DESCRIPTION
The bipolar integrated circuit, U6049B, is designed as a radiator fan controlled timer. After the ignition is switched off, the thermal switch of the engine can activate the radiator fan via relay for a preset period to support the cooling process. FEATURES
D D D D D Delay time range: 3.7 s to 20 h Cooling time starts when thermal switch is closed RC-oscillator determines switching characteristics Relay driver with Z-diode Debounced input for coolant temperature switch D Not debounced input for ignition key (Terminal 15) D Load-dump protection D RF interference protected D Protection according to ISO/TR 7637-1 (VDE 0839) Ordering Information Extended Type Number U6049B U6049B–FP Package DIP8 SO8 Remarks Block Diagram C2 OSC 6 Oscillator R2 Vstab 7 47 mF VS 8 C1 R 1 510 W VBatt Stabilization Power-on reset Load-dump detection 1 GND Frequency divider Debouncing Monoflop Logic Relay control output 2 Output Thermal switch 4 R4 2 kW Ignition 5 Programming C3 100 nF R3 3 94 8748 VBatt R5 20 kW Terminal 15 Figure 1.
TEMIC Semiconductors
