TWI575855B - Resonance control device - Google Patents

Description

Resonance control device

The present invention relates to a control device, and more particularly to a resonance control device.

In today's power industry, switching power supplies mostly use a half-bridge architecture driver to drive an external load circuit; the reason is that the half-bridge architecture can operate the induced magnetic field in the first and third quadrants. For example, the forward or reverse architecture can only work in the first quadrant. In comparison, the driver of the half bridge architecture is obviously much more efficient.

The conventional half-bridge driving device is generally configured as shown in FIG. 1 and includes a signal controller 10, a first electronic switch 12, a second electronic switch 14, and a resonant tank 16, wherein the first electronic device Both the switch 12 and the second electronic switch 14 are N-channel MOSFETs. In theory, the signal controller 10 controls the first electronic switch 12 and the second electronic switch 14 to be alternately switched, that is, when the first electronic switch 12 is turned on, the second electronic switch 14 is turned off, so that energy is stored from the high voltage terminal VH. In the resonant tank 16, when the first electronic switch 12 is turned off, the second electronic switch 14 is turned on to release energy from the resonant tank 16 to the low voltage terminal VL. However, the signal controller 10 is actually unstable. In the actual situation, when the second electronic switch 14 is turned from the on state to the off state, but still in the on state, the first electronic switch 12 is also turned on to make energy. Leading to the resonant tank 16 causes a current surge between the first electronic switch 12 and the second electronic switch 14 to damage the first electronic switch 12 and the second electronic switch 14. In addition, the conventional full-bridge driving device has the same situation. The full-bridge driving device includes a signal controller 18, a first electronic switch 20, a second electronic switch 22, and a third as shown in FIG. The electronic switch 24, a fourth electronic switch 26 and a resonant tank 28. In theory, the signal controller 18 controls the first electronic switch 20 and the second electronic switch 22 to assume the same switching state, and controls the third electronic switch 24 and the fourth electronic switch 26 to assume the same switching state, and when the first electronic switch 20 and the first electronic switch 20 When the second electronic switch 22 is turned on, the third electronic switch 24 and the fourth electronic switch 26 are turned off, so that energy is transmitted from the high voltage terminal VH through the first electronic switch 20 and the second electronic switch 22 to the low voltage terminal VL. When the first electronic switch 20 and the second electronic switch 22 are turned off, the third electronic switch 24 and the fourth electronic switch 26 are turned on, so that energy is transmitted from the high voltage terminal VH through the third electronic switch 24 and the fourth electronic switch 26 to the low Voltage terminal VL. However, the signal controller 18 is also unstable. In the actual situation, when the fourth electronic switch 26 is turned from the on state to the off state, but still in the on state, the first electronic switch 20 is also turned on, so that the energy is passed. To the resonant tank 16, a current surge is generated between the first electronic switch 20 and the fourth electronic switch 26 to damage the first electronic switch 20 and the fourth electronic switch 26. Similarly, when the second electronic switch 22 is turned from the on state to the off state, but is still in the on state, the third electronic switch 24 is also turned on, so that energy is directed to the resonant tank 16, causing the second electronic switch 22 to A current surge is generated between the third electronic switches 24 to damage the second electronic switch 22 and the third electronic switch 24.

Accordingly, the present invention has been made in view of the above-mentioned problems, and a resonance control apparatus has been proposed to solve the problems caused by the prior art.

The main object of the present invention is to provide a resonance control device which is applied to a half bridge resonant circuit or a full bridge resonant circuit, and connects a detecting controller to a node between two electronic switches in the resonant circuit to borrow This detects the voltage at the node between the two electronic switches. When some of the electronic switches are turned on, their corresponding parasitic capacitances are discharged and present a low voltage, so that the detection controller drives the remaining electronic switches to be turned off to ensure electronic switches in the half-bridge resonant circuit and the full-bridge resonant circuit. All of them can operate in the above-described alternate switching mode, thereby avoiding the shoot through effect.

To achieve the above objective, the present invention provides a resonance control apparatus including a first electronic switch, a second electronic switch, a resonant tank, a detecting controller and a signal controller. The first electronic switch is electrically connected to a high voltage end and a node, the second electronic switch is electrically connected to the node and a low voltage end, the second electronic switch has a parasitic capacitance, and one end of the parasitic capacitor is electrically connected to the low voltage end, and the other One end is electrically connected to the node, and the low voltage end is, for example, a ground terminal. The resonant tank is electrically connected to the node and stores resonant energy. The detecting controller is electrically connected to the low voltage end, the node and the first electronic switch, and receives the voltage of the node and a first digital signal. When the second electronic switch is in an on state, the voltage of the node is a low voltage of the low voltage end, that is, a ground potential, and the detecting controller provides a low voltage to the first electronic switch according to the voltage of the node, so that the first electronic switch is turned off. And the resonant tank generates a resonant current through the second electronic switch by using the resonant energy. When the second electronic switch is in a closed state, the resonant current is charged to the parasitic capacitance to increase the voltage of the node to a predetermined voltage value greater than the low voltage, and the detecting controller provides the first digital signal to the first according to the preset voltage value. The electronic switch turns the first electronic switch into a conductive state. The signal controller has a first end and a second end. The first end is electrically connected to the detection controller, and is electrically connected to the first electronic switch through an electrical isolator. The electrical isolator blocks the high voltage end of the high voltage terminal to the signal. The controller is electrically connected to the second electronic switch. The signal controller generates a first digital signal at the first end at a time point, and generates a second digital signal to the second electronic switch at the second end to control the second electronic switch to be turned on and off in sequence. status.

In one embodiment, before the detecting controller supplies the low voltage to the first electronic switch according to the voltage of the node, the signal controller controls the first electronic switch to be in an on state to store the resonant energy in the resonant tank by using the high voltage of the high voltage terminal. in.

The first electronic switch and the second electronic switch are both N-channel gold-oxygen half-field effect transistors, and the parasitic capacitance is a parasitic source capacitor. The first digital signal includes a high-level voltage signal and a low-level voltage signal, which are sequentially present. The two-digit signal includes a high-level voltage signal and a low-level voltage signal that appear in sequence.

The resonant tank further includes a first resonant inductor, a second resonant inductor and a resonant capacitor, and the second resonant inductor is, for example, a leakage inductance of a transformer. The first resonant inductor is electrically connected to the node, and the second resonant inductor is connected in series with the first resonant inductor and stores resonant energy. The resonant capacitor is connected in series with the second resonant inductor and electrically connected to the low voltage end, and the first resonant inductor, the second resonant inductor and the resonant capacitor generate resonant current by using the resonant energy.

In one embodiment, the detection controller further includes a P-channel MOS field-effect transistor and a diode. The gate of the P-channel MOSFET is electrically connected to the low-voltage terminal, the source is electrically connected to the first electronic switch, and receives the first digital signal; the voltage at the node is a low voltage The P-channel gold-oxygen half-field effect transistor provides a low voltage to the first electronic switch; when the voltage of the node is a preset voltage value, the P-channel MOS half-effect transistor provides the first digital signal to the first electronic switch . In addition, the positive electrode and the negative electrode of the diode are electrically connected to the gate and the node, respectively.

In one embodiment, the detection controller further includes a PNP bipolar junction transistor and a diode. The base of the PNP bipolar contact transistor is electrically connected to the node through a first resistor, and the collector is electrically connected to the low voltage end, the emitter is electrically connected to the first electronic switch, and is electrically connected through a second resistor. The base and the emitter receive the first digital signal; when the voltage of the node is a low voltage, the PNP dual-carrier junction transistor provides a low voltage to the first electronic switch; when the voltage of the node is a preset voltage value, the PNP The dual carrier junction transistor provides a first digital signal to the first electronic switch. The positive electrode and the negative electrode of the diode are electrically connected to the first resistor and the node, respectively.

