Huawei Technologies Co., Limited

Shenzhen Sodi Innovation Technologies Co., Ltd

Weiping Song

Jinlong Wang

Zhongshu Zhang

Ling Liu

Shiyong Fu

Houcun Zhu

Yinsheng Ye

Fawen Xu

Wanxiang Ma

Yajie Cai

Xuefeng Tang

Case for mobile telephone

This application discloses a power supply system, including: A first end of a bus capacitor is connected to a first end of a power supply, and a second end of the bus capacitor is connected to a second end of a semiconductor switch device. A first end of the semiconductor switch device is connected to a second end of the power supply. An input end of a power conversion circuit is connected to the bus capacitor. Two ends of a resistor are respectively connected to the first end and the second end of the semiconductor switch device. When the semiconductor switch device is switched off, the power supply supplies power to the bus capacitor by using the resistor. When a voltage of the bus capacitor is greater than a first preset voltage, an auxiliary power supply is powered on and the semiconductor switch device is switched off.

Power supply system, soft-start circuit, and control method

This application relates to a power consumption grading method for a network-based power supply system. The method includes: when it is detected that power overload protection is not triggered, starting a plurality of power modules of a powered device one by one in a specific order until all the plurality of power modules are started or it is detected that the power overload protection is triggered after a specific power module is started; when it is detected that the power overload protection is triggered, selecting, according to the specific order and based on the specific power module, one or more of the plurality of power modules as a power module combination of the powered device; and determining a load power of the powered device and a corresponding power consumption level based on the power module combination.

Network-based power supply system

A powered device (PD) detection device is configured to identify a type of power sourcing equipment. The PD detection device includes a detection circuit and a processing circuit, and the detection circuit is connected to the processing circuit. The detection circuit is configured to: receive hierarchical waveform information sent by the power sourcing equipment, and generate a corresponding first-type signal or a corresponding second-type signal based on the hierarchical waveform information, and is further configured to send the first-type signal or the second-type signal to the processing circuit, where the first-type signal corresponds to first-type power sourcing equipment, and the first-type power sourcing equipment includes at least one of non-standard power sourcing equipment and a direct current adapter. The processing circuit is configured to: receive the first-type signal or the second-type signal, and determine the type of the power sourcing equipment based on the first-type signal or the second-type signal.

Powered device (PD) detection device

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Shenzhen, China

Weiping Song