This advanced technology has been especially tailored to minimize on-state resistance, provide superior switching performance, and withstand high energy pulse in the avalanche and commutation mode. These devices. It combines optimized circuit protection and drive matched to low-loss IGBTs. Highly effective short-circuit. This capacitors provide self-healing.
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It is meant to control power in switching resistive loads of mains supply. Information regarding supply sync. To avoid dc load on the mains, full wave logic guarantees that complete mains cycles are used for load switching. A fire pulse is released when the inverted input of the comparator is negative Pin 4 with respect to the non inverted input Pin 3 and internal reference voltage. A ramp generator with free selectable duration is possible with capacitor C2 at Pin 2 which provides not only symmetrical pulse burst control figure 3 , but also control with superimposed proportional band figure Ramp voltage available at capacitor C2 is decoupled across emitter follower at Pin l.
To maintain the lamp flicker specification, ramp duration is adjusted according to the controlling load. In practice, interference should be avoided temperature control.
Therefore in such cases a two point control is preferred to proportional control. One can use internal reference voltage for simple applications. The firing pulse width is determined by the zero crossing identification which can be influenced with the help of sync.
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