CN109873484A - A kind of power supply circuit of clock that power down is adaptive switched and its control method - Google Patents
A kind of power supply circuit of clock that power down is adaptive switched and its control method Download PDFInfo
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- CN109873484A CN109873484A CN201711272482.6A CN201711272482A CN109873484A CN 109873484 A CN109873484 A CN 109873484A CN 201711272482 A CN201711272482 A CN 201711272482A CN 109873484 A CN109873484 A CN 109873484A
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Abstract
The present invention relates to a kind of power supply circuit of clock that power down is adaptive switched and its control methods.The adaptive switched power supply circuit of clock of power down includes battery, auto switching control circuit, energy storage filter circuit and clock circuit, the anode of battery is connected with the input terminal of auto switching control circuit, the output end of auto switching control circuit is connected with the operating voltage input pin VDD of clock circuit, and input power, energy storage filter circuit are also connected with the operating voltage input pin VDD of clock circuit respectively.The present invention according to input power whether power down by auto switching control circuit control battery power supply line power on/off, avoid battery do not need power supply when still consumption electric energy, thus extend battery use the time.Pass through setting energy storage filter circuit simultaneously, it is ensured that clock circuit be converted to by input power it is battery powered during for clock circuit provide electric energy, guarantee the reliability that clock circuit power supply switches.
Description
Technical field
The present invention relates to a kind of power supply circuit of clock more particularly to a kind of power supply circuit of clock that power down is adaptive switched and its controls
Method processed.
Background technique
Existing power supply circuit of clock, is divided into battery power supply from power supply source and super capacitor is powered two kinds.It is designing
When the electrical equipment or instrument of long service life, if charging pile, ammeter design average life span were at 10 years or so, super capacitor is supplied
The clock circuit of electricity due to super capacitor capacity, price and high and low temperature environment etc. influence, using being subject to certain restrictions.Battery
Due to energy density height, moderate, adaptive capacity to environment is good, is used widely in long-life equipment.
Existing power supply circuit of clock is generally made of battery, two diodes and capacitor, and the anode of battery is through No.1 two
Pole pipe is connected with the operating voltage foot of clock chip, input power through No. two diodes also with the operating voltage foot phase of clock chip
Even, while the operating voltage foot meridian capacitor of clock chip is grounded.After input power power-off, clock chip also needs to work on
To maintain clock count, the power supply of clock chip is guaranteed by battery at this time.The shortcomings that above-mentioned power supply circuit of clock is to input
When power supply has electricity, battery power still can be consumed, service time of battery is substantially reduced.
Summary of the invention
In order to solve the above-mentioned technical problem the present invention, provides a kind of power supply circuit of clock that power down is adaptive switched and its controlling party
Method, can according to input power whether power down automatically control battery power supply line power on/off, avoid battery from not needing to supply
Still in consumption electric energy when electric, to extend the use time of battery.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals: one kind of the invention is automatic
The power-down retaining circuit of switching, including battery, auto switching control circuit, energy storage filter circuit and clock circuit, battery is just
Pole is connected with the input terminal of auto switching control circuit, the output end of auto switching control circuit and the operating voltage of clock circuit
Input pin VDD is connected, and input power, energy storage filter circuit are also connected with the operating voltage input pin VDD of clock circuit respectively.When
When input power has electricity, input power is conveyed to the operating voltage input pin VDD of clock circuit, powers to clock circuit, simultaneously
Input power inputs to energy storage filter circuit, and energy storage filter circuit reserve power, auto switching control circuit, which is in, at this time disconnects
State, battery do not supply electricity to clock circuit；When input power power down, auto switching control circuit in an ON state, battery
The electric energy of output is conveyed to the operating voltage input pin VDD of clock circuit through auto switching control circuit, powers to clock circuit,
Simultaneously energy storage filter circuit clock circuit be converted to by input power it is battery powered during for clock circuit provide electric energy,
Guarantee the reliability of clock circuit power supply switching.The technical program can according to input power whether power down automatically control electricity
The power on/off of pond power supply line avoids battery when not needing power supply still in consumption electric energy, to extend the use time of battery.
