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| U6032B Automotive Toggle Switch Description The bipolar integrated circuit U6032B is designed as a toggle switch. It controls an electrical load, for example, fog lamp, high/ low beam or heated windows for automotive applications. It has a defined power-on status. Features D D D D Debounce time: 0.3 ms to 6 s RC oscillator determines switching characteristics Relay driver with Z diode Debounced input for toggle switch D D D D Three debounced inputs: ON, OFF and TOGGLE Load-dump protection RF interference protected Protection according to ISO/TR7637-1 (VDE 0839) Ordering Information Extended Type Number U6032B U6032B-FP Package DIP8 SO8 Remarks Block Diagram 47 mF Vstab 7 VS C2 R2 6 C1 R1 510 W VBatt OSC 8 Oscillator Stabilization Power-on reset Load-dump detection 1 GND Frequency divider 3 ON 4 OFF 5 TOGGLE 94 8925 2 Debouncing Relay-control output Figure 1. Block diagram with external circuit Rev. A2: 07-Jun-99 1 (8) U6032B Pin Configuration Pin 1 2 3 4 5 6 7 8 Symbol GND RELAY ON OFF TOGGLE OSC Vstab VS Function Reference point, ground Relay control output Switch-on input Switch-off input Toggle input RC oscillator input Stabilized voltage Supply voltage GND RELAY 1 8 VS Vstab OSC TOGGLE 94 8844 2 7 ON OFF 3 6 4 5 Figure 2. Pinning 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 3. The dropping resistor, R1, limits the current in case of overvoltage, whereas C1 smoothes the supply voltage at Pin 8. Recommended values are: R1 = 510 W, C1 = 47 mF. An integrated Z diode (14 V) protects the supply voltage, VS, thus enabling stable operation in a supply-voltage range of 6 V to 16 V, supplied by VBatt. It is possible to operate the integrated circuit with a 5-V supply, but it should be assured that there are no interference voltages. In this case, Pin 7 is connected to Pin 8 as shown in figure 4, and the R1C1 circuit is omitted. VBatt R1 C1 47 mF/ 16 V 510 W R2 C2 VS = 5 V R2 C2 8 7 6 5 VBatt 8 7 6 5 U6032B U6032B 1 2 3 4 1 2 3 4 13309 13310 Figure 3. Basic circuit for 12-V supply and oscillator Figure 4. Basic circuit for VS = 5 V 2 (8) Rev. A2: 07-Jun-99 U6032B Oscillator, Pin 6 The oscillator frequency, f, is determined mainly by the R2C2-circuit. The resistance, R2, determines the charge time, and the integrated resistance (2 kW) is responsible for the discharge time. For the stability of the oscillator frequency, it is recommended that the selected R2 value is remarkably greater than the internal resistance (2 kW), as the temperature response and the tolerances of the integrated resistance are considerably greater than the external resistance value. The oscillator frequency, f, is calculated as follows: f 1 +t )t 1 2 tor is dimensioned so that it can withstand the generated current. 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 output is disabled. Relay-Control Output Behavior, Pin 2 Time functions (relay output) can be started or interrupted by the three inputs ON, OFF or TOGGLE (Pins 3, 4 and 5, input circuit of these pins see figure 6). The relay becomes active if the time function is triggered, and the relay contact is interrupted after the elapse of the delay time, td. There are two input possibilities. a1 and a2 are constants, e.g.: a1 = 0.833 and a2 = 1.551 when C2 = 470 pF to 10 nF a1 = 0.746 and a2 = 1.284 when C2 = 10 nF to 4700 nF The debounce time, t3, depends on the oscillator frequency, f, as follows: t3 where t1 = charge time = a1 t2 = discharge time = a2 R2 2 kW C2 C2 Toggle Input, Pin 5 When the push-button (TOGGLE) switch, S1, is pressed for the first time, the relay becomes active after the debounce time, t3, i.e., the relay output, Pin 2, is active. Repeated operation of S1 causes the interruption of the relay contact, thus disabling the relay. Each operation of the toggle switch, S1, changes (alters) the condition of the relay output when the debounce time, td, is exceeded, i.e., the TOGGLE function. If the relay output is not disabled by pressing the switch S1, the output stays active. VBatt R1 C1 47 mF/ 16 V 8 510 W C2 R2 S1 20 kW 6 5 +6 1 f Table 1 shows the relationship between t3, C2, R2 and frequencies from 1 Hz to 20 kHz. Relay-Control Output The relay-control output is an open-collector Darlington circuit with an integrated 23-V Z diode for limiting 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. 7 Interference Voltages and Load Dump The lC 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 6). 