CN207251570U - A kind of soft switch circuit - Google Patents
A kind of soft switch circuit Download PDFInfo
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- CN207251570U CN207251570U CN201721200116.5U CN201721200116U CN207251570U CN 207251570 U CN207251570 U CN 207251570U CN 201721200116 U CN201721200116 U CN 201721200116U CN 207251570 U CN207251570 U CN 207251570U
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Abstract
The utility model embodiment discloses a kind of soft switch circuit, wherein the soft switch circuit rises suppressor using the first metal-oxide-semiconductor of discrete component, the second metal-oxide-semiconductor, first voltage, second voltage rises suppressor, commutation controller, power slot and power output interface and forms., can be by rising suppressor and second voltage rising suppressor reduction circuit turn-off power loss with the first voltage of paralleled power switches using the utility model.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a soft switch circuit.
Background
In the field of electronic technology, switching circuits are widely used, and mainly include hard switching circuits and soft switching circuits. Wherein, the hard switching circuit is gradually replaced by the soft switching circuit with smaller switching loss due to larger switching loss. In the prior art, in order to suppress the voltage rising rate when the soft switching circuit is turned off, a larger capacitor is connected in parallel with the switching tube, so that the voltage rising rate of the switching tube is reduced, and the turn-off loss in the turn-off process is reduced. However, because the capacitance of the parallel connection of the switching tubes is large, the exciting current is difficult to meet the voltage reversal in dead time, and the switching rate is influenced by increasing the exciting current forcibly and increasing the primary side peak value.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a soft switch circuit through the suppressor that rises to the parallelly connected voltage of switch tube, can reduce soft switch circuit's turn-off loss.
In order to solve the above problem, an embodiment of the present invention provides a soft switching circuit, including: the power supply comprises a first MOS tube, a second MOS tube, a first voltage rise suppressor, a second voltage rise suppressor, a rectification controller, a power supply groove and a power supply output interface; wherein:
the first MOS tube is connected with the first voltage rise suppressor in parallel, the drain electrode of the first MOS tube is respectively connected with one end of the first voltage rise suppressor and the power supply groove, and the source electrode of the first MOS tube is respectively connected with the drain electrode of the second MOS tube, the other end of the first voltage rise suppressor, one end of the second voltage rise suppressor and one end of the rectification controller and is connected with the power supply output interface through the second MOS tube;
the second MOS tube is connected with the second voltage rise suppressor in parallel, the second MOS tube is connected with the rectification controller in parallel, a drain electrode of the second MOS tube is respectively connected with a source electrode of the first MOS tube, the other end of the first voltage rise suppressor, one end of the second voltage rise suppressor and one end of the rectification controller and is connected with the power supply groove through the first MOS tube, and a source electrode of the second MOS tube is respectively connected with the other end of the second voltage rise suppressor, the other end of the rectification controller and the power supply output interface.
Wherein the first voltage rise suppressor comprises: a first capacitor and a first switch;
one end of the first capacitor is connected with a power supply groove and a drain electrode of the first MOS tube respectively, and the other end of the first capacitor is connected with one end of the first switch;
one end of the first switch is connected with the first capacitor, and the other end of the first switch is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the second voltage rise suppressor and one end of the rectification controller.
Wherein the second voltage rise suppressor includes: a second capacitor and a second switch;
one end of the second capacitor is connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, the other end of the first voltage rise suppressor and one end of the rectification controller respectively, and the other end of the second capacitor is connected with one end of the second switch;
one end of the second switch is connected with the second capacitor, and the other end of the second switch is respectively connected with the source electrode of the second MOS tube, the other end of the rectification controller and the power output interface.
Wherein the first voltage rise suppressor comprises: the first resistor, the third capacitor and the third MOS tube;
the first resistor is connected with the third capacitor in parallel, one end of the first resistor is respectively connected with the drain electrode of the first MOS tube, one end of the third capacitor and the power supply groove, and the other end of the first resistor is respectively connected with the other end of the third capacitor and the drain electrode of the third MOS tube;
the third capacitor is connected with the first resistor in parallel, one end of the third capacitor is respectively connected with the drain electrode of the first MOS transistor, one end of the first resistor and the power supply groove, and the other end of the third capacitor is respectively connected with the other end of the first resistor and the drain electrode of the third MOS transistor;
and the drain electrode of the third MOS tube is respectively connected with the other end of the first resistor and the other end of the third capacitor, and the source electrode of the third MOS tube is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the second voltage rise suppressor and one end of the rectification controller.
