DEVICE AND METHOD FOR MATCHING INPUT SIGNAL FOR CONTROL OF LIGHT POWER REGULATION WITH A DRIVER OF LIGHTING WITH REGULATION OF LIGHT POWER WITH ELECTRICAL INSULATION

摘要

1. An electronic device (100), comprising: a light dimming voltage generator (310, 410) configured to receive an input dimming control signal (Vdim) indicating a light dimming amount applied to the lighting unit (20), and additionally configured to, in response to an input control signal controlling the luminous intensity, generate a light dimming voltage (V1); a pulse width modulator (320, 420, 500) configured to receive a voltage dimming voltage light (V1) and, in response to it, generating a pulse-width modulated signal (V2) having a duty cycle that is changed in response to the light dimming voltage (V1), the pulse-width modulator operating with the first supply voltage; optocoupler (330, 430), configured to receive a pulse width modulated signal (V2), and in response thereto, to output an isolated pulse width modulated signal (V3) that is galvanically isolated from a light intensity control voltage generator (310, 410) and wide no-pulse modulator (320, 420, 500), moreover, an optocoupler operating with a second supply voltage; a low-pass filter (444) configured to average an isolated pulse-width modulated signal (V3) and output the voltage control voltage (V) ; lighting driver (120), configured to receive a light control voltage (V) control voltage and input power (125) from an AC power source (30) and, in response thereto, supply power (135) to the lighting unit (20) , and the lighting driver sod