U217B
Overview
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.
- 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
