Atmel U6032B Automotive Toggle Switch IC DATASHEET Features Debounce time: 0.3ms to 6s RC oscillator determines switching characteristics Relay driver with Z-diode Debounced input for toggle switch Three debounced inputs: ON, OFF and TOGGLE Load-dump protection RF interference protection Protection according to ISO/TR7637-1 (VDE 0839) Description The bipolar integrated circuit Atmel(R) U6032B is designed as a toggle switch. The device, which has a defined power-on status, can be used to control electrical loads, for example, fog lamps, high/low beam or heated windows for automotive applications. 4771C-AUTO-06/12 Figure 1. Block Diagram with External Circuit C2 OSC 47F R2 6 Oscillator Vstab 7 C1 VS 8 Stabilization Power-on reset Load-dump detection R1 510 VBatt 1 GND Frequency divider 3 ON 2 4 OFF Debouncing Relay-control output 5 TOGGLE Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 2 1. Pin Configuration Figure 1-1. Pinning DIP8 Table 1-1. GND 1 8 VS RELAY 2 7 VSTAB ON 3 6 OSC OFF 4 5 TOGGLE Pin Description Pin Symbol 1 GND 2 RELAY Function Reference point, ground Relay control output 3 ON Switch-on input 4 OFF Switch-off input 5 TOGGLE 6 OSC RC oscillator input 7 VSTAB Stabilized voltage 8 VS Toggle input Supply voltage Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 3 2. Functional Description 2.1 Power Supply, Pin 8 To achieve interference protection and surge immunity, the supply voltage (pin 8) must be provided with an RC circuit as shown in Figure 2-1. The dropping resistor, R1, limits the current in case of overvoltage, whereas C1 smooths the supply voltage at pin 8. Recommended values are: R1 = 510, C1 = 47F. An integrated Z-diode (14V) protects the supply voltage, VS, thus enabling stable operation in a supply-voltage range of 6V to 16V, supplied by VBatt. It is possible to operate the integrated circuit with a 5V 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 2-2 on page 4, and the R1C1 circuit is omitted. Figure 2-1. Basic Circuit for 12-V Supply and Oscillator VBatt 510 R1 C2 C1 47F/ 16V R2 6 7 8 5 U6032B 1 3 2 4 Figure 2-2. Basic Circuit for VS = 5V VS = 5V C2 R2 8 7 6 5 VBatt U6032B 1 2 3 4 Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 4 2.2 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 (2k) is responsible for the discharge time. To ensure the stability of the oscillator frequency, it is recommended that the selected R2 value is remarkably greater than the internal resistance (2k), 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: 1 f = -------------t1 + t2 where t1 = charge time = 1 x R2 x C2 t2 = discharge time = 2 x 2k x C2 1 and 2 are constants, e.g.: 1 = 0.833 and 2 = 1.551 when C2 = 470pF to 10nF 1 = 0.746 and 2 = 1.284 when C2 = 10nF to 4700nF The debounce time, t3, depends on the oscillator frequency, f, as follows: 1 t 3 = 6 x --t Table 5-1 on page 8 shows the relationship between t3, C2, R2 and frequencies from 1Hz to 20kHz. 2.3 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 300mA and the saturation voltage is typically 1.1V at 200 mA. 2.4 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 Zdiode and RF capacitor (refer to Figure 2-4 on page 6). The relay-control output is protected by the integrated 23V Z-diode in case of short interference peaks. It is switched to conductive condition for a battery voltage greater than 40V in case of load dump. The output transistor is dimensioned so that it can withstand the generated current. 2.5 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. 2.6 Relay-control Output Behavior, Pin 2 The 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 2-4 on page 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. Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 5 2.7 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. Figure 2-3. TOGGLE Function VBatt R1 510 47F/ 16V S1 C2 C1 R2 8 7 20k 6 5 U6032B 1 2.8 2 3 4 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 elapsed 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 2-4 shows the input circuit of Atmel(R) U6032B. It has an integrated pull-down resistor (20k), RF capacitor (15pF) and Z-diode (7V). It reacts to voltages greater than 2V. The external protective resistor has a value of 20k and the push-button switch, S, is connected to the battery as shown in the diagram. The contact current, I, is calculated as follows: V Batt - V Z where VBatt = 12V, VZ = 7V I = -------------------------R(= 20k) (12 - 7)V I = ---------------------- 0.25mA 20k It can be increased by connecting a 5.6k resistor from the push-button switch to ground as shown in Figure 2-6 on page 7. Figure 2-4. Input Circuit 2V VBatt S R Pin 3, 4, 5 + 20k 20k 7V 15pF Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 6 Figure 2-5. ON/OFF Function S3 VBatt R1 510 C1 C2 R2 47F/ 16V 8 20k 6 7 20k 5 U6032B 1 2 3 4 Figure 2-6. Increasing the Contact Current by Parallel Resistors VBatt 2mA 5.6k 8 7 6 5.6k 5 20k 20k U 6032B 1 3. 