CN207427513U - A kind of adaptive New LED driver - Google Patents
A kind of adaptive New LED driver Download PDFInfo
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- CN207427513U CN207427513U CN201721158920.1U CN201721158920U CN207427513U CN 207427513 U CN207427513 U CN 207427513U CN 201721158920 U CN201721158920 U CN 201721158920U CN 207427513 U CN207427513 U CN 207427513U
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a kind of adaptive New LED drivers,It includes input over-current protecting unit,Rectification filtering unit,Voltage detection unit,Current detecting unit,Processor of single chip computer unit and driving unit,Electric current is by input over-current protecting unit and rectification filtering unit,To export high-voltage direct current in circuit,High-voltage direct current is detected via voltage detection unit and current detecting unit,And the voltage and current amount detected is converted into analog signal,And it is sent to processor of single chip computer unit and carries out calculation process,Driving unit is controlled by the variable PWM waveform of processor of single chip computer unit output duty cycle,The driving circuit of driving unit passes through driving chip,Large power triode or field-effect tube control LED light bar to load,Closed loop control process is carried out to the LED light bar load of different capacity so as to fulfill one,Automatic adjusument is carried out to be loaded to the LED light bar of different capacity size,It is efficiently,It is energy saving,Environmental protection,Suitable for marketing application.
Description
Technical field
The utility model is related to a kind of LED driver, it particularly relates to a kind of adaptive New LED driver.
Background technology
At present, the LED driver of the prior art is broadly divided into constant pressure type driver, constant current mode driver and arteries and veins by function
Rush three kinds of formula driver.Wherein：Constant pressure type driver is generally exactly that our common DC/DC step-up drivers are in the majority, advantage
It is chip cost cheaply without complicated peripheral circuit, but defect is can only to drive LED that will be easy to cause drive with constant voltage
Circuital current is uncontrollable during dynamic output, can not ensure the uniformity of multiple LED luminances；Constant current mode driver overcomes constant pressure type
The uncontrollable problem of electric current of driver driving, but constant current chip relatively good at present can accomplish 1% or so constant current accuracy,
And have easy peripheral control interface that the size of current of required output can be flexibly set so being favourably welcome, but constant current mode is driven
The constant current chip price of dynamic device is more expensive than constant pressure chip price and peripheral circuit is relative complex, simultaneously as constant output current institute
It can be than very fast as electric discharge when power supply in battery using entire chip；Pulsed drive device is with high-frequency pulse generation
Device output interface is powered to LED light, since it is so that human eye can not feel LED at all by the very high pulse signal of frequency
Stroboscopic, therefore pulsed drive device has met vision needs and has been effectively saved electric energy output on the one hand, and this type
The working frequency of chip can generally be controlled by external interface, but effective oscillation frequency of the driving chip of pulsed drive device at present
Rate is generally confined to 100KHz~500KHz scopes, and the pulsed drive device driving force of the prior art is caused only to be suitable only for small work(
The application of rate LED, and the lamp bar load progress for reaching different capacity by series-parallel mode by several LED light bars cannot be directed to
One complete closed loop control process carries out automatic adjusument so as to be not achieved to load LED light bar.In addition, the prior art
LED driver also there are some defects：1) mobility scale of the adaptable supply voltage of its circuit and electric current can usually be caused
It is very narrow, be off slightly from may can not light LED either luminous efficiency seriously reduce or shorten the working life even burn
Ruin chip；2) transfer efficiency of traditional LED driver is relatively low, especially when driving great power LED load due to non-conduct
The power of light output all dissipates as heat, and the transfer efficiency for causing power supply electric energy is seriously relatively low, so as to affect the energy saving effects of LED
The performance of fruit affects it and promotes in the market to a certain extent.
Therefore, it is badly in need of designing a kind of adaptive New LED driver, detects LED light bar immediately using LED driver and bear
The Current Voltage situation of load, and the Current Voltage for detecting LED light bar load is converted into control signal, for by several LED light
The lamp bar load that item reaches different capacity by series-parallel mode carries out automatic adjusument and control, to adapt to different LED light
The lamp bar that item reaches different capacity by series-parallel mode loads, and to improve the driving effect of LED driver, extends LED and drives
The service life of dynamic device, and the transfer efficiency of LED driver is effectively improved to ensure that there is drive circuit higher output to imitate
Rate.
