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    A Consideration of Signal Frequency Detector in Digital Peak Current Mode DC-DC Converter
    (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2015-11-22) Furukawa, Yudai; Maeda, Shusuke; Tsuruoka, Shunsuke; Kurokawa, Fujio; Eto, Haruhi; Çolak, İlhami
    The purpose of this paper is to reveal the designing of the static characteristic of the digital peak current mode dc-dc converter using a voltage controlled oscillator (VCO). In the proposed method, it is able to sample the reactor current by using the VCO and the delay circuit. The improvement of the dynamic characteristic and the analysis of the proposed method have already been revealed. However the design method in the static characteristic of the proposed method has not been clear. In this paper, the analysis about the resolution of the output voltage is revealed for the designing of the proposed method in static characteristic. The change of the output voltage against the change of the delay time in the signal frequency detector is confirmed by comparing the analysis result and simulation results. Furthermore, the effect, which the signal frequency detector gives to the output voltage in the transient state, is discussed.
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    Performance Characteristic of Digital Peak Current Mode Control Switching Power Supply
    (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2015-09-08) Furukawa, Yudai; Maeda, Shusuke; Kurokawa, Fujio; Çolak, İlhami
    The purpose of this paper is to discuss performance characteristic of digital peak current mode control switching power supply. The proposed method can capture the peak current value in real time by using the voltage controlled oscillator (VCO), the programmable delay circuit and the signal frequency detector. Its transfer function is derived analytically. Also, the frequency characteristics are revealed using the loop transfer function in the case of different voltage control loop gains. In addition, its gain margin and phase margin are discussed. Furthermore, the transient responses of proposed method are compared with the conventional voltage mode control in the simulation and the experiment.
  • Küçük Resim
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    Performance Characteristics of Digital Current Detector in DC-DC Converter
    (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2015) Furukawa, Yudai; Maeda, Shusuke; Kurokawa, Fujio; Çolak, İlhami
    The purpose of this paper is to present a performance characteristics of digital current detector in dc-dc converter. The digital peak current mode control dc-dc converter using the voltage-controlled oscillator (VCO) has already proposed. The peak current is detected by using VCO in the proposed method. The gain of amplifier in the current detector affects to the input voltage range of VCO. Also, it affects the transient response. They are discussed by analysing and simulation.