CN108923378A - A kind of Width funtion apparatus for protecting power supply for stereo set - Google Patents
A kind of Width funtion apparatus for protecting power supply for stereo set Download PDFInfo
- Publication number
- CN108923378A CN108923378A CN201810869815.1A CN201810869815A CN108923378A CN 108923378 A CN108923378 A CN 108923378A CN 201810869815 A CN201810869815 A CN 201810869815A CN 108923378 A CN108923378 A CN 108923378A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- protecting
- power supply
- over
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a kind of Width funtion apparatus for protecting power supply for stereo set, wherein the protective device includes：Reverse-connection protection circuit, enabled control circuit, overheating protection circuit, current foldback circuit, over-voltage or under-voltage protecting circuit and DC-DC conversion circuit；Wherein, the output end of reverse-connection protection circuit is connected with enabled control circuit, overheating protection circuit, current foldback circuit and over-voltage or under-voltage protecting circuit respectively；Enabled control circuit is connected with overheating protection circuit and current foldback circuit respectively；Overheating protection circuit is connected with the output end of current foldback circuit respectively for over-voltage or under-voltage protecting circuit；The output end of over-voltage or under-voltage protecting circuit is connected with DC-DC circuit.In embodiments of the present invention, it is protected with stereo set using Width funtion apparatus for protecting power supply in Width funtion power supply, the fast cut-off circuit when Width funtion supply voltage is too low or excessively high protects stereo set not to be damaged.
Description
Technical field
The present invention relates to Width funtion power protection field more particularly to a kind of Width funtion power supplys for stereo set
Protective device.
Background technique
Stereo set is by source of sound (music player devices, pick up facility i.e. microphone), control equipment (analog or digital tuning
Platform), audio processor (be all with the peripheries such as effect device, balanced device, compressor, frequency divider, signal distributor, delayer in the past
Equipment, there are also the digital system controllers of integrated above each function now), power amplifier (power amplifier), speaker composition.
Because of the progress of technology and the demand of people, more and more occur mobile stereo set currently on the market, these
The power supply of mobile stereo set is mobile DC power supply (i.e. battery supply power supply), the voltage of DC power supply on the market
Range is different, and relatively common voltage has between 4-75V, in order to adapt to the supply voltage of common power supply output,
Corresponding protective device is fitted on general stereo set, these protective devices were generally too simply at that time, protected energy
Power is weaker, is difficult quickly to sign circuit in over-voltage to biggish Width funtion, is protected to stereo set, often made accordingly
At the damage of stereo set to varying degrees.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, and the present invention provides a kind of width electricity for stereo set
Piezoelectricity electrical source protecting equipment, the fast cut-off circuit when Width funtion supply voltage is too low or excessively high, protects stereo set not to be damaged.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of Width funtion power supply guarantors for stereo set
Protection unit, the protective device include：Reverse-connection protection circuit, enabled control circuit, overheating protection circuit, current foldback circuit,
Over-voltage or under-voltage protecting circuit and DC-DC conversion circuit；
Wherein, the output end of the reverse-connection protection circuit respectively with the enabled control circuit, the overheating protection circuit,
The current foldback circuit is connected with the over-voltage or under-voltage protecting circuit；The enabled control circuit respectively with the overheat
Protection circuit is connected with the current foldback circuit；The over-voltage or under-voltage protecting circuit distinguish the overheating protection circuit and
The output end of the current foldback circuit is connected；The output end of the over-voltage or under-voltage protecting circuit and the DC-DC circuit
It is connected.
Optionally, the enabled control circuit is made of three-level CMOS inverter；The enabled control circuit is for generating
First enable signal and the second enable signal；The overheating protection circuit is controlled by the first enable signal, passes through
Two enable signals control the current foldback circuit.