Wherein the second voltage rise suppressor includes: the second resistor, the fourth capacitor and the fourth MOS tube;
the second resistor is connected in parallel with the fourth capacitor, one end of the second resistor is respectively connected with the source electrode of the first MOS transistor, the drain electrode of the second MOS transistor, one end of the fourth capacitor, the other end of the first voltage rise suppressor and one end of the rectification controller, and the other end of the second resistor is respectively connected with the other end of the fourth capacitor and the drain electrode of the fourth MOS transistor;
the fourth capacitor is connected in parallel with the second resistor, one end of the fourth capacitor is respectively connected with the source electrode of the first MOS transistor, the drain electrode of the second MOS transistor, one end of the second resistor, the other end of the first voltage rise suppressor and one end of the rectification controller, and the other end of the fourth capacitor is respectively connected with the other end of the second resistor and the drain electrode of the fourth MOS transistor;
and the drain electrode of the fourth MOS tube is respectively connected with the other end of the second resistor and the other end of the fourth capacitor, and the source electrode of the fourth MOS tube is respectively connected with the other end of the rectification controller, the source electrode of the second MOS tube and the power output interface.
Wherein the first voltage rise suppressor comprises: the third resistor, the first diode, the first voltage regulator tube and the fifth capacitor;
the third resistor is connected with the first diode in parallel, one end of the third resistor is respectively connected with the drain electrode of the first MOS tube, the cathode tube of the first diode and the power supply tank, and the other end of the third resistor is respectively connected with the anode of the first diode and the anode of the first voltage regulator tube;
the first diode is connected with the third resistor in parallel, the anode of the first diode is respectively connected with the other end of the third resistor and the anode of the first voltage-stabilizing tube, and the cathode of the first diode is respectively connected with the drain electrode of the first MOS tube, one end of the third resistor and the power supply groove;
the anode of the first voltage-stabilizing tube is connected with the other end of the third resistor and the anode of the first diode respectively, and the cathode of the first voltage-stabilizing tube is connected with one end of the fifth capacitor;
one end of the fifth capacitor is connected with the cathode of the first voltage-stabilizing tube, and the other end of the fifth capacitor is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the second voltage rise suppressor and one end of the rectification controller.
Wherein the second voltage rise suppressor includes: the fourth resistor, the second diode, the second voltage regulator tube and the sixth capacitor;
the fourth resistor is connected in parallel with the second diode, one end of the fourth resistor is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, the cathode of the second diode, the other end of the first voltage rise suppressor and one end of the rectification controller, and the other end of the fourth resistor is respectively connected with the anode of the second diode and the anode of the second voltage regulator tube;
the second diode is connected with the fourth resistor in parallel, the anode of the second diode is respectively connected with the other end of the fourth resistor and the anode of the second voltage-stabilizing tube, and the cathode of the second diode is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the fourth resistor, the other end of the first voltage rise suppressor and one end of the rectification controller;
the anode of the second voltage-regulator tube is connected with the other end of the fourth resistor and the anode of the second diode respectively, and the cathode of the second voltage-regulator tube is connected with one end of the sixth capacitor;
one end of the sixth capacitor is connected with the cathode of the second voltage regulator tube, and the other end of the sixth capacitor is respectively connected with the other end of the rectification controller, the source electrode of the second MOS tube and the power output interface.
Wherein the rectification controller includes: the circuit comprises an inductor, a transformer, a third diode, a fourth diode, a seventh capacitor and a rectifying capacitor;
one end of the inductor L is connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, the other end of the first voltage rise suppressor and one end of the second voltage rise suppressor respectively, and the other end of the inductor L is connected with one end of the transformer;
one end of the transformer is connected with the other end of the inductor and the anode of the third diode respectively, the other end of the transformer is connected with one end of the seventh capacitor and the anode of the fourth diode respectively, and the sliding end of the transformer is connected with the cathode of the rectifying capacitor;
the anode of the third diode is connected with one end of the transformer, and the cathode of the third diode is respectively connected with the cathode of the fourth diode and the anode of the rectifying capacitor;
the anode of the fourth diode is connected with the other end of the transformer, and the cathode of the fourth diode is respectively connected with the cathode of the third diode and the anode of the rectifying capacitor;
the anode of the rectifying capacitor is respectively connected with the cathode of the third diode and the cathode of the fourth diode, and the cathode of the rectifying capacitor is connected with the sliding end of the transformer;
one end of the seventh capacitor is connected with the other end of the transformer, and the other end of the seventh capacitor is respectively connected with the other end of the second voltage rise suppressor, the source electrode of the second MOS tube and the power output interface.