Pass through setting energy storage filter circuit simultaneously, it is ensured that being converted to battery powered in clock circuit by input power is in the process clock
Circuit provides electric energy, guarantees the reliability of clock circuit power supply switching.
Preferably, the auto switching control circuit includes field-effect tube Q1, resistance R1 and diode D1, field-effect
The source electrode of pipe Q1 is connected with the anode of the battery, and the grid of field-effect tube Q1 had not only been connected with the input power but also through electricity
R1 ground connection is hindered, the drain electrode of field-effect tube Q1 is connected with the anode of diode D1, the cathode of diode D1 and the clock circuit
Operating voltage input pin VDD be connected.When input power has electricity, field-effect tube Q1 is in off state, and battery does not supply electricity to
Clock circuit；When input power power down, field-effect tube Q1 is in the conductive state, the electric energy of battery output through field-effect tube Q1 and
Diode D1 is conveyed to the operating voltage input pin VDD of clock circuit, powers to clock circuit.The setting of diode is played anti-
It is acted on to voltage protection, guarantees the power good, reliable of output.
Preferably, a kind of adaptive switched power supply circuit of clock of power down includes by resistance R3 and light emitting diode D3
The drain electrode of the condition indication circuit of composition, field-effect tube Q1 is connected through resistance R3 with the anode of light emitting diode D3, light-emitting diodes
The cathode of pipe D4 is grounded.When field-effect tube Q1 conducting, light emitting diode D3 is lit, and reminds related personnel, at this time input electricity
Source power down, is just battery powered.
Preferably, the energy storage filter circuit includes capacitor C1, one end of capacitor C1 and the clock circuit
Operating voltage input pin VDD is connected, the other end ground connection of capacitor C1.When input power has electricity, charge to capacitor C1；Input power
When power down, battery is powered to clock circuit, while capacitor C1 discharges.It is converted in clock circuit by input power battery powered
Capacitor C1 is discharge condition in the process, provides electric energy for clock circuit, guarantees the reliability of clock circuit power supply switching.
Preferably, the input power is connected with the anode of diode D2, the cathode of diode D2 and it is described when
The operating voltage input pin VDD of clock circuit is connected.The setting of diode, plays the role of reverse-voltage protection, guarantees the electricity of output
Source is stable, reliable.
A kind of power down of the invention adaptive switched power supply circuit of clock and its control method are as follows: when input power has electricity,
Input power is conveyed to the operating voltage input pin VDD of the clock circuit, powers to clock circuit, while input power is defeated
Enter to the energy storage filter circuit, energy storage filter circuit reserve power, the auto switching control circuit is in disconnected at this time
Open state, the battery do not supply electricity to the clock circuit；When input power power down, the auto switching controls electricity
In an ON state, the electric energy of battery output is conveyed to the operating voltage input pin of clock circuit through auto switching control circuit on road
VDD, gives clock circuit power supply, at the same the energy storage filter circuit be converted in clock circuit by input power it is battery powered
Electric energy is provided for clock circuit in the process, guarantees the reliability of clock circuit power supply switching.The technical program can be according to defeated
Enter power supply whether power down automatically control battery power supply line power on/off, avoid battery do not need power supply when still consumption electricity
Can, to extend the use time of battery.Pass through setting energy storage filter circuit simultaneously, it is ensured that turned by input power in clock circuit
Be changed to it is battery powered during for clock circuit provide electric energy, guarantee the reliability that clock circuit power supply switches.