Optionally, the over-voltage or under-voltage protecting circuit include transforming circuit, rectification circuit, filter circuit, voltage regulator circuit,
Voltage sampling circuit and control circuit；
Wherein, the transforming circuit, the rectification circuit, the filter circuit, the voltage regulator circuit and control electricity
Road is sequentially connected in series；The input terminal of the voltage sampling circuit is connected with the rectification circuit, the voltage sampling circuit
Output end described in control circuit be connected.
Optionally, the output end of the overheating protection circuit and the control electricity in the over-voltage or under-voltage protecting circuit
Road is connected；The output end of the current foldback circuit is connected with the control circuit in the over-voltage or under-voltage protecting circuit
It connects.
Optionally, the overheating protection circuit uses triode as temperature-sensing element (device), first enable signal
Overheating protection voltage is generated by the overheating protection circuit, the control circuit is controlled.
Optionally, the input terminal of the reverse-connection protection circuit is connected with the output end of power supply；The DC-DC conversion circuit
Output end be connected with the input terminal of stereo set.
In embodiments of the present invention, reverse-connection protection circuit, enabled control circuit, overheating protection circuit, current foldback circuit,
The Width funtion apparatus for protecting power supply of over-voltage or under-voltage protecting circuit and DC-DC conversion circuit composition, in Width funtion power supply and sound equipment
Equipment is protected using the Width funtion apparatus for protecting power supply, quickly cuts off electricity when Width funtion supply voltage is too low or excessively high
Road protects stereo set not to be damaged, and compared to traditional Width funtion apparatus for protecting power supply, which increases enabled control
Circuit, overheating protection circuit and current foldback circuit processed, by can control circuit control current foldback circuit and overheating protection
Circuit protects Width funtion apparatus for protecting power supply overcurrent or overheat.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it is clear that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is that the apparatus structure composition of the Width funtion apparatus for protecting power supply for stereo set in the embodiment of the present invention shows
It is intended to；
Fig. 2 is the circuit structure composition schematic diagram of the over-voltage or under-voltage protecting circuit in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the device of the Width funtion apparatus for protecting power supply for stereo set in the embodiment of the present invention
Structure composition schematic diagram.
As shown in Figure 1, the embodiment of the invention provides a kind of Width funtion apparatus for protecting power supply for stereo set, it is described
Protective device includes：Reverse-connection protection circuit, enabled control circuit, overheating protection circuit, current foldback circuit, over-voltage or under-voltage guarantor
Protection circuit and DC-DC conversion circuit；Wherein, the output end of the reverse-connection protection circuit respectively with the enabled control circuit, institute
State overheating protection circuit, the current foldback circuit is connected with the over-voltage or under-voltage protecting circuit；It is described to make to can control electricity
Road is connected with the overheating protection circuit and the current foldback circuit respectively；The over-voltage or under-voltage protecting circuit distinguish institute
Overheating protection circuit is stated to be connected with the output end of the current foldback circuit；The output end of the over-voltage or under-voltage protecting circuit
It is connected with the DC-DC circuit.
In implementation process of the present invention, enabled control circuit generates the overheat that corresponding enable signal is connected for it and protects
Protection circuit and current foldback circuit are controlled accordingly, for example are generated the first enable signal and controlled to overheating protection circuit
System generates the second enable signal and controls current foldback circuit；Width funtion power protection is detected in overheating protection circuit
Circuit structure in device is logical there are the first enable signal control overheating protection circuit generation cutting circuit under overheat condition, is issued
Road protects the signal of circuit safety in the control circuit into over-voltage or under-voltage protecting circuit, and control circuit passes through its inside
Trigger cuts off the access of Width funtion apparatus for protecting power supply, and the circuit in Width funtion apparatus for protecting power supply is protected in realization；
If current foldback circuit detects the circuit in Width funtion apparatus for protecting power supply, there are overcurrent conditions, enable control circuit to overcurrent
Circuit is protected to send the second enable signal, control current foldback circuit generates the signal of cutting circuit protection circuit safety to over-voltage
Or in the control circuit in under-voltage protecting circuit, control circuit cuts off Width funtion apparatus for protecting power supply by its internal trigger
Access, realization the circuit in Width funtion apparatus for protecting power supply is protected.