The invention also provides a resonance control device, comprising a first electronic switch, a second electronic switch, a third electronic switch, a fourth electronic switch, a resonant tank, a first detecting controller and a second detecting Test controller and a signal controller. The first electronic switch is electrically connected to a high voltage end and a first node, and the second electronic switch is electrically connected to a low voltage end, such as a ground end, and the third electronic switch is electrically connected to the high voltage end and the second electronic switch. The fourth electronic switch is electrically connected to the low voltage end and the first node, and the switching states of the third electronic switch and the fourth electronic switch are the same. The fourth electronic switch has a first parasitic capacitance, one end of the first parasitic capacitance is electrically connected to the low voltage end, and the other end is electrically connected to the first node. The resonant tank is electrically connected to the first node, the first electronic switch, the second electronic switch, the third electronic switch and the fourth electronic switch. The first detecting controller is electrically connected to the low voltage end, the first node, the first electronic switch and the second electronic switch, and receives the first voltage of the first node and a first digital signal. When the third electronic switch and the fourth electronic switch are in a conducting state, the first voltage is a low voltage of the low voltage end, that is, a ground potential, and the first detecting controller provides a low voltage according to the first voltage to the first electronic switch and the first The second electronic switch causes the first electronic switch and the second electronic switch to be in a closed state, and the high voltage end generates a first resonant current to sequentially flow through the third electronic switch, the resonant tank, the fourth electronic switch and the low voltage end . When the third electronic switch and the fourth electronic switch are in a closed state, the first resonant current is charged to the first parasitic capacitance to increase the first voltage to a first predetermined voltage value greater than the low voltage, the first detecting controller And providing a first digital signal to the first electronic switch and the second electronic switch according to the first preset voltage value, so that the first electronic switch and the second electronic switch are in an on state.

In an embodiment, when the first electronic switch and the second electronic switch receive the first digital signal, the first electronic switch and the second electronic switch are sequentially turned on and off. The second detecting controller is electrically connected to the second node, the third electronic switch and the fourth electronic switch between the low voltage end, the second electronic switch and the third electronic switch. The second electronic switch has a second parasitic capacitance, one end of the second parasitic capacitance is electrically connected to the low voltage end, the other end is electrically connected to the second node, the resonant tank is electrically connected to the second node, and the second detecting controller receives the second a second voltage of the two nodes and a second digital signal; when the first electronic switch and the second electronic switch are in an on state, the second voltage is a low voltage, and the high voltage terminal generates a second resonant current to sequentially flow The first electronic switch, the resonant tank, the second electronic switch and the low voltage end, and the second detecting controller provides a low voltage to the third electronic switch and the fourth electronic switch according to the second voltage, so that the third electronic switch and the third electronic switch The four electronic switches are off. When the first electronic switch and the second electronic switch are in a closed state, the second resonant current is charged to the second parasitic capacitance to increase the second voltage to a second predetermined voltage value greater than the low voltage, and the second detection control The device provides a second digital signal to the third electronic switch and the fourth electronic switch according to the second preset voltage value, so that the third electronic switch and the fourth electronic switch are in a conducting state.

The signal controller has a first end and a second end. The first end is electrically connected to the first detecting controller, and is electrically connected to the first electronic switch and the second electronic switch through an electrical isolator, and the second end is electrically connected. The second detecting controller electrically connects the third electronic switch and the fourth electronic switch through the electrical isolator, and the electrical isolator blocks the voltage of the high voltage end from reaching the signal controller. The signal controller generates a first digital signal at the first end at a time point, and generates a second digital signal to the third electronic switch and the fourth electronic switch at the second end to control the third electronic switch and the first The four electronic switches are in a conductive state, a closed state, and a conductive state in sequence.

The first electronic switch, the second electronic switch, the third electronic switch and the fourth electronic switch are all N-channel MOS half-field effect transistors, and the first parasitic capacitance and the second parasitic capacitance are parasitic 电容 source capacitance, the first digital signal The high-level voltage signal and the low-level voltage signal appear in sequence, and the second-digit signal includes a high-level voltage signal, a low-level voltage signal, and a high-level voltage signal.

The resonant tank further includes a first resonant inductor, a second resonant inductor and a resonant capacitor, wherein the second resonant inductor is, for example, a leakage inductance of a transformer. The first resonant inductor is electrically connected to the second node, the second resonant inductor is connected in series with the first resonant inductor, and the resonant capacitor is connected in series with the second resonant inductor and electrically connected to the first node. The first resonant current sequentially flows through the first resonant inductor, the second resonant inductor, and the resonant capacitor, and the second resonant current sequentially flows through the resonant capacitor, the second resonant inductor, and the first resonant inductor.

In one embodiment, the first detection controller further includes a P-channel MOS field-effect transistor and a diode. The gate of the P-channel gold-oxygen half-effect transistor is electrically connected to the first node, the drain is electrically connected to the low voltage end, and the source is electrically connected to the first electronic switch and the second electronic switch, and receives the first digital signal; When the first voltage is a low voltage, the P-channel MOS half-effect transistor provides a low voltage to the first electronic switch and the second electronic switch; when the first voltage is the first preset voltage value, the P-channel MOS half-field effect The transistor provides a first digital signal to the first electronic switch and the second electronic switch. The anode and the cathode of the diode are electrically connected to the gate and the first node, respectively.

In an embodiment, the first detection controller further includes a PNP bipolar junction transistor and a diode. The base of the PNP bipolar contact transistor is electrically connected to the first node through a first resistor, and the collector is electrically connected to the low voltage end, and the emitter is electrically connected to the first electronic switch and the second electronic switch, and is transmitted through a first The second resistor is electrically connected to the base, and the emitter receives the first digital signal; when the first voltage is low, the PNP bipolar junction transistor provides a low voltage to the first electronic switch and the second electronic switch; When a voltage is the first predetermined voltage value, the PNP dual carrier junction transistor provides a first digital signal to the first electronic switch and the second electronic switch. The positive electrode and the negative electrode of the diode are electrically connected to the first resistor and the first node, respectively.

In one embodiment, the second detection controller further includes a P-channel MOS field-effect transistor and a diode. The gate of the P-channel MOS half-effect transistor is electrically connected to the second node, the drain is electrically connected to the low voltage end, and the source is electrically connected to the third electronic switch and the fourth electronic switch, and receives the second digital signal; When the second voltage is a low voltage, the P-channel MOS half-effect transistor provides a low voltage to the third electronic switch and the fourth electronic switch; when the second voltage is the second predetermined voltage value, the P-channel MOS half-field power The crystal provides a second digital signal to the third electronic switch and the fourth electronic switch. The positive pole and the negative pole of the diode are electrically connected to the gate and the second node, respectively.

In an embodiment, the second detection controller further includes a PNP bipolar junction transistor and a diode. The base of the PNP bipolar junction transistor is electrically connected to the second node through a first resistor, and the collector is electrically connected to the low voltage end, and the emitter is electrically connected to the third electronic switch and the fourth electronic switch, and is transmitted through a The second resistor is electrically connected to the base, and the emitter receives the second digit signal; when the second voltage is low, the PNP bipolar junction transistor provides a low voltage to the third electronic switch and the fourth electronic switch; When the two voltages are the second preset voltage values, the PNP bipolar junction transistor provides a second digital signal to the third electronic switch and the fourth electronic switch. The positive electrode and the negative electrode of the diode are electrically connected to the first resistor and the second node, respectively.

