U6046B Datasheet, PDF (1/13 Pages) TEMIC Semiconductors – Rear Window Heating Timer

Features
• 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
Rear Window
Heating Timer/
Long-term
Timer
U6046B
C₂
OSC ₆
R₂
47 mF
C₁ R₁
V_{stab 7}
V_{S 8}
510 W
V_Batt
Oscillator
Stabilization
Power-on reset
Load-dump detection
1
GND
3
ON
4
OFF
5
TOGGLE
Frequency divider
Debouncing
Mono-flop
Relay control
output
2
OUT
Rev. 4674A–AUTO–01/03
1