In the specific implementation process, the signal for the cutting circuit that overheating protection circuit and current foldback circuit generate can not
By controller, the trigger directly into controller is sent, and control trigger cuts off the access of circuit, may be implemented so more
The quickly access of cutting circuit, realizes the protection to circuit, also realizes and quickly protect to the stereo set of electricity consumption.
Specifically, enabled control circuit is made of three-level CMOS inverter, it is enabled for generating first to enable control circuit
Signal and the second enable signal；The overheating protection circuit is controlled by the first enable signal, passes through the second enabled letter
Number the current foldback circuit is controlled；Three-level CMOS inverter be in order to prevent due to the first enable signal of generation and
Second enable signal unstable and the various aspects problem such as cause circuit oscillation, wherein just like the metal-oxide-semiconductor of hysteresis.
Fig. 2 please be consider and examine, Fig. 2 is the circuit structure composition signal of the over-voltage or under-voltage protecting circuit in the embodiment of the present invention
Figure.
As shown in Fig. 2, the circuit structure of over-voltage or under-voltage protecting circuit is as follows：
Specifically, the over-voltage or under-voltage protecting circuit include transforming circuit, rectification circuit, filter circuit, voltage regulator circuit,
Voltage sampling circuit and control circuit；Wherein, the transforming circuit, the rectification circuit, the filter circuit, pressure stabilizing electricity
Road and the control circuit are sequentially connected in series；The input terminal of the voltage sampling circuit is connected with the rectification circuit, institute
Control circuit described in the output end of voltage sampling circuit is stated to be connected.
Specifically, over-voltage or under-voltage protecting circuit pass through transforming circuit, rectification circuit, filter circuit, voltage regulator circuit, voltage
Multiple circuits such as sample circuit and control circuit realize protection, and transforming circuit carries out the transformation of input voltage (when voltage is in circuit
It when in tolerance range, when overtension, that is, is depressured, when overtension, boosts, voltage is kept to work in stereo set
In the threshold range of voltage, wherein threshold value be operating voltage it is positive and negative 5%) rectification circuit rectifies the electric current of input, filter
The noise removal of wave circuit progress circuit signal, the stabilization of voltage regulator circuit holding circuit voltage, voltage sample point road are whole to circuit
Body point sample is sampled, and further includes trigger inside control circuit, and trigger is used to trigger the switch of cutting circuit pathways, control
Access of the circuit for the trigger cutting circuit inside controller.
Specifically, the control electricity in the output end of the overheating protection circuit and the over-voltage or under-voltage protecting circuit
Road is connected；The output end of the current foldback circuit is connected with the control circuit in the over-voltage or under-voltage protecting circuit
It connects；Overheating protection circuit generates the corresponding signal for cutting off circuit to the over-voltage or under-voltage guarantor in the case where circuit overheats
In the control circuit in protection circuit, after the control circuit receives corresponding signal, the signal, control circuit control are responded
Make the access of its internal trigger cutting circuit；Or current foldback circuit, in the case where circuit overcurrent, generation is cut accordingly
In the control circuit into the over-voltage or under-voltage protecting circuit, the control circuit receives accordingly the signal of deenergizing
After signal, the signal is responded, control circuit controls the access of its internal trigger cutting circuit.
Specifically, the overheating protection circuit uses triode as temperature-sensing element (device), first enable signal
Overheating protection voltage is generated by the overheating protection circuit, the control circuit is controlled；The conducting of triode BE knot
Thresholds have negative temperature characteristic, and the control in the over-voltage or under-voltage protecting circuit is outputed signal to by overheating protection circuit
Circuit processed controls the trigger in control circuit.
