CN106885933B - A kind of current sampling circuit suitable for Superbuck converter - Google Patents
A kind of current sampling circuit suitable for Superbuck converter Download PDFInfo
- Publication number
- CN106885933B CN106885933B CN201710211470.6A CN201710211470A CN106885933B CN 106885933 B CN106885933 B CN 106885933B CN 201710211470 A CN201710211470 A CN 201710211470A CN 106885933 B CN106885933 B CN 106885933B
- Authority
- CN
- China
- Prior art keywords
- current
- superbuck
- sample
- point
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of current sampling circuits suitable for Superbuck converter, comprising: the first sample circuit and the second sample circuit independently concatenated；Current sample transformer T in first sample circuit1Primary side winding series connection access Superbuck inverter main circuit p1~p3Point, for acquiring p1To p3Point electric current iQ1, by the electric current i of acquisitionQ1It is transmitted to the current sample transformer T1Secondary side, formed the first current signal；Current sample transformer T in second sample circuit2Primary side winding series connection access Superbuck inverter main circuit p1~p2Point, for acquiring p1To p2Point electric current iC1, by the electric current i of acquisitionC1It is transmitted to the current sample transformer T2Secondary side, formed the second current signal.The present invention realizes the sampling of the isolation to the input current of Superbuck converter, reduces delay, while reducing loss.
Description
Technical field
The invention belongs to current sampling technique fields more particularly to a kind of electric current suitable for Superbuck converter to adopt
Sample circuit.
Background technique
Superbuck converter belongs to decompression quasi-converter topological structure, has and Buck base in Switching Power Supply topology
The identical voltage change ratio of this code converter, i.e. output voltage are equal to input voltage multiplied by duty ratio.
Referring to Fig.1, a kind of topology theory figure of existing Superbuck converter is shown；Fig. 2 is shown a kind of existing
The topology theory figure for the basic Buck converter having.By Fig. 1 and 2 it is found that Superbuck converter is double inductance and double capacitive junctions
Structure has the characteristics that high efficiency, input and output electric current are continuous, and therefore, Superbuck converter is gradually widely used in space flight
In power-supply system.
Compared with traditional Buck converter, the input current of Superbuck converter is the first inductance L1Inductance electricity
Stream, output electric current are equal to the first inductance L1With the second inductance L2The sum of inductive current, therefore its input and output electric current is continuous, fits
It shares in requiring EMC stringent occasion.On the other hand, for buck convertor, according to conservation of energy principle, due to
Output voltage is less than input voltage, and therefore, the output electric current for being depressured quasi-converter is always greater than input current.For Superbuck
For converter, output electric current is equal to the first inductance L1With the second inductance L2The sum of inductive current, therefore, to export electric current line
When wave is mutually all condition design, loss caused by inductance is far below the inductance damage in Buck converter in Superbuck converter
Consumption.Due to above-mentioned characteristic, Superbuck converter topology is widely used in the single machine design of space power system, for connecing
Mouth solar battery array and accumulator equipment, to guarantee high-efficiency transfer energy and low EMI effect.
Since the ground connection in space power system for electronic equipment has stringent regulation, it is applied to space power
Superbuck converter in system can not carry out current sample by the way of the series connection access sampling resistor in loop line, this
It is due to that two terminal potential of sampling resistor will be caused different in such a way that sampling resistor is added in loop line, on another aspect sampling resistor
The electric current flowed through is larger, be easy to cause power consumption in sample circuit larger, makes the reduction of converter topology efficiency.In addition, due to space flight
Radiation environment has different degrees of influence to Hall sensor equimagnetic electrical sensor measurement accuracy in system, simultaneously because suddenly
You are larger the delay time of sensor sample signal, therefore should avoid making for Hall sensor as far as possible in the design of sample circuit
With.
In summary reason, in space power system field, outputting and inputting for Superbuck converter at this stage
The sampling of electric current generallys use main track current sample method: based on sampling resistor, carrying out differential mode electricity by operational amplifier
It presses and obtains sampled value greatly.For existing main track current sample method, when electric current is larger, the loss meeting of sampling resistor generation
It increases, this will affect overall efficiency；When positive line voltage is higher, the stress levels of component employed in sample circuit
It is also required to improve；In addition, sample circuit be not isolated electrically with control circuit.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of suitable for Superbuck converter
Current sampling circuit, realize the isolation to the input current of Superbuck converter sampling, reduce delay, drop simultaneously
Low loss.