Implement the embodiment of the utility model provides a, following beneficial effect has:
the soft switching circuit adopts the first voltage rise suppressor and the second voltage rise suppressor to reduce the turn-off loss of the MOS tube, and the first voltage rise suppressor and the second voltage rise suppressor which are formed by connecting the capacitor and the switch in series can control the voltage rise rate of the MOS tube by the capacitor and reduce the turn-off loss of the circuit when the capacitor is connected with the MOS tube in parallel; the first voltage rise suppressor and the second voltage rise suppressor are formed by a capacitor, a resistor and an MOS tube, and cost optimization of the soft switching circuit is increased through the difference of the switching speed and the on-resistance of the MOS tube; the first voltage rise suppressor and the second voltage rise suppressor are composed of a resistor, a diode, a voltage regulator tube and a capacitor, and the problem of auxiliary tube loss in the soft switching circuit is solved through the action of the diode and the voltage regulator tube.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a circuit schematic of a soft switching circuit of the present invention;
FIG. 2 is a circuit schematic of another soft switching circuit of the present invention;
fig. 3 is a circuit schematic of yet another soft switching circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a schematic circuit diagram of a soft switching circuit according to an embodiment of the present invention is provided. As shown in fig. 1, the soft switching circuit 10 includes: the power supply circuit comprises a first MOS tube 11, a second MOS tube 12, a first voltage rise suppressor 13, a second voltage rise suppressor 14, a rectification controller 15, a power supply tank 16 and a power supply output interface 17;
the first MOS transistor 11 is connected in parallel with the first voltage rise suppressor 13, a drain of the first MOS transistor 11 is connected to one end of the first voltage rise suppressor 13 and the power supply tank 16, respectively, and a source of the first MOS transistor 11 is connected to a drain of the second MOS transistor 12, the other end of the first voltage rise suppressor 13, one end of the second voltage rise suppressor 14, and one end of the rectification controller 15, respectively, and is connected to the power supply output interface 17 through the second MOS transistor 12;
the second MOS transistor 12 is connected in parallel with the second voltage rise suppressor 14, while the second MOS transistor 12 is connected in parallel with the rectification controller 15, a drain of the second MOS transistor 12 is connected to a source of the first MOS transistor 11, the other end of the first voltage rise suppressor 13, one end of the second voltage rise suppressor 14, and one end of the rectification controller 15, and is connected to the power supply tank 16 through the first MOS transistor 11, and a source of the second MOS transistor 12 is connected to the other end of the second voltage rise suppressor 14, the other end of the rectification controller 15, and the power supply output interface 17.
In a first implementation manner of the embodiment of the present invention, the first voltage rise suppressor 13 includes: a first capacitor 131 and a first switch 132;
one end of the first capacitor 131 is connected to the power supply slot 16 and the drain of the first MOS transistor 11, and the other end of the first capacitor 131 is connected to one end of the first switch 132;
one end of the first switch 132 is connected to the first capacitor 131, and the other end of the first switch 132 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, one end of the second voltage rise suppressor 14, and one end of the rectification controller 15.
Further, in the embodiment of the present invention, the second voltage rise suppressor 14 includes: a second capacitor 141 and a second switch 142;
one end of the second capacitor 141 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, the other end of the first voltage rise suppressor 13, and one end of the rectification controller 15, respectively, and the other end of the second capacitor 141 is connected to one end of the second switch 142;
one end of the second switch 142 is connected to the second capacitor 141, and the other end of the second switch 142 is connected to the source of the second MOS transistor 12, the other end of the rectifier controller 15, and the power output interface 17.
