CN108336786A - A kind of anti-load power source oscillating circuit for farad capacitor backup power supply - Google Patents
A kind of anti-load power source oscillating circuit for farad capacitor backup power supply Download PDFInfo
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- CN108336786A CN108336786A CN201810145536.0A CN201810145536A CN108336786A CN 108336786 A CN108336786 A CN 108336786A CN 201810145536 A CN201810145536 A CN 201810145536A CN 108336786 A CN108336786 A CN 108336786A
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- current
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- power source
- limiting resistance
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- 239000003990 capacitor Substances 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000010355 oscillation Effects 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910003307 Ni-Cd Inorganic materials 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 102220012898 rs397516346 Human genes 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
Abstract
The invention discloses a kind of anti-load power source oscillating circuits for farad capacitor backup power supply.A kind of anti-load power source oscillating circuit for farad capacitor backup power supply of the invention, the circuit includes anti-oscillation control circuit, power-fail detection circuit and charge-discharge circuit；The power-fail detection circuit connects charge-discharge circuit, and the charge-discharge circuit connects anti-oscillation control circuit；The anti-oscillation control circuit is for connecting load power source.A kind of anti-load power source oscillating circuit for farad capacitor backup power supply of the invention, the oscillation repeatedly of load power source circuit, extends the service life of load power source when effectively preventing farad capacitor as backup power supply.
Description
Technical field
The present invention relates to field of power supplies, especially a kind of anti-load power source for farad capacitor backup power supply vibrates electricity
Road.
Background technology
With the raising of farad capacitor production technology, service life greatly improves, and farad capacitor charge and discharge number is more than 50
Ten thousand times, be 500 times of Li-lon batteries, is 1000 times of Ni-MH and Ni-Cd batteries, and farad capacitor can be with high current
Charging, the charge and discharge period, simple to circuit requirement, memory-less effect so that farad capacitor does backup power supply application increasingly
Extensively.
In the prior art, standby source is done with farad capacitor, Basic practice is that the direct charge and discharge of farad capacitor is allowed to supply electricity at present
Load power source is used, and when farad capacitor power down operating voltage minimum to load power source circuit, load power source is stopped, due to method
The big reason of capacitance internal resistance is drawn, farad capacitor voltage is risen to again on the minimum operating voltage of load power source circuit at this time, load
Power circuit works again, is easy to generate oscillation to load power source circuit repeatedly.
Since load power source circuit vibrates repeatedly, if load power source circuit has MCU or memory etc, circuit therewith can
Generate automatically restart with it is repeatedly erasable, influence service life.
Invention content
A kind of anti-load power source oscillating circuit for farad capacitor backup power supply of the invention, in farad capacitor backup power supply
It is middle that anti-oscillation control circuit is added, it has well solved and has generated oscillation influence late-class circuit when making backup power supply with farad capacitor
The problem of.
The technical solution adopted in the present invention is：A kind of anti-load power source for farad capacitor backup power supply vibrates electricity
Road, the circuit include anti-oscillation control circuit, power-fail detection circuit and charge-discharge circuit；The power-fail detection circuit connection is filled
Discharge circuit, the charge-discharge circuit connect anti-oscillation control circuit；The anti-oscillation control circuit is for connecting load power source.
Preferably, the anti-oscillation control circuit further includes the first diode, filter capacitor, the first triode, the two or three
Pole pipe, the first divider resistance, the second divider resistance, third divider resistance, the 4th divider resistance, the 5th divider resistance, the 6th limit
Leakage resistance, the 7th pull-up resistor, the 8th current-limiting resistance, the 9th current-limiting resistance；The third divider resistance and the first triode
Emitter connects, and the 6th current-limiting resistance connect with the base stage of the first triode, the other end of the 6th current-limiting resistance and
The collector of second triode connects, and the 9th current-limiting resistance is also connect with the collector of the second triode, the 9th limit
The other end of leakage resistance is grounded, and the 8th current-limiting resistance is connect with the base stage of the second triode, the 7th pull-up resistor and
The emitter of second triode connects, and the other end of the 7th current-limiting resistance is connect with the positive of the first diode, and described the
Respectively with the 5th divider resistance, the other end of the 5th divider resistance is grounded the cathode of one diode.
