Hybrid charge-discharge circuit, power supply chip and electronic device

Abstract

This application belongs to the field of electronic circuits and provides a hybrid charging and discharging circuit, a power supply chip, and an electronic device. The circuit includes a first switching module, a second switching module, a third switching module, and an inductor module. The first switching module is connected to the inductor module, the positive terminal of the second power supply, and the positive terminal of the first power supply. The second switching module is connected to the negative terminal of the second power supply and the third switching module. The third switching module is grounded. The inductor module is connected to one end of the output capacitor and the load, or to one end of the output capacitor and the power supply circuit. When the circuit operates in boost mode, in the first stage, the first and second power supplies are connected in parallel and then supply power to the load through the inductor module; in the second stage, the first and second power supplies are connected in series and then supply power to the load through the inductor module. The first and second stages alternate conduction at a certain period. This application solves the problems of limited current capability and poor output dynamic characteristics existing in boost-shoot-through converters.

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