U6032B-MFPG3Y - Atmel - Datasheet.Directory

4771C–AUTO–06/12

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® 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.

Atmel U6032B

Automotive Toggle Switch IC

DATASHEET

2Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

Figure 1. Block Diagram with External Circuit

Stabilization

Power-on reset

Load-dump detection

Debouncing Relay-control output

Oscillator

Frequency divider

OFF

TOGGLE

GND

OSC 678

510Ω

47µF

stab

Batt

3Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

1. Pin Configuration

Figure 1-1. Pinning DIP8

Table 1-1. Pin Description

Pin Symbol Function

1GND Reference point, ground

2RELAY Relay control output

3ON Switch-on input

4OFF Switch-off input

5TOGGLE Toggle input

6OSC RC oscillator input

7VSTAB Stabilized voltage

8VS Supply voltage

GND

RELAY

OFF TOGGLE

OSC

VSTAB

4Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

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

Recommended values are: R1 = 510Ω, C1 = 47µF.

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

Figure 2-2. Basic Circuit for VS = 5V

47µF/

16V

510 ΩC

U6032B

Batt

= 5V

U6032B

5Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

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 (2kΩ) 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 (2kΩ), 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:

where

t1 = charge time = α1 × R2 × C2

t2 = discharge time = α2 × 2kΩ × C2

α1 and α2 are constants, e.g.:

α1 = 0.833 and α2 = 1.551 when C2 = 470pF to 10nF

α1 = 0.746 and α2 = 1.284 when C2 = 10nF to 4700nF

The debounce time, t3, depends on the oscillator frequency, f, as follows:

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 Z-

diode 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.

t1t2

--------------=

t361

---

×=

6Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

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

2.8 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® U6032B. It has an integrated pull-down resistor (20kΩ), RF capacitor (15pF) and

Z-diode (7V). It reacts to voltages greater than 2V. The external protective resistor has a value of 20kΩ and the push-button

switch, S, is connected to the battery as shown in the diagram.

The contact current, I, is calculated as follows:

where VBatt = 12V, VZ = 7V

It can be increased by connecting a 5.6kΩ resistor from the push-button switch to ground as shown in Figure 2-6 on page 7.

Figure 2-4. Input Circuit

47µF/

16V

510 Ω

Batt

20kΩ

U6032B

IVBatt VZ

–

R(= 20kΩ)

--------------------------=

I(12 - 7)V

20kΩ

----------------------0.25mA≈=

7 V

15pF

20kΩ

Pin 3, 4, 5

20k Ω

VBatt SR

7Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

Figure 2-5. ON/OFF Function

Figure 2-6. Increasing the Contact Current by Parallel Resistors

47µF/

16V

510 Ω

Batt

20kΩ20kΩ

U6032B

20kΩ

2mA

Batt

20kΩ

5.6kΩ5.6kΩ

U 6032B

3. 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

Junction temperature Tj150 °C

4. Thermal Resistance

Parameters Symbol Value Unit

Junction ambient DIP8 TthJA 110 K/W

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4771C–AUTO–06/12

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. Typ. Max. Unit

Operating voltage

R1≥510Ω

t<5min

t < 60min

VBatt 6

18 V

5 V supply Without R1, C17, 8 V8, V74.3 6.0 V

Stabilized voltage VBatt = 12V 7 V75.0 5.2 5.4 V

Undervoltage threshold Power-on reset VS3.0 4.2 V

Supply current All push buttons open 8 IS1.3 2.0 mA

Internal Z-diode I8 = 10mA 8 VZ13.5 14 16 V

Relay Control Output 2

Saturation voltage I2 = 200mA

I2 = 300mA V2

1.2

1.5 V

Leakage current V2 = 14V Ilkg 2100 µA

Output current I2300 mA

Output Pulse Current

Load-dump pulse t ≤ 300ms I21.5 A

Internal Z-diode I2 = 10mA VZ20 22 24 V

Oscillator Input f = 0.001 to 40kHz,

see Table 5-1 6

Internal discharge resistance V6 = 5V R61.6 2.0 2.4 kΩ

Switching thresholds Lower

Upper

V6L

V6H

0.9

2.8

1.1

3.1

1.4

3.5 V

Input current V6 = 0V -I61µA

Switching Times

Debounce time t35 7 Cycles

Inputs ON, OFF, TOGGLE 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 kΩ

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 (kΩ)

16000 4700 280

23000 1000 650

32000 1000 440

41500 1000 330

51200 1000 260

61000 1000 220

7857 1000 190

8750 1000 160

9667 1000 140

10 600 1000 130

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4771C–AUTO–06/12

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 1600

3000 2.00 1400

4000 1.50 1300

5000 1.20 1240

6000 1.00 1200

7000 0.86 1170

8000 0.75 1150

9000 0.67 1130

10000 0.60 1120

11000 0.55 1110

12000 0.50 199

13000 0.46 191

14000 0.43 185

15000 0.40 179

16000 0.38 174

17000 0.35 170

18000 0.33 166

19000 0.32 162

20000 0.30 159

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 (kΩ)

10Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

7. Package Information

Figure 7-1. DIP8

6. Ordering Information

Extended Type Number Package Remarks

U6032B-MY DIP8 Pb-free

Package: DIP8

Dimensions in mm

specifications

according to DIN

technical drawings

9.8 max.

2.54 nom.

0.3

0.36 max.

0.4 A

1.54

0.65

9.6±0.1 7.62±0.15

3.6±0.1

4.2±0.3

1.8

6.7

2.5

1.2±0.3

0.53±0.05 6.3±0.1

8.75±0.8

3 x 2.54 = 7.62 nom.

Issue: 1; 16.01.02

Drawing-No.: 6.543-5040.01-4

11Atmel U6032B [DATASHEET]

4771C–AUTO–06/12

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

4771C-AUTO-06/12

• Section 4 “Thermal Resistance” on page 7 changed

• 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

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