Utility model content
For above deficiency, the utility model provide it is a kind of detected immediately using LED driver LED light bar load
Current Voltage situation, and the Current Voltage for detecting LED light bar load is converted into control signal, lead to for by several LED light bars
Lamp bar load progress automatic adjusument and control that series-parallel mode reaches different capacity are crossed, is led to adapting to different LED light bars
The lamp bar load that series-parallel mode reaches different capacity is crossed, to improve the driving effect of LED driver, extends LED driver
Service life, and effectively improve the transfer efficiency of LED driver to ensure that drive circuit has higher delivery efficiency
Adaptive New LED driver, it includes input over-current protecting unit, rectification filtering unit, voltage detection unit, electric current inspection
Unit, processor of single chip computer unit and driving unit are surveyed, the input over-current protecting unit is electrically connected rectification filtering unit, institute
The one end for stating voltage detection unit and the current detecting unit is electrically connected with the rectification filtering unit, the voltage inspection
The other end for surveying unit and the current detecting unit is electrically connected with the processor of single chip computer unit, at the microcontroller
It manages device unit to be electrically connected with the driving unit, the driving unit is electrically connected with LED light bar load；
The over-current protecting unit plays a protective role to circuit overcurrent for the high current in absorbing circuit, the mistake
Stream protection location is made of fuse and TVS pipe；
The rectification filtering unit is used to carry out ac-dc conversion and capacitor filtering to the electric current in circuit, by alternation
Electric current becomes steady DC current；The rectification filtering unit is made of four rectifier diodes, capacitance C1 and capacitance C2
Bridge rectifier, the pin 2 and pin 3 of the bridge rectifier pass through over-current protecting unit and the firewire of AC power
L and zero curve N are electrically connected, be electrically connected after the capacitance C1 and capacitance C2 parallel connections bridge rectifier pin 1 and pin 4 it
Between；
The voltage detection unit is used to the LED light bar load voltage detected being converted into low and high level signal or mould
Intend signal, the control signal of microcontroller input port is met with output；The voltage detection unit is by voltage sample resistance and voltage
Detection chip forms, and the voltage sample resistance is electrically connected with the pin 1 and pin 4 for connecing bridge rectifier, and the electricity
Sampling resistor and the IN ports of the voltage checking chip is pressed to be electrically connected, the GND ports of the voltage checking chip and bridge-type
The pin 4 of rectification circuit is electrically connected, and the OUT terminal mouth of the voltage checking chip electrically connects with the processor of single chip computer unit
It connects；
The current detecting unit is used for the current transformation that the LED light bar detected loads into analog signal, with output
Meet the control signal of microcontroller reception；The current detecting unit is made of current sampling resistor R3, current sampling resistor R3
It is electrically connected between the pin 4 of bridge rectifier and driving unit, and current sampling resistor R3 and processor of single chip computer list
Member is electrically connected；
The processor of single chip computer unit is used to export the control signal for variable duty ratio to drive the drive of driving unit
Dynamic circuit, the processor of single chip computer unit are made of microcontroller and resistance R4, and the microcontroller is electrically connected at voltage detecting
The OUT terminal mouth of chip, the microcontroller are electrically connected with current sampling resistor R3, and the microcontroller passes through resistance R4 and the drive
Moving cell is electrically connected；
The driving unit is used to control and adjust the load current of LED light bar load.
In order to further realize the present invention, the rectifier diode includes the diode D1, the diode that are sequentially connected in series
D2, diode D3 and diode D4.
In order to further realize the present invention, the voltage sample resistance includes the resistance R1 being connected in series and resistance R2, electricity
Resistance R1, one end of resistance R2 are electrically connected respectively with the pin 1 and pin 4 for connecing bridge rectifier, resistance R1, resistance R2 it is another
One end is electrically connected with the IN ports of voltage checking chip, the GND ports of voltage checking chip and drawing for bridge rectifier
Foot 4 is electrically connected, and OUT terminal mouth and the processor of single chip computer unit of voltage checking chip are electrically connected.