Preferably, the power-fail detection circuit include third transistor, the 11st current-limiting resistance, the 12nd divider resistance and
13rd divider resistance；The base stage of the third transistor is connect with the 11st current-limiting resistance, the current collection of the third transistor
Pole is connect with the 12nd divider resistance, the 12nd divider resistance and the series connection of the 13rd divider resistance, the 13rd divider resistance
The other end ground connection.
Preferably, the charge-discharge circuit includes the second Schottky diode, third Schottky diode, the 4th Schottky
Diode, the tenth current-limiting resistance and farad capacitor；The cathode of the third Schottky diode is connect with the tenth current-limiting resistance, institute
The other end for stating the tenth current-limiting resistance is connect with the anode of the 4th Schottky diode, the farad capacitor and the 4th Schottky two
The anode connection of pole pipe, the other end ground connection of the farad capacitor.
Preferably, the first triode, the second triode and third transistor are NPN triode.
The beneficial effects of the invention are as follows：
A kind of anti-load power source oscillating circuit for farad capacitor backup power supply of the invention, effectively prevents farad capacitor
The oscillation repeatedly of load power source circuit, extends the service life of load power source when as backup power supply.
Description of the drawings
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is farad capacitor charge-discharge system schematic diagram of the present invention；
Fig. 2 is a kind of anti-load power source oscillating circuit schematic diagram for farad capacitor backup power supply of the invention.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
Fig. 1 is farad capacitor charge-discharge system schematic diagram of the present invention, includes power-fail detection circuit, charge-discharge circuit, bears
Carry power circuit, anti-oscillation control circuit and MCU module.
In the prior art with farad capacitance method draw the direct charge and discharge of capacitance supply electricity to load power source, when farad capacitor power down to bear
When carrying the minimum operating voltage of power circuit, load power source is stopped.Since farad capacitor internal resistance is big, farad capacitor voltage at this time
It rises on the minimum operating voltage of load power source circuit, load power source circuit works again, is easy repeatedly to load
Power circuit generates oscillation.
Present invention aim to address load power sources when making backup power supply with farad capacitor to lead to the problem of oscillation.Reference chart
2, the present invention proposes a kind of anti-load power source oscillating circuit for farad capacitor backup power supply, is provided with detection of power loss electricity
Road, charge-discharge circuit, anti-oscillation control circuit.
In the present embodiment, as shown in Fig. 2, chip U1 includes that detection of power loss signal input part VDROP_MON and control are enabled
Signal output end VDD_EN, detection of power loss signal input part VDROP_MON connection power-fail detection circuits, control enable signal are defeated
Outlet VDD_EN connection load circuits.Power-fail detection circuit connects charge-discharge circuit, and charge-discharge circuit connects anti-vibrational control electricity
Road.
In the present embodiment, as shown in Fig. 2, anti-oscillation control circuit further includes the first diode D1, capacitance C1, the one or three pole
Pipe Q1, the second triode Q2, the first divider resistance R1, the second divider resistance R2, third divider resistance R3, the 4th divider resistance
R4, the 5th divider resistance R5, the 6th current-limiting resistance R6, the 7th pull-up resistor R7, the 8th current-limiting resistance R8, the 9th current-limiting resistance
R9.First diode D1 is when chip U2 is stopped, to reduce the second diode Q2 conducting pressures to backwash 4V or more in voltage
Drop.
In the present embodiment, as shown in Fig. 2, power-fail detection circuit include third transistor Q3, the 11st current-limiting resistance R11,
12nd divider resistance R12 and the 13rd divider resistance R13.
