Huawei Technologies Co., Limited

Hisilicon Technologies Co., Ltd.

Caofei Heng

Jianping Wang

Ming Li

Wei Wu

Xin Liu

Chen Huang

Pengfei Wang

Hang Cheng

Yi Wang

Kun Wu

Zhangrong Hu

A switch-mode power supply includes a first switch circuit, at least one second switch circuit, a switch control circuit, a first inductor switching circuit, a coupled inductor, a voltage input end, and a voltage output end. The coupled inductor in the switch-mode power supply may be connected to the first switch circuit, to implement signal transmission between the coupled inductor and the first switch circuit. Signal transmission between the coupled inductor and the second switch circuit may be implemented under control of the first inductor switching circuit. Alternatively, the signal transmission between the coupled inductor and the second switch circuit may be disconnected under the control of the first inductor switching circuit.

Switch-mode power supply

Embodiments of the present invention disclose a power supply conversion apparatus, where a control unit generates a corresponding control signal according to a received high level pulse width modulation signal, to control a first PMOS transistor Q, a second PMOS transistor Q, and a second NMOS transistor Qto be turned off successively, and then to make a first NMOS transistor Qconducted, which makes a voltage at a second end of a bootstrap capacitor to rise from ground potential to a PVDD, so that a voltage at a first end of the bootstrap capacitor rises to a PVDD+AVDD as the voltage at the second end rises, and a gate turn-on voltage of the first NMOS transistor Qreaches the PVDD+AVDD.

Power supply conversion apparatus with bootstrap unit

Embodiments of the present invention provide a charging and power supplying circuit, method and application device, which relate to the field of smart charging, so as to improve efficiencies of battery charging and system power supplying. The charging and power supplying circuit includes a power supplying tributary and a charging tributary. An end of the power supplying tributary is connected to a power supply, and another end is connected to a system. An end of the charging tributary is connected to the power supply, and another end is connected to a battery. A first transistor, a second transistor, a third transistor, a first amplifier, a second amplifier, a third amplifier, a fourth amplifier, a first comparator, a second comparator, a charging controller, a logical switch, an adder and a first control module are connected to the power supplying tributary and the charging tributary.

Charging and power supplying circuit, method and application device

Growing community of inventors

Chengdu, China

Caofei Heng