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Circuit for forced shutdown

A technology for controlling circuits and circuits, applied in circuits, transistors, semiconductor devices, etc., can solve the problem that MCU cannot be shut down, and achieve the effect of fast startup

Inactive Publication Date: 2010-01-13
TCL TECH ELECTRONICS (HUIZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a forced shutdown circuit, which aims to solve the shortcoming that the MCU cannot be shut down after the MCU crashes in the prior art

Method used

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  • Circuit for forced shutdown
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Embodiment Construction

[0015] 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. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] The forced shutdown circuit provided by the present invention does not need to be controlled by software, but uses hardware discrete components to realize the forced shutdown of the control system, and solve the problem that the system cannot be shut down normally due to uncontrollable shutdown of the MCU. see figure 2 As shown in, the preferred embodiment of the present invention utilizes the switching characteristics of semiconductor discrete components to control the semiconductor discrete component control circuit (electronic switch effect) through the rebound switch of the system power...

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Abstract

The invention provides a circuit for forced shutdown, comprising a rebound switch, a semiconductor discrete component control circuit playing a role of an electronic switch and a RC delay circuit controlling the forced shutdown time. The circuit for forced shutdown can realize forced shutdown by utilizing switching characteristics of the semiconductor discrete component control circuit and the RC delay circuit, and enable a system to fast start through a proper discharge circuit.

Description

technical field [0001] The invention relates to a shutdown circuit, in particular to a forced shutdown circuit of a consumer electronic product with a built-in battery. Background technique [0002] At present, most consumer electronic products with built-in batteries use MCU (microprocessor) software to control the system for forced shutdown when the system crashes. The principle is to send a shutdown command through an external circuit to instruct the MCU. After the MCU receives the command, it sends Shutdown command to control the shutdown of the entire system, for example figure 1 In the existing switching circuit shown in , Battery_IN is the battery power supply terminal, and the normal power-on state of the system is as follows: when the rebound switch SW is momentarily connected to the ground, the voltage of the diode D2, the resistor R6, and the resistor R7 is instantly pulled Low, according to the switching principle of the triode PNP, the triode Q3 is turned on in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/60
Inventor 陈垣年
Owner TCL TECH ELECTRONICS (HUIZHOU) CO LTD