Preferably, the auto switching control circuit includes field-effect tube Q1, resistance R1 and diode D1, field-effect
The source electrode of pipe Q1 is connected with the anode of the battery, and the grid of field-effect tube Q1 had not only been connected with the input power but also through electricity
R1 ground connection is hindered, the drain electrode of field-effect tube Q1 is connected with the anode of diode D1, the cathode of diode D1 and the clock circuit
Operating voltage input pin VDD be connected；Energy storage filter circuit includes capacitor C1, one end of capacitor C1 and the clock circuit
Operating voltage input pin VDD is connected, the other end ground connection of capacitor C1；The control method are as follows: defeated when input power has electricity
Enter the operating voltage input pin VDD that power supply is conveyed to the clock circuit, power to clock circuit, while input power is to electricity
Hold C1 and be filled with reserve power, field-effect tube Q1 is in off state at this time, and the battery does not supply electricity to the clock circuit；
When input power power down, field-effect tube Q1 is in the conductive state, and the electric energy of battery output is through field-effect tube Q1 and diode D1
It is conveyed to the operating voltage input pin VDD of clock circuit, is powered to clock circuit, while being converted in clock circuit by input power
Be it is battery powered during capacitor C1 be discharge condition, provide electric energy for clock circuit, guarantee clock circuit power supply is cut
The reliability changed.
The beneficial effects of the present invention are: its can according to input power whether power down automatically controls the logical of battery power supply line
Power-off avoids battery when not needing power supply still in consumption electric energy, to extend the use time of battery.Pass through setting storage simultaneously
Can filter circuit, it is ensured that clock circuit be converted to by input power it is battery powered during for clock circuit provide electric energy,
Guarantee the reliability of clock circuit power supply switching.
Detailed description of the invention
Fig. 1 is a kind of circuit theory connection block diagram of the invention.
Fig. 2 is a kind of circuit diagram of the invention.
1. auto switching control circuit in figure, 2. energy storage filter circuits, 3. condition indication circuits, 4. batteries, 5. clocks electricity
Road, 6. input powers.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment: a kind of adaptive switched power supply circuit of clock of power down of the present embodiment, as shown in Figure 1, include battery 4, from
Dynamic on-off control circuit 1, energy storage filter circuit 2, condition indication circuit 3 and clock circuit 5, the anode and auto switching of battery 4
The input terminal of control circuit 1 is connected, the output end of auto switching control circuit and the operating voltage input pin VDD of clock circuit 5
It is connected, input power 6, energy storage filter circuit 2 are also connected with the operating voltage input pin VDD of clock circuit respectively.Auto switching
Control circuit 1 is also connected with condition indication circuit 3.
As shown in Fig. 2, auto switching control circuit includes field-effect tube Q1, resistance R1 and diode D1；State instruction electricity
Road includes resistance R3 and light emitting diode D3；Energy storage filter circuit includes capacitor C1.The voltage of input power is VCC, clock electricity
Road is clock chip U1.The source electrode of field-effect tube Q1 is connected with the anode of battery BT1, and the grid of field-effect tube Q1 was both electric with input
Source voltage VCC is connected to be grounded through resistance R1 again, and the drain electrode of field-effect tube Q1 is connected with the anode of diode D1, and diode D1's is negative
Pole is connected with the operating voltage input pin VDD of clock chip U1.The drain electrode of field-effect tube Q1 is through resistance R3 and light emitting diode D3
Anode be connected, the cathode of light emitting diode D4 ground connection.One end of capacitor C1 and the operating voltage input pin VDD of clock chip U1
It is connected, the other end ground connection of capacitor C1.Input supply voltage VCC is connected with the anode of diode D2, the cathode of diode D2 and
The operating voltage input pin VDD of clock chip U1 is connected.
The control method of the adaptive switched power supply circuit of clock of above-mentioned power down are as follows: when input power has electricity, input power is defeated
The operating voltage input pin VDD for giving clock chip powers to clock circuit, while input power is filled with deposit electricity to capacitor C1
Can, field-effect tube Q1 is in off state at this time, and battery does not supply electricity to clock circuit；When input power power down, field-effect tube
Q1 is in the conductive state, and the operating voltage that the electric energy of battery output is conveyed to clock chip through field-effect tube Q1 and diode D1 is defeated
Entering foot VDD, powers to clock circuit, light emitting diode D3 is lit at this time, prompting related personnel, input power power down at this time,
It is just battery powered, while being converted to battery powered capacitor C1 in the process by input power in clock circuit is discharge condition,
Electric energy is provided for clock circuit, guarantees the reliability of clock circuit power supply switching.
