BOOST CONVERTER STAGE SWITCH CONTROLLER

摘要

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.

主权项

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; andsynchronize assertions of a switch control signal with the edge transitions.