CN107707111A - A kind of capacitor voltage equalizing circuit and circuit - Google Patents
A kind of capacitor voltage equalizing circuit and circuit Download PDFInfo
- Publication number
- CN107707111A CN107707111A CN201711192189.9A CN201711192189A CN107707111A CN 107707111 A CN107707111 A CN 107707111A CN 201711192189 A CN201711192189 A CN 201711192189A CN 107707111 A CN107707111 A CN 107707111A
- Authority
- CN
- China
- Prior art keywords
- voltage
- power supply
- capacitor
- circuit
- sharing
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 81
- 230000015556 catabolic process Effects 0.000 claims abstract description 8
- 230000002159 abnormal effect Effects 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
-
- 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
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
This application discloses a kind of capacitor voltage equalizing circuit and circuit, the circuit includes：Electric capacity, equalizing resistance, triode and voltage-regulator diode, and the breakdown voltage of voltage-regulator diode is more than the normal working voltage of electric capacity and less than the abnormal work voltage of electric capacity；Wherein one end of electric capacity is connected with the first power end, and the other end is connected with second source end；One end of equalizing resistance is connected with the first power end, the colelctor electrode connection of the other end and triode；The negative electrode of voltage-regulator diode is connected with the first power end, the base stage connection of anode and triode；The emitter stage of triode is connected with second source end.The application voltage-regulator diode only can just turn in Voltage unbalance, and equalizing resistance will not cause power consumption penalty in normal work, reduce stand-by power consumption, also just because of this, the resistance of equalizing resistance can be much smaller than the resistance of equalizing resistance in tradition pressure scheme, excessive deviation will not also so and after the equivalent series resistance parallel connection of electric capacity be produced, improves and presses precision.
Description
Technical Field
The invention relates to the technical field of voltage sharing, in particular to a capacitor voltage sharing circuit and a circuit.
Background
In a conventional voltage equalizing circuit, a passive voltage equalizing process is usually performed by using a resistor device. As shown in fig. 1, the voltage-sharing resistor R1 is directly connected in parallel to two ends of the capacitor C1, and the voltage-sharing resistor R2 is directly connected in parallel to two ends of the capacitor C2, so that when the voltage-sharing circuit works, the voltage-sharing resistors R1 and R2 are both directly in a working state, and generate a lot of power consumption, thereby seriously affecting the whole standby power consumption of the circuit. In order to reduce the power consumption of the voltage equalizing resistor as much as possible, people tend to use the voltage equalizing resistor with a large resistance value in the prior art, however, the accuracy of the resistor is affected by the large resistance value on the one hand, and a larger deviation is caused by the parallel connection of the voltage equalizing resistor with the large resistance value and the equivalent series impedance of the capacitor on the other hand, so that the accuracy of voltage equalizing is seriously affected.
In summary, it can be seen that how to reduce the standby power consumption on the voltage equalizing line and improve the voltage equalizing precision is a problem to be solved urgently.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a capacitor voltage equalizing circuit and a circuit thereof, which can greatly reduce standby power consumption on the voltage equalizing circuit and improve voltage equalizing precision. The specific scheme is as follows:
in a first aspect, the invention discloses a capacitor voltage-sharing circuit, which comprises a capacitor, a voltage-sharing resistor, a triode and a voltage-stabilizing diode, wherein the breakdown voltage of the voltage-stabilizing diode is greater than the normal working voltage of the capacitor and less than the abnormal working voltage of the capacitor; wherein,
one end of the capacitor is connected with the first power supply end, and the other end of the capacitor is connected with the second power supply end; one end of the voltage-sharing resistor is connected with the first power supply end, and the other end of the voltage-sharing resistor is connected with the collector of the triode; the cathode of the voltage stabilizing diode is connected with the first power supply end, and the anode of the voltage stabilizing diode is connected with the base electrode of the triode; and the emitter of the triode is connected with the second power supply end.
Optionally, the first power supply terminal is a positive power supply input terminal, and the second power supply terminal is a negative power supply input terminal.
Optionally, the first power supply terminal is a negative power supply input terminal, and the second power supply terminal is a ground terminal.
Optionally, the capacitor voltage-sharing circuit further includes a current-limiting resistor, wherein an anode of the zener diode is connected to a base of the triode through the current-limiting resistor.
Optionally, the capacitor voltage-sharing circuit further includes a current-limiting resistor, wherein an emitter of the triode is connected to the second power supply terminal through the current-limiting resistor.
