CN111030460A - High-voltage output converter - Google Patents
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- CN111030460A CN111030460A CN201911213203.8A CN201911213203A CN111030460A CN 111030460 A CN111030460 A CN 111030460A CN 201911213203 A CN201911213203 A CN 201911213203A CN 111030460 A CN111030460 A CN 111030460A
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- 238000004804 winding Methods 0.000 claims abstract description 45
- 230000005284 excitation Effects 0.000 claims abstract description 9
- 230000000295 complement effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
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- 230000003071 parasitic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention provides a high-voltage output converter, which adopts a forward and reverse excitation circuit and comprises an input positive end, an input negative end, a transformer TX1, an MOS tube Q1, an MOS tube Q2, a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an output positive end and an output negative end, wherein the connection relation is that the input positive end, the primary winding dotted end of the transformer TX1, and the drain electrode of the MOS tube Q1 are sequentially connected with the input negative end; the capacitor C2 and the MOS tube Q2 are connected in series and then connected in parallel at two ends of the primary winding; the different-name end of the secondary winding of the transformer TX1, diodes D1 and D3 are connected in series with the positive output end, the negative output end, the diode D2 and the same-name end of the secondary winding of the transformer TX1 are sequentially connected in series, a capacitor C1 is connected in parallel between the cathode of the diode D1 and the same-name end of the secondary winding of the transformer TX1, a capacitor C2 is connected in parallel between the different-name end of the secondary winding of the transformer TX1 and the anode of the diode D2, and a capacitor C3 is connected in parallel between the positive output end and the negative output end. The invention can realize high-voltage output and ensure that the main power realizes ZVS within the full load range.
Description
Technical Field
The present invention relates to a converter circuit, and more particularly, to a high voltage output converter.
Background
In the field of switching power supply applications, there are many occasions where a high voltage output power supply is required: during high-voltage direct-current transmission, a power supply end is required to increase voltage; in medical X-ray machines, the tube needs to operate under a high voltage electric field; in the application of industrial electrostatic dust collection, if a flyback basic topology is adopted to apply high-voltage direct current … … between a discharge electrode and a dust collecting electrode in the field of outputting high voltage, the purpose of high output voltage can be achieved by increasing the voltage in a multi-winding mode or forming multi-stage voltage-multiplying rectification through a capacitor and a diode, but the methods have certain limitations.
The mode of multi-winding rectification and then series output is adopted, namely a plurality of flyback outputs are connected in series, the higher the output voltage is, the more windings are needed, the requirement on the volume of the transformer is a challenge, and in addition, as the windings are more, the coupling is not good, the leakage inductance energy is all consumed, and the efficiency is not high; in addition, the MOS tube on the primary side of the converter does not realize ZVS, which is not beneficial to high frequency.
Both flyback and forward circuits have their own advantages: the flyback circuit only needs one power tube, does not need an output inductor and has a simple structure; the forward circuit can directly transmit energy and has high efficiency. Because the polarities of the forward circuit and the flyback circuit on the secondary side of the transformer are opposite, the forward circuit and the flyback circuit cannot be simply and directly combined together, and devices need to be added on the secondary side, so that the final output polarities of the forward circuit and the flyback circuit are consistent, and the output can normally work. The prior art discloses a specific circuit topology structure of a flyback circuit, as shown in fig. 1. The scheme adopts two working processes of forward excitation and flyback excitation, and compared with an independent flyback scheme, the scheme increases the working process of forward excitation, improves the working efficiency to a certain extent, but still does not solve the problems of leakage inductance energy and ZVS.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to overcome the shortcomings of the existing methods, and to provide a high voltage output converter, which can improve the energy transmission efficiency of the switching power supply circuit at the time of high voltage output, and provide related control schemes, so that the high efficiency can be maintained under different loads.
