Power managing method and circuit for main system open/stand by management

Abstract

Present invention discloses power supply management method and circuit for main system turn on / standby management. It contains power supply management circuit receiving instruction, reading system state flag bit meaning current system being starting up or standby state, judging system state, if system being starting up state then power supply management circuit sending standby signal, main system writing status flag status flag bit as standby state, power supply management circuit switching off mains power supply control switch to make main system entering standby state, if system being standby state then power supply management circuit sending starting up, power supply management circuit switching-on mains power supply control switch, main system writing status flag bit as starting up state to make main system entering starting up state. In standby state, system working power supply is cut off completely, power supply management module can identify automatically awakening signal to awaken total system, to make electronic products standby power consumption more low and reducing use-cost.

Description

【Technical field】 [0001] The invention relates to a power supply management circuit and method applied to various electronic products. 【Background technique】 [0002] The energy crisis around the world has made the international market have stricter restrictions on the energy consumption indicators of home appliances. As my country is the manufacturing center of home appliances in the world, energy saving is becoming a stepping stone and an important means to participate in international market competition. It is understood that the average growth rate of my country's electricity consumption has exceeded 15% for many years, and the number of TV sets in my country alone is as high as 400 million. The electricity is as high as 2.92 billion kWh, which is equivalent to 1 / 3 of the annual power generation of Daya Bay Nuclear Power Plant. The energy consumption of color TVs in my country accounts for about 10% of the total electricity consumption of our residents. Most of the old...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, home appliances, especially TV products, often require the main processor MCU and its peripheral circuits in the system not to be powered off during standby, otherwise they cannot be woken up by remote control or keying signals, and some may even be a main The MCU core is embedded in the application-specific integrated circuit (ASIC) chip, which may require more voltage and more circuit units to still work normally in standby mode, which will result in higher standby power consumption

Therefore, in the prior art, the standby power consumption of electronic products cannot be reduced too much

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