In the first implementation manner of the embodiment of the present invention, the first voltage rise suppressor 13 includes a first capacitor 131 and a first switch 132, wherein the first capacitor 131 is connected in parallel with the first capacitor 131 in the early stage of turn-off of the first MOS transistor 11, and the first capacitor 131 may have a larger capacitor to suppress the voltage rise rate of the first MOS transistor 11, so as to reduce the turn-off loss of the first MOS transistor 11; when the first MOS transistor 11 is completely turned off, the first switch 132 is turned off, and the first capacitor 131 is in an inoperative state. Since the turn-off initial time of the first MOS transistor 11 is short, the first capacitor 131 can satisfy the excitation current in a short time without increasing the primary side peak value.
In a second implementation manner of the embodiment of the present invention, please refer to fig. 2, which provides a circuit schematic diagram of another soft switching circuit according to the embodiment of the present invention.
As shown in fig. 2, in a second mode of the embodiment of the present invention, the first voltage rise suppressor 13 includes: a first resistor 133, a third capacitor 134 and a third MOS transistor 135;
the first resistor 133 is connected in parallel with the third capacitor 134, one end of the first resistor 133 is respectively connected to the drain of the first MOS transistor 11, one end of the third capacitor 134 and the power supply slot 16, and the other end of the first resistor 133 is respectively connected to the other end of the third capacitor 134 and the drain of the third MOS transistor 135;
the third capacitor 134 is connected in parallel with the first resistor 133, one end of the third capacitor 134 is connected to the drain of the first MOS transistor 11, one end of the first resistor 133 and the power supply slot 16, and the other end of the third capacitor 134 is connected to the other end of the first resistor 133 and the drain of the third MOS transistor 135;
the drain of the third MOS transistor 135 is connected to the other end of the first resistor 133 and the other end of the third capacitor 134, and the source of the third MOS transistor 135 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, one end of the second voltage rise suppressor 13, and one end of the rectifier controller 15.
Further, in the embodiment of the present invention, the second voltage rise suppressor 14 includes: a second resistor 143, a fourth capacitor 144 and a fourth MOS transistor 145;
the second resistor 143 is connected in parallel to the fourth capacitor 144, one end of the second resistor 143 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, one end of the fourth capacitor 144, the other end of the first voltage rise suppressor 13, and one end of the rectification controller 15, respectively, and the other end of the second resistor 143 is connected to the other end of the fourth capacitor 144 and the drain of the fourth MOS transistor 145, respectively;
the fourth capacitor 144 is connected in parallel with the second resistor 143, one end of the fourth capacitor 144 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, one end of the second resistor 143, the other end of the first voltage rise suppressor 13, and one end of the rectification controller 15, respectively, and the other end of the fourth capacitor 144 is connected to the other end of the second resistor 143 and the drain of the fourth MOS transistor 145, respectively;
the drain of the fourth MOS 145 is connected to the other end of the second resistor 143 and the other end of the fourth capacitor 144, and the source of the fourth MOS 145 is connected to the other end of the rectifier controller 15, the source of the second MOS 12, and the power output interface 17.
In the second implementation manner of the embodiment of the present invention, the switching speed of the first MOS transistor 11 and the second MOS transistor 12 is slower, and the on-resistance is smaller, while the switching speed of the third MOS transistor 135 and the fourth MOS transistor 145 is faster but the on-resistance is larger, which can increase the cost optimization realized by the soft switching circuit 10.
In a third implementation manner of the embodiment of the present invention, please refer to fig. 3, which provides a circuit schematic diagram of another soft switching circuit according to the embodiment of the present invention.
As shown in fig. 3, in a third embodiment of the present invention, the first voltage rise suppressor 13 includes: a third resistor 136, a first diode 137, a first voltage regulator 138, and a fifth capacitor 139;
the third resistor 136 is connected in parallel with the first diode 137, one end of the third resistor 136 is respectively connected with the drain of the first MOS transistor 11, the cathode of the first diode 137 and the power supply tank 16, and the other end of the third resistor 136 is respectively connected with the anode of the first diode 137 and the anode of the first voltage regulator tube 138;
the first diode 137 is connected in parallel with the third resistor 136, an anode of the first diode 137 is connected to the other end of the third resistor 136 and an anode of the first voltage regulator tube 138, respectively, and a cathode of the first diode 137 is connected to a drain of the first MOS tube 11, one end of the third resistor 136 and the power supply tank 16, respectively;
the anode of the first voltage regulator tube 138 is connected to the other end of the third resistor 136 and the anode of the first diode 137, and the cathode of the first voltage regulator tube 138 is connected to one end of the fifth capacitor 139;
one end of the fifth capacitor 139 is connected to the cathode of the first voltage regulator 138, and the other end of the fifth capacitor 139 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, one end of the second voltage rise suppressor 14, and one end of the rectifier controller 15, respectively.
