Boost converter stage switch controller
First Claim
1. A switch controller, comprising:
- a set of one or more controller inputs, including;
a transformer input configured to receive a transformer signal from an electronic transformer; and
controller logic configured to;
detect edge transitions of the transformer signal;
generate a switch control signal for a switch configured to influence a current path of an inductor current of an inductor coupled to the electronic transformer; and
synchronize assertions of a switch control signal with the edge transitions.
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Accused Products
Abstract
A low voltage lamp includes a boost converter stage and a load. The load may include low voltage light producing elements including low voltage light emitting diodes. The boost converter stage receives an electronic transformer output and includes an inductor coupled to a switch and a switch controller that receives one or more controller inputs. Inductor current may be returned to the transformer when the switch is closed and provided to a rectifier coupled to the load when the switch is open. Controller inputs may include a transformer input that receives the transformer output, a sense input indicating switch current, and a load input indicating load voltage. Controller logic may synchronize assertions of a control signal for the switch with edge transitions of the transformer output to maintain peak inductor current within a specified range and to selectively transfer stored energy in the inductor to the load or back to the transformer.
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Citations
35 Claims
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1. A switch controller, comprising:
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a set of one or more controller inputs, including; a transformer input configured to receive a transformer signal from an electronic transformer; and controller logic configured to; detect edge transitions of the transformer signal; generate a switch control signal for a switch configured to influence a current path of an inductor current of an inductor coupled to the electronic transformer; and synchronize assertions of a switch control signal with the edge transitions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A low voltage apparatus suitable for use with an electronic transformer configured to generate a transformer output signal including a transformer output current and a transformer output voltage, the low voltage apparatus comprising:
a boost converter stage comprising; an inductor configured to receive the transformer output current as an inductor current; a rectifier configured to generate a rectified current by rectifying the inductor current; a switch configured to influence a current path of the rectified current in accordance with a switch control signal; and a controller, comprising; at least one controller input, including; a transformer input configured to receive the transformer output voltage; and controller logic configured to synchronize transitions of the switch control signal with transformer output transitions indicated by the transformer input. - View Dependent Claims (30, 31)
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32. A switch control method, comprising:
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receiving a set of one or more controller inputs, wherein the controller inputs include a transformer output of an electronic transformer; and generating a switch control signal based, at least in part, on the controller inputs, wherein the switch control signal is configured to control a conductive state of a switch configured to influence a current path of a rectified current generated by a rectifier configured to rectify an inductor current of an inductor coupled to the transformer output; and synchronizing assertions of the switch control signal with transitions of the transformer output. - View Dependent Claims (33, 34, 35)
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Specification