CN110011397A - A kind of power supply circuit - Google Patents
A kind of power supply circuit Download PDFInfo
- Publication number
- CN110011397A CN110011397A CN201910181356.2A CN201910181356A CN110011397A CN 110011397 A CN110011397 A CN 110011397A CN 201910181356 A CN201910181356 A CN 201910181356A CN 110011397 A CN110011397 A CN 110011397A
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- power supply
- circuit
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- electrolytic capacitor
- diode
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- 239000003990 capacitor Substances 0.000 claims abstract description 119
- 239000010409 thin film Substances 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 230000005611 electricity Effects 0.000 claims description 15
- 239000003381 stabilizer Substances 0.000 claims description 10
- 238000005868 electrolysis reaction Methods 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 241001465382 Physalis alkekengi Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of power supply circuits, including the first power supply branch and the second power supply branch, the first power supply branch to be configured to power to main loop of power circuit；Second power supply branch is configured to power to control circuit, including electrolytic capacitor EC1, charging circuit, detection circuit, discharge circuit, thin-film capacitor C2, wherein charging circuit charges in external power supply electrifying for electrolytic capacitor EC1 and thin-film capacitor C2；Detection circuit detects the pressure difference between thin-film capacitor C2 and electrolytic capacitor EC1；When detection circuit detects that pressure difference is more than preset value, electrolytic capacitor EC1's discharge circuit is discharged by discharge circuit to thin-film capacitor C2.The present invention not only can maintain control circuit work a period of time by the second power supply branch after external power cut-off, but also can control power supply circuit electrolytic capacitor EC1 is without charge and discharge during normal work, to solve the problems, such as that the main loop of power circuit harmonic wave of bring is unsatisfactory for requiring in electrolytic capacitor EC1 charge and discharge process.
Description
Technical field
The present invention relates to lighting technical fields, more particularly to a kind of power supply circuit.
Background technique
For some electrical equipments, need to limit the harmonic current of electrical equipment when power height is to laws and regulations requirement
System, laws and regulations requirement here can be with index quasi- IEC61000-3-2 or national standard GB17625.1.Such as the power of lamps and lanterns product is greater than
It is stringenter to its harmonic requirement when 25W, it is desirable that 3 subharmonic are less than 0.3* λ (λ is product power factor), 5 subharmonic are less than
10%, 7 subharmonic are less than less than 5%, 11 time or more harmonic wave of 7%, 9 subharmonic less than 3%.
For many intelligent control products, often requires that and control chip or MCU (Microcontroller after a loss of power
Unit, micro-control unit) etc. maintenances work on a period of time.The prior art maintains chip to continue usually using electrolysis energy storage
Work, but the harmonic current that electrolysis charge and discharge process will lead to product is unable to satisfy laws and regulations requirement.For example, intelligent control product
When not having energy storage electrolytic circuit, as shown in Figure 1, waveform comparison is smoothly and close to sine wave, harmonic current meets current waveform
Laws and regulations requirement.For another example after increasing energy storage electrolytic circuit in intelligent control product, current waveform as shown in Fig. 2, due to
It needs to cause harmonic current no longer full to charging is electrolysed so will appear a current spike at the top of waveform in high voltage
Sufficient laws and regulations requirement.The corresponding harmonic wave of the current waveform of Fig. 1 and Fig. 2 is as shown in table 1.
| Condition | 3 subharmonic | 5 subharmonic | 7 subharmonic | 9 subharmonic | 11 subharmonic | As a result |
| It is electroless | 17.26 | 2.55 | 2.77 | 2.56 | 1.33 | It is qualified |
| There is electrolysis | 14.57 | 3.95 | 2.86 | 1.16 | 3.18 | It is unqualified |
Table 1
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the power supply circuit of problem.
