Micro energy capture MPPT control circuit and energy capture circuit

Abstract

The invention relates to a micro energy capture MPPT (Maximum Power Point Tracking) control circuit and an energy capture circuit. The MPPT control circuit comprises a multiplying unit, a delay unit, a first comparator, a second comparator, an FDRC (Fast Dynamic Response Circuit) and a signal superposition module, wherein the FDRC comprises a third comparator, a fourth comparator and an or circuit; the multiplying unit outputs Pi to an input of the delay unit and an in-phase end of the first comparator after inputting Vtem and Is; an output of the delay unit is connected with an invert-phase end of the first comparator; an output of the first comparator is connected with an invert-phase end of the third comparator, an in-phase end of the fourth comparator and an input of the signal superposition module; the in-phase input of VL is implemented by the third comparator, the inverted-phase input of VH is implemented by the fourth comparator, the input of the signal superposition module is connected with an output of the or circuit, an output of the signal superposition module is connected with the in-phase input of the second comparator, and the second comparator inputs Vosc in an inverted manner, and outputs a PWM (Pulse Width Modulation) control signal. The MPPT control circuit is adopted, the changing of the output power of a Boost converter with the input power all the time is guaranteed, the circuit is guaranteed to work at the maximum power point, so that the conversion efficiency of the whole circuit is improved.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to an MPPT control circuit and an energy acquisition circuit for micro-energy acquisition. Background technique [0002] In recent years, energy harvesting technology, as a low-cost, maintenance-free, non-polluting alternative energy technology, has attracted widespread attention from all walks of life. Energy harvesting technology can obtain energy from the outside world and convert it into usable electrical energy, which has the advantages of small area, low power consumption, and long battery life. However, this technology still faces many technical difficulties, such as: low conversion efficiency and poor output signal quality. The root cause of these problems is that the externally available energy sources are often tiny and unstable, and are easily affected by the surrounding environment, which imposes higher requirements on the performance of energy h...

AI Technical Summary

Problems solved by technology

However, this technology still faces many technical difficulties, such as: low conversion efficiency and poor output signal quality

The root cause of these problems is that the externally available energy sources are often tiny and unstable, and are easily affected by the surrounding environment, which puts higher demands on the performance of energy harvesting circuits

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