Lighting driving circuit and method for removing inrush current in LED channels

A lighting driving circuit for supplying power to an LED load comprising a plurality of LED channels, the lighting driving circuit comprising:

• an input-output synchronous switch system including a switch circuit and synchronously connected to an input and an output of the lighting driving circuit;
• a rectifier circuit coupled to an input power source, comprising a rectifier bridge for converting AC power to DC power;
• a power conversion circuit connected to an output end of the rectifier circuit for conversion of the DC power;
• a power output comprising an output capacitor connected to an output end of the power conversion circuit;
• and
• a discharge circuit coupled to the switch circuit and an input end of the rectifier circuit and to a terminal of the power output,
• wherein the plurality of LED channels are connected to the power output and the switch circuit of the input-output synchronous switch system, and the switch circuit is configured to simultaneously perform a switching operation of the power supplied to the plurality of LED channels to remove any inrush current to the LED load and sends a power-off sense signal to the discharge circuit to discharge the output capacitor.

A method comprising:

• synchronously connecting an input-output synchronous switch system including a switch circuit and to an input and an output of a lighting driving circuit;
• connecting a plurality of LED channels to a power output and the switch circuit, and simultaneously performing a switching operation via the switch circuit, of power supplied to the plurality of LED channels to remove any inrush current to the LED load;
• and
• connecting a discharge circuit between an input of a rectifier circuit connected to the switch circuit, and the power output, and sending a power-off sense signal to the discharge circuit to discharge an output capacitor at the power output.