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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.
TCA280A Datasheet
