| 摘要 |
A half-bridge converter having an improved power factor is provided. The half-bridge converter has a bridge diode unit for providing a current path to a power factor improving unit and transmitting energy to a voltage smoothing capacitor; the voltage smoothing capacitor for storing energy provided by the bridge diode unit; and a switching unit having two switches serially connected between both ends of the voltage smoothing capacitor, in which the power factor improving unit for feeding the voltage of the common connection point of the switches forming the switching unit back to the common connection point of the input capacitors so as to change an input current according to the magnitude of the input voltage is further included. According to the half-bridge converter, conducting loss occurring in the switching unit decreases and the power factor of the input terminal is improved.
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