CN204597625U - A kind of dual power supply circuit - Google Patents
A kind of dual power supply circuit Download PDFInfo
- Publication number
- CN204597625U CN204597625U CN201520337701.4U CN201520337701U CN204597625U CN 204597625 U CN204597625 U CN 204597625U CN 201520337701 U CN201520337701 U CN 201520337701U CN 204597625 U CN204597625 U CN 204597625U
- Authority
- CN
- China
- Prior art keywords
- diode
- power supply
- connects
- resistance
- pin
- 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
Links
- 230000009977 dual effect Effects 0.000 title claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
Landscapes
- Rectifiers (AREA)
Abstract
The utility model discloses a kind of dual power supply circuit, comprise resistance R1, resistance R2, diode D1, three terminal regulator U1, chip U2, rectification voltage reduction module, storage battery E and metal-oxide-semiconductor VS, resistance R1 one end is contact resistance R2 and power supply VCC respectively, the resistance R1 other end is the contact resistance R2 other end, diode D1 positive pole and diode D4 positive pole respectively, and diode D1 negative pole connects diode D4 negative pole, ground capacity C1 and three terminal regulator U1 pin 2 respectively.The utility model dual power supply circuit can use electric capacity C1 and storage battery E jointly to complete stand-by power supply and power, and can automatically switch between electric capacity C1 and storage battery E, greatly extend the power-on time of stand-by power supply, circuit structure is simple, cost is low, is applicable to very much promoting the use of.
Description
Technical field
The utility model relates to a kind of power circuit, specifically a kind of dual power supply circuit.
Background technology
Along with the intellectuality of entire society advances, a lot of electrical equipment more and more requires can also continue to use part of functions after power failure, under normal circumstances, choice for use lithium battery or super capacitor are as the temporary source after power down, but common lithium battery can not charge, and finite capacity, and super capacitor capacity is little, be difficult to maintain long-time power supply, so in actual design application, how to extend Power supply after power down, ensure that electrical equipment reliably working is extremely important.
Utility model content
The purpose of this utility model is the dual power supply circuit providing a kind of stand-by power supply to power for a long time, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of dual power supply circuit, comprise resistance R1, resistance R2, diode D1, three terminal regulator U1, chip U2, rectification voltage reduction module, storage battery E and metal-oxide-semiconductor VS, described resistance R1 one end is contact resistance R2 and power supply VCC respectively, the resistance R1 other end is the contact resistance R2 other end respectively, diode D1 positive pole and diode D4 positive pole, diode D1 negative pole connects diode D4 negative pole respectively, ground capacity C1 and three terminal regulator U1 pin 2, three terminal regulator U1 pin 1 connects electric capacity C3 and ground connection, three terminal regulator U1 pin 3 connects the electric capacity C3 other end respectively, electric capacity C4, diode D2 positive pole and chip U2 pin 2, diode D2 negative pole connects rectification voltage reduction module respectively, output end vo and ground capacity C2, the rectification voltage reduction module other end connects 220V alternating current, described diode D3 positive pole connects the D pole of the electric capacity C4 other end and metal-oxide-semiconductor VS respectively, the S pole of metal-oxide-semiconductor VS connects ground connection storage battery E, the G pole of metal-oxide-semiconductor VS connects diode D5 negative pole and diode D6 negative pole respectively, diode D5 positive pole connects power supply VCC by resistance R3, described diode D6 positive pole connects chip U2 pin 1 by resistance R4, chip U2 pin 3 connects chip U2 pin 4 and chip U2 pin 5 also ground connection respectively.
As further program of the utility model: described power supply VCC is the 3.3V direct voltage source that 220V alternating current obtains after conversion.
As further program of the utility model: described metal-oxide-semiconductor VS is NMOS tube.
As further program of the utility model: described three terminal regulator U1 is AT2138.
As the utility model further scheme: described chip U2 is 80829CLMC.
