5

Revised: December 9, 2011 01:32 PM

©2011 Littelfuse, Inc

Specifications are subject to change without notice.

Please refer to http://www.littelfuse.com for current information.

Standard Bidirectional SIDACs

Kxxxzy Series

VDC(IN) ≥ VB0

VC

IL

RL

R

SIDAC

(a) Circuit

Rmax≤

VIN - VBO

IBO

Rmin≥

VIN - VTM

IH (MIN)

(b) Waveforms

VBO

VC

IL

t

t

C

Figure 13: Relaxation Oscillator Using a SIDAC

Figure 14: Low-voltage Input Circuit for Gas Ignition

4.7 µF

100 V

10 µF

50 V

24 V ac

60 Hz

4.7 µF

100 V

½ W

K1200E

Sidac

200 V

H.V.

Ignitor

1.2 µF

4.7 k

- +

- +

+

-

100-250 V ac

60 Hz

100-250 V ac

60 Hz

SCR

Sidac

Sidac

120 V ac

60 Hz

16 mH

3.3 k

0.47 µF

400 V

Ballast

Sidac

220 V ac

60 Hz

7.5 k

0.22 µF

Ballast

Lamp

120 V ac

220 V ac

Lamp

Figure 15: Comparison of SIDAC versus SCR for Gas

Ignitor Circuit

Figure 17:Typical High-pressure Sodium Lamp Firing Circuit

Figure 16: Xenon Lamp Flashing Circuit

- +

+

-

Xenon Lamp

K2200G

10 µF

2 W

120 V ac

60 Hz

10 µF

450 V

4 kV

0.01 µF

400 V

20 M

Sidac

200-

400 V

100

250 V

Trigger

Transformer

20:1