CN204205547U - A kind of current foldback circuit for large power supply input - Google Patents
A kind of current foldback circuit for large power supply input Download PDFInfo
- Publication number
- CN204205547U CN204205547U CN201420737540.3U CN201420737540U CN204205547U CN 204205547 U CN204205547 U CN 204205547U CN 201420737540 U CN201420737540 U CN 201420737540U CN 204205547 U CN204205547 U CN 204205547U
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- input
- current foldback
- large power
- 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.)
- Active
Links
- 230000001939 inductive effect Effects 0.000 claims abstract description 11
- 239000011324 bead Substances 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a kind of current foldback circuit, particularly the comparatively accurate current foldback circuit for large power supply input of a kind of quick acting, control range.Its structure comprises and is serially connected in overcurrent inductive reactance between power input and load end and high-power MOS tube; overcurrent protection chip is also connected with between described power input and high-power MOS tube; described overcurrent protection chip is connected with magnetic bead, and described magnetic bead connects the circuit between power input and overcurrent inductive reactance.A kind of current foldback circuit for large power supply input of the present utility model; it can ensure the safety of large power supply and power consumption equipment thereof; improve the reliability and stability of large power supply; under emergency situations, maximum protective circuit, avoids board to suffer the breaking-up of unrepairable.
Description
Technical field
The utility model relates to a kind of current foldback circuit, particularly the comparatively accurate current foldback circuit for large power supply input of a kind of quick acting, control range.
Background technology
In general electronic equipment; the fail safe of power supply unit receives much concern; because it is not only related to the performance of power supply unit itself; larger impact can be produced on power consumption equipment simultaneously; once there are abnormal conditions, input current exceedes rated current, if do not have overcurrent protection measure; whole system may all can be damaged, and therefore the interpolation of current foldback circuit is most important.
The protective circuit of general purpose fuse conventional in circuit, has the effect of overcurrent protection, but overcurrent reflection is comparatively blunt, and accuracy is not high, is not suitable for using under requiring to react quick, that accuracy is higher occasion.
Along with development and the progress of IC industry, many chip manufacturers such as Linear, TI etc. are proposed some overcurrent protection chips, and these chips not only make external circuits more simple, and function obtains and enriches greatly simultaneously.
Summary of the invention
In order to solve the problem of prior art; the utility model provides a kind of current foldback circuit for large power supply input; it can ensure the safety of large power supply and power consumption equipment thereof; improve the reliability and stability of large power supply; under emergency situations, maximum protective circuit, avoids board to suffer the breaking-up of unrepairable.
The technical scheme that the utility model adopts is as follows:
A kind of current foldback circuit for large power supply input; comprise and be serially connected in overcurrent inductive reactance between power input and load end and high-power MOS tube; overcurrent protection chip is also connected with between described power input and high-power MOS tube; overcurrent protection chip is connected with magnetic bead, and described magnetic bead connects the circuit between power input and overcurrent inductive reactance.
Overcurrent protection chip is connected with overvoltage crowbar.
Overcurrent protection chip is connected with reboot time and arranges circuit.
The beneficial effect that the technical scheme that the utility model provides is brought is:
The utility model can be used for large power supply input, when power consumption equipment end or power supply work itself occur extremely and cause input electric current sharply to increase above rated current, to cut off the electricity supply input, thus allow power source internal circuit quit work, avoid power source internal device or power consumption equipment end to be burnt due to overcurrent.After certain hour (can set), after testing circuit is normal, subnormally again can reopen power supply input, the normal supplying power for outside of power supply.This utility model farthest ensure that the safety of large power supply and power consumption equipment thereof, improves the reliability and stability of large power supply, and under emergency situations, maximum protective circuit, avoids board to suffer the breaking-up of unrepairable.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic block circuit diagram of a kind of current foldback circuit for large power supply input of the present utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
Embodiment one
A kind of current foldback circuit for large power supply input; comprise and be serially connected in overcurrent inductive reactance between power input and load end and high-power MOS tube; overcurrent protection chip is also connected with between described power input and high-power MOS tube; overcurrent protection chip is connected with magnetic bead, and described magnetic bead connects the circuit between power input and overcurrent inductive reactance.
Overcurrent protection chip is connected with overvoltage crowbar.
Overcurrent protection chip is connected with reboot time and arranges circuit.
The current foldback circuit of the present embodiment, use overcurrent protection chip for LTC1910, as shown in Figure 1.
When power supply normally works, power input Vi through inductive reactance, because the setting threshold at now inductive reactance two ends does not have over proof threshold value; the phenomenon of overvoltage do not detected simultaneously; overcurrent protection chip normally can open high-power MOS tube, arrives load end, to using electricity system normal power supply.