In order to give your reviewers a better understanding and understanding of the structural features and efficacies of the present invention, the following is a description of the preferred embodiment and the detailed description.

Embodiments of the invention will be further illustrated below in conjunction with the associated drawings. Wherever possible, the same reference numerals in the drawings In the drawings, shapes and thicknesses may be exaggerated based on simplification and convenient labeling. It is to be understood that the elements not specifically shown in the drawings or described in the specification are those of ordinary skill in the art. A variety of changes and modifications can be made by those skilled in the art in light of the present invention.

Please refer to Figure 3 below. The first embodiment of the resonant control device of the present invention is applied to a half bridge resonant circuit. The resonant control device includes a first electronic switch 30, a second electronic switch 32, a resonant tank 34, and a detection controller 36. A signal controller 38, for example, both the first electronic switch 30 and the second electronic switch 32 are N-channel MOSFETs. The first electronic switch 30 is electrically connected to a high voltage VH terminal and a node N. The second electronic switch 32 is electrically connected to the node N and a low voltage terminal VL. The second electronic switch 32 has a parasitic capacitance 40, for example, parasitic The source capacitor, one end of the parasitic capacitor 40 is electrically connected to the low voltage terminal VL, the other end is electrically connected to the node N, and the low voltage terminal VL is, for example, a ground terminal. The resonant tank 34 is electrically connected to the node N and stores resonance energy. The detection controller 36 is electrically connected to the low voltage terminal VL, the node N and the first electronic switch 30, and receives the voltage of the node N and a first digital signal D1, for example, a high level voltage signal. When the second electronic switch 32 is in the on state, the voltage of the node N is the low voltage of the low voltage terminal VL, that is, the ground potential, and the detection controller 36 provides the low voltage VL to the first electronic switch 30 according to the voltage of the node N, so that The first electronic switch 30 is in a closed state, and the resonant tank 34 generates a resonant current through the second electronic switch 32 using the resonant energy. When the second electronic switch 32 is in the off state, the resonant current charges the parasitic capacitor 40 to raise the voltage of the node N to a predetermined voltage value greater than the low voltage, and the detecting controller 36 provides the first digit according to the preset voltage value. The signal D1 is given to the first electronic switch 30, so that the first electronic switch 30 is in an on state. The signal controller 38 has a first end and a second end. The first end is electrically connected to the detecting controller 36, and is electrically connected to the first electronic switch 30 through an electrical isolator 41. The second end is electrically connected to the second electronic device. The switch 32; the electrical isolator 41 blocks the high voltage of the high voltage terminal VH from going to the signal controller 36 to prevent the high voltage terminal VH from affecting the signal controller 36. The electrical isolator 41 is exemplified by a transformer. In the present invention, it may be a 1 to 1 transformer. The signal controller 38 generates the first digital signal D1 at the first end at a time point, and generates a second digital signal D2 to the second electronic switch 32 at the second end to control the second electronic switch 32 in sequence. It is in the on state and off state. The second digit signal D2 includes, for example, a high-level voltage signal and a low-level voltage signal that appear sequentially. In order to enable the first digital signal D1 and the second digital signal D2 to be smoothly transmitted, a push-pull circuit composed of a transistor can be appropriately added.

The resonant tank 34 further includes a first resonant inductor 42, a second resonant inductor 44 and a resonant capacitor 46. The second resonant inductor 44 is, for example, a leakage inductance of a transformer. The first resonant inductor 42 is electrically connected to the node N, and the second resonant inductor 44 is connected in series with the first resonant inductor 42 and stores resonant energy. The resonant capacitor 46 is connected in series with the second resonant inductor 42 and electrically connected to the low voltage terminal VL. The first resonant inductor 42, the second resonant inductor 44 and the resonant capacitor 46 generate a resonant current using the resonant energy.

The detection controller 36 further includes a P-channel MOS field-effect transistor 48 and a diode 50. The gate of the P-channel MOS field-effect transistor 48 is electrically connected to the node N, the gate is electrically connected to the low-voltage terminal VL, and the source is electrically connected to the first electronic switch 30 through the electrical isolator 41, and the source is electrically The first end of the signal controller 38 is connected and receives the first digital signal D1. When the voltage at the node N is a low voltage, the P-channel MOS half-effect transistor 48 provides a low voltage to the first electronic switch 30 through the electrical isolator 41. When the voltage of the node N is a preset voltage value, the P-channel MOS field-effect transistor 48 provides the first digital signal D1 to the first electronic switch 30 through the electrical isolator 41. In addition, the positive electrode and the negative electrode of the diode 50 are electrically connected to the gate of the P-channel MOS field-effect transistor 48 and the node N, respectively.

The operation of the first embodiment of the present invention will be described below. Please refer to FIG. 3 and FIG. 4 at the same time. First, from time t0 to time t1, the signal controller 38 generates a first initial digital signal DI1 with a high voltage level and a second initial digital signal DI2 for a low voltage level at the first end and the second end, respectively. The first electronic switch 30 receives the first initial digital signal DI1 through the electrical isolator 41, and the second electronic switch 32 receives the second initial digital signal DI2, so that the first electronic switch 30 and the second electronic switch 32 are respectively turned on. With the off state. At this time, the high voltage of the high voltage terminal VH is transmitted through the first electronic switch 30, the first resonant inductor 42, and the resonant capacitor 46 to store the resonant energy in the second resonant inductor 44.

Then, from time t1 to time t2, the signal controller 38 generates a first initial digital signal DI1 at a low voltage level and a second initial digital signal DI2 at a high voltage level at the first end and the second end, respectively. The first electronic switch 30 receives the first initial digital signal DI1 through the electrical isolator 41, and the second electronic switch 32 receives the second initial digital signal DI2, so that the first electronic switch 30 and the second electronic switch 32 are respectively turned off. On state. At this time, the first resonant inductor 42, the second resonant inductor 44, and the resonant capacitor 46 generate a resonant current by the resonant energy to flow through the second electronic switch 32, and the voltage of the node N is a low voltage of the low voltage terminal VL.

Then, from time t2 to time t3, the signal controller 38 generates a first digital signal D1 of a low-level voltage signal and a second digital signal of a high-level voltage signal at the first end and the second end, respectively. D2, in place of the first initial digital signal DI1 and the second initial digital signal DI2, respectively. The second electronic switch 32 receives the second digital signal D2, and thus is in an on state. Since the voltage of the node N is the low voltage of the low voltage terminal VL, the P-channel MOS half-effect transistor 48 is turned on, the first digital signal cannot be the high-level voltage signal, and the first electronic switch 30 is thus turned off, and the first The resonant inductor 42, the second resonant inductor 44, and the resonant capacitor 46 still generate a resonant current through the second electronic switch 32 using the resonant energy. In one case, only one of the first digital signal D1 and the second digital signal D2 is a high level voltage signal. However, the signal controller 38 may first provide a high level voltage signal due to an error in timing. The digital signal D1, at this time, the detection controller 36 of the present invention can prevent the first electronic switch 30 and the second electronic switch 32 from being simultaneously turned on.

