Ultra-low-voltage boosting system and control method thereof

Abstract

The invention relates to an ultra-low-voltage boosting system and a control method thereof. The ultra-low-voltage boosting system comprises an open-circuit voltage sampling holder, a polarity detection and control signal generator, a first-level switch tube, a flyback transformer, a rectifier bridge, an energy storage element and a singlechip, wherein the open-circuit voltage sampling holder is connected with a weak-energy output source or an energy converter and is also connected with the singlechip, the polarity detection and control signal generator and the flyback transformer; the first-level switch tube is connected with the polarity detection and control signal generator and the flyback transformer; the flyback transformer is connected with the rectifier bridge; and the rectifier bridge is connected with the energy storage element. By combining the ultra-low-voltage boosting system with the control method thereof, the defect that the circuit produced by a conventional process has difficulty in adapting to the working under a millivolt-level voltage in the field of environmental energy collection can be effectively avoided, and the defects that the boosting multiple and the boosting efficiency are very difficultly considered simultaneously in the prior art and the problem that an positive-negative bipolar input source is unresolved can be avoided.

Description

Technical field [0001] The invention belongs to the technical field of voltage conversion and power supply modules, and specifically relates to an ultra-low voltage boost system and a control method thereof, in particular to an ultra-low voltage boost system and a control method thereof in the field of environmental energy harvesting, which can output weak energy The weak voltage signal output by the power source or transducer is boosted and stored for long-term power supply for low-power devices such as wireless sensors. Background technique [0002] As the input voltage of the power supply voltage converter is getting lower and lower, even the turn-on voltage is only tens of mV, and its own conversion efficiency also affects the utilization rate of electric energy. For extremely weak electrical energy output sources, such as thermal energy (solar heat, geothermal, temperature changes, etc.) transducers, electromagnetic energy (light, electromagnetic waves, etc.) transducers, ki...

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Problems solved by technology

And combined with its control method, it can effectively avoid the defect that the circuit of traditional technology is difficult to adapt to the environmental energy harvesting working under the millivolt voltage, and can avoid the current technology that is difficult to take into account the boost multiple and boost efficiency at the same time and has not yet solved the positive and negative bipolar flaws in the question of sexual input sources

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