Specifically, current foldback circuit most importantly samples the circuit in over-voltage or under-voltage protecting circuit,
Current foldback circuit must detect the electric current on over-voltage or under-voltage protecting circuit the moment, so that overcurrent is can quickly to generate overcurrent letter
It number is sent to controller, control trigger cuts off circuit；In the present invention, current foldback circuit carries out electricity using PMOS sampling pipe
Stream sampling.
Specifically, the input terminal of the reverse-connection protection circuit is connected with the output end of power supply；The DC-DC conversion circuit
Output end be connected with the input terminal of stereo set.
In embodiments of the present invention, reverse-connection protection circuit, enabled control circuit, overheating protection circuit, current foldback circuit,
The Width funtion apparatus for protecting power supply of over-voltage or under-voltage protecting circuit and DC-DC conversion circuit composition, in Width funtion power supply and sound equipment
Equipment is protected using the Width funtion apparatus for protecting power supply, quickly cuts off electricity when Width funtion supply voltage is too low or excessively high
Road protects stereo set not to be damaged, and compared to traditional Width funtion apparatus for protecting power supply, which increases enabled control
Circuit, overheating protection circuit and current foldback circuit processed control current foldback circuit and overheating protection by enabled control circuit
Circuit protects Width funtion apparatus for protecting power supply overcurrent or overheat.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include：Read-only memory (ROM, ReadOnly Memory), random access memory (RAM, Random Access
Memory), disk or CD etc..
In addition, be provided for the embodiments of the invention above a kind of Width funtion apparatus for protecting power supply for stereo set into
It has gone and has been discussed in detail, herein should be using a specific example illustrates the principle and implementation of the invention, the above reality
The explanation for applying example is merely used to help understand method and its core concept of the invention；Meanwhile for the general technology of this field
Personnel, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this theory
Bright book content should not be construed as limiting the invention.
Claims (6)
1. a kind of Width funtion apparatus for protecting power supply for stereo set, which is characterized in that the protective device includes：Reversal connection is protected
Protection circuit, enabled control circuit, overheating protection circuit, current foldback circuit, over-voltage or under-voltage protecting circuit and DC-DC conversion electricity
Road；
Wherein, the output end of the reverse-connection protection circuit respectively with the enabled control circuit, overheating protection circuit, described
Current foldback circuit is connected with the over-voltage or under-voltage protecting circuit；The enabled control circuit respectively with the overheating protection
Circuit is connected with the current foldback circuit；The over-voltage or under-voltage protecting circuit distinguish the overheating protection circuit and described
The output end of current foldback circuit is connected；The output end of the over-voltage or under-voltage protecting circuit is connected with the DC-DC circuit
It connects.
2. Width funtion apparatus for protecting power supply according to claim 1, which is characterized in that the enabled control circuit is by three-level
CMOS inverter composition；The enabled control circuit is for generating the first enable signal and the second enable signal；Make by first
Energy signal controls the overheating protection circuit, is controlled by the second enable signal the current foldback circuit.
3. according to right want 1 described in Width funtion apparatus for protecting power supply, which is characterized in that the over-voltage or under-voltage protecting circuit packet
Include transforming circuit, rectification circuit, filter circuit, voltage regulator circuit, voltage sampling circuit and control circuit；
Wherein, the transforming circuit, the rectification circuit, the filter circuit, the voltage regulator circuit and the control circuit according to
Secondary series connection；The input terminal of the voltage sampling circuit is connected with the rectification circuit, the voltage sampling circuit it is defeated
Control circuit described in outlet is connected.
4. Width funtion apparatus for protecting power supply according to claim 3, which is characterized in that the output end of the overheating protection circuit
It is connected with the control circuit in the over-voltage or under-voltage protecting circuit；The output end of the current foldback circuit with it is described
The control circuit in over-voltage or under-voltage protecting circuit is connected.
5. according to right want 4 described in Width funtion apparatus for protecting power supply, which is characterized in that the overheating protection circuit use three
For pole pipe as temperature-sensing element (device), first enable signal generates overheating protection voltage by the overheating protection circuit, right
The control circuit is controlled.