In the present embodiment, as shown in Fig. 2, charge-discharge circuit includes the second Schottky diode D2, two pole of third Schottky
Pipe D3, the 4th Schottky diode D4, the tenth current-limiting resistance R10 and farad capacitor C2.Wherein the second Schottky diode D2,
Three Schottky diode D3 and the 4th Schottky diode D4 are to utilize diode unilateral conduction characteristic, prevent farad electricity after power-off
The voltage for holding C2 flows back to the places+5V.
Wherein+5V_Core is the voltage that load power source circuit generates for supplying load power source circuit, 3V3.
The operation principle of chip U1：The comparison voltage at VCC signal end is 2.2V, when VDET signal end voltages are more than 2.2V
When, OUT signal end exports high level；When VDET signal end voltages are less than 2.2V, OUT signal end exports low level.
The operation principle of the present embodiment：
When+5V is powered on, farad capacitor C2 charges；After+5V is powered off, when+5V is less than 4V, detection of power loss signal
Input terminal VDROP_MON carries out detection of power loss, and chip U3 carries out data preservation.For entire power-fail detection circuit specific works
Process is：When not powering off also, 5V-3.3V=1.7V ＞ 0.7V, according to PNP triode operation principle, 1.7V is more than PNP tri-
The conduction voltage drop of pole pipe, third transistor Q3 conductings, R12, R13 are right, and+5V is divided,
VDROP_MON=5/ (R12+R13) * R13=3.3V, after power-off, when+5V is dropped into it is smaller than 4V when, triode work
Work ends, and third transistor Q3 is not turned on, VDROP_MON=0V, and U3MCU carries out detection of power loss and preserves data.
In the anti-oscillation control circuit of farad capacitor, when farad capacitor C2 discharges, VDET=+5V_Core* (R2+
R3)/(R1+R2+R3), VDET signal ends decline as+5V_Core declines.
When VDET drops to chip U1PJ7022 voltage comparison points, U1 signal output ends OUT exports low level, that is, controls
Enable signal output end VDD_EN is low level, load power source U2 output shutdowns；Due to load reduction, farad capacitor C2 voltages
Go up, but since control enable signal output end VDD_EN is low level, the second triode Q2, third transistor Q3 are connected,
11st current-limiting resistance R11 short circuits, VDET=+5V_Core*R2/ (R1+R2) at this time, VDET increase with+5V_Core and
Increase, but due to when+5V_Core increases to maximum value VDET do not reach the PJ7022 voltage comparison points of chip U1 also, therefore control
Enable signal output end VDD_EN processed is low level always, and load power source can not rework, and oscillation is prevented to reach
Effect.
It is to be illustrated to the preferable implementation of the present invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations or be replaced under the premise of without prejudice to spirit of that invention
It changes, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of anti-load power source oscillating circuit for farad capacitor backup power supply, which is characterized in that the circuit includes anti-
Oscillation control circuit, power-fail detection circuit and charge-discharge circuit；
The power-fail detection circuit connects charge-discharge circuit, and the charge-discharge circuit connects anti-oscillation control circuit；
The anti-oscillation control circuit is for connecting load power source.
2. a kind of anti-load power source oscillating circuit for farad capacitor backup power supply, feature exist according to claim 1
In the anti-oscillation control circuit further includes the first diode, filter capacitor, the first triode, the second triode, the first partial pressure
Resistance, the second divider resistance, third divider resistance, the 4th divider resistance, the 5th divider resistance, the 6th current-limiting resistance, on the 7th
Pull-up resistor, the 8th current-limiting resistance, the 9th current-limiting resistance；
The third divider resistance is connect with the emitter of the first triode, the base of the 6th current-limiting resistance and the first triode
Pole connects, and the other end of the 6th current-limiting resistance connect with the collector of the second triode, the 9th current-limiting resistance also with
The collector of second triode connects, the other end ground connection of the 9th current-limiting resistance, the 8th current-limiting resistance and the two or three
The base stage of pole pipe connects, and the 7th pull-up resistor is connect with the emitter of the second triode, the 7th current-limiting resistance it is another
One end is connect with the anode of the first diode, and the cathode of first diode divides electricity with the 5th divider resistance, the 5th respectively
The other end of resistance is grounded.
