59results about How to "Accelerated shutdown" patented technology

The invention discloses a driving control method and a circuit thereof. A rising edge of an input signal is modulated into a positive pulse with a fixed pulse width through an edge modulation circuit,a falling edge of the input signal is modulated into a negative pulse with a fixed pulse width, a plurality of continuous positive pulses are generated at a certain period in a state that the input signal is at a continuous high level, and the period is adjustable; positive and negative pulses generated by the edge modulation circuit are transmitted to the secondary side from the primary side inan isolation mode through the isolation transformer; a first positive pulse generated by the secondary side of the isolation transformer is demodulated into a rising edge of a driving signal through adriving holding circuit; a plurality of continuous positive pulses generated by the secondary side of the isolation transformer are demodulated to continuously supplement energy to the driven power tube so as to maintain the driving voltage, and negative pulses generated by the secondary side of the isolation transformer are demodulated to the falling edge of the driving signal so as to restore the input signal. The driving control method and the circuit thereof can achieve the purpose of isolation drive and have a normally open function of keeping continuous conduction of the MOS transistor.