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U2008B Datasheet

Low Cost Current Feedback Phase Control Circuit

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U2008B
Low Cost Current Feedback Phase Control Circuit
Description
The U2008B is designed as a phase control circuit in
bipolar technology. It enables load-current detection as
well as mains-compensated phase control. Motor control
with load-current feedback and overload protection are
preferred applications.
Features
D Full wave current sensing
D Mains supply variation compensated
D Variable soft-start or load-current sensing
D Voltage and current synchronization
D Automatic retriggering switchable
D Triggering pulse typ. 125 mA
D Internal supply-voltage monitoring
vD Current requirement 3 mA
Applications
D Low cost motor control
D Domestic appliance
Package: DIP8, SO8
Block Diagram
230 V ~
Load
22 kW/2W
BYT51K
R2
330 kW
aR1 D1
max
R8
1 MW
76
96 11643
Limiting
detector
Voltage
detector
Mains voltage
compensation
Automatic
retriggering
TIC
226
R3
180W
8
1
Current
detector
Full wave load
current detector
Soft start
R6
^
V(R6)
=
±250
mV
Phase
control unit
ö = f (V3)
23
C3
3.3 nF
C4
100 nF
+–
Supply
voltage
limiting
Reference
voltage
Voltage
monitoring
WR10 100 k
Load current
compensation
5 –VS
C1
22 mF/
25 V
4 GND
R14
47 kW
Set point
R7
12 kW
P1
50 kW
Figure 1. Block diagram with typical circuit: Load current sensing
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
1 (10)
TEMIC Semiconductors
TEMIC Semiconductors



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