CN220254360U - Boost circuit and drive circuit - Google Patents
Boost circuit and drive circuit Download PDFInfo
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- CN220254360U CN220254360U CN202321324950.0U CN202321324950U CN220254360U CN 220254360 U CN220254360 U CN 220254360U CN 202321324950 U CN202321324950 U CN 202321324950U CN 220254360 U CN220254360 U CN 220254360U
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Abstract
The present utility model relates to the field of electronic circuits, and in particular, to a booster circuit and a driving circuit. The booster circuit includes: the energy storage device comprises an energy storage element, a switch control module, n+1 inductors and n+1 switch modules, wherein N is a positive integer; the first end of the first inductor is a positive input end of the boost circuit, the second end of the nth inductor is respectively connected with the first end of the nth switch module and the first end of the n+1th inductor, and the connection point among the second end of the n+1th inductor, the first end of the n+1th switch module and the positive electrode of the energy storage element is an output end of the boost circuit; the switch control module is respectively connected with the control ends of the N+1 switch modules, and the negative electrode of the energy storage element and the second end of the switch module are grounded. The utility model adopting the scheme can realize the miniaturization type selection of the inductor.
Description
Technical Field
The present utility model relates to the field of electronic circuits, and in particular, to a booster circuit and a driving circuit.
Background
The input voltage can be boosted and regulated by repeating energy storage and energy release operations on the inductor in the inductor boosting circuit, so that the active power and the electric energy utilization rate are improved. In the related art, only one inductor and one control circuit for realizing the operation of repeatedly storing and discharging energy of the inductor are adopted in the inductor boosting circuit. However, as the voltage value to be increased gradually increases, the specification parameters of the type to be selected during the inductor type selection also gradually increase, which results in gradually increasing the volume of the inductor, and is not beneficial to the miniaturization design of the inductor booster circuit.
Disclosure of Invention
The utility model provides a booster circuit and a terminal, and mainly aims to realize miniaturized selection of an inductor.
According to an aspect of the present utility model, there is provided a booster circuit including: the energy storage device comprises an energy storage element, a switch control module, n+1 inductors and n+1 switch modules, wherein N is a positive integer; wherein,
the n+1 inductors are connected in series, the first end of the first inductor is the positive input end of the boost circuit, the second end of the nth inductor is respectively connected with the first end of the nth switch module and the first end of the n+1 inductor, and the connection points among the second end of the n+1 inductor, the first end of the n+1 switch module and the positive electrode of the energy storage element are the output end of the boost circuit;
the switch control module is respectively connected with the control ends of the N+1 switch modules, and the negative electrode of the energy storage element and the second end of the switch module are grounded.
Optionally, in one embodiment of the present utility model, the boost circuit further includes a first diode; wherein,
the positive electrode of the first diode is respectively connected with the second end of the (N+1) th inductor and the first end of the (N+1) th switch module, and the negative electrode of the first diode is connected with the positive electrode of the energy storage element.
Optionally, in one embodiment of the present utility model, the switch module includes a switch, a first resistor, and a safety element; wherein,
the first end of the switch is the first end of the switch module, the second end of the switch is connected with the first end of the safety element, the second end of the safety element is the second end of the switch module, the control end of the switch is connected with the first end of the first resistor, and the second end of the first resistor is the control end of the switch module.
Optionally, in one embodiment of the utility model, the switching module further comprises a second diode; wherein,
the positive pole of the second diode is connected with the second end of the switch, and the negative pole of the second diode is connected with the first end of the safety element.
Optionally, in an embodiment of the present utility model, the switch is an insulated gate bipolar transistor.
Optionally, in one embodiment of the present utility model, the boost circuit further includes a second resistor, a current detection module, and a fault detection module; wherein,
the connection point between the first end of the second resistor and the positive input end of the current detection module is the negative input end of the boost circuit, the second end of the second resistor is respectively connected with the negative input end of the current detection module and the second end of the first switch module, and the output end of the current detection module is connected with the input end of the fault detection module.
Optionally, in one embodiment of the present utility model, the current detection module includes a first dc power supply, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a first comparator; wherein,
the first end of the third resistor is a positive input end of the current detection module, the second end of the third resistor is respectively connected with the positive input end of the first comparator, the first end of the fourth resistor and the first end of the fifth resistor, the second end of the fourth resistor is connected with the first direct current power supply, and the second end of the fifth resistor is grounded;
the first end of the sixth resistor is a negative input end of the current detection module, the second end of the sixth resistor is respectively connected with the negative input end of the first comparator and the first end of the seventh resistor, and a connection point between the second end of the seventh resistor and the output end of the first comparator is an output end of the current detection module;
the power end of the first comparator is connected with the first direct current power supply, and the grounding end of the first comparator is grounded.