1 U 6032 B 2 3 4 94 8926 The relay-control output is protected via the integrated 23-V Z diode in case of short interference peaks. It is switched to conductive condition for a battery voltage greater than 40 V in case of load dump. The output transis- Figure 5. TOGGLE function Rev. A2: 07-Jun-99 3 (8) U6032B ON, OFF Inputs, Pins 3 and 4 To avoid simultaneous operation of both inputs, Pin 3 (ON) and Pin 4 (OFF), the use of a two-way contact with centre-off position with spring returns (also known as rocker-actuated switch) is recommended. Pressing the push-button switch (Pin 3 ON) leads to an activation of the relay after the debounce time, t3, has ellapsed whereas the switching of Pin 4 switch correspondingly leads to the de-energization of the relay. If the relay is not de-energized by the push-button switch, the output remains active. Combined operation "TOGGLE and ON/OFF" is not possible due to the fact that there is only one debouncing circuit. Debouncing is possible in both modes, i.e., whenever S1 is ON or OFF. Figure 6 shows the input circuit of U6032B. It has an integrated pull-down resistor (20 kW), RF capacitor (15 pF) and Z-diode (7 V). It reacts to voltages greater than 2 V. The external protective resistor has a value of 20 kW and the push-button switch, S, is connected to the battery as shown in the diagram. The contact current, I, is calculated as follows: I I V -V + R(+ 20 kW) Batt Z VBatt R1 C1 47 mF/ 16 V 8 S3 510 W R2 C2 20 kW 20 kW 7 6 5 U 6032 B 1 2 3 4 94 8927 Figure 7. ON/OFF function where V Batt + 12 V, VZ +7 V VBatt 2 mA 5.6 kW 5.6 kW + (12-7) V 20 kW [ 0.25 mA 8 7 6 5 20 kW 20 kW It can be increased by connecting a 5.6-kW resistor from the push-button switch to ground as shown in figure 8. U 6032 B 1 2 3 4 2V VBatt S R 20 kW 7V 15 pF 94 8756 Pin 3,4,5 - + 94 8928 20 kW Figure 8. Increasing the contact current by parallel resistors Figure 6. Input circuit 4 (8) Rev. A2: 07-Jun-99 U6032B Absolute Maximum Ratings Parameters Operating voltage, static, 5 minutes Ambient temperature range Storage temperature range Junction temperature Symbol VBatt Tamb Tstg Tj Value 24 -40 to +125 -55 to +125 150 Unit V C C C Thermal Resistance Parameters Junction ambient DIP8 SO8 Symbol TthJA TthJA Maximum 110 160 Unit K/W K/W Electrical Characteristics VBatt =13.5 V, Tamb = 25C, reference point ground, figure 1, unless otherwise specified Parameters Operating voltage R1 5-V supply Stabilized voltage Undervoltage threshold Supply current Internal Z diode Relay control output Saturation voltage Leakage current Output current Output pulse current Load-dump pulse Internal Z diode Oscillator input Internal discharge resistance Switching thresholds t < 5 min t < 60 min Without R1, C1 figure 2b Pins 7 and 8 VBatt = 12 V Pin 7 Power-on reset All push buttons open, Pin 8 I8 = 10 mA Pin 8 Pin 2 I2 = 200 mA I2 = 300 mA V2 = 14 V w 510 W Test Conditions / Pin Symbol VBatt Min 6 Typ V8, V7 V7 VS IS VZ V2 Ilkg I2 4.3 5.0 3.0 5.2 1.3 13.5 14 1.2 2 Max 16 24 18 6.0 5.4 4.2 2.0 16 Unit V V V V mA V V 1.5 100 300 1.5 24 2.4 1.4 3.5 1 7 mA mA A V kW V I2 t 300 ms I2 = 10 mA VZ f = 0.001 to 40 kHz, see table 1 Pin 6 V6 = 5 V R6 Lower Upper V6 = 0 V V6L V6H -I 6 t3 V3,4,5 V3,4,5 R3,4,5 v 20 1.6 0.9 2.8 22 2.0 1.1 3.1 Input current Switching times Debounce time Inputs ON, OFF, TOGGLE Pins 3, 4 and 5 Switching threshold voltage Internal Z-diode I3, 4, 5 = 10 mA Pull-down resistance V3,4,5 = 5 V mA Cycles V V kW 5 1.6 6.5 13 2.0 7.1 20 2.4 8.0 50 Rev. A2: 07-Jun-99 5 (8) U6032B Table 1. Values for C2 and R2 for a given oscillator frequency and debounce time Frequency f Hz 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 Debounce Time t3 ms 6000 3000 2000 1500 1200 1000 857 750 667 600 300 200 150 120 100 86 75 67 60 30 20 15 12 10 C2 R2 Frequency f Hz 700 800 900 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 20000 nF 4700 1000 1000 1000 1000 1000 1000 1000 1000 1000 100 100 100 100 100 100 100 100 100 10 10 10 10 10 kW 280 650 440 330 260 220 190 160 140 130 650 440 330 260 220 190 160 140 130 600 400 300 240 200 Debounce Time t3 ms 9.00 8.00 7.00 6.00 3.00 2.00 1.50 1.20 1.00 0.86 0.75 0.67 0.60 0.55 0.50 0.46 0.43 0.40 0.38 0.35 0.33 0.32 0.30 C2 R2 nF 10 10 10 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 kW 170 150 130 120 600 400 300 240 200 170 150 130 120 110 99 91 85 79 74 70 66 62 59 6 (8) Rev. A2: 07-Jun-99 U6032B Package Information Package DIP8 Dimensions in mm 9.8 9.5 1.64 1.44 7.77 7.47 4.8 max 6.4 max 0.5 min 0.58 0.48 7.62 8 5 2.54 3.3 0.36 max 9.8 8.2 technical drawings according to DIN specifications 13021 1 4 Package SO8 Dimensions in mm 5.00 4.85 1.4 0.4 1.27 3.81 8 5 0.25 0.10 0.2 3.8 6.15 5.85 5.2 4.8 3.7 technical drawings according to DIN specifications 13034 1 4 Rev. A2: 07-Jun-99 7 (8) U6032B Ozone Depleting Substances Policy Statement It is the policy of TEMIC Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so 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 Semiconductors products for any unintended or unauthorized application, the buyer shall indemnify TEMIC Semiconductors 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 Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423 8 (8) Rev. A2: 07-Jun-99 |
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