Finally, from time t3 to time t4, the signal controller 38 generates a first digital signal D1 of a high-level voltage signal and a second digital signal D2 of a low-level voltage signal at the first end and the second end, respectively. . In the actual situation, there is still a period of time between when the second digit signal D2 is switched to the low level voltage signal and the first digit signal D1 is switched to the high level voltage signal. Since this time is very short, in FIG. 4 Was omitted. During this period of time, the second electronic switch 32 receives the second digital signal D2, so that it is in a closed state, and the resonant current charges the parasitic capacitor 40 to raise the voltage of the node N to a preset voltage value greater than the low voltage. After this period of time, the first digital signal D1 is switched to the high level voltage signal, the P channel MOS half field effect transistor 48 is switched, and the first digital signal D1 is supplied to the first electronic switch 30 through the electrical isolator 41. The first electronic switch 30 is turned on. In this way, by detecting the voltage of the node N by the detecting controller 36, the first electronic switch 30 and the second electronic switch 32 can be alternately switched to avoid the shoot through effect. After the time point t4, the first digital signal D1 can also be a low level voltage signal.

In addition to the above, when the signal controller 38 turns on the second electronic switch 32 at the time of power-on, it may happen that the second electronic switch 32 has not been turned off, and the first electronic switch 30 is turned on, and the shoot-through occurs. In this case, the detection controller 36 of the present invention can detect that the parasitic capacitance 40 has not been charged to a predetermined value, and prevent the first electronic switch 30 from being turned on simultaneously with the second electronic switch. In addition, the present invention uses the first initial digital signal DI1 and the first digital signal D1, the second initial digital signal DI2 and the second digital signal D2. For convenience of description, the limited signal controller 38 does not distinguish the first initial digital signal. DI1 and the first digital signal D1, or the second initial digital signal DI2 and the second digital signal D2.

Please refer to Figure 5 below. The second embodiment of the resonance control device of the present invention is also applied to a half bridge resonant circuit. The second embodiment differs from the first embodiment in that the controller 36 is detected. In the second embodiment, the detection controller 36 further includes a PNP bipolar junction transistor 52 and a diode 54. The base of the PNP bipolar junction transistor 52 is electrically connected to the node N through a first resistor 56, and the collector is electrically connected to the low voltage terminal VL. The emitter is electrically connected to the first electronic switch 30 through the electrical isolator 41. The emitter is electrically connected to the first end of the signal controller 38, and is electrically connected to the base through a second resistor 58 to receive the first digital signal D1. When the voltage at the node N is a low voltage, the PNP bipolar junction transistor 52 supplies a low voltage to the first electronic switch 30 through the electrical isolator 41. When the voltage of the node N is a preset voltage value, the PNP dual-carrier junction transistor 52 provides the first digital signal D1 to the first electronic switch 30 through the electrical isolator 41. In addition, the positive electrode and the negative electrode of the diode 54 are electrically connected to the first resistor 56 and the node N, respectively.

The operation of the second embodiment of the present invention will be described below. Please refer to FIG. 5 and FIG. 4 at the same time. The operation from the time point t0 to the time point t2 is the same as that of the first embodiment, and details are not described herein again. From time t2 to time t3, the signal controller 38 generates a first digital signal D1 of a low-level voltage signal and a second digital signal D2 of a high-level voltage signal at the first end and the second end, respectively. The first initial digital signal DI1 and the second initial digital signal DI2 are replaced respectively. The second electronic switch 32 receives the second digital signal D2, and thus is in an on state. Since the voltage of the node N is the low voltage of the low voltage terminal VL, the PNP dual carrier junction transistor 52 is turned on, and the first digital signal D1 cannot be a high level voltage signal, and the first electronic switch 30 is thus turned off, and the first A resonant inductor 42, a second resonant inductor 44, and a resonant capacitor 46 still generate resonant current through the second electronic switch 32 using resonant energy. In one case, only one of the first digital signal D1 and the second digital signal D2 is a high level voltage signal. However, the signal controller 38 may first provide a high level voltage signal due to an error in timing. The digital signal D1, at this time, the detection controller 36 of the present invention can prevent the first electronic switch 30 and the second electronic switch 32 from being simultaneously turned on.

Finally, from time t3 to time t4, the signal controller 38 generates a first digital signal D1 of a high-level voltage signal and a second digital signal D2 of a low-level voltage signal at the first end and the second end, respectively. . In the actual situation, there is still a period of time between when the second digital signal D2 is switched to the low level voltage signal and the first digital signal D1 is switched to the high level voltage signal. Since this time is very short, it is omitted in FIG. . During this period of time, the second electronic switch 32 receives the second digital signal D2, so that it is in a closed state, and the resonant current charges the parasitic capacitor 40 to raise the voltage of the node N to a preset voltage value greater than the low voltage. After the period of time, the first digital signal D1 is switched to the high level voltage signal, the PNP dual carrier interface transistor 52 is switched, and the first digital signal D1 is supplied to the first electronic switch 30 through the electrical isolator 41. The first electronic switch 30 is turned on. In this way, by detecting the voltage of the node N by the detecting controller 36, the first electronic switch 30 and the second electronic switch 32 can be alternately switched to avoid the penetration effect. After the time point t4, the first digital signal D1 can also be a low level voltage signal.

Please refer to Figure 6 below. The third embodiment of the resonance control device of the present invention is applied to a full bridge resonant circuit. The resonance control device includes a first electronic switch 60, a second electronic switch 62, a third electronic switch 64, and a fourth electronic switch. 66, a resonant tank 68, a first detecting controller 70, a second detecting controller 72 and a signal controller 74, wherein the first electronic switch 60, the second electronic switch 62, the third electronic switch 64 The fourth electronic switch 66 is, for example, an N-channel metal oxide half field effect transistor. The first electronic switch 60 is electrically connected to a high voltage terminal VH and a first node N1, and the second electronic switch 62 is electrically connected to a low voltage terminal VL, for example, a ground terminal, and the third electronic switch 64 is electrically connected to the high voltage terminal. The VH is electrically connected to the second electronic switch 62, and the fourth electronic switch 66 is electrically connected to the low voltage terminal VL and the first node N1, and the switching states of the third electronic switch 64 and the fourth electronic switch 66 are the same. The fourth electronic switch 66 has a first parasitic capacitance 76, such as a parasitic source capacitance. One end of the first parasitic capacitor 76 is electrically connected to the low voltage terminal VL, and the other end is electrically connected to the first node N1. The resonant tank 68 is electrically connected to the first node N1, the first electronic switch 60, the second electronic switch 62, the third electronic switch 64 and the fourth electronic switch 66. The first detecting controller 70 is electrically connected to the low voltage terminal VL, the first node N1, the first electronic switch 60 and the second electronic switch 62, and receives the first voltage of the first node N1 and a first digital signal D1. When the third electronic switch 64 and the fourth electronic switch 66 are in an on state, the first voltage is a low voltage of the low voltage terminal VL, that is, a ground potential, and the first detecting controller 70 provides a low voltage to the first according to the first voltage. The electronic switch 60 and the second electronic switch 62 cause the first electronic switch 60 and the second electronic switch 62 to be in a closed state, and the high voltage terminal VH generates a first resonant current to sequentially flow through the third electronic switch 64 and resonate. The slot 68, the fourth electronic switch 66 and the low voltage terminal VL. When the third electronic switch 64 and the fourth electronic switch 66 are in a closed state, the first resonant current is charged to the first parasitic capacitor 76 to increase the first voltage to a first preset voltage value greater than the low voltage, the first detective The controller 70 provides the first digital signal D1 to the first electronic switch 60 and the second electronic switch 62 according to the first preset voltage value, so that the first electronic switch 60 and the second electronic switch 62 are in an on state.

