CN220382944U - Soft-open Boost converter for high-voltage high-current output - Google Patents
Soft-open Boost converter for high-voltage high-current output Download PDFInfo
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- CN220382944U CN220382944U CN202321119287.0U CN202321119287U CN220382944U CN 220382944 U CN220382944 U CN 220382944U CN 202321119287 U CN202321119287 U CN 202321119287U CN 220382944 U CN220382944 U CN 220382944U
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- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a soft-on Boost converter for high-voltage high-current output, which comprises a main power loop, wherein the main power loop comprises a direct-current power supply, a Boost inductor and a main MOS (metal oxide semiconductor) tube which are connected in series, an input side of the main power loop is connected with an input capacitor in parallel, an output side of the main power loop is connected with an output capacitor and a load in parallel, the main power loop is also connected with a resonant loop in series, the resonant loop comprises a resonant inductor, a resonant capacitor and a clamping MOS tube which is matched with the main MOS tube and is turned on and off in a staggered manner through dead time delay, the resonant inductor, the resonant capacitor and the clamping MOS tube are connected in series, a parasitic body diode exists in the clamping MOS tube, and a parasitic body diode exists in the main MOS tube; a power diode is arranged between the main power loop and the output capacitor; the Coss loss and the turn-on loss of the MOS tube of the Boost converter are reduced to zero, the Boost converter is suitable for high output voltage, the reliability of the circuit is high, and the switching frequency is improved.
Description
Technical Field
The utility model relates to the technical field of power electronic converters, in particular to a soft-on Boost converter for high-voltage and high-current output.
Background
The Boost circuit topology in the prior art is shown in fig. 1, and is composed of an input capacitor C1, a Boost inductor L1, a main power MOS transistor Q1, a Boost diode D2 and an output capacitor C4. R1 is the load of the circuit; c2 and D1 are the parasitic capacitance of Q1 and the body diode;
when the MOS tube Q1 is turned on, the current of the inductor L1 linearly rises, the diode D2 is turned off, the output is maintained by the capacitor C4, when the MOS tube is turned off, the diode D2 freewheels, the inductor and the input source simultaneously charge the capacitor C4 and provide energy for a load, the current of the inductor linearly drops, and if the current of the inductor can drop to 0 during the freewheeling of the diode, the current of the inductor is intermittent or critical. If the inductor current does not drop to 0 in the follow current period of the diode, the inductor current is continuous, and when the next conduction period of the MOS tube arrives, the reverse recovery current of the diode can flow through the MOS tube, so that the turn-on loss of the MOS tube is increased.
The output voltage is high, the single Boost circuit topology has large Coss loss and switching loss of the MOS tube, and the heat is concentrated, so that the high frequency of the converter is affected, and the size of the converter cannot be miniaturized.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a soft-on Boost converter for high-voltage and high-current output, which reduces the Coss loss and the on loss of an MOS tube of the soft-on Boost converter for high-voltage and high-current output to zero, is suitable for high-output voltage, has high reliability of a circuit, improves the switching frequency, and has smaller volume under the condition of the same power.
In order to solve the technical problems, the utility model provides a soft-on Boost converter for high-voltage high-current output, which comprises a main power loop, wherein the main power loop comprises a direct-current power supply, a Boost inductor L1 and a main MOS tube Q1 which are connected in series, an input side of the main power loop is connected with an input capacitor C3 in parallel, an output side of the main power loop is connected with an output capacitor C5 and a load R1 in parallel, the main power loop is also connected with a resonant loop in series, the resonant loop comprises a resonant inductor L2, a resonant capacitor C4 and a clamping MOS tube Q2 which is matched with the main MOS tube Q1 and is turned off and on in a staggered manner through dead time delay, the resonant inductor L2, the resonant capacitor C4 and the clamping MOS tube Q2 are connected in series, the clamping MOS tube Q2 parasitizes a body diode D2, and the main MOS tube Q1 parasitizes a body diode D1; a power diode D3 is arranged between the main power loop and the output capacitor C5.
Preferably, the input end of the boost inductor L1 is connected with the positive end of the dc power supply and one end of the input capacitor C3, the output end of the boost inductor L1 is connected with one end of the resonant inductor L2, and is characterized in that the D end of the boost inductor L1 is connected with the input end of the power diode D3, the output end of the power diode D3 is connected with one end of the output capacitor C5 and one end of the load R1, the S end of the clamping MOS transistor Q2 is connected with one end of the resonant capacitor C4, the other end of the resonant inductor L2 and the D end of the main MOS transistor Q1 are connected together, and the S end of the main MOS transistor Q1 is connected with the negative end of the dc power supply, the other end of the input capacitor C3 and the other end of the output capacitor C5.
