Method for regulating dynamic voltage frequency in power supply management technique

A technology of frequency adjustment and dynamic voltage, which is applied in the field of dynamic voltage frequency adjustment, can solve the problems of too many system voltage rails, inaccurate and efficient, and unable to collect load status, etc., and achieve the effect of improving the system usage time and improving the short usage time

Inactive Publication Date: 2008-10-08
上海摩飞电子科技有限公司
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AI Technical Summary

Problems solved by technology

As a result, the system has more voltage rails and consumes more power.
Most of the current handheld devices require different working modes such as working mode and sleep mode. In terms of power management, designers also put forward higher requirements; they cannot collect the load status of the system, and the energy saving effect is not significa

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  • Method for regulating dynamic voltage frequency in power supply management technique

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0027] The power consumption of any device is composed of two parts, namely dynamic power consumption and static power consumption:

[0028] P (total) = P (dynamic) + P (static)

[0029] In system active mode, dynamic power consumption should be considered, such as when digital signals change, when analog circuits change state, etc. due to operational changes that occur because the device needs to perform user functions. The dynamic power consumption is defined as follows:

[0030] P (dynamic) = C (capacitance) × V 2 (voltage)×F(frequency)

[0031] In the formula, the voltage is squared, so it has a greater effect on the magnitude of the dynamic power consumption and has a greater impact on the battery life.

[0032] On the other hand, the dynamic power consumption is much larger than the static power consumption in the device running mode, but ...

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Abstract

The invention relates to a dynamic voltage frequency adjustment method in the power management technology, which comprises steps: collecting different hardware signals; writing a hardware dynamic voltage frequency adjustment controller and a corresponding register of a CPU loading log; reading CPU loading log information via an operating system/software drive, and inputting the information into an interface module of the operating system/software drive after analyzing; and reading dynamic processing temperature compensation, the hardware dynamic voltage frequency adjustment controller, the information processed by the interface module of the operating system/software drive; outputting to a corresponding frequency adjustment and voltage adjustment unit via related algorithm analysis, so as to complete adjusting system real time dynamic voltage frequency. The invention adjusts working frequency according to system performance demands, and correspondingly reduces system working voltage and reduces dynamic power dissipation. The invention greatly improves shortcomings of short service life of the battery, bad system stability and reliability brought in by the traditional simple power management technology. The invention can use various embedded system devices such as the portable multimedia recording and playing device, and smart phone.

Description

【Technical field】 [0001] The invention relates to a power management technology, in particular to a dynamic voltage frequency adjustment method in the power management technology. 【Background technique】 [0002] The demand for digital power has risen sharply recently. Cutting-edge semiconductor process technology not only makes devices smaller and faster, they also require lower (higher density) supply voltage and higher supply current; at the same time, the function of the final system continues to increase, volume and average selling price is continuously declining. These factors are forcing power-supply designers to develop more accurate, faster-responsive, more efficient, smaller and lower-cost power supplies over generations. Faced with these problems, traditional analog control solutions are gradually becoming helpless. [0003] Power supply design is a major problem in the design of handheld devices, and it is also a major bottleneck that limits the size reduction ...

Claims

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Application Information

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IPC IPC(8): G06F1/26G06F1/32
Inventor 张晟石万群廖林
Owner 上海摩飞电子科技有限公司
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