In order to further realize the present invention, the driving unit is by driving chip, large power triode or field-effect tube group
Into.
In order to further realize the present invention, the LED light bar load is made up of several LED light bars series-parallel mode
The lamp bar load of different capacity.
The beneficial effects of the utility model：
1st, a kind of adaptive New LED driver of the utility model, electric current is by input over-current protecting unit and whole
Filter unit is flowed, to export high-voltage direct current in circuit, high-voltage direct current is via voltage detection unit and current detecting
Unit is detected, and the voltage and current amount detected is converted into simulation letter by voltage detection unit and current detecting unit respectively
Number, and the microcontroller for being sent to processor of single chip computer unit carries out calculation process, passes through single-chip microcomputer output mouth output duty cycle
Variable PWM waveform controls the driving circuit of driving unit, and the driving circuit of driving unit passes through driving chip, high-power three
Pole pipe or field-effect tube control LED light bar to load, so that reaching different work(by series-parallel mode by several LED light bars
The lamp bar load of rate, so as to fulfill a complete closed loop control process, reaches to passing through series-parallel side by several LED light bars
Formula achievees the purpose that the lamp bar load of different capacity carries out automatic adjusument, i.e. the adaptive New LED driver is a kind of
Adaptive New LED driver, its main feature is that driver can Auto-Sensing to the situation of LED load, and pass through itself
Voltage detection unit, current detecting unit and microcontroller carry out automatic adjusument and control, different LED light bars to be suitble to load.
2nd, a kind of adaptive New LED driver of the utility model, the utility model it is a kind of adaptive new
LED driver, compared with the prior art, its main feature is that driver can detect the situation of LED light bar load immediately, by certainly
The microcontroller of the voltage detection unit of body, current detecting unit and processor of single chip computer unit carries out adaptive adjusting and control
System, to reach to carrying out automatic adjusument by lamp bar load of several LED light bars by reaching different capacity in a manner of series-parallel
Purpose, have voluntarily adjusted in the range of wider Current Voltage, with adapt to different LED light bars pass through it is series-parallel
Mode reaches the lamp bar load of different capacity, overcomes existing LED driver that can usually cause the adaptable supply voltage of its circuit
Very narrow with the mobility scale of electric current, LED may can not be lighted either luminous efficiency is seriously reduced or contracted by being off slightly from
Short service life even burns the defects of chip, big by reaching different capacity in a manner of series-parallel to adapt to different LED light bars
Small lamp bar load, to improve the driving effect of LED driver, extends the service life of LED driver, suitable for big on the market
Scope is promoted.
3rd, a kind of adaptive New LED driver of the utility model, uses microcontroller sample rate current voltage, PWM
Output is electric to adjust LED light bar load current, and circuit input is directly inputted using alternating current, and no isolation, delivery efficiency is high, is solved
The transfer efficiency of traditional LED driver is relatively low, especially when driving great power LED load due to not as light output
Power all dissipates as heat, and the transfer efficiency for causing power supply electric energy is seriously relatively low, so as to affect the performance of LED energy-saving effects
The technical issues of, the transfer efficiency of LED driver is effectively improved to ensure that drive circuit has higher delivery efficiency, is met
Efficiently, the requirement of energy-saving and environmental protection.
Description of the drawings
Fig. 1 is the logical framework flow chart of the utility model；
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
The utility model is further elaborated below in conjunction with the accompanying drawings, wherein, the direction of the utility model is using Fig. 1 as mark
It is accurate.