In a second aspect, the invention also discloses a capacitor voltage-sharing circuit, which comprises two capacitor voltage-sharing circuits disclosed in the foregoing; the first power supply end and the second power supply end in the first capacitor voltage-sharing circuit are respectively a positive power supply input end and a negative power supply input end, and the first power supply end and the second power supply end in the second capacitor voltage-sharing circuit are respectively a negative power supply input end and a grounding end.
Optionally, a corresponding current-limiting resistor is arranged between the zener diode and the triode in each capacitor voltage-sharing circuit.
Optionally, a corresponding current-limiting resistor is disposed between the triode in each capacitor voltage-sharing circuit and the second power supply terminal.
In a third aspect, the invention further discloses a power supply, which comprises the capacitor voltage equalizing circuit disclosed in the foregoing.
Therefore, after the capacitor voltage-sharing circuit is put into use, if the voltage of the capacitor is abnormal, the working voltage of the capacitor is greater than the breakdown voltage of the voltage-sharing diode, so that the voltage-sharing diode is broken down and conducted, the triode is conducted, the voltage-sharing resistor and the capacitor can be connected in parallel, the equivalent series impedance of the capacitor is reduced, the voltage obtained at the two ends of the capacitor is reduced, and after the working voltage of the capacitor is recovered to be normal, the voltage-sharing diode is recovered to be in a cut-off state because the working voltage of the capacitor is less than the breakdown voltage of the voltage-sharing diode, so that the triode is recovered to be in the cut-off state, the voltage-sharing resistor and the capacitor can not be connected in parallel, and the original normal voltage-sharing state is recovered. Therefore, the voltage stabilizing diode in the invention can be conducted only under the condition of unbalanced voltage, so that active voltage-sharing treatment is realized, voltage-sharing precision is favorably improved, and the voltage-sharing resistor does not cause loss in power consumption when the whole capacitor voltage-sharing circuit normally works, so that standby power consumption in the voltage-sharing process is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional grading circuit;
FIG. 2 is a diagram of a capacitor voltage equalizing circuit according to the present invention;
FIG. 3 is a diagram of a specific capacitor voltage equalizing circuit according to the present invention;
FIG. 4 is a diagram of a specific capacitor voltage equalizing circuit according to the present invention;
fig. 5 is a diagram of a capacitor voltage-sharing circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a capacitor voltage-sharing circuit, which is shown in figure 2 and comprises a capacitor C, a voltage-sharing resistor R, a triode Q and a voltage-stabilizing diode ZD, wherein the breakdown voltage of the voltage-stabilizing diode ZD is greater than the normal working voltage of the capacitor C and less than the abnormal working voltage of the capacitor C; wherein,
one end of the capacitor C is connected with the first power supply end, and the other end of the capacitor C is connected with the second power supply end; one end of the voltage-sharing resistor R is connected with a first power supply end, and the other end of the voltage-sharing resistor R is connected with a collector of the triode Q; the cathode of the voltage stabilizing diode ZD is connected with a first power supply end, and the anode of the voltage stabilizing diode ZD is connected with the base electrode of the triode Q; the emitter of the triode Q is connected with the second power supply end.
In one embodiment, the first power supply terminal may be a positive power supply input terminal, and correspondingly, the second power supply terminal may be a negative power supply input terminal.
In another embodiment, the first power supply terminal may be a negative power supply input terminal, and the second power supply terminal may be a ground terminal.
Referring to fig. 3, the capacitor voltage equalizing circuit in this embodiment may further include a current limiting resistor R0, wherein the anode of the zener diode ZD is connected to the base of the transistor through the current limiting resistor R0.
Of course, the current limiting resistor R0 may also be disposed between the transistor Q and the second power source terminal, that is, the emitter of the transistor Q is connected to the second power source terminal through the current limiting resistor R0, as shown in fig. 4.
Therefore, after the capacitor voltage-sharing circuit in the embodiment of the invention is put into use, if the voltage of the capacitor is abnormal, the working voltage of the capacitor is greater than the breakdown voltage of the voltage-sharing diode, so that the voltage-sharing diode is broken down and conducted, and the triode is conducted, so that the voltage-sharing resistor and the capacitor are in a parallel connection relationship, the equivalent series impedance of the capacitor is reduced, the voltage obtained at two ends of the capacitor is reduced, and after the working voltage of the capacitor is recovered to be normal, the voltage-sharing diode is recovered to be in a cut-off state because the working voltage of the capacitor is less than the breakdown voltage of the voltage-sharing diode, so that the triode is recovered to be in the cut-off state, and the voltage-sharing resistor and the capacitor are not connected in parallel, and the original normal. Therefore, the voltage stabilizing diode in the embodiment of the invention can be conducted only under the condition of unbalanced voltage, so that the active voltage-sharing treatment is realized, the voltage-sharing precision is favorably improved, and the voltage-sharing resistor does not cause loss in power consumption when the whole capacitor voltage-sharing circuit normally works, so that the standby power consumption in the voltage-sharing process is reduced.
