U6046B ATMEL Corporation, U6046B Datasheet

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U6046B

Manufacturer Part Number
U6046B
Description
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer
ATMEL Corporation
Datasheet
Features
1. Description
The bi-polar long-term timer U6046B is designed to automatically limit the operation
time of high loads in the harsh automotive environment with a preset delay time. With
the power-on-reset function the timers guarantee that current consuming devices are
not operated unintentionally.
The delay time can be interrupted manually, but a retrigger function is not provided.
Figure 1-1.
TOGGLE
Delay Time Range: 3.7s to 20h
RC Oscillator Determines Timing Characteristics
Relay Driver with Z-diode
Debounced Input for Toggle Switch
Two Debounced Inputs: ON and OFF
Load-dump Protection
RF Interference Protected
Protection According to ISO/TR7637-1 (VDE 0839)
Inputs Switched to V
OFF
ON
4
5
3
Block Diagram with External Circuit
Debouncing
Batt
OSC
C
Oscillator
2
6
Frequency divider
Mono-flop
R
2
V
stab
Load-dump detection
Power-on reset
7
Stabilization
Relay control
47 F
output
V
S
8
C
1
510
1
2
GND
R
OUT
1
V
Batt
Rear Window
Heating Timer/
Long-term
Timer
U6046B
Rev. 4674B–AUTO–09/05

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U6046B Summary of contents

Page 1

... Inputs Switched to V Batt 1. Description The bi-polar long-term timer U6046B is designed to automatically limit the operation time of high loads in the harsh automotive environment with a preset delay time. With the power-on-reset function the timers guarantee that current consuming devices are not operated unintentionally. ...

Page 2

... Pin Configuration Figure 2-1. Table 2-1. Pin Description Pin U6046B 2 Pinning 1 GND OUT OFF 4 Symbol Function GND Reference point, ground OUT Relay control output ON Switch-on input OFF Switch-off input TOGGLE Toggle input OSC RC-oscillator input VSTAB Stabilized voltage VS Supply voltage 8 VS ...

Page 3

... R Figure 3-1. 4674B–AUTO–09/05 Figure smooths the supply voltage at pin 510 , µ circuit is omitted Basic Circuit for 12V Supply and Oscillator V Batt 3-1. Dropper resistor limits the current Therefore, the operation of the Batt Figure 3-2 on page 510 U6046B U6046B 4, 3 ...

Page 4

... The capacitor and discharged by an integrated 2-k resistor. 2 >> are constants as such 2 = 1.551 when C = 470 1.284 when 4700 and the delay time shows relationships between U6046B depend on the oscillator frequency follows and frequencies from 4674B–AUTO–09/05 ...

Page 5

... 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. Figure 3-3. 4674B–AUTO–09/ and an integrated Z-diode, while the inputs are protected 1 1 TOGGLE Function V Batt R 510 Figure 3-6 on page U6046B U6046B 8). 5 ...

Page 6

... TOGGLE function over. d Figure 3-4 on page , whereas the switching of the pin 4 switch correspondingly leads to the relay over when the battery voltage shows the input circuit of U6046B. It has an integrated pull-down resis- – V Batt Z where V =12V, V =7V Batt Z – ...

Page 7

... It can be increased by connecting a 5.6 k resistor from the push-button switch to ground as shown in Figure 3-4. 4674B–AUTO–09/05 Figure 7-4 on page 13. ON/OFF Function V Batt R 510 U6046B U6046B 7 ...

Page 8

... Timing Waveform Figure 3-5. Figure 3-6. U6046B 8 Behavior of the Relay Control Output as a Function of Input Condition Diagram 5A Toggle t 3 Relay Diagram OFF t 3 Relay Diagram 5C ON OFF Relay t 3 Input Circuit U6046B Batt Pin Pin 5 Pin 2 Pin 3 Pin 4 Pin 2 Pin 3 ...

Page 9

... Figure 3-2 on page 12V 7 Batt Power on reset All push buttons open 200 300 14V 2 t 300 Table 6-1 on page 10, Pin Lower Upper U6046B Value 24 –40 to +125 –55 to +125 150 Value 120 160 Symbol Min. Typ. Max Batt 4.3 6 5.0 5.2 5 3.0 4 ...

Page 10

... Debounce Time 100 200 300 400 500 600 700 800 900 1000 U6046B 10 Figure 2-1 on page 2, unless otherwise specified Test Conditions Pin 3,4,5 Delay Time min 6000 1229 3000 614 2000 410 1500 307 1200 246 1000 205 857 176 750 ...

Page 11

... Delay Time min 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 U6046B 6.7 1 6.1 1 5.7 1 5 ...

Page 12

... Figure 7-2. U6046B 12 Generation of a Monostable Delay Time, t Voltage V , not Externally Deactivatable Batt V Batt R 510 U6046B Generation of a Monostable Delay Time Deactivatable by the OFF Push-button Batt V Batt R 510 U6046B Caused by Applying the Operating Applying the Operating Voltage 4.7 F 4674B–AUTO–09/05 ...

Page 13

... Figure 7-3. Figure 7-4. 4674B–AUTO–09/05 Monostable Delay Time can be Activated by the ON Push-button, not Exter- d nally Deactivatable V Batt R 510 U6046B Increasing the Contact Current by Parallel Resistors V Batt 5 U6046B 5 U6046B 13 ...

Page 14

... Ordering Information Extended Type Number U6046B-MY U6046B-MFPY U6046B-MFPG3Y 9. Package Information U6046B 14 Package Remarks DIP8 Pb-free SO8 Tubed, Pb-free SO8 Taped and reeled, Pb-free ific a tio 4674B–AUTO–09/05 ...

Page 15

... DIN specifications 1 4 History Put datasheet in a new template Pb-free Logo on page 1 added Heading Rows on Table “Absolute Maximum Ratings” on page 9 added Table “Ordering Information” on page 14 changed U6046B 5.2 4.8 3.7 0.2 3.8 6.15 5.85 15 ...

Page 16

... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...

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