U211B2
| Model | U211B2 |
| Description | Phase Control Circuit - General Purpose Feedback |
| PDF file | Total 20 pages (File size: 321K) |
| Chip Manufacturer | TEMIC |
U211B2/ B3
Set speed
voltage
2.2
m
F
10 V
R
31
250 k
W
R
13
47 k
W
R
7
15 k
W
100 nF
2.2
m
F 10 V
/
C
10
R
6
C
6
680 pF
C
4
220 nF
C
7
C
5
100 k
W
220 nF
1 M
W
13
U211B2
6
2.2
m
F
10 V
4.7
m
F
10 V
14
15
C
9
4
5
17
2
GND –V
S
16
2.2
m
F
C
11
3
R
2
1 M
W
R
9
470 k
W
R
14
10 k
W
220 k
W
18 k
W
1.5 W
R
4
470 k
W
R
3
180
W
18
1
R
12
C
2
2.2 nF C
12
C
8
C
3
7
R
ö
ö
/t
33 k
W
R
15
T2
D
1
1N4004
R
1
T1
C
1
230 V~
N
R
8
= 3 x 11 m
W
1W
47 k
W
R
16
BZX55
95 10366
Figure 24. Speed control, automatic retriggering, load switch-off, soft-start
The maximum load regulation shows the principle in the
same speed dependency as the original version (see
figure 2). When reaching the maximum load, the control
unit is turned to
a
max
, adjustable with R
2
. Then only I
O
flows. This function is effected by the thyristor, formed
by T
1
and T
2
which ignites as soon as the voltage at Pin 15
reaches ca. 6.8 V (Reference point Pin 16). The potential
L
R
10
2.2 k
W
at Pin 15 is lifted and kept by R
14
over the internally
operating threshold whereby the maximum load
regulation starts and adjusts the control unit constantly to
a
max
(I
O
), inspite of a reduced load current. The motor
shows that the circuit is still in operation by a quiet
buzzing noise.
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96
M
22
m
F
25 V
Speed sensor
10
9
R
11
11
8
R
5
1 k
W
15 (20)
