U2043B
Flasher, 30-m
W
Shunt, Pilot Lamp to GND or V
Batt
Description
The integrated circuit U2043B is used in relay controlled
automotive flashers where a high EMC level is required.
A lamp outage is indicated by frequency doubling during
hazard mode as well as direction mode. Pilot lamp can be
connected either to V
Batt
or GND.
Features
D
Temperature and voltage compensated frequency
D
Warning indication of lamp failure by means of
frequency doubling
D
Relay output with high current carrying capacity and
low saturation voltage
D
Minimum lamp load for flasher operation
w
10 W
Package
DIP8
SO8
D
Low susceptibility to EMI
Ordering Information
Extended Type Number
U2043B
U2043B–FP
Remarks
Block Diagram
+ V
S
+ 49
6
C
1
Measuring comparator
4
K
1
V
6
–81 mV
7
Pilot lamp
Pulse
generator
3.8 k
W
8
K
3
V –5 V
6
49 a–Comparator
23 V
1
IC Ground
13283
2
R
3
Shunt
30 m
W
5W
R
1
3
Relay
R
2
3.3 k
W
49 a
5
R
1
100
W
GND
– 31
5 W 21 W 21 W
21 W 21 W 5 W
Indicator lamps
Pilot lamps
Figure 1.
TELEFUNKEN Semiconductors
Rev. A2, 25-Feb-97
1 (6)
TEMIC [ TEMIC SEMICONDUCTORS ]