When the first electronic switch 60 and the second electronic switch 62 receive the first digital signal D1, the first digital signal D1 is sequentially turned on and off, and the first digital signal D1 includes, for example, a high-level voltage signal and a low level sequentially appearing. Voltage signal. The second detection controller 72 is electrically connected to the second node N2, the third electronic switch 64 and the fourth electronic switch 66 between the low voltage terminal VL, the second electronic switch 62 and the third electronic switch 64. The second electronic switch 62 has a second parasitic capacitance 78, such as a parasitic source capacitance. One end of the second parasitic capacitor 78 is electrically connected to the low voltage terminal VL, the other end is electrically connected to the second node N2, the resonant tank 68 is electrically connected to the second node N2, and the second detecting controller 72 receives the second node N2. The second voltage and the second digital signal D2, the second digital signal D2 include, for example, a high-level voltage signal, a low-level voltage signal, and a high-level voltage signal. When the first electronic switch 60 and the second electronic switch 62 are in an on state, the second voltage is a low voltage, and the high voltage terminal VH generates a second resonant current to sequentially flow through the first electronic switch 60 and the resonant tank 68. The second electronic switch 62 and the low voltage terminal VL, and the second detecting controller 72 provides a low voltage to the third electronic switch 64 and the fourth electronic switch 66 according to the second voltage, so that the third electronic switch 64 and the fourth electronic Switch 66 is in a closed state. When the first electronic switch 60 and the second electronic switch 62 are in a closed state, the second resonant current charges the second parasitic capacitor 78 to increase the second voltage to a second predetermined voltage value greater than the low voltage, and the second The detection controller 72 provides the second digital signal D2 to the third electronic switch 64 and the fourth electronic switch 66 according to the second preset voltage value, so that the third electronic switch 64 and the fourth electronic switch 66 are in an on state.

The signal controller 74 has a first end and a second end. The first end is electrically connected to the first detecting controller 70, and is electrically connected to the first electronic switch 60 and the second electronic switch 62 through an electrical isolator 79. The two ends are electrically connected to the second detecting controller 72, and are electrically connected to the third electronic switch 64 and the fourth electronic switch 66 through the electrical isolator 79, wherein the first electronic switch 60 and the second electronic switch 62 are connected to each other. Differently, the pins of the third electronic switch 64 and the fourth electronic switch 66 are different to properly isolate each other. Here, the electrical isolator 79 also takes a transformer as an example. The electrical isolator 79 blocks the voltage of the high voltage terminal VH from going to the signal controller 74. The signal controller 74 generates the first digital signal D1 at the first end at a time point, and generates a second digital signal D2 at the second end at this time point, and transmits the second digital signal D2 to the third electronic switch 64 through the electrical isolator 79. The four electronic switches 66 control the third electronic switch 64 and the fourth electronic switch 66 to be in an on state, a closed state, and a conductive state in sequence. In order to enable the first digital signal D1 and the second digital signal D2 to be smoothly transmitted, a push-pull circuit composed of a transistor can be appropriately added.

The resonant tank 68 further includes a first resonant inductor 80, a second resonant inductor 82 and a resonant capacitor 84, wherein the second resonant inductor 82 is, for example, a leakage inductance of a transformer. The first resonant inductor 80 is electrically connected to the second node N2, and the second resonant inductor 82 is connected in series with the first resonant inductor 80. The resonant capacitor 84 is connected in series with the second resonant inductor 82 and electrically connected to the first node N1. The first resonant current sequentially flows through the first resonant inductor 80, the second resonant inductor 82, and the resonant capacitor 84. The second resonant current sequentially flows through the resonant capacitor 84, the second resonant inductor 82, and the first resonant inductor 80.

The first detection controller 70 further includes a P-channel MOS field-effect transistor 86 and a diode 88. The gate of the P-channel MOS field-effect transistor 86 is electrically connected to the first node N1, the gate is electrically connected to the low-voltage terminal VL, and the source is electrically connected to the first end of the signal controller 74, and the source is transparent. The electrical isolator 79 is electrically connected to the first electronic switch 60 and the second electronic switch 62 and receives the first digital signal D1. When the first voltage is a low voltage, the P-channel MOS half-effect transistor 86 provides a low voltage to the first electronic switch 60 and the second electronic switch 62 through the electrical isolator 79. When the first voltage is the first predetermined voltage value, the P-channel MOS field-effect transistor 86 provides the first digital signal D1 to the first electronic switch 60 and the second electronic switch 62 through the electrical isolator 79. The anode and the cathode of the diode 88 are electrically connected to the gate of the P-channel MOS field-effect transistor 86 and the first node N1, respectively.

The second detection controller 72 further includes a P-channel MOS field-effect transistor 90 and a diode 92. The gate of the P-channel MOSFET is electrically connected to the second node N2, the drain is electrically connected to the low voltage terminal VL, and the source is electrically connected to the second end of the signal controller 74, and the source is transparent. The isolator 79 is electrically connected to the third electronic switch 64 and the fourth electronic switch 66, and receives the second digital signal D2. When the second voltage is a low voltage, the P-channel MOS half-effect transistor 90 provides a low voltage to the third electronic switch 64 and the fourth electronic switch 66 through the electrical isolator 79. When the second voltage is the second predetermined voltage value, the P-channel MOS field-effect transistor 90 provides the second digital signal D2 to the third electronic switch 64 and the fourth electronic switch 66 through the electrical isolator 79. The anode and the cathode of the diode 92 are electrically connected to the gate of the P-channel MOS field-effect transistor 90 and the second node N2, respectively.

The operation of the third embodiment of the present invention will be described below. Please refer to FIG. 6 and FIG. 7 at the same time. First, from time t0 to time t1, the signal controller 74 generates a first digital signal D1 of a low-level voltage signal and a second digital signal D2 of a high-level voltage signal at the first end and the second end, respectively. . The third electronic switch 64 and the fourth electronic switch 66 receive the second digital signal D2 through the electrical isolator 79, and thus are in an on state. At this time, since the first voltage is a low voltage of the low voltage terminal VL, the P-channel MOS half-effect transistor 86 is turned on, and the first digital signal D1 cannot be a high-level voltage signal, and the first electronic switch 60 and the second electronic switch 62 is in a closed state, and the high voltage terminal VH generates a first resonant current to sequentially flow through the third electronic switch 64, the first resonant inductor 80, the second resonant inductor 82, the resonant capacitor 84, and the fourth electronic switch 66 and low. Voltage terminal VL. In one case, only one of the first digital signal D1 and the second digital signal D2 is a high-level voltage signal. However, the signal controller 74 may first provide a high-level voltage signal due to an error in timing. The digital signal D1, at this time, the apparatus of the present invention can prevent the first electronic switch 60 and the second electronic switch 62 from being turned on, thereby preventing the occurrence of a shoot through phenomenon.

Then, from time t1 to time t2, the signal controller 74 generates a first digital signal D1 of a high-level voltage signal and a second digital signal D2 of a low-level voltage signal at the first end and the second end, respectively. . The third electronic switch 64 and the fourth electronic switch 66 receive the second digital signal D2 through the electrical isolator 79, and thus are in a closed state. At this time, the first resonant current charges the first parasitic capacitor 76 to increase the first voltage to a first predetermined voltage value greater than the low voltage, and the P-channel MOS half-effect transistor 86 transmits the light according to the first preset voltage value. The isolator 79 provides the first digital signal D1 to the first electronic switch 60 and the second electronic switch 62 to bring the first electronic switch 60 and the second electronic switch 62 into a conducting state.

