Dual-PMU (power management unit) power supplying system, power supplying method and mobile terminal

Abstract

The invention discloses a dual-PMU (power management unit) power supplying system, a power supplying method and a mobile terminal. Two PMUs are arranged in a system circuit for supplying power for a processor; the second PMU generates an inner core power supply by an internally integrated FT-type DC (direct current)-DC converter and supplies power for the integrated inner core of the processor; other paths of work power supplies needed by the processor are generated and provided by the first PMU through an internally integrated HF-type DC-DC converter. Aiming at the two types of work power supplies: the large-current power supply for the inner core and the small-current power supply for other loads, needed by the processor, the design mode of adopting the two PMUs to respectively supply power is provided, and while the integrity design demands of the power supply are met, the two PMUs and the processor can be distributed on a PCB (printed circuit board ) as dispersion as possible, so the radiating demands of the system is considered, the design mode is particularly suitable for mobile terminal products with smaller sizes, such as a mobile phone, and the board distribution design of the PCB is facilitated.

Description

technical field [0001] The invention belongs to the technical field of power supply control, and in particular relates to a control system for providing direct current power supply to a processor and a mobile terminal product designed using the power supply system. Background technique [0002] With the continuous increase of the main frequency of smart phones, more and more cores are integrated in the processors used inside, and the power consumption of mobile phones is also gradually increasing, which leads to the continuous increase of the heat generation of mobile phones, and at the same time Higher requirements are put forward for the integrity design of the system power supply. Therefore, mobile phone heating and power integrity issues have become key factors that determine the success or failure of mobile phone project design. [0003] In existing mobile phone designs, a single PMU (power management chip) is used to power the processor inside the mobile phone. In t...

AI Technical Summary

Problems solved by technology

For the mobile phone system circuit, the PMU and the processor are the main heat-generating components. If they are arranged adjacent to each other on the PCB, the heat-generating components will be concentrated, which does not meet the heat dissipation requirements of the system.

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