CN208285217U - Compensation circuit, circuit of power factor correction and Switching Power Supply - Google Patents
Compensation circuit, circuit of power factor correction and Switching Power Supply Download PDFInfo
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- CN208285217U CN208285217U CN201820907410.8U CN201820907410U CN208285217U CN 208285217 U CN208285217 U CN 208285217U CN 201820907410 U CN201820907410 U CN 201820907410U CN 208285217 U CN208285217 U CN 208285217U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to field of power supplies.In order to solve the problems, such as that current pfc circuit metal-oxide-semiconductor type selecting is difficult, at high cost, the utility model embodiment provides a kind of compensation circuit, circuit of power factor correction and Switching Power Supply, wherein, compensation circuit includes voltage input interface, sampling unit, switch unit and compensating unit, and the voltage input interface is connect with the sampling unit；The sampling unit is connect with switch unit, for detecting the input voltage；The switch unit is connect with the compensating unit, and the switch unit is switched on or switched off according to the size of the input voltage；The compensating unit includes compensating end, and the compensating unit is used to compensate the circuit connecting with the compensating end when the switch unit is connected.The utility model reduces the switching frequency under high pressure, realizes more preferably parts selection, can choose the metal-oxide-semiconductor of more small dimension, cost has been greatly reduced.
Description
Technical field
The utility model relates to field of power supplies, in particular to a kind of compensation circuit, circuit of power factor correction and open
Powered-down source.
Background technique
The application belongs to the relevant technologies relevant to the application for the description of background technique, is merely to illustrate and is convenient for reason
Solve present context, should not be construed as applicant be specifically identified to or estimate applicant be considered the application be put forward for the first time apply
The applying date the prior art.
Power factor refers to the relationship between effective power and total power consumption, that is, effective power divided by total power consumption
Ratio.Power factor is the parameter for measuring electrical equipment power consumption efficiency, and low power factor represents low electric power efficiency.In order to mention
The technology of high electrical equipment power factor is known as PFC (Power Factor Correction, PFC).
Flyback, single- stage PFC circuit are in high input voltage at present, Metal-oxide-semicondutor field-effect tube (Metal-
Oxide-Semiconductor Field Effect Transistor, MOSFET, hereinafter referred to as metal-oxide-semiconductor) switching loss is big,
Metal-oxide-semiconductor temperature is caused to increase, metal-oxide-semiconductor type selecting is difficult, at high cost.
Utility model content
In order to solve the problems, such as that current pfc circuit metal-oxide-semiconductor type selecting is difficult, at high cost, the utility model embodiment is provided
A kind of compensation circuit, circuit of power factor correction and Switching Power Supply, reduce the switching frequency under high pressure, realize more preferably device
Part type selecting, the specification of metal-oxide-semiconductor can choose smaller, and cost has been greatly reduced.
In a first aspect, the utility model embodiment provides a kind of compensation circuit, including voltage input interface, sampling list
Member, switch unit and compensating unit, the voltage input interface is connect with the sampling unit, for receiving input voltage；Institute
It states sampling unit to connect with switch unit, for detecting the input voltage, it is single that the input voltage is delivered to the switch
Member；The switch unit is connect with the compensating unit, the switch unit connected according to the size of the input voltage or
It disconnects；The compensating unit includes compensating end, the compensating unit be used for when the switch unit connect when, to the compensation
The circuit of end connection compensates.
It preferably, further include control unit, described control unit includes first end and second end, and the of described control unit
Two ends are connect by the sampling unit with the switch unit；Described control unit is used to when the first end be low level
When, it controls the switch unit and disconnects, and when the first end is high level, described control unit stops working.
Preferably, the switch unit includes metal-oxide-semiconductor Q1；The compensating unit includes capacitor C2；The leakage of the metal-oxide-semiconductor Q1
Pole is connected to one end of the capacitor C2, and the other end of the capacitor C2 is connected to the compensating end；The source electrode of the metal-oxide-semiconductor Q1
Ground connection；In the sampling unit, one end of resistance R1 is connected to the voltage input interface, and the other end of resistance R1 is connected to
One end of resistance R2, the other end of resistance R2 are connected to the grid of one end of capacitor C1, one end of resistance R3 and the metal-oxide-semiconductor Q1
Pole；The other end of the other end of the capacitor C1 and the resistance R3 ground connection.