Preferably, the clamp MOS transistor Q2 is parasitic with a parasitic capacitance C2, and the main MOS transistor Q1 is parasitic with a parasitic capacitance C1.
Preferably, the two ends of the parasitic capacitor C1 of the main MOS transistor Q1 are further connected in parallel with a first voltage detection device for detecting the voltage at the two ends of the parasitic capacitor C1.
Preferably, two ends of the parasitic capacitor C2 of the clamping MOS transistor Q2 are further connected in parallel with a second voltage detection device for detecting voltages at two ends of the parasitic capacitor C2.
After the structure is adopted, the soft-on Boost converter for high-voltage high-current output comprises a main power loop, wherein the main power loop comprises a direct-current power supply, a Boost inductor L1 and a main MOS tube Q1 which are connected in series, an input side of the main power loop is connected with an input capacitor C3 in parallel, an output side of the main power loop is connected with an output capacitor C5 and a load R1 in parallel, the main power loop is also connected with a resonant loop in series, the resonant loop comprises a resonant inductor L2, a resonant capacitor C4 and a clamping MOS tube Q2 which is matched with the main MOS tube Q1 and is subjected to staggered turn-off and turn-on through dead time delay, the resonant inductor L2, the resonant capacitor C4 and the clamping MOS tube Q2 are connected in series, the clamping MOS tube Q2 is parasitic with a body diode D2, and the main MOS tube Q1 is parasitic with a body diode D1; a power diode D3 is arranged between the main power loop and the output capacitor; the loss of Coss and the turn-on loss of the MOS tube of the soft-on Boost converter for high-voltage and high-current output are reduced to zero, the soft-on Boost converter is suitable for high-output voltage, the reliability of a circuit is high, the switching frequency is improved, and the size of the circuit is smaller under the condition of the same power.
Drawings
FIG. 1 is a block diagram of a prior art Boost converter;
FIG. 2 is an overall block diagram of a soft-on Boost converter for high voltage high current output according to the present utility model.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the application clearer and more obvious, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
Referring to fig. 2, fig. 2 is an overall structure diagram of a soft-on Boost converter for high voltage and high current output according to the present utility model;
the embodiment discloses a soft-on Boost converter for high-voltage high-current output, which comprises a main power loop 10, wherein the main power loop 10 comprises a direct-current power supply, a Boost inductor L1 and a main MOS tube Q1 which are connected in series, an input side of the main power loop 10 is connected with an input capacitor C3 in parallel, an output side of the main power loop 10 is connected with an output capacitor C5 and a load R1 in parallel, the main power loop 10 is also connected with a resonant loop 20 in series, the resonant loop 20 comprises a resonant inductor L2, a resonant capacitor C4 and a clamping MOS tube Q2 which is matched with the main MOS tube Q1 and is turned off and on in a staggered manner through dead time delay, the resonant inductor L2, the resonant capacitor C4 and the clamping MOS tube Q2 are connected in series, the clamping MOS tube Q2 is parasitic with a body diode D2, and the main MOS tube Q1 is parasitic with a body diode D1; a power diode D3 is arranged between the main power loop and the output capacitor C5.
When the main MOS transistor Q1 is turned on, the current of the main power inductor L1 and the resonance inductor L2 linearly rises, the MOS transistor Q2 and the diode D3 are turned off, and the output is maintained by the capacitor C5.
When the main MOS transistor Q1 is turned off, the inductor current cannot be suddenly changed, the power inductor L1 freewheels through D3, and at the moment, the inductor L1 and the input source charge the capacitor C5 and provide energy for the load at the same time, and the inductor current linearly decreases. Before the clamping MOS transistor Q2 is turned on, the resonant inductor L2 performs sinusoidal oscillation through the body diode of the clamping MOS transistor Q2 and the resonant capacitor C4, so that the turning on of the clamping MOS transistor Q2 is 0 voltage turning on.
When the energy of the resonant inductor L2 is completely transferred to the resonant capacitor C4, the clamping MOS transistor Q2 is not turned off, and then the energy of the C4 is transferred to the L2 again, and the current direction of the L2 is opposite to the original current direction. When the energy of C4 is completely transferred, the voltage at two ends of C4 is 0, and the clamping MOS transistor Q2 is turned off.
After the clamping MOS transistor Q2 is turned off, the resonant inductor L2 transfers energy to the load and the output capacitor C5 through the main power diode D3 and the body diode D1 of the main MOS transistor Q1 because the current of the resonant inductor L2 cannot be suddenly changed, and the main MOS transistor Q1 is turned on before the energy of the L2 is released, so that the soft-on of the main MOS transistor Q1 is realized.
