CN207117578U - Protection circuit - Google Patents
Protection circuit Download PDFInfo
- Publication number
- CN207117578U CN207117578U CN201720362724.XU CN201720362724U CN207117578U CN 207117578 U CN207117578 U CN 207117578U CN 201720362724 U CN201720362724 U CN 201720362724U CN 207117578 U CN207117578 U CN 207117578U
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- power supply
- storage capacitor
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- 239000003990 capacitor Substances 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 229910002601 GaN Inorganic materials 0.000 description 14
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 14
- 230000005611 electricity Effects 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 3
- 238000007600 charging Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000018734 Sambucus australis Nutrition 0.000 description 1
- 244000180577 Sambucus australis Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- OGFXBIXJCWAUCH-UHFFFAOYSA-N meso-secoisolariciresinol Natural products C1=2C=C(O)C(OC)=CC=2CC(CO)C(CO)C1C1=CC=C(O)C(OC)=C1 OGFXBIXJCWAUCH-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
A kind of protection circuit, including input power (1), storage capacitor (C), power supply output circuit (2), power-fail detection circuit (3) and processor (4)；Input power is connected with storage capacitor, storage capacitor connection power supply output circuit, input power is used to charge to storage capacitor and to power supply output circuit power supply, storage capacitor is used to after input power power down be separately input into base stage and the drain electrode of power amplifier (100) to power supply output circuit power supply, the voltage of power supply output circuit output；Power-fail detection circuit connects input power; and after input power power down is detected; power down information is sent to processor; after signal of the base stage input voltage of processor output control power amplifier less than or equal to zero to output circuit of powering; the signal that the drain electrode input voltage of output control power amplifier is zero again is to output circuit of powering, to protect power amplifier without damage after a power failure.
Description
Technical field
It the utility model is related to power down protection field, more particularly to a kind of protection circuit.
Background technology
PA is Power Amplifier abbreviation, and Chinese is power amplifier, referred to as " power amplifier ", refers to and is lost given
Under the conditions of sincere, maximum power output can be produced to drive the amplifier of a certain load.Acted on using the current control of triode
Or the voltage control action of FET is converted to the power of power supply in the electric current changed according to input signal.
At present, the application of power amplifier is more and more extensive, and power amplifier is more sensitive to power-off sequential.For example,
GaN (gallium nitride) power amplifier, its application is more and more ripe, and GaN power amplifier is in power down, it is necessary to which its base stage is maintained
After negative pressure, drain electrode (gate) is electrically turn off down again, just can guarantee that GaN power amplifiers are without damage.But if GaN power
The base stage of amplifier and drain electrode can then greatly increase with electricity at present, the impaired possibility of GaN power amplifiers.
Utility model content
The utility model provides a kind of protection circuit.
Specifically, the utility model is achieved by the following technical solution：
A kind of protection circuit, for protecting power amplifier, including input power, storage capacitor, power supply output circuit, fall
Power detection circuit and processor；
The input power is connected with the storage capacitor, and the storage capacitor connects the power supply output circuit, described
Input power is used to charge to the storage capacitor and the power supply output circuit power supply, the storage capacitor is used for described
To the power supply output circuit power supply after input power power down, the voltage that the power supply output circuit exports is separately input into described
The base stage of power amplifier and drain electrode；
The power-fail detection circuit connects the input power, and after the input power power down is detected, by power down
Information is sent to the processor, the base stage input voltage of power amplifier as described in the processor output control be less than or
After null signal to the power supply output circuit, then the drain electrode input voltage of power amplifier described in output control is zero
Signal is to the power supply output circuit.
Alternatively, the input power includes two-way, wherein output voltage all the way is more than the output voltage of another way；
The output end of two-way input power anti-reverse connects the storage capacitor with back flow circuit through respective respectively.
Alternatively, in addition to anti-surge circuit, the input of the anti-surge circuit connect described anti-reverse and pour in down a chimney electricity
The output end on road, and the output end of anti-surge circuit connects the storage capacitor.