Preferably, described control unit includes PNP triode Q4, and the emitter of the PNP triode Q4 is connected to described
One end of one end of resistance R1 and the resistance R2, the base stage of the PNP triode Q4 are connected to the first end, the PNP
The grounded collector of triode Q4.
Second aspect, the utility model embodiment provide a kind of circuit of power factor correction, including frequency setting circuit
With compensation circuit described in any of the above embodiments, the compensating end of the compensating end of the frequency setting circuit and the compensation circuit connects
It connects.
Preferably, in the frequency setting circuit, one end of resistance R7 is used to connect with the driving pin of PWM chip,
The other end of the resistance R7 is connected to one end of resistance R8 and the grid of metal-oxide-semiconductor Q3, the other end of the resistance R8 and described
The source electrode of metal-oxide-semiconductor Q3 is grounded, and the drain electrode of the metal-oxide-semiconductor Q3 is connected to one end of resistance R6, the other end connection of the resistance R6
To the compensating end of the frequency setting circuit, one end of capacitor C3, one end of resistance R4 and Schottky diode ZD1 cathode,
The other end of the capacitor C3 is grounded, and the other end of the resistance R4 with the feeder ear of PWM chip for connecting, the Schottky
The anode of diode ZD1 is connected to the grid of one end of capacitor C4, one end of resistance R5 and metal-oxide-semiconductor Q2, and the capacitor C4's is another
The source electrode of one end, the other end of resistance R5 and the metal-oxide-semiconductor Q2 is grounded, and the drain electrode of the metal-oxide-semiconductor Q2 is for zero with PWM chip
The connection of current detecting pin.
The third aspect, the utility model embodiment provide a kind of Switching Power Supply, including power described in any of the above embodiments
Factor correcting circuit.
The utility model embodiment compensation circuit has following technical effect that
The compensation circuit of the utility model embodiment includes switch unit, the switch unit according to the size of input voltage and
It is switched on or switched off, when the size of input voltage, which reaches, connects switch unit, switch unit is connected, and then compensating unit starts
Work, compensates the circuit connecting with compensating end.By the compensation circuit of the utility model embodiment and power factor school
After positive circuit connection, compensating unit can compensate the frequency of circuit of power factor correction, such PFC electricity
The specification of the metal-oxide-semiconductor on road has more more options, can choose the metal-oxide-semiconductor of more small dimension, significantly reduces cost.
Detailed description of the invention
Fig. 1 is the schematic illustration of the utility model embodiment compensation circuit；
Fig. 2 is the schematic illustration of one preferred embodiment of the utility model embodiment compensation circuit；
Fig. 3 is the physical circuit schematic diagram of the utility model embodiment compensation circuit；
Fig. 4 is the physical circuit schematic diagram of one preferred embodiment of the utility model embodiment compensation circuit；
Fig. 5 is the physical circuit schematic diagram of the utility model embodiment circuit of power factor correction；
Fig. 6 is the circuit diagram of one preferred embodiment of the utility model embodiment circuit of power factor correction.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model embodiment, below with reference to attached
The utility model embodiment is further described in detail in figure and specific embodiment.It should be noted that not conflicting
In the case where, the feature in embodiments herein and embodiment can be combined with each other.
Many details are explained in the following description in order to fully understand the utility model embodiment, still,
The utility model embodiment can also be implemented using other than the one described here other modes, therefore, the utility model
The protection scope of embodiment is not limited by the specific embodiments disclosed below.
Following the discussion provides multiple embodiments of the utility model.Although each embodiment represents the list of utility model
One combination, but the utility model difference embodiment can replace, or merge combination, therefore the utility model embodiment can also
Think all possible combinations comprising documented identical and/or different embodiments.Thus, if one embodiment include A, B,
C, another embodiment includes the combination of B and D, then the utility model embodiment also should be regarded as including one containing A, B, C, D
A or multiple every other possible combined embodiments, although the embodiment may not have specific text in the following contents
Word is recorded.