6. according to right want 1 described in Width funtion apparatus for protecting power supply, which is characterized in that the input terminal of the reverse-connection protection circuit
It is connected with the output end of power supply；The output end of the DC-DC conversion circuit is connected with the input terminal of stereo set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869815.1A CN108923378A (en) | 2018-08-01 | 2018-08-01 | A kind of Width funtion apparatus for protecting power supply for stereo set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869815.1A CN108923378A (en) | 2018-08-01 | 2018-08-01 | A kind of Width funtion apparatus for protecting power supply for stereo set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108923378A true CN108923378A (en) | 2018-11-30 |
Family
ID=64394080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810869815.1A Pending CN108923378A (en) | 2018-08-01 | 2018-08-01 | A kind of Width funtion apparatus for protecting power supply for stereo set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108923378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460020A (en) * | 2019-09-02 | 2019-11-15 | 广州番禺巨大汽车音响设备有限公司 | A kind of output protecting device of high-power mobile power source |
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| JP2007288819A (en) * | 2006-04-12 | 2007-11-01 | Ntt Data Ex Techno Corp | Overvoltage/overcurrent protective circuit |
| CN202068536U (en) * | 2011-05-17 | 2011-12-07 | 泾县祥盛科技有限公司 | Integrated circuit board used in audio system |
| CN104113209A (en) * | 2014-08-07 | 2014-10-22 | 深圳市杰和科技发展有限公司 | Power module supporting wide voltage inputting |
| CN205029930U (en) * | 2015-09-29 | 2016-02-10 | 宁波龙源照明电器有限公司 | Stroboscopic LED driver is removed to wide voltage high efficiency of 9 -48V scope |
| CN205356661U (en) * | 2016-02-25 | 2016-06-29 | 张磊 | Wide voltage protection circuit of electric motor car stereo set |
| CN106655083A (en) * | 2016-09-19 | 2017-05-10 | 深圳市康凯斯信息技术有限公司 | Wide voltage power supply protection device and method for electric car vehicle equipment |
| CN106647911A (en) * | 2016-12-27 | 2017-05-10 | 广州中大微电子有限公司 | Multifunctional LDO circuit applicable to low-power-consumption RFID reader |
-
2018
- 2018-08-01 CN CN201810869815.1A patent/CN108923378A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007288819A (en) * | 2006-04-12 | 2007-11-01 | Ntt Data Ex Techno Corp | Overvoltage/overcurrent protective circuit |
| CN202068536U (en) * | 2011-05-17 | 2011-12-07 | 泾县祥盛科技有限公司 | Integrated circuit board used in audio system |
| CN104113209A (en) * | 2014-08-07 | 2014-10-22 | 深圳市杰和科技发展有限公司 | Power module supporting wide voltage inputting |
| CN205029930U (en) * | 2015-09-29 | 2016-02-10 | 宁波龙源照明电器有限公司 | Stroboscopic LED driver is removed to wide voltage high efficiency of 9 -48V scope |
| CN205356661U (en) * | 2016-02-25 | 2016-06-29 | 张磊 | Wide voltage protection circuit of electric motor car stereo set |
| CN106655083A (en) * | 2016-09-19 | 2017-05-10 | 深圳市康凯斯信息技术有限公司 | Wide voltage power supply protection device and method for electric car vehicle equipment |
| CN106647911A (en) * | 2016-12-27 | 2017-05-10 | 广州中大微电子有限公司 | Multifunctional LDO circuit applicable to low-power-consumption RFID reader |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460020A (en) * | 2019-09-02 | 2019-11-15 | 广州番禺巨大汽车音响设备有限公司 | A kind of output protecting device of high-power mobile power source |
| CN110460020B (en) * | 2019-09-02 | 2022-05-17 | 广州番禺巨大汽车音响设备有限公司 | Output protection device of high-power mobile power supply |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181130 |
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| RJ01 | Rejection of invention patent application after publication |