U6046B

U6046B / U6047B Rear Window Heating Timer Description The window heating timers are bipolar integrated circuits. Due to time controlled functions, they reduce the current consumptions of high loads i.e., heating resistors. An ON-relay can be switched off after a preset delay time. The relay time can be interrupted manually, whereas a retrigger function is not provided. Features D D D D D Delay time range: 3.7 s to 20 h RC oscillator determines switching characteristics Relay driver with Z-diode Debounced input for toggle switch Two debounced inputs: ON and OFF D D D D D Load-dump protection RF interference protected Protection according to ISO/TR7637-1 (VDE 0839) U6046B: Inputs switched to VBatt U6047B: Inputs switched to ground Ordering Information Extended Type Number U6046B, U6047B U6046B–FP, U6047B–FP Package DIP8 SO8 Remarks Block Diagram C2 R2 6 Vstab 7 47 mF C1 R1 510 W VBatt OSC VS 8 Oscillator Stabilization Power-on reset Load-dump detection 1 GND Frequency divider 3 ON 4 OFF 5 TOGGLE 94 8747 Debouncing Monoflop Relay control output 2 Figure 1. Block diagram with external circuit TELEFUNKEN Semiconductors Rev. A2, 03-Feb-97 1 (11) U6046B / U6047B Pin Configuration Pin 1 2 3 4 5 6 7 8 Symbol GND RELAY ON OFF TOGGLE OSC Vstab VS Function Reference point, ground Relay control output Switch-on input Switch-off input Toggle input RC oscillator input Stabilized voltage Supply voltage GND RELAY 1 8 VS Vstab OSC TOGGLE 2 7 ON OFF 3 6 4 94 8844 5 F...