U6044B Datasheet, PDF (2/7 Pages) TEMIC Semiconductors – Radiator fan controlled timer

U 6044 B
Pin Configuration
Pin Symbol
Function
1
GND Reference point, ground
2
Output Relay control output
3 Ignition Signal input, ignition
4
S_th Thermal switch, input
5
AC Air condition input
6
OSC RC oscillator input
7
V_stab Stabilized voltage
8
V_S Supply voltage
TELEFUNKEN Semiconductors
GND 1
Output 2
Ignition 3
S_{th 4}
8 _VS
7 V_stab
6 _OSC
5 Air condition
94 9233
Functional description
Power supply, Pin 8
For reasons of interference protection and surge immunity,
the supply voltage (Pin 8) must be provided with an
RC circuit as shown in figure 2a. Dropper resistor, R₁,
limits the current in case of overvoltage, whereas C₁
smoothes the supply voltage at Pin 8.
W m Recommended values are: R₁ = 510 , C₁ = 47 F.
m In case of figure 1, capacitor, C₁, has a value of 10 F,
because a diode is connected between V_Batt and resistance,
R₁.
The integrated Z-diode (14 V) protects the supply
voltage,V_S, therefore, the operation of the IC is possible
between 6 V and 16 V, supplied by V_Batt.
However, it is possible to operate the integrated circuit with
a 5 V supply, but it should be free of interference voltages.
In this case, Pin 7 is connected to Pin 8 as shown in
figure 2b, and the R₁C₁ circuit is omitted.
V_Batt
R₁ ^{510 W}
C₂
C₁
R₂
47 mF/
16 V ₈
7
6
5
V_S = 5 V
V_Batt
C₂
R₂
8
7
6
5
1
2
3
4
94 8749
Figure 2a Basic circuit for 12 V voltage supply and
oscillator
2
1
2
3
4
94 8750
Figure 2b Basic circuit for V_S = 5 V
Rev. A1: 12.12.1994