According to the present invention on the one hand, a kind of power supply circuit is provided, for main loop of power circuit and control circuit
Smart machine power supply, including the first power supply branch and the second power supply branch connected in parallel, wherein the first power supply branch is matched
It is set to the main loop of power circuit and powers；The second power supply branch is configured to power to the control circuit, including electrolysis electricity
Hold EC1, charging circuit, detection circuit, discharge circuit, thin-film capacitor C2, wherein
The charging circuit has input terminal and output end, and input terminal connects external power supply, and output end connects the electricity
The anode for solving capacitor EC1 is configured to fill when the external power supply powers on for the electrolytic capacitor EC1 and thin-film capacitor C2
Electricity；
The detection circuit, there are two test side, one ends to be connected to the charging circuit and the electrolytic capacitor EC1 for tool
Between, the other end connects the one end the thin-film capacitor C2, be configured to detect the thin-film capacitor C2 and electrolytic capacitor EC1 it
Between pressure difference；
The discharge circuit, has input terminal and output end, and input terminal connects the electrolytic capacitor EC1 anode, output
End connection one end the thin-film capacitor C2 is configured to when the detection circuit detects that the pressure difference is more than preset value, by
The electrolytic capacitor EC1 is powered by the discharge circuit to the control circuit.
Optionally, the power supply circuit further include:
Rectification module has input terminal and output end, and input terminal connects the external power supply, and output end is separately connected institute
The first power supply branch and the second power supply branch are stated, is configured to rectify the external power supply, and the electric current after rectification is mentioned
It is supplied to the first power supply branch and the second power supply branch.
Optionally, the charging circuit includes diode D1 and diode D2,
The diode D1, anode connect the output end of the rectification module, and cathode is connecting the diode D2 just
Pole and the one end the thin-film capacitor C2, the diode D1 are configured to prevent the thin-film capacitor C2 to the first power supply branch
Electric discharge；
The diode D2, cathode connect the anode of the electrolytic capacitor EC1, and the diode D2 is configured to prevent institute
Electrolytic capacitor EC1 is stated to the first power supply branch electric discharge.
Optionally, the rectification module includes rectifier bridge DB1,
The rectifier bridge DB1, there are two input terminal and two output ends, two input terminals to connect the external electrical for tool
Source rectifies the electric current of the external power supply received, and the electric current after rectification is exported respectively through two output end
To the first power supply branch and the second power supply branch connected in parallel.
Optionally, the detection circuit include voltage-stabiliser tube ZD1, with the concatenated resistance R1 of the pressure pipe ZD1, switch element,
Diode D3,
The switch element is connected between the resistance R1 and the anode of the diode D3, the diode D3's
Cathode connects the thin-film capacitor C2, the discharge circuit when not working the switch element it is in an off state；
The voltage-stabiliser tube ZD1, cathode connect the anode of the electrolytic capacitor EC1, and anode connects the resistance R1, described
The pressure stabilizing value of voltage-stabiliser tube ZD1 is greater than ripple voltage Δ V present on the thin-film capacitor C2.
Optionally, the discharge circuit includes the switch element and diode D3 shared with the detection circuit, is matched
It is set to when the detection circuit detects that the pressure difference is more than preset value, controls the switch element and open, so that described
Electrolytic capacitor EC1 discharges to the thin-film capacitor C2.
Optionally, the switch element includes:
Triode Q1, emitter connect the anode of the diode D3, and collector is connecting the electrolytic capacitor EC1 just
Pole, base stage connect the resistance R1.
Optionally, the first power supply branch includes thin-film capacitor C1, in parallel with the rectification module, is configured to main function
Rate loop power supply.
The power supply circuit of the embodiment of the present invention can be used for having main loop of power circuit and the power supply of the smart machine of control circuit,
Main includes the first power supply branch and the second power supply branch connected in parallel, and the first power supply branch is configured to supply to main loop of power circuit
Electricity, the second power supply branch are configured to power to control circuit, pass through charging electricity when external power supply is started power up to power supply circuit
Road is charged to electrolytic capacitor EC1, and after external power supply power-off, the voltage on thin-film capacitor C2 starts to reduce, if detection circuit is examined
When measuring the pressure difference between the voltage on thin-film capacitor C2 and electrolytic capacitor EC1 more than preset value, passed through by electrolytic capacitor EC1
Discharge circuit discharges to thin-film capacitor C2.The embodiment of the present invention can not only supply after external power cut-off by second as a result,
Electric branch maintains control circuit work a period of time, and power supply circuit during normal work electrolytic capacitor EC1 not into
Row charge and discharge can make the charging in electrolytic capacitor EC1 maintain maximum value, to solve electrolytic capacitor EC1 charge and discharge
The main loop of power circuit harmonic wave of bring is unsatisfactory for the problem of requiring in journey.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
The current waveform figure that Fig. 1 shows intelligent control product in the prior art when not having energy storage electrolytic circuit；
Current waveform figure when energy storage electrolytic circuit is provided with Fig. 2 shows intelligent control product in the prior art；
Fig. 3 shows the structural schematic diagram of power supply circuit according to an embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
In order to solve the above technical problems, the embodiment of the invention provides a kind of power supply circuit, for being returned to main power
The power supply of the smart machine of road and control circuit, smart machine here includes Intelligent lamp, intelligent electric appliance etc., and Intelligent lamp can
To be wireless blue tooth light modulation product or wired light modulation product etc..Fig. 3 shows power supply electricity according to an embodiment of the invention
The structural schematic diagram on road.Referring to Fig. 3, power supply circuit includes the first power supply branch 1 and second power supply branch 2 connected in parallel,
In, the first power supply branch 1 is configured to the power supply of the main loop of power circuit (not shown) into smart machine, the second power supply branch 2
Be configured to power to control circuit (not shown), the control circuit in the embodiment can using include control chip or
The control circuit of the low-power consumption such as MCU (Microcontroller Unit, micro-control unit).
Second power supply branch 2 in further include have electrolytic capacitor EC1, charging circuit 21, detection circuit 22, discharge circuit 23,
Thin-film capacitor C2 is below introduced each section in the second power supply branch 2 respectively.
Charging circuit 21 has input terminal and output end, and the input terminal of charging circuit 21 connects external power supply (i.e. alternating current),
The anode of output end connection electrolytic capacitor EC1.Charging circuit 21 can be electrolytic capacitor EC1 and film in external power supply electrifying
Capacitor C2 charging.
There are two test sides for the tool of detection circuit 22, and one end of detection circuit 22 is connected to charging circuit 21 and electrolytic capacitor
Between EC1, the other end connects the one end thin-film capacitor C2.Detection circuit 22 can detecte thin-film capacitor C2 and electrolytic capacitor EC1 it
Between pressure difference.
Discharge circuit 23 has input terminal and output end, and the input terminal connection electrolytic capacitor EC1 anode of discharge circuit 23 is defeated
Outlet connects the one end thin-film capacitor C2, when detection circuit 22 detects the pressure difference between thin-film capacitor C2 and electrolytic capacitor EC1
When more than preset value, electrolytic capacitor EC1 is discharged by discharge circuit 23 to control circuit, i.e., is control by electrolytic capacitor EC1
Circuit power supply.Certainly, it during electrolytic capacitor EC1 discharges to control circuit, can also discharge to thin-film capacitor C2, thin-film electro
Hold C2 and then powers again to control circuit.
In this embodiment, the cathode of electrolytic capacitor EC1 and the thin-film capacitor C2 other end are grounded.
The embodiment of the present invention not only can maintain control circuit work by the second power supply branch after external power cut-off
For a period of time, and power supply circuit electrolytic capacitor EC1 during normal work can make electrolytic capacitor without charge and discharge
Charging in EC1 maintains maximum value, will not influence the harmonic wave of main loop of power circuit, to solve electrolytic capacitor EC1 charge and discharge
The main loop of power circuit harmonic wave of bring is unsatisfactory for the problem of requiring in the process.
In an embodiment of the present invention, the lesser capacitor of capacity can be used in the first power supply branch 1, as thin in Fig. 3
Membrane capacitance C1, thin-film capacitor C1 is in parallel with rectification module, for powering to main loop of power circuit, so that main loop of power circuit meets Gao Gong
Rate factor PF.
In an embodiment of the present invention, power supply circuit further includes rectification module, and rectification module has input terminal and output end,
The input terminal of rectification module connects external power supply, and output end is separately connected the first power supply branch 1 and the second power supply branch 2, configuration
To rectify to external power supply, and the electric current after rectification is provided to the first power supply branch 1 and the second power supply branch 2.
In inventing an optional implementation, rectification module can be had using rectifier bridge DB1 shown in Fig. 3, rectifier bridge DB1
Two input terminals and two output ends, two input terminal connect external power supply, and to the electric current of the external power supply received into
Row rectification, and then the electric current after rectification is exported respectively through two output end to the first power supply branch 1 and connected in parallel the
Two power supply branches 2.
With continued reference to Fig. 3, in an embodiment of the present invention, charging circuit 21 includes diode D1 and diode D2, two poles
The output end of the anode connection rectification module of pipe D1, cathode connect the anode and thin-film capacitor C2 unearthed one of diode D2
End.The anode of the cathode connection electrolytic capacitor EC1 of diode D2.When external power supply powers on for the first time bus by diode D1 and
Diode D2 charges respectively to electrolytic capacitor EC1 and thin-film capacitor C2, and the voltage after charging complete on electrolytic capacitor EC1 is
The peak value Vinpk of input voltage (i.e. outer power voltage), about 1.414*Vin (input voltage).