Optionally, in one embodiment of the present utility model, the fault detection module includes a second dc power supply, a third dc power supply, a second comparator, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor; wherein,
the first end of the eighth resistor is the first end of the fault detection module, the second end of the eighth resistor is connected with the positive input end of the second comparator, the first end of the ninth resistor is connected with the second direct current power supply, the second end of the ninth resistor is respectively connected with the negative input end of the second comparator and the first end of the tenth resistor, the second end of the tenth resistor is grounded, the output end of the second comparator is respectively connected with the first end of the eleventh resistor and the first end of the twelfth resistor, the second end of the eleventh resistor is connected with the second direct current power supply, and the second end of the twelfth resistor is the output end of the fault detection module;
the power end of the second comparator is connected with the third direct current power supply, and the grounding end of the second comparator is grounded.
According to another aspect of the present utility model, there is provided a driving circuit including: a power module, a control module, and a boost circuit as in any of the preceding aspects, wherein,
the power supply module is connected with the input end of the booster circuit, the output end of the booster circuit is the output end of the driving circuit, and the control module is connected with the switch control module in the booster circuit.
Optionally, in an embodiment of the present utility model, the control module is further connected to an output of the current detection module and an output of the fault detection module.
In summary, in one or more embodiments of the present disclosure, a boost circuit includes an energy storage element, a switch control module, n+1 inductors, and n+1 switch modules, where N is a positive integer; the first end of the first inductor is a positive input end of the boost circuit, the second end of the nth inductor is respectively connected with the first end of the nth switch module and the first end of the n+1th inductor, and the connection point among the second end of the n+1th inductor, the first end of the n+1th switch module and the positive electrode of the energy storage element is an output end of the boost circuit; the switch control module is respectively connected with the control ends of the N+1 switch modules, and the negative electrode of the energy storage element and the second end of the switch module are grounded. Therefore, the combination of one inductor and one control circuit is replaced by the combination of a plurality of inductors and a plurality of switch control modules, and the voltage value required to be lifted by the existing one inductor is lifted through the plurality of inductors, so that specification parameters of the type required to be selected during inductor type selection can be reduced, the miniaturization type selection of the inductor can be realized, and the miniaturization design of the boost circuit is realized.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic background diagram of an inductance boost circuit according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a boost circuit according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of another boost circuit according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of a structure of a boost circuit according to another embodiment of the present utility model.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. On the contrary, the embodiments of the utility model include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.
Fig. 1 is a schematic background diagram of an inductance boost circuit according to an embodiment of the present utility model. As shown in fig. 1, the inductance boosting circuit adopts an inductance and a control circuit for realizing the repeated energy storage and energy release operation of the inductance, namely an insulated gate bipolar transistor circuit (Insulated Gate Bipolar Transistor, IGBT), so as to realize the effect of boosting and outputting the input voltage.
It is easy to understand that as the voltage value to be raised gradually increases, the specification parameters of the model to be selected in the inductor model selection gradually increase. For example, if the voltage 220×1.414=311V of the mains supply half-wave rectified voltage is raised to 360V of the target voltage, the inductor needs to be raised to 49V, so that in order to meet the technical requirements, the inductor needs to be selected from a model with larger specification parameters, which results in larger inductor volume, and is inconvenient for miniaturization design of the printed circuit board (printed circuit board, PCB) corresponding to the inductor booster circuit.
The present utility model will be described in detail with reference to specific examples.
Fig. 2 is a schematic diagram of a boost circuit according to an embodiment of the present utility model.
As shown in fig. 2, the booster circuit includes: the energy storage device comprises an energy storage element, a switch control module, n+1 inductors and n+1 switch modules, wherein N is a positive integer; wherein,
the n+1 inductors are connected in series, the first end of the first inductor L1 is a positive input end VIN+ of the boost circuit, the second end of the Nth inductor LN is respectively connected with the first end of the Nth switch module (switch module N) and the first end of the n+1th inductor LN+1, and the connection point among the second end of the n+1th inductor LN+1, the first end of the n+1th switch module (switch module N+1) and the positive electrode of the energy storage element is an output end VOUT of the boost circuit;
the switch control module is respectively connected with the control ends of the N+1 switch modules, and the negative electrode of the energy storage element and the second end of the switch module are grounded to GND.
