controller is capable to;
(a) detect a target peak value of the current value;
(b) adjust the detected target peak value of the current value with a post-detection delay compensation factor to generate a delay compensated current value;
(c) determine an amount of current provided to a load coupled to the switching power converter based on the delay compensated current value; and
(d) generate a switch control signal to control the value of the current in the switching power converter to provide energy to the load in accordance with the delay compensated current value; and
a load coupled to the secondary-side of the transformer of the switching power converter. - View Dependent Claims (22)
- a switching power converter, wherein the switching power converter includes a transformer having a primary-side and a secondary-side;
Specification