Littelfuse Kxxxzy SIDAC - Manual (Page 5)

343
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor ® brand Thyristors
Standard Bidirectional SIDACs
Kxxxzy Series
V DC(IN) ≥ V B0 V
C
I
L R L
R
SIDAC
(a) Circuit
R max ≤
V
IN
- V
BO
I
BO
R min ≥
V IN - V TM
I H (MIN)
(b) Waveforms V BO
V
C
I L
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