According to some embodiments, the energy storage element is used to provide a stable voltage and current output for the subsequent stage circuit. The energy storage element may be, for example, an energy storage capacitor. The latter stage circuit includes, but is not limited to, high power circuits such as compressors, fans, etc.
In some embodiments, when the boost circuit is a power factor correction (PowerFactorCorrection, PFC) circuit, the inductance is a PFC inductance. PFC refers to adjusting through a circuit structure, and is used for improving power factors in a circuit, reducing reactive power in the circuit and achieving the effect of improving power conversion. In short, the PFC circuit is used to save more power. PFC circuits may be used in power products or power modules in electronic devices.
In some embodiments, as shown in FIG. 1, the second terminal of the first switching module is the negative input terminal VIN-of the boost circuit.
According to some embodiments, the switch control module is configured to control an on-off state of each of the n+1 switch modules.
In some embodiments, the switch control module controls the on-off state of each of the n+1 switch modules in a synchronous on-off manner. That is, the switch control module controls the n+1 switch modules to be in the on state at the same time, or the switch control module controls the n+1 switch modules to be in the off state at the same time.
According to some embodiments, when the nth switch module is in a conductive state, the second end of the nth inductor corresponds to the ground GND, and at this time, the nth inductor charges and stores energy. Similarly, when the n+1th switch module is in the on state, the second end of the n+1th inductor is equivalent to the ground GND, and at this time, the n+1th inductor charges and stores energy.
When the N+1 switch modules are in the off state, the N+1 inductors can discharge energy to charge the energy storage element at the same time. At this time, the first inductor L1 realizes one-stage boosting, the second inductor L2 realizes two-stage boosting on the basis of the output voltage of the first inductor L1, and the n+1th inductor ln+1 realizes n+1th boosting on the basis of the output voltage of the nth inductor LN.
It is easy to understand that, at this time, if the voltage 311V after the half-wave rectification of the mains supply needs to be raised to the target voltage 360V, the single inductor only needs to be raised by 49/n+1, and the number of specific inductors can be selected according to practical situations. Therefore, smaller-specification inductors can be selected for inductor selection, and inductor miniaturization selection is realized.
Optionally, fig. 3 is a schematic structural diagram of a boost circuit according to an embodiment of the present utility model. As shown in fig. 3, the boost circuit further includes a first diode D1; wherein,
the positive pole of first diode D1 is connected with the second end of the n+1th inductance LN+1 and the first end of the n+1th switch module (switch module N+1) respectively, and the negative pole of first diode D1 is connected with the positive pole of energy storage component.
It is easy to understand that the first diode D1 is disposed between the second end of the n+1th inductor ln+1 and the positive electrode of the energy storage element, so that the energy storage element can be prevented from reversely outputting current to the front-stage circuit, i.e., the n+1 inductors and the n+1 switch modules of the front-stage, and the safety and reliability of the boost circuit can be improved.
Optionally, the switch module includes a switch, a first resistor, and a safety element; wherein,
the first end of the switch is the first end of the switch module, the second end of the switch is connected with the first end of the safety element, the second end of the safety element is the second end of the switch module, the control end of the switch is connected with the first end of the first resistor, and the second end of the first resistor is the control end of the switch module.
According to some embodiments, the switching module further comprises a second diode; wherein,
the positive pole of the second diode is connected with the second end of the switch, and the negative pole of the second diode is connected with the first end of the safety element.
With a scenario as an example, fig. 4 is a schematic structural diagram of a boost circuit according to an embodiment of the present utility model. As shown in fig. 4, the boost circuit includes only the first inductor L1 and the second inductor L2, and at this time, only the second diode D2 is provided in the first switching module.
Optionally, in one embodiment of the utility model, the switch is an insulated gate bipolar transistor IGBT.
According to some embodiments, as shown in fig. 4, the switch in the first switch module is IGBT1, the first resistor in the first switch module is R35, the collector C of the IGBT1 is the first end of the first switch module, the emitter E of the IGBT1 is connected to the anode of the second diode D2, and the gate G of the IGBT1 is connected to the first end of R35. The switch in the second switch module is IGBT2, and first resistance in the second switch module is R34, and the insurance component in the second switch module is RFU1, and IGBT 2's collecting electrode C is the first end of second switch module, and IGBT 2's projecting pole E is connected with the first end of RFU1, and IGBT 2's grid G is connected with the first end of R34.
In some embodiments, as shown in fig. 4, the switch control module includes an IC1, where the OUT1 terminal of the IC1 is connected to the second terminal of R34, and the OUT2 terminal of the IC1 is connected to the second terminal of R35. The IN terminal of IC1 may receive the PWM drive signal.