The utility model embodiment provides a kind of compensation circuit, including voltage input interface, sampling unit, switch unit
And compensating unit, voltage input interface is connect with sampling unit, for receiving input voltage；Sampling unit and switch unit connect
It connects, for detecting input voltage, input voltage is delivered to switch unit；Switch unit is connect with compensating unit, switch unit
It is switched on or switched off according to the size of input voltage；Compensating unit includes compensating end, for when switch unit connect when, to benefit
The circuit for repaying end connection compensates.
The compensation circuit of the utility model embodiment includes switch unit, the switch unit according to the size of input voltage and
It is switched on or switched off, when the size of input voltage, which reaches, connects switch unit, switch unit is connected, and then compensating unit starts
Work, compensates the circuit connecting with compensating end.By the compensation circuit of the utility model embodiment and power factor school
After positive circuit connection, compensating unit can compensate the frequency of circuit of power factor correction, such PFC electricity
The specification of the metal-oxide-semiconductor on road has more more options, can choose the metal-oxide-semiconductor of more small dimension, significantly reduces cost.
Fig. 1 is the schematic illustration of the utility model embodiment compensation circuit, as shown in Figure 1, the present embodiment compensation circuit
Including voltage input interface 11, sampling unit 12, switch unit 13 and compensating unit 14, voltage input interface 11 and sampling unit
12 connections, for receiving input voltage, such as reception high pressure.Sampling unit 12 is connect with switch unit 13, for detecting input
Input voltage is delivered to switch unit by voltage, and in one embodiment, it is high pressure that sampling unit 12, which for example detects input voltage,
Or low pressure.Switch unit 13 is connect with compensating unit 14, and switch unit 13 is switched on or switched off according to the size of input voltage；
In one embodiment, when input voltage is high pressure, switch unit 13 is connected.Compensating unit 14 includes compensating end 141, compensation
Unit 14 is used to compensate the circuit connecting with compensating end 141 when switch unit 13 is connected.
Fig. 2 is the schematic illustration of one preferred embodiment of the utility model embodiment compensation circuit, as shown in Fig. 2, one
In a embodiment, compensation circuit further includes control unit 15, and control unit 15 includes first end 151 and second end 152, and control is single
The second end 152 of member 15 is connect by sampling unit 12 with switch unit 13.Control unit 15 is used to when first end 151 be low electricity
Usually, control switch unit 13 disconnects, and when first end 151 is high level, control unit 15 stops working.Implement at one
In example, high level can be 1, and low level can be 0.
Fig. 3 is the physical circuit schematic diagram of the utility model embodiment compensation circuit, as shown in figure 3, in one embodiment
In, the switch unit 13 of compensation circuit includes metal-oxide-semiconductor Q1；Compensating unit 14 includes capacitor C2；Wherein, the drain electrode of metal-oxide-semiconductor Q1 connects
It is connected to one end of capacitor C2, the other end of capacitor C2 is connected to compensating end；The source electrode of metal-oxide-semiconductor Q1 is grounded.In sampling unit 12,
One end of resistance R1 is connected to voltage input interface, and the other end of resistance R1 is connected to one end of resistance R2, and resistance R2's is another
End is connected to the grid of one end of capacitor C1, one end of resistance R3 and metal-oxide-semiconductor Q1；The other end of capacitor C1 and resistance R3's is another
End ground connection.
Fig. 4 is the physical circuit schematic diagram of one preferred embodiment of the utility model embodiment compensation circuit, as shown in figure 4,
In one embodiment, compensation circuit further includes control unit, which includes PNP triode Q4, PNP triode Q4's
Emitter is connected to one end of resistance R1 and one end of resistance R2, and the base stage of PNP triode Q4 is connected to first end, tri- pole PNP
The grounded collector of pipe Q4.In one embodiment, first end receives logic level.