Then, from time t2 to time t3, the signal controller 74 generates a first digital signal D1 of a high-level voltage signal and a second digital signal of a high-level voltage signal at the first end and the second end, respectively. D2. The first electronic switch 60 and the second electronic switch 62 receive the first digital signal D1 through the electrical isolator 79, and thus are in an on state. At this time, since the second voltage is a low voltage, the P-channel MOS half-effect transistor 90 is turned on, so that the third electronic switch 64 and the fourth electronic switch 66 are turned off. In addition, the high voltage terminal VH generates a second resonant current to sequentially flow through the first electronic switch 60, the resonant capacitor 84, the second resonant inductor 82, the first resonant inductor 80, the second electronic switch 62, and the low voltage terminal VL. . In one case, only one of the first digital signal D1 and the second digital signal D2 is a high level voltage signal. However, the signal controller 38 may first provide a high level voltage signal due to an error in timing. The digital signal D1, at this time, the detection controller 36 of the present invention can prevent the first electronic switch 30 and the second electronic switch 32 from being simultaneously turned on.

Finally, from time t3 to time t4, the signal controller 74 generates a first digital signal D1 of a low level voltage signal and a second digital signal D2 of a high level voltage signal at the first end and the second end, respectively. . The first electronic switch 60 and the second electronic switch 62 receive the first digital signal D1 through the electrical isolator 79, and thus are in a closed state. There is still a period of time after the first electronic switch 60 and the second electronic switch 62 are turned off, and since this time is short, it is omitted in FIG. During this time, the second resonant current charges the second parasitic capacitance 78 to boost the second voltage to a second predetermined voltage value greater than the low voltage. Then, the second digital signal D2 is switched to a high level voltage signal, the P channel MOS field 90 is switched, and the second digital signal D2 is supplied to the third electronic switch 64 and the fourth through the electrical isolator 41. The electronic switch 66 causes the third electronic switch 64 and the fourth electronic switch 66 to be in an on state. In this way, by detecting the first voltage of the first node N1 by using the first detecting controller 70, the third electronic switch 64 and the second electronic switch 62 can be alternately switched to avoid the penetration effect. At the same time, the second detection controller 72 is used to detect the second voltage of the second node N2, and the first electronic switch 60 and the fourth electronic switch 66 are also alternately switched to avoid the penetration effect.

Please refer to Figure 8 below. The second embodiment of the resonance control device of the present invention is also applied to a full bridge resonant circuit. The fourth embodiment differs from the third embodiment in the first detection controller 70 and the second detection controller 72. In the fourth embodiment, the first detection controller 70 further includes a PNP bipolar junction transistor 94 and a diode 96. The base of the PNP bipolar junction transistor 94 is electrically connected to the first node N1 through a first resistor 98, and the collector is electrically connected to the low voltage terminal VL, and the emitter is electrically connected to the first end of the signal controller 74. The emitter is electrically connected to the first electronic switch 60 and the second electronic switch 62 through the electrical isolator 79, and is electrically connected to the base through a second resistor 100. The emitter receives the first digital signal D1. When the first voltage is a low voltage, the PNP bipolar junction transistor 94 provides a low voltage to the first electronic switch 60 and the second electronic switch 62 through the electrical isolator 79. When the first voltage is the first predetermined voltage value, the PNP bipolar junction transistor 94 provides the first digital signal D1 to the first electronic switch 60 and the second electronic switch 62 through the electrical isolator 79. The positive electrode and the negative electrode of the diode 96 are electrically connected to the first resistor 98 and the first node N1, respectively.

The second detection controller 72 further includes a PNP bipolar junction transistor 102 and a diode 104. The base of the PNP bipolar junction transistor 102 is electrically connected to the second node N2 through a first resistor 106, and the collector is electrically connected to the low voltage terminal VL, and the emitter is electrically connected to the second end of the signal controller 74. The emitter is electrically connected to the third electronic switch 64 and the fourth electronic switch 66 through the electrical isolator 79, and is electrically connected to the base through a second resistor 108, and the emitter receives the second digital signal D2. When the second voltage is a low voltage, the PNP bipolar junction transistor 102 provides a low voltage to the third electronic switch 64 and the fourth electronic switch 66 through the electrical isolator 79. When the second voltage is the second predetermined voltage value, the PNP dual carrier junction transistor 102 provides the second digital signal D2 to the third electronic switch 64 and the fourth electronic switch 66 through the electrical isolator 79. The anode and the cathode of the diode 104 are electrically connected to the first resistor 106 and the second node N2, respectively.

The operation of the fourth embodiment of the present invention will be described below. Please refer to FIG. 8 and FIG. 7 at the same time. The operation from the time point t0 to the time point t1 is the same as that of the third embodiment, and will not be described again. From the time point t1 to the time point t2, the signal controller 74 generates the first digital signal D1 of the high level voltage signal and the second digital signal D2 of the low level voltage signal at the first end and the second end, respectively. The third electronic switch 64 and the fourth electronic switch 66 receive the second digital signal D2 through the electrical isolator 79, and thus are in a closed state. At this time, the first resonant current charges the first parasitic capacitor 76 to increase the first voltage to a first predetermined voltage value greater than the low voltage, and the PNP bipolar junction transistor 94 provides the first digit through the electrical isolator 79. The signal D1 is given to the first electronic switch 60 and the second electronic switch 62 to bring the first electronic switch 60 and the second electronic switch 62 into an on state.

Then, from time t2 to time t3, the signal controller 74 generates a first digital signal D1 of a high-level voltage signal and a second digital signal of a high-level voltage signal at the first end and the second end, respectively. D2. The first electronic switch 60 and the second electronic switch 62 receive the first digital signal D1 through the electrical isolator 79, and thus are in an on state. At this time, since the second voltage is a low voltage, the PNP bipolar junction transistor 102 is turned on, so that the third electronic switch 64 and the fourth electronic switch 66 are turned off. In addition, the high voltage terminal VH generates a second resonant current to sequentially flow through the first electronic switch 60, the resonant capacitor 84, the second resonant inductor 82, the first resonant inductor 80, the second electronic switch 62, and the low voltage terminal VL. . In one case, only one of the first digital signal D1 and the second digital signal D2 is a high-level voltage signal. However, the signal controller 38 may provide a high-level voltage signal prematurely due to timing errors. The digital signal D1, at this time, the detection controller 36 of the present invention can prevent the first electronic switch 30 and the second electronic switch 32 from being simultaneously turned on.

Finally, from time t3 to time t4, the signal controller 74 generates a first digital signal D1 of a low level voltage signal and a second digital signal D2 of a high level voltage signal at the first end and the second end, respectively. . The first electronic switch 60 and the second electronic switch 62 receive the first digital signal D1 through the electrical isolator 79, and thus are in a closed state. There is still a period of time after the first electronic switch 60 and the second electronic switch 62 are turned off, and since this time is short, it is omitted in FIG. During this time, the second resonant current charges the second parasitic capacitance 78 to boost the second voltage to a second predetermined voltage value greater than the low voltage. Then, the second digital signal D2 is switched to the high level voltage signal, the PNP dual carrier interface transistor 102 is switched, and the second digital signal D2 is supplied to the third electronic switch 64 and the fourth through the electrical isolator 41. The electronic switch 66 causes the third electronic switch 64 and the fourth electronic switch 66 to be in an on state. In this way, by detecting the first voltage of the first node N1 by using the first detecting controller 70, the third electronic switch 64 and the second electronic switch 62 can be alternately switched to avoid the penetration effect. At the same time, the second detection controller 72 is used to detect the second voltage of the second node N2, and the first electronic switch 60 and the fourth electronic switch 66 are also alternately switched to avoid the penetration effect.