Optionally, in one embodiment of the present utility model, as shown in fig. 4, the boost circuit further includes a second resistor R36, a current detection module, and a fault detection module; wherein,
the connection point between the first end of the second resistor R36 and the positive input end of the current detection module is a negative input end VIN-of the boost circuit, the second end of the second resistor R36 is respectively connected with the negative input end of the current detection module and the second end of the first switch module, and the output end of the current detection module is connected with the input end of the fault detection module.
According to some embodiments, as shown in fig. 4, the current detection module includes a first dc power supply, a third resistor R44, a fourth resistor R51, a fifth resistor R53, a sixth resistor R41, a seventh resistor R37, and a first comparator; wherein,
the first end of the third resistor R44 is a positive input end of the current detection module, the second end of the third resistor R44 is respectively connected with the positive input end of the first comparator, the first end of the fourth resistor R51 and the first end of the fifth resistor R53, the second end of the fourth resistor R51 is connected with the first direct current power supply, and the second end of the fifth resistor R53 is grounded to GND;
the first end of the sixth resistor R41 is a negative input end of the current detection module, the second end of the sixth resistor R41 is respectively connected with the negative input end of the first comparator and the first end of the seventh resistor R37, and a connection point between the second end of the seventh resistor R37 and the output end of the first comparator is an output end of the current detection module;
the power end of the first comparator is connected with the first direct current power supply, and the grounding end of the first comparator is grounded to GND.
In some embodiments, as shown in fig. 4, the first dc power source is a +5v dc power source.
According to some embodiments, as shown in fig. 4, the fault detection module includes a second dc power supply, a third dc power supply, a second comparator, an eighth resistor R62, a ninth resistor R58, a tenth resistor R75, an eleventh resistor R61, and a twelfth resistor R65; wherein,
the first end of the eighth resistor R62 is a first end of a fault detection module, the second end of the eighth resistor R62 is connected with the positive input end of the second comparator, the first end of the ninth resistor R58 is connected with the second direct current power supply, the second end of the ninth resistor R58 is respectively connected with the negative input end of the second comparator and the first end of the tenth resistor R75, the second end of the tenth resistor R75 is grounded GND, the output end of the second comparator is respectively connected with the first end of the eleventh resistor R61 and the first end of the twelfth resistor R65, the second end of the eleventh resistor R61 is connected with the second direct current power supply, and the second end of the twelfth resistor R65 is an output end of the fault detection module;
the power end of the second comparator is connected with a third direct current power supply, and the grounding end of the second comparator is grounded.
In some embodiments, as shown in fig. 4, the second dc power source is a +5v dc power source. The third DC power supply is a +15V DC power supply.
In summary, the boost circuit provided by the embodiment of the utility model comprises an energy storage element, a switch control module, n+1 inductors and n+1 switch modules, wherein N is a positive integer; the first end of the first inductor is a positive input end of the boost circuit, the second end of the nth inductor is respectively connected with the first end of the nth switch module and the first end of the n+1th inductor, and the connection point among the second end of the n+1th inductor, the first end of the n+1th switch module and the positive electrode of the energy storage element is an output end of the boost circuit; the switch control module is respectively connected with the control ends of the N+1 switch modules, and the negative electrode of the energy storage element and the second end of the switch module are grounded. Therefore, the combination of one inductor and one control circuit is replaced by the combination of a plurality of inductors and a plurality of switch control modules, and the voltage value required to be lifted by the existing one inductor is lifted through the plurality of inductors, so that specification parameters of the type required to be selected during inductor type selection can be reduced, the miniaturization type selection of the inductor can be realized, and the miniaturization design of the boost circuit is realized.
The embodiment of the utility model also provides a driving circuit.
Specifically, the driving circuit includes: a power supply module, a control module, and a boost circuit as in any of the above embodiments, wherein,
the power module is connected with the input end of the booster circuit, the output end of the booster circuit is the output end of the driving circuit, and the control module is connected with the switch control module in the booster circuit.
According to some embodiments, as shown in fig. 4, the positive pole of the power module is connected to the positive input terminal vin+ of the boost circuit, and the negative pole of the power module is connected to the negative input terminal VIN-of the boost circuit.
Optionally, in an embodiment of the present utility model, the control module is further connected to an output of the current detection module and an output of the fault detection module.
