Design of DC-DC Converters Frank Xi [email protected] Monolithic Power Systems Inc.. Pulse Skipping, Hysteretic, Constant-on etc.. DC-DC Converter Design Current Mode Buck (Peak Current Control) L C S1 V SW R ESR R L S2 R 1 R 2 V REF V RAMP S R Q QB CLK V FB V EA V IN V OUT CLK V. Abstract. The measurement of current in power converters, especially in switching DC-DC converters, is a very important task. This paper will establish a practical range for the time constants that we need to cover and will illustrate the effectiveness of DSP-based corrections for a few selected time-constant values.
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The constant-on current-mode DC-DC converter is widely used for powering microprocessors because of its fast loading transient response. But the DC regulation accuracy performance of this kind of converter is still unknown. In this paper, the accuracy of constant-on current-mode DC-DC converters for power microprocessors is thoroughly analyzed. The inaccuracy issue is pointed out and the root.. The control algorithm we designed can achieve the following two goals: 1) The DC output voltage can be adjusted to a pre-designed reference voltage within a finite time. 2) The current of inductor is strictly limited to a predetermined boundary, i.e., , where is a pre-requested constant. 2.3. Preliminaries.
