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PDF U6043B-FP Data sheet ( Hoja de datos )
| Número de pieza | U6043B-FP | |
| Descripción | FLASHER IC | |
| Fabricantes | ATMEL Corporation | |
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Features
• Temperature and Supply Voltage Compensated Flashing Frequency
• Frequency Doubling Indicates Lamp Outage
• Relay Driver Output with High Current Carrying Capacity and Low Saturation Voltage
• Minimum Lamp Load for Flasher Operation: ≥ 1 W
• Very Low Susceptibility to EMI
• Protection According to ISO/TR 7637/1 Level 4
1. Description
The bipolar integrated circuit U6043B is used in relay-controlled automotive flashers
where a high level EMC is required.
Lamp outage is indicated by frequency doubling during hazard warning as well as
direction mode.
Flasher IC with
18-mΩ Shunt
U6043B
4726C–AUTO–02/10
1 page  
U6043B
Comparator K1’s reference voltage is matched to the characteristics of filament lamps (see
“Control Signal Threshold” in the data part).
The combination of shunt resistor and resistance of wire harness prevents pin 7 from a too high
voltage in case of shorted lamps.
4.7 Pin 8, Start Input
Start condition for flashing: the voltage at pin 8 has to be below the K3 threshold (flasher switch
closed).
Humidity and dirt may decrease the resistance between 49 a and GND. If this leakage resis-
tance is > 5 kΩ, the IC is still kept in the off-condition. In this case the voltage at pin 8 is between
the thresholds of comparators K2 and K3.
During the bright phase the voltage at pin 8 is above the K2 threshold, during the dark phase it is
below the K3 threshold. For proper start conditions a minimum lamp wattage of 1W is required.
4726C–AUTO–02/10
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet U6043B-FP.PDF ] | |
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