Direct current charging protection circuit

• Main Authors: OU WEICHANG, YANG GUANGMING, HU XIANQUAN, HUANG PENG, TANG ZAIJUN
• Format: Patent
• Language: Chinese; English
• Published: 22.09.2023
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention provides a direct current charging protection circuit which comprises a second MOS tube used for detecting an input voltage and judging a voltage input mode when the VIN end has the input voltage; wherein the voltage input mode comprises an undervoltage input mode, a normal input mode and an overvoltage input mode; the grid electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, and the first MOS tube is used for controlling the VBUS end to supply power in different voltage input modes; the positive electrode of the TVS diode is connected with the grid electrode of the second MOS tube, and the TVS diode is used for preventing the VIN end from inputting surge voltage; the first voltage division circuit is formed by connecting a first resistor and a second resistor in series, the non-series-connection end of the first resistor is connected with the grid electrode of the first MOS tube, the non-series-connection end of the second resistor is connected with the