DRIVER FOR LED LIGHTING FIXTURE Russian patent published in 2020 - IPC H05B33/08 H05B45/00 

FIELD: electrical engineering.

SUBSTANCE: invention relates to drivers for LED lighting fixtures. Driver includes a board, on which a rectifying diode bridge is installed, power switches, diodes, capacitors, output current stabilization unit, filter for suppression of in-phase and differential noise, current-measuring resistors, disconnected discharge resistors, light-emitting diode module, transformer, unit for analysis and control of power switch according to PFM/PWM algorithm, high-voltage capacitor. Driver additionally comprises an electromagnetic compatibility unit consisting of a unit for protection from microsecond pulse interferences of high energy of more than 1500 V, which includes varistors, a thermistor and a discharger, located on the printed-circuit board, filter for suppression of in-phase and differential noise, which includes throttles and capacitors. Unit for protection against microsecond pulse interferences of high energy of less than 1500 V consists of a capacitor, varistors and a discharger connected in parallel to the input power circuit. Output current stabilization unit includes high-voltage protection unit in the network, thermal protection unit, unit for analysis and stabilization of current through the LED module by means of control of the power switch according to PFM/PWM algorithm. Primary winding of the transformer, current-measuring resistors and the power switch are connected in series to the input circuit, and the unit for analysis and control of the power switch according to the PFM/PWM algorithm and the high-voltage capacitor are connected in parallel to the driver output. Output current stabilization unit further comprises output current pulsation smoothing unit.

EFFECT: technical result is creation of driver with protection function of LED lamp from voltage surges, higher power factor, higher driver efficiency, ruled out ripple of output current.

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