The utility model embodiment additionally provides a kind of circuit of power factor correction, including frequency setting circuit and above-mentioned
One compensation circuit, the compensating end of the compensation circuit and the compensating end of frequency setting circuit connect, to frequency setting circuit
It compensates.
Fig. 5 is the physical circuit schematic diagram of the utility model embodiment circuit of power factor correction, as shown in figure 5, one
In a embodiment, circuit of power factor correction includes compensation circuit and frequency setting circuit, the compensating end of frequency setting circuit
The connection of the compensating end of TOFF and compensation circuit, the structure of compensation circuit refer to the embodiment of above-mentioned compensation circuit, frequency setting
The structure of circuit is as follows: one end of resistance R7 is used for and PWM (Pulse Width Modulation, pulse width modulation) chip
The connection of driving pin, that is to say, that for connecting with the driving pin of PWM chip, the other end of resistance R7 is connected at the end GD
One end of resistance R8 and the grid of metal-oxide-semiconductor Q3, the other end of resistance R8 and the source electrode ground connection of metal-oxide-semiconductor Q3, the drain electrode of metal-oxide-semiconductor Q3 connect
It is connected to one end of resistance R6, the other end of resistance R6 is connected to the compensating end of frequency setting circuit, one end of capacitor C3, resistance R4
One end and Schottky diode ZD1 cathode, capacitor C3 the other end ground connection, the other end of resistance R4 is used for and PWM chip
Feeder ear connection, that is to say, that the end VCC with the feeder ear of PWM chip for connect, the anode company of Schottky diode ZD1
Be connected to the grid of one end of capacitor C4, one end of resistance R5 and metal-oxide-semiconductor Q2, the other end of capacitor C4, the other end of resistance R5 and
The source electrode of metal-oxide-semiconductor Q2 is grounded, and zero current detection pin of the drain electrode of metal-oxide-semiconductor Q2 for PWM chip is connect, that is to say, that ZCD
End is connect for the zero current detection pin with PWM chip.
As shown in figure 5, the working principle of frequency setting circuit is as follows: GD connects the driving pin of PWM chip, and VCC connects PWM core
The feeder ear of piece, ZCD connect the ZCD pin of PWM chip, according to the working principle of single- stage PFC circuit, when GD exports high level,
Metal-oxide-semiconductor Q3 conducting, TOFF voltage is pulled low at this time, and metal-oxide-semiconductor Q2 does not work, and ZCD is not influenced by this circuit, due to resistance R4 resistance value
Very big, VCC will not be pulled low, and chip can work on；When GD exports low level, VCC fills capacitor C3 by resistance R4
Electricity, voltage are begun to ramp up from 0, when TOFF voltage is greater than the clamp voltage of Schottky diode ZD1, metal-oxide-semiconductor Q2 conducting, at this time
ZCD is pulled low, and detects that rear GD starts output driving level by chip.This circuit can pass through Schottky diode ZD1, resistance
R4, capacitor C3 parameter setting hold time to adjust the low level of GD, before Schottky diode ZD1 is breakdown, GD can be with
Low level is kept, after Schottky diode ZD1 is breakdown, GD becomes high level, so as to realize to the accurate of switching frequency
Control.
Inventors have found that there is a common characteristics for the topological structures such as flyback, single- stage PFC at present: being led in on-fixed
Under the mode of logical time, under identical loading condition, turn-on time increases with the reduction of input voltage, generally, just like
Lower formula:
Since turn-on time and input voltage are inversely proportional, so that frequency is lower (turn-on time is long) when inputting low pressure, it is high
Frequency is higher instead when pressure.Peak primary currents are big when will lead to low pressure input in this way, and magnetic core is easily saturated, transformer temperature liter
Height, design of transformer are difficult；And when high input voltage, metal-oxide-semiconductor switching loss is big, and metal-oxide-semiconductor temperature is caused to increase, and metal-oxide-semiconductor type selecting is tired
Difficulty, it is at high cost.
