TCA280A

II TCA280A TRIGGER MODULE The TCA280A is a monolithic integrated circuit designed for thyristor and triac control. It contains the following circuit sections: - d.c. power supply (intended for direct a. c. supply) - zero-crossing detector (for synchronization of the trigger circuit) - difference amplifier (used as a sensing amplifier) - ramp function generator (operating as the sawtooth oscillator in time,..proportional control) - output amplifier (amplifying the trigger pulses and feeding the thyristor or triac gate) Various control modes possible when using the TCA280Aare: - phase control - synchronous on/off switching (static switch) - time proportional control The device is designed to be supplied directly from the a. c. mains through a dropping resistor, alternatively, supply can be obtained from a 14,5 V (d. c.) source connected between pins 11 and 16. The output current capability permits triggering of large thyristors and triacs. '---- PACKAGE OUTLINE plastic 1...