Alternatively, battery is included all the way in the two-way input power, another way includes adapter, and the adapter is defeated
The voltage gone out is more than the voltage of battery output.
Alternatively, the power-fail detection circuit includes bleeder circuit and comparator, the output end connection of the input power
The input of the bleeder circuit, the output end of the bleeder circuit connect the input of the comparator, the comparator
Output end connects the input of the processor.
Alternatively, the output end of the comparator is also connected with filter circuit.
Alternatively, the filter circuit is RC filter circuits.
Alternatively, in addition to linear power supply, the input of the linear power supply connect the storage capacitor, the linear electricity
The output end in source connects the feeder ear of the comparator.
Alternatively, the storage capacitor is alminium electrolytic condenser.
Alternatively, the power supply output circuit is BUCK-BOOST circuits.
The technical scheme provided from above the utility model embodiment, input power of the present utility model is in normal work
Power amplifier is powered when making, and storage capacitor is charged, so that (normal powering down or exception are fallen for input power power down
Electricity) after, power amplifier can be powered by storage capacitor so that processor has the power down of time enough processing power amplifier
Sequential (the base stage input voltage for first controlling power amplifier is negative pressure or zero, and the drain electrode of power amplifier is lower electric again), to protect
Card power amplifier is not damaged.
It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not
The utility model can be limited.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, without having to pay creative labor, can also be attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of protection circuit shown in the utility model embodiment；
Fig. 2 is the structural representation of another protection circuit shown in the utility model embodiment；
Fig. 3 is the structural representation of another protection circuit shown in the utility model embodiment；
Fig. 4 is the structural representation that a kind of unmanned plane interference shown in the utility model embodiment is robbed.
Reference：
100：Power amplifier；200：Protection circuit；C：Storage capacitor；
1：Input power；11：Battery；12：Adapter；
2：Power supply output circuit；
3：Power-fail detection circuit；31：Bleeder circuit；32：Comparator；
4：Processor；
5：Anti-reverse and back flow circuit；
6：Anti-surge circuit.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the utility model.On the contrary, they be only with such as
The example of the consistent apparatus and method of some aspects being described in detail in appended claims, of the present utility model.
It is only merely for the purpose of description specific embodiment in the term that the utility model uses, and is not intended to be limiting this reality
With new." one kind ", " described " and "the" of singulative used in the utility model and appended claims
It is intended to include most forms, unless context clearly shows that other implications.It is also understood that term used herein " and/
Or " refer to and any or all may be combined comprising the associated list items purposes of one or more.
It will be appreciated that though various information may be described using term first, second, third, etc. in the utility model,
But these information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, not
In the case of departing from the scope of the utility model, the first information can also be referred to as the second information, and similarly, the second information can also
It is referred to as the first information.Depending on linguistic context, word as used in this " if " can be construed to " ... when " or
" when ... " or " in response to determining ".
Below in conjunction with the accompanying drawings, protection circuit 200 of the present utility model is described in detail.In the case where not conflicting,
Feature in following embodiments and embodiment can be mutually combined.
Shown in Fig. 1, a kind of structural representation for protection circuit 200 that the utility model embodiment proposes, the protection circuit
200 are used to protect power amplifier 100, for example, GaN power amplifier 100.
Referring to Fig. 1, the protection circuit 200 includes input power 1, storage capacitor C, power supply output circuit 2, power down inspection
Slowdown monitoring circuit 3 and processor 4.The input power 1 is connected with the storage capacitor C, the storage capacitor C connections power supply
Output circuit 2, the input power 1 is used to charge to the storage capacitor C and the power supply output circuit 2 is powered, described
Storage capacitor C is used to after the power down of input power 1 power to the power supply output circuit 2, and the power supply output circuit 2 is defeated
The voltage gone out is separately input into base stage and the drain electrode of the power amplifier 100.
The power-fail detection circuit 3 connects the input power 1, and after the power down of input power 1 is detected, will fall
Power information is sent to the processor 4, the base stage input voltage of power amplifier 100 as described in the output control of processor 4
After signal to the power supply output circuit less than or equal to zero, then the drain electrode of power amplifier 100 described in output control is defeated
Enter signal that voltage is zero to the power supply output circuit 2.
