Power supply control device for electronic installation equipped with multiple batteries

Abstract

The power supply controller consists of transistor, reference voltage circuit and voltage comparator circuit. The transistor is connected to battery and the electronic equipment; the reference voltage circuit is connected to the electronic equipment and the voltage comparator circuit for outputting regulated load voltage, which is the difference between the load voltage and the reference voltageand has the uncertainty caused by the offset voltage of the voltage comparator circuit eliminated; and the voltage comparator circuit is connected to the reference voltage circuit, the battery and the transistor to control the transistor to be switched on when the power supply voltage is higher than the regulated load voltage or switched off otherwise. The present invention aims at providing oneequivalent ideal diode connected serially between the battery and the electronic equipment.

Description

(1) Technical field [0001] The present invention relates to a power supply control device, and more particularly to a power supply control device for an electronic device equipped with multiple batteries. (2) Background technology [0002] With the rapid development of science and technology, the advent of digital electronic products has brought more convenient life to human beings. The rapid development of various portable devices, such as mobile phones, notebook computers or personal digital assistants (Personal Digital Assistance, PDA), has greatly improved the convenience of human life and the efficiency of work. [0003] The portable device can completely rely on its equipped battery as a power source to provide the required power without an external power supply. The working time of a portable device without an external power source depends on how long the battery can supply power continuously and stably. At present, a plurality of battery packs are generally used to...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the above power supply control device is that when the diode is turned on, the two poles of the diode will have a voltage drop of about 0.35~0.7 volts

In addition, if the power supply voltage of the battery is not high at that time, the above-mentioned method may cause the load to mistakenly think that the power of the battery is insufficient, and even forcibly shut down, resulting in the loss of user data and inconvenience in use

Also, if a new battery is added as a new power source for the load, it is necessary to use a software program to reset the action of the microcontroller, which is more difficult

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