In order to solve the above-mentioned technical problem, the invention discloses a kind of current samples suitable for Superbuck converter
Circuit, comprising: the first sample circuit and the second sample circuit independently concatenated；
The primary side winding series connection access Superbuck converter of current sample transformer T1 in first sample circuit
The p of main circuit1~p3Point, for acquiring p1To p3Point electric current iQ1, by the electric current i of acquisitionQ1It is transmitted to the current sample transformer
T1Secondary side, formed the first current signal；Wherein, the electric current iQ1For interrupted current；
Current sample transformer T in second sample circuit2Primary side winding series connection access Superbuck converter
The p of main circuit1~p2Point, for acquiring p1To p2Point electric current iC1, by the electric current i of acquisitionC1It is transmitted to the current sample transformer
T2Secondary side, formed the second current signal；Wherein, the electric current iC1For interrupted current；
Wherein, the current sample transformer T1With the current sample transformer T2Identical electricity is completely independent for two groups
Stream sampling transformer；The current sample transformer T1With current sample transformer T2The former vice-side winding turn ratio it is identical, be 1:
N；
The p1Point is the first inductance L in the Superbuck inverter main circuit1With first capacitor C1Tie point；
The p2Point is the p1Point and the first capacitor C in the Superbuck inverter main circuit1Between any point；It is described
p3Point is the p1Point and the switching tube Q in the Superbuck inverter main circuit1Between any point.
Above-mentioned suitable for the current sampling circuit of Superbuck converter, first sample circuit includes: described
Current sample transformer T1, resistance Rs1With diode D2；Second sample circuit includes: the current sample transformer T2With
Resistance Rs2；Wherein, the resistance Rs1With the resistance Rs2Resistance value it is identical；
The current sample transformer T1Vice-side winding connect the resistance Rs1With diode D2；The diode D2 sun
The ground where the current sampling circuit is accessed in pole；Wherein, the current sampling circuit and Superbuck inverter main circuit every
From or be shorted；
The current sample transformer T2Vice-side winding connect the resistance Rs2；
The current sample transformer T2Vice-side winding low potential and the current sample transformer T1Vice-side winding
High potential be shorted.
Above-mentioned suitable for the current sampling circuit of Superbuck converter, when the main electricity of Superbuck converter
Switching tube Q in road1Duty ratio be greater than 0.5 when, the current sampling circuit further include: current-limiting resistance RcomAnd accessory power supply
VCC；The current-limiting resistance RcomRespectively with the accessory power supply VCCWith the diode D2Cathode connection；Wherein, the current limliting
Resistance RcomWith accessory power supply VCC, for the current sample transformer T1Carry out magnetic reset；The accessory power supply VCCRelative to
The ground potential of sampled signal is positive polarity voltage.
Above-mentioned suitable for the current sampling circuit of Superbuck converter, the Superbuck inverter main circuit
It include: input power Vg, the first inductance L1, the second inductance L2, first capacitor C1, the second capacitor C2, switching tube Q1, diode D1With
Load resistance R.
The invention has the following advantages that
Current sampling circuit of the present invention suitable for Superbuck converter, it is completely only by two groups of setting
Founding identical current sample transformer realizes the sampling of the isolation to Superbuck circuit input current, by current sample
Required input current value can be calculated by sampled voltage for the design of transformer turns ratio and sampling resistor.With it is traditional
Resistance sampling method compared to reduce sampling loss, while in sampling process caused by postpone to ignore, have in high precision,
The characteristics of quick response.
Detailed description of the invention
Fig. 1 is a kind of topology theory figure of existing Superbuck converter；
Fig. 2 is a kind of topology theory figure of existing basic Buck converter；
Fig. 3 is a kind of current sampling circuit and Superbuck suitable for Superbuck converter in the embodiment of the present invention
The connection schematic diagram of inverter main circuit；
Fig. 4 is a kind of current waveform schematic diagram in the embodiment of the present invention；
Fig. 5 is a kind of circuit structure of the current sampling circuit suitable for Superbuck converter in the embodiment of the present invention
Schematic diagram；
Fig. 6 is a kind of simulation result schematic diagram in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, public to the present invention below in conjunction with attached drawing
Embodiment is described in further detail.