As shown in Fig. 1 to 2 figures, a kind of adaptive New LED driver of the utility model, it includes input overcurrent and protects
It protects unit 10, rectification filtering unit 20, voltage detection unit 30, current detecting unit 40, processor of single chip computer unit 50 and drives
Moving cell 60, wherein, input over-current protecting unit 10 is electrically connected rectification filtering unit 20, voltage detection unit 30 and electric current inspection
The one end for surveying unit 40 is electrically connected with rectification filtering unit 20, voltage detection unit 30 and current detecting unit 40 it is another
End is electrically connected with processor of single chip computer unit 50, and processor of single chip computer unit 50 is electrically connected with driving unit 60, driving
Unit 60 is electrically connected with LED light bar load 70.
Over-current protecting unit 10 is used for the high current in absorbing circuit, prevents major loop short circuit either due to lightning stroke or big
The reasons such as the start-stop of power electrical equipment cause main circuit current excessive, and are easy to cause input power and are present with surge current
Phenomenon and electrical equipment is caused to burn damage.Over-current protecting unit 10 is made of fuse and TVS pipe, mainly in circuit
High current is absorbed and protects the safety of electrical equipment.
Rectification filtering unit 20 is used to carry out ac-dc conversion and capacitor filtering to the electric current in circuit, by alternation electricity
Stream becomes steady DC current.Rectification filtering unit 20 is made of four silicon rectifier diodes, capacitance C1 and capacitance C2
Bridge rectifier, four silicon rectifier diodes include the diode D1, diode D2, the diode D3 and two that are sequentially connected in series
Pole pipe D4, the pin 2 and pin 3 of bridge rectifier pass through over-current protecting unit 10 and the firewire L and zero curve N of AC power electricity
Property connection, be electrically connected after capacitance C1 and capacitance C2 parallel connections between the pin 1 of bridge rectifier and pin 4.
Voltage detection unit 30 is used to the voltage signal detected being converted into low and high level signal or analog signal, with
Output meets the control signal of microcontroller input port reception.Voltage detection unit 30 is by voltage sample resistance and voltage checking chip
Composition, voltage sample resistance include the resistance R1 being connected in series and resistance R2, resistance R1, one end of resistance R2 respectively with connecing bridge-type
The pin 1 and pin 4 of rectification circuit are electrically connected, the IN ports of resistance R1, the other end of resistance R2 with voltage checking chip
It is electrically connected, the GND ports of voltage checking chip and the pin 4 of bridge rectifier are electrically connected, the OUT of voltage checking chip
Port is electrically connected with processor of single chip computer unit 50.
Current detecting unit 40 is used for the current transformation that will be detected into analog signal, meets microcontroller input port with output
The control signal of reception.Current detecting unit 40 is mainly made of current sampling resistor R3, and sampling resistor R3 is electrically connected at bridge
Between the pin 4 of formula rectification circuit and driving unit 60, sampling resistor R3 is electrically connected with processor of single chip computer unit 50.
Processor of single chip computer unit 50 is used to export the control signal for variable duty ratio to drive the drive of driving unit 60
Dynamic circuit, processor of single chip computer unit 50 are mainly made of the microcontroller and resistance R4 that carry A/D inputs, and microcontroller is electrically connected
In the OUT terminal mouth of voltage checking chip, microcontroller is electrically connected with sampling resistor R3, and microcontroller passes through resistance R4 and driving unit
60 are electrically connected.
Driving unit 60 is used to control to adjust the load current of LED light bar load 70, and driving unit 60 is mainly by driving core
Piece, large power triode or field-effect tube composition.
The lamp bar that LED light bar load 70 is mainly made up of different capacity several LED light bars series-parallel mode is born
It carries.
A kind of basic functional principle of the adaptive New LED driver of the utility model：As shown in Figure 1, by this reality
Power grid is accessed with new adaptive New LED driver, electric current is by input over-current protecting unit 10 and rectifying and wave-filtering list
Member 20, to export high-voltage direct current in circuit, high-voltage direct current is via voltage detection unit 30 and current detecting unit
40 are detected, and the voltage and current amount detected is converted into simulating by voltage detection unit 30 and current detecting unit 40 respectively
Signal, and the microcontroller for being sent to processor of single chip computer unit 50 carries out calculation process, is accounted for by the output of single-chip microcomputer output mouth
Sky controls the driving circuit of driving unit 60 than variable PWM waveform, the driving circuit of driving unit 60 by driving chip,
Large power triode or field-effect tube control the LED light bar to load 70, so that passing through series-parallel mode by several LED light bars
Reach the lamp bar load of different capacity, so as to fulfill a complete closed loop control process, reach to being passed through by several LED light bars
Series-parallel mode achievees the purpose that the lamp bar load of different capacity carries out automatic adjusument.
A kind of adaptive New LED driver of the utility model, compared with the prior art, its main feature is that driver energy
Enough situations for detecting LED light bar load immediately, pass through itself voltage detection unit 30, current detecting unit 40 and monolithic
The microcontroller of machine processor unit 50 carries out adaptive adjusting and control, to reach to passing through connection in series-parallel by several LED light bars
Mode achieve the purpose that different capacity lamp bar load carry out automatic adjusument, have in the range of wider Current Voltage
It is voluntarily adjusted, is loaded by adapting to different LED light bars by reaching the lamp bar of different capacity in a manner of series-parallel.In addition, its
LED light bar load current electricity is adjusted using microcontroller sample rate current voltage, PWM outputs, circuit input is using mains
Electricity directly inputs, no isolation, and delivery efficiency is high.
The foregoing is merely the better embodiments of the present invention, and the invention is not limited in the above embodiments, are implementing
In the process there may be local small structural modification, if the various changes or modifications of the present invention are not departed from the essence of the present invention
God and scope, and belong within the scope of the claim and equivalent technologies of the present invention, then the present invention is also intended to comprising these changes
And modification.
Claims (5)
1. a kind of adaptive New LED driver, it is characterised in that：It includes input over-current protecting unit, rectifying and wave-filtering list
Member, voltage detection unit, current detecting unit, processor of single chip computer unit and driving unit, the input over-current protecting unit
Be electrically connected rectification filtering unit, one end of the voltage detection unit and the current detecting unit with the rectifying and wave-filtering
Unit is electrically connected, the other end of the voltage detection unit and the current detecting unit with the processor of single chip computer list
Member is electrically connected, and the processor of single chip computer unit is electrically connected with the driving unit, and the driving unit is born with LED light bar
It carries and is electrically connected；
The over-current protecting unit plays a protective role to circuit overcurrent for the high current in absorbing circuit, and the overcurrent is protected
Shield unit is made of fuse and TVS pipe；
The rectification filtering unit is used to carry out ac-dc conversion and capacitor filtering to the electric current in circuit, by alternating current
Become steady DC current；The bridge that the rectification filtering unit is made of four rectifier diodes, capacitance C1 and capacitance C2
Formula rectification circuit, the pin 2 and pin 3 of the bridge rectifier by the firewire L of over-current protecting unit and AC power and
Zero curve N is electrically connected, and is electrically connected after the capacitance C1 and capacitance C2 parallel connections between the pin 1 of bridge rectifier and pin 4；
The voltage detection unit is used to the LED light bar load voltage detected being converted into low and high level signal or simulation is believed
Number, to export the control signal for meeting microcontroller input port；The voltage detection unit is by voltage sample resistance and voltage detecting
Chip forms, and the voltage sample resistance is electrically connected with the pin 1 and pin 4 for connecing bridge rectifier, and the voltage is adopted
Sample resistance and the IN ports of the voltage checking chip are electrically connected, the GND ports of the voltage checking chip and bridge rectifier
The pin 4 of circuit is electrically connected, and the OUT terminal mouth of the voltage checking chip is electrically connected with the processor of single chip computer unit；
The current detecting unit is used into analog signal meet the current transformation that the LED light bar detected loads with output
The control signal that microcontroller receives；The current detecting unit is made of current sampling resistor R3, and current sampling resistor R3 is electrical
It is connected between the pin 4 of bridge rectifier and driving unit, and current sampling resistor R3 and processor of single chip computer unit electricity
Property connection；
The processor of single chip computer unit is used to export the control signal for variable duty ratio to drive the driving of driving unit electric
Road, the processor of single chip computer unit are made of microcontroller and resistance R4, and the microcontroller is electrically connected at voltage checking chip
OUT terminal mouth, the microcontroller and current sampling resistor R3 be electrically connected, and the microcontroller passes through resistance R4 and the driving is single
Member is electrically connected；
The driving unit is used to control and adjust the load current of LED light bar load.
