U2044B Datasheet, PDF (5/8 Pages) TEMIC Semiconductors – Dual Output Flasher

U2044B
Supply Voltage (Pin 9)
GND (Pin 10)
Control Output Relay 1
and 2 (Pin 11 and 13)
Supply Voltage Power
(Pin 12)
The combination of the shunt resistor and the resistance of the wire harness prevents
pin 8 from a too high voltage in the case of shorted lamps.
This pin supplies the oscillator, the comparators and the logic parts of the IC.
The integrated circuit is protected against transients according to ISO-TR 7637-3 level 3
via resistor R₂ to ground (-31). An integrated protection circuit together with external
resistors R_2, R_3, R_4, R_6, R₈ and R₉ limits the current pulses in the IC. The IC is also pro-
tected against reversed battery.
The relay control outputs are high-side drivers with a low saturation voltage and capable
of driving a typical automotive relay with a coil resistance of 60 W.
This pin supplies the relay drivers connected directly to the battery (Kl 30). It is internally
clamped by a 27-V Z-diode.
Absolute Maximum Ratings
Reference point pin 1
Parameters
Symbol
Value
Unit
Supply voltage, 1 min, pins 5, 9 and 12
V_S
24
V
Junction temperature
T_j
150
°C
Ambient temperature range
T_amb
-40 to +100
°C
Storage temperature range
T_stg
-55 to +150
°C
Thermal Resistance
Parameters
Junction ambient, DIP14
Junction ambient, SO14
Symbol
R_thJA
R_thJA
Value
90
120
Unit
K/W
K/W
Electrical Characteristics
Typical values under normal operation in application circuit Figure 1, V_S (+30) = 12 V.
Reference point ground (-31), T_amb = 25°C, unless otherwise specified
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Supply current, switches open
Output current for relay driver
Saturation voltage
Relay output reverse current
Relay coil resistance
Start delay
Pins 5, 9, 12
Pins 5, 9, 12
Pins 11, 13
R_L = 82 W
V_S = 8 V
V_S = 12 V
Pin 11, 13
First bright phase
V_S
8
I_S
I_O
V_O
I_O
R_L
60
t_on
18
V
10
µA
300
mA
1.0
V
1.2
V
0.1
mA
W
10
ms
5
4721A–AUTO–05/03