Charging circuit with protective function and charger with the same

• Main Authors: MO XINHUA, QIN GUOBING
• Format: Patent
• Language: Chinese; English
• Published: 25.12.2018
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention relates to the technical field of charging, which relates to a charging circuit with a protective function and a charger. The charging circuit comprises a second comparison circuit, a first control circuit, a second control circuit and a main charging circuit. The main charging circuit includes a first power supply, a first switching device, a second switching device, a sampling resistor and a battery, and the second control circuit and the second comparison circuit jointly control on-off of the second switching device. The first power source is capable of charging the battery; the second comparison circuit is electrically connected with the main charging circuit and the second switching device respectively. When the corresponding current exceeds the limit value, the second comparison circuit controls the second switching device to open the circuit. The first control circuit controls the on-off of the first switching device according to the current flowing through the sampling resistor. Compared