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The digital control has the attractive capability, for instance, the high-performance function and the energy management capability. On the other hand, there are issues which must be solved for the actual implementation. The proposed method can solve some of them, namely the transient response, the dynamic characteristics and the precision of the controller, with the simple method.
In this paper, we present a feedback gain changing dc-dc converter. The proposed method corresponds to the input voltage variation because the integral gain is determined in consideration of it. Generally, a quick transient response cannot be obtained when the proportional gain is small. On the other hand, when the proportional gain is set to a large value, the transient response is improved. However,...
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...
The aim of this paper is to present static and dynamic analyses of digital peak current mode dc-dc converter. The current detection circuit of the proposed method consists of RC integrator and comparator as the AD converter. The proposed method can detect the peak current in real time. Analyses and the transient response of proposed method are discussed in this paper. As a result, the convergence...
This paper studies the digital controlled dc-dc converter which employs the neural network in coordination with PID control. Especially, we focus on the problem of overcompensation to the transient response of the output voltage in the dc-dc converter by the neural network control. Our previous studies suggested that the neural network control is effective to improve the transient response of the...
In the previous research, the fast P control method is proposed. In this method, the PID control part is divided into the P control and I-D control parts. The high speed-low resolution A-D converter and low speed-high resolution A-D converter are required for the P control and I-D control, respectively. These two A-D converters are lower cost than the high-speed and high-resolution A-D converter....
The purpose of this paper is to present the transient response in the proposed digitally controlled dc-dc converter under the various changes. The digital PID control circuit has a delay time mainly due to the calculation and sampling. This delay time heavily affects the transient responses. In the proposed method, a twist is added to the PID control in order to achieve fast response. In addition,...
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...
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