Further, in the embodiment of the present invention, the second voltage rise suppressor 14 includes: a fourth resistor 146, a second diode 147, a second voltage regulator tube 148, and a sixth capacitor 149;
the fourth resistor 146 is connected in parallel with the second diode 147, one end of the fourth resistor 146 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, the cathode of the second diode 147, the other end of the first voltage rise suppressor 13, and one end of the rectification controller 15, respectively, and the other end of the fourth resistor 146 is connected to the anode of the second diode 147 and the anode of the second regulator 148, respectively;
the second diode 147 is connected in parallel with the fourth resistor 146, an anode of the second diode 147 is connected to the other end of the fourth resistor 146 and an anode of the second regulator 148, respectively, and a cathode of the second diode 147 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, one end of the fourth resistor 146, the other end of the first voltage rise suppressor 13, and one end of the rectifier controller 15, respectively;
the anode of the second regulator tube 148 is connected to the other end of the fourth resistor 146 and the anode of the second diode 147, respectively, and the cathode of the second regulator tube 148 is connected to one end of the sixth capacitor 149;
one end of the sixth capacitor 149 is connected to the cathode of the second voltage regulator tube 148, and the other end of the sixth capacitor 149 is connected to the other end of the rectifier controller 15, the source of the second MOS transistor 12, and the power output interface 17.
In a third implementation manner of the embodiment of the present invention, a resistor, a diode, a voltage regulator and a capacitor are used to form a voltage rise suppressor, the first voltage rise suppressor 13 can implement a complete soft turn-off for the second MOS transistor, the second voltage rise suppressor 14 can implement a complete soft turn-off for the first MOS transistor, and whether the first voltage rise suppressor 13 and the second MOS transistor 12 are connected in parallel is implemented by whether the second voltage regulator 148 is turned on in the reverse direction. Whether the second voltage rise suppressor 14 is connected with the first MOS transistor 11 in parallel or not is realized by whether the first voltage regulator tube 138 is reversely conducted, so that the loss of an auxiliary tube in the soft switch circuit 10 is reduced.
Further, in the embodiment of the present invention, the rectification controller 15 includes: an inductor 151, a transformer 152, a third diode 153, a fourth diode 154, a seventh capacitor 155, and a rectifying capacitor 156;
one end of the inductor 151 is connected to the source of the first MOS transistor 11, the drain of the second MOS transistor 12, the other end of the first voltage rise suppressor 13, and one end of the second voltage rise suppressor 14, respectively, and the other end of the inductor 151 is connected to one end of the transformer 152;
one end of the transformer 152 is connected to the other end of the inductor 151 and the anode of the third diode 153, the other end of the transformer 152 is connected to one end of the seventh capacitor 155 and the anode of the fourth diode 154, and the sliding end of the transformer 152 is connected to the cathode of the rectifying capacitor 156;
an anode of the third diode 153 is connected to one end of the transformer 152, and a cathode of the third diode 153 is connected to a cathode of the fourth diode 154 and an anode of the rectifying capacitor 156, respectively;
the anode of the fourth diode 154 is connected to the other end of the transformer 152, and the cathode of the fourth diode 154 is respectively connected to the cathode of the third diode 153 and the anode of the rectifying capacitor 156;
the anode of the rectifying capacitor 156 is connected to the cathode of the third diode 153 and the cathode of the fourth diode 154, respectively, and the cathode of the rectifying capacitor 156 is connected to the sliding end of the transformer 152;
one end of the seventh capacitor 156 is connected to the other end of the transformer 152, and the other end of the seventh capacitor 156 is connected to the other end of the second voltage rise suppressor 14, the source of the second MOS transistor 12, and the power output interface 17, respectively.
