CN202634057U - Power supply circuit applied to real-time clock - Google Patents
Power supply circuit applied to real-time clock Download PDFInfo
- Publication number
- CN202634057U CN202634057U CN2012201800320U CN201220180032U CN202634057U CN 202634057 U CN202634057 U CN 202634057U CN 2012201800320 U CN2012201800320 U CN 2012201800320U CN 201220180032 U CN201220180032 U CN 201220180032U CN 202634057 U CN202634057 U CN 202634057U
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- Prior art keywords
- power supply
- real
- time clock
- circuit
- main power
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model discloses a power supply circuit applied to a real-time clock. The power supply circuit comprises a main power supply stabilization circuit and a real-time clock uninterrupted power supply standby power supply which is connected with the main power supply stabilization circuit. The main power supply stabilization circuit comprises a voltage stabilization resistor which is connected with a main power supply and a current limiting resistor which is connected with the voltage stabilization resistor. The real-time clock uninterrupted power supply standby power supply comprises an interruption switching chip which is connected with the current limiting resistor and an energy storage capacitor which is connected with the interruption switching chip. The negative terminal of the energy storage capacitor is connected with the ground, and the positive terminal is connected with a real-time clock circuit. According to the utility model, the simple energy storage capacitor and interruption switching chip are used, thus the structure is simple; on the premise that the real-time clock of a product has real-time property when uninterrupted power supply is ensured or power supply is turned off for a short time, the cost of the product can be effectively reduced; and the competitiveness of the product is enhanced.
Description
Technical field
The utility model relates to a kind of power circuit, the power circuit of a kind of real-time clock under product uninterrupted power supply or of short duration power failure condition of more specifically saying so.
Background technology
At present, known real-time clock stand-by power supply all need connect reserve battery usually, guarantees that real-time clock also can operate as normal under the situation of outage, or to ignore in order reducing cost and not connect, and loses the real-time of real-time clock.Reserve battery can automatically switch in the product primary power source de-energizes and supply power to real-time clock.But a lot of products all are uninterrupted power supply or of short duration power failure several hours, and what connect reserve battery can avoid clock-reset, but has increased product cost, ignore do not connect reserve battery can real-time clock be resetted again, can not embody the real-time of clock.
For this reason, the inventor creatively develops a kind of power circuit that stand-by power supply can be provided for real-time clock, and it has characteristics cheaply.
The utility model content
The purpose of the utility model is to overcome the defective of prior art, and a kind of power circuit that stand-by power supply can be provided for real-time clock is provided, and it has characteristics cheaply.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of power circuit that is used for real-time clock; Comprise main power source power supply stabilizing circuit and the real-time clock uninterrupted power supply stand-by power supply that is connected with main power source power supply stabilizing circuit; Described main power source power supply stabilizing circuit comprises the voltage regulation resistance that is connected with main power source, and the current-limiting resistance that is connected with voltage regulation resistance; Described real-time clock uninterrupted power supply stand-by power supply comprises the outage switching chip that is connected with current-limiting resistance, with the storage capacitor that is connected with outage switching chip; The negativing ending grounding of said storage capacitor, anode is connected with real time clock circuit.
Its further technical scheme is: described main power source power supply stabilizing circuit also comprises the voltage stabilizing chip parallelly connected with current-limiting resistance, the other end ground connection of said voltage stabilizing chip.
Its further technical scheme is: described real-time clock uninterrupted power supply stand-by power supply also comprises the anti-interference capacitor parallelly connected with storage capacitor.
Its further technical scheme is: it is unilateral diode that chip is switched in described outage.
Its further technical scheme is: described main power source is 3.3V, and described real time clock circuit voltage is 1.8V.
The utility model beneficial effect compared with prior art is: the utility model only adopts simple storage capacitor and outage to switch chip, and is simple in structure; The product real-time clock has under the prerequisite of real-time and can reduce product cost effectively when guaranteeing uninterrupted power supply or of short duration power failure, improves competitiveness of product.
Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.
Description of drawings
Fig. 1 is used for the circuit theory diagrams of the power circuit specific embodiment of real-time clock for the utility model.
Description of reference numerals
1 voltage regulation resistance R1,2 current-limiting resistance R2
5 storage capacitor C1,6 anti-interference capacitor C2
Embodiment
In order more to make much of the technology contents of the utility model, below in conjunction with specific embodiment the technical scheme of the utility model is further introduced and explanation, but be not limited to this.
As shown in Figure 1; A kind of power circuit that is used for real-time clock of the utility model; Comprise main power source power supply stabilizing circuit and the real-time clock uninterrupted power supply stand-by power supply that is connected with main power source power supply stabilizing circuit; Main power source power supply stabilizing circuit comprises the voltage regulation resistance R1 that is connected with main power source SYS, and the current-limiting resistance R2 that is connected with voltage regulation resistance R1; Real-time clock uninterrupted power supply stand-by power supply comprises the outage switching chip D2 that is connected with current-limiting resistance R2, with the storage capacitor C1 that is connected with outage switching chip D2; The negativing ending grounding of storage capacitor C1, anode is connected with real time clock circuit RTC.Main power source power supply stabilizing circuit also comprises the voltage stabilizing chip D1 parallelly connected with current-limiting resistance R2, the other end ground connection of voltage stabilizing chip D1.Real-time clock uninterrupted power supply stand-by power supply also comprises the anti-interference capacitor C2 parallelly connected with storage capacitor C1.It is unilateral diode that chip D2 is switched in outage.
