CA3059

CA3059 Zero Voltage Switch This series is designed for thyristor control in a variety of AC power switching applications for AC input voltages of 24 V, 120 V, 208/230 V, and 277 V @ 50/60 Hz. Applications: Relay Control Valve Control Heater Control Lamp Control On−Off Motor Switching Differential Comparator with Self−Contained Power Supply for Industrial Applications Synchronous Switching of Flashing Lights http://onsemi.com ZERO VOLTAGE SWITCH SEMICONDUCTOR TECHNICAL DATA RS 5 AC Input Limiter AC Input Voltage 100 μF + 15 − V * RX 12 DC Mode or 400 Hz Input RP 14 Protection Circuit 13 + On/Off Sensing Amp 9 − 10 VCC 11 Power Supply Zero Crossing Detector 2 VCC VCC Current RL Boost 3 MT2 Triac 4 Drive MT1 Gate * NTC Sensor Gnd 7 8 1 Inhibit 6 External Trigger Figure 1. Representative Block Diagram AC Input Voltage (50/60 Hz) Vac 24 120 208/230 277 Input Series Resistor (RS) kΩ 2.0 10 20 25 Dissipation Rating for RS W 0.5 2.0 4.0 5.0 14 1 PLASTIC PACKAGE CASE 646 ORDERING INFORMATION Operating Device Temperature Range Package CA3059 TA = − 40° to +85°C Plastic DIP FUNCTIONAL BLOCK DESCRIPTION 1. Limiter−Power Supply — Allows operation of the CA3059 directly from an AC line. Suggested dropping resistor (RS) values are given in the table below. 2. Differential On/Off Sensing Amplifier — Tests for condition of external sensors or input command signals. Proportional control capability or hysteresis may be implemented usin...