The soft switching circuit adopts the first voltage rise suppressor and the second voltage rise suppressor to reduce the turn-off loss of the MOS tube, and the first voltage rise suppressor and the second voltage rise suppressor which are formed by connecting the capacitor and the switch in series can control the suppression time of the voltage rise rate of the MOS tube by the capacitor when the capacitor is connected with the MOS tube in parallel through the switch, thereby reducing the turn-off loss of the circuit; the first voltage rise suppressor and the second voltage rise suppressor are formed by a capacitor, a resistor and an MOS tube, and cost optimization of the soft switching circuit is increased through the difference of the switching speed and the on-resistance of the MOS tube; the first voltage rise suppressor and the second voltage rise suppressor are composed of a resistor, a diode, a voltage regulator tube and a capacitor, and the problem of auxiliary tube loss in the soft switching circuit is solved through the action of the diode and the voltage regulator tube.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (8)
1. A soft switching circuit, comprising: the power supply comprises a first MOS tube, a second MOS tube, a first voltage rise suppressor, a second voltage rise suppressor, a rectification controller, a power supply groove and a power supply output interface; wherein,
the first MOS tube is connected with the first voltage rise suppressor in parallel, the drain electrode of the first MOS tube is respectively connected with one end of the first voltage rise suppressor and the power supply groove, and the source electrode of the first MOS tube is respectively connected with the drain electrode of the second MOS tube, the other end of the first voltage rise suppressor, one end of the second voltage rise suppressor and one end of the rectification controller and is connected with the power supply output interface through the second MOS tube;
the second MOS tube is connected with the second voltage rise suppressor in parallel, the second MOS tube is connected with the rectification controller in parallel, a drain electrode of the second MOS tube is respectively connected with a source electrode of the first MOS tube, the other end of the first voltage rise suppressor, one end of the second voltage rise suppressor and one end of the rectification controller and is connected with the power supply groove through the first MOS tube, and a source electrode of the second MOS tube is respectively connected with the other end of the second voltage rise suppressor, the other end of the rectification controller and the power supply output interface.
2. The soft-switching circuit of claim 1, wherein the first voltage rise suppressor comprises: a first capacitor and a first switch;
one end of the first capacitor is connected with a power supply groove and a drain electrode of the first MOS tube respectively, and the other end of the first capacitor is connected with one end of the first switch;
one end of the first switch is connected with the first capacitor, and the other end of the first switch is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the second voltage rise suppressor and one end of the rectification controller.
3. The soft switching circuit of claim 2, wherein the second voltage rise suppressor comprises: a second capacitor and a second switch;
one end of the second capacitor is connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, the other end of the first voltage rise suppressor and one end of the rectification controller respectively, and the other end of the second capacitor is connected with one end of the second switch;
one end of the second switch is connected with the second capacitor, and the other end of the second switch is respectively connected with the source electrode of the second MOS tube, the other end of the rectification controller and the power output interface.
4. The soft-switching circuit of claim 1, wherein the first voltage rise suppressor comprises: the first resistor, the third capacitor and the third MOS tube;
the first resistor is connected with the third capacitor in parallel, one end of the first resistor is respectively connected with the drain electrode of the first MOS tube, one end of the third capacitor and the power supply groove, and the other end of the first resistor is respectively connected with the other end of the third capacitor and the drain electrode of the third MOS tube;
the third capacitor is connected with the first resistor in parallel, one end of the third capacitor is respectively connected with the drain electrode of the first MOS transistor, one end of the first resistor and the power supply groove, and the other end of the third capacitor is respectively connected with the other end of the first resistor and the drain electrode of the third MOS transistor;
and the drain electrode of the third MOS tube is respectively connected with the other end of the first resistor and the other end of the third capacitor, and the source electrode of the third MOS tube is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the second voltage rise suppressor and one end of the rectification controller.
5. The soft-switching circuit of claim 4, wherein the second voltage rise suppressor comprises: the second resistor, the fourth capacitor and the fourth MOS tube;
the second resistor is connected in parallel with the fourth capacitor, one end of the second resistor is respectively connected with the source electrode of the first MOS transistor, the drain electrode of the second MOS transistor, one end of the fourth capacitor, the other end of the first voltage rise suppressor and one end of the rectification controller, and the other end of the second resistor is respectively connected with the other end of the fourth capacitor and the drain electrode of the fourth MOS transistor;
the fourth capacitor is connected in parallel with the second resistor, one end of the fourth capacitor is respectively connected with the source electrode of the first MOS transistor, the drain electrode of the second MOS transistor, one end of the second resistor, the other end of the first voltage rise suppressor and one end of the rectification controller, and the other end of the fourth capacitor is respectively connected with the other end of the second resistor and the drain electrode of the fourth MOS transistor;
and the drain electrode of the fourth MOS tube is respectively connected with the other end of the second resistor and the other end of the fourth capacitor, and the source electrode of the fourth MOS tube is respectively connected with the other end of the rectification controller, the source electrode of the second MOS tube and the power output interface.
