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CA3059 Datasheet(PDF) 1 Page - ON Semiconductor |
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CA3059 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 6 page 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. Figure 1. Representative Block Diagram RL - RP + 15 V 100 µF MT2 MT1 Gate Zero Crossing Detector Power Supply 2 AC Input Voltage AC Input RS 5 VCC VCC 4 * RX * NTC Sensor Inhibit External Trigger Current Boost 3 Triac Drive Limiter 14 12 11 10 9 13 Gnd VCC 81 6 Protection Circuit - + On/Off Sensing Amp 7 DC Mode or 400 Hz Input 2. Differential On/Off Sensing Amplifier — Tests for condition of external sensors or input command signals. Proportional control capability or hysteresis may be implemented using this block. 3. Zero–Crossing Detector — Synchronizes the output pulses to the zero voltage point of the AC cycle. This synchronization eliminates RFI when used with resistive loads. 4. Triac Drive — Supplies high–current pulses to the external power controlling thyristor. 5. Protection Circuit — A built–in circuit may be actuated, if the sensor opens or shorts, to remove the drive current from the external triac. 6. Inhibit Capability — Thyristor firing may be inhibited by the action of an internal diode gate at Pin 1. 7. High Power DC Comparator Operation — Operation in this mode is accomplished by connecting Pin 7 to Pin 12 (thus overriding the action of the zero–crossing detector). When Pin 13 is positive with respect to Pin 9, current to the thyristor is continuous. 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 AC Input Voltage (50/60 Hz) Vac Input Series Resistor (RS) k Ω Dissipation Rating for RS W 24 2.0 0.5 120 10 2.0 208/230 20 4.0 277 25 5.0 ON Semiconductort © Semiconductor Components Industries, LLC, 2001 August, 2001 – Rev. 1 1 Publication Order Number: CA3059/D Device Operating Temperature Range Package CA3059 SEMICONDUCTOR TECHNICAL DATA ZERO VOLTAGE SWITCH ORDERING INFORMATION CA3059 TA = – 40° to +85°C Plastic DIP PLASTIC PACKAGE CASE 646 1 14 |
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