The high-voltage output converter comprises an input positive terminal, an input negative terminal, a transformer TX1, an MOS tube Q1, an MOS tube Q2, a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an output positive terminal and an output negative terminal, wherein the connection relations are as follows:
the positive end of an input is electrically connected with the dotted terminal of a primary winding P1 of a transformer TX1, the different-name terminal of a primary winding P1 of the transformer TX1 is electrically connected with the drain of a MOS tube Q1, the source of a MOS tube Q1 is electrically connected with the negative end of the input, the drain of a MOS tube Q1 is also electrically connected with the source of a MOS tube Q2, the drain of a MOS tube Q2 is electrically connected with the positive end of a capacitor C4, the negative end of a capacitor C4 is electrically connected with the positive end of the input, the different-name terminal of a secondary winding S1 of the transformer TX1 is electrically connected with the anode of a diode D1, the cathode of the diode D1 is electrically connected with the positive end of the capacitor C1, the negative end of the capacitor C1 is electrically connected with the dotted terminal of a secondary winding S1 of the transformer TX1, the different-name terminal of the secondary winding S1 of the transformer TX1 is also electrically connected with the positive end of the capacitor C1, the negative end of the diode C1 is electrically connected with the anode S1 of the diode TX1, and the diode D1 is also electrically connected with the anode of, the cathode of the diode D3 is electrically connected to the positive terminal of the capacitor C3, the negative terminal of the capacitor C3 is electrically connected to the negative terminal of the capacitor C2, the positive terminal of the capacitor C3 is also electrically connected to the positive output terminal, and the negative terminal of the capacitor C3 is also electrically connected to the negative output terminal.
Compared with the traditional scheme, the high-voltage output converter is additionally provided with the MOS transistor Q2 and the capacitor C4 for absorbing leakage inductance energy.
The high-voltage output converter circuit has two control modes, when the load is heavy, MOS tube complementary control is adopted, the control is simple, ZVS can be realized, and the complementary control can reduce the conduction time of a parasitic diode of the MOS tube, so that the loss is reduced; under the condition of half load, non-complementary control is adopted, so that under the condition of ensuring that ZVS is realized, the amplitude of reverse excitation can be reduced, the magnetic swing amplitude is reduced, and the iron loss of the transformer is reduced.
The scheme provided by the high-voltage output converter not only realizes the basic function of high-voltage output, but also overcomes the defects of the existing scheme, and compared with the existing scheme, the high-voltage output converter has the following advantages:
1. the scheme provided can absorb the energy of leakage inductance and improve the transmission efficiency.
2. The scheme provided can realize ZVS of the primary side main MOS tube, reduce the switching loss and facilitate high frequency.
3. The scheme provided can reduce reverse current under half-load light load under the condition that the main MOS tube realizes ZVS, and is favorable for reducing the power consumption of the light load.
Drawings
FIG. 1 is a schematic diagram of a conventional flyback circuit;
FIG. 2 is a schematic diagram of an active clamp flyback circuit of the high-voltage output converter according to the first embodiment of the present invention;
FIG. 3 is a graph showing the operation curves of the high-voltage output converter in complementary control according to the first embodiment of the present invention;
FIG. 4 is a graph illustrating the operation of the first embodiment of the present invention when the high voltage output converter is not complementarily controlled;
fig. 5 is a circuit schematic of a second embodiment of a high voltage output converter in accordance with the present invention.
Detailed Description
The invention provides a voltage output converter, which can realize ZVS in a full load range and improve the energy transmission efficiency of a switching power supply circuit under the condition of ensuring high-voltage output.
First embodiment
Fig. 2 is a schematic diagram of a first embodiment of a switching converter power stage of a high voltage output converter according to the present invention, which is connected as follows:
the positive end of an input is electrically connected with the dotted terminal of a primary winding P1 of a transformer TX1, the different-name terminal of a primary winding P1 of the transformer TX1 is electrically connected with the drain of a MOS tube Q1, the source of a MOS tube Q1 is electrically connected with the negative end of the input, the drain of a MOS tube Q1 is also electrically connected with the source of a MOS tube Q2, the drain of a MOS tube Q2 is electrically connected with the positive end of a capacitor C4, the negative end of a capacitor C4 is electrically connected with the positive end of the input, the different-name terminal of a secondary winding S1 of the transformer TX1 is electrically connected with the anode of a diode D1, the cathode of the diode D1 is electrically connected with the positive end of the capacitor C1, the negative end of the capacitor C1 is electrically connected with the dotted terminal of a secondary winding S1 of the transformer TX1, the different-name terminal of the secondary winding S1 of the transformer TX1 is also electrically connected with the positive end of the capacitor C1, the negative end of the diode C1 is electrically connected with the anode S1 of the diode TX1, and the diode D1 is also electrically connected with the anode of, the cathode of the diode D3 is electrically connected to the positive terminal of the capacitor C3, the negative terminal of the capacitor C3 is electrically connected to the negative terminal of the capacitor C2, the positive terminal of the capacitor C3 is also electrically connected to the positive output terminal, and the negative terminal of the capacitor C3 is also electrically connected to the negative output terminal. In the present embodiment, the resistor R1 represents a load, the upper end of the resistor R1 is an output positive terminal, and the lower end of the resistor R1 is an output negative terminal.