Referring to Fig. 3, show in the embodiment of the present invention a kind of current sampling circuit suitable for Superbuck converter with
The connection schematic diagram of Superbuck inverter main circuit.In the present embodiment, the electricity suitable for Superbuck converter
Flowing sample circuit includes: the first sample circuit and the second sample circuit independently concatenated.
Wherein, it should be noted that in the present embodiment, the Superbuck inverter main circuit may include: input
Power supply Vg, the first inductance L1, the second inductance L2, first capacitor C1, the second capacitor C2, switching tube Q1, diode D1And load resistance
R.Wherein, the input current of Superbuck converter is the first inductance L1Electric current iL1, electric current iL1It can be analyzed to flow through switch
Pipe Q1Electric current iQ1With flow through first capacitor C1Electric current iC1.Wherein, switching tube Q1The electric current i of place branchQ1For interrupted current,
First capacitor C1The electric current i of place branchC1It is equally also interrupted current.
Referring to Fig. 4, a kind of current waveform schematic diagram in the embodiment of the present invention is shown.In the present embodiment, when topological steady
When state works, electric current iL1, electric current iQ1With electric current iC1Waveform as shown in described Fig. 4.Wherein, t0~t1Period is input current
Rise time section, t1~t2Period is input current fall time section.
In the present embodiment, the design of the first sample circuit and the second sample circuit that independently concatenate reduces two groups of changes
Depressor (current sample transformer T1With current sample transformer T2) magnetic reset process influences each other.As Fig. 3, described first is adopted
Current sample transformer T in sample circuit1Primary side winding series connection access Superbuck inverter main circuit p1~p3Point is used
In acquisition p1To p3Point electric current iQ1, by the electric current i of acquisitionQ1It is transmitted to the current sample transformer T1Secondary side, formed first
Current signal；Wherein, the electric current iQ1For interrupted current.Current sample transformer T in second sample circuit2Primary side
The p of windings in series access Superbuck inverter main circuit1~p2Point, for acquiring p1To p2Point electric current iC1, by the electricity of acquisition
Flow iC1It is transmitted to the current sample transformer T2Secondary side, formed the second current signal；Wherein, the electric current iC1For discontinuously electricity
Stream.
In the present embodiment, the current sample transformer T1With current sample transformer T2It is completely independent for two groups identical
Current sample transformer.The current sample transformer T1With current sample transformer T2The former vice-side winding turn ratio it is identical,
For 1:N.Wherein, the N can be any suitable value, the present embodiment to this with no restriction.
In the present embodiment, the current sample transformer T1Primary side winding series connection access Superbuck converter master
The p of circuit1~p3Point, for acquiring p1To p3Point electric current iQ1, by the electric current i of acquisitionQ1It is transmitted to the current sample transformer T1
Secondary side, formed the first current signal.Current sample transformer T2Primary side winding series connection access the main electricity of Superbuck converter
The p on road1~p2Point, for acquiring p1To p2Point electric current iC1, by the electric current i of acquisitionC1It is transmitted to the current sample transformer T2's
Secondary side forms the second current signal.Wherein, the electric current iQ1With the electric current iC1It is interrupted current, can be adopted by electric current
Sample transformer (current sample transformer T1With current sample transformer T2) it is transmitted to secondary side formation current signal, without will cause
Transformer magnetic saturation.
In conjunction with Fig. 3 it is found that in the present embodiment, the p1Point is first in the Superbuck inverter main circuit
Inductance L1With first capacitor C1Tie point；The p2Point is the p1Point and the in the Superbuck inverter main circuit
One capacitor C1Between any point；The p3Point is the p1Point and the switching tube in the Superbuck inverter main circuit
Q1Between any point.
In the preferred embodiment of the present invention, it referring to Fig. 5, shows one kind in the embodiment of the present invention and is suitable for
The electrical block diagram of the current sampling circuit of Superbuck converter.Such as Fig. 5, first sample circuit includes: described
Current sample transformer T1, resistance Rs1With diode D2.Second sample circuit includes: the current sample transformer T2With
Resistance Rs2.Wherein, the resistance Rs1With the resistance Rs2Resistance value it is identical.
