U6043B
3. Pin Configuration
Figure 3-1.
Pinning
GND
1
2
8
7
SI
VS
REL
OSC
LD
VS
OSC
U6043B
3
4
6
5
Table 3-1.
Pin
1
2
3
4
5
6
7
8
Pin Description
Symbol
GND
VS
REL
OSC
OSC
VS
LD
SI
Function
IC ground
Supply voltage
Relay driver
Oscillator
Oscillator
Supply voltage, Sense
Lamp outage detection
Start input (49a)
4. Functional Description
4.1
Pin 1, GND
The U6043B is protected against damage in case of battery reversal via resistor R
4
to ground
(-31). An integrated protection circuit together with external resistances R
2
and R
4
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
ATMEL [ ATMEL CORPORATION ]
