Patent ID: 8988904
Filing Date: 2015-03-24
Classification: H02M,Y02B

Abstract:
1. A power supply for controlling current, the power supply comprising: a transformer which converts a first current into a second current and supplies the second current to a load line unit; a sampler which samples a peak value of the first current; an integrator which uses a signal proportional to the peak value of the first current and outputs a signal proportional to an average value of a current flowing through the load line unit; and a switching controller which controls a time during which the first current flows by means of the output signal of the integrator, wherein, with respect to a time during which energy stored in a first side of the transformer is completely transferred to a second side of the transformer, the integrator integrates the signal proportional to the peak value of the first current, and wherein the integrator calculates the energy transfer time by detecting a voltage variation of a connection portion between a first coil of the transformer and a switch controlling the on/off of the first current, and integrates the signal proportional to the peak value of the first current for the energy transfer time.