Further, an embodiment of the present invention further discloses a capacitor voltage equalizing circuit, which is shown in fig. 5 and includes two capacitor voltage equalizing circuits disclosed in the foregoing embodiments; the first power supply end and the second power supply end in the first capacitor voltage-sharing circuit are respectively a positive power supply input end VIN + and a negative power supply input end VIN-, and the first power supply end and the second power supply end in the second capacitor voltage-sharing circuit are respectively a negative power supply input end VIN-and a ground end GND.
In fig. 5, a current limiting resistor R12 and a current limiting resistor R22 are respectively arranged between the zener diode and the transistor in each capacitor voltage equalizing circuit. Of course, in the embodiment of the present invention, a corresponding current limiting resistor may be disposed between the transistor and the second power supply terminal in each capacitor voltage equalizing circuit.
Furthermore, the invention also discloses a power supply which comprises the capacitor voltage-sharing circuit. It is to be understood that the above power supply may be widely applied to various electronic devices such as a display device, a communication device, and the like. For a more specific structure of the circuit, reference may be made to the corresponding contents disclosed in the foregoing embodiments, and details are not repeated here.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The capacitor voltage-sharing circuit and the circuit provided by the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. A capacitor voltage-sharing circuit is characterized by comprising a capacitor, a voltage-sharing resistor, a triode and a voltage-stabilizing diode, wherein the breakdown voltage of the voltage-stabilizing diode is greater than the normal working voltage of the capacitor and less than the abnormal working voltage of the capacitor; wherein,
one end of the capacitor is connected with the first power supply end, and the other end of the capacitor is connected with the second power supply end; one end of the voltage-sharing resistor is connected with the first power supply end, and the other end of the voltage-sharing resistor is connected with the collector of the triode; the cathode of the voltage stabilizing diode is connected with the first power supply end, and the anode of the voltage stabilizing diode is connected with the base electrode of the triode; and the emitter of the triode is connected with the second power supply end.
2. Capacitor voltage grading circuit according to claim 1,
the first power supply end is a positive power supply input end, and the second power supply end is a negative power supply input end.
3. Capacitor voltage grading circuit according to claim 1,
the first power supply end is a negative power supply input end, and the second power supply end is a grounding end.
4. A capacitor grading circuit according to any of claims 1 to 3, further comprising a current limiting resistor, wherein the anode of the zener diode is connected to the base of the transistor via the current limiting resistor.
5. A capacitor voltage equalizing circuit according to any one of claims 1 to 3, further comprising a current limiting resistor, wherein the emitter of said transistor is connected to said second power supply terminal via said current limiting resistor.
6. A capacitor grading circuit comprising two capacitor grading circuits according to claim 1; the first power supply end and the second power supply end in the first capacitor voltage-sharing circuit are respectively a positive power supply input end and a negative power supply input end, and the first power supply end and the second power supply end in the second capacitor voltage-sharing circuit are respectively a negative power supply input end and a grounding end.
7. The capacitor grading circuit according to claim 6, wherein a respective current limiting resistor is provided between the zener diode and the transistor in each capacitor grading circuit.
8. A capacitor grading circuit according to claim 6, wherein a respective current limiting resistor is provided between the transistor of each capacitor grading circuit and the second power supply terminal.
