K0900E70 View Datasheet(PDF) - Littelfuse, Inc
Part Name
Description
Manufacturer
K0900E70 Datasheet PDF : 7 Pages
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Sidac
Data Sheets
(a) Circuit
VDC(IN) ≥ VB0
R
SIDAC
VC
VBO
VC
(b) Waveforms
t
C
IL
RL
IL
Rmax ≤
VIN - VBO
IBO
t
Rmin ≥
VIN - VTM
IH (MIN)
Figure E9.15 Relaxation Oscillator Using a Sidac
Input
(See Note B)
2N6127
(or equivalent)
RBB1 =
150 Ω
50 Ω
50 Ω
RBB2 =
100 Ω
VBB1 =10 V
+ VBB2 =0
-
Test Circuit
VCE Monitor
TIP-47
100 mH
+
VCC = 20 V
-
RS = 0.1 Ω
IC Monitor
Input
Voltage
0V
5V
Collector
Current
0.63 A
0
Sidac VBO
tw ≈ 3 ms
(See Note A)
tw
100 ms
Collector
Voltage
10 V
VCE(sat)
Voltage and Current Waveforms
Note A: Input pulse width is increased until ICM = 0.63 A.
Note B: Sidac (or Diac or series of Diacs) chosen so that VBO is just below VCEO rating of transistor to be protected.
The Sidac (or Diac) eliminates a reverse breakdown of the transistor in inductive switching circuits where otherwise the
transistor could be destroyed.
Figure E9.16 Sidac Added to Protect Transistor for Typical Transistor Inductive Load Switching Requirements
Ballast
H.V.
Step-up
Transformer
0.1 – 0.15 µF
220 V / 240 V
50 / 60 Hz
0.22 – 0.33µF
K2401F1
5 – 6µH
Metal
Halide
Lamp
5.6K – 8.2K
5W
Figure E9.17 Typical Metal Halide Ignitor Circuit
http://www.littelfuse.com
+1 972-580-7777
E9 - 6
©2004 Littelfuse, Inc.
Thyristor Product Catalog
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