CN208226559U - A kind of Switching Power Supply with over-and under-voltage defencive function - Google Patents
A kind of Switching Power Supply with over-and under-voltage defencive function Download PDFInfo
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- CN208226559U CN208226559U CN201721718940.XU CN201721718940U CN208226559U CN 208226559 U CN208226559 U CN 208226559U CN 201721718940 U CN201721718940 U CN 201721718940U CN 208226559 U CN208226559 U CN 208226559U
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Abstract
The utility model discloses a kind of Switching Power Supplies with over-and under-voltage defencive function, over-voltage or under-voltage protection can be carried out to Switching Power Supply, when there is over-voltage or undervoltage condition, overvoltage crowbar or under-voltage protecting circuit are started to work, it will be in outputs level signals to PWM controller, PWM controller will be off after receiving signal, realize the purpose of over-voltage or under-voltage protection, it is provided with reference voltage circuit, overvoltage crowbar, under-voltage protecting circuit, the reference voltage circuit is connected with the input terminal of under-voltage protecting circuit and overvoltage crowbar respectively, overvoltage crowbar connects prime current rectifying and wave filtering circuit with under-voltage protecting circuit, the overvoltage crowbar and under-voltage protecting circuit are all connected with PWM controller, signal acquisition is carried out by the outlet side in prime current rectifying and wave filtering circuit, so that entire circuit structure Stability is higher.
Description
Technical field
The utility model relates to the fields such as power technology, PWM technology, are a kind of with over-and under-voltage protection specifically
The Switching Power Supply of function.
Background technique
Power supply is to provide the device of power, also referred to as power supply unit to electronic equipment, it provides all components in computer
Required electric energy.Whether the size of power, electric current and voltage are stable, by the working performance for directly affecting computer and make
Use the service life.
Switching Power Supply is the time ratio that control switch pipe turns on and off using modern power electronics technology, remains steady
Determine a kind of power supply of output voltage, Switching Power Supply is generally made of pulse width modulation (PWM) control IC and MOSFET.With electricity
The development and innovation of power electronic technology, so that switch power technology is also innovated constantly.Currently, Switching Power Supply is with small-sized, light
Amount and efficient feature are widely used almost all of electronic equipment, are that current electronics and information industry rapid development is indispensable
A kind of few power mode.
Switching Power Supply product is widely used in industrial automatic control, military industry equipment, research equipment, LED illumination, industry control are set
Standby, communication apparatus, power equipment, instrument and meter, Medical Devices, semiconductor refrigerating heating, air purifier, electronic refrigerator, liquid
Crystal display, LED lamp, communication apparatus, audio-visual products, safety monitoring, LED light bag, computer housing, digital product and instrument class
Equal fields.
Pulse width modulation (PWM) is non-come the one kind controlled analog circuit using the numeral output of microprocessor
Normal effective technology is widely used in from measurement, communicates into many fields of power control and transformation.
Pulse width modulation is a kind of analog control mode, according to the variation of respective loads come modulation transistor base stage or
The biasing of metal-oxide-semiconductor grid, to realize the change of transistor or metal-oxide-semiconductor turn-on time, to realize switching power supply output
Change.This mode can be such that the output voltage of power supply keeps constant in operation conditions change, be the number using microprocessor
A kind of very effective technology that signal controls analog circuit.
PWM control technology is simple with its control, flexibly and the good advantage of dynamic response and it is most wide as power electronic technique
The control mode of general application and the hot spot of people's research.Since the development of current science and technology is without between subject
Boundary, in conjunction with modern control theory thought or realize resonance free wave switching technique will become PWM control technology develop master
Want one of direction.It changes according to respective loads come the biasing of modulation transistor base stage or metal-oxide-semiconductor grid, to realize transistor
Or the change of metal-oxide-semiconductor turn-on time, to realize the change of switching power supply output.This mode can make the output electricity of power supply
Kept constant when being pressed in operation conditions change, be using microprocessor digital signal to analog circuit controlled one kind it is non-
Normal effective technology.
With the development of electronic technology, there are a variety of PWM technologies, including: phase voltage controls PWM, pulsewidth PWM
Method, random PWM, SPWM method, line voltage control PWM etc., and the pulsewidth PWM method used in nickel-hydrogen battery smart charger, it
It is spike train that each pulse width is equal as PWM waveform, the period by changing spike train can change arteries and veins with frequency modulation
The width or duty ratio of punching can be such that voltage and frequency coordination changes with pressure regulation using suitable control method.Tune can be passed through
The period of whole PWM, the duty ratio of PWM and achieve the purpose that control charging current.
Pulsewidth modulation (PWM) basic principle: control mode is exactly to control the on-off of inverter circuit switching device, is made
Output end obtains a series of equal pulse of amplitudes, and sine wave or required waveform are replaced with these pulses.Namely exist
Multiple pulses are generated in the half period of output waveform, the equal threshold voltages of each pulse is made to be positive string waveform, and output obtained is flat
Sliding and low-order harmonic is few.The width of each pulse is modulated by certain rule, i.e., changeable inverter circuit output voltage
Output frequency also can be changed in size.
Switching Power Supply easily causes to damage if there is the case where under-voltage or over-voltage in input side to entire Switching Power Supply, thus
The service life of Switching Power Supply is influenced, while also influencing the use of circuit to be powered, one kind can monitoring input voltage be in time thus
It is no there are over-voltage or under-voltage Switching Power Supply, needed for actually urgent.It is provided with prime current rectifying and wave filtering circuit in Switching Power Supply, uses
In by alternating current carry out rectifying and wave-filtering processing, and arrive the poor direct current of ripple voltage；PWM controller, by adjusting duty
Than so that the output of Switching Power Supply reaches stablizing effect.
Utility model content
The purpose of this utility model is to provide a kind of Switching Power Supplies with over-and under-voltage defencive function, can be to switch
Power supply carries out over-voltage or under-voltage protection, and when there is over-voltage or undervoltage condition, overvoltage crowbar or under-voltage protecting circuit start
Work, by outputs level signals to PWM controller, PWM controller will be off after receiving signal, realize over-voltage or under-voltage guarantor
The purpose of shield.
The utility model is achieved through the following technical solutions: a kind of Switching Power Supply with over-and under-voltage defencive function, if
Be equipped with reference voltage circuit, overvoltage crowbar, under-voltage protecting circuit, the reference voltage circuit respectively with under-voltage protecting circuit
It is connected with the input terminal of overvoltage crowbar, overvoltage crowbar connects prime current rectifying and wave filtering circuit with under-voltage protecting circuit,
The overvoltage crowbar and under-voltage protecting circuit are all connected with PWM controller.
Further is that the utility model is better achieved, and especially uses following setting structures: the overvoltage crowbar
Input circuit, over-voltage benchmark input circuit are detected including amplifier chip U1A, over-voltage, the prime current rectifying and wave filtering circuit passed through
The non-inverting input terminal of pressure detection input circuit connection amplifier chip U1A, reference voltage circuit connect over-voltage benchmark input circuit, mistake
Press the inverting input terminal of benchmark input circuit connection amplifier chip U1A, the output end of amplifier chip U1A by diode D1 with
PWM controller is connected.Preferred diode D1 uses light emitting diode, and the anode connection amplifier chip U1A of diode D1
Output end.
Further is that the utility model is better achieved, and especially uses following setting structures: the over-voltage detection input
Circuit includes resistance R1, resistance R2, resistance R3, resistance R4 and capacitor C1, the first end connection prime rectifying and wave-filtering electricity of resistance R1
Road, the second end of resistance R1 are connected with the first end of the first end of resistance R2, the first end of capacitor C1 and resistance R3 respectively, electricity
The second end of resistance R2 is connected and is grounded with the second end of the second end of capacitor C1 and resistance R4 respectively, the second end point of resistance R3
It is not connected with the non-inverting input terminal of the first end of resistance R4 and amplifier chip U1A.
Further is that the utility model is better achieved, and especially uses following setting structures: the over-voltage benchmark input
Circuit includes resistance R6 and resistance R5, and resistance R5 and resistance R6 are serially connected, and the connects end altogether of concatenated resistance R5 and resistance R6
The inverting input terminal of amplifier chip U1A, the non-connects end altogether ground connection of resistance R5 are connected, the non-connects end altogether of resistance R6 connects reference voltage
The output end (inverting input terminal that reference voltage source passes through resistance R6 connection amplifier chip U1A) of circuit.
Further is that the utility model is better achieved, and especially uses following setting structures: the under-voltage protecting circuit
Including amplifier chip U1B, under-voltage detection input circuit, under-voltage benchmark input circuit, the prime current rectifying and wave filtering circuit is by owing
The inverting input terminal of pressure detection input circuit connection amplifier chip U1B, reference voltage circuit connect under-voltage benchmark input circuit, owe
Press the non-inverting input terminal of benchmark input circuit connection amplifier chip U1B, the output end of amplifier chip U1B by diode D2 with
PWM controller is connected.Preferred diode D2 uses light emitting diode, and the anode connection amplifier chip U1B of diode D2
Output end.
Further is that the utility model is better achieved, and especially uses following setting structures: the under-voltage detection input
Circuit includes resistance R7, resistance R8, resistance R9, resistance R4 and capacitor C2, the first end connection prime rectifying and wave-filtering electricity of resistance R7
Road, the second end of resistance R7 are connected with the first end of the first end of resistance R8, the first end of capacitor C2 and resistance R9 respectively, electricity
The second end of resistance R8 is connected and is grounded with the second end of the second end of capacitor C2 and resistance R10 respectively, the second end of resistance R9
It is connected respectively with the inverting input terminal of the first end of resistance R10 and amplifier chip U1B.
Further is that the utility model is better achieved, and especially uses following setting structures: the under-voltage benchmark input
Circuit includes resistance R12 and resistance R11, and resistance R12 and resistance R11 are serially connected, and concatenated resistance R11 and resistance R12
Connects end altogether connects the non-inverting input terminal of amplifier chip U1B, the non-connects end altogether ground connection of resistance R11, the non-connects end altogether connection of resistance R12
The output end (non-inverting input terminal that reference voltage source passes through resistance R12 connection amplifier chip U1B) of reference voltage circuit.
Further is that the utility model is better achieved, and especially uses following setting structures: the reference voltage circuit
Including reference voltage source and the zener diode Z1 and resistance R13 that are serially connected, and the output end of reference voltage source connects over-voltage
Circuit and under-voltage protecting circuit are protected, reference voltage source passes through the zener diode Z1 being serially connected and resistance R13 ground connection.
Further is that the utility model is better achieved, and especially uses following setting structures: the zener diode Z1
Anode connection resistance R13, zener diode DZ1 cathode connection reference voltage source output end.
The utility model compared with prior art, have the following advantages that and the utility model has the advantages that
The utility model can carry out over-voltage or under-voltage protection, when there is over-voltage or undervoltage condition, mistake to Switching Power Supply
Voltage protection circuit or under-voltage protecting circuit are started to work, and by outputs level signals to PWM controller, PWM controller receives letter
It will be off after number, realize the purpose of over-voltage or under-voltage protection.
The utility model carries out signal acquisition by the outlet side in prime current rectifying and wave filtering circuit, so that entire circuit structure
Stability it is higher.
The mode that the utility model uses voltage-stabiliser tube and reference voltage source to match is overvoltage crowbar or under-voltage protection
Circuit is by reference voltage, so that the stability and precision of the two are higher, can effectively realize overvoltage protection or/and owe
Press the purpose of protection.
The utility model carries out the data between overvoltage protection or under-voltage protection and PWM controller using light emitting diode and passes
It is defeated, it can allow user that can understand and know that protection circuit is starting to act.
Detailed description of the invention
Fig. 1 is the utility model circuit diagram.
Specific embodiment
The utility model is described in further detail below with reference to embodiment, but the embodiments of the present invention is not
It is limited to this.
Embodiment 1:
A kind of Switching Power Supply with over-and under-voltage defencive function can carry out over-voltage or under-voltage protection to Switching Power Supply,
When there is over-voltage or undervoltage condition, overvoltage crowbar or under-voltage protecting circuit are started to work, by outputs level signals to PWM
On controller, PWM controller will be off after receiving signal, the purpose of over-voltage or under-voltage protection be realized, as shown in Figure 1, especially
Using following setting structures: being provided with reference voltage circuit, overvoltage crowbar, under-voltage protecting circuit, the reference voltage electricity
Road is connected with the input terminal of under-voltage protecting circuit and overvoltage crowbar respectively, and overvoltage crowbar and under-voltage protecting circuit connect
Prime current rectifying and wave filtering circuit is connect, the overvoltage crowbar and under-voltage protecting circuit are all connected with PWM controller, by preceding
The outlet side of grade current rectifying and wave filtering circuit carries out signal acquisition, so that the stability of entire circuit structure is higher.
Embodiment 2:
The present embodiment is further optimized based on the above embodiments, as shown in Figure 1, further is preferably real
Existing the utility model, especially uses following setting structures: the overvoltage crowbar includes that amplifier chip U1A, over-voltage detection are defeated
Enter circuit, over-voltage benchmark input circuit, the prime current rectifying and wave filtering circuit detects input circuit by over-voltage and connects amplifier chip
The non-inverting input terminal of U1A, reference voltage circuit connect over-voltage benchmark input circuit, and over-voltage benchmark input circuit connects amplifier chip
The output end of the inverting input terminal of U1A, amplifier chip U1A is connected by diode D1 with PWM controller.Preferred diode
D1 uses light emitting diode, and the output end of the anode connection amplifier chip U1A of diode D1；It was carried out using light emitting diode
Pressure protection or the data transmission between under-voltage protection and PWM controller can allow user that can understand what protection knows is
Circuit is starting to act.
Embodiment 3:
The present embodiment is to advanced optimize based on any of the above embodiments, as shown in Figure 1, being further more preferable
The utility model is realized on ground, especially uses following setting structures: the over-voltage detection input circuit include resistance R1, resistance R2,
Resistance R3, resistance R4 and capacitor C1, the first end of resistance R1 connect prime current rectifying and wave filtering circuit, the second end of resistance R1 respectively with
The first end of the first end of resistance R2, the first end of capacitor C1 and resistance R3 is connected, the second end of resistance R2 respectively with capacitor
The second end of C1 and the second end of resistance R4 are connected and are grounded, the second end of resistance R3 respectively with the first end and fortune of resistance R4
The non-inverting input terminal for putting chip U1A is connected.
Embodiment 4:
The present embodiment is to advanced optimize based on any of the above embodiments, as shown in Figure 1, being further more preferable
The utility model is realized on ground, and especially use following setting structures: the over-voltage benchmark input circuit includes resistance R6 and resistance R5,
Resistance R5 and resistance R6 are serially connected, and the reverse phase that concatenated resistance R5 connects amplifier chip U1A with the connects end altogether of resistance R6 is defeated
Enter end, the non-connects end altogether ground connection of resistance R5, the output end (reference voltage source of the non-connects end altogether connection reference voltage circuit of resistance R6
Pass through the inverting input terminal of resistance R6 connection amplifier chip U1A).
Embodiment 5:
The present embodiment is to advanced optimize based on any of the above embodiments, as shown in Figure 1, being further more preferable
The utility model is realized on ground, and especially use following setting structures: the under-voltage protecting circuit includes amplifier chip U1B, under-voltage inspection
Input circuit, under-voltage benchmark input circuit are surveyed, the prime current rectifying and wave filtering circuit connects amplifier by under-voltage detection input circuit
The inverting input terminal of chip U1B, reference voltage circuit connect under-voltage benchmark input circuit, and under-voltage benchmark input circuit connects amplifier
The output end of the non-inverting input terminal of chip U1B, amplifier chip U1B is connected by diode D2 with PWM controller.Preferred two
Pole pipe D2 use light emitting diode, and diode D2 anode connection amplifier chip U1B output end, using light emitting diode into
Data transmission between row overvoltage protection or under-voltage protection and PWM controller, can allow user that can understand know that is
Protection circuit is starting to act.
Embodiment 6:
The present embodiment is to advanced optimize based on any of the above embodiments, as shown in Figure 1, being further more preferable
The utility model is realized on ground, especially uses following setting structures: the under-voltage detection input circuit include resistance R7, resistance R8,
Resistance R9, resistance R4 and capacitor C2, the first end of resistance R7 connect prime current rectifying and wave filtering circuit, the second end of resistance R7 respectively with
The first end of the first end of resistance R8, the first end of capacitor C2 and resistance R9 is connected, the second end of resistance R8 respectively with capacitor
The second end of C2 and the second end of resistance R10 are connected and are grounded, the second end of resistance R9 respectively with the first end of resistance R10 and
The inverting input terminal of amplifier chip U1B is connected.
Embodiment 7:
The present embodiment is to advanced optimize based on any of the above embodiments, as shown in Figure 1, being further more preferable
The utility model is realized on ground, and especially use following setting structures: the under-voltage benchmark input circuit includes resistance R12 and resistance
R11, resistance R12 and resistance R11 are serially connected, and concatenated resistance R11 connects amplifier chip U1B with the connects end altogether of resistance R12
Non-inverting input terminal, resistance R11 non-connects end altogether ground connection, resistance R12 non-connects end altogether connection reference voltage circuit output end
(non-inverting input terminal that reference voltage source passes through resistance R12 connection amplifier chip U1B).
Embodiment 8:
The present embodiment is to advanced optimize based on any of the above embodiments, as shown in Figure 1, being further more preferable
The utility model is realized on ground, and especially use following setting structures: the reference voltage circuit includes reference voltage source and mutually goes here and there
The zener diode Z1 and resistance R13 of connection, and the output end connection overvoltage crowbar and under-voltage protecting circuit of reference voltage source,
Reference voltage source passes through the zener diode Z1 being serially connected and resistance R13 ground connection, is matched using voltage-stabiliser tube and reference voltage source
The mode of conjunction is overvoltage crowbar or under-voltage protecting circuit by reference voltage, so that the stability and precision of the two are more
Height can effectively realize the purpose of overvoltage protection or/and under-voltage protection.
Embodiment 9:
The present embodiment is to advanced optimize based on any of the above embodiments, as shown in Figure 1, being further more preferable
The utility model is realized on ground, especially uses following setting structures: the anode connection resistance R13 of the zener diode Z1, pressure stabilizing
The output end of the cathode connection reference voltage source of diode DZ1.
In setting, preferred amplifier chip U1A and amplifier chip U1B are all double using same using single amplifier or both
Two amplifier units in amplifier are realized.
When in use, the sampling voltage of overvoltage crowbar and under-voltage protecting circuit is all from the filter of prime current rectifying and wave filtering circuit
Voltage after wave；Sampling voltage is divided into two-way, inputs (amplifier after resistance R1, resistance R2, resistance R3, resistance R4 partial pressure all the way
Chip) comparator U1A non-inverting input terminal, as sampling voltage be higher than comparator U1A inverting input terminal reference voltage, comparator
The output end output high level of U1A goes control PWM controller to turn it off, and power supply achievees the purpose that overvoltage protection without output.Separately
The inverting input terminal of (amplifier chip) comparator U1B is inputted after resistance R7, resistance R8, resistance R9, resistance R10 partial pressure all the way,
If sampling voltage is higher than the reference voltage of comparator U1B non-inverting input terminal, the output end output high level of comparator U1B goes to control
PWM controller turns it off, and power supply achievees the purpose that under-voltage protection without output.
The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model
System, any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent variations, each falls within
Within the protection scope of the utility model.
Claims (7)
1. a kind of Switching Power Supply with over-and under-voltage defencive function, it is characterised in that: be provided with reference voltage circuit, over-voltage is protected
Protection circuit, under-voltage protecting circuit, the reference voltage circuit input terminal with under-voltage protecting circuit and overvoltage crowbar respectively
It is connected, overvoltage crowbar connects prime current rectifying and wave filtering circuit with under-voltage protecting circuit, the overvoltage crowbar and under-voltage
Protection circuit is all connected with PWM controller；The overvoltage crowbar include amplifier chip U1A, over-voltage detection input circuit,
Over-voltage benchmark input circuit, the prime current rectifying and wave filtering circuit detect input circuit by over-voltage and connect the same of amplifier chip U1A
Phase input terminal, reference voltage circuit connect over-voltage benchmark input circuit, and over-voltage benchmark input circuit connects the anti-of amplifier chip U1A
The output end of phase input terminal, amplifier chip U1A is connected by diode D1 with PWM controller；The under-voltage protecting circuit packet
Amplifier chip U1B, under-voltage detection input circuit, under-voltage benchmark input circuit are included, the prime current rectifying and wave filtering circuit passes through under-voltage
The inverting input terminal of input circuit connection amplifier chip U1B is detected, reference voltage circuit connects under-voltage benchmark input circuit, under-voltage
Benchmark input circuit connects the non-inverting input terminal of amplifier chip U1B, and the output end of amplifier chip U1B passes through diode D2 and PWM
Controller is connected.
2. a kind of Switching Power Supply with over-and under-voltage defencive function according to claim 1, it is characterised in that: the mistake
Pressure detection input circuit includes resistance R1, resistance R2, resistance R3, resistance R4 and capacitor C1, and the first end of resistance R1 connects prime
Current rectifying and wave filtering circuit, the second end of resistance R1 respectively with the first end of resistance R2, the first end of capacitor C1 and resistance R3 first
End is connected, and the second end of resistance R2 is connected and is grounded with the second end of the second end of capacitor C1 and resistance R4 respectively, resistance
The second end of R3 is connected with the non-inverting input terminal of the first end of resistance R4 and amplifier chip U1A respectively.
3. a kind of Switching Power Supply with over-and under-voltage defencive function according to claim 2, it is characterised in that: the mistake
Pressing benchmark input circuit includes resistance R6 and resistance R5, and resistance R5 and resistance R6 are serially connected, and concatenated resistance R5 and resistance
The inverting input terminal of the connects end altogether connection amplifier chip U1A of R6, the non-connects end altogether ground connection of resistance R5, the non-connects end altogether of resistance R6 connect
Connect the output end of reference voltage circuit.
4. a kind of Switching Power Supply with over-and under-voltage defencive function according to claim 1, it is characterised in that: described to owe
Pressure detection input circuit includes resistance R7, resistance R8, resistance R9, resistance R4 and capacitor C2, and the first end of resistance R7 connects prime
Current rectifying and wave filtering circuit, the second end of resistance R7 respectively with the first end of resistance R8, the first end of capacitor C2 and resistance R9 first
End is connected, and the second end of resistance R8 is connected and is grounded with the second end of the second end of capacitor C2 and resistance R10 respectively, resistance
The second end of R9 is connected with the inverting input terminal of the first end of resistance R10 and amplifier chip U1B respectively.
5. a kind of Switching Power Supply with over-and under-voltage defencive function according to claim 4, it is characterised in that: described to owe
Press benchmark input circuit include resistance R12 and resistance R11, resistance R12 and resistance R11 are serially connected, and concatenated resistance R11 and
The non-inverting input terminal of the connects end altogether connection amplifier chip U1B of resistance R12, the non-connects end altogether ground connection of resistance R11, resistance R12's is non-
The output end of connects end altogether connection reference voltage circuit.
6. a kind of Switching Power Supply with over-and under-voltage defencive function according to claim 1-5, feature exist
In: the reference voltage circuit include reference voltage source and the zener diode Z1 and resistance R13 that are serially connected, and reference voltage
The output end connection overvoltage crowbar and under-voltage protecting circuit in source, reference voltage source pass through the zener diode Z1 being serially connected
It is grounded with resistance R13.
7. a kind of Switching Power Supply with over-and under-voltage defencive function according to claim 6, it is characterised in that: described steady
Press the output end of the cathode connection reference voltage source of anode connection the resistance R13, zener diode DZ1 of diode Z1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721718940.XU CN208226559U (en) | 2017-12-12 | 2017-12-12 | A kind of Switching Power Supply with over-and under-voltage defencive function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721718940.XU CN208226559U (en) | 2017-12-12 | 2017-12-12 | A kind of Switching Power Supply with over-and under-voltage defencive function |
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| CN208226559U true CN208226559U (en) | 2018-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947121A (en) * | 2017-12-12 | 2018-04-20 | 成都爱特联科技有限公司 | A kind of Switching Power Supply with over-and under-voltage defencive function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947121A (en) * | 2017-12-12 | 2018-04-20 | 成都爱特联科技有限公司 | A kind of Switching Power Supply with over-and under-voltage defencive function |
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Address after: 215500 room 316, building 1, No.2 Yunshen Road, Southeast street, Changshu City, Suzhou City, Jiangsu Province Patentee after: Suzhou Lingke Microelectronics Technology Co.,Ltd. Address before: 210000 Room 501, block B, Kechuang headquarters building, 88 pubin Avenue, Jiangpu street, Pukou District, Nanjing City, Jiangsu Province Patentee before: NANJING LINGKE MICROELECTRONIC TECHNOLOGY Co.,Ltd. |