The input power 1 of the present embodiment is powered in normal work to power amplifier 100, and storage capacitor C is charged,
So that after the power down of input power 1 (normal powering down or powered-off fault), power amplifier 100 can be supplied by storage capacitor C
Electricity so that the power-off sequential that processor 4 has time enough processing power amplifier 100 (first controls power amplifier 100
Base stage input voltage is negative pressure or zero, the drain electrode of power amplifier 100 lower electricity again), with ensure power amplifier 100 not by
Damage.It should be noted that in the utility model, the power down of input power 1 may include normal powering down, such as user's normal shutdown, input
The power down of power supply 1 may also include powered-off fault.
It is connected in parallel again referring to Fig. 1, the input power 1 with the storage capacitor C, the both ends point of the storage capacitor C
Two inputs of the power supply output circuit 2 are not connected, and the voltage that the power supply output circuit 2 exports is separately input into the work(
The base stage of rate amplifier 100 and drain electrode.
The input of the power-fail detection circuit 3 connects the output end of the input power 1, the power-fail detection circuit 3
Output end connect the input of the processor 4, the output end connection power supply output circuit 2 of the processor 4 makes
Can end.
Wherein, after the power-fail detection circuit 3 detects the power down of input power 1, the voltage at the storage capacitor C both ends is defeated
Enter to the input of the power supply output circuit 2, the processor 4, which exports, causes the power supply output circuit 2 to input to described
After signal of the voltage of base stage less than or equal to zero to the Enable Pin of the power supply output circuit, then export so that the power supply
Output circuit 2 inputs the Enable Pin to the signal that the voltage of the drain electrode is zero to the power supply output circuit, so as to realize pair
The SECO of the power down of power amplifier 100, protects power amplifier 100 not to be damaged.
In one embodiment, the power amplifier 100 is GaN power amplifier 100.In 1 power down of input power,
The base stage input voltage of GaN power amplifier 100 is first maintained into -5V, then causes electricity under the drain electrode of GaN power amplifier 100,
It just can guarantee that GaN power amplifier 100 is not damaged.In the present embodiment, the power-fail detection circuit 3 detects that input power 1 falls
After electricity, the control source at the storage capacitor C both ends maintains GaN power amplifier to the input of the power supply output circuit 2
100 still normal works, meanwhile, power-fail detection circuit 3 sends the signal of the power down of input power 1 to the processor 4,
Processor 4 can then export so that it is -5V signal to the power supply that the power supply output circuit 2, which is inputted to the voltage of the base stage,
The Enable Pin of output circuit.Also, being exported in processor 4 causes the power supply output circuit 2 to input to the voltage of the base stage
After -5V signal to the Enable Pin of the power supply output circuit, the processor 4 can also export so that the power supply output
Circuit 2 inputs the Enable Pin to the signal that the voltage of the drain electrode is 0V to the power supply output circuit, so as to control GaN power
Power-off sequential of the amplifier 100 after the powered-off fault of input power 1 so that GaN power amplifier 100 is in the power down of input power 1
Afterwards, being capable of safety shutdown.
Alternatively, the storage capacitor C is alminium electrolytic condenser, and its capacity is big, and cost is low.
Alternatively, the processor 4 can be ARM (Advanced RISC Machines, risc microcontroller 4), AVR
Single-chip microcomputers such as (RISC reduced instruction set computers 8-bit High-Speed Microcontrollers), can also be ASIC (Application Specific
Integrated Circuit, application specific integrated circuit) chip.
