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This paper presents an innovative control scheme for single-inductor, multiple-output DC-DC converters operating in CCM. The proposed multi-loop technique exploits both charge control, used for the inner loops related to the different outputs, and average current mode control, used for the external loop that regulates the overall inductor current. This approach provides an independent regulation of...
This paper investigates a fully-digital fixed frequency digital voltage-mode controller for DC-DC converters based on hysteresis modulation. The proposed architecture employes a digital-pulse width modulator (DPWM) and an analog-to-digital converter (ADC) based on a threshold inverter quantization (TIQ) technology, which enables flash-based analog-to-digital conversion and asynchronous detection of...
A simple auto-tuning technique, based on the relay feedback, for voltage-mode synchronous half bridge isolated POL converter is here reported. By means of the relay control, small oscillations on the output voltage are generated during converter soft-start. Based on the measurements of the frequency and amplitude of the oscillations, the gain and phase of the converter transfer function at the oscillation...
The rapidly growing use of digital control in Distributed Power Architectures (DPA) has been primarily driven by the increasing need of sophisticated Power Management functions. However, specifically designed control algorithms can also be exploited for optimizing the system performance. In this paper we present a new auto-tuning method and system that makes it possible to operate an isolated DC-DC...
This paper presents a new microstepping driving technique. The proposed approach exploits a digital current estimation algorithm and an integrator circuit to perform a 16 micro steps operation. The proposed solution allows, in an IC implementation, a consistent reduction of the silicon area compared to a conventional analog approach based on a 4 bit sinusoidal DAC. The presented control scheme was...
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