Soft Star Art and Frequency Synchronous Pulse Width Modulation Control with Overload Protection

摘要

The present invention discloses a soft star art and a frequency synchronous pulse width modulation control device having an overload protection function. The pulse width modulation control device includes a pulse width modulator for generating a pulse width modulated signal in response to a predetermined synchronous operation signal, and an overload protection unit for interrupting the operation of the pulse width modulator in response to a shutdown operation voltage in an enabled state. And an external synchronizing signal is input in normal operation to softly fix the soft star art voltage and generate a synchronous operation signal.In case of an overload condition, the soft star art voltage is increased higher than in normal operation to generate a shutdown operation voltage. It is characterized by including a protection control unit.