Referring to Fig. 2, in the present embodiment, the input power 1 includes two-way, wherein output voltage all the way is more than another way
Output voltage；The output end of two-way input power 1 connects the storage capacitor through respective anti-reverse and back flow circuit 5 respectively
C.The anti-reverse and back flow circuit 5 be used to select in two-way input power 1 all the way to follow-up storage capacitor C chargings and right
Power supply output circuit 2 is powered, and in the present embodiment, described anti-reverse and back flow circuit 5 selects output voltage in two-way input power 1
Larger charges to follow-up storage capacitor C and power supply output circuit 2 is powered all the way.Meanwhile anti-reverse and back flow circuit 5 can also
Enough prevent the inside and outside differential pressure of input power 1 from causing electric current to pour in down a chimney and damaging power supply, in addition, when input power 1 is abnormal short-circuit, counnter attack
The path of input power 1 and system can be blocked with back flow circuit 5 by connecing, protection storage capacitor C energy so that processor 4 has
The power-off sequential of time enough processing power amplifier 100.Also, dual power supply also make it that the stability of system is stronger.
Alternatively, battery 11 is included all the way in two-way input power 1, another way includes adapter 12, the adapter
The voltage of 12 outputs is more than the voltage of the battery 11 output.When 12 equal normal work of battery 11 and adapter, by adapter
12 pairs of storage capacitor C chargings are simultaneously powered to power supply output circuit 2；After power-off all the way in two-way input power 1, then by another
Storage capacitor C is charged and power supply output circuit 2 is powered in road (input power 1 all the way not powered off).Certainly, also can be by institute
The output voltage setting of battery 11 is stated into the output voltage more than the adapter 12 so that battery 11 and adapter 12 are normal
During work, storage capacitor C is charged by battery 11 and power supply output circuit 2 is powered.
Alternatively, the battery 11 is battery 11, is easy to recycle, and saves resource.Alternatively, the adapter 12
It is electrically mated with city, so as to output voltage.
Again referring to Fig. 2, delay startup is provided for the charging to storage capacitor C, prevents the voltage that input power 1 exports in short-term
It is interior to cause occur spark when user is hot-swappable beyond normal voltage, cause whole protection circuit 200 to damage, the protection electricity
Road 200 also includes anti-surge circuit 6, and the input of the anti-surge circuit 6 connects the described anti-reverse and output of back flow circuit 5
End, and the output end of anti-surge circuit 6 connects the storage capacitor C.
In addition, the input power 1 may also comprise three tunnels and more than, per road input power 1 through respective anti-reverse and
Back flow circuit 5 connects the input of anti-surge circuit 6, then connects the storage capacitor C by the output end of anti-surge circuit 6.
In the present embodiment, power-fail detection circuit 3 all the way are all connected with per the output end of road input power 1, to know in time
Per the power-down conditions of road input power 1.Wherein, the test point of power-fail detection circuit 3 is to try to connect close to the input of input power 1
Mouthful, to enable power-fail detection circuit 3 in most fast time detecting to power down, and notifier processes device 4 in time.
Referring to Fig. 3, the power-fail detection circuit 3 includes bleeder circuit 31 and comparator 32, the output of the input power 1
End connects the input of the bleeder circuit 31, and the output end of the bleeder circuit 31 connects the input of the comparator 32,
The output end of the comparator 32 connects the input of the processor 4.
Wherein, bleeder circuit 31 may be selected to be the conventional bleeder circuit 31 in this area.In addition, those skilled in the art can root
The resistance of divider resistance is chosen according to common technical knowledge so that in 1 power down of input power, bleeder circuit 31 is inputted to comparator 32
Voltage enables comparator 32 to export power down information to processor 4, so as to identify the power down of input power 1.
Alternatively, the comparator 32 exports low and high level signal to processor 4, i.e. comparator with positive feedback connected mode
32 transmissions to the power down information of processor 4 can be high level or low level.In some instances, when power-fail detection circuit 3 detects
To during 1 power down of input power, the comparator 32 exports low level signal to processor 4, i.e. processor 4 and receives comparator 32
The power down information of input is that low level represents the power down of input power 1.Certainly, in some other example, power-fail detection circuit is worked as
3 when detecting 1 power down of input power, and the comparator 32 exports high level signal to processor 4, i.e. processor 4 and receives ratio
Compared with the power down information that device 32 inputs the power down of input power 1 is represented for high level.
Two-way is included with input power 1, and when power-fail detection circuit 3 detects 1 power down of input power, the comparator
The operation of processor 4 is further illustrated exemplified by 32 output low level signal to processors 4.