Example two
In this embodiment, the input end of the boost inductor L1 is connected to the positive end of the dc power supply and one end of the input capacitor C3, the output end of the boost inductor L1 is connected to one end of the resonant inductor L2, and the input end of the power diode D3, the output end of the power diode D3 is connected to one end of the output capacitor C5 and one end of the load R1, the S end of the clamping MOS transistor Q2 is connected to one end of the resonant capacitor C4, the other end of the resonant inductor L2 and the D end of the main MOS transistor Q1 are connected together, and the S end of the main MOS transistor Q1 is connected to the negative end of the dc power supply, the other end of the input capacitor C3 and the other end of the output capacitor C5.
Example III
The present embodiment is based on the first embodiment, in this embodiment, the clamp MOS transistor Q2 is parasitic with a parasitic capacitance C2, and the main MOS transistor Q1 is parasitic with a parasitic capacitance C1.
Example IV
In this embodiment, the two ends of the parasitic capacitor C1 of the main MOS transistor Q1 are further connected in parallel with a first voltage detection device for detecting the voltage across the parasitic capacitor C1;
the two ends of the parasitic capacitor C2 of the clamping MOS tube Q2 are also connected in parallel with a second voltage detection device for detecting the voltage at the two ends of the parasitic capacitor C2.
The loss of Coss and the turn-on loss of the MOS tube of the soft-on Boost converter for high-voltage and high-current output are reduced to zero, the soft-on Boost converter is suitable for high-output voltage, the reliability of a circuit is high, the switching frequency is improved, and the size of the circuit is smaller under the condition of the same power.
The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the present application shall fall within the scope of the claims of the present application.
Claims (5)
1. The soft-on Boost converter for high-voltage high-current output is characterized by comprising a main power loop, wherein the main power loop comprises a direct-current power supply, a Boost inductor L1 and a main MOS tube Q1 which are connected in series, an input side of the main power loop is connected with an input capacitor C3 in parallel, an output side of the main power loop is connected with an output capacitor C5 and a load R1 in parallel, the main power loop is further connected with a resonant loop in series, the resonant loop comprises a resonant inductor L2, a resonant capacitor C4 and a clamping MOS tube Q2 which is matched with the main MOS tube Q1 and is turned off and on in a staggered mode through dead time delay, the resonant inductor L2, the resonant capacitor C4 and the clamping MOS tube Q2 are connected in series, the clamping MOS tube Q2 is parasitic with a body diode D2, and the main MOS tube Q1 is parasitic with a body diode D1; a power diode D3 is arranged between the main power loop and the output capacitor C5.
2. The soft-on Boost converter for high-voltage and high-current output according to claim 1, wherein the input end of the Boost inductor L1 is connected to the positive end of the dc power supply and one end of the input capacitor C3, the output end of the Boost inductor L1 is connected to one end of the resonant inductor L2, the output end of the power diode D3 is connected to one end of the output capacitor C5 and one end of the load R1, the S end of the clamp MOS transistor Q2 is connected to one end of the resonant capacitor C4, the other end of the resonant inductor L2 and the D end of the main MOS transistor Q1 are connected together, and the S end of the main MOS transistor Q1 is connected to the negative end of the dc power supply, the other end of the input capacitor C3 and the other end of the output capacitor C5.
3. The soft-on Boost converter for high voltage high current output of claim 1, wherein the clamp MOS transistor Q2 is parasitic with a parasitic capacitance C2 and the main MOS transistor Q1 is parasitic with a parasitic capacitance C1.
4. The soft-on Boost converter for high-voltage high-current output according to claim 3, wherein the two ends of the parasitic capacitor C1 of the main MOS transistor Q1 are further connected in parallel with a first voltage detection device for detecting voltages across the parasitic capacitor C1.
5. The soft-on Boost converter for high voltage and high current output according to claim 3, wherein the two ends of the parasitic capacitor C2 of the clamping MOS transistor Q2 are further connected in parallel with a second voltage detection device for detecting voltages across the parasitic capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321119287.0U CN220382944U (en) | 2023-05-10 | 2023-05-10 | Soft-open Boost converter for high-voltage high-current output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321119287.0U CN220382944U (en) | 2023-05-10 | 2023-05-10 | Soft-open Boost converter for high-voltage high-current output |
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| Publication Number | Publication Date |
|---|---|
| CN220382944U true CN220382944U (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321119287.0U Active CN220382944U (en) | 2023-05-10 | 2023-05-10 | Soft-open Boost converter for high-voltage high-current output |
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| Country | Link |
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| CN (1) | CN220382944U (en) |
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2023
- 2023-05-10 CN CN202321119287.0U patent/CN220382944U/en active Active
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