CN202978408U - Double-power-supply automatic switching circuit - Google Patents

Double-power-supply automatic switching circuit Download PDF

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Publication number
CN202978408U
CN202978408U CN 201220450227 CN201220450227U CN202978408U CN 202978408 U CN202978408 U CN 202978408U CN 201220450227 CN201220450227 CN 201220450227 CN 201220450227 U CN201220450227 U CN 201220450227U CN 202978408 U CN202978408 U CN 202978408U
Authority
CN
China
Prior art keywords
power supply
pin
power
thresholding
double
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220450227
Other languages
Chinese (zh)
Inventor
郭继全
夏锐
龙建祥
相康康
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LINBO TECHNOLOGY GROUP CO., LTD.
Original Assignee
Lingbu Science And Technology Co Ltd Shenzhen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lingbu Science And Technology Co Ltd Shenzhen filed Critical Lingbu Science And Technology Co Ltd Shenzhen
Priority to CN 201220450227 priority Critical patent/CN202978408U/en
Application granted granted Critical
Publication of CN202978408U publication Critical patent/CN202978408U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a double-power-supply automatic switching circuit which comprises a main power supply and an auxiliary power supply. The double-power-supply automatic switching circuit further comprises a switching element and an on-off element which are connected with the main power supply and the auxiliary power supply. The double-power-supply automatic switching circuit provided by the utility model can ensure automatic switching to the other normal power supply when the currently used power supply fails, thereby ensuring continuous power supply to the system.

Description

A kind of double supply automatic switch-over circuit
Technical field
The utility model relates to a kind of double supply automatic switch-over circuit.
Background technology
Along with the development of science and technology and the growth of national economy, a large amount of power electronic equipments and other nonlinear-load are used widely in industrial production, cause the quality of power supply of electric power system to be polluted, and the quality of power supply has become one of object of domestic and international common concern.Power quality monitoring device can provide reliable basis for the scientific management of improving the quality of power supply and electric energy.Meanwhile, people are also more and more higher to the requirement of continuous power supply.The continuous power supply of power quality monitoring device power supply has been subject to showing great attention to of industry.
In prior art, often adopt ups power power supply, when the civil power input was normal, UPS was supplied to load to use after with the civil power voltage stabilizing, and the UPS of this moment is exactly an electric main pressurizer, and it also charges to self-contained battery simultaneously; When commercial power interruption (accident interruption), with the electric energy of self-contained battery, the method for changing by inversion continues supply 220V alternating current to load to UPS, load is kept worked and protect the load soft and hardware not to be damaged immediately.
The shortcoming of this prior art is:
1, cost is high;
2, hold time short;
3, be subject to electric network thunder and lightning, superpressure, low pressure, surge, spike interference;
When input voltage is higher or on the low side, namely transfer battery discharging to, and China's electrical network situation is usually relatively poor, can cause that storage battery frequently discharges when 4, UPS moves, shortens the life of storage battery.
The utility model content
For solving above problem, the utility model provides a kind of double supply automatic switch-over circuit.
The utility model provides a kind of double supply automatic switch-over circuit, comprises main power source and stand-by power supply, and described double supply automatic switch-over circuit also comprises switching device and the switch element that is connected with described main power source and stand-by power supply.
In double supply automatic switch-over circuit described in the utility model, described switching device is integrated circuit unit, described integrated circuit unit has the first power pins, the first thresholding is controlled pin, second source pin, the second thresholding control pin, thresholding pin, described main power source connects described the first power pins and the first thresholding is controlled pin, and described stand-by power supply connects described second source pin and the second thresholding is controlled pin.
In double supply automatic switch-over circuit described in the utility model, described switch element is complementary metal oxide semiconductors (CMOS), described thresholding pin connects the grid of described complementary metal oxide semiconductors (CMOS), described second source pin connects the source electrode of described complementary metal oxide semiconductors (CMOS), and described stand-by power supply connects the drain electrode of described complementary metal oxide semiconductors (CMOS).
A kind of double supply automatic switch-over circuit of the present utility model has following beneficial effect:
Adopt double supply automatic switch-over circuit can guarantee that the power supply that is using on certain road can automatically switch on other normal power source when breaking down, guarantee the continuous power supply of system.
Description of drawings
Fig. 1 is the equivalent circuit diagram of a kind of double supply automatic switch-over circuit of the utility model.
Embodiment
Can further understand the utility model by specific embodiment of the utility model given below, but they not to restriction of the present utility model.Some nonessential improvement and adjustment for those skilled in the art does according to above-mentioned utility model content also are considered as dropping in protection range of the present utility model.
See also Fig. 1, embodiment of the present utility model, a kind of double supply automatic switch-over circuit comprises main power source V1 and stand-by power supply V2, and double supply automatic switch-over circuit also comprises switching device and the switch element that is connected with main power source V1 and stand-by power supply V2.
Further, switching device is integrated circuit unit, integrated circuit unit has the first power pins VCC1, the first thresholding is controlled pin SETV, second source pin VCC2, the second thresholding control pin SETD, thresholding pin GATE, main power source V1 connects the first power pins VCC1 and the first thresholding is controlled pin SETV, and stand-by power supply V2 connects second source pin VCC2 and the second thresholding is controlled pin SETD.
Further, switch element is complementary metal oxide semiconductors (CMOS), thresholding pin GATE connects the grid of described complementary metal oxide semiconductors (CMOS), and second source pin VCC2 connects the source electrode of complementary metal oxide semiconductors (CMOS), and stand-by power supply V2 connects the drain electrode of complementary metal oxide semiconductors (CMOS).
The below describes in detail the present embodiment:
The design has the two-way power supply, and one the tunnel is main power source V1, and one the tunnel is stand-by power supply V2.Main power source V1 is responsible for power supply at ordinary times, simultaneously also to stand-by power supply V2 electric power storage.When main power source V1 can't power, powered by stand-by power supply V2.The design has adopted the MAX6820 of Maxim and MOS device to realize dual power supply switching circuit.
Be whole power module as shown in Figure 1, main power source and stand-by power supply connect respectively power pin VCC1 and the VCC2 of MAX6820.
Thresholding is controlled pin SETV and is connected main power source.
Main power source power supply under normal circumstances, the GATE pin is low level.
MOS device D end and S end disconnect, and this moment, stand-by power supply was in the electric power storage state.When main power voltage is outside the thresholding of setting, GATE pin output high level driven MOS device D end and the conducting of S end of MAX6820, stand-by power supply is in the discharge condition power supply.
A kind of double supply automatic switch-over circuit of the present utility model has following beneficial effect:
Adopt double supply automatic switch-over circuit can guarantee that the power supply that is using on certain road can automatically switch on other normal power source when breaking down, guarantee the continuous power supply of system.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims (1)

