U6043B_05 Datasheet, PDF (3/8 Pages) ATMEL Corporation – Flasher IC with 18-mOHM Shunt

3. Pin Configuration
Figure 3-1. Pinning
GND 1
8 SI
VS ²
REL 3
U6043B
7 _LD
6 VS
OSC 4
5 OSC
U6043B
Table 3-1.
Pin
1
2
3
4
5
6
7
8
Pin Description
Symbol Function
GND
IC ground
VS
Supply voltage
REL
Relay driver
OSC
Oscillator
OSC
Oscillator
VS
Supply voltage, Sense
LD
Lamp outage detection
SI
Start input (49a)
4. Functional Description
4.1 Pin 1, GND
The U6043B is protected against damage in case of battery reversal via resistor R₄ to ground
(-31). An integrated protection circuit together with external resistances R₂ and R₄ limits the cur-
rent pulses in the IC.
4.2 Pin 2, Supply Voltage, V_S power
The arrangement of the supply connections to Pin 2 (and 6) must be so as to ensure that on the
connection printed circuit board (PCB), the resistance of V_S to Pin 6 is lower than that to Pin 2.
4.3 Pin 3, Relay Control Output (Driver)
The relay control output is a high-side driver with a low saturation voltage. It is capable of driving
a typical automotive relay with a minimum coil resistance of 60 Ω.
3
4726B–AUTO–11/05