When the signal that processor 4 receives two outputs of comparators 32 is low level, output make it that the power supply is defeated
Go out circuit 2 and input signal of the voltage less than or equal to zero to the base stage to the Enable Pin of the power supply output circuit, then
Output causes the power supply output circuit 2 inputs to make to the signal that the voltage of the drain electrode is zero to the power supply output circuit
Can end, to complete lower electric treatment to power amplifier 100 so that under the drain electrode of the power amplifier 100 electricity be
Its base stage input voltage for it is negative or zero in the case of carry out, so as to be protected to power amplifier 100.
In the present embodiment, the power supply output circuit 2 is BUCK-BOOST (i.e. Buck-boost converter) circuit.Pass through
BUCK-BOOST topology conversions, after signal of the voltage less than or equal to zero of the control base stage of the transmission of processor 4 is received,
To input to the voltage conversion of the base stage of power amplifier 100 is negative pressure or zero, and in the control for receiving the transmission of processor 4
After the signal that drain voltage is zero, the voltage conversion by the drain electrode of input to power amplifier 100 is zero, to smoothly complete power
The power down of amplifier 100, prevent that power amplifier 100 is impaired.
In addition, to avoid because the shake of the junction of bleeder circuit 31 and input power 1 causes comparator 32 to processor
4 wrong report, the output end of the comparator 32 are also connected with filter circuit.Alternatively, the filter circuit is RC filter circuits.Can
Selection of land, the filtering time of the filter circuit is 10us (units：Microsecond).Certainly, the filter circuit can also be ground connection
Electric capacity, the output end of the comparator 32 is by capacity earth, wrong report caused by so as to prevent shake.
The comparator 32 of the present embodiment needs to carry out return difference design, prevents the output voltage of input power 1 in return difference scope
During interior change, system is caused to be shaken.Alternatively, the return difference of the comparator 32 is 2V.For example, when the output electricity of input power 1
During pressure >=12V, system can normal work, comparator 32 export low level to processor 4 represent the power down of input power 1, partial pressure
The 1/2 of the voltage that the voltage that circuit 31 exports exports for input power 1, the voltage that bleeder circuit 31 exports are loaded directly into comparing
The normal phase input end of device 32, the negative-phase input connection reference voltage of the comparator 32.If do not do return difference to comparator 32 to set
Meter, the reference voltage is 6V.After 2V return difference design is done to comparator 32, output voltage >=(12+ of input power 1
2) during V, the system of representative can normal work, the reference voltage is 7V.
In the present embodiment, the protection circuit 200 also includes linear power supply (not shown).The linear power supply it is defeated
Enter end and connect the storage capacitor C, the output end of the linear power supply connects the feeder ear of the comparator 32, the energy storage
Electric capacity C is additionally operable to after the power down of input power 1, and the linear power supply is powered, to cause the power supply of comparator 32
The retention time of power supply is not less than the lower electric deadline of power amplifier 100.In addition, during 1 normal work of input power,
The linear power supply is powered by the input power 1.Alternatively, the linear power supply includes TL431, the TL431
Input connect the storage capacitor C, the output end of the TL431 connects the feeder ear of the comparator 32.
It should be noted that above-mentioned protection circuit 200, which can be applied to unmanned plane interference unit, base station, radar etc., possesses power
In the equipment of amplifier 100.
The present embodiment is further illustrated so that protection circuit 200 is applied in unmanned plane interference unit as an example.It is described
Referring to Fig. 4, the unmanned plane interference unit is that unmanned plane interference is robbed, and it includes power amplifier 100 and protection circuit
200, the protection circuit 200 is used to protect the power amplifier 100.
The unmanned plane interference is robbed for launching interference signal, to disturb the normal work of unmanned plane, forces unmanned plane to return
Boat or landing, so as to be protected to security protection sensitizing range.
