Switch state controller with a sense current generated operating voltage
First Claim
1. An apparatus comprising:
- a controller, wherein the controller is configured to;
operate during at least one controller operational mode from an operating voltage generated from at least a first portion of a first sense current, wherein the first sense current is resistively derived from and senses at least one of;
(i) a rectified input line voltage and (ii) an output voltage of a switching power converter, wherein the at least one controller operational mode comprises a start-up-mode of the controller;
receive at least a second portion of the first sense current concurrently with the first portion of the first sense current; and
use the second portion of the first sense current to control a switching operation of the switching power converter.
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Accused Products
Abstract
A power supply system and method includes a switch state controller that is operational to control a switching power converter during certain power loss conditions that cause conventional switch state controllers to have diminished or no functionality. In at least one embodiment, during certain power loss conditions, such as when an auxiliary power supply is in standby mode or when the switching power converter is not operating, a power supply for the switch state controller does not provide sufficient operating power to the switch state controller during certain power loss conditions. In at least one embodiment, during such power loss conditions power is generated for the switch state controller using sense input and/or sense output currents of the switching power converter to allow an integrated circuit (IC) switch state controller to generate a control signal to control a switch of the switching power converter.
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Citations
30 Claims
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1. An apparatus comprising:
a controller, wherein the controller is configured to; operate during at least one controller operational mode from an operating voltage generated from at least a first portion of a first sense current, wherein the first sense current is resistively derived from and senses at least one of;
(i) a rectified input line voltage and (ii) an output voltage of a switching power converter, wherein the at least one controller operational mode comprises a start-up-mode of the controller;receive at least a second portion of the first sense current concurrently with the first portion of the first sense current; and use the second portion of the first sense current to control a switching operation of the switching power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
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operating a controller during at least one controller operational mode from an operating voltage generated from at least a first portion of a first sense current, wherein the first sense current is resistively derived from and senses at least one of;
(i) a rectified input line voltage and (ii) an output voltage of a switching power converter, wherein the at least one controller operational mode comprises a start-up-mode of the controller;receiving in the controller at least a second portion of the first sense current concurrently with the first portion of the first sense current; and using the second portion of the first sense current to control a switching operation of the switching power converter. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An apparatus comprising:
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means for operating a controller during at least one controller operational mode from an operating voltage generated from at least a first portion of a first sense current, wherein the first sense current is resistively derived from and senses at least one of;
(i) a rectified input line voltage and (ii) an output voltage of a switching power converter, wherein the at least one controller operational mode comprises a start-up-mode of the controller;means for receiving in the controller at least a second portion of the first sense current concurrently with the first portion of the first sense current; and means for using the second portion of the first sense current to control a switching operation of the switching power converter.
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Specification