CN207994604U - Less voltage protector - Google Patents
Less voltage protector Download PDFInfo
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- CN207994604U CN207994604U CN201820161929.6U CN201820161929U CN207994604U CN 207994604 U CN207994604 U CN 207994604U CN 201820161929 U CN201820161929 U CN 201820161929U CN 207994604 U CN207994604 U CN 207994604U
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Abstract
The utility model is related to a kind of less voltage protectors, including hysteresis circuitry and control source detection module；Control source detection module includes bleeder circuit, benchmark voltage-stablizer and switching circuit；The input terminal of bleeder circuit, the first end of switching circuit connect external input power；The output end of the reference edge connection bleeder circuit of benchmark voltage-stablizer, the output end of hysteresis circuitry, the second end of positive connecting valve circuit, cathode ground connection；The input terminal of the third end connection hysteresis circuitry of switching circuit.The undervoltage protection device of the utility model is simple in structure; by accessing hysteresis circuitry; it effectively prevent the voltage when external input power by external disturbance; when under-voltage protection value fluctuates back and forth; frequently shutdown or unlatching under-voltage protecting circuit; the anti-interference ability for further increasing electrical equipment provides stable power utilization environment for electrical equipment.
Description
Technical field
The utility model is related to low-voltage protection technical fields, more particularly to less voltage protector.
Background technology
Currently, the externally fed power input in electronic and electrical equipment would generally be provided with under-voltage protecting circuit, prevent
When input voltage is too low electronic and electrical equipment caused by be lost.
During realization, inventor has found that at least there are the following problems in traditional technology：
When the power input voltage of electronic and electrical equipment generates unstable variation, especially set in under-voltage protecting circuit
When fixed under-voltage protection voltage value is shaken back and forth, under-voltage protecting circuit can be caused frequently to turn off or open, lead to output voltage
Also fluctuation can accordingly be generated.Meanwhile the accuracy of detection of the under-voltage protecting circuit in traditional technology is relatively low, stability is poor, is not suitable for
In numerous electronic and electrical equipments.It is unfavorable for the long-time service of electronic and electrical equipment as a result, and it is caused a degree of
Damage.
Utility model content
Based on this, it is necessary to for the problem of the stability difference of under-voltage protecting circuit in traditional technology, provide a kind of deficient electricity
Press protective device.
To achieve the goals above, on the one hand, an embodiment of the present invention provides a kind of less voltage protectors；
A kind of less voltage protector, including hysteresis circuitry and control source detection module；Control source detection module
Including bleeder circuit, benchmark voltage-stablizer and switching circuit；
The input terminal of bleeder circuit, the first end of switching circuit connect external input power；The reference edge of benchmark voltage-stablizer
Connect the output end of bleeder circuit, the output end of hysteresis circuitry, the second end of positive connecting valve circuit, cathode ground connection；Switch
The input terminal of the third end connection hysteresis circuitry of circuit；
Hysteresis circuitry is based on bleeder circuit and exports hysteresis voltage to benchmark voltage-stablizer；External input power is based on bleeder circuit
Branch pressure voltage is exported to benchmark voltage-stablizer；Benchmark voltage-stablizer is based on hysteresis voltage and branch pressure voltage, in the electricity of external input power
It forces down when preset under-voltage protection value, disconnects switching circuit.
Hysteresis circuitry includes the first diode and first resistor in one of the embodiments,；
The third end of the positive connecting valve circuit of first diode, cathode connect one end of first resistor；First resistor
The other end connect the reference edge of the benchmark voltage-stablizer.
In one of the embodiments, benchmark voltage-stablizer include operational amplifier, the second diode, third diode and
First triode；
The positive in-phase end for connecting operational amplifier of the output end of bleeder circuit, the second diode；Operational amplifier
Output end connects the base stage of the first triode, reverse side ground connection；The second end of switching circuit, the cathode of the second diode, third
The cathode of diode connects the collector of the first triode；The emitter of first triode, the plus earth of third diode.
Benchmark voltage-stablizer is TL431 base linearity voltage-stablizers in one of the embodiments,.
Switching circuit includes second resistance, 3rd resistor, the 4th resistance and the two or three pole in one of the embodiments,
Pipe；
The anode of one end connection benchmark voltage-stablizer of second resistance；The other end of second resistance, one end of 3rd resistor connect
Connect the base stage of the second triode；The other end of 3rd resistor connects the emitter of the second triode；The emitter of second triode
External input power is connected, collector connects one end of the 4th resistance；The input of the other end connection hysteresis circuitry of 4th resistance
End.
Bleeder circuit includes the 5th resistance and the 6th resistance in one of the embodiments,；
One end of 5th resistance, one end of the 6th resistance connect the reference edge of benchmark voltage-stablizer；The other end of 5th resistance
Connect external input power；The other end of 6th resistance is grounded.
Further include voltage output module in one of the embodiments,；
The output end of the input terminal of voltage output module, the input terminal connection control source detection module of hysteresis circuitry；Electricity
The output end of output module is pressed to connect driving circuit.
Voltage output module includes third transistor and the 4th triode in one of the embodiments,；
The third end of switching circuit, the input terminal of hysteresis circuitry connect the base stage of third transistor；The collection of third transistor
Electrode connects external power supply, emitter ground connection；The collector of the base stage connection third transistor of 4th triode, collector connection
Driving circuit, transmitting collection ground connection.
Driving circuit is backlight drive circuit in one of the embodiments,.
External input power is the externally fed power supply of TV in one of the embodiments,.
The invention has the advantages that and advantageous effect：
The less voltage protector of the utility model is based on bleeder circuit using hysteresis circuitry and is exported late to benchmark voltage-stablizer
Stagnant voltage, external input power are based on bleeder circuit and export branch pressure voltage to benchmark voltage-stablizer, and benchmark voltage-stablizer is based on sluggish electricity
Pressure and branch pressure voltage disconnect switching circuit when the voltage of external input power is less than preset under-voltage protection value.This practicality is new
The less voltage protector of type is simple in structure, by accessing hysteresis circuitry, effectively prevent voltage when external input power by
External disturbance, when under-voltage protection value fluctuates back and forth, frequently shutdown or unlatching under-voltage protecting circuit, further increase electric appliance and set
Standby anti-interference ability provides stable power utilization environment for electrical equipment.
Description of the drawings
By being more particularly described for the preferred embodiment of the present invention shown in attached drawing, above and other mesh of the invention
, feature and advantage will become more fully apparent.Identical reference numeral indicates identical part in whole attached drawings, and does not carve
Meaning draws attached drawing by actual size equal proportion scaling, it is preferred that emphasis is shows the purport of the present invention.
Fig. 1 is the attachment structure schematic diagram of the utility model less voltage protector embodiment 1；
Fig. 2 is the specific attachment structure schematic diagram of the utility model less voltage protector；
Fig. 3 is another specific attachment structure schematic diagram of the utility model less voltage protector.
Specific implementation mode
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can in many different forms come in fact
It is existing, however it is not limited to embodiment described herein.Make public affairs to the utility model on the contrary, purpose of providing these embodiments is
It is more thorough and comprehensive to open content.
It should be noted that when an element is considered as " connection " another element, it can be directly to separately
One element and it is in combination be integrated, or may be simultaneously present centering elements.Term as used herein " installation ", " one
End ", " other end " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more relevant Listed Items.
It is the attachment structure schematic diagram of the utility model less voltage protector embodiment 1 referring to Fig. 1, Fig. 1, as schemed institute
Show.
The low-voltage protection circuit of the utility model, including hysteresis circuitry 12 and control source detection module 10；Voltage
It includes bleeder circuit 110, benchmark voltage-stablizer 120 and switching circuit 130 to input detection module 10；
The input terminal of bleeder circuit 110, the first end of switching circuit 130 connect external input power；Benchmark voltage-stablizer 120
The reference edge connection output end of bleeder circuit 110, hysteresis circuitry 12 output end, the second of positive connecting valve circuit 130
End, cathode ground connection；The input terminal of the third end connection hysteresis circuitry 12 of switching circuit 130；
Hysteresis circuitry 12 is based on bleeder circuit 110 and exports hysteresis voltage to benchmark voltage-stablizer 120；13 base of external input power
In bleeder circuit 110 branch pressure voltage is exported to benchmark voltage-stablizer 120；Benchmark voltage-stablizer 120 is based on hysteresis voltage and branch pressure voltage,
When the voltage of external input power 13 is less than preset under-voltage protection value, switching circuit 130 is disconnected.
When the voltage of external input power is divided by bleeder circuit 110, the voltage output after partial pressure is steady to benchmark
Depressor 120, when the voltage of output to benchmark voltage-stablizer 120 reaches the reference voltage of its inside, the conducting of benchmark voltage-stablizer is that is, outer
Portion's input supply voltage has reached certain voltage value.At this point, the switching circuit 130 of connection benchmark voltage-stablizer 120 is opened so that late
Stagnant circuit 12 is connected to export bias voltage, which is influenced to obtain based on the bleeder circuit 110 by bleeder circuit 110
Hysteresis voltage, the as voltage of external input power provide hysteresis voltage, and export to benchmark voltage-stablizer.
In a specific embodiment, when the voltage of external input power reaches certain voltage value, such as 24V, but
It is not limited to 24V, is exported at this time to the voltage of 120 reference edge of benchmark voltage-stablizer and reaches its internal reference voltage turn-on, and made out
It opens on powered-down road 130.Hysteresis circuitry conducting output bias voltage after switching circuit 130 is opened, the bias voltage is by bleeder circuit
110 influence to form hysteresis voltage, export to benchmark voltage-stablizer 120, and are introduced to external input power sluggish.When external input electricity
The voltage in source output branch pressure voltage to benchmark voltage-stablizer 120, benchmark voltage-stablizer after the partial pressure of bleeder circuit 110 is received based on slow
The input voltage of stagnant voltage and branch pressure voltage.When the voltage of external input power is more than preset under-voltage protection value, benchmark
The input voltage of 120 reference edge of voltage-stablizer reaches its internal reference voltage, and switching circuit 130 can be maintained in open state；When outer
When the voltage of portion's input power is less than preset under-voltage protection value, the input voltage of the reference edge of benchmark voltage-stablizer 120 is less than it
Internal reference voltage, the at this time shutdown of benchmark voltage-stablizer 120, Simultaneous Switching circuit 130 disconnect.Wherein, preset under-voltage protection value
For the under-voltage protection value based on hysteresis voltage.
The less voltage protector of the utility model provides hysteresis voltage, externally using hysteresis circuitry and bleeder circuit
Portion's input power introduces sluggishness, when the voltage of external input power fluctuates near under-voltage protection value, plays voltage compensation
Effect, when preventing external input power from being caused shake by ectocine, under-voltage protecting circuit frequently switches on.Further, lead to
It crosses benchmark voltage-stablizer and receives the input voltage based on hysteresis voltage, reach the effect of the detection to external input supply voltage, ensure
The voltage of external input power triggers under-voltage protection when being less than the under-voltage protection value based on hysteresis voltage, otherwise keeps under-voltage protection
Circuit is connected.The utility model improves the stability and anti-interference ability of under-voltage protecting circuit, and then it is steady to provide electrical equipment
Fixed running environment.
Referring to Fig. 2, Fig. 2 is the specific attachment structure schematic diagram of the utility model less voltage protector, as shown in the figure.
In a specific embodiment, hysteresis circuitry includes the first diode and first resistor.First diode
The third end of positive connecting valve circuit, cathode connect one end of first resistor, and the other end of first resistor connects benchmark voltage stabilizing
The reference edge of device.
After switching circuit is opened, the first diode DB901 and first resistor RB888 export bias voltage to benchmark voltage stabilizing
The reference edge R of device UB102, and hysteresis voltage is formed based on bleeder circuit, it is an externally input power supply and introduces sluggishness, while to outside
The voltage of input power plays compensating action.Wherein, the big of hysteresis voltage can be adjusted by adjusting the resistance value of first resistor RB888
It is small.
Referring to Fig. 3, Fig. 3 is another specific attachment structure schematic diagram of the utility model less voltage protector, as schemed institute
Show.
In a specific embodiment, benchmark voltage-stablizer include operational amplifier, the second diode, third diode with
And first triode.
The positive in-phase end for connecting the big device in operation side of the output end of bleeder circuit, the second diode；Operational amplifier
Output end connects the base stage of the first triode, reverse side ground connection；The second end of switching circuit, the cathode of the second diode, third
The cathode of diode connects the collector of the first triode；The emitter of first triode, the plus earth of third diode.
Specifically, when the in-phase end R of operational amplifier reaches 2.5V, operational amplifier exports high level, causes first
Triode ON, collector K have electric current to pass through to emitter A, and switching circuit is opened, and hysteresis circuitry conducting simultaneously will be based on partial pressure electricity
The hysteresis voltage on road is exported to the in-phase end of operational amplifier, while being an externally input power supply and being provided sluggishness, and voltage compensation is played
Effect, further maintain electrical equipment normal work.When the voltage of external input power is less than based on the under-voltage of hysteresis voltage
When protection value, the in-phase end input voltage of operational amplifier is caused to be less than reference voltage, voltage output end exports low level at this time,
First triode ends, and causes switching circuit to disconnect, the electrical equipment being attached thereto is caused to be stopped.
The less voltage protector of the utility model, by the benchmark voltage stabilizing for including operational amplifier and the first triode
Device, and then reach the effect of the detection to external input supply voltage, it is simple in structure.Further improve the utility model under-voltage
The stability of protective device.
In a specific embodiment, benchmark voltage-stablizer is TL431 base linearity voltage-stablizers.The base linearity voltage-stablizer
With good thermal stability, the working performance of the utility model can be improved, contribute in external input power in under-voltage protection
When value disturbance nearby, benchmark voltage-stablizer can export stable level signal when receiving the input voltage based on hysteresis voltage,
Avoid false triggering under-voltage protection.
As shown in Fig. 2, in a specific embodiment, switching circuit includes second resistance, 3rd resistor, the 4th resistance
And second triode.
The anode of one end connection benchmark voltage-stablizer of second resistance；The other end of second resistance, one end of 3rd resistor connect
Connect the base stage of the second triode；The other end of 3rd resistor connects the emitter of the second triode；The emitter of second triode
External input power is connected, collector connects one end of the 4th resistance；The input of the other end connection hysteresis circuitry of 4th resistance
End.
The emitter of second triode QB102 connects external input power, defeated in the reference edge R of benchmark voltage-stablizer UB102
When entering voltage and reaching reference voltage, the positive ends K of benchmark voltage-stablizer start sink current to the ends cathode A and are connected, and pass through the at this time
Two resistance RB885 make the second triode QB102 be in saturation conduction state, and the second triode QB102 is opened.In benchmark voltage-stablizer
The reference edge R input voltages of UB102 can not be opened when being less than reference voltage, lead to the second triode QB102 shutdowns.Further
Ground, the 3rd resistor RB886 being connected in parallel between the second triode QB102 emitters and base stage play the role of pull-up resistor, really
Protecting the second triode QB102 when benchmark voltage-stablizer UB102 is not exported can reliably end；Have in benchmark voltage-stablizer UB102 defeated
It is effectively connected when going out.
In a specific embodiment, bleeder circuit includes the 5th resistance and the 6th resistance.One end of 5th resistance,
The other end of the reference edge of one end connection benchmark voltage-stablizer of 6th resistance, the 5th resistance connects external input power, the 6th electricity
The other end of resistance is grounded.
On the basis of hysteresis circuitry after the reference edge R output bias voltage △ V of voltage-stablizer, is influenced, obtained by bleeder circuit
To the hysteresis voltage based on the 5th resistance RB850 and the 6th resistance RB880, i.e. hysteresis voltage is △ V × (RB850+RB880)
, it is an externally input power supply and sluggishness is provided, play the role of the voltage compensation to external input power.Further, external defeated
Enter power supply output branch pressure voltage after the 5th resistance RB850 of bleeder circuit and the 6th resistance RB880 partial pressures to export to benchmark
Voltage-stablizer UB102 so that benchmark voltage-stablizer UB102 is reaching it in the input voltage based on hysteresis voltage and branch pressure voltage
It is connected when internal reference voltage.
In a specific embodiment, drop to preset low-voltage protection value in the voltage of external input power, i.e.,
Drop to | VON- △ V × (RB850+RB880) | when, the input voltage of benchmark voltage-stablizer UB102 reference edges R is less than reference voltage
Into off state, causes the second triode QB102 to be not turned in cut-off state, trigger under-voltage protection at this time.Wherein, VONTable
Show the voltage of external input power.The utility model introduces hysteresis voltage, benchmark when effectively external input power being avoided to have disturbance
Voltage-stablizer UB102 repeated switch-ons and disconnection so that the second triode QB102 is frequently switched on, and false triggering under-voltage protection causes
The repeated multiple times open and close of electrical equipment damages electrical equipment.
In a specific embodiment, further include voltage output module.The input terminal of voltage output module, hysteresis circuitry
Input terminal connection control source detection module output end；The output end of voltage output module connects driving circuit.
Specifically, detecting that the voltage of external input power is less than preset under-voltage protection in control source detection module
When value, output shutdown electric signal to voltage output module, control voltage output module cuts off the driving circuit being attached thereto, so that
Electrical equipment is closed.
In a specific embodiment, voltage output module includes third transistor and the 4th triode.Switch electricity
The third end on road, the input terminal of hysteresis circuitry connect the base stage of third transistor；The collector of third transistor connects external electrical
Source, emitter ground connection；The collector of the base stage connection third transistor of 4th triode, collector connect driving circuit, transmitting
Collection ground connection.
Specifically, in the voltage V of external input powerONWhen reaching the first fixed voltage value, such as 24V, but do not limit to
Reach reference voltage in the reference edge R of the value, benchmark voltage-stablizer UB102, sink current and is led from the positive ends K to the ends cathode A
Logical, switching circuit is opened, and then third transistor QB805 conductings, is caused the voltage of the 4th triode QB806 base stages to be pulled low and is turned
For low level so that the output end BL_ON voltages of voltage output module maintain high level state, keep the driving being attached thereto electric
Road works normally.Further, after switching circuit unlatching, voltage-stablizer UB102 introduces bias voltage, phase on the basis of hysteresis circuitry
When certain sluggish in providing so that input has the hysteresis voltage based on bleeder circuit, is opened when external input power being avoided to have disturbance
Powered-down road frequently turns off.When the voltage of external input power drops to the under-voltage protection value based on hysteresis voltage, benchmark voltage stabilizing
The input voltage of the reference edge R of device is less than reference voltage, and benchmark voltage-stablizer UB102 can not be opened, and switching circuit is caused to turn off, because
Such as 12V bias voltages conducting that this 4th triode QB806 is provided due to external power supply, but 12V bias voltages are not limited to,
The output voltage of the output end BL_ON of voltage output module is pulled low, and then turns off driving circuit, and driving circuit is made to stop work
Make, and then electrical equipment is closed.
In a specific embodiment, driving circuit is backlight drive circuit.The utility model effectively prevent external defeated
Enter false triggering under-voltage protection when power supply is disturbed, improve the anti-interference ability of backlight drive circuit so that backlight display works
In stable state.
In a specific embodiment, external input power is the externally fed power supply of TV.Externally fed power supply is
Alternating current converts the power supply to work to each internal circuit after being input to the Switching Power Supply of TV.
When external input power is the backlight drive power supply of 24V, it is assumed that introduce the sluggishness electricity of 2V by hysteresis circuitry
Pressure, external input power is disturbed by 0.1V at this time, then the voltage of external input power only has 23.9V, but the voltage value is still
So the triggering of under-voltage protection is avoided by the compensating action of hysteresis voltage higher than 22V.
The utility model less voltage protector is based on bleeder circuit using hysteresis circuitry and exports sluggishness to benchmark voltage-stablizer
Voltage, external input power are based on bleeder circuit and export branch pressure voltage to benchmark voltage-stablizer, and benchmark voltage-stablizer is based on hysteresis voltage
And branch pressure voltage disconnects switching circuit when the voltage of external input power is less than preset under-voltage protection value.The utility model
Undervoltage protection device it is simple in structure, by accessing hysteresis circuitry, effectively prevent the voltage when external input power by the external world
Disturbance, when under-voltage protection value fluctuates back and forth, frequently shutdown or unlatching under-voltage protecting circuit, further increase electrical equipment
Anti-interference ability provides stable power utilization environment for electrical equipment.
Above example only expresses the several embodiments of the utility model, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to utility model patent range therefore be interpreted as.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this reality
With novel protection domain.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of less voltage protector, which is characterized in that including hysteresis circuitry and control source detection module；The voltage
It includes bleeder circuit, benchmark voltage-stablizer and switching circuit to input detection module；
The first end connection external input power of the input terminal of the bleeder circuit, the switching circuit；The benchmark voltage-stablizer
Reference edge connect the output end of the bleeder circuit, the hysteresis circuitry output end, anode connects the switching circuit
Second end, cathode ground connection；The third end of the switching circuit connects the input terminal of the hysteresis circuitry；
The hysteresis circuitry is based on the bleeder circuit and exports hysteresis voltage to the benchmark voltage-stablizer；The external input power
Based on the bleeder circuit branch pressure voltage is exported to the benchmark voltage-stablizer；The benchmark voltage-stablizer be based on the hysteresis voltage and
The branch pressure voltage disconnects the switching circuit when the voltage of the external input power is less than preset under-voltage protection value.
2. less voltage protector according to claim 1, which is characterized in that the hysteresis circuitry includes the first diode
And first resistor；
The anode of first diode connects the third end of the switching circuit, and cathode connects one end of the first resistor；
The other end of the first resistor connects the reference edge of the benchmark voltage-stablizer.
3. less voltage protector according to claim 1, which is characterized in that the benchmark voltage-stablizer includes operation amplifier
Device, the second diode, third diode and the first triode；
The output end of the bleeder circuit, the second diode anode connect the in-phase end of the operational amplifier；The operation
The output end of amplifier connects the base stage of first triode, reverse side ground connection；The second end of the switching circuit, described
The cathode of two diodes, the third diode cathode connect the collector of first triode；First triode
Emitter, the third diode plus earth.
4. less voltage protector according to claim 3, which is characterized in that the benchmark voltage-stablizer is TL431 benchmark
Linear voltage regulator.
5. less voltage protector according to claim 1, which is characterized in that the switching circuit include second resistance,
3rd resistor, the 4th resistance and the second triode；
One end of the second resistance connects the anode of the benchmark voltage-stablizer；The other end of the second resistance, the third
One end of resistance connects the base stage of second triode；The other end of the 3rd resistor connects the hair of second triode
Emitter-base bandgap grading；The emitter of second triode connects the external input power, and collector connects one end of the 4th resistance；
The other end of 4th resistance connects the input terminal of the hysteresis circuitry.
6. less voltage protector according to claim 1, which is characterized in that the bleeder circuit include the 5th resistance with
And the 6th resistance；
One end of 5th resistance, one end of the 6th resistance connect the reference edge of the benchmark voltage-stablizer；Described 5th
The other end of resistance connects the external input power；The other end of 6th resistance is grounded.
7. according to the less voltage protector described in claim 1 to 6 any one, which is characterized in that further include voltage output
Module；
The input terminal of the voltage output module, the hysteresis circuitry input terminal connect the defeated of the control source detection module
Outlet；The output end of the voltage output module connects driving circuit.
8. less voltage protector according to claim 7, which is characterized in that the voltage output module includes the three or three
Pole pipe and the 4th triode；
The third end of the switching circuit, the input terminal of the hysteresis circuitry connect the base stage of the third transistor；Described
The collector of three triodes connects external power supply, emitter ground connection；The base stage of 4th triode connects the three or three pole
The collector of pipe, collector connect the driving circuit, transmitting collection ground connection.
9. less voltage protector according to claim 7, which is characterized in that the driving circuit is backlight drive electricity
Road.
10. less voltage protector according to claim 7, which is characterized in that the external input power is TV
Externally fed power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820161929.6U CN207994604U (en) | 2018-01-29 | 2018-01-29 | Less voltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820161929.6U CN207994604U (en) | 2018-01-29 | 2018-01-29 | Less voltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207994604U true CN207994604U (en) | 2018-10-19 |
Family
ID=63821656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820161929.6U Active CN207994604U (en) | 2018-01-29 | 2018-01-29 | Less voltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207994604U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957698A (en) * | 2019-11-29 | 2020-04-03 | 茂硕电源科技股份有限公司 | Protective circuit for electrical equipment |
| CN111509694A (en) * | 2020-04-02 | 2020-08-07 | 无锡艾为集成电路技术有限公司 | Chip, undervoltage latch circuit and working method thereof |
| WO2020253047A1 (en) * | 2019-06-21 | 2020-12-24 | 天佑电器（苏州）有限公司 | Machine operation circuit, and vacuum cleaner comprising same |
-
2018
- 2018-01-29 CN CN201820161929.6U patent/CN207994604U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020253047A1 (en) * | 2019-06-21 | 2020-12-24 | 天佑电器（苏州）有限公司 | Machine operation circuit, and vacuum cleaner comprising same |
| CN110957698A (en) * | 2019-11-29 | 2020-04-03 | 茂硕电源科技股份有限公司 | Protective circuit for electrical equipment |
| CN111509694A (en) * | 2020-04-02 | 2020-08-07 | 无锡艾为集成电路技术有限公司 | Chip, undervoltage latch circuit and working method thereof |
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