U2008B Datasheet, PDF (1/10 Pages) TEMIC Semiconductors – Low Cost Current Feedback Phase Control Circuit

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
v D 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
a R1 D1
max
R₈
1 MW
7
6
96 11643
Limiting
detector
Voltage
detector
Mains voltage
compensation
Automatic
retriggering
TIC
226
R₃
8
180W
1
Current
detector
Full wave load
current detector
Soft start
R₆
^
V_(R6)
=
±250
mV
Phase
control unit
ö = f (V₃)
2
3
C₃
3.3 nF
C₄
100 nF
+–
Supply
voltage
limiting
Reference
voltage
Voltage
monitoring
W ^R10 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)