U217B

U217B/ U217B-FP Zero Voltage Switch with Adjustable Ramp Description The integrated circuit, U217B, is designed as a zerovoltage switch in bipolar technology. It is used to control resistive loads at mains by a triac in zero-crossing mode. A ramp generator allows to realize power control function by period group control, whereas full wave logic guarantees that full mains cycles are used for load switching. Features D Direct supply from the mains D Current consumption ≤ 0.5 mA D Very few external components D Full wave drive – no dc current component in the load circuit D Negative output current pulse typ. 100 mA – short circuit protected D Simple power control D Ramp generator D Reference voltage Applications D Full wave power control D Temperature regulation D Power blinking switch Package: DIP8, SO8 Block Diagram 95 10872 220 kW R2 (250 V~) (Rsync) D1 BYT86/800 R1 18 kW/ 2W Load 1000 W L C2 2.2 mF/ 10 V R4 100 kW R5 15 kW max 100 kW min R6 58 kW 2 1 Ramp genera...