As shown in figure 5, sampling unit 12 detects the electricity of voltage input interface after frequency setting circuit is connect with compensation circuit
Pressure, when input voltage is high pressure, metal-oxide-semiconductor Q1 conducting, capacitor C2 is in parallel with capacitor C3, and frequency setting circuit needs longer at this time
Charging time could ZD1 be punctured, that is to say, that the time, T was elongated, to reduce switching frequency f；When inputting low pressure,
Metal-oxide-semiconductor Q1 is not turned on, and capacitor C2 does not access circuit, and switching frequency is unrelated with compensation circuit.Wherein, the size and metal-oxide-semiconductor of high pressure
The conducting voltage of Q1 is related.In conclusion reducing frequency by the compensation circuit of the utility model embodiment when inputting high pressure
The switching frequency f of rate initialization circuit, realizes more preferably parts selection, can choose the transformer core size of more small dimension,
Also the metal-oxide-semiconductor that can choose more small dimension, has been greatly reduced cost.
Fig. 6 is the circuit diagram of one preferred embodiment of the utility model embodiment circuit of power factor correction, such as Fig. 6 institute
Show, in one embodiment, compensation circuit further includes control unit, which includes PNP triode Q4, PNP triode
The emitter of Q4 is connected to one end of resistance R1 and one end of resistance R2, and the base stage of PNP triode Q4 is connected to first end, PNP
The grounded collector of triode Q4.When compensation circuit does not have PNP triode Q4, compensation circuit is at circuit of power factor correction
It can also work when standby mode, increase so as to cause stand-by power consumption or even circuit working state is abnormal.As shown in fig. 6, compensation
Circuit includes PNP triode Q4, and in this way when circuit of power factor correction is in standby, first end is low level, MOS
The grid of pipe Q1 is pulled to low level, and metal-oxide-semiconductor Q1 is not turned on, and compensation circuit does not work；After load output, first end is high electricity
Flat, PNP triode Q4 is not turned on, so that compensation circuit works normally.That is, being in standby in circuit of power factor correction
When state, control unit control compensation circuit does not work, to reduce power consumption, avoids compensation circuit to standby working condition
It has an impact, guarantees low standby power loss.
The utility model embodiment additionally provides a kind of Switching Power Supply, the PFC electricity including any of the above-described
Road.Above-mentioned line voltage frequency compensated circuit embodiment and circuit of power factor correction embodiment are please referred to about Switching Power Supply.
In the present invention, term " first ", " second ", "left", "right" are only used for the purpose of description, and cannot understand
For indication or suggestion relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term
The terms such as " installation ", " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection,
It can be and be detachably connected, or be integrally connected；" connected " can be directly connected, and can also pass through the indirect phase of intermediary
Even.For the ordinary skill in the art, it can understand that above-mentioned term is implemented in the utility model as the case may be
Concrete meaning in example.
In the description of the utility model embodiment, it is to be understood that the orientation or position of the instructions such as term " on ", "lower"
Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model embodiment and simplification is retouched
It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation,
It is thus impossible to be interpreted as the limitation to the utility model embodiment.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least the one of the utility model
In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment
Or example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more embodiment or examples
In can be combined in any suitable manner.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model embodiment,
For those skilled in the art, the utility model embodiment can have various modifications and variations.It is all in the utility model
Within the spirit and principle of embodiment, any modification, equivalent replacement, improvement and so on should be included in the utility model
Within protection scope.
Claims (7)
1. a kind of compensation circuit, which is characterized in that including voltage input interface, sampling unit, switch unit and compensating unit, institute
It states voltage input interface to connect with the sampling unit, for receiving input voltage；The sampling unit is connect with switch unit,
For detecting the input voltage, the input voltage is delivered to the switch unit；The switch unit and the compensation
Unit connection, the switch unit are switched on or switched off according to the size of the input voltage；The compensating unit includes compensation
End, the compensating unit are used to compensate the circuit connecting with the compensating end when the switch unit is connected.
