U490B
| Model | U490B |
| Description | One-Shot Phase Control |
| PDF file | Total 6 pages (File size: 86K) |
| Chip Manufacturer | TEMIC |
U490B
One-Shot Phase Control
Description
The monolithic integrated bipolar circuit, U490B, is a
one-shot power control circuit, designed to control the
thyristor which is mainly used in electric stapler devices.
The IC is preferred to realise a one-shot phase control,
where any phase angle and thus any intensity of the load
voltage is adjustable.
After successful triggering and the following delay time,
an ignition pulse at the output is released. A further trig-
gering is only possible after the elapse of the delay time.
Features
D
D
D
D
D
L
D
1
1N4007
R
1
V
mains
230 V
24 k
W/
2W
R
3
220 k
W
C
3
1.5 nF
Applications
D
Electric stapler devices
Phase controlled thyristor ignition
Triggering with time delay
Repetition time delay
Supply current
x
2 mA
Package:
DIP8, SO8
Mains supply via resistor
S
1
X
C
1
47
m
F/
10 V
8
V
S
3
4
GND
95 10866
Start
delay
Supply
stage
Sync.
Repetition
delay
Trigger
control
2
C
2
47 nF
R
2
220 k
W
N
Load
D
2
Phase control
POR
Control
input
5
R
5
W
7
Output
stage
R
7
33
W
C
7
22 nF
Ramp
6
R
4
220
W
C
4
47 nF/
250 V
X
C
5
150 nF
[
68 k
47 k
W
C
6
150 nF
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96
1 (6)
