Switching power supply controlled by negative voltage

A negative pressure control and negative pressure technology, which is applied in the electronic field, can solve problems such as power consumption, high cost of the scheme, and unsuitable product popularization, and achieve the effect of strong reliability and not easy to be damaged
CN106936169AInactive Publication Date: 2017-07-07CHONGQING NINGLAI SCI & TRADE
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING NINGLAI SCI & TRADE
Publication Date
2017-07-07
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a switching power supply controlled by negative voltage, which belongs to the technical field of electronics. The switching power supply controlled by negative voltage comprises a lightning protection unit, a constant voltage and constant current unit, a battery unit, a thyristor switching unit, a control unit, a negative voltage unit, an AC working unit and an AC backup unit, and is a dual power supply with mains supply matched with the battery. The constant voltage and constant current unit forms an independent floating charge branch for the battery, the floating charge voltage and the floating charge constant current can be determined according to requirements of the battery, and floating charge achieves great scientization. When the mains supply is energized, the AC working unit and the backup unit provide current for a load, in the two units, active components are formed by high-reverse voltage triodes, the working mode is to provide normal current by the AC work unit, when the AC work unit fails, the backup unit is automatically switched. In the case of no mains supply, the matched battery is automatically switched for power supply, the switched active component is a thyristor, and as the negative voltage is adopted, the control is reliable. Good switching features are realized.
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Description

technical field

[0001] The invention belongs to the field of electronic technology. Background technique

[0002] The voltage regulator is an important part of electronic products, and its excellent performance is directly related to the overall performance, so there are many excellent voltage regulator integrated circuits, such as 78 series, 79 series and so on. Although the above-mentioned integrated series have many advantages, they still cannot meet the ever-changing needs.

[0003] For example, the company has applied for several products related to security equipment. The products of these devices have very high requirements on the power supply, which is far higher than that of ordinary household appliances, and the traditional design scheme is not competent. The reasons are as follows:

[0004] One is that the power supply is often an electrical appliance, the key part that is most likely to fail, and it is the same for ordinary household appliances. This is espec...

Claims

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