In summary, in the driving circuit provided by the embodiment of the utility model, the combination of one inductor and one control circuit in the boost circuit is replaced by the combination of a plurality of inductors and a plurality of switch control modules, and the voltage value required to be lifted by the existing one inductor is lifted through the plurality of inductors, so that the specification parameters of the model required to be selected during the inductor model selection can be reduced, the miniature model selection of the inductor can be realized, and the miniature design of the circuit is realized.
Claims (10)
1. A booster circuit, characterized by comprising: the energy storage device comprises an energy storage element, a switch control module, n+1 inductors and n+1 switch modules, wherein N is a positive integer; wherein,
the n+1 inductors are connected in series, the first end of the first inductor is the positive input end of the boost circuit, the second end of the nth inductor is respectively connected with the first end of the nth switch module and the first end of the n+1 inductor, and the connection points among the second end of the n+1 inductor, the first end of the n+1 switch module and the positive electrode of the energy storage element are the output end of the boost circuit;
the switch control module is respectively connected with the control ends of the N+1 switch modules, and the negative electrode of the energy storage element and the second end of the switch module are grounded.
2. The boost circuit of claim 1, wherein said boost circuit further comprises a first diode; wherein,
the positive electrode of the first diode is respectively connected with the second end of the (N+1) th inductor and the first end of the (N+1) th switch module, and the negative electrode of the first diode is connected with the positive electrode of the energy storage element.
3. The boost circuit of claim 1 wherein the switch module comprises a switch, a first resistor, and a fuse element; wherein,
the first end of the switch is the first end of the switch module, the second end of the switch is connected with the first end of the safety element, the second end of the safety element is the second end of the switch module, the control end of the switch is connected with the first end of the first resistor, and the second end of the first resistor is the control end of the switch module.
4. The boost circuit of claim 3 wherein the switching module further comprises a second diode; wherein,
the positive pole of the second diode is connected with the second end of the switch, and the negative pole of the second diode is connected with the first end of the safety element.
5. A boost circuit according to claim 3 wherein the switch is an insulated gate bipolar transistor.
6. The boost circuit of claim 1, wherein the boost circuit further comprises a second resistor, a current detection module, and a fault detection module; wherein,
the connection point between the first end of the second resistor and the positive input end of the current detection module is the negative input end of the boost circuit, the second end of the second resistor is respectively connected with the negative input end of the current detection module and the second end of the first switch module, and the output end of the current detection module is connected with the input end of the fault detection module.
7. The boost circuit of claim 6 wherein the current detection module comprises a first dc power supply, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a first comparator; wherein,
the first end of the third resistor is a positive input end of the current detection module, the second end of the third resistor is respectively connected with the positive input end of the first comparator, the first end of the fourth resistor and the first end of the fifth resistor, the second end of the fourth resistor is connected with the first direct current power supply, and the second end of the fifth resistor is grounded;
the first end of the sixth resistor is a negative input end of the current detection module, the second end of the sixth resistor is respectively connected with the negative input end of the first comparator and the first end of the seventh resistor, and a connection point between the second end of the seventh resistor and the output end of the first comparator is an output end of the current detection module;
the power end of the first comparator is connected with the first direct current power supply, and the grounding end of the first comparator is grounded.
8. The boost circuit of claim 6 wherein the fault detection module comprises a second dc power supply, a third dc power supply, a second comparator, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor; wherein,
the first end of the eighth resistor is the first end of the fault detection module, the second end of the eighth resistor is connected with the positive input end of the second comparator, the first end of the ninth resistor is connected with the second direct current power supply, the second end of the ninth resistor is respectively connected with the negative input end of the second comparator and the first end of the tenth resistor, the second end of the tenth resistor is grounded, the output end of the second comparator is respectively connected with the first end of the eleventh resistor and the first end of the twelfth resistor, the second end of the eleventh resistor is connected with the second direct current power supply, and the second end of the twelfth resistor is the output end of the fault detection module;
the power end of the second comparator is connected with the third direct current power supply, and the grounding end of the second comparator is grounded.
9. A driving circuit, characterized by comprising: a power supply module, a control module and a boost circuit according to any one of claims 1 to 8, wherein,
the power supply module is connected with the input end of the booster circuit, the output end of the booster circuit is the output end of the driving circuit, and the control module is connected with the switch control module in the booster circuit.
10. The drive circuit of claim 9, wherein the control module is further coupled to an output of the current detection module and an output of the fault detection module.
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| CN202321324950.0U CN220254360U (en) | 2023-05-24 | 2023-05-24 | Boost circuit and drive circuit |
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| CN202321324950.0U CN220254360U (en) | 2023-05-24 | 2023-05-24 | Boost circuit and drive circuit |
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