In the present embodiment, main power source is 3.3V, and real time clock circuit voltage is 1.8V.Voltage regulation resistance (1), current-limiting resistance (2) are formed main power source power supply stabilizing circuit with voltage stabilizing chip (4); Chip (3) is switched in outage, storage capacitor (5) is formed real-time clock uninterrupted power supply stand-by power supply with anti-interference capacitor (6); Usually voltage stabilizing chip (1) uses voltage stabilizing didoe; Outage is switched chip (3) and is used the little diode of reverse leakage current; Excessive for preventing power consumption, need the parameter of appropriate design voltage regulation resistance (1) and current-limiting resistance (2), make its output current only big two to three times than real-time clock system running current; The value of storage capacitor (5) is wanted enough big and leakage current less (being the electric capacity of low pressure high power capacity), during with assurance real-time clock system cut-off several hours even several days can both operate as normal.
When the input power supply was main power source, real-time clock system main power source power supply circuits came into force automatically, and the real-time clock system works is given in power supply; When the input power cut-off, real-time clock system automatic switch-over circuit is worked automatically, and real-time clock system reserve power supply is supplied power to the real-time clock system works.
The utility model can effectively reduce product cost under the real-time clock system normal running conditions that guarantees non-stop run or of short duration power failure product, but and the real-time clock system of product all operate as normal and clock are real-time; Can be applicable to be user-friendly to various instrument and equipments more on the instrument that has real-time clock of non-stop run or of short duration power failure.
In sum, the utility model only adopts simple storage capacitor and outage to switch chip, and is simple in structure; The product real-time clock has under the prerequisite of real-time and can reduce product cost effectively when guaranteeing uninterrupted power supply or of short duration power failure, improves competitiveness of product.
The above-mentioned technology contents that only further specifies the utility model with embodiment; So that the reader is more readily understood; But do not represent the execution mode of the utility model to only limit to this, any technology of doing according to the utility model is extended or recreation, all receives the protection of the utility model.The protection range of the utility model is as the criterion with claims.
Claims (5)
1. power circuit that is used for real-time clock; It is characterized in that comprising main power source power supply stabilizing circuit and the real-time clock uninterrupted power supply stand-by power supply that is connected with main power source power supply stabilizing circuit; Described main power source power supply stabilizing circuit comprises the voltage regulation resistance that is connected with main power source, and the current-limiting resistance that is connected with voltage regulation resistance; Described real-time clock uninterrupted power supply stand-by power supply comprises the outage switching chip that is connected with current-limiting resistance, with the storage capacitor that is connected with outage switching chip; The negativing ending grounding of said storage capacitor, anode is connected with real time clock circuit.
2. the power circuit that is used for real-time clock according to claim 1 is characterized in that described main power source power supply stabilizing circuit also comprises the voltage stabilizing chip parallelly connected with current-limiting resistance, the other end ground connection of said voltage stabilizing chip.
3. the power circuit that is used for real-time clock according to claim 1 is characterized in that described real-time clock uninterrupted power supply stand-by power supply also comprises the anti-interference capacitor parallelly connected with storage capacitor.
4. the power circuit that is used for real-time clock according to claim 1 is characterized in that it is unilateral diode that chip is switched in described outage.
5. the power circuit that is used for real-time clock according to claim 1 is characterized in that described main power source is 3.3V, and described real time clock circuit voltage is 1.8V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201800320U CN202634057U (en) | 2012-04-25 | 2012-04-25 | Power supply circuit applied to real-time clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201800320U CN202634057U (en) | 2012-04-25 | 2012-04-25 | Power supply circuit applied to real-time clock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202634057U true CN202634057U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201800320U Expired - Fee Related CN202634057U (en) | 2012-04-25 | 2012-04-25 | Power supply circuit applied to real-time clock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202634057U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404135A (en) * | 2015-12-08 | 2016-03-16 | 青岛歌尔声学科技有限公司 | Real-time clock power supply circuit and method |
| CN105720678A (en) * | 2016-03-24 | 2016-06-29 | 航天科技控股集团股份有限公司 | Low cost and low power consumption capacitive RTC freewheeling circuit |
| CN106655465A (en) * | 2016-11-07 | 2017-05-10 | 珠海格力电器股份有限公司 | System clock power supply device and method and electric appliance |
-
2012
- 2012-04-25 CN CN2012201800320U patent/CN202634057U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404135A (en) * | 2015-12-08 | 2016-03-16 | 青岛歌尔声学科技有限公司 | Real-time clock power supply circuit and method |
| CN105720678A (en) * | 2016-03-24 | 2016-06-29 | 航天科技控股集团股份有限公司 | Low cost and low power consumption capacitive RTC freewheeling circuit |
| CN106655465A (en) * | 2016-11-07 | 2017-05-10 | 珠海格力电器股份有限公司 | System clock power supply device and method and electric appliance |
| CN106655465B (en) * | 2016-11-07 | 2023-09-29 | 珠海格力电器股份有限公司 | System clock power supply device, method and electric appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20150425 |
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| EXPY | Termination of patent right or utility model |