U6049B Datasheet, PDF (2/8 Pages) TEMIC Semiconductors – Radiator Fan Controlled Timer

U6049B
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 Program Programming input
6
OSC RC oscillator input
7
V_stab Stabilized voltage
8
V_S Supply voltage
GND 1
8 _VS
Output 2
Ignition 3
U6049B
7 V_stab
6 _OSC
S_{th 4}
5 Program
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Functional Description
Power Supply, Pin 8
For reasons of interference protection and surge immu-
nity, 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.
Figure 2. Pinning
The integrated Z-diode (14 V) protects the supply volt-
age,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 4, 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
U6049B
1
2
3
4
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C₂
R₂
8
7
6
5
U6049B
1
2
3
4
13312
Figure 3. Basic circuit for 12 V voltage supply and oscillator
Figure 4. Basic circuit for V_S = 5 V
2 (8)
TELEFUNKEN Semiconductors
Rev. A3, 04-Feb-97