In the full-bridge architecture embodiment of the present invention, one detection controller corresponds to two switches, but in actual operation, it can be increased according to requirements, and one detection controller corresponds to one switch.

In summary, the present invention detects a node voltage between two serially connected electronic switches, and when an electronic switch is turned on, discharges its corresponding parasitic capacitance to exhibit a low voltage, thereby driving another electronic switch. It is in a closed state, so that the two electronic switches can operate accurately in an alternate switching manner to avoid the penetration effect and damage the electronic switch. In other words, regardless of whether the signal controller has a false signal, or a switch failure, or a switch operation delay, the detection controller of the present invention ensures that the switch does not pass through due to simultaneous opening.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, so that the shapes, structures, features, and spirits described in the claims of the present invention are equally varied and modified. All should be included in the scope of the patent application of the present invention.

10‧‧‧Signal Controller
12‧‧‧First electronic switch
14‧‧‧Second electronic switch
16‧‧‧Resonance tank
18‧‧‧ Signal Controller
20‧‧‧First electronic switch
22‧‧‧Second electronic switch
24‧‧‧ Third electronic switch
26‧‧‧fourth electronic switch
28‧‧‧Resonance tank
30‧‧‧First electronic switch
32‧‧‧Second electronic switch
34‧‧‧Resonance slot
36‧‧‧Detection controller
38‧‧‧Signal Controller
40‧‧‧Parasitic capacitance
41‧‧‧Electrical isolators
42‧‧‧First resonant inductor
44‧‧‧Second resonant inductor
46‧‧‧Resonance capacitor
48‧‧‧P channel MOS half-field effect transistor
50‧‧‧ diode
52‧‧‧PNP double carrier junction transistor
54‧‧‧ diode
56‧‧‧First resistance
58‧‧‧second resistance
60‧‧‧First electronic switch
62‧‧‧Second electronic switch
64‧‧‧ Third electronic switch
66‧‧‧fourth electronic switch
68‧‧‧Resonance tank
70‧‧‧First detection controller
72‧‧‧Second detection controller
74‧‧‧Signal Controller
76‧‧‧First parasitic capacitance
78‧‧‧Second parasitic capacitance
79‧‧‧Electrical isolators
80‧‧‧First resonant inductor
82‧‧‧Second resonant inductor
84‧‧‧Resonance capacitor
86‧‧‧P channel MOS half-field effect transistor
88‧‧‧ diode
90‧‧‧P-channel MOS half-field effect transistor
92‧‧‧ diode
94‧‧‧PNP double carrier junction transistor
96‧‧‧ diode
98‧‧‧First resistance
100‧‧‧second resistance
102‧‧‧PNP double carrier junction transistor
104‧‧‧ diode
106‧‧‧First resistance
108‧‧‧second resistance

Figure 1 is a circuit diagram of a prior art half bridge drive. Figure 2 is a circuit diagram of a prior art full bridge drive. Fig. 3 is a circuit diagram showing the first embodiment of the resonance control device of the present invention. 4 is a waveform diagram of the first initial digital signal, the second initial digital signal, the first digital signal and the second digital signal, and the switching states of the first electronic switch and the second electronic switch of the present invention. Fig. 5 is a circuit diagram showing a second embodiment of the resonance control device of the present invention. Figure 6 is a circuit diagram showing a third embodiment of the resonance control device of the present invention. Figure 7 is a waveform diagram showing the switching states of the first digital signal and the second digital signal, and the first electronic switch, the second electronic switch, the third electronic switch, and the fourth electronic switch of the present invention. Figure 8 is a circuit diagram showing a fourth embodiment of the resonance control device of the present invention.

30‧‧‧First electronic switch

32‧‧‧Second electronic switch

34‧‧‧Resonance slot

36‧‧‧Detection controller

38‧‧‧Signal Controller

40‧‧‧Parasitic capacitance

41‧‧‧Electrical isolators

42‧‧‧First resonant inductor

44‧‧‧Second resonant inductor

46‧‧‧Resonance capacitor

48‧‧‧P channel MOS half-field effect transistor

50‧‧‧ diode

Claims (25)

