Driver circuit between fluorescent ballast and LED

摘要

A driver circuit includes: a rectifier for exchanging a first current signal having a first frequency with an active fluorescent ballast, and for supplying a second current signal to a load which includes at least one light emitting diode; a switch circuit coupled to or forming part of the rectifier and configured to control an amount of power supplied to the load; and a controller configured to control the switch circuit. The switching frequency of the switch circuit is less than or equal to twice the first frequency. The controller is configured to synchronize the switching frequency of the switch circuit and the switching frequency of the active electronic ballast, which is equal to the first frequency.

主权项

1. A driver circuit for driving a load, the load comprising at least one light emitting diode, the driver circuit comprising
a rectifier for exchanging a first current signal with a fluorescent ballast and for supplying a second current signal to the load, a switch circuit coupled to or forming part of the rectifier configured to control an amount of power supplied to the load, and a controller configured to control the switch circuit, a switching frequency of the switch circuit being equal to or lower than twice a frequency of the first current signal, the fluorescent ballast comprising an active electronic ballast, the controller configured to synchronize the switching frequency of the switch circuit and a switching frequency of the active electronic ballast that is equal to the frequency of the first current signal.