Adaptive zero-voltage switching electronic ballast - power supply circuit - Circuit Diagram

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

MOS power IC full range

Photocoupler

Adaptive zero voltage switching electronic ballast schematic

The IR2520 is mainly used to drive fluorescent lamps below 40W. The rated power of the lamp is different, and the component parameters such as Q1, Q2, L2 and C7 are slightly different. E.g. When the rated power of the lamp is in the range of 16-28W. Q1 and Q2 should use 500V, 2A MOSFET (such as IRFC420, etc.), L2 inductance value is about 1.8mH and 3.5mH, C7 capacity is usually 3.3nF-5.6nF. The higher the lamp power, the smaller the inductance value of L2, which is determined by debugging to make the lamp current close to or meet the rated current of the lamp. .