AC-DC CONVERTER
First Claim
1. An alternating current-direct current (AC-DC) converter comprising:
- an input AC power supply that outputs an input AC voltage;
a step-up converter that converts the input AC voltage into an output DC voltage and outputs the output DC voltage from an output capacitor; and
an inrush current suppressing circuit,the inrush current suppressing circuit including;
an inrush current suppressing resistor provided on a path through which a current from the input AC power supply flows to charge the output capacitor of the step-up converter and returns to the input AC power supply;
a resistance short-circuiting switch that short-circuits the inrush current suppressing resistor; and
a control circuit that generates a signal for turning off the resistance short-circuiting switch when an absolute value of the input AC voltage is higher than the output DC voltage.
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Accused Products
Abstract
An alternating current-direct current (AC-DC) converter includes: an input AC power supply that outputs an input AC voltage; a step-up converter that converts the input AC voltage into an output DC voltage to be outputted from an output capacitor; and an inrush current suppressing circuit. The inrush current suppressing circuit includes: an inrush current suppressing resistor provided on a path through which a current from the input AC power supply flows to charge the output capacitor and returns to the input AC power supply; a resistance short-circuiting switch that short-circuits the inrush current suppressing resistor; and a control circuit that generates a signal for turning off the resistance short-circuiting switch when an absolute value of the input AC voltage is higher than the output DC voltage.
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Citations
7 Claims
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1. An alternating current-direct current (AC-DC) converter comprising:
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an input AC power supply that outputs an input AC voltage; a step-up converter that converts the input AC voltage into an output DC voltage and outputs the output DC voltage from an output capacitor; and an inrush current suppressing circuit, the inrush current suppressing circuit including; an inrush current suppressing resistor provided on a path through which a current from the input AC power supply flows to charge the output capacitor of the step-up converter and returns to the input AC power supply; a resistance short-circuiting switch that short-circuits the inrush current suppressing resistor; and a control circuit that generates a signal for turning off the resistance short-circuiting switch when an absolute value of the input AC voltage is higher than the output DC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification