True wireless Bluetooth earphone charging system with high charging conversion efficiency

Abstract

The invention relates to a true wireless Bluetooth earphone charging system with high charging conversion efficiency. The system comprises a Bluetooth earphone charging box circuit and a Bluetooth earphone circuit, wherein the Bluetooth earphone charging box circuit comprises a first battery, a DC/DC conversion circuit, a first port, a second port, a first communication circuit and a charging box main control circuit, and the first communication circuit is connected with the first port; the Bluetooth earphone circuit comprises a second battery, a second communication circuit, a Bluetooth earphone main control circuit, a third port and a fourth port, and the second communication circuit is connected with the third port; and the charging box main control circuit is connected with the Bluetooth earphone main control circuit through the first communication circuit and the second communication circuit. According to the system, a traditional step-down circuit in a Bluetooth earphone end is omitted, electric energy loss is reduced, and the charging conversion efficiency of an Bluetooth earphone charging box to a Bluetooth earphone is further improved. Moreover, single-line bidirectional communication between the charging box main control circuit and the Bluetooth earphone main control circuit is achieved, no extra communication line is needed, the circuit design cost is reduced, and good economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of a true wireless bluetooth earphone charging system, in particular to a true wireless bluetooth earphone charging system with high charging conversion efficiency. Background technique [0002] In recent years, TWS Bluetooth headsets have become more and more popular, which consist of two headsets plus a charging box. In order to consider portability, the shape of the entire product is getting smaller and smaller, but the battery life requirements are getting longer and longer. Some TWS Bluetooth headsets even use this battery life as a selling point to gain better market recognition and acceptance. [0003] There is generally one-way communication between the existing Bluetooth headset and the charging box. In addition, the current Bluetooth headsets first boost the 3.7 volts in the charging box to 5 volts with DC / DC, and then send them to the earphones. At the earphone end, the 5 volts are converted into...

AI Technical Summary

Problems solved by technology

In the conversion process of this voltage rising and falling, the total electric energy is lost by more than 35%.

[0004] However, the electric energy stored in the battery of the charging box is limited, but in actual use, more than 1 / 3 of the energy will be lost, and it does not meet the energy-saving requirements.

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