The application scenarios that unmanned plane interference is robbed are varied, for example, large-scale activity, political meeting, security work etc., these
Occasion is required to very high reliability.However, unmanned plane interference is robbed it is difficult to ensure that being not in the situation of unexpected power down.In addition,
The price that unmanned plane interference is robbed is higher, and maintenance cost is higher, and the MTBF of system (mean time between failures, is put down
Equal between-failures) require high.The utility model embodiment is by being provided for protecting the protection circuit of the power amplifier 100
200, so as to improve the reliability of system, reduce the crash rate of product.
It should be noted that although the unmanned vehicle of the present embodiment can be described as multi-rotor unmanned aerial vehicle, but so
Description be not limitation, it will be understood by a person skilled in the art that any kind of unmanned plane is all suitable for.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements done etc., the utility model should be included in
Within the scope of protection.
Claims (10)
1. a kind of protection circuit, for protecting power amplifier, it is characterised in that defeated including input power, storage capacitor, power supply
Go out circuit, power-fail detection circuit and processor；
The input power is connected with the storage capacitor, and the storage capacitor connects the power supply output circuit, the input
Power supply is used to charge to the storage capacitor and the power supply output circuit power supply, the storage capacitor is used in the input
The power is separately input into the power supply output circuit power supply, the voltage of the power supply output circuit output after power supply power-fail
The base stage of amplifier and drain electrode；
The power-fail detection circuit connects the input power, and after the input power power down is detected, by power down information
Send to the processor, the base stage input voltage of power amplifier is less than or equal to as described in the processor output control
Zero signal to it is described power supply output circuit after, then power amplifier described in output control drain electrode input voltage be zero signal
To the power supply output circuit.
2. protection circuit as claimed in claim 1, it is characterised in that the input power includes two-way, wherein all the way defeated
Go out the output voltage that voltage is more than another way；
The output end of two-way input power anti-reverse connects the storage capacitor with back flow circuit through respective respectively.
3. protection circuit as claimed in claim 2, it is characterised in that also including anti-surge circuit, the anti-surge circuit
Input connects the described anti-reverse and output end of back flow circuit, and the output end of anti-surge circuit connects the storage capacitor.
4. protection circuit as claimed in claim 2, it is characterised in that include battery all the way in the two-way input power,
Another way includes adapter, and the voltage of the adapter output is more than the voltage of battery output.
5. protection circuit as claimed in claim 1, it is characterised in that the power-fail detection circuit includes bleeder circuit and compared
Device, the output end of the input power connect the input of the bleeder circuit, described in the output end connection of the bleeder circuit
The input of comparator, the output end of the comparator connect the input of the processor.
6. protection circuit as claimed in claim 5, it is characterised in that the output end of the comparator is also connected with filter circuit.
7. protection circuit as claimed in claim 6, it is characterised in that the filter circuit is RC filter circuits.
8. protection circuit as claimed in claim 5, it is characterised in that also including linear power supply, the input of the linear power supply
End connects the storage capacitor, and the output end of the linear power supply connects the feeder ear of the comparator.
9. protection circuit as claimed in claim 1, it is characterised in that the storage capacitor is alminium electrolytic condenser.
