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...

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