U6046B
| Model | U6046B |
| Description | REAR WINDOW HEATING TIMER / LONG-TERM TIMER |
| PDF file | Total 13 pages (File size: 239K) |
| Chip Manufacturer | ATMEL |
Features
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Delay Time Range: 3.7 s to 20 h
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
Batt
Description
The bi-polar long-term timer U6046B is designed to automatically limit the operation
time of high loads in the harsh automotive enviroment 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.
Block Diagram with External Circuit
47
mF
V
stab
V
S
Rear Window
Heating Timer/
Long-term
Timer
U6046B
C
2
OSC 6
R
2
C
1
R
1
7
8
510
W
V
Batt
Oscillator
Stabilization
Power-on reset
Load-dump detection
1
GND
Frequency divider
3
ON
4
OFF
5
TOGGLE
Debouncing
Mono-flop
Relay control
output
2
OUT
Rev. 4674A–AUTO–01/03
1
