Power control unit and on/off method

Abstract

The invention discloses a power control unit comprising an adapter power supply signal generating unit, an on/off signal generating unit, a power supply holding signal generating unit, an enable signal generating unit and a holding signal terminating unit. The adapter power supply signal generating unit is used for generating adapter power supply signals according to the output voltage of the adapter. The on/off signal generating unit is used for generating the on/off signals when cells supply power. The power supply holding signal generating unit is used for generating power supply holding signals when the cells supply power. The enable signal generating unit is used for generating enable signals according to the adapter power supply signals, on/off signals or power supply holding signalsand for controlling power on, power supply and power down of a power chip. The holding signal terminating unit is used for terminating generation of the power supply holding signals when the cells supply power. The invention also discloses an on method and an off method. The power control unit of the invention can provide stable supply voltage to embedded systems and realizes more complicated on/off power control flows of the terminal products. The power control unit realizes power on, power supply and power down processes of the system through the control of the circuit and the circuit is simple, easy to use, low in cost and high in reliability.

Description

technical field [0001] The present invention relates to the technical field of power management, in particular to a power control device and a switching method. Background technique [0002] With the development of communication electronic technology, there are more and more electronic products with more and more functions; electronic communication products with single function can no longer meet the needs of the market; communication tools with single voice function will gradually be replaced by multi-functional Replaced by electronic products; multifunctional electronic products integrate voice and high-speed data services; for electronic products, especially for electronic products with rich functions, the design of power supply is particularly important; with 3G (3rd Generation , the third generation digital communication) era, there will be more and more wireless access terminal products that integrate high-speed data services. For these multi-functional electronic prod...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a power control device and a switching method to overcome the defect that the power management chip of the communication terminal product in the prior art cannot meet the power management requirements of the embedded controller

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