2. adaptive New LED driver according to claim 1, it is characterised in that：The rectifier diode includes
Diode D1, diode D2, diode D3 and the diode D4 being sequentially connected in series.
3. adaptive New LED driver according to claim 1, it is characterised in that：The voltage sample resistance bag
The resistance R1 being connected in series and resistance R2 is included, resistance R1, one end of resistance R2 are respectively with connecing the pin 1 of bridge rectifier and drawing
Foot 4 is electrically connected, and resistance R1, the other end of resistance R2 are electrically connected with the IN ports of voltage checking chip, voltage detecting core
The GND ports of piece and the pin 4 of bridge rectifier are electrically connected, the OUT terminal mouth and processor of single chip computer of voltage checking chip
Unit is electrically connected.
4. adaptive New LED driver according to claim 1, it is characterised in that：The driving unit is by driving
Chip, large power triode or field-effect tube composition.
5. adaptive New LED driver according to claim 1, it is characterised in that：If LED light bar load by
The lamp bar that dry LED light bar is made up of different capacity series-parallel mode loads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721158920.1U CN207427513U (en) | 2017-09-11 | 2017-09-11 | A kind of adaptive New LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721158920.1U CN207427513U (en) | 2017-09-11 | 2017-09-11 | A kind of adaptive New LED driver |
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| Publication Number | Publication Date |
|---|---|
| CN207427513U true CN207427513U (en) | 2018-05-29 |
Family
ID=62316032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721158920.1U Active CN207427513U (en) | 2017-09-11 | 2017-09-11 | A kind of adaptive New LED driver |
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| Country | Link |
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| CN (1) | CN207427513U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109327936A (en) * | 2018-11-14 | 2019-02-12 | 上汽大众汽车有限公司 | A kind of circuit for lamp with effect of breathing |
| CN110366291A (en) * | 2019-07-05 | 2019-10-22 | 欧普照明股份有限公司 | With more specification light source load Auto-matchings for electric drive, lamps and lanterns and driving method |
| CN110461056A (en) * | 2019-07-05 | 2019-11-15 | 欧普照明股份有限公司 | The more specification light source loads of Auto-matching for electric drive, lamps and lanterns and driving method |
| CN110545606A (en) * | 2019-09-30 | 2019-12-06 | 中山市蓝德电子有限公司 | power supply method and power supply circuit adopting same |
-
2017
- 2017-09-11 CN CN201721158920.1U patent/CN207427513U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109327936A (en) * | 2018-11-14 | 2019-02-12 | 上汽大众汽车有限公司 | A kind of circuit for lamp with effect of breathing |
| CN110366291A (en) * | 2019-07-05 | 2019-10-22 | 欧普照明股份有限公司 | With more specification light source load Auto-matchings for electric drive, lamps and lanterns and driving method |
| CN110461056A (en) * | 2019-07-05 | 2019-11-15 | 欧普照明股份有限公司 | The more specification light source loads of Auto-matching for electric drive, lamps and lanterns and driving method |
| CN110461056B (en) * | 2019-07-05 | 2024-04-09 | 欧普照明股份有限公司 | Power supply driving, lamp and driving method capable of automatically matching loads of multiple light sources |
| CN110366291B (en) * | 2019-07-05 | 2024-04-09 | 欧普照明股份有限公司 | Power supply driving and lamp automatically matched with loads of light sources with multiple specifications and driving method |
| CN110545606A (en) * | 2019-09-30 | 2019-12-06 | 中山市蓝德电子有限公司 | power supply method and power supply circuit adopting same |
| CN110545606B (en) * | 2019-09-30 | 2024-11-05 | 中山市蓝德电子有限公司 | Power supply method and power supply circuit adopting same |
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