Preferably, the current sample transformer T1Vice-side winding connect the resistance Rs1With diode D2；Described two
Pole pipe D2 anode accesses the ground where the current sampling circuit.Wherein, the current sampling circuit and Superbuck converter
Main circuit, which can isolate, to be shorted.
Preferably, the current sample transformer T2Vice-side winding connect the resistance Rs2。
Preferably, the current sample transformer T2Vice-side winding low potential and the current sample transformer T1's
The high potential of vice-side winding is shorted.
In the present embodiment, as the resistance R of selections1With resistance Rs2Resistance value it is identical when, resistance Rs1With resistance Rs2It is formed
Series voltage usIt can be with the input current i of Superbuck inverter main circuitL1Form certain proportionate relationship:
iL1=us*N/RsFormula (1)
Wherein, RsIndicate resistance Rs1With resistance Rs2Resistance value.
It is further preferred that in the present embodiment, the switching tube Q in the Superbuck inverter main circuit1Account for
When sky is than being greater than 0.5, the current sampling circuit further include: current-limiting resistance RcomWith accessory power supply VCC；The current-limiting resistance Rcom
Respectively with the accessory power supply VCCWith the diode D2Cathode connection；Wherein, the current-limiting resistance RcomAnd accessory power supply
VCC, for the current sample transformer T1Carry out magnetic reset；The accessory power supply VCCGround potential relative to sampled signal
For positive polarity voltage.
In the present embodiment, the current waveform referring to described in Fig. 4 simply introduces the working principle of sample circuit.
In t0-t1Period flows through switching tube Q1Electric current iQ1With flow through first capacitor C1Electric current iC1Pass through current sample transformation respectively
Device T1With current sample transformer T2Effect, so that transformer secondary side current amplitude is reduced to the 1/N of primary current amplitude, fold respectively
It is added in resistance Rs1With resistance Rs2Upper formation pressure drop, therefore resistance Rs1With resistance Rs2Obtained total voltage of connecting is current sample
It is worth corresponding voltage.In t1-t2Period, since switching tube flows through Q1Electric current iQ1Equal to zero, therefore current sample transformer
T1 pair side no signal current, resistance Rs1Both ends pressure drop is 0.And flow through first capacitor C1Electric current iC1By current sample transformer
T2Act on resistance Rs2Upper formation pressure drop, therefore resistance Rs1With resistance Rs2Obtained total voltage of connecting still reflects electric current and adopts
The size of sample value.In conclusion in one cycle, resistance Rs1With resistance Rs2Series voltage usReflect electric current iL1's
Waveform.
In the present embodiment, due to flowing through switching tube Q1Electric current iQ1Only unidirectional current, therefore, in current sample transformation
Device T1The secondary winding that becomes increase diode D2Rectification, to prevent influence of the magnetic reset process to output result.In actual application
In, switching tube Q1Duty ratio is likely larger than 0.5, when the work of Superbuck inverter main circuit is in operating condition of the duty ratio greater than 0.5
When, current sampling circuit pair side needs to be added current-limiting resistance RcomWith accessory power supply VCCTo current sample transformer T1It is multiple to carry out magnetic
Position.As shown in figure 5, accessory power supply VCCGround potential relative to sampled signal is positive polarity voltage.Preferably, if design requirement
In have isolation requirement to sample circuit, then need using isolation accessory power supply VCCWith current-limiting resistance RcomMagnetic reset is carried out, if nothing
Demand, then the input voltage that Superbuck converter can be directly used carries out magnetic reset, to reduce the complexity of magnetic reset power supply
Property.
In the present invention, l-G simulation test has been carried out to the current sampling circuit suitable for Superbuck converter.