Compared with prior art, the beneficial effects of the utility model are: the utility model dual power supply circuit can use electric capacity C1 and storage battery E jointly to complete stand-by power supply and power, and can automatically switch between electric capacity C1 and storage battery E, greatly extend the power-on time of stand-by power supply, circuit structure is simple, cost is low, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of dual power supply circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of dual power supply circuit, comprise resistance R1, resistance R2, diode D1, three terminal regulator U1, chip U2, rectification voltage reduction module, storage battery E and metal-oxide-semiconductor VS, resistance R1 one end is contact resistance R2 and power supply VCC respectively, the resistance R1 other end is the contact resistance R2 other end respectively, diode D1 positive pole and diode D4 positive pole, diode D1 negative pole connects diode D4 negative pole respectively, ground capacity C1 and three terminal regulator U1 pin 2, three terminal regulator U1 pin 1 connects electric capacity C3 and ground connection, three terminal regulator U1 pin 3 connects the electric capacity C3 other end respectively, electric capacity C4, diode D2 positive pole and chip U2 pin 2, diode D2 negative pole connects rectification voltage reduction module respectively, output end vo and ground capacity C2, the rectification voltage reduction module other end connects 220V alternating current, diode D3 positive pole connects the D pole of the electric capacity C4 other end and metal-oxide-semiconductor VS respectively, the S pole of metal-oxide-semiconductor VS connects ground connection storage battery E, the G pole of metal-oxide-semiconductor VS connects diode D5 negative pole and diode D6 negative pole respectively, diode D5 positive pole connects power supply VCC by resistance R3, diode D6 positive pole connects chip U2 pin 1 by resistance R4, chip U2 pin 3 connects chip U2 pin 4 and chip U2 pin 5 also ground connection respectively.
Power supply VCC is the 3.3V direct voltage source that 220V alternating current obtains after conversion.
Metal-oxide-semiconductor VS is NMOS tube.
Three terminal regulator U1 is AT2138.
Chip U2 is 80829CLMC.
Operation principle of the present utility model is: refer to Fig. 1, after disconnecting to the alternating current 220V of step-down rectifier module for power supply, output end vo voltage drops to 0V by 3.3V, and electric capacity C1 starts to power to three terminal regulator U1, export 3.3V voltage, powered to output end vo by diode D2, when electric capacity C1 electricity is sufficient, three terminal regulator U1 can be maintained and export 3.3V voltage, as the input voltage of voltage checking chip U2, voltage checking chip U2 can be made to export high level, control metal-oxide-semiconductor VS through diode D5 and be in off state, thus keep storage battery E to disconnect, now only electric capacity C1 powers, along with the prolongation of electric capacity C1 discharge time, electricity gradually reduces, three terminal regulator U1 output voltage declines from 3.3V, when electric capacity C1 electricity is not enough, when three terminal regulator U1 output voltage is lower than 2.9V, voltage checking chip U2 is by output low level, control metal-oxide-semiconductor VS through diode D5 and be in Operating In Persistent Current Mode state, storage battery E connects, power to output end vo, after alternating current recovers, input is normal, electric capacity C1 starts charging, metal-oxide-semiconductor VS is made to be in off state, storage battery E disconnects, output end vo is by the 220V AC-powered through over commutation voltage reduction module.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (5)
1. a dual power supply circuit, comprise resistance R1, resistance R2, diode D1, three terminal regulator U1, chip U2, rectification voltage reduction module, storage battery E and metal-oxide-semiconductor VS, it is characterized in that, described resistance R1 one end is contact resistance R2 and power supply VCC respectively, the resistance R1 other end is the contact resistance R2 other end respectively, diode D1 positive pole and diode D4 positive pole, diode D1 negative pole connects diode D4 negative pole respectively, ground capacity C1 and three terminal regulator U1 pin 2, three terminal regulator U1 pin 1 connects electric capacity C3 and ground connection, three terminal regulator U1 pin 3 connects the electric capacity C3 other end respectively, electric capacity C4, diode D2 positive pole and chip U2 pin 2, diode D2 negative pole connects rectification voltage reduction module respectively, output end vo and ground capacity C2, the rectification voltage reduction module other end connects 220V alternating current, described diode D3 positive pole connects the D pole of the electric capacity C4 other end and metal-oxide-semiconductor VS respectively, the S pole of metal-oxide-semiconductor VS connects ground connection storage battery E, the G pole of metal-oxide-semiconductor VS connects diode D5 negative pole and diode D6 negative pole respectively, diode D5 positive pole connects power supply VCC by resistance R3, described diode D6 positive pole connects chip U2 pin 1 by resistance R4, chip U2 pin 3 connects chip U2 pin 4 and chip U2 pin 5 also ground connection respectively.
