交替式双路电源自动切换装置

Automatic switchover device for alternating double power supply

Abstract

The utility model relates to an automatic switchover device for a power supply, in particular to an automatic switchover device for an alternating double power supply. The device comprises an MCU control circuit, an automatic switchover circuit of input power source, a power supply circuit of low voltage power supply, a liquid crystal display circuit and a keyboard circuit, wherein the input terminal of the automatic switchover circuit of the input power source is connected with a direct current supply and a battery; the output terminal thereof is connected with the power supply circuit of the low voltage power supply; and the power supply circuit of the low voltage power supply, the liquid crystal display circuit and the keyboard circuit are all connected with the MCU control circuit. The utility model adopts a method that two low voltage power supplies operate alternately, i.e. when one low voltage power supply operates, the other is disconnected and dissipates heat; the operation time and the intermittence time of the power supplies can be set freely, thereby improving the heat radiating efficiency of the power supplies; moreover, small radiating fins are assembled on LDO devices used for the low voltage power supplies, so that the whole power feeding equipment occupies smaller space and can be designed into a miniature product.
本实用新型是一种电源自动切换装置,具体为一种交替式双路电源自动切换装置。本装置包括MCU控制电路、输入电源自动切换电路、低压电源供电电路、液晶显示电路和键盘电路。输入电源自动切换电路的输入端与直流电源和电池相连,输出端与低压电源供电电路相连。低压电源供电电路、液晶显示电路和键盘电路均与MCU控制电路相连。本实用新型采用两路低压电源交替工作的方式,一路低压电源工作时,另一路低压电源断电散热,电源的工作时间和间歇时间自由设置,这种设计提高了电源的散热效率,低压电源所用的LDO器件只需配置小型散热片即可,整个供电装置占用空间较少,能够设计为微型产品。

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