2. compensation circuit according to claim 1, which is characterized in that further include control unit, described control unit includes
The second end of first end and second end, described control unit is connect by the sampling unit with the switch unit；The control
Unit processed is used to control the switch unit when the first end is low level and disconnect, and when the first end is high level
When, described control unit stops working.
3. compensation circuit according to claim 2, which is characterized in that the switch unit includes metal-oxide-semiconductor Q1；The compensation
Unit includes capacitor C2；The drain electrode of the metal-oxide-semiconductor Q1 is connected to one end of the capacitor C2, the other end connection of the capacitor C2
To the compensating end；The source electrode of the metal-oxide-semiconductor Q1 is grounded；
In the sampling unit, one end of resistance R1 is connected to the voltage input interface, and the other end of resistance R1 is connected to
One end of resistance R2, the other end of resistance R2 are connected to the grid of one end of capacitor C1, one end of resistance R3 and the metal-oxide-semiconductor Q1
Pole；The other end of the other end of the capacitor C1 and the resistance R3 ground connection.
4. compensation circuit according to claim 3, which is characterized in that described control unit includes PNP triode Q4, described
The emitter of PNP triode Q4 is connected to one end of the resistance R1 and one end of the resistance R2, the PNP triode Q4's
Base stage is connected to the first end, the grounded collector of the PNP triode Q4.
5. a kind of circuit of power factor correction, which is characterized in that including any one of frequency setting circuit and claim 1-4 institute
The compensation circuit stated, the compensating end of the frequency setting circuit are connect with the compensating end of the compensation circuit.
6. circuit of power factor correction according to claim 5, which is characterized in that in the frequency setting circuit, electricity
One end of resistance R7 for connect with the driving pin of PWM chip, the other end of the resistance R7 be connected to one end of resistance R8 with
The source electrode of the grid of metal-oxide-semiconductor Q3, the other end of the resistance R8 and the metal-oxide-semiconductor Q3 are grounded, the drain electrode connection of the metal-oxide-semiconductor Q3
To one end of resistance R6, the other end of the resistance R6 be connected to the compensating end of the frequency setting circuit, capacitor C3 one end,
One end of resistance R4 and the cathode of Schottky diode ZD1, the other end ground connection of the capacitor C3, the other end of the resistance R4
It is connect for the feeder ear with PWM chip, the anode of the Schottky diode ZD1 is connected to one end of capacitor C4, resistance R5
One end and metal-oxide-semiconductor Q2 grid, the source electrode of the other end of the capacitor C4, the other end of resistance R5 and the metal-oxide-semiconductor Q2 connects
Ground, zero current detection pin of the drain electrode of the metal-oxide-semiconductor Q2 for PWM chip are connect.
7. a kind of Switching Power Supply, which is characterized in that including circuit of power factor correction described in any one of claim 5-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820907410.8U CN208285217U (en) | 2018-06-12 | 2018-06-12 | Compensation circuit, circuit of power factor correction and Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820907410.8U CN208285217U (en) | 2018-06-12 | 2018-06-12 | Compensation circuit, circuit of power factor correction and Switching Power Supply |
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| CN208285217U true CN208285217U (en) | 2018-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019172A (en) * | 2020-09-03 | 2020-12-01 | 厦门市三安集成电路有限公司 | Gate drive circuit of gallium nitride device |
-
2018
- 2018-06-12 CN CN201820907410.8U patent/CN208285217U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019172A (en) * | 2020-09-03 | 2020-12-01 | 厦门市三安集成电路有限公司 | Gate drive circuit of gallium nitride device |
| CN112019172B (en) * | 2020-09-03 | 2023-08-08 | 厦门市三安集成电路有限公司 | Grid driving circuit of gallium nitride device |
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Effective date of registration: 20190513 Address after: 510000 3/F 310, 192 Kezhu Road, Guangzhou High-tech Industrial Development Zone, Guangdong Province (office use only) Patentee after: Guangzhou Kun Electronic Technology Co. Ltd. Address before: 510530 No. 6, Yun Po four road, Whampoa District, Guangzhou, Guangdong. Patentee before: Guangzhou CVT Electronics Technology Co., Ltd. |