10. protection circuit as claimed in claim 1, it is characterised in that the power supply output circuit is BUCK-BOOST circuits.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720362724.XU CN207117578U (en) | 2017-04-07 | 2017-04-07 | Protection circuit |
| CN201780060678.0A CN109792392B (en) | 2017-04-07 | 2017-06-14 | Protective circuit |
| PCT/CN2017/088337 WO2018184292A1 (en) | 2017-04-07 | 2017-06-14 | Protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720362724.XU CN207117578U (en) | 2017-04-07 | 2017-04-07 | Protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207117578U true CN207117578U (en) | 2018-03-16 |
Family
ID=61595845
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720362724.XU Expired - Fee Related CN207117578U (en) | 2017-04-07 | 2017-04-07 | Protection circuit |
| CN201780060678.0A Expired - Fee Related CN109792392B (en) | 2017-04-07 | 2017-06-14 | Protective circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780060678.0A Expired - Fee Related CN109792392B (en) | 2017-04-07 | 2017-06-14 | Protective circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN207117578U (en) |
| WO (1) | WO2018184292A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109615833A (en) * | 2019-01-15 | 2019-04-12 | 安徽皖兴通信息技术有限公司 | A kind of method of dual power supply device looses power alarm |
| CN109792392A (en) * | 2017-04-07 | 2019-05-21 | 深圳市大疆创新科技有限公司 | Protect circuit |
| WO2020239095A1 (en) * | 2019-05-31 | 2020-12-03 | 深圳市道通智能航空技术有限公司 | Power supply protection circuit and power supply |
| CN112639497A (en) * | 2019-11-29 | 2021-04-09 | 深圳市大疆创新科技有限公司 | Battery detection circuit, battery detection method, battery, electronic device and storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113741252A (en) * | 2021-08-19 | 2021-12-03 | 武汉光迅科技股份有限公司 | Power-off time sequence control circuit of multi-power-supply system |
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| WO2006013557A2 (en) * | 2004-08-02 | 2006-02-09 | Green Power Technologies Ltd. | Method and control circuitry for improved-performance switch-mode converters |
| CN201336019Y (en) * | 2009-01-22 | 2009-10-28 | 无锡市中远工业自动化有限公司 | Power-failure protecting circuit for programmable controller |
| CN102684240B (en) * | 2011-03-17 | 2015-01-28 | 上海中兴派能能源科技有限公司 | Management system applied to lithium ion battery and lithium ion battery pack |
| CN102412815A (en) * | 2011-06-28 | 2012-04-11 | 中兴通讯股份有限公司 | Method and system for controlling power on/off of power amplifier |
| CN102684615B (en) * | 2012-04-23 | 2015-04-08 | 烽火通信科技股份有限公司 | Driving device achieving ideal power up and power down timing sequence of power amplifier |
| US9716477B2 (en) * | 2012-12-28 | 2017-07-25 | Peregrine Semiconductor Corporation | Bias control for stacked transistor configuration |
| CN103280968B (en) * | 2013-05-09 | 2015-10-28 | 中国电子科技集团公司第二十四研究所 | The sequential control circuit of the pulse power |
| CN103368750B (en) * | 2013-06-24 | 2016-08-10 | 华为技术有限公司 | A kind of power supply sequence circuit and method of supplying power to |
| CN203572867U (en) * | 2013-11-25 | 2014-04-30 | 深圳市金威源科技股份有限公司 | Input power supply power down detection circuit |
| CN105048969B (en) * | 2015-07-15 | 2018-01-09 | 京信通信系统（中国）有限公司 | GaN HEMT biasing circuits |
| CN207117578U (en) * | 2017-04-07 | 2018-03-16 | 深圳市大疆创新科技有限公司 | Protection circuit |
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2017
- 2017-04-07 CN CN201720362724.XU patent/CN207117578U/en not_active Expired - Fee Related
- 2017-06-14 WO PCT/CN2017/088337 patent/WO2018184292A1/en active Application Filing
- 2017-06-14 CN CN201780060678.0A patent/CN109792392B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109792392A (en) * | 2017-04-07 | 2019-05-21 | 深圳市大疆创新科技有限公司 | Protect circuit |
| CN109615833A (en) * | 2019-01-15 | 2019-04-12 | 安徽皖兴通信息技术有限公司 | A kind of method of dual power supply device looses power alarm |
| WO2020239095A1 (en) * | 2019-05-31 | 2020-12-03 | 深圳市道通智能航空技术有限公司 | Power supply protection circuit and power supply |
| CN112639497A (en) * | 2019-11-29 | 2021-04-09 | 深圳市大疆创新科技有限公司 | Battery detection circuit, battery detection method, battery, electronic device and storage medium |
| WO2021102901A1 (en) * | 2019-11-29 | 2021-06-03 | 深圳市大疆创新科技有限公司 | Battery detection circuit and method, battery, electronic device, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109792392B (en) | 2021-07-09 |
| CN109792392A (en) | 2019-05-21 |
| WO2018184292A1 (en) | 2018-10-11 |
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