Fig. 2 : Spark frequency versus Rs and C

Fig. 3 : Voltage across the capacitance with Rs = 15k

4.7

6.8

10

12

15

18

22

27 30

1

2

3

5

10

20

F (Hz)

Rs (k )

Ω

Vac=220Vrms, Vbo=225V, Tamb=25

°C

C=3.3

F

µ

C=2.7

F

µ

C=2.2

F

µ

C=0.47

F

µ

C=0.47

F

µ

C=1

F

µ

C=1

F

µ

C=1.5

F

µ

C=1.5

F

µ

The couple Rs/C can be chosen with the previous

curve. Keep in mind the Rs maximum limit for

which the system would not work when the AC

mains is minimum. The next curve shows the

behavior with Rs=15k

Ω and C=1µF.

FLC01-200D

5/7