The following power level parameters were simulated: an input voltage is 5V, a capacitor C4 is 1.22uF, a transformer excitation inductor is 5uH, a leakage inductor is 100nH, a turn ratio is 1:1, a capacitor C1, a capacitor C2 and a capacitor C3 are all 10uF, the driving frequency of an MOS tube is 300kHz, the duty ratio of the MOS tube Q1 is 50%, a load resistor is 500 omega, complementary control and non-complementary control are respectively adopted, and obtained working curves are shown in the figures 3 and 4, wherein Vg1 represents the driving of the MOS tube Q1, Vg2 represents the driving of the MOS tube Q2, Vds1 represents the drain-source voltage of the MOS tube Q1, Vcr represents the voltage of the capacitor C4, Ir represents the current of the primary side of the transformer, and Vo represents an output voltage.
If complementary control is adopted, the working curve of the high-voltage output converter of the invention is shown in fig. 3, and the working process of the embodiment is as follows:
stage one: at the stage t0-t1, the MOS transistor Q1 is turned on, the MOS transistor Q2 is turned off, the diode D1 is turned off, the diode D2 is turned off, and the diode D3 is turned on. In the stage, the transformer is excited, the primary side current rises, and a foundation is provided for ZVS of the MOS tube Q2. The homonymous terminal voltage of the transformer is positive, the heteronymous terminal voltage of the transformer is negative, and the capacitor C1, the secondary winding S2 of the transformer TX1 and the capacitor C2 are connected in series to provide current for an output load. The stage is a flyback energy storage stage, the input end stores energy into the transformer, meanwhile, the stage is also a forward energy transmission stage, the input end directly transmits the energy to the output through the transformer, and the loss is greatly reduced because the energy is directly transmitted and no intermediate energy storage link exists;
and a second stage: at the stage t1-t2, the MOS transistor Q1 is turned off, the MOS transistor Q2 is turned on, the diode D1 is turned on, the diode D2 is turned on, and the diode D3 is turned off. In the stage, the transformer is demagnetized, the end voltage of the transformer with different name is positive, the capacitor C4 resonates with the leakage inductance of the transformer, the primary current of the transformer changes from positive to negative to provide a foundation for ZVS of the MOS transistor Q1, and the exciting current of the transformer charges the capacitor C1 and the capacitor C2. The stage is a flyback energy releasing stage, the transformer releases the energy stored in the previous stage to the output end to provide energy for output, and meanwhile, the stage is a forward demagnetizing stage, and the magnetic flux of the transformer is reduced, so that the transformer is not saturated.
For half-load or light-load, in the conventional flyback circuit, the light-load efficiency is usually improved by reducing the switching frequency, so for the switching converter, it is generally thought that the efficiency is improved by changing the control frequency, for example, the control chip which is popular nowadays is used for improving the efficiency of half-load by changing the frequency. The invention does not adopt the conventional method for changing the frequency, changes the control mode of the two tubes from the complementary control of full load to the non-complementary control of half load or light load, and reduces the conduction time of the clamping tube by opening a clamping tube before the main power tube is opened, thereby reducing the amplitude of reverse current and improving the efficiency of half load or light load. If non-complementary control is adopted, the working curve is as shown in fig. 4, the drive of the MOS transistor Q2 and the drive of the MOS transistor Q1 are not complementary, the MOS transistor Q2 is turned on for a short time before the MOS transistor Q1 is turned on, and then the MOS transistor Q1 is turned on. The operation of the high-voltage output converter of this embodiment is as follows:
stage one: at the stage t0-t1, the MOS transistor Q1 is turned on, the MOS transistor Q2 is turned off, the diode D1 is turned off, the diode D2 is turned off, and the diode D3 is turned on. In the stage, the transformer is excited, the primary side current rises, the voltage at the same name end of the transformer is positive, the voltage at the different name end of the transformer is negative, and the capacitor C1, the secondary winding S2 of the transformer TX1 and the capacitor C2 are connected in series to provide current for an output load;
and a second stage: at the stage t1-t2, the MOS transistor Q1 is turned off, the MOS transistor Q2 is turned off, the diode D1 is turned on, the diode D2 is turned on, and the diode D3 is turned off. The stage of exciting current drops, Vds of the MOS transistor Q1 is clamped by the capacitor C4, and the exciting current charges the capacitor C1 and the capacitor C2. When the exciting current drops to 0, the secondary side diodes are all cut off, and the stage is finished.
