U490B Datasheet, PDF (1/6 Pages) TEMIC Semiconductors – One-Shot Phase Control

One-Shot Phase Control
U490B
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 Phase controlled thyristor ignition
D Triggering with time delay
D Repetition time delay
x D Supply current 2 mA
D Mains supply via resistor
Applications
D Electric stapler devices
Package: DIP8, SO8
L
X ^Vmains
230 V
C₁
47 mF/
10 V
N
D₁
1N4007
R₁
R₃
24 kW/
2W
220 kW
C₃
1.5 nF
8 V_S
3
4
Supply
GND ^stage
Sync.
Start
delay
Repetition
delay
Phase control
POR
Control
input
Ramp
5
6
S₁
95 10866
Trigger
control
2
C₂
47 nF
R₂
220 kW
Load
7
Output
stage
R₇
33 W
C₇
22 nF
C₅
150 nF
[ ^R5
68 kW
47 kW
C₆
150 nF
D₂
R₄
220 W
C₄
X ^{47 nF/}
250 V
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
1 (6)
Rev. A1, 29-May-96