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The purpose of this paper is to present performance characteristics of a quick response digital peak-current-mode 380V dc-dc converter for the green IT system. A proto-type is constructed as the digital control dc-dc converter used in the higher voltage direct current (HVDC) system for the green IT. The proto-type uses the digital peak-current-mode control to show a superior transient response. A...
The purpose of this paper is to present a transient response of proposed quick response peak current control dc-dc converter. In the proposed method, the peak current is able to be detected in real time by using voltage controlled oscillator (VCO) which is very low cost and a high speed A-D converter. The proposed circuit generates the turn off signal of the main switch. In simulated results, the...
This paper presents a fast response digitally controlled full bridge converter in parallel operation. The digital controlled circuit has some problem. One of the main problems is the delay time. The delay time includes the conversion time of A-D converter and processing time of digital controller. It exerts a bad influence on the dynamic characteristic. In the proposed method, the sample timing for...
The purpose of this paper is to present a digitally controlled dc-dc converter with a novel peak current injected technique. In the proposed method, the peak current is able to be detected by using a voltage controlled oscillator (VCO) which is very low cost and the simple delay circuit implemented by the a field programmable gate array (FPGA). As a result, it is confirmed the main switch is turned...
This paper presents a new digital peak current mode dc-dc converter using a FPGA delay circuit and a simple A-D converter. The peak current detection circuit is only composed of RC integrator and field programmable gate array (FPGA) delay circuit. The sampling point of detected current is changed by the feedback value of output voltage. The RC integrator is performed as the A-D converter for the current...
This paper presents a novel digital P-I-D control FPGA for a switching power supply in the higher voltage direct-current (HVDC) power feeding system. At first, digital fast P control buck type converter is presented. Then, the appropriate number of sample point is determined. Then the fast P control is applied to the full bridge converter for HVDC. The acceptable delay time, with realizing superior...
The purpose of this paper is to present a novel digital peak-current detector and the dynamic characteristics of the current mode dc-dc converter using proposed one. The proposed circuit is able to detect the peak point of the switch/reactor current in real time only by comparing two pulse trains. The circuit principle is very simple. The peak point of the switch/reactor current is realized using...
The purpose of this paper is to present a new peak-current injected digital control circuit for dc-dc converter and its dynamic characteristics. The proposed circuit is able to detect the peak point of the switch current in real time only by comparing two pulse trains. At the moment when the peak switch current is detected, the proposed circuit generates the turn off signal of the main switch. The...
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