Startup and shutdown circuit

A technology of switching on and off circuits and circuits, which is applied in the direction of electronic switches, circuit devices, battery circuit devices, etc., and can solve problems such as low-power processors in working state, mechanical switches with large volume, and terminal equipment that cannot be turned on normally.

Inactive Publication Date: 2021-02-12
ZHEJIANG HUACHUANG VISION TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large size of the mechanical switch, it cannot be applied to the miniaturized terminal equipment; secondly, the lithium battery power is managed by the low-power processor, but when the terminal equipment is turned off, the low-power p...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Startup and shutdown circuit
  • Startup and shutdown circuit
  • Startup and shutdown circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] At present, lithium batteries are widely used in various terminal devices due to their excellent characteristics, such as fast charging speed and long service life. However, the lithium battery itself also has certain defects, that is, if it is not charged for a long time, the power of the lithium battery itself will continue to be lost. Once the lithium battery itself is in an over-discharge state (that is, the stored power is exhausted), then It cannot be charged normally. Usually, when the terminal device is turned on, the user can easily detect the power usage of the lithium battery, and charge the terminal device in time when the lithium battery power is low. However, if the terminal device is turned off, the user cannot know the power...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The embodiment of the invention provides a startup and shutdown circuit, and the startup and shutdown circuit reduces the power loss of a lithium battery as much as possible through cutting off the connection between a lithium battery power supply and a microcontroller on the basis of meeting the normal startup and shutdown demands of terminal equipment. The circuit comprises a switch module usedfor generating a first signal according to a first pressing operation; a microcontroller which sets the main circuit module to be in a power-down state according to the first signal and sends a secondsignal to the power management module, wherein the second signal is used for disconnecting the power management module from the microcontroller; a switch module which is used for generating a third signal within the duration of the second pressing operation; a power supply management module which supplies power to the microcontroller according to the third signal; wherein the microcontroller after power-on periodically generates a fourth signal, the main circuit module is set to be in a power-on state, and the fourth signal is used for controlling the power management module to continue to supply power to the microcontroller after the second pressing operation is cancelled.

Description

technical field [0001] The invention relates to the technical field of embedded devices, in particular to a switch circuit. Background technique [0002] At present, due to the advantages of fast charging speed and long service life, lithium batteries are widely used in various terminal devices, such as smart wearable devices. In the prior art, lithium battery power is mainly managed in two ways. First, manage the lithium battery power supply through a mechanical switch, which can not only ensure the normal power on and off operation of the terminal equipment, but also disconnect the lithium battery power supply from the external circuit when the terminal equipment is in the shutdown state, thereby reducing the power supply in the shutdown state. Circuit loss of lithium batteries. However, due to the large size of the mechanical switch, it cannot be applied to the miniaturized terminal equipment; secondly, the lithium battery power is managed by the low-power processor, bu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02J7/00G06F1/3237H03K17/96
CPCG06F1/3237H02J7/0029H02J7/0068H03K17/964H02J7/0071H02J7/007182
Inventor 童友连杨国全曹亚曦王克彦
Owner ZHEJIANG HUACHUANG VISION TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap