CN209169943U - Circuit of synchronous rectification, synchronous rectification protective device and charger - Google Patents
Circuit of synchronous rectification, synchronous rectification protective device and charger Download PDFInfo
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- CN209169943U CN209169943U CN201920035863.0U CN201920035863U CN209169943U CN 209169943 U CN209169943 U CN 209169943U CN 201920035863 U CN201920035863 U CN 201920035863U CN 209169943 U CN209169943 U CN 209169943U
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Abstract
The utility model embodiment is related to a kind of circuit of synchronous rectification, synchronous rectification protective device and charger; wherein circuit of synchronous rectification includes transformer, the first power tube, synchronous rectification protective device and primary controller, and synchronous rectification protective device includes temperature detecting unit；Transformer includes armature winding, secondary windings and auxiliary winding；One end of armature winding connects power supply, and the other end of armature winding is connect with the drain electrode of the first power tube；Secondary windings is connect with synchronous rectification protective device；Auxiliary winding is connect with primary controller；When temperature detecting unit detects the temperature of circuit of synchronous rectification more than preset first temperature threshold; secondary windings sends Thermal protection starting impulse signal; the starting impulse signal is transferred to primary controller by auxiliary winding, and primary controller carries out decoding to the starting impulse signal and sends shutdown signal to the first power tube.
Description
Technical field
The utility model belongs to field of switch power more particularly to a kind of circuit of synchronous rectification, synchronous rectification protective device
And charger.
Background technique
With the rapid development of big screen intelligent mobile phone, cell phone battery capacity is increasing, correspondingly, the charging to battery
Rate request is higher and higher.
Some super fast charges in the prior art and sudden strain of a muscle are filled, and charging current is up to 5A, if two pole of secondary side afterflow
Pipe uses general Schottky, it will has the power consumption of 2w, then these power consumptions will be all wasted in above freewheeling diode.For
The loss of freewheeling diode is solved, most of fast chargers use circuit of synchronous rectification to replace freewheeling diode mostly, this
Sample replaces freewheeling diode using internal synchronous rectification mos pipe, it is only necessary to the energy consumption of 0.2W is consumed, to greatly improve charging effect
Rate.
However, in the actual application process, when in case of output par, c short circuit or other abnormal conditions, will cause
Circuit of synchronous rectification persistent fever, and primary-side-control chip and power tube are in normal temperature range, then can not start primary side
The Thermal protection of control, and whole system still works by existing power, will result in circuit of synchronous rectification temperature increasingly
Height, or even burn chip.
Therefore, it for above situation, i.e., in case of output par, c short circuit or other abnormal conditions, causes to synchronize whole
Current circuit persistent fever, (such as 130 degree to 150 degree) have when general synchronous rectification control chip is more than certain temperature for temperature
Following two response mode:
First is that due to not having Thermal protection unit, circuit of synchronous rectification continues to generate heat；
Two, which are that while to be provided with Thermal protection unit in the prior art, is used to turn off power tube built in synchronous rectification, but this
When be connected by the body diode of power tube itself parasitism, since diode drop is in 0.7V, so the calorific value of conducting is higher,
That is circuit of synchronous rectification is virtually free from heat protection function, once so circuit of synchronous rectification enters the Thermal protection stage, very
It may result in power tube damage, further influence the use of entire charger.
Utility model content
In view of this, the present invention provides a kind of circuit of synchronous rectification, synchronous rectification protective device and chargers, same
Temperature detecting unit is set in step rectification protective device, when the temperature detecting unit detects that the temperature of circuit of synchronous rectification is super
When crossing preset first temperature threshold, the synchronous rectification protective device sends Thermal protection enabling signal, the heat to secondary windings
Enabling signal is protected to be transferred to primary controller by auxiliary winding, primary controller is closed after receiving the Thermal protection enabling signal
Close the first power tube；When the temperature detecting unit detects the temperature of the circuit of synchronous rectification lower than preset second temperature
When threshold value, the synchronous rectification protective device sends Thermal protection shutdown signal to secondary windings, and the Thermal protection shutdown signal is logical
It crosses auxiliary winding and is transferred to primary controller, primary controller opens the first power tube after receiving the Thermal protection shutdown signal.
The technical solution of the utility model is:
In a first aspect, the utility model embodiment provides a kind of circuit of synchronous rectification, including transformer, the first power
Pipe, synchronous rectification protective device and primary controller, the synchronous rectification protective device includes temperature detecting unit；
The transformer includes armature winding, secondary windings and auxiliary winding；One end of armature winding connects power supply, primary
The other end of winding is connect with the drain electrode of the first power tube；Secondary windings is connect with synchronous rectification protective device；Auxiliary winding with
Primary controller connection；Synchronous rectification protective device and secondary windings with a capacitance connection；
Auxiliary winding is connect by two divider resistances with primary controller；The grid of primary controller and the first power tube
It is connected.
Second aspect, the utility model embodiment provide a kind of synchronous rectification protective device of for transformer circuit,
The transformer circuit includes armature winding, secondary windings, auxiliary winding, the first power tube and primary controller,
The synchronous rectification protective device includes temperature detecting unit, the second power tube and switch controller, the temperature
The output end of detection unit and one end of switch controller connect, and the other end of switch controller is connect with the second power tube；
Synchronous rectification protective device and secondary windings with a capacitance connection；Auxiliary winding passes through two divider resistances and original
The connection of side controller；Primary controller is connected with the grid of the first power tube.
The third aspect, the utility model embodiment provide a kind of charger, and the charger includes described above same
Walk rectification circuit.
Fourth aspect, the utility model embodiment provide a kind of charger, and the charger includes described above same
Step rectification protective device.
The utility model embodiment is by being arranged temperature detecting unit in synchronous rectification protective device, when the temperature is examined
Survey unit detect circuit of synchronous rectification temperature be more than preset first temperature threshold when, the synchronous rectification protective device to
Secondary windings sends Thermal protection enabling signal, which is transferred to primary controller, primary side by auxiliary winding
Controller closes the first power tube after receiving the Thermal protection enabling signal；When the temperature detecting unit detects the synchronization
When the temperature of rectification circuit is lower than preset second temperature threshold value, the synchronous rectification protective device sends heat to secondary windings and protects
Shutdown signal is protected, the Thermal protection shutdown signal is transferred to primary controller by auxiliary winding, and primary controller is receiving this
The first power tube is opened after Thermal protection shutdown signal；Realize that the heat of the circuit of synchronous rectification in the utility model embodiment is protected with this
Shield, to reduce the damage of the first power tube.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of circuit of synchronous rectification provided by the embodiment of the utility model；
Fig. 2 is a kind of applications schematic diagram of circuit of synchronous rectification provided by the embodiment of the utility model；
Fig. 3 is a kind of structural schematic diagram of synchronous rectification protective device provided by the embodiment of the utility model.
Wherein, 10 be the first power tube；20 be synchronous rectification protective device；30 be primary controller；L0For armature winding,
L1For secondary windings, L2For auxiliary winding；R1For first resistor, R2For second resistance；C is capacitor.
Specific embodiment
The utility model is described in detail in each embodiment shown in reference to the accompanying drawing, but it should be stated that,
These embodiments are not limitation of the utility model, those of ordinary skill in the art according to these embodiments made by function
Energy, method or equivalent transformation or substitution in structure, belong within the protection scope of the utility model.
Embodiment one
One, the structure of circuit of synchronous rectification
Fig. 1 is a kind of structural schematic diagram of circuit of synchronous rectification provided by the embodiment of the utility model, and Fig. 3 is that this is practical new
A kind of structural schematic diagram for synchronous rectification protective device that type embodiment provides；Referring to Fig. 1 and 3, a kind of circuit of synchronous rectification, packet
Include transformer, the first power tube 10, synchronous rectification protective device 20 and primary controller 30, the synchronous rectification protective device 20
Including temperature detecting unit；Can be by the base emitter junction of diode or triode in the present embodiment, i.e., PN junction is as thermal element
Part, with the temperature for detecting circuit of synchronous rectification；
The transformer includes armature winding L0, secondary windings L1With auxiliary winding L2；Armature winding L0One end connect electricity
Source, armature winding L0The other end connect with the drain electrode of the first power tube 10；Secondary windings L1Connect with synchronous rectification protective device 20
It connects；Auxiliary winding L2It is connect with primary controller 30；Synchronous rectification protective device and secondary windings with a capacitance connection；Auxiliary
Winding is connect by two divider resistances with primary controller；Primary controller is connected with the grid of the first power tube.
Synchronous rectification protective device 20 in the present embodiment further includes the second power tube, switch controller, the temperature inspection
One end of the output end and switch controller of surveying unit connects, and the other end of switch controller is connect with the second power tube；Temperature
Detection unit can be using the PN junction of diode or triode as temperature-sensitive element.The forward voltage of PN junction depends on the band gap of silicon,
Its temperature coefficient is also unrelated with technique, and substantially -2mV/ DEG C.Do not have by the output to the temperature-sensitive element and the base of temperature coefficient
Quasi- voltage compares, and is able to detect whether the temperature-sensitive element is more than certain temperature.Reference voltage is set as and temperature-sensitive element is in mistake
Output voltage at hot temperature is equal.Using the output voltage of temperature-sensitive element and reference voltage as the positive negative input of comparator, when reaching
When to thermal shutdown temperature, two voltages are equal, the output switching activity of comparator, and switch controller controls the second power tube and sends Thermal protection
Enable signal.
Specifically, the first end of synchronous rectification protective device 20 is also connect with one end of capacitor C, synchronous rectification protective device
20 second end ground connection；The source electrode of first power tube 10 is grounded；
Secondary windings L1One end connect with capacitor C, the other end of capacitor C ground connection；
First resistor R1The other end and second resistance R2One end connection；
One termination of primary controller 30 is connected with the grid of the first power tube 10, the other end difference of primary controller 30
With first resistor R1The other end and second resistance R2One end connection, second resistance R2The other end ground connection；Preferably, described
First resistor R1For sampling resistor.
Preferably, the primary controller 30 can select the primary controller of model csc7158.
Fig. 2 is a kind of applications schematic diagram of circuit of synchronous rectification provided by the embodiment of the utility model；Referring to fig. 2,
In the present embodiment, the first power tube 10 can be encapsulated in primary controller 30, wherein armature winding L0First end connection
Power source loads, armature winding L0The pin 5 and 6 (draining) of the other end and primary controller 30 connect.Primary controller 30
The end pin 1-VDD and external loading R4One end connection, pin 3- feedback the end FB be connected to R1And R2Dividing point, pin 4-
Enabled pin CS and collector load resistor RCSOne end connection, RCSThe other end ground connection；
Secondary windings L1One end connect with the end SW (i.e. third end) of synchronous rectification protective device 20；Secondary windings L1Separately
The voltage VCC (i.e. first end) of one end and synchronous rectification protective device 20, which is held, to be connected；Capacitor C connection synchronous rectification protective device 20
Ground terminal (i.e. second end)；
Auxiliary winding L2One end connect first resistor R1It is connect with primary controller 30, auxiliary winding L2Another termination
Ground.
Two, the course of work of circuit of synchronous rectification
Temperature detecting unit is set in synchronous rectification protective device 20, when temperature detecting unit detects synchronous rectification electricity
When the temperature on road is than or equal to preset first temperature threshold, the synchronous rectification protective device is to secondary windings L1Send heat
Protect starting impulse signal, the second power tube in the Thermal protection starting impulse signal conduction synchronous rectification protective device 20, institute
It states and the Thermal protection starting impulse signal is transferred to secondary windings L after the second power tube is connected1, the secondary windings L1Immediately
Conducting, secondary windings L1Thermal protection starting impulse signal is passed through into auxiliary winding L2It is transferred to primary controller 30, primary-side-control
Device 30 carries out decoding to the Thermal protection starting impulse signal and sends shutdown signal to the first power tube 10；
When temperature detecting unit detects the temperature of the circuit of synchronous rectification lower than preset second temperature threshold value, institute
Synchronous rectification protective device is stated to secondary windings L1Send Thermal protection shutdown signal, the Thermal protection shutdown signal by auxiliary around
Group L is transferred to primary controller 30, primary controller 30 opened after receiving the Thermal protection shutdown signal the first power tube 10 with
This realizes the Thermal protection of the circuit of synchronous rectification of the present embodiment.