2 3 4 Absolute Maximum Ratings Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Symbol Value Unit Operating voltage, static, 5 minutes VBatt 24 V Ambient temperature range Tamb -40 to +125 C Storage temperature range Tstg -55 to +125 C Tj 150 C Symbol Value Unit TthJA 110 K/W Junction temperature 4. Thermal Resistance Parameters Junction ambient DIP8 Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 7 5. Electrical Characteristics VBatt = 13.5 V, Tamb = 25 C, reference point ground, Figure 1 on page 2, unless otherwise specified Parameters Test Conditions Pin Symbol Min. Operating voltage R1 510 t < 5min t < 60min 5 V supply Without R1, C1 Stabilized voltage VBatt = 12V Undervoltage threshold Power-on reset Supply current All push buttons open 8 IS Internal Z-diode I8 = 10mA 8 VZ VBatt 6 16 24 18 7, 8 V8, V7 4.3 6.0 V 7 V7 5.0 5.4 V VS 3.0 Relay Control Output 13.5 Typ. 5.2 Max. Unit V 4.2 V 1.3 2.0 mA 14 16 V 2 Saturation voltage I2 = 200mA I2 = 300mA V2 Leakage current V2 = 14V Ilkg Output current 1.2 1.5 2 V 100 A I2 300 mA 1.5 A Output Pulse Current Load-dump pulse t 300ms I2 Internal Z-diode I2 = 10mA VZ 20 22 24 V Oscillator Input f = 0.001 to 40kHz, see Table 5-1 Internal discharge resistance V6 = 5V R6 1.6 2.0 2.4 k Switching thresholds Lower Upper V6L V6H 0.9 2.8 1.1 3.1 1.4 3.5 V Input current V6 = 0V -I6 1 A 7 Cycles 6 Switching Times Debounce time Inputs ON, OFF, TOGGLE t3 5 3, 4, 5 Switching threshold voltage V3,4,5 1.6 2.0 2.4 V Internal Z-diode I3,4,5 = 10mA V3,4,5 6.5 7.1 8.0 V Pull-down resistance V3,4,5 = 5V R3,4,5 13 20 50 k Table 5-1. Values for C2 and R2 for a Given Oscillator Frequency and Debounce Time Frequency f (Hz) Debounce Time t3 (ms) C2 (nF) R2 (k) 1 6000 4700 280 2 3000 1000 650 3 2000 1000 440 4 1500 1000 330 5 1200 1000 260 6 1000 1000 220 7 857 1000 190 8 750 1000 160 9 667 1000 140 10 600 1000 130 Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 8 Table 5-1. Values for C2 and R2 for a Given Oscillator Frequency and Debounce Time (Continued) Frequency f (Hz) Debounce Time t3 (ms) C2 (nF) R2 (k) 20 300 100 650 30 200 100 440 40 150 100 330 50 120 100 260 60 100 100 220 70 86 100 190 80 75 100 160 90 67 100 140 100 60 100 130 200 30 10 600 300 20 10 400 400 15 10 300 500 12 10 240 600 10 10 200 700 9.00 10 170 800 8.00 10 150 900 7.00 10 130 1000 6.00 10 120 2000 3.00 1 600 3000 2.00 1 400 4000 1.50 1 300 5000 1.20 1 240 6000 1.00 1 200 7000 0.86 1 170 8000 0.75 1 150 9000 0.67 1 130 10000 0.60 1 120 11000 0.55 1 110 12000 0.50 1 99 13000 0.46 1 91 14000 0.43 1 85 15000 0.40 1 79 16000 0.38 1 74 17000 0.35 1 70 18000 0.33 1 66 19000 0.32 1 62 20000 0.30 1 59 Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 9 Ordering Information Extended Type Number Package U6032B-MY Pb-free Package Information Figure 7-1. DIP8 Package: DIP8 Dimensions in mm 9.8 max. 7.620.15 9.60.1 0.3 B A 3.60.1 1.8 1.20.3 2.5 6.7 7. Remarks DIP8 4.20.3 6. 0.530.05 2.54 nom. 0.4 A 6.30.1 0.36 max. 3 x 2.54 = 7.62 nom. B 8.750.8 1.54 0.65 8 5 technical drawings according to DIN specifications 1 4 Drawing-No.: 6.543-5040.01-4 Issue: 1; 16.01.02 Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 10 8. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. History * Section 4 "Thermal Resistance" on page 7 changed 4771C-AUTO-06/12 * Section 7 "Ordering Information" on page 10 changed * Section 8 "Package Information" on page 10 changed 4771B-AUTO-11/05 * First page: Pb-free logo added * Page 10: Ordering Information changed Atmel U6032B [DATASHEET] 4771C-AUTO-06/12 11 Atmel Corporation 2325 Orchard Parkway Atmel Asia Limited Unit 01-5 & 16, 19F Atmel Munich GmbH Business Campus Atmel Japan G.K. 16F Shin-Osaki Kangyo Building San Jose, CA 95131 BEA Tower, Millennium City 5 Parkring 4 1-6-4 Osaki USA 418 Kwun Tong Roa D-85748 Garching b. Munich Shinagawa-ku, Tokyo 141-0032 Tel: (+1) (408) 441-0311 Kwun Tong, Kowloon GERMANY JAPAN Fax: (+1) (408) 487-2600 HONG KONG Tel: (+49) 89-31970-0 Tel: (+81) (3) 6417-0300 www.atmel.com Tel: (+852) 2245-6100 Fax: (+49) 89-3194621 Fax: (+81) (3) 6417-0370 Fax: (+852) 2722-1369 (c) 2012 Atmel Corporation. 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