DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon

A control circuit for controlling a direct-current to direct-current conversion, comprising:

• an amplifier amplifying a difference between a first voltage signal, corresponding to an output voltage produced as a result of said direct-current to direct-current conversion, and a reference voltage signal;
• a pulse width modulator controlling pulse width modulation based on an output of said amplifier;
• and
• a discharging circuit discharging charges corresponding to the output voltage, produced as a result of said direct-current to direct-current conversion, to be input to said amplifier when said direct-current to direct-current conversion stops.

A control circuit controlling a direct-current to direct-current conversion, comprising:

• a first controller controlling a first direct-current to direct-current conversion so as to output a first voltage;
• a second controller controlling a second direct-current to direct-current conversion so as to output a second voltage;
• and
• a discharging control unit controlling discharging of charges, corresponding to each output voltage and produced as a result of said first and second direct-current to direct-current conversions, to ground when said direct-current to direct-current conversions stop.

A direct-current to direct-current converter, comprising:

• an amplifier amplifying a difference between a first voltage signal, corresponding to an output voltage produced as a result of a direct-current to direct-current conversion, and a reference voltage signal;
• a pulse width modulator controlling pulse width modulation based on an output of said amplifier;
• and
• a discharging circuit discharging charges corresponding to the output voltage, produced as a result of said direct-current to direct-current conversion, to be input to said amplifier when said direct-current to direct-current conversion stops.

An apparatus performing direct-current to direct-current conversions using a synchronous rectifying control, comprising:

• a first synchronous recodifying switch provided between a ground and a first line on which an output voltage of a result of a first direct-current to direct-current conversion appears for a first load;
• a second synchronous rectifying switch provided between a ground and a second line on which an output voltage of a result of a second direct-current to direct-current conversion appears for a second load;
• a first control circuit controlling an on/off operation of said first synchronous rectifying switch;
• and
• a second control circuit controlling an on/off operation of said second synchronous rectifying switch;
• and
• a discharging control circuit turning on said first and second synchronous rectifying switches to discharge charges corresponding to the output voltage of a result of said first and second direct-current to direct-current conversions when the direct-current to direct-current conversions stop.

A control circuit of apparatus for effecting a plurality of direct-current to direct-current conversions using a synchronous rectifying control, comprising:

• a first control circuit controlling on/off operations of a first synchronous rectifying switch provided between a ground and a first line on which a first output voltage of a result of a first direct-current to direct-current conversion appears so as to output a first voltage to a first load;
• a second control circuit controlling on/off operations of a second synchronous rectifying switch provided between a ground and a second line on which a second output voltage of a result of said direct-current to direct-current conversion appears so as to output a second voltage to a second load;
• and
• a discharging control unit turning on said first and second synchronous rectifying switches to discharge charges corresponding to the first and second output voltages resulting from said first and second direct-current to direct-current conversions when said first and second direct-current to direct-current conversions stop.

An apparatus for effecting a direct-current to direct-current conversion, comprising:

• a synchronous rectifying switch provided between ground and a line on which an output voltage, of a result of said direct-current to direct-current conversion, appears;
• a control circuit controlling an on/off operation of said synchronous rectifying switch;
• and
• said control circuit including a discharging control circuit turning on said synchronous rectifying switch to discharge charges corresponding to the output voltage, of a result of said direct-current to direct-current conversion, when the direct-current to direct-current conversion stops.

A direct-current to direct-current converter effecting a direct-current to direct-current conversion, comprising:

• a synchronous rectifying switch provided between ground and a line on which an output voltage, of a result of said direct-current to direct-current conversion by the direct-current to direct-current converter, appears;
• a control circuit controlling an on/off operation of said synchronous rectifying switch;
• and
• said control circuit including a discharging control circuit turning on said synchronous rectifying switch to discharge charges corresponding to the output voltage, of a result of said direct-current to direct-current conversion by the direct-current to direct-current converter, when the direct-current to direct-current conversion stops, the output voltage of the direct-current to direct-current converter comprising an input to the direct-current to direct-current converter determining the output voltage thereof.