Low-cost and low-power-consumption feedback-type detection brushless motor booster circuit

Abstract

The invention discloses a low-cost and low-power-consumption feedback-type detection brushless motor boost circuit. The circuit comprises a power supply battery and a brushless motor connected with the power supply battery, and is also provided with a boosted circuit connected with the power supply battery, a control circuit connected with the boosted circuit, a brushless motor adjusting circuit connected with the control circuit, a voltage division feedback circuit connected with the control circuit, and a touch switch circuit connected with the control circuit. The boost circuit comprises afirst inductor, a second unidirectional diode, a first MOS tube, a first capacitor, a fourth resistor and an eighth resistor. The control circuit comprises a control chip, a twelfth resistor and a fourth capacitor. The circuit is reasonable in structural arrangement, the working time of a product can be greatly prolonged by fixing the boosting duty ratio frequency, the service life of a battery can be protected, the use stability is good, and the practicability is high.

Description

Technical field [0001] The invention belongs to the technical field of booster circuits, and specifically relates to a low-cost and low-power consumption feedback type detection brushless motor booster circuit. Background technique [0002] The general feedback boost circuit keeps the boost output voltage at a relatively stable voltage value. Due to the law of conservation of power, under the same power output, the input current will be relatively low when the input voltage is low. Big. For battery products, the input current will be greater when the battery voltage is low, so the current needs to be detected. For the control chip, the requirements will be higher, which means that the overall circuit requirements will be higher. Increase, the overall cost will greatly increase. Summary of the invention [0003] The purpose of the present invention is to provide a low-cost and low-power feedback detection brushless motor booster circuit with reasonable structure and strong practi...

AI Technical Summary

Problems solved by technology

For products using batteries, that is, when the battery voltage is low, the input current will be greater, so it is necessary to detect the current. For the control chip, the requirements will be higher, that is to say, the requirements for the overall circuit will be higher. increase, the overall cost will increase significantly

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