Power Simulation (abbreviation PSIM, electrical simulation software) software is built according to foregoing circuit topology theory figure
Emulation platform, wherein main circuit parameter is as follows:
| First inductance L1 | 250uH | Input voltage Vg | 42V |
| Second inductance L2 | 110uH | Load resistance R | 4Ω |
| First capacitor C1 | 2.5uF | Switching tube Q1Duty ratio | 0.5 |
| Second capacitor C2 | 10uF | Output voltage Vout | 21V |
| Sampling resistor Rs value | 10Ω | Current sample transformer turns ratio (1:N) | 1:10 |
Referring to Fig. 6, a kind of simulation result schematic diagram in the embodiment of the present invention is shown.Such as Fig. 6, four waveforms are successively are as follows:
Electric current iL1(input inductive current), electric current iC1, electric current iQ1With series voltage usWaveform diagram.According to above-mentioned formula it is found that us's
Voltage value and electric current iL1It is worth identical, above-mentioned principle is verified by l-G simulation test.The result shows that the sample circuit can be with
Isolation sampling effectively is carried out to input current, sampling loss is reduced compared with traditional resistance sampling method, while sampling
Delay caused by the process can be ignored, and have the characteristics that high-precision, quick response.
Various embodiments are described in a progressive manner in this explanation, the highlights of each of the examples are with its
The difference of his embodiment, the same or similar parts between the embodiments can be referred to each other.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (4)
1. a kind of current sampling circuit suitable for Superbuck converter characterized by comprising first independently concatenated
Sample circuit and the second sample circuit；
Current sample transformer T in first sample circuit1Primary side winding series connection access the main electricity of Superbuck converter
The p on road1~p3Point, for acquiring p1To p3Point electric current iQ1, by the electric current i of acquisitionQ1It is transmitted to the current sample transformer T1's
Secondary side forms the first current signal；Wherein, the electric current iQ1For interrupted current；
Current sample transformer T in second sample circuit2Primary side winding series connection access the main electricity of Superbuck converter
The p on road1~p2Point, for acquiring p1To p2Point electric current iC1, by the electric current i of acquisitionC1It is transmitted to the current sample transformer T2's
Secondary side forms the second current signal；Wherein, the electric current iC1For interrupted current；
Wherein, the current sample transformer T1With the current sample transformer T2Identical electric current is completely independent for two groups to adopt
Sample transformer；The current sample transformer T1With current sample transformer T2The former vice-side winding turn ratio it is identical, be 1:N；
The p1Point is the first inductance L in the Superbuck inverter main circuit1With first capacitor C1Tie point；It is described
p2Point is the p1Point and the first capacitor C in the Superbuck inverter main circuit1Between any point；The p3Point
For the p1Point and the switching tube Q in the Superbuck inverter main circuit1Between any point.
2. current sampling circuit according to claim 1, which is characterized in that first sample circuit includes: the electricity
Stream sampling transformer T1, resistance Rs1With diode D2；Second sample circuit includes: the current sample transformer T2And electricity
Hinder Rs2；Wherein, the resistance Rs1With the resistance Rs2Resistance value it is identical；
The current sample transformer T1Vice-side winding connect the resistance Rs1With diode D2；The diode D2Anode connects
Enter the ground where the current sampling circuit；Wherein, the current sampling circuit be isolated with Superbuck inverter main circuit or
It is shorted；
The current sample transformer T2Vice-side winding connect the resistance Rs2；
The current sample transformer T2Vice-side winding low potential and the current sample transformer T1Vice-side winding height
Current potential is shorted.
3. current sampling circuit according to claim 2, which is characterized in that when the Superbuck inverter main circuit
In switching tube Q1Duty ratio be greater than 0.5 when, the current sampling circuit further include: current-limiting resistance RcomWith accessory power supply VCC；
The current-limiting resistance RcomRespectively with the accessory power supply VCCWith the diode D2Cathode connection；Wherein, the current-limiting resistance
RcomWith accessory power supply VCC, for the current sample transformer T1Carry out magnetic reset；The accessory power supply VCCRelative to sampling
The ground potential of signal is positive polarity voltage.