A resonance control device includes: a first electronic switch electrically connected to a high voltage terminal and a node; a second electronic switch electrically connected to the node and a low voltage terminal, the second electronic switch having a a parasitic capacitance, one end of the parasitic capacitor is electrically connected to the low voltage end, and the other end is electrically connected to the node; a resonant tank electrically connected to the node and storing resonant energy; and a detecting controller electrically connected The low voltage terminal, the node and the first electronic switch, and receiving the voltage of the node, when the second electronic switch is in an on state, the voltage of the node is a low voltage of the low voltage terminal, the detection control The low voltage is supplied to the first electronic switch according to the voltage of the node, the first electronic switch is turned off, and the resonant tank generates a resonant current through the second electronic switch by using the resonant energy. The resonance control device of claim 1, wherein when the second electronic switch is in a closed state, the resonant current charges the parasitic capacitance to increase the voltage of the node to a predetermined voltage value greater than the low voltage. The detection controller provides a first digital signal to the first electronic switch according to the preset voltage value, so that the first electronic switch is in an on state. The resonant control device of claim 2, further comprising a signal controller having a first end and a second end, wherein the first end is electrically connected to the detecting controller and electrically connected through an electrical isolator Connecting the first electronic switch, the electrical isolator blocks the high voltage of the high voltage end to the signal controller, and the second end is electrically connected to the second electronic switch, the signal controller is at the time point The first digital signal is generated at one end, and a second digital signal is generated at the second end to the second electronic switch to sequentially control the second electronic switch to be in an on state and a closed state. The resonance control device of claim 3, wherein the first electronic switch and the first The two electronic switches are all N-channel MOSFETs, and the parasitic capacitance is a parasitic 电容 source capacitor. The first digital signal includes a high-level voltage signal and a low-level voltage signal, which are sequentially present, and the second digital signal It includes high-level voltage signals and low-level voltage signals that appear in sequence. The resonance control device of claim 1, wherein the resonant tank further comprises: a first resonant inductor electrically connected to the node; a second resonant inductor connected in series with the first resonant inductor and storing the resonant energy And a resonant capacitor connected in series with the second resonant inductor and electrically connected to the low voltage terminal, wherein the first resonant inductor, the second resonant inductor and the resonant capacitor generate the resonant current by using the resonant energy. The resonance control device of claim 2, wherein the detection controller further comprises a P-channel gold-oxygen half-field effect transistor, wherein the gate is electrically connected to the node, and the gate is electrically connected to the low voltage terminal, the source Electrically connecting the first electronic switch and receiving the first digital signal; when the voltage of the node is the low voltage, the P-channel MOS half-effect transistor provides the low voltage to the first electronic switch; When the voltage of the node is the preset voltage value, the P-channel MOS half-effect transistor provides the first digital signal to the first electronic switch. The resonance control device of claim 6, wherein the detection controller further comprises a diode, and the anode and the cathode are electrically connected to the gate and the node, respectively. The resonance control device of claim 2, wherein the detection controller further comprises a PNP dual-carrier junction transistor, wherein the base is electrically connected to the node through a first resistor, and the collector is electrically connected to the low voltage. An emitter electrically connected to the first electronic switch and electrically connected to the base through a second resistor, the emitter receiving the first digital signal; and when the voltage of the node is the low voltage, the PNP The dual carrier junction transistor provides the low voltage to the first electronic switch; when the voltage of the node is the predetermined voltage value, the PNP dual carrier junction transistor provides the first digital signal to the first An electronic switch. The resonance control device of claim 8, wherein the detection controller further comprises a diode, and the anode and the cathode are electrically connected to the first resistor and the node, respectively. A resonance control device comprising: a first electronic switch electrically connected to a high voltage terminal and a first node; a second electronic switch electrically connected to a low voltage terminal; and a third electronic switch electrically Connecting the high voltage terminal and the second electronic switch; a fourth electronic switch electrically connecting the low voltage end to the first node, the third electronic switch and the fourth electronic switch having the same switching state, the fourth The electronic switch has a first parasitic capacitance, one end of the first parasitic capacitance is electrically connected to the low voltage end, and the other end is electrically connected to the first node; a resonant tank electrically connected to the first node, the first electron a switch, the second electronic switch, the third electronic switch, and the fourth electronic switch; and a first detection controller electrically connected to the low voltage terminal, the first node, the first electronic switch, and the first a second electronic switch, and receiving a first voltage of the first node, when the third electronic switch and the fourth electronic switch are in a conducting state, the first voltage is a low voltage of the low voltage end, the first detection Controller The first voltage provides the low voltage to the first electronic switch and the second electronic switch, the first electronic switch and the second electronic switch are in a closed state, and the high voltage terminal generates a first resonant current to The third electronic switch, the resonant tank, the fourth electronic switch and the low voltage terminal are sequentially flowed through. The resonance control device of claim 10, wherein when the third electronic switch and the fourth electronic switch are in a closed state, the first resonant current charges the first parasitic capacitance to increase the first voltage to be greater than the a first preset voltage value of the low voltage, the first detecting controller provides a first digital signal to the first electronic switch and the second electronic switch according to the first preset voltage value, so that the first electronic The switch is in a conducting state with the second electronic switch. The resonance control device of claim 11, wherein when the first electronic switch and the second electronic switch receive the first digital signal, the first and second electronic switches are sequentially turned on and off. The resonance control device of claim 12, further comprising a second detection controller electrically connected to the low voltage terminal, a second node between the second electronic switch and the third electronic switch, The third electronic switch and the fourth electronic switch have a second parasitic capacitance, one end of the second parasitic capacitor is electrically connected to the low voltage end, and the other end is electrically connected to the second node, The resonant tank is electrically connected to the second node, and the second detecting controller receives the second voltage of the second node; when the first electronic switch and the second electronic switch are in the conducting state, the second voltage is The low voltage, and the high voltage terminal generates a second resonant current to sequentially flow through the first electronic switch, the resonant tank, the second electronic switch and the low voltage end, and the second detecting controller And supplying the low voltage to the third electronic switch and the fourth electronic switch according to the second voltage, so that the third electronic switch and the fourth electronic switch are in a closed state. The resonance control device of claim 13, wherein when the first electronic switch and the second electronic switch are in the off state, the second resonant current charges the second parasitic capacitance to increase the second voltage to be greater than a second preset voltage value of the low voltage, and the second detecting controller provides a second digital signal to the third electronic switch and the fourth electronic switch according to the second preset voltage value, so that the first The three electronic switch is in a conducting state with the fourth electronic switch. The resonant control device of claim 14, further comprising a signal controller having a first end and a second end, the first end electrically connected to the first detecting controller and passing through an electrical isolator Electrically connecting the first electronic switch and the second electronic switch, the second end is electrically connected to the second detecting controller, and electrically connected to the third electronic switch and the fourth electronic switch through the electrical isolator The electrical isolator blocks the voltage of the high voltage terminal to the signal controller, and the signal controller generates the first digital signal at the first end at a time point, and generates the second digital signal at the time end. The second digital signal is applied to the third electronic switch and the fourth electronic switch to control the third electronic switch and the fourth electronic switch to sequentially display the conductive state, the closed state and the conductive state. The resonance control device of claim 15, wherein the first electronic switch, the second electronic switch, the third electronic switch, and the fourth electronic switch are both N-channel MOS half-effect transistors, the first parasitic The capacitor and the second parasitic capacitor are parasitic source capacitors, and the first digit signal comprises a high-level voltage signal and a low-level voltage signal sequentially appearing, and the second digit signal comprises a high-level voltage sequentially appearing Signal, low level voltage signal and high level voltage signal. The resonant control device of claim 14, wherein the resonant tank further comprises: a first resonant inductor electrically connected to the second node; a second resonant inductor connected in series with the first resonant inductor; and a resonant capacitor Connecting the second resonant inductor in series and electrically connecting the first node, the first resonant current sequentially flowing through the first resonant inductor, the second resonant inductor and the resonant capacitor, and the second resonant current is sequentially Flowing through the resonant capacitor, the second resonant inductor, and the first resonant inductor. The resonance control device of claim 11, wherein the first detection controller further comprises a P-channel MOS field-effect transistor, wherein the gate is electrically connected to the first node, and the gate is electrically connected to the low voltage. And the source is electrically connected to the first electronic switch and the second electronic switch, and receives the first digital signal; when the first voltage is the low voltage, the P-channel MOS half-effect transistor provides the low The voltage is applied to the first electronic switch and the second electronic switch; when the first voltage is the first predetermined voltage value, the P-channel MOS half-effect transistor provides the first digital signal to the first electronic switch And the second electronic switch. The resonant control device of claim 18, wherein the first detecting controller further comprises a diode, wherein the positive pole and the negative pole are electrically connected to the gate and the first node, respectively. The resonance control device of claim 11, wherein the first detection controller further comprises a PNP bipolar junction transistor, wherein the base is electrically connected to the first node through a first resistor, and the collector is electrically connected. Connected to the low voltage end, the emitter is electrically connected to the first electronic switch and the second electronic switch, and is electrically connected to the base through a second resistor, the emitter receiving the first digital signal; When the voltage is the low voltage, the PNP bipolar junction transistor provides the low voltage to the first electronic switch and the second electronic switch; when the first voltage is the first predetermined voltage value, the The PNP dual carrier junction transistor provides the first digital signal to the first electronic switch and the second electronic switch. The resonance control device of claim 20, wherein the first detection controller further comprises a diode, and the anode and the cathode are electrically connected to the first resistor and the first node, respectively. The resonance control device of claim 14, wherein the second detection controller further comprises a P-channel MOSFET, the gate is electrically connected to the second node, and the gate is electrically connected to the low voltage. The source is electrically connected to the third electronic switch and the fourth electronic switch, and receives the second digital signal; when the second voltage is the low voltage, the P-channel MOS half-effect transistor provides the low The voltage is given to the third electronic switch and the fourth electronic switch; when the second voltage is the second predetermined voltage value, the P-channel MOS half-effect transistor provides the second digital signal to the third electronic switch And the fourth electronic switch. The resonant control device of claim 22, wherein the second detecting controller further comprises a diode, wherein the positive pole and the negative pole are electrically connected to the gate and the second node, respectively. The resonance control device of claim 14, wherein the second detection controller further comprises a PNP dual-carrier junction transistor, wherein the base is electrically connected to the second node through a first resistor, and the collector is electrically connected. Connected to the low voltage end, the emitter is electrically connected to the third electronic switch and the fourth electronic switch, and is electrically connected to the base through a second resistor, the emitter receiving the second digital signal; When the voltage is the low voltage, the PNP bipolar junction transistor provides the low voltage to the third electronic switch and the fourth electronic switch; when the second voltage is the second predetermined voltage value, the The PNP dual carrier junction transistor provides the second digital signal to the third electronic switch and the fourth electronic switch. The resonance control device of claim 24, wherein the second detection controller further comprises a diode, and the anode and the cathode are electrically connected to the first resistor and the second node, respectively.