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U208B Datasheet, PDF (1/7 Pages) TEMIC Semiconductors – Open Loop Phase Control Circuit
Open Loop Phase Control Circuit
U208B
Description
The integrated circuit, U208B, is designed as a phase con-
trol circuit in bipolar technology with internal
supply-voltage monitoring. As the voltage is built up, un-
controlled output pulses are avoided by internal
monitoring. Furthermore, it has internal-current and volt-
age synchronisation. It is recommended as a low cost
open-loop control.
Features
D Automatic retriggering
D Triggering pulse typ. 125 mA
D Voltage and current synchronisation
D Internal supply voltage monitoring
D Current requirement ≤ 2.5 mA
Package: DIP8
Block Diagram
R3
220 kW/
0.5 W
7
R4
470 kW/
0.5 W
8
Voltage Current
detector detector
Automatic
retriggering
BYT77
D1
L
W 18 k /
2W
R1
M
95 11224
Output
3
pulse
R7
180 W
TIC
236N
VM =
230 V ~
4
R2
180 kW
R6
18 kW
100 kW
6
R5
120 kW
Phase
control unit
ö = f (V6)
10 nF
5
C2
2
Supply
voltage
limitation
–VS
1
C1
22 mF/
25 V
N
Voltage
GND
monitoring
Figure 1. Block diagram for simple phase control system
TELEFUNKEN Semiconductors
1 (7)
Rev. A1, 28-May-96