Forced shutdown circuit of portable consumer electronic product
An electronic product and consumer technology, applied in the field of forced shutdown circuit, can solve problems such as abnormal shutdown, current consumption, program runaway, etc., and achieve the effects of simplifying design, improving reliability, and avoiding misoperation
Inactive Publication Date: 2012-04-11
SHANGHAI JADE TECH
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Problems solved by technology
[0002] In daily life, portable consumer electronic products such as notebooks, MIDs (mobile Internet devices), netbooks, and mobile phones often crash due to improper operation or imperfect software, or fail to turn on repeatedly due to some reasons. Normal operation phenomenon, at this time, it is necessary to perform a forced shutdown or reset; the usual shutdown function is realized through the chip, but there is no real shutdown, the shutdown chip belongs to the sleep circuit, and is still consuming current
Sometimes the shutdown chip will also cause the internal program to run away due to some reasons, so it cannot be shut down normally, and the battery can only be removed and powered on again.
This caused a lot of unnecessary trouble to the user
Method used
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[0018] In one embodiment, the forced shutdown circuit is as Figure 1-3 shown.
[0019] A resistor R18 is connected between the drain and the gate of the P-channel MOS transistor Q7, and the source of the P-channel MOS transistor Q7 serves as the output terminal of the DC voltage, ie, the DC_OUT terminal.
[0020] The output signal PWRR_ON# is jointly controlled by two NPN transistors Q1 and Q2. When the transistor Q1 or transistor Q2 is turned on, the PWRR_ON# signal level output by the collector will be pulled down to become a low-level signal, P channel The MOS tube Q7 is turned on, and the DC power supply will be connected. Only when the two transistors Q1 and Q2 are turned off at the same time, the output signal PWRR_ON# will be suspended and pulled high by the pull-up resistor R10, the P-channel MOS transistor Q7 will be turned off, and the DC power supply will be disconnected.
[0021] combine Figure 4 As shown, the power-on and start-up control process of the forced...
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The invention discloses a forced shutdown circuit of a portable consumer electronic product. The input end of the circuit is controlled synchronously by two touch key switches, wherein one is a power supply key SW1 and the other is an arbitrary function key SW2. When the power supply key switch SW1 and the key switch SW2 are pressed down synchronously, triodes Q3 and Q4 are turned off synchronously, and a triode Q5 is connected, so that the levels of power off signals PWR_OFF1 and PWR_OFF2 functioned on anodes of diodes D1 and D2 and basic electrodes of triodes Q1 and 2 are low levels synchronously; the triodes Q1 and Q2 are closed synchronously; a P channel MOS (metal oxide semiconductor) pipe Q7 is shut off, and the power supply is disconnected. With the adoption of the circuit provided by the invention, the purpose of shutdown can be realized through forced power down, and error operation can be avoided; meanwhile, the circuit can be conveniently added in the circuit of the portable consumer electronic product. Moreover, as the circuit provided by the invention adopts separate electronic element resistors, capacitors, diodes and triodes, the cost is reduced, the reliability is high and the operation is simple and practicable.
Description
technical field [0001] The invention relates to a forced shutdown circuit of portable consumer electronic products, which can be applied to all portable consumer electronic products, no matter battery-powered products or products using only DC power supply. Background technique [0002] In daily life, notebooks, MIDs (mobile Internet devices), netbooks, mobile phones and other portable consumer electronics products often crash due to improper operation or imperfect software, or after repeated failures to boot due to some reasons In normal operation, forced shutdown or reset is required; the usual shutdown function is implemented by the chip, but there is no real shutdown. The shutdown chip belongs to the sleep circuit and still consumes current. Sometimes the shutdown chip will also cause the internal program to run away due to some reasons, so it cannot be shut down normally, and the battery can only be removed and powered on again. This causes a lot of unnecessary trouble...
Claims
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Inventor 欧阳合汪安顺谢镇澧
Owner SHANGHAI JADE TECH