LED DRIVING AND DIMMING CIRCUIT AND CONFIGURATION METHOD

摘要

An LED driving and dimming circuit and configuration method are provided. The circuit can include a switch connected to an AC power supply, an LED driver circuit connected to the switch, a switch-status detection circuit connected to the switch, and a brightness-selection circuit having one end connected to the switch-status detection circuit and another end connected to the LED driver circuit. The switch-status detection circuit is configured to detect whether the switch is open or closed and to output a detected result to the brightness-selection circuit. The LED driver circuit is configured to control a brightness level of the LED lighting device, according to a voltage result from the brightness-selection circuit.

主权项

1. A driving and dimming circuit for driving an LED lighting device, comprising:
a switch connected to an AC power supply; an LED driver circuit connected to the switch; a switch-status detection circuit connected to the switch; and a brightness-selection circuit having one end connected to the switch-status detection circuit and another end connected to the LED driver circuit, wherein:
the switch-status detection circuit is configured to detect whether the switch is open or closed and to output a detected result to the brightness-selection circuit,the switch-status detection circuit comprises a first comparator, a second comparator, and a first capacitor, wherein the first comparator has an output end connected to an input end of the second comparator, and the first capacitor has one end connected to the output end of the first comparator and has another end grounded, andthe LED driver circuit is configured to control a brightness level of the LED lighting device, according to a voltage result from the brightness-selection circuit.