U6044B TEMIC | Alldatasheet
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Technical content
Features
/C0068Delay time range: 4 s to 20 h /C0068Cool-off time starts when thermal switch is closed /C0068RC oscillator determines switching characteristics /C0068Relay driver with Z-diode /C0068Debounced input for coolant temperature switch /C0068Not debounced input for ignition key (Terminal 15) /C0068Low standby current /C0068Load dump protection /C0068RF interference protected /C0068Protection according to ISO/TR 7637-1 (VDE 0839) Cases: DIP 8, SO 8 Stabilization Power-on reset Load dump detection Debouncing Monoflop Oscillator Frequency divider GND 94 9232 Relay control outputLogic OSC V SV stab6 7 8 R 2 C 2 R 1 C 1 510 /C0087 V Batt 10 /C0109F Thermal switch 4 Air condition5 Ignition3 300 k/C0087 R 5R 4 C 3 100 nF R 3 20 k/C0087 Terminal 15 300 k/C0087 R 6 1 k/C0087 R 71 k/C0087 x x C 4 100 nF Figure 1 Block diagram with external circuit
TELEFUNKEN SemiconductorsU 6044 B 2 Rev. A1: 12.12.1994 Pin Configuration Pin Symbol Function
1 GND Reference point, ground
2 Output Relay control output
3 Ignition Signal input, ignition
4 Sth Thermal switch, input
5 AC Air condition input
6 OSC RC oscillator input
7 V stab Stabilized voltage
8 V S Supply voltage
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, R limits the current in case of overvoltage, whereas C1 smoothes the supply voltage at Pin 8. Recommended values are: R1 = 510 /C0087, C1 = 47 /C0109F. In case of figure 1, capacitor, C1, has a value of 10 /C0109F, because a diode is connected between VBatt and resistance, R 1. The integrated Z-diode (14 V) protects the supply voltage,VS, therefore, the operation of the IC is possible between 6 V and 16 V , supplied by VBatt. 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 R 1C 1 circuit is omitted. 47 /C0109F/ 16 V C 1 R 1 510 /C0087 R 2 C 2 V Batt 1 2 6 58 7 3 4 94 8749 Figure 2a Basic circuit for 12 V voltage supply and oscillator R 2 C 2 V Batt 1 2 6 58 7 3 4 94 8750 V S = 5 V Figure 2b Basic circuit for VS = 5 V
TELEFUNKEN Semiconductors U 6044 B 3Rev. A1: 12.12.1994 Oscillator, Pin 6 Oscillator frequency, f, is determined mainly by R 2C 2-circuit. Resistance, R2, determines the charge time, whereas the integrated resistance (2 k/C0087) is responsible for discharge time. For the stability of the oscillator frequency, it is recommended to select R 2 much greater than internal resistance (2 k/C0087), because the temperature response and the tolerances of the integrated resistance are considerably greater than the external resistance value. Oscillator frequency, f, is calculated as follows: f/C00431 t 1 /C0041t2 where t1 = charge time = /C00971/C0064R 2/C0064C 2 t2 = discharge time = /C00972/C00642 k/C0087/C0064C 2 /C00971 and /C00972 are constants and has /C00971 = 0.833 and /C00972 = 1.551 when C2 = 470 pF to 10 nF /C00971 = 0.746 and /C00972 = 1.284 when C2 = 10 nF to 4700 nF Debounce time, t3, and the delay time, td, depend on the oscillator frequency, f, as follows: t3 /C00436 /C00641 f td /C004373728 /C00641 f Table 1 shows relationships between t3, td, C2, R2 and frequencies from 1 Hz to 20 kHz. Output, Pin 2 Output Pin 2 is an open collector Darlington circuit with integrated 23-V Z-diode for limitation of the inductive cut–off pulse of the relay coil. The maximum static collector current must not exceed 300 mA and the saturation voltage is typically 1.1 V @ 200 mA. The output stage can be activated /C0068directly with the AC input independent of the ignition input and S th input /C0068during the delay time which is started by the ignition input with the Sth input Interference voltages and load dump The IC supply is protected by R1, C1, and an integrated Z-diode, while the inputs are protected by a series resistor, integrated Z-diode and RF-capacitor (refer to Figure 3). The relay control output is protected via the integrated 23-V Z-diode in the case of short interference peaks. It is switched to conductive condition for a battery voltage of greater than approx. 40 V in the case of load dump. The output transistor is dimensioned so that it can withstand the current produced. Power-on reset When the operating voltage is switched on, an internal power-on reset pulse (POR) is generated which sets the logic of the circuits to a defined initial condition. The relay control output is disabled. Input stages 7 V 15 pF 20 k/C0087
2 VPin 320 k/C0087
Figure 3a Input circuit for ignition (Pin 3) V S (Pin 8) 15 pF Pin 4, 5 94 8815 Figure 3b Input circuit Pin 4 and Pin 5 Figure 3a shows the internal input circuit of ignition (Pin 3). It has an integrated pull-down resistor (20 k/C0087/C0041/C0044 RF-capacitor (15 pF) and 7-V Z-diode. It reacts to voltages greater than 2 V . The thermal switch input, S th, is internally debounced and only needs an external protection resistor. The air conditioning input, AC, and the signal input, ignition, are not debounced and external R/C filters are recommended to prevent the integrated circuit from unintentional activation by transients. The ignition input is switched to V Batt, the Sth and AC inputs are switched to GND and need pull up resistors externally (figure 3b). The detection threshold voltage of all three input stages is typically 2 V . Ignition input (terminal 15) is not debounced. Debouncing can be achieved by external circuit (R 3,C3) connected to Pin 3 (see figures 1 and 5).