In the embodiment, diode D1 is prevented for effectively preventing thin-film capacitor C2 from discharging to the first power supply branch 1
Thin-film capacitor C2 discharges to main loop of power circuit.Diode D2 is for effectively preventing electrolytic capacitor EC1 from putting to the first power supply branch 1
Electricity, i.e. prevention electrolytic capacitor EC1 discharge to main loop of power circuit.
It may include that voltage-stabiliser tube ZD1 and pressure pipe ZD1 goes here and there in detection circuit 22 in an embodiment of the present invention referring to Fig. 3
Resistance R1, switch element, the diode D3 of connection, wherein switch element is connected between resistance R1 and the anode of diode D3, and two
The cathode of pole pipe D3 connects thin-film capacitor C2, and switch element is in an off state when discharge circuit 23 does not work.
The anode of the cathode connection electrolytic capacitor EC1 of voltage-stabiliser tube ZD1, the anode connection resistance R1 of voltage-stabiliser tube ZD1, voltage-stabiliser tube
The pressure stabilizing value of ZD1 is greater than ripple voltage Δ V present on thin-film capacitor C2.
Since thin-film capacitor C2 can maintain control circuit to work after external power cut-off, and it is thin in each power cycle
Membrane capacitance C2 can carry out charge and discharge, therefore can have voltage ripple on thin-film capacitor C2, if the ripple electricity on thin-film capacitor C2
Pressure is Δ V, and voltage of the ripple voltage at the lowest point on thin-film capacitor C2 is Vinpk- Δ V.It is steady by choosing in the embodiment
The voltage value of pressure pipe ZD1 is greater than Δ V, it is ensured that switch element is in disconnection shape always in power supply circuit course of normal operation
State, electrolytic capacitor EC1 will not discharge.
Referring to Fig. 3, in an embodiment of the present invention, discharge circuit 23 include with detection circuit 22 share switch element and
Diode D3, after external power supply disconnects, thin-film capacitor C2 voltage is reduced, and detects thin-film capacitor C2 and electricity in detection circuit 22
When solving the pressure difference between capacitor EC1 more than preset value, control switch element is opened, so that electrolytic capacitor EC1 passes through electric discharge electricity
It discharges to thin-film capacitor C2 on road 23.
In an embodiment of the present invention, switch element is using triode Q1 shown in Fig. 3, the emitter of triode Q1
The anode of diode D3, the anode of the collector connection electrolytic capacitor EC1 of triode Q1 are connected, the base stage of triode Q1 connects electricity
Hinder R1.Certainly, switch element can also use other elements, and the embodiment of the present invention does not do specific restriction to this.
In power supply circuit course of normal operation, since the voltage value of voltage-stabiliser tube ZD1 is greater than Δ V, triode (is opened
Closing element Q1) base voltage is consistently lower than the voltage on thin-film capacitor C2, so that triode be made to be in off state always, it is electrolysed
Capacitor EC1 will not discharge.After external power supply disconnects, thin-film capacitor C2 voltage is reduced, and detects thin-film electro in detection circuit 22
When holding the pressure difference between C2 and electrolytic capacitor EC1 more than preset value, the base voltage of triode is higher than on thin-film capacitor C2
Voltage meets the turn-on condition of triode, and electrolytic capacitor EC1 starts to discharge to thin-film capacitor C2 after triode ON, with dimension
Hold the control chip in control circuit or MCU work a period of time.
The power supply circuit of the embodiment of the present invention both ensure that by increasing the electrolytic capacitor EC1 in the second power supply branch
The second power supply branch can also maintain control circuit to work on a period of time after external power supply power-off, and can effectively eliminate electricity
The problem of main power circuit caused by solution capacitor EC1 charge and discharge is unsatisfactory for harmonic requirement.It is produced if the power supply circuit is applied to light modulation
Product, user pass through the control circuit continuation that light modulation product can be effectively ensured when the adjusting for being switched fast switch progress lamp brightness
Work is maintained, smoothly to realize the light modulation of lamps and lanterns.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: at this
Within the spirit and principle of invention, it is still possible to modify the technical solutions described in the foregoing embodiments or right
Some or all of the technical features are equivalently replaced；And these are modified or replaceed, and do not make corresponding technical solution de-
From protection scope of the present invention.
Claims (8)
1. a kind of power supply circuit, for the smart machine power supply with main loop of power circuit and control circuit, including the first power supply
Branch and the second power supply branch connected in parallel, wherein the first power supply branch is configured to power to the main loop of power circuit；
The second power supply branch is configured to power to the control circuit, including electrolytic capacitor EC1, charging circuit, detection circuit, puts
Circuit, thin-film capacitor C2, wherein
The charging circuit has input terminal and output end, and input terminal connects external power supply, and output end connects the electrolysis electricity
The anode for holding EC1 is configured to charge when the external power supply powers on for the electrolytic capacitor EC1 and thin-film capacitor C2；
The detection circuit, tool there are two test side, one end be connected to the charging circuit and the electrolytic capacitor EC1 it
Between, the other end connects the one end the thin-film capacitor C2, is configured to detect between the thin-film capacitor C2 and the electrolytic capacitor EC1
Pressure difference；
The discharge circuit has input terminal and output end, and input terminal connects the electrolytic capacitor EC1 anode, and output end connects
The one end the thin-film capacitor C2 is connect, is configured to when the detection circuit detects that the pressure difference is more than preset value, by described
Electrolytic capacitor EC1 is powered by the discharge circuit to the control circuit.
2. power supply circuit according to claim 1, wherein the power supply circuit further include:
Rectification module, has input terminal and an output end, and input terminal connects the external power supply, and output end is separately connected described the
One power supply branch and the second power supply branch, are configured to rectify the external power supply, and the electric current after rectification is provided to
The first power supply branch and the second power supply branch.
3. power supply circuit according to claim 2, wherein the charging circuit includes diode D1 and diode D2,
The diode D1, anode connect the output end of the rectification module, cathode connect the diode D2 anode and
The one end the thin-film capacitor C2, the diode D1 are configured to that the thin-film capacitor C2 is prevented to put to the first power supply branch
Electricity；
The diode D2, cathode connect the anode of the electrolytic capacitor EC1, and the diode D2 is configured to prevent the electricity
Capacitor EC1 is solved to the first power supply branch electric discharge.
4. power supply circuit according to claim 2, wherein the rectification module includes rectifier bridge DB1,
The rectifier bridge DB1, for tool there are two input terminal and two output ends, two input terminal connects the external power supply, right
The electric current of the external power supply received is rectified, and the electric current after rectification is exported respectively through two output end to described
First power supply branch and the second power supply branch connected in parallel.
5. power supply circuit according to claim 1-4, wherein the detection circuit includes voltage-stabiliser tube ZD1 and institute
The concatenated resistance R1 of pressure pipe ZD1, switch element, diode D3 are stated,
The switch element is connected between the resistance R1 and the anode of the diode D3, the cathode of the diode D3
Connect the thin-film capacitor C2, the discharge circuit when not working the switch element it is in an off state；
The voltage-stabiliser tube ZD1, cathode connect the anode of the electrolytic capacitor EC1, and anode connects the resistance R1, the pressure stabilizing
The pressure stabilizing value of pipe ZD1 is greater than ripple voltage Δ V present on the thin-film capacitor C2.
6. power supply circuit according to claim 5, wherein
The discharge circuit includes the switch element and diode D3 shared with the detection circuit, is configured in the inspection
When slowdown monitoring circuit detects that the pressure difference is more than preset value, control the switch element and open so that the electrolytic capacitor EC1 to
The thin-film capacitor C2 electric discharge.
7. power supply circuit according to claim 6, wherein the switch element includes:
Triode Q1, emitter connect the anode of the diode D3, and collector connects the anode of the electrolytic capacitor EC1,
Base stage connects the resistance R1.
8. according to the described in any item power supply circuits of claim 2-4, wherein the first power supply branch includes thin-film capacitor
C1, it is in parallel with the rectification module, it is configured to power to the main loop of power circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910181356.2A CN110011397B (en) | 2019-03-11 | 2019-03-11 | Power supply circuit |
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|---|---|---|---|
| CN201910181356.2A CN110011397B (en) | 2019-03-11 | 2019-03-11 | Power supply circuit |
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| CN110011397B CN110011397B (en) | 2024-04-23 |
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