Specifically, the course of work of the circuit of synchronous rectification of one embodiment of the utility model is as follows:
Firstly, primary controller 30 sends open signal to the first power tube 10, first power tube 10 is opened, due to
The drain electrode of first power tube 10 and armature winding L0The other end connection, thus be armature winding L0Accumulation of energy, as former armature winding L0
Electric current when reaching preset current threshold, the first power tube 10 is closed, and the first power tube 10 is armature winding L0The mistake of accumulation of energy
Journey terminates.
Preferably, the preset current threshold can be according to output loading adjust automatically, such as can be 3A-5A；It can be with
Understand, which may be other numerical value, be not limited to the shown current range of this implementation.
Then, transformer passes through secondary windings L1Start to discharge, secondary windings L1By synchronous rectification protective device 20 to electricity
Hold C charging, the electricity that capacitor C substitutes the bad for the good will be used to give output loading (such as: charger, adapter etc.) power supply；
During the conducting of primary controller 30, the heat of circuit of synchronous rectification is in the accumulation stage, if synchronous rectification
When output circuit short circuit or other abnormal conditions occur for circuit, the electric current that will lead to temperature detecting unit increases sharply, so that
The temperature of entire circuit of synchronous rectification rises, when the temperature of circuit of synchronous rectification is than or equal to preset temperature threshold, then
The Thermal protection of circuit of synchronous rectification starts.
Preferably, the preset temperature threshold can be 130 °~150 °, it is to be understood that in other embodiments
In, the preset temperature threshold can also be the temperature value of other ranges, herein with no restrictions.
Specifically, the Thermal protection starting may comprise steps of:
Firstly, when the temperature of circuit of synchronous rectification is than or equal to preset temperature threshold, in secondary windings L1Occur
Synchronous rectification protective device 20 can be to secondary windings L in the time of secondary side demagnetization1Thermal protection starting impulse signal is sent, which protects
It protects starting impulse signal and passes through auxiliary winding L2And first resistor R1, second resistance R2It is transferred to primary controller 30；It is wherein described
Secondary side demagnetization generally refers to secondary windings L1In the process of electric discharge, process of the secondary inductance electric current from maximum value linear reduction；
Then, primary controller 30 decodes the Thermal protection starting impulse signal, obtains the number of secondary side Thermal protection
According to；
Then, primary controller 30 sends shutdown signal to the first power tube 10, and the first power tube 10 is closed, and leads to transformation
Device armature winding L0Can not accumulation of energy, i.e., no electric current pass through secondary windings L1It is transferred to primary controller 30, thus primary controller
30 temperature will reduce；
When temperature detecting unit detects the temperature of the circuit of synchronous rectification lower than preset second temperature threshold value, institute
Synchronous rectification protective device is stated to secondary windings L1Send Thermal protection shutdown signal, the Thermal protection shutdown signal by auxiliary around
Group L is transferred to primary controller 30, primary controller 30 opened after receiving the Thermal protection shutdown signal the first power tube 10 with
This realizes the Thermal protection of the circuit of synchronous rectification of the present embodiment.
Circuit of synchronous rectification in the present embodiment can be applied in reverse exciting switching voltage regulator, in order to improve synchronous rectification electricity
The efficiency on road, secondary windings L1Synchronous rectification can be used, once there are abnormal heating situation, entire synchronous rectifications for synchronous rectification
When circuit fever is than or equal to 130 °~150 ° or more, since the peak power output of the circuit of synchronous rectification is controlled by primary side
Controller 30, and secondary windings L1Synchronous rectification protective device 20 be only used for detection synchronous rectification protective device 20 temperature,
Itself can not close the switch state of the circuit of synchronous rectification, it is therefore desirable to primary controller 30 is transferred to by transformer, it is former
After side controller 30 receives Thermal protection signal, the first power tube 10 is closed；Preferably, hiccup weight can be passed through in the present embodiment
The mode of opening realizes the heat protection function of Integral synchronous rectification circuit, to restart the circuit of synchronous rectification.
Embodiment two
The present embodiment provides a kind of synchronous rectification protective device of for transformer circuit, the transformer circuit includes just
Grade winding L0, secondary windings L1, auxiliary winding L2, the first power tube 10 and primary controller 30,
The synchronous rectification protective device includes temperature detecting unit, the second power tube and switch controller, the temperature
The output end of detection unit and one end of switch controller connect, and the other end of switch controller is connect with the second power tube；Together
Step rectification protective device and secondary windings with a capacitance connection；Auxiliary winding is connected by two divider resistances and primary controller
It connects；Primary controller is connected with the grid of the first power tube.
Preferably, the second end ground connection of synchronous rectification protective device；The source electrode of first power tube 10 is grounded；
One end of capacitor C is grounded；First resistor R1The other end and second resistance R2One end connection；
The other end of primary controller respectively with first resistor R1The other end and second resistance R2One end connection, second
Resistance R2The other end ground connection.
Preferably, the temperature detecting unit is the PN junction of diode or triode.
Specifically, the temperature detecting unit in the present embodiment detects that the temperature of transformer circuit is more than preset first temperature
When spending threshold value, the synchronous rectification protective device is to secondary windings L1Send Thermal protection enabling signal, the Thermal protection enabling signal
Pass through auxiliary winding L2It is transferred to primary controller 30, primary controller 30 closes first after receiving the Thermal protection enabling signal
Power tube 10；
When the temperature detecting unit detects the temperature of the transformer circuit lower than preset second temperature threshold value,
The synchronous rectification protective device is to secondary windings L1Thermal protection shutdown signal is sent, the Thermal protection shutdown signal passes through auxiliary
Winding L2It is transferred to primary controller 30, primary controller 30 opens the first power tube after receiving the Thermal protection shutdown signal
10。
The work side of the synchronous rectification protective device 20 in synchronous rectification protective device and embodiment one in the present embodiment
Formula is consistent, and details are not described herein.
Embodiment three
The specific external structure of charger in the present embodiment can apply the prior art, in the present embodiment only to being related to
To circuit of synchronous rectification be illustrated.
Based on above-mentioned circuit of synchronous rectification, the utility model embodiment also provides a kind of including described in above-described embodiment one
The charger of circuit of synchronous rectification no longer specifically repeats the specific structure of circuit of synchronous rectification herein.
Example IV
The specific external structure of charger in the present embodiment can also apply the prior art, in the present embodiment only to relating to
And to synchronous rectification protective device be illustrated.
The utility model embodiment also provide it is a kind of including synchronous rectification protective device described in above-described embodiment three, herein
No longer specifically repeat the specific structure of synchronous rectification protective device.
The utility model has the beneficial effects that
The utility model embodiment is by being arranged temperature detecting unit in synchronous rectification protective device, when the temperature is examined
Survey unit detect circuit of synchronous rectification temperature be more than preset first temperature threshold when, the synchronous rectification protective device to
Secondary windings sends Thermal protection enabling signal, which is transferred to primary controller, primary side by auxiliary winding
Controller closes the first power tube after receiving the Thermal protection enabling signal；When the temperature detecting unit detects the synchronization
When the temperature of rectification circuit is lower than preset second temperature threshold value, the synchronous rectification protective device sends heat to secondary windings and protects
Shutdown signal is protected, the Thermal protection shutdown signal is transferred to primary controller by auxiliary winding, and primary controller is receiving this
The first power tube is opened after Thermal protection shutdown signal；Realize that the heat of the circuit of synchronous rectification in the utility model embodiment is protected with this
Shield, to reduce the damage of the first power tube.
Those of ordinary skill in the art may be aware that being described in conjunction with embodiment disclosed in an embodiment of the present invention
Each exemplary unit and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.
These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.
Professional technician can use different methods to achieve the described function each specific application, but this realization
It is not considered that exceeding the scope of the utility model.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be wanted with right
Subject to the protection scope asked.
Claims (7)
1. a kind of circuit of synchronous rectification, including transformer, the first power tube, synchronous rectification protective device and primary controller,
Be characterized in that: the synchronous rectification protective device includes temperature detecting unit；
The transformer includes armature winding, secondary windings and auxiliary winding；One end of armature winding connects power supply, armature winding
The other end connect with the drain electrode of the first power tube；Secondary windings is connect with synchronous rectification protective device；Auxiliary winding and primary side
Controller connection；Synchronous rectification protective device and secondary windings with a capacitance connection；Auxiliary winding passes through two divider resistances
It is connect with primary controller；Primary controller is connected with the grid of the first power tube.
2. circuit of synchronous rectification according to claim 1, it is characterised in that: the synchronous rectification protective device further includes
Two power tubes and switch controller, the output end of the temperature detecting unit and one end of switch controller connect, switch control
The other end of device is connect with the second power tube.
3. any one of -2 circuit of synchronous rectification according to claim 1, it is characterised in that: the temperature detecting unit is
The PN junction of diode or triode.
4. a kind of synchronous rectification protective device of for transformer circuit, the transformer circuit include armature winding, it is secondary around
Group, auxiliary winding, the first power tube and primary controller, it is characterised in that:
The synchronous rectification protective device includes temperature detecting unit, the second power tube and switch controller, the temperature detection
The output end of unit and one end of switch controller connect, and the other end of switch controller is connect with the second power tube；
Synchronous rectification protective device and secondary windings with a capacitance connection；Auxiliary winding passes through two divider resistances and primary side control
Device connection processed；Primary controller is connected with the grid of the first power tube.
5. synchronous rectification protective device according to claim 4, it is characterised in that: the temperature detecting unit is diode
Or the PN junction of triode.
6. a kind of charger, which is characterized in that the charger includes synchronous rectification described in any one of claim 1-3
Circuit.
7. a kind of charger, which is characterized in that the charger includes synchronous rectification described in any one of claim 4-5
Protective device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920035863.0U CN209169943U (en) | 2019-01-09 | 2019-01-09 | Circuit of synchronous rectification, synchronous rectification protective device and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920035863.0U CN209169943U (en) | 2019-01-09 | 2019-01-09 | Circuit of synchronous rectification, synchronous rectification protective device and charger |
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| Publication Number | Publication Date |
|---|---|
| CN209169943U true CN209169943U (en) | 2019-07-26 |
Family
ID=67328436
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| CN201920035863.0U Active CN209169943U (en) | 2019-01-09 | 2019-01-09 | Circuit of synchronous rectification, synchronous rectification protective device and charger |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802363A (en) * | 2019-01-09 | 2019-05-24 | 无锡市晶源微电子有限公司 | Circuit of synchronous rectification and guard method, synchronous rectification protective device and charger |
| CN114243638A (en) * | 2021-11-26 | 2022-03-25 | 苏州美思迪赛半导体技术有限公司 | Synchronous rectification over-temperature protection method, system, equipment and storage medium |
| US11774516B2 (en) | 2021-04-30 | 2023-10-03 | Delta Electronics (Shanghai) Co., Ltd. | Detecting method for an operating state of a power supply and a detecting apparatus |
-
2019
- 2019-01-09 CN CN201920035863.0U patent/CN209169943U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802363A (en) * | 2019-01-09 | 2019-05-24 | 无锡市晶源微电子有限公司 | Circuit of synchronous rectification and guard method, synchronous rectification protective device and charger |
| US11774516B2 (en) | 2021-04-30 | 2023-10-03 | Delta Electronics (Shanghai) Co., Ltd. | Detecting method for an operating state of a power supply and a detecting apparatus |
| CN114243638A (en) * | 2021-11-26 | 2022-03-25 | 苏州美思迪赛半导体技术有限公司 | Synchronous rectification over-temperature protection method, system, equipment and storage medium |
| CN114243638B (en) * | 2021-11-26 | 2022-09-27 | 苏州美思迪赛半导体技术有限公司 | Synchronous rectification over-temperature protection method, system, equipment and storage medium |
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Address after: No. 5, Xijin Road, Xinwu District, Wuxi City, Jiangsu Province, 214028 Patentee after: Wuxi Jingyuan Microelectronics Co.,Ltd. Address before: Room 209, building a, block 106-c, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province, 214028 Patentee before: Wuxi Jingyuan Microelectronics Co.,Ltd. |