U217B switch equivalent, zero-voltage switch.
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 circu.
D Full-wave power control D Temperature regulation D Power blinking switch
Block Diagram
220 kW R2 (250 V~) (Rsync)
D.
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 power control function by period group control, wherea.
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