TELEFUNKEN Semiconductors U 6044 B 5Rev. A1: 12.12.1994 Absolute Maximum Ratings Parameters Symbol Value Unit Operating voltage t = 1 min t = 60 min V Batt 24 V Ambient temperature range Tamb –40 to +125 °C Storage temperature range Tstg –55 to +125 °C Junction temperature Tj 150 °C Thermal Resistance Parameters Symbol Maximum Unit Junction ambient DIP 8 SO 8 R thJA R thJA 110 160 K/W K/W
Electrical Characteristics
V Batt =13.5 V , Tamb = 25°C, reference point ground, figure 2, unless otherwise specified Parameters Test Conditions / Pin Symbol Min Typ Max Unit Operating voltage R 1 /C0119 510 /C0087 t = 1 min t = 60 min V Batt 6 16 V
5 V supply Without R1, C1
V 8, V7 4.3 6.0 V Stabilized voltage Pin 7V 7 5.0 5.2 5.4 V Undervoltage threshold Power on reset V S 2.4 4.2 V Supply current Push-buttons open Pin 8 IS 1.0 mA Internal Z-diode I8 = 10 mA Pin 8 V Z 13.5 14 16 V Relay output Pin 2 Saturation voltage I2 = 200 mA I2 = 300 mA V 2 1.2 1.5 V Leakage current V 2 = 14 V Ilkg 2 100 /C0109A Output current I2 300 mA Output pulse current Load dump pulse I2 1.5 A Internal Z-diode I2 = 10 mA V 2 20 23 24 V Oscillator input f = 0.001 to 40 kHz, see table 1 Pin 6 Internal discharge resistance R 6 1.6 2.0 2.4 k/C0087 Switching voltage Lower Upper V 6L V 6H 0.9 2.8 1.1 3.1 1.4 3.5 V Input current V 6 = 0 V –I6 1 /C0109A Switching times Debounce time t3 5 7 cycles Delay time cooling off period td 72704 74752 cycles Inputs Pin 3, 4, 5 Switching threshold V 3,4,5 1.6 2.0 2.4 V Ignition input Pin 3 Pull-down resistance Switched to VBatt (15) R 3 13 20 50 k/C0087 Protective diode I3 = 10 mA V 3 6.5 7.1 8.0 V Thermal switch Pin 4 Input current V 4 = 0 V – I4 2 /C0109A Air condition input Pin 5 Input current V 5 = 0 V – I5 2 /C0109A
TELEFUNKEN SemiconductorsU 6044 B 6 Rev. A1: 12.12.1994 Table 1 Oscillator frequency, debounce and delay time dimensioning Fre- quency f De- bounce time Delay time td C 2 R 2 Hz ms min s nF k/C0087 1 6000 1229 4700 280 2 3000 614 1000 650 3 2000 410 1000 440 4 1500 307 1000 330 5 1200 246 1000 260 6 1000 205 1000 220 7 857 176 1000 190 8 750 154 1000 160 9 667 137 1000 140 10 600 123 1000 130 20 300 61 100 650 30 200 41 100 440 40 150 31 100 330 50 120 25 100 260 60 100 20 100 220 70 86 18 100 190 80 75 15 100 160 90 67 14 100 140 100 60 12 100 130 200 30 369 10 600 300 20 246 10 400 400 15 184 10 300 500 12 147 10 240 Fre- quency f De- bounce time Delay time td C 2 R 2 Hz ms min s nF k/C0087 600 10 123 10 200 700 9 105 10 170 800 8 92 10 150 900 7 82 10 130 1000 6 74 10 120 2000 3.00 37 1 600 3000 2.00 25 1 400 4000 1.50 18 1 300 5000 1.20 15 1 240 6000 1.00 12 1 200 7000 .86 11 1 170 8000 .75 9 1 150 9000 .67 8 1 130 10000 .60 7 1 120 11000 .55 6.7 1 110 12000 .50 6.1 1 99 13000 .46 5.7 1 91 14000 .43 5.3 1 85 15000 .40 4.9 1 79 16000 .38 4.6 1 74 17000 .35 4.3 1 70 18000 .33 4.1 1 66 19000 .32 3.9 1 62 20000 .30 3.7 1 59
TELEFUNKEN Semiconductors U 6044 B 7Rev. A1: 12.12.1994 Dimensions in mm Package: DIP 8 94 8873 Package: SO 8 94 8862 We reserve the right to make changes to improve technical design without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2831, Fax Number: 49 (0)7131 67 2423