And a third stage: at the stage t2-t3, the MOS transistor Q1 is turned off, the MOS transistor Q2 is turned off, the diode D1 is turned off, the diode D2 is turned off, and the diode D3 is turned off. At this stage, the excitation inductance and the parasitic capacitance of the MOS transistor oscillate, and Vds of the MOS transistor Q1 is in an oscillating state. During this phase, the primary current is maintained at a small amplitude oscillation around 0.
And a fourth stage: at the stage t3-t4, the MOS transistor Q1 is turned off, the MOS transistor Q2 is turned on, the diode D1 is turned off, the diode D2 is turned off, and the diode D3 is turned off. In the stage, the transformer is excited in a reverse direction, the voltage of the synonym terminal of the transformer is positive, the primary current of the transformer is changed from 0 to negative, and a foundation is provided for ZVS of an MOS transistor Q1.
From the above working process, after the MOS transistor Q1 is turned off, the current on the primary side does not decrease all the time, but remains at 0 th level in the third stage, so that the effective value and peak-to-peak value of the current on the primary side of the transformer can be effectively reduced, the winding loss of the transformer and the loss of the magnetic core can be reduced, and the power consumption can be kept low when the load is light.
Therefore, the high-voltage output converter can realize high-voltage output, can absorb the energy of leakage inductance of the transformer, ensures that the main power realizes ZVS in a full-load range, is favorable for realizing high frequency, and effectively reduces reverse current through non-complementary control during half-load light load so as to reduce the loss of the converter and ensure that the converter is always in a low-power consumption state.
Second embodiment
Fig. 5 is a circuit schematic of a second embodiment of a high voltage output converter in accordance with the present invention. In contrast to the first embodiment, the clamp circuit formed by the MOS transistor and the capacitor is not connected to the primary winding of the transformer, but to the auxiliary winding. Because the clamping tube is connected to the auxiliary winding, the source voltage of the clamping tube can be fixed, a bootstrap driving circuit is not needed, and a conventional circuit (such as a totem-pole circuit) can be used for driving, so that the driving circuit is simplified.
The connection relationship of this embodiment is as follows:
the positive input end of the transformer TX1 is electrically connected with the dotted terminal of the primary winding P1 of the transformer TX1, the different-name terminal of the primary winding P1 of the transformer TX1 is electrically connected with the drain of the MOS tube Q1, the source of the MOS tube Q1 is electrically connected with the negative input end, the different-name terminal of the secondary winding S1 of the transformer TX1 is electrically connected with the anode of the diode D1, the cathode of the diode D1 is electrically connected with the positive terminal of the capacitor C1, the negative terminal of the capacitor C1 is electrically connected with the dotted terminal of the secondary winding S1 of the transformer TX1, the different-name terminal of the secondary winding S1 of the transformer TX1 is also electrically connected with the positive terminal of the capacitor C1, the negative terminal of the capacitor C1 is electrically connected with the anode of the diode D1, the cathode of the diode D1 is electrically connected with the positive terminal of the capacitor C1, the cathode of the capacitor TX1 is electrically connected with the negative terminal of the capacitor TX1, and the output terminal of the capacitor C1 is electrically connected with the capacitor TX 1. The negative end of the capacitor C3 is also electrically connected with the output negative end, the dotted end of the auxiliary winding S2 of the transformer TX1 is electrically connected with the negative end of the capacitor C24, the positive end of the capacitor C24 is electrically connected with the drain of the MOS transistor Q22, and the source of the MOS transistor Q22 is electrically connected with the dotted end of the auxiliary winding S2 of the transformer TX 1.
The operation of the high voltage output converter of this embodiment is the same as that of the first embodiment, and will not be described herein.
