Patent ID: 6714429
Filing Date: 2004-03-30
Classification: H02H,H02M,Y02B,Y10S

Abstract:
An AC to DC power converter having active inrush current control during operational and power disturbance conditions, said converter having two input terminals to which AC power is coupled and two output terminals where the output DC power is provided, comprising:an input rectifier for generating a rectified input voltage from a source of said AC power; a boost converter coupled to said rectifier for converting said input voltage to a DC voltage, said boost converter having a first switch, an inductor, and a first diode; an output capacitor connected to a first one of said DC output terminals; a resistor connected in series between said output capacitor and a second one of said DC output terminals; a second switch having a control input and being connected in parallel with said resistor; a control circuit for controlling inrush current, said control circuit being operatively connected to said control input of said second switch, comprising: a comparator circuit for comparing the AC input and DC output voltages of the converter for causing said second switch to enter a conduction state when said AC input voltage exceeds a predetermined threshold and said AC input voltage is less than the DC output voltage.