6. The soft-switching circuit of claim 1, wherein the first voltage rise suppressor comprises: the third resistor, the first diode, the first voltage regulator tube and the fifth capacitor;
the third resistor is connected with the first diode in parallel, one end of the third resistor is respectively connected with the drain electrode of the first MOS tube, the cathode of the first diode and the power supply tank, and the other end of the third resistor is respectively connected with the anode of the first diode and the anode of the first voltage regulator tube;
the first diode is connected with the third resistor in parallel, the anode of the first diode is respectively connected with the other end of the third resistor and the anode of the first voltage-stabilizing tube, and the cathode of the first diode is respectively connected with the drain electrode of the first MOS tube, one end of the third resistor and the power supply groove;
the anode of the first voltage-stabilizing tube is connected with the other end of the third resistor and the anode of the first diode respectively, and the cathode of the first voltage-stabilizing tube is connected with one end of the fifth capacitor;
one end of the fifth capacitor is connected with the cathode of the first voltage-stabilizing tube, and the other end of the fifth capacitor is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the second voltage rise suppressor and one end of the rectification controller.
7. The soft-switching circuit of claim 6, wherein the second voltage rise suppressor comprises: the fourth resistor, the second diode, the second voltage regulator tube and the sixth capacitor;
the fourth resistor is connected in parallel with the second diode, one end of the fourth resistor is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, the cathode of the second diode, the other end of the first voltage rise suppressor and one end of the rectification controller, and the other end of the fourth resistor is respectively connected with the anode of the second diode and the anode of the second voltage regulator tube;
the second diode is connected with the fourth resistor in parallel, the anode of the second diode is respectively connected with the other end of the fourth resistor and the anode of the second voltage-stabilizing tube, and the cathode of the second diode is respectively connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, one end of the fourth resistor, the other end of the first voltage rise suppressor and one end of the rectification controller;
the anode of the second voltage-regulator tube is connected with the other end of the fourth resistor and the anode of the second diode respectively, and the cathode of the second voltage-regulator tube is connected with one end of the sixth capacitor;
one end of the sixth capacitor is connected with the cathode of the second voltage regulator tube, and the other end of the sixth capacitor is respectively connected with the other end of the rectification controller, the source electrode of the second MOS tube and the power output interface.
8. The soft switching circuit of any one of claims 1-7, wherein the rectification controller comprises: the circuit comprises an inductor, a transformer, a third diode, a fourth diode, a seventh capacitor and a rectifying capacitor;
one end of the inductor L is connected with the source electrode of the first MOS tube, the drain electrode of the second MOS tube, the other end of the first voltage rise suppressor and one end of the second voltage rise suppressor respectively, and the other end of the inductor L is connected with one end of the transformer;
one end of the transformer is connected with the other end of the inductor and the anode of the third diode respectively, the other end of the transformer is connected with one end of the seventh capacitor and the anode of the fourth diode respectively, and the sliding end of the transformer is connected with the cathode of the rectifying capacitor;
the anode of the third diode is connected with one end of the transformer, and the cathode of the third diode is respectively connected with the cathode of the fourth diode and the anode of the rectifying capacitor;
the anode of the fourth diode is connected with the other end of the transformer, and the cathode of the fourth diode is respectively connected with the cathode of the third diode and the anode of the rectifying capacitor;
the anode of the rectifying capacitor is respectively connected with the cathode of the third diode and the cathode of the fourth diode, and the cathode of the rectifying capacitor is connected with the sliding end of the transformer;
one end of the seventh capacitor is connected with the other end of the transformer, and the other end of the seventh capacitor is respectively connected with the other end of the second voltage rise suppressor, the source electrode of the second MOS tube and the power output interface.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109417352A (en) * | 2017-09-18 | 2019-03-01 | 深圳欣锐科技股份有限公司 | A kind of soft switch circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109417352A (en) * | 2017-09-18 | 2019-03-01 | 深圳欣锐科技股份有限公司 | A kind of soft switch circuit |
| CN109417352B (en) * | 2017-09-18 | 2021-11-16 | 深圳欣锐科技股份有限公司 | Soft switching circuit |
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