9. A power supply comprising a capacitor grading circuit as claimed in any of claims 6 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711192189.9A CN107707111A (en) | 2017-11-24 | 2017-11-24 | A kind of capacitor voltage equalizing circuit and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711192189.9A CN107707111A (en) | 2017-11-24 | 2017-11-24 | A kind of capacitor voltage equalizing circuit and circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107707111A true CN107707111A (en) | 2018-02-16 |
Family
ID=61185435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711192189.9A Pending CN107707111A (en) | 2017-11-24 | 2017-11-24 | A kind of capacitor voltage equalizing circuit and circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107707111A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777572A (en) * | 2018-05-28 | 2018-11-09 | 四川斐讯信息技术有限公司 | A kind of semiconductor tube protective circuit and method |
| CN110677035A (en) * | 2019-10-07 | 2020-01-10 | 深圳市金威源科技股份有限公司 | Capacitor voltage-sharing circuit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004222438A (en) * | 2003-01-16 | 2004-08-05 | Toshiba Corp | Voltage balance equalization circuit for electric double-layer capacitor |
| CN2888719Y (en) * | 2006-01-09 | 2007-04-11 | 周海 | Battery-charging balancing circuit |
| CN201682417U (en) * | 2010-04-29 | 2010-12-22 | 湖南文理学院 | Power supply protection circuit based on super capacitor |
| CN102801195A (en) * | 2012-08-14 | 2012-11-28 | 三一重工股份有限公司 | Vehicle battery protection device and vehicle |
| CN103595102A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Novel super capacitor voltage equalizing circuit |
| CN203537230U (en) * | 2013-11-08 | 2014-04-09 | 南京志卓电子科技有限公司 | Capacitor series-connected equalizing circuit |
| CN104391535A (en) * | 2014-11-21 | 2015-03-04 | 常熟开关制造有限公司(原常熟开关厂） | Method and device for equalizing voltage of DC bus capacitor |
| CN204333983U (en) * | 2015-01-14 | 2015-05-13 | 潍坊凯纳电气科技有限公司 | Wireless temperature-measuring sensor electric supply installation |
-
2017
- 2017-11-24 CN CN201711192189.9A patent/CN107707111A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004222438A (en) * | 2003-01-16 | 2004-08-05 | Toshiba Corp | Voltage balance equalization circuit for electric double-layer capacitor |
| CN2888719Y (en) * | 2006-01-09 | 2007-04-11 | 周海 | Battery-charging balancing circuit |
| CN201682417U (en) * | 2010-04-29 | 2010-12-22 | 湖南文理学院 | Power supply protection circuit based on super capacitor |
| CN102801195A (en) * | 2012-08-14 | 2012-11-28 | 三一重工股份有限公司 | Vehicle battery protection device and vehicle |
| CN203537230U (en) * | 2013-11-08 | 2014-04-09 | 南京志卓电子科技有限公司 | Capacitor series-connected equalizing circuit |
| CN103595102A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Novel super capacitor voltage equalizing circuit |
| CN104391535A (en) * | 2014-11-21 | 2015-03-04 | 常熟开关制造有限公司(原常熟开关厂） | Method and device for equalizing voltage of DC bus capacitor |
| CN204333983U (en) * | 2015-01-14 | 2015-05-13 | 潍坊凯纳电气科技有限公司 | Wireless temperature-measuring sensor electric supply installation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777572A (en) * | 2018-05-28 | 2018-11-09 | 四川斐讯信息技术有限公司 | A kind of semiconductor tube protective circuit and method |
| CN108777572B (en) * | 2018-05-28 | 2021-12-14 | 上海领矽半导体有限公司 | Semiconductor tube protection circuit and method |
| CN110677035A (en) * | 2019-10-07 | 2020-01-10 | 深圳市金威源科技股份有限公司 | Capacitor voltage-sharing circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107707111A (en) | A kind of capacitor voltage equalizing circuit and circuit | |
| EP2672597A1 (en) | Voltage rectifier | |
| WO2016092789A1 (en) | Fault detection circuit | |
| JP2013121203A (en) | Surge voltage protection circuit | |
| CN108879616A (en) | A kind of capacitor ripple current protective device, method and air conditioner | |
| CN210350769U (en) | Overcurrent, overvoltage and undervoltage protection circuit | |
| CN110994960A (en) | Power supply circuit and current sharing method | |
| US20110069423A1 (en) | Protection circuit for over-current and short protection | |
| CN109461730B (en) | Electrostatic protection circuit and electrostatic protection device | |
| CN108418301B (en) | Automatic switching circuit of dual power input | |
| CN212380941U (en) | Overvoltage and surge protection circuit and electronic equipment | |
| CN108803766A (en) | Controller operating voltage manages system | |
| CN214380078U (en) | Electric impact current suppression circuit on airborne display | |
| US20120013414A1 (en) | Crystal oscillator circuit for adjusting resonant frequency of crystal oscillator | |
| CN210112027U (en) | Network communication system | |
| JP2012095446A (en) | Power supply unit and withstand voltage test method therefor | |
| CN105867225B (en) | Load control circuit and its control method | |
| CN205265224U (en) | Current foldback circuit | |
| CN204992558U (en) | PROFIBUSPA bus instrumentation's current foldback circuit | |
| CN205507464U (en) | Loaded control circuit | |
| CN103546126A (en) | Low noise relay circuit | |
| CN110971112A (en) | Power supply device, electric appliance, and filter circuit | |
| JP6607562B2 (en) | POWER PROTECTION DEVICE, AIR CONDITIONING SYSTEM INCLUDING THE SAME, AND METHOD FOR PRODUCING POWER SUPPLY PROTECTION DEVICE | |
| CN212323719U (en) | Capacitor series voltage-sharing circuit | |
| CN104253603A (en) | Portable electronic device and application method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180216 |