1. double supply automatic switch-over circuit, comprise main power source and stand-by power supply, it is characterized in that: described double supply automatic switch-over circuit also comprises switching device and the switch element that is connected with described main power source and stand-by power supply, wherein, described switching device is integrated circuit unit, described integrated circuit unit has the first power pins, the first thresholding is controlled pin, the second source pin, the second thresholding is controlled pin, the thresholding pin, described main power source connects described the first power pins and the first thresholding is controlled pin, described stand-by power supply connects described second source pin and the second thresholding is controlled pin, described switch element is complementary metal oxide semiconductors (CMOS), described thresholding pin connects the grid of described complementary metal oxide semiconductors (CMOS), described second source pin connects the source electrode of described complementary metal oxide semiconductors (CMOS), and described stand-by power supply connects the drain electrode of described complementary metal oxide semiconductors (CMOS).
CN 201220450227 2012-09-03 2012-09-03 Double-power-supply automatic switching circuit Expired - Fee Related CN202978408U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220450227 CN202978408U (en) 2012-09-03 2012-09-03 Double-power-supply automatic switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220450227 CN202978408U (en) 2012-09-03 2012-09-03 Double-power-supply automatic switching circuit

Publications (1)

Publication Number Publication Date
CN202978408U true CN202978408U (en) 2013-06-05

Family

ID=48519433

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220450227 Expired - Fee Related CN202978408U (en) 2012-09-03 2012-09-03 Double-power-supply automatic switching circuit

Country Status (1)

Country Link
CN (1) CN202978408U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106940668A (en) * 2017-03-24 2017-07-11 上海与德科技有限公司 A kind of chip, standby pin switching circuit and its changing method
WO2020256858A1 (en) * 2019-06-20 2020-12-24 Murata Manufacturing Co., Ltd. Power transitioning circuit for dc-dc converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106940668A (en) * 2017-03-24 2017-07-11 上海与德科技有限公司 A kind of chip, standby pin switching circuit and its changing method
WO2020256858A1 (en) * 2019-06-20 2020-12-24 Murata Manufacturing Co., Ltd. Power transitioning circuit for dc-dc converter

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C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: LINBO TECHNOLOGY GROUP CO., LTD.

Free format text: FORMER NAME: LINGBU SCIENCE AND TECHNOLOGY CO LTD, SHENZHEN

CP01 Change in the name or title of a patent holder

Address after: 518000 No. two, No. 401, Jian Xing building, Cha Guang Industrial Zone, Shahe West Road, Nanshan District, Shenzhen, Guangdong

Patentee after: LINBO TECHNOLOGY GROUP CO., LTD.

Address before: 518000 No. two, No. 401, Jian Xing building, Cha Guang Industrial Zone, Shahe West Road, Nanshan District, Shenzhen, Guangdong

Patentee before: Lingbu Science and Technology Co., Ltd., Shenzhen

CP02 Change in the address of a patent holder

Address after: 201614 Shanghai city Songjiang District small town of Kunshan Port Road No. 188 Building 5 building -1

Patentee after: LINBO TECHNOLOGY GROUP CO., LTD.

Address before: 518000 No. two, No. 401, Jian Xing building, Cha Guang Industrial Zone, Shahe West Road, Nanshan District, Shenzhen, Guangdong

Patentee before: LINBO TECHNOLOGY GROUP CO., LTD.

CP02 Change in the address of a patent holder
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130605

Termination date: 20160903

CF01 Termination of patent right due to non-payment of annual fee