器件名称: U2043B
功能描述: Flasher, 30-mohm Shunt, Pilot Lamp to GND or V Batt
文件大小: 132.54KB 共6页
简 介:U2043B
Flasher, 30-mW Shunt, Pilot Lamp to GND or VBatt
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 VBatt 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
+ VS + 49 6 C1 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 R3 Shunt 30 m W
5W
R1
3 Relay R2 3.3 k W 49 a
5
R1 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)
U2043B
Pin Description
Pin 1 2 3 4 5 6 7 8 Symbol GND VS REL OSC OSC VS LD SI Function IC ground Supply voltage VS Relay driver C1 oscillator R1 oscillator Supply voltage VS Lamp failure detection Start input (49a) GND Vs REL OSC 1 2 8 7 SI LD Vs OSC
12749
U2043B
3 4 6 5
Figure 2. Pinning
Functional Description
Pin 1, GND The integrated circuit is protected against damage via resistor R4 to ground (–31) in the case of battery reversal. An……