U6044B

TELEFUNKEN Semiconductors U 6044 B Radiator fan controlled timer Description The bipolar integrated circuit, U 6044 B, 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 cool-off process. In addition, an air-conditioning contact can switch on the radiator fan at any time. Features www.DataSheet4U.com D Delay time range: 4 s to 20 h D Cool-off time starts when thermal switch is closed D RC oscillator determines switching characteristics D Relay driver with Z-diode D Debounced input for coolant temperature switch D Not debounced input for ignition key (Terminal 15) D Low standby current D Load dump protection D RF interference protected D Protection according to ISO/TR 7637-1 (VDE 0839) Cases: DIP 8, SO 8 C2 10 m F VS 8 C1 R1 510 W x VBatt R2 Vstab 7 OSC 6 Oscillator Stabilization Power-on reset Load dump detection 1 GND Frequency divider Debouncing Monoflop Logic Relay control output 2 Thermal switch R4 300 kW R6 1 kW 4 Air condition 5 R5 300 kW 1 kW R7 Ignition 3 C4 100 nF C3 100 nF R3 20 kW Terminal 15 94 9232 x Figure 1 Block diagram with external circuit Rev. A1: 12.12.1994 1 U 6044 B Pin Configuration Pin Symbol 1 GND 2 Output 3 Ignition 4 Sth 5 AC 6 OSC www.DataSheet4U.com 7 Vstab 8 VS Function Reference point, ground Relay control output Signal input, ignition Thermal switch, input Air condition input RC o...