When power supply itself or power consumption equipment occur abnormal, after making the over proof input current of input current, the voltage at inductive reactance two ends can exceed set threshold value, and overcurrent protection chip can close high-power MOS tube, and Vi stops powering to power source internal, after regular hour t, time t can arrange circuit by reboot time and arrange, and whether overcurrent protection chip still can exist overcurrent in this detection, if after overcurrent eliminating, chip can re-power, and Vi can at this bio-occlusion Power supply; If same overvoltage circuit is triggered, the output pin of chip is set to low level, and Vi stops powering to power source internal equally, maximum protection power source and power consumption equipment.
Wherein magnetic bead is used for eliminating the phenomenon that spike burr causes false triggering, improves the reliability and stability of power circuit.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. the current foldback circuit for large power supply input; comprise and be serially connected in overcurrent inductive reactance between power input and load end and high-power MOS tube; overcurrent protection chip is also connected with between described power input and high-power MOS tube; it is characterized in that; described overcurrent protection chip is connected with magnetic bead, and described magnetic bead connects the circuit between power input and overcurrent inductive reactance.
2. a kind of current foldback circuit for large power supply input according to claim 1, is characterized in that, described overcurrent protection chip is connected with overvoltage crowbar.
3. a kind of current foldback circuit for large power supply input according to claim 1, is characterized in that, described overcurrent protection chip is connected with reboot time and arranges circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420737540.3U CN204205547U (en) | 2014-12-01 | 2014-12-01 | A kind of current foldback circuit for large power supply input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420737540.3U CN204205547U (en) | 2014-12-01 | 2014-12-01 | A kind of current foldback circuit for large power supply input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204205547U true CN204205547U (en) | 2015-03-11 |
Family
ID=52663467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420737540.3U Active CN204205547U (en) | 2014-12-01 | 2014-12-01 | A kind of current foldback circuit for large power supply input |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204205547U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119661A (en) * | 2015-07-20 | 2015-12-02 | 上海斐讯数据通信技术有限公司 | Multichannel load sharing power supply system |
| CN107562166A (en) * | 2017-08-25 | 2018-01-09 | 维沃移动通信有限公司 | Connection method, mobile terminal and the computer-readable recording medium of external equipment |
-
2014
- 2014-12-01 CN CN201420737540.3U patent/CN204205547U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119661A (en) * | 2015-07-20 | 2015-12-02 | 上海斐讯数据通信技术有限公司 | Multichannel load sharing power supply system |
| CN107562166A (en) * | 2017-08-25 | 2018-01-09 | 维沃移动通信有限公司 | Connection method, mobile terminal and the computer-readable recording medium of external equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204068246U (en) | A kind of low pressure drop low-power dissipation power supply protective circuit | |
| CN102340246A (en) | Thick-film magnetic isolation direct current solid-state power controller | |
| CN105068636A (en) | Anti-shock surge circuit applied to ruggedized computer | |
| CN105633905A (en) | Overvoltage and under-voltage protection circuit | |
| CN201797293U (en) | Anti-surge protection circuit for aviation direct current power supply | |
| CN204205547U (en) | A kind of current foldback circuit for large power supply input | |
| CN203398780U (en) | Vehicle-mounted anti-surge-voltage protection device | |
| CN103529281B (en) | Voltage detecting circuit, electronic equipment and the automobile of the real-time OBD of a kind of all standing | |
| CN202679748U (en) | LED driving power supply circuit | |
| CN101309004A (en) | Overcurrent protection circuit | |
| CN106300248B (en) | A kind of under-voltage protecting circuit of current control mode | |
| CN203826946U (en) | Cell explosionproof circuit and cell charging circuit | |
| CN206977024U (en) | A kind of overcurrent-overvoltage protecting circuit | |
| CN106099862B (en) | A kind of low-voltage protection method based on multimode input-series and output-parallel structure | |
| CN205960624U (en) | Switch power -supply overvoltage protecting circuit | |
| CN201594506U (en) | Relay socket with built-in circuit | |
| CN103779838A (en) | Switching power supply management circuit system | |
| CN101719655A (en) | Real-time status monitoring and overvoltage protecting control device | |
| CN204993070U (en) | Can realize undervoltage protection's switching power supply | |
| CN203191869U (en) | Voltage stabilizing power supply with open-circuit monitoring function | |
| CN205141621U (en) | Protective circuit | |
| CN105790207A (en) | High-power cut-off type safety barrier | |
| CN204719168U (en) | A kind of current anomaly checking circuit | |
| CN105048433A (en) | Surge protection design method for DC-DC power supply | |
| CN204464948U (en) | A kind of on-vehicle safety circuit controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230529 Address after: 250000 building S02, No. 1036, Langchao Road, high tech Zone, Jinan City, Shandong Province Patentee after: Shandong Inspur Scientific Research Institute Co.,Ltd. Address before: No. 1036, Shandong high tech Zone wave road, Ji'nan, Shandong Patentee before: INSPUR GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right |