U2043B Datasheet, PDF (1/6 Pages) TEMIC Semiconductors – Flasher, 30-mohm Shunt, Pilot Lamp to GND or V Batt

U2043B
W Flasher, 30-m 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
w D Minimum lamp load for flasher operation 10 W
D Relay output with high current carrying capacity and
low saturation voltage
D Low susceptibility to EMI
Ordering Information
Extended Type Number
U2043B
U2043B–FP
Package
DIP8
SO8
Remarks
Block Diagram
C₁
4
6
Measuring comparator
K₁ ^V₆^{–81 mV}
2
7
W ^R3 30 m
Shunt
+ V_S
+ 49
Pilot lamp 5 W
Pulse
R₁
generator
3.8 k W
5
K_{3 V6–5 V}
49 a–Comparator
3
Relay
8
R₂
3.3 k W
23 V
1
R₁
IC Ground
100 W
13283
GND
– 31
Figure 1.
49 a
5 W 21 W 21 W 21 W 21 W 5 W
Indicator lamps
Pilot lamps
TELEFUNKEN Semiconductors
1 (6)
Rev. A2, 25-Feb-97