Huawei Technologies Co., Limited

Guolei Yu

Zhiqiang Xiang

Shuchao Song

Junliang Qin

Guiping Zhang

Xuyang Wu

The three-level direct current converter includes: a flying capacitor, a plurality of switch groups, a drive circuit, and a control circuit. The control circuit includes at least an on-time generator. When a voltage on the flying capacitor deviates from a half of a power supply voltage, the on-time generator changes a charging current of a capacitor of the on-time generator to adjust an output on-time signal, and outputs the on-time signal to the drive circuit. The drive circuit generates a drive pulse signal based on the on-time signal to drive switch statuses of the plurality of switch groups, to adjust charging time and discharging time of the flying capacitor, where an absolute value of a difference between the voltage on the flying capacitor and the half of the power supply voltage is less than or equal to a preset threshold.

Three-level direct current converter, power supply system, and chip

A multi-level direct current converter includes a direct current conversion unit, a switching unit, a voltage management unit, and a controller. The direct current conversion unit includes a flying capacitor, a first power transistor, and a second power transistor. A first end of the first power transistor is connected to a voltage input end of the multi-level direct current converter, a second end of the first power transistor is connected to a first end of the second power transistor by using the flying capacitor, and a second end of the second power transistor is connected to a reference ground.

Multi-level direct current converter and power supply system

A DC/DC converter includes a soft start overshoot prevention mechanism. The DC/DC converter includes a DC/DC conversion circuit, an overshoot detection apparatus, a pulse width modulation generator, an error amplifier, and an integration circuit connected to an output port of the error amplifier. The integration circuit is configured to perform integration processing on a difference between a reference voltage and an output voltage of the DC/DC conversion circuit, and control an amplitude of an amplified voltage that is input by the error amplifier to the pulse width modulation generator. The overshoot detection apparatus obtains an operating status parameter of the DC/DC converter, and controls, when the operating status parameter of the DC/DC converter meets an operating status parameter requirement, the integration circuit to discharge.

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Dongguan, China

Guolei Yu