Overvoltage protection circuit, charging circuit and related methods and terminal equipment

• Main Author: YI PENGCHENG
• Format: Patent
• Language: Chinese; English
• Published: 02.03.2018
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides an overvoltage protection circuit, a charging circuit and related methods and terminal equipment. The voltage value of a device to be protected in a battery power supply networkcan be detected in the battery charging process. If the voltage value of the device to be protected is ensured not to be lower than the preset voltage threshold, the voltage amplitude of the direct current supplied to the battery power supply network can be reduced according to the preset step and the objective of stabilizing the voltage of the device to be protected to be lower than the upper limit of the bearable voltage can be achieved so that the problem that the electronic parts and components in the battery power supply network are liable to be burned by overvoltage in the battery charging process can be avoided and the charging efficiency can be ensured as much as possible. 种过压保护电路、充电电路以及相关方法和终端设备，可在电池充电过程中，检测电池供电网络中的待保护器件的电压值，若确定所述待保护器件的电压值不低于设定电压阈值，则以设定步长减小提供给电池供电网络的直流电的电压幅值，以达到将待保护器件的电压稳定在其所能承受的电压上限以下的目