A self-adaptive voltage regulation circuit for power converter

Abstract

The invention belongs to the technical field of electronic circuits and relates to an adaptive voltage regulation circuit for a power converter. The circuit of the present invention includes a logic module, a conduction time generator, a first comparator, a second comparator and a control circuit; the input terminal of the logic module is connected to the output terminal of the power converter, and the output terminal is connected to the conduction time generator The output terminal of the circuit; the positive input terminal of the first comparator is connected to the output terminal of the power converter, the negative input terminal is connected to the output terminal of the control circuit, and the output terminal is connected to the input terminal of the control circuit; the second comparator The positive input terminal of the comparator is connected to the output terminal of the power converter, its negative input terminal is connected to the output terminal of the control circuit, and its output terminal is connected to the input terminal of the control circuit; the output terminal of the control circuit is connected to the input of the conduction time generator terminal; the output terminal of the on-time generator is connected to the power converter. The beneficial effect of the invention is that the inductance current in the voltage regulation process of the power converter is reduced, and the requirement on the inductance is lowered.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and relates to an adaptive voltage regulation (Adaptive Voltage Scales, AVS) circuit for a power converter. Background technique [0002] With the development of technology, the integration of digital integrated circuits (such as system-on-chip SoC, central processing unit CPU and digital signal processor DSP) is getting higher and higher. Low power consumption, and can work at different frequencies and voltages according to system requirements. [0003] AVS technology adaptively searches for the minimum voltage of the digital integrated circuit at this frequency according to the different working frequency of the digital integrated circuit. Many existing electronic components, such as CPU and DSP, can work at different clock frequencies. When the digital integrated circuit works at high frequency, the main part of the integrated circuit power consumption is the switching power cons...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, since the gate drive signal duty cycle of the power tube in the DC-DC converter of the adaptive voltage regulation technology is fixed, the power tube is turned on for a fixed time, and the time for the current to charge the inductor is always long. Leading to problems such as large power-on overshoot voltage and large output voltage ripple

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