U217B-B Datasheet

Zero Voltage Switch with Adjustable Ramp


The integrated circuit, U217B, is designed as a zero voltage 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.

 Direct supply from the mains
 Current consumption ≤0.5 mA
 Very few external components
 Full wave drive – no dc current component in the load circuit
 Negative output current pulse typ. 100 mA – short circuit protected
 Simple power control
 Ramp generator
 Reference voltage

 Full wave power control
 Temperature regulation
 Power blinking switch



Manufacturer information

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