4. current sampling circuit according to claim 1, which is characterized in that the Superbuck inverter main circuit packet
It includes: input power Vg, the first inductance L1, the second inductance L2, first capacitor C1, the second capacitor C2, switching tube Q1, diode D1With it is negative
Carry resistance R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710211470.6A CN106885933B (en) | 2017-04-01 | 2017-04-01 | A kind of current sampling circuit suitable for Superbuck converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710211470.6A CN106885933B (en) | 2017-04-01 | 2017-04-01 | A kind of current sampling circuit suitable for Superbuck converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106885933A CN106885933A (en) | 2017-06-23 |
| CN106885933B true CN106885933B (en) | 2019-05-24 |
Family
ID=59181717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710211470.6A Active CN106885933B (en) | 2017-04-01 | 2017-04-01 | A kind of current sampling circuit suitable for Superbuck converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106885933B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946199A (en) * | 2012-11-09 | 2013-02-27 | 联合汽车电子有限公司 | Direct current insulation buck converter and matrix voltage detection circuit thereof |
| CN103378602A (en) * | 2012-04-20 | 2013-10-30 | 上海康威特吉能源技术有限公司 | Distributed type tandem photovoltaic grid connected power generation system and current sampling correcting method |
| CN105634295A (en) * | 2016-01-27 | 2016-06-01 | 深圳慧能泰半导体科技有限公司 | Current sampling circuit and current sampling system for totem-pole bridgeless circuit |
| CN106249803A (en) * | 2016-09-30 | 2016-12-21 | 上海空间电源研究所 | Solaode power control circuit based on MPPT |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055942A (en) * | 1998-08-04 | 2000-02-25 | Fuji Electric Co Ltd | Method for detecting current of power converter |
-
2017
- 2017-04-01 CN CN201710211470.6A patent/CN106885933B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378602A (en) * | 2012-04-20 | 2013-10-30 | 上海康威特吉能源技术有限公司 | Distributed type tandem photovoltaic grid connected power generation system and current sampling correcting method |
| CN102946199A (en) * | 2012-11-09 | 2013-02-27 | 联合汽车电子有限公司 | Direct current insulation buck converter and matrix voltage detection circuit thereof |
| CN105634295A (en) * | 2016-01-27 | 2016-06-01 | 深圳慧能泰半导体科技有限公司 | Current sampling circuit and current sampling system for totem-pole bridgeless circuit |
| CN106249803A (en) * | 2016-09-30 | 2016-12-21 | 上海空间电源研究所 | Solaode power control circuit based on MPPT |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106885933A (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112087061B (en) | Three-coil battery wireless charging system capable of automatically switching constant current and constant voltage | |
| CN103166489B (en) | A kind of control circuit of Three-Phase SVPWM Rectifier | |
| CN207518331U (en) | A kind of onboard charger based on LLC half bridge resonant | |
| CN103414334B (en) | PF is the long-life DCM Boost pfc converter of 1 | |
| CN105226916A (en) | The current sample method of isolated power converters and sampling apparatus | |
| CN102522899A (en) | Control circuit of double-tube forward power converter and control method thereof | |
| CN104871421A (en) | Single-pole switch power source | |
| CN113179024B (en) | Discrete iteration prediction control model of three-phase-shift double-active full-bridge direct-current converter | |
| CN104779790A (en) | Switched inductance quasi-Z source DC-DC converter circuit | |
| CN103412181B (en) | For the inductive current zero cross detection circuit that boost power factor corrects | |
| CN103138557B (en) | The trailing edge method of sampling of inductive current in H bridge PFC circuits and the circuit | |
| CN104716836A (en) | Control circuit and method for switching power converter | |
| CN102904466A (en) | Switching power supply controller | |
| CN204442169U (en) | Switch power controller and comprise the Switching Power Supply of this switch power controller | |
| CN201839199U (en) | Bridgeless power factor correcting circuit | |
| CN100530923C (en) | Single-phase and triple-phase impedance source booster and step-down DC/DC converter | |
| CN205319941U (en) | Double - circuit voltage conversion control chip , double - circuit voltage conversion ware and electronic electric energy meter | |
| CN203151389U (en) | Control circuit of three-phase high power factor rectifier | |
| CN203911763U (en) | Digital power supply suitable for CPU | |
| CN203465347U (en) | Inductive current zero crossing detection circuit applied to boost power factor correction | |
| CN108199590A (en) | A kind of high frequency switch power | |
| CN106885933B (en) | A kind of current sampling circuit suitable for Superbuck converter | |
| CN208782994U (en) | Low-power consumption power supply circuit for NB-IoT communication module | |
| CN106771502A (en) | A kind of circuit and method for improving source current overload protection ability | |
| CN207321130U (en) | Novel switch power circuit and its manufactured measuring instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |