Power management apparatus

Abstract

The invention provides a power management apparatus, used for controlling a power supply device to open or close an electronic device. The power management apparatus comprises a power supply, a conversion module including an output pin, an on-off key, a pulse generator, a delay module, a feedback logic gate, a pulse-width generating logic gate, and a switch logic gate. The pulse generator connected to the on-off key and the power supply is used for outputting pulse signals. The delay module connected to the output pin is used for delaying a voltage output from the conversion module. Two input ends of the feedback logic gate are connected to the output pin of the conversion module and the output of the delay module, respectively. Two ends of the pulse-width generating logic gate are connected to the output of the feedback logic gate and the pulse generator, respectively, and the pulse-width generating logic gate is used for generating an adaptive pulse signal. Two ends of the switch logic gate are connected to the output of the pulse-width generating logic gate and the delay module, respectively, and the switch logic gate is used for outputting a logic value to trigger the conversion module to open or close the electronic device, according to the adaptive pulse signal and the delayed voltage output by the conversion module.

Description

technical field [0001] The invention relates to a power management device, in particular to a power management device with a stable switch state. Background technique [0002] The general actuation principle of the switch button of the existing electronic device is to generate a pulse signal by pressing the switch button, and the microcontroller built in the electronic device receives the pulse signal to control the power supply to supply or cut off the power to the electronic device. However, when using a microcontroller as a switch control element, it is necessary to burn the source code of the switch control program into the microcontroller in advance, which is not only complicated, but also costly. Therefore, a switching device that implements power management through hardware design without using a control program is further produced. [0003] The existing method of switching devices that implement power management through hardware is usually: one input end of an XOR l...

AI Technical Summary

Problems solved by technology

However, when the on-off key is pressed for a long time due to external force or damage, the input end of the NAND logic gate connected to the on-off key will be in a high potential state for a long time, so that when the electronic device is turned on, the The other input terminal of the NAND logic gate will also generate a high potential, so that the output terminal of the NAND gate will correspondingly generate a low potential to stop the power supply to the electronic device, causing the electronic device to be closed by mistake

If the switch key is still in the pressed state at this time, so that the input terminal of the NAND gate continues to maintain a logic value of 1, and the other input terminal produces a logic 0 because the power supply stops supplying power to the electronic device, then the output terminal will output a high potential again. (i.e. logic 1) and restart the electronic device, so that the electronic device will be turned on and off repeatedly

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