Protection system for intelligent sound box during sudden power failure

A technology of smart speakers and protection systems, applied in electrical components, circuit devices, emergency power supply arrangements, etc., can solve problems such as battery over-discharge and battery voltage fluctuations

Inactive Publication Date: 2021-02-02
北京君正集成电路股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to solve the problem of battery over-discharge protection caused by battery voltage fluctuations when the battery power is low, resulting in sudden power failure without prompting, and to improve customer experience

Method used

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  • Protection system for intelligent sound box during sudden power failure

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Embodiment Construction

[0018] At present, commonly used technical terms in this technical field include:

[0019] PMU: power management unit, power management unit, integrates multiple DC / DC and LDO, battery charging charger, ADC for detecting battery voltage and other circuits.

[0020] ADC: Analog to digital converter, analog to digital converter.

[0021] DC to DC converter: A direct current-direct current converter, also known as a DC-DC converter, can convert a direct current (DC) power supply into a direct current (or near direct current) power supply of a different voltage. Its power can range from very small (small batteries) to very large (high voltage power conversion).

[0022] LDO: low dropout voltage regulator, low-dropout linear regulator, as the name suggests, is a linear regulator that can only be used in step-down applications. That is, the output voltage must be less than the input voltage.

[0023] Battery over-discharge protection voltage: In order to prevent the battery from ...

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PUM

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Abstract

The invention provides a protection system for an intelligent sound box in case of sudden power failure. The protection system comprises a loudspeaker of the intelligent sound box, and a PMU connectedwith the battery of the intelligent sound box, and a DC / DC power supply chip connected with the PMU, wherein the loudspeaker of the intelligent sound box is connected with the battery of the intelligent sound box, the input of the DC / DC power supply chip is a battery voltage, the output of the DC / DC power supply chip is a 5V voltage output, and the 5V voltage output is connected to USB_5V of thePMU; when the battery is fully charged, the DC / DC power supply chip does not work, no 5V voltage is output; when the battery voltage is low, an ADC detects that the battery voltage enters an alarm voltage, the system enables the DC / DC power supply chip to output the 5V voltage according to an ADC detection result, the USB_5V of the PMU is electrified, the PMU is considered to be connected to an external power supply and is automatically and seamlessly switch in the USB_5V to be powered by the USB_5V, and at this moment, the loudspeaker can normally emit prompt sound, so that a user is promptedthat the power of the battery is low and the intelligent sound box is about to shut down.

Description

technical field [0001] The invention relates to a power-down protection system, in particular to a protection system for a smart speaker when power is suddenly lost. Background technique [0002] With the continuous development of science and technology, especially the development of computer technology, more and more smart electronic products, such as smart speakers, are used in people's daily life. More and more smart speaker technologies have given users a better experience and provided more convenient services. At present, smart speakers are a very popular electronic product in the current market, and the power supply scheme of most smart speakers adopts the PMU solution. PMU is a power management unit, which integrates multiple DC / DC and LDO, battery charging charger, ADC for detecting battery voltage and other circuits. The power detection of the battery is realized by detecting the voltage of the battery through the ADC. When the detected battery voltage is 4.2V, t...

Claims

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Application Information

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IPC IPC(8): H02J9/06
CPCH02J9/061
Inventor 任科飞
Owner 北京君正集成电路股份有限公司
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