2. dual power supply circuit according to claim 1, is characterized in that, described power supply VCC is the 3.3V direct voltage source that 220V alternating current obtains after conversion.
3. dual power supply circuit according to claim 1, is characterized in that, described metal-oxide-semiconductor VS is NMOS tube.
4. dual power supply circuit according to claim 1, is characterized in that, described three terminal regulator U1 is AT2138.
5. dual power supply circuit according to claim 1, is characterized in that, described chip U2 is 80829CLMC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337701.4U CN204597625U (en) | 2015-05-22 | 2015-05-22 | A kind of dual power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337701.4U CN204597625U (en) | 2015-05-22 | 2015-05-22 | A kind of dual power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204597625U true CN204597625U (en) | 2015-08-26 |
Family
ID=53933736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520337701.4U Expired - Fee Related CN204597625U (en) | 2015-05-22 | 2015-05-22 | A kind of dual power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204597625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864892A (en) * | 2020-08-07 | 2020-10-30 | 广东博力威科技股份有限公司 | RTC clock dual-power supply circuit |
-
2015
- 2015-05-22 CN CN201520337701.4U patent/CN204597625U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864892A (en) * | 2020-08-07 | 2020-10-30 | 广东博力威科技股份有限公司 | RTC clock dual-power supply circuit |
| CN111864892B (en) * | 2020-08-07 | 2024-06-04 | 广东博力威科技股份有限公司 | RTC clock dual-power supply circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204068347U (en) | A kind of solar control circuit | |
| CN204316176U (en) | A kind of management system of dual power supply | |
| CN204465104U (en) | A kind of portable set charging power source circuit | |
| CN204349496U (en) | Portable multi-voltage output mobile power supply | |
| CN203522318U (en) | Three-power-supply switching circuit and consumer electronic equipment | |
| CN105262183A (en) | Power-saving type USB charging structure | |
| CN204597625U (en) | A kind of dual power supply circuit | |
| CN205051402U (en) | Lithium batteries control circuit | |
| CN204967352U (en) | Mobile power source | |
| CN203205942U (en) | Charging control structure for standby battery of inductive energy-taking power supply | |
| CN107465247B (en) | Faraday capacitor delay power-off circuit suitable for intelligent cabinet control system | |
| CN103094937B (en) | Intelligent charging circuit and lamp | |
| CN204481563U (en) | A kind of quick converter circuitry of power of powering for microcomputer | |
| CN204167928U (en) | A kind of quick charged portable power source | |
| CN204696792U (en) | A kind of alternating current-direct current automatic switch-over circuit | |
| CN209709738U (en) | A kind of power supply system based on more solar panels and more rechargeable batteries | |
| CN202997691U (en) | An automatic switching circuit capable of switching power between a power supply and a battery in an electronic switch | |
| CN203800689U (en) | Rechargeable air conditioner | |
| CN204103480U (en) | A kind of charger reversal connection and short-circuit protection circuit | |
| CN202906569U (en) | Internal and external power-supply switching circuit for electric energy meter | |
| CN205753603U (en) | A kind of photovoltaic voltage stabilizing charging circuit | |
| CN205945120U (en) | Automatic charger of solar energy | |
| CN205921434U (en) | Dual supply direct current stabilizer | |
| CN110148999A (en) | A kind of adaptive switching switch of USB and battery dual power supply system | |
| CN204559124U (en) | A kind of based on the cell anti-reverse device of lithium battery photovoltaic against Ore-controlling Role |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151224 Address after: 510800 Guangdong city in Guangzhou Province, Xinhua Street, Tian Village economic cooperatives southeast Huadu District days Road No. 62 building room 708 Patentee after: Guangzhou Yingfan Electrical Technology Co., Ltd. Address before: 315700, seven Li village, Xinqiao Town, Xiangshan County, Zhejiang, Ningbo Patentee before: Yao Zhiyong |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160522 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |