ICC03-400B2 Datasheet, PDF (7/7 Pages) STMicroelectronics – IGNITION CONTROL CIRCUIT

R RESISTOR CALCULATION
The purpose of the resistor R is to limit the current
I_G through the thyristor gate. Its maximum value
can be calculated as follow :
R max = (Vs min - VGT max) / 2 IGT max
POWER LOSSES (For 20µs - see note 1)
The following equations can be used to evaluate
power losses :
For TH V_TO = 2.65V Rt = 0.110 Ω
For D2 VFO = 1.73V Rd = 0.075 Ω
ICC03-400B2
PROTECTION AGAINST PARASITIC SPIKES
The capacitor C2 in relation with R acts as a filter
and avoids the unexpected firing of the thyristor
due to parasitic spikes. Good results have been
obtained with 10nF capacitance.
PACKAGE MECHANICAL DATA
DIL8 (Plastic)
I
a1
L
B
B1
b
e
Z
e3
D
8
5
1
4
b1
F
E
Marking : ICC3-400
Weight : 0.59 g
DIMENSIONS
REF. Millimetres
Inches
Min. Typ. Max. Min. Typ. Max.
a1 0.70
0.027
B 1.39
1.65 0.055
0.065
B1 0.91
1.04 0.036
0.041
b
0.5
0.020
b1 0.38
0.50 0.015
0.020
D
9.80
0.385
E
8.8
0.346
e
2.54
0.100
e3
7.62
0.300
F
7.1
0.280
I
4.8
0.189
L
3.3
0.130
Z 0.44
1.60 0.017
0.063
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsIbility for the consequences of
use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by
implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to
change without notice. This publication supersedes and replaces all information previously supplied.
STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written ap-
proval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 1998 STMicroelectronics - Printed in Italy - All rights reserved.
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands
Singapore - Spain - Sweden - Swit zerland - Taiwan - Thailand - United Kingdom - U.S.A.
7/7