The present invention can according to input power whether power down automatically control battery power supply line power on/off, avoid battery from existing
Electric energy still is being consumed when not needing power supply, to extend the use time of battery.Pass through setting energy storage filter circuit simultaneously, it is ensured that
Clock circuit be converted to by input power it is battery powered during for clock circuit provide electric energy, guarantee that clock circuit is powered
The reliability of power supply switching.
Claims (7)
1. a kind of power supply circuit of clock that power down is adaptive switched, it is characterised in that including battery, auto switching control circuit, energy storage filter
The anode of wave circuit and clock circuit, battery is connected with the input terminal of auto switching control circuit, auto switching control circuit
Output end is connected with the operating voltage input pin VDD of clock circuit, and input power, energy storage filter circuit are also respectively and clock circuit
Operating voltage input pin VDD be connected.
2. a kind of adaptive switched power supply circuit of clock of power down according to claim 1, it is characterised in that described is automatic logical
Disconnected control circuit includes field-effect tube Q1, resistance R1 and diode D1, the anode of the source electrode of field-effect tube Q1 and the battery
Be connected, the grid of field-effect tube Q1 is not only connected with the input power but also is grounded through resistance R1, the drain electrode of field-effect tube Q1 with
The anode of diode D1 is connected, and the cathode of diode D1 is connected with the operating voltage input pin VDD of the clock circuit.
3. a kind of adaptive switched power supply circuit of clock of power down according to claim 2, it is characterised in that including by resistance R3
The condition indication circuit constituted with light emitting diode D3, anode of the drain electrode of field-effect tube Q1 through resistance R3 and light emitting diode D3
It is connected, the cathode ground connection of light emitting diode D4.
4. a kind of adaptive switched power supply circuit of clock of power down according to claim 1, it is characterised in that the energy storage filter
Wave circuit includes capacitor C1, and one end of capacitor C1 is connected with the operating voltage input pin VDD of the clock circuit, capacitor C1's
Other end ground connection.
5. a kind of adaptive switched power supply circuit of clock of power down according to claim 1 or 2 or 3 or 4, it is characterised in that described
Input power be connected with the anode of diode D2, the operating voltage input pin of the cathode of diode D2 and the clock circuit
VDD is connected.
6. a kind of control method for the power supply circuit of clock that power down as described in claim 1 is adaptive switched, it is characterised in that when defeated
When entering power supply has electricity, input power is conveyed to the operating voltage input pin VDD of the clock circuit, powers to clock circuit,
Input power inputs to the energy storage filter circuit simultaneously, energy storage filter circuit reserve power, at this time the auto switching
Control circuit is in an off state, and the battery does not supply electricity to the clock circuit；It is described when input power power down
In an ON state, the electric energy of battery output is conveyed to clock circuit through auto switching control circuit to auto switching control circuit
Operating voltage input pin VDD powers to clock circuit, while the energy storage filter circuit is turned in clock circuit by input power
Be changed to it is battery powered during for clock circuit provide electric energy, guarantee the reliability that clock circuit power supply switches.
7. the control method of the adaptive switched power supply circuit of clock of power down according to claim 6, it is characterised in that described
Auto switching control circuit includes field-effect tube Q1, resistance R1 and diode D1, the source electrode of field-effect tube Q1 and the battery
Anode be connected, the grid of field-effect tube Q1 is not only connected with the input power but also is grounded through resistance R1, field-effect tube Q1's
Drain electrode is connected with the anode of diode D1, the operating voltage input pin VDD phase of the cathode of diode D1 and the clock circuit
Even；Energy storage filter circuit includes capacitor C1, the operating voltage input pin VDD phase of one end of capacitor C1 and the clock circuit
Even, the other end ground connection of capacitor C1；The control method are as follows: when input power has electricity, input power is conveyed to described
The operating voltage input pin VDD of clock circuit powers to clock circuit, while input power is filled with reserve power to capacitor C1,
Field-effect tube Q1 is in off state at this time, and the battery does not supply electricity to the clock circuit；When input power power down,
Field-effect tube Q1 is in the conductive state, and the electric energy of battery output is conveyed to the work of clock circuit through field-effect tube Q1 and diode D1
Make voltage input foot VDD, powers to clock circuit, while during clock circuit is converted to battery powered by input power
Capacitor C1 is discharge condition, provides electric energy for clock circuit, guarantees the reliability of clock circuit power supply switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272482.6A CN109873484A (en) | 2017-12-05 | 2017-12-05 | A kind of power supply circuit of clock that power down is adaptive switched and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272482.6A CN109873484A (en) | 2017-12-05 | 2017-12-05 | A kind of power supply circuit of clock that power down is adaptive switched and its control method |
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| Publication Number | Publication Date |
|---|---|
| CN109873484A true CN109873484A (en) | 2019-06-11 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711272482.6A Pending CN109873484A (en) | 2017-12-05 | 2017-12-05 | A kind of power supply circuit of clock that power down is adaptive switched and its control method |
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| CN (1) | CN109873484A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110588688A (en) * | 2019-09-23 | 2019-12-20 | 珠海格力电器股份有限公司 | Clock control device, air conditioning system and clock control method thereof |
| CN111835195A (en) * | 2020-07-24 | 2020-10-27 | 展讯通信（上海）有限公司 | Self-adaptive power supply voltage regulating circuit |
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| US20010022472A1 (en) * | 1999-09-30 | 2001-09-20 | George Codina | Method and apparatus for providing uninterrupted power during transitions between a power source and a standby generator using capacitor supplied voltage |
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| CN204359861U (en) * | 2014-12-31 | 2015-05-27 | 潍坊五洲浩特电气有限公司 | The real-time clock power circuit of intelligent electric meter and be provided with the intelligent electric meter of this circuit |
| CN104950774A (en) * | 2015-06-29 | 2015-09-30 | 中国人民解放军63698部队 | Clock holding device having power-off protection function |
| 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 |
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2017
- 2017-12-05 CN CN201711272482.6A patent/CN109873484A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010022472A1 (en) * | 1999-09-30 | 2001-09-20 | George Codina | Method and apparatus for providing uninterrupted power during transitions between a power source and a standby generator using capacitor supplied voltage |
| CN203352860U (en) * | 2013-04-17 | 2013-12-18 | 江杨金 | Intelligent identification power supply during power grid blackout or artificial-switching power-off |
| CN204231004U (en) * | 2014-11-18 | 2015-03-25 | 杭州海兴电力科技股份有限公司 | Power control circuit |
| CN204359861U (en) * | 2014-12-31 | 2015-05-27 | 潍坊五洲浩特电气有限公司 | The real-time clock power circuit of intelligent electric meter and be provided with the intelligent electric meter of this circuit |
| CN104950774A (en) * | 2015-06-29 | 2015-09-30 | 中国人民解放军63698部队 | Clock holding device having power-off protection function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110588688A (en) * | 2019-09-23 | 2019-12-20 | 珠海格力电器股份有限公司 | Clock control device, air conditioning system and clock control method thereof |
| CN110588688B (en) * | 2019-09-23 | 2020-08-18 | 珠海格力电器股份有限公司 | Clock control device, air conditioning system and clock control method thereof |
| CN111835195A (en) * | 2020-07-24 | 2020-10-27 | 展讯通信（上海）有限公司 | Self-adaptive power supply voltage regulating circuit |
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Application publication date: 20190611 |