Three-port Resonant LED Driver Combined with VPPM Visible Light Communication Modulation Strategy

A three-port LED driver by combining resonant switchedcapacitor (RSC) circuit unit is proposed. Combined with the proposed driver, a control strategy incorporating Variable Pulse Position Modulation (VPPM) visible light communication modulation with power conversion LED driver is proposed, which the position of the output pulse current is utilized to realize data transmission, and the brightness adjustment required for communication is completed by adjusting the width of the output pulse current, and the output average current can be controlled to be constant. The computer simulation have been carried out. An experimental prototype of the proposed driver and its hybrid control strategy with a rated output of
$0.6{\mathrm{A}}/20{\mathrm{W}}$
is designed and set up. The simulation and experimental results have been obtained to verify the proposed three-port LED driver and its hybrid control strategy.