3. a kind of anti-load power source oscillating circuit for farad capacitor backup power supply, feature exist according to claim 1
In the power-fail detection circuit includes third transistor, the 11st current-limiting resistance, the 12nd divider resistance and the 13rd partial pressure electricity
Resistance；
The base stage of the third transistor is connect with the 11st current-limiting resistance, the collector of the third transistor and the 12nd point
Piezoresistance connects, the 12nd divider resistance and the series connection of the 13rd divider resistance, the other end ground connection of the 13rd divider resistance.
4. a kind of anti-load power source oscillating circuit for farad capacitor backup power supply, feature exist according to claim 1
In the charge-discharge circuit includes the second Schottky diode, third Schottky diode, the 4th Schottky diode, the tenth
Current-limiting resistance and farad capacitor；
The cathode of the third Schottky diode is connect with the tenth current-limiting resistance, the other end of the tenth current-limiting resistance and
The anode connection of four Schottky diodes, the farad capacitor are connect with the anode of the 4th Schottky diode, the farad electricity
The other end of appearance is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145536.0A CN108336786B (en) | 2018-02-11 | 2018-02-11 | Load-proof power supply oscillation circuit for Farad capacitor backup power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145536.0A CN108336786B (en) | 2018-02-11 | 2018-02-11 | Load-proof power supply oscillation circuit for Farad capacitor backup power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108336786A true CN108336786A (en) | 2018-07-27 |
| CN108336786B CN108336786B (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810145536.0A Active CN108336786B (en) | 2018-02-11 | 2018-02-11 | Load-proof power supply oscillation circuit for Farad capacitor backup power supply |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201230199Y (en) * | 2008-07-15 | 2009-04-29 | 北京市研祥兴业国际智能科技有限公司 | Power-down protection circuit |
| CN201887502U (en) * | 2010-11-23 | 2011-06-29 | 成都唐古拉科技有限公司 | Solar power device with overcharging protection circuit |
| CN203069654U (en) * | 2012-12-30 | 2013-07-17 | 深圳市显控自动化技术有限公司 | Power failure detection circuit |
| US20140062200A1 (en) * | 2012-08-30 | 2014-03-06 | Honeywell International Inc. | Capacitive power system having a service life extending approach |
| CN205004821U (en) * | 2015-10-14 | 2016-01-27 | 广州御新软件有限公司 | Backup power supply system |
| CN206922483U (en) * | 2017-07-14 | 2018-01-23 | 河南卓正电子科技有限公司 | A kind of intelligent meter super capacitor power supply circuit |
-
2018
- 2018-02-11 CN CN201810145536.0A patent/CN108336786B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201230199Y (en) * | 2008-07-15 | 2009-04-29 | 北京市研祥兴业国际智能科技有限公司 | Power-down protection circuit |
| CN201887502U (en) * | 2010-11-23 | 2011-06-29 | 成都唐古拉科技有限公司 | Solar power device with overcharging protection circuit |
| US20140062200A1 (en) * | 2012-08-30 | 2014-03-06 | Honeywell International Inc. | Capacitive power system having a service life extending approach |
| CN203069654U (en) * | 2012-12-30 | 2013-07-17 | 深圳市显控自动化技术有限公司 | Power failure detection circuit |
| CN205004821U (en) * | 2015-10-14 | 2016-01-27 | 广州御新软件有限公司 | Backup power supply system |
| CN206922483U (en) * | 2017-07-14 | 2018-01-23 | 河南卓正电子科技有限公司 | A kind of intelligent meter super capacitor power supply circuit |
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| CN108336786B (en) | 2020-05-12 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: An Anti load Power Supply Oscillation Circuit for Farad Capacitor Backup Power Supply Granted publication date: 20200512 Pledgee: Shenzhen Rural Commercial Bank Co.,Ltd. Shenzhen Shantou Special Cooperation Zone Branch Pledgor: SHENZHEN SAMKOON TECHNOLOGY Corp.,Ltd. Registration number: Y2024980009185 |
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