The above are merely preferred embodiments of the present invention, and those skilled in the art to which the present invention pertains may make variations and modifications of the above-described embodiments. Therefore, the present invention is not limited to the specific control modes disclosed and described above, and modifications and variations of the present invention are also intended to fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (4)
1. A high voltage output converter, characterized by: the forward and reverse excitation circuit comprises an input positive terminal, an input negative terminal, a transformer TX1, an MOS tube Q1, an MOS tube Q2, a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an output positive terminal and an output negative terminal, and the connection relationship is as follows: the positive end of an input is electrically connected with the dotted terminal of a primary winding P1 of a transformer TX1, the different-name terminal of a primary winding P1 of the transformer TX1 is electrically connected with the drain of a MOS tube Q1, the source of a MOS tube Q1 is electrically connected with the negative end of the input, the drain of a MOS tube Q1 is also electrically connected with the source of a MOS tube Q2, the drain of a MOS tube Q2 is electrically connected with the positive end of a capacitor C4, the negative end of a capacitor C4 is electrically connected with the positive end of the input, the different-name terminal of a secondary winding S1 of the transformer TX1 is electrically connected with the anode of a diode D1, the cathode of the diode D1 is electrically connected with the positive end of the capacitor C1, the negative end of the capacitor C1 is electrically connected with the dotted terminal of a secondary winding S1 of the transformer TX1, the different-name terminal of the secondary winding S1 of the transformer TX1 is also electrically connected with the positive end of the capacitor C1, the negative end of the diode C1 is electrically connected with the anode S1 of the diode TX1, and the diode D1 is also electrically connected with the anode of, the cathode of the diode D3 is electrically connected to the positive terminal of the capacitor C3, the negative terminal of the capacitor C3 is electrically connected to the negative terminal of the capacitor C2, the positive terminal of the capacitor C3 is also electrically connected to the positive output terminal, and the negative terminal of the capacitor C3 is also electrically connected to the negative output terminal.
2. The high-voltage output converter according to claim 1, wherein: the high-voltage output converter has two control modes, and when the load is heavy, the MOS tube is adopted for complementary control; below half load, non-complementary control is employed.
3. A high voltage output converter, characterized by: the forward and reverse excitation circuit comprises an input positive terminal, an input negative terminal, a transformer TX1, an MOS tube Q1, an MOS tube Q22, a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C24, an output positive terminal and an output negative terminal, and the connection relationship is as follows: the positive input end of the transformer TX1 is electrically connected with the dotted terminal of the primary winding P1 of the transformer TX1, the different-name terminal of the primary winding P1 of the transformer TX1 is electrically connected with the drain of the MOS tube Q1, the source of the MOS tube Q1 is electrically connected with the negative input end, the different-name terminal of the secondary winding S1 of the transformer TX1 is electrically connected with the anode of the diode D1, the cathode of the diode D1 is electrically connected with the positive terminal of the capacitor C1, the negative terminal of the capacitor C1 is electrically connected with the dotted terminal of the secondary winding S1 of the transformer TX1, the different-name terminal of the secondary winding S1 of the transformer TX1 is also electrically connected with the positive terminal of the capacitor C1, the negative terminal of the capacitor C1 is electrically connected with the anode of the diode D1, the cathode of the diode D1 is electrically connected with the positive terminal of the capacitor C1, the cathode of the capacitor TX1 is electrically connected with the negative terminal of the capacitor TX1, and the output terminal of the capacitor TX1 is also electrically connected with the capacitor C1. The negative end of the capacitor C3 is also electrically connected with the output negative end, the dotted end of the auxiliary winding S2 of the transformer TX1 is electrically connected with the negative end of the capacitor C24, the positive end of the capacitor C24 is electrically connected with the drain of the MOS transistor Q22, and the source of the MOS transistor Q22 is electrically connected with the dotted end of the auxiliary winding S2 of the transformer TX 1.
4. The high-voltage output converter according to claim 3, wherein: the high-voltage output converter has two control modes, and when the load is heavy, the MOS tube is adopted for complementary control; below half load, non-complementary control is employed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911213203.8A CN111030460A (en) | 2019-12-02 | 2019-12-02 | High-voltage output converter |
| PCT/CN2020/128672 WO2021109837A1 (en) | 2019-12-02 | 2020-11-13 | High-voltage output converter |
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| CN201911213203.8A CN111030460A (en) | 2019-12-02 | 2019-12-02 | High-voltage output converter |
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| CN111030460A true CN111030460A (en) | 2020-04-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021109837A1 (en) * | 2019-12-02 | 2021-06-10 | 广州金升阳科技有限公司 | High-voltage output converter |
| CN116054591A (en) * | 2023-03-06 | 2023-05-02 | 苏州锴威特半导体股份有限公司 | Forward output adjustable resonant circuit |
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| WO2021109837A1 (en) * | 2019-12-02 | 2021-06-10 | 广州金升阳科技有限公司 | High-voltage output converter |
| CN116054591A (en) * | 2023-03-06 | 2023-05-02 | 苏州锴威特半导体股份有限公司 | Forward output adjustable resonant circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021109837A1 (en) | 2021-06-10 |
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Application publication date: 20200417 |