CN218335325U - Drive circuit, heat abstractor and equipment - Google Patents
Drive circuit, heat abstractor and equipment Download PDFInfo
- Publication number
- CN218335325U CN218335325U CN202221979298.1U CN202221979298U CN218335325U CN 218335325 U CN218335325 U CN 218335325U CN 202221979298 U CN202221979298 U CN 202221979298U CN 218335325 U CN218335325 U CN 218335325U
- Authority
- CN
- China
- Prior art keywords
- circuit
- driving
- triode
- unit
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010521 absorption reaction Methods 0.000 claims abstract description 48
- 238000004146 energy storage Methods 0.000 claims abstract description 41
- 230000017525 heat dissipation Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 50
- 230000003321 amplification Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 13
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 8
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 8
- 230000000740 bleeding effect Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Landscapes
- Electronic Switches (AREA)
Abstract
The application relates to the technical field of power electronics, in particular to a driving circuit, a heat dissipation device and equipment. The driving circuit comprises a voltage conversion circuit and a stress absorption circuit; the voltage conversion circuit comprises a first switch unit, an energy storage unit and a discharge unit; the first end of the first switch unit is used for being connected with a first power supply, and the second end of the first switch unit is connected with the first end of the energy storage unit; the driving voltage is used for driving a corresponding load; the first end of the bleeder unit is connected with the first end of the energy storage unit, and the second end of the bleeder circuit is grounded; the stress absorption circuit comprises a stress absorption circuit, a first end of the stress absorption circuit is used for receiving a driving signal, a second end of the stress absorption circuit is connected with the first end of the release unit, and a third end of the stress absorption circuit is used for grounding; the stress absorption circuit is used for absorbing the peak voltage generated when the first switch unit is conducted when the driving signal is received. The stress absorption circuit is arranged in the driving circuit, so that the driving circuit can be ensured to work stably.
Description
Technical Field
The utility model relates to a power electronic technology field especially relates to a drive circuit, heat abstractor and equipment.
Background
Most load driving circuits used in the market are built on the basis of triodes, but the triodes are limited in load carrying capacity and peak voltage exists in the existing driving circuits, so that the driving circuits are unstable in operation.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a drive circuit, heat abstractor and equipment to the solution leads to the unstable problem of drive circuit work because of there being peak voltage in drive circuit.
According to a first aspect, the present application provides a driving circuit comprising:
a voltage conversion circuit and a stress absorption circuit;
the voltage conversion circuit comprises a first switch unit, an energy storage unit and a discharge unit; the control end of the first switch unit is used for receiving a driving signal, the first end of the first switch unit is used for being connected with a first power supply, and the second end of the first switch unit is connected with the first end of the energy storage unit; the second end of the energy storage unit is used as the output end of the driving circuit to output driving voltage; the driving voltage is used for driving a corresponding load; the first end of the bleeder circuit is connected with the first end of the energy storage unit, and the second end of the bleeder circuit and the third end of the energy storage unit are grounded;
the stress absorption circuit comprises a stress absorption circuit, a first end of the stress absorption circuit is used for receiving the driving signal, a second end of the stress absorption circuit is connected with a first end of the bleeder unit, and a third end of the stress absorption circuit is used for grounding; the stress absorption circuit is used for absorbing spike voltage generated by the conduction of the first switch unit when the driving signal is received.
Further, the first switch unit includes a first resistor and a first MOS transistor, wherein,
the first end of the first resistor is connected with the control end of the first MOS transistor, and the second end of the first resistor is used for being connected with the first power supply;
the first end of the first MOS tube is used as the first end of the first switch unit, and the second end of the first MOS tube is used as the second end of the first switch unit.
Furthermore, the stress absorption circuit comprises a first triode, a second MOS tube and a first capacitor;
the first end of the first triode is used for being connected with a second power supply, the control end of the first triode is connected with the control end of the second triode and serves as the first end of the stress absorption circuit, and the second end of the first triode is connected with the second end of the second triode and the control end of the second MOS tube;
the first end of the second triode is used as the third end of the stress absorption circuit;
the second end of the second MOS tube is connected with the first end of the first capacitor, and the first end of the second MOS tube is grounded;
and the second end of the first capacitor is used as the second end of the stress absorption circuit.
Further, the stress absorbing circuit further comprises:
a first end of the first current limiting resistor is connected with a first end of the stress absorption circuit, and a second end of the first current limiting resistor is used for receiving the driving signal;
and the second current-limiting resistor is respectively connected with the second end of the first triode and the control end of the second MOS tube.
Further, the energy storage unit comprises an inductance, wherein,
the first end of the inductor is used as the first end of the energy storage unit, and the second end of the inductor is used as the second end of the energy storage unit.
Further, the energy storage unit comprises a second capacitor;
the first end of the second capacitor is connected with the second end of the inductor, the second end of the second capacitor is used as the third end of the energy storage unit, and the second capacitor is used for storing and filtering the driving voltage.
Further, the bleeder unit comprises a diode, a cathode of the diode is used as a first end of the bleeder unit, the cathode of the diode is connected with the first end of the inductor, an anode of the diode is used as a second end of the bleeder unit, and the anode of the diode is connected with the second end of the second capacitor.
Further, the driving circuit further comprises a signal amplifying circuit; the signal amplifying circuit comprises a third triode, a third current limiting resistor, a third capacitor and a second resistor, wherein,
a base electrode of the third triode is used for receiving the driving signal, an emitting electrode of the third triode is used for being grounded, and a collector electrode of the third triode is connected with a control end of the first switch unit;
the first end of the third current-limiting resistor is used for receiving the driving signal, and the second end of the third current-limiting resistor is connected with the first end of the third capacitor, the first end of the second resistor and the control end of the third triode;
and the second end of the third capacitor and the second end of the second resistor are connected with the third emitter of the third triode.
According to a second aspect, the present application provides a heat dissipation device comprising:
a fan; and a drive circuit as described above; the fan is used as a load of the driving circuit.
According to a third aspect, the application provides an apparatus comprising:
the heat dissipating device as described above; and the control circuit is used for outputting a driving signal to the driving circuit of the heat dissipation device.
The application provides a drive circuit, through setting up the stress absorption circuit, switch on as the first switch unit among the voltage conversion circuit, and when producing peak voltage, by the peak voltage that produces when the stress absorption circuit absorbs the first switch unit and switches on, avoid the too big component among the damage drive circuit of peak voltage, it can guarantee drive circuit job stabilization to set up the stress absorption circuit in drive circuit.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic structural diagram of a driving circuit provided in the present application;
FIG. 2 is a circuit schematic of a driver circuit provided in an alternative embodiment of the present application;
FIG. 3 is a circuit schematic of a driver circuit provided in an alternative embodiment of the present application;
FIG. 4 is a circuit schematic of a driver circuit provided in an alternative embodiment of the present application;
FIG. 5 is a circuit schematic of a driver circuit provided in an alternative embodiment of the present application;
FIG. 6 is a circuit schematic of a driver circuit provided in an alternative embodiment of the present application;
FIG. 7 is a circuit schematic of a driver circuit provided in an alternative embodiment of the present application;
FIG. 8 is a schematic structural diagram of a heat dissipation device provided herein;
fig. 9 is a schematic structural diagram of an apparatus provided in the present application.
Reference numerals:
10-a voltage conversion circuit; 20-a stress absorbing circuit; 30-a signal amplification circuit;
101-a first switching unit; 102-an energy storage unit; 103-a bleeding unit;
q1-a first triode; q2-a second triode; q3-a third triode;
m1-a first MOS tube; m2-a second MOS tube; r1-a first resistor;
r2-a first current limiting resistor; r3-a second current limiting resistor; r4-a third current limiting resistor;
r5-a second resistor; c1-a first capacitor; c2-a second capacitor;
c3-third capacitance; d1-diode; l1-inductance;
VCC1 — first power supply; VCC 2-second power supply; GND-ground.
Detailed Description
Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments, and its several details are capable of modification in various other respects, all without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. They may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to specific situations.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and a repetitive description thereof will be omitted.
It should be noted that the driving circuit provided in this embodiment of the present application may be disposed between the control circuit and the load, an input end of the driving circuit receives the driving signal output by the control circuit, and an output end of the driving circuit is connected to the load, and drives the load to operate according to the driving signal. The driving signal may be a pulse width modulation signal, the load may be a fan, a motor, or other devices, and the control circuit may be a circuit composed of a programmable chip or a circuit built by a separate element and having a control function. IN the drawing, a drive signal output from the control circuit is denoted by IN, and a signal output from the drive circuit to the load is denoted by OUT.
A driving circuit provided in an embodiment of the present application is, as shown in fig. 1, a schematic structural diagram of the driving circuit provided in the present application, and the driving circuit includes: a voltage conversion circuit 10 and a stress absorbing circuit 20. The voltage converting circuit 10 may include a first switching unit 101, an energy storage unit 102, and a bleeding unit 103.
In the voltage conversion circuit 10, a control terminal of a first switch unit 101 is configured to receive a driving signal, a first terminal of the first switch unit 101 is configured to be connected to a first power VCC1, and a second terminal of the first switch unit 101 is connected to a first terminal of an energy storage unit 102; a second end of the energy storage unit 102 is used as an output end of the driving circuit to output a driving voltage; the driving voltage is used for driving a corresponding load; the first end of the bleeding unit 103 is connected to the first end of the energy storage unit 102, and the second end of the bleeding unit and the third end of the energy storage unit are grounded.
In the stress absorption circuit 20, a first end of the stress absorption circuit 20 is used for receiving a driving signal, a second end of the stress absorption circuit 20 is connected with a first end of the bleeder unit 103, and a third end of the stress absorption circuit 20 is used for grounding; stress absorption circuit 20 the stress absorption circuit 20 is configured to absorb a spike voltage generated by the first switch unit 101 turning on when receiving the driving signal.
In this embodiment of the application, the driving signal received by the control terminal of the first switching unit 101 is a pulse width modulation signal PWM, when the driving signal is at a high level, the first switching unit 101 is turned on, and when the driving signal is at a low level, the first switching unit 101 is turned off, and the first switching unit 101 charges the energy storage unit 102 and supplies power to the load by the first power VCC1 by receiving the driving signal converted from the high level to the low level; when the first switch unit 101 no longer receives the driving signal, the energy storage unit 102 supplies follow current to the load, so as to ensure that the load works normally. However, when the received PWM signal PWM is at a high level and the first switch unit 101 is turned on, a spike voltage may be applied to the bleeder unit 103, so as to prevent the higher spike voltage from damaging the bleeder unit 103 and further affecting the stability of the driving circuit and the load operation, the stress absorption circuit 20 is provided in the embodiment of the present application, so that when the first switch unit 101 is turned on, the spike voltage is absorbed by the stress absorption circuit 20, and the stable operation of the driving circuit is ensured. Specifically, when the first switch unit 101 is turned on, the first power source VCC1 outputs a supply voltage, and the turning on of the first switch unit 101 causes the supply voltage to appear instantaneously, thereby forming the spike voltage.
In addition, in this embodiment, the energy storage unit 102 is connected to the second end of the first switch unit 101, and one or more loads with different driving voltages are driven by controlling the on-state voltage of the first switch unit 101, so as to further improve the flexibility of the driving circuit.
The driving circuit provided by the embodiment of the application, through setting the stress absorption circuit 20, when the first switch unit 101 in the voltage conversion circuit 10 is turned on and the first power VCC1 outputs the peak voltage, the stress absorption circuit 20 absorbs the peak voltage generated when the first switch unit 101 is turned on, thereby avoiding the element in the driving circuit from being damaged due to the excessive peak voltage, and it can be seen that the stress absorption circuit 20 is set in the driving circuit to ensure the stable operation of the driving circuit.
An optional driving circuit provided in the embodiment of the present application is, as shown in fig. 2, a circuit schematic diagram of the driving circuit provided in the optional embodiment of the present application.
In the driving circuit provided in this embodiment, the first switching unit 101 includes a first resistor R1 and a first MOS transistor M1.
A first end of the first MOS transistor M1 is connected to the first power source VCC1 as a first end of the first switch unit 101, a second end of the first MOS transistor M1 is connected to the energy storage unit 102, the bleeder unit 103 and the stress absorption circuit 20 as a second end of the first switch unit 101, and a control end of the first MOS transistor M1 is configured to receive a driving signal.
In the embodiment of the application, the driving signal drives the load by controlling the on or off of the first MOS transistor M1.
Optionally, the first MOS transistor M1 may be a PMOS transistor. When the first MOS transistor M1 is a PMOS transistor, the source terminal of the MOS transistor is connected to the power supply.
The first end of the first resistor R1 is connected with the control end of the first MOS transistor M1, and the second end of the first resistor R1 is used for being connected with a first power supply VCC 1.
In this embodiment, a stronger driving capability, that is, a capability of driving a plurality of loads, can be realized by the driving circuit built up by the first MOS transistor. Meanwhile, in order to enable the first MOS transistor M1 to work normally, a loop in which a resistor is connected in series with a first resistor R1 may be provided between the gate and the source of the first MOS transistor M1 to provide a bias voltage for the first MOS transistor M1.
Fig. 3 shows a schematic circuit diagram of an optional driving circuit provided in an optional embodiment of the present application, in which the stress absorbing circuit 20 includes a first transistor Q1, a second transistor Q2, a second MOS transistor M2, and a first capacitor C1.
The first end of the first triode Q1 is used for being connected with a second power supply VCC2, the control end of the first triode Q1 is connected with the control end of the second triode Q2 and used as the first end of the stress absorption circuit 20 to obtain a driving signal, and the second end of the first triode Q1 is connected with the second end of the second triode Q2 and the control end of the second MOS tube M2; a first end of the second triode Q2 is used as a third end of the stress absorption circuit 20; the second end of the second MOS tube M2 is connected with the first end of the first capacitor C1, and the first end of the second MOS tube M2 is grounded; a second end of the first capacitor C1 is connected to the energy storage unit 102, the bleeder unit 103 and the first switch unit 101 as a second end of the stress absorbing circuit 20.
In this embodiment, when the driving signal (pulse width modulation signal) is at a high level, the first MOS transistor M1 is turned on, and in order to prevent the first MOS transistor M1 from being turned on, the first power VCC1 instantaneously generates a peak voltage that may damage the bleeder unit 103, and the first transistor Q1 and the second transistor Q2 are controlled by the driving signal, that is, the first transistor Q1 is turned on, the second transistor Q2 is turned off, and the second MOS transistor M2 is further turned on, so as to charge the first capacitor C1 to absorb the peak voltage.
Optionally, the triode or the MOS transistor provided in this embodiment may be an N-type MOS transistor or a P-type MOS transistor.
Fig. 4 is a schematic circuit diagram of a driving circuit according to an alternative embodiment of the present application, where fig. 4 is a circuit diagram of a stress absorbing circuit 20 provided in fig. 3, in which a first current limiting resistor R2 and a second current limiting resistor R3 are added.
A first end of the first current limiting resistor R2 is connected to a first end of the stress absorbing circuit 20, and a second end of the first current limiting resistor R2 is used for receiving a driving signal; and the second current-limiting resistor R3 are respectively connected with the second end of the first triode Q1 and the control end of the second MOS tube M2.
In this embodiment, the current-limiting resistor is added to prevent the transistor from being damaged due to overcurrent, and further, the current-limiting resistor is provided to ensure that the driving circuit can operate normally.
Fig. 5 is a schematic circuit diagram of an optional driving circuit provided in this embodiment of the present application, and the energy storage unit 102 may be an inductor L1 and a second capacitor C2.
In the embodiment of the present application, a first end of the inductor L1, which is used as a first end of the energy storage unit 102, is connected to the first switching unit 101, the bleeder unit 103, and the stress absorption circuit 20, and a second end of the inductor L1, which is used as a second end of the energy storage unit 102, is connected to a load.
In this embodiment, a first end of the second capacitor C2 is connected to a second end of the inductor L1, a second end of the second capacitor C2 is used for grounding, and the second capacitor C2 is used for performing energy storage filtering on the driving voltage.
In this embodiment, the first end of the second capacitor C2 is connected to the second end of the inductor L1 and the load, the second end of the second capacitor C2 is used for grounding GND, and by setting the second capacitor C2, the inductor L1 and the discharge unit 103 form a follow current loop, which prevents the inductance L1 from increasing the self-inductance potential, which causes the switch tube to be damaged, thereby ensuring the normal operation of the circuit, suppressing the harmonic signal generated in the circuit, further reducing the influence of the output voltage on the load, and ensuring the normal operation of the load.
With reference to fig. 5, in the present embodiment, the bleeder unit 103 may be a diode D1, a cathode of the diode D1 is used as a first end of the bleeder unit 103, a cathode of the diode D1 is connected to the first end of the inductor L1, an anode of the diode D1 is used as a second end of the bleeder unit 103, and an anode of the diode D1 is connected to the second end of the second capacitor C2. Specifically, in this embodiment, the anode of the diode D1 is connected to the second end of the second capacitor C2 to form a freewheeling circuit in combination with the inductor L1, so that the high emf generated by the inductor L1 is consumed in the freewheeling circuit in a continuous current manner, thereby protecting components in the circuit from being damaged.
In this embodiment, the buck circuit is obtained by setting the combination of the energy storage unit 102 and the bleeding unit 103, and in the embodiment of the present application, the buck circuit is used to control the rear-stage load, so as to ensure that the rear-stage load normally works.
As shown in fig. 6, the optional driving circuit provided in this embodiment is a circuit schematic diagram of the driving circuit provided in this optional embodiment, and the driving circuit may further include: and a signal amplification circuit 30.
The signal amplifying circuit 30 includes a third triode Q3, a third current limiting resistor R4, a third capacitor C3, and a second resistor R5. In this embodiment, a base of the third triode Q3 is used for receiving the driving signal, an emitter of the third triode Q3 is used for grounding, a collector of the third triode Q3 is connected to the control terminal of the first switching unit 101, a first end of the third current limiting resistor R4 is used for receiving the driving signal, a second end of the third current limiting resistor R4 is connected to a first end of the third capacitor C3, a first end of the second resistor R5, and a control terminal of the third triode Q3, and a second end of the third capacitor C3 and a second end of the second resistor R5 are connected to a second emitter of the third triode Q3.
In this embodiment, in order to ensure the normal operation of the driving circuit, a signal amplifying circuit 30 is added in front of the control end of the first switch unit 101 to amplify the driving signal, and at the same time, the signal amplifying circuit 30 utilizes the current conduction characteristic of the triode to turn on the signal amplifying circuit 30, so that the amplified driving signal is transmitted to the first switch unit 101, and when the control end of the first switch unit 101 receives the amplified driving signal, the first switch unit 101 is turned on, and the voltage converting circuit 10 operates and correspondingly controls the corresponding load to operate.
Fig. 7 shows a schematic circuit diagram of an optional driving circuit provided in this embodiment of the present application, and in this embodiment, with reference to the above embodiment and fig. 1 to 6, a signal amplifying circuit 30 is further disposed on the basis of the voltage converting circuit 10 and the stress absorbing circuit 20. In the present embodiment, the fan is driven by a driving circuit (the fan is not shown in fig. 7, but those skilled in the art will understand that the signal output by the OUT will be used to control the fan).
Specifically, the driving signal for driving the fan to rotate is a pulse width modulation signal output by the control circuit, and the high level of the pulse width modulation signal is 3.3V, and the low level of the pulse width modulation signal is 0V. In the present example, the first power supply VCC1 and the second power supply VCC2 are both auxiliary power supply sources.
When the control circuit (fig. 7 does not show the control circuit) outputs a pulse width modulation signal, and the pulse width modulation signal is at a high level, the pulse width modulation signal reaches the base of the third triode Q3 after being limited by the third current limiting resistor R4, filtered by the third capacitor C3 and divided by the fifth resistor R5, the third triode Q3 is turned on, the first MOS transistor M1 is turned on immediately, and the second capacitor C2 is charged when the power supply voltage stores energy in the inductor L1 through the first MOS transistor M1.
When the pulse width modulation signal is at a low level, the pulse width modulation signal turns off the third triode Q3, so that the first MOS transistor M1 is turned off, and the electric energy on the inductor L1 supplies power to the fan.
The positive electrode and the negative electrode of the third capacitor C3 are respectively connected with the positive electrode and the negative electrode of the fan, and the regulation of the voltage output to the fan can be realized by regulating the duty ratio of the pulse width modulation signal.
When the control circuit stops outputting the pulse width modulation signal, the third triode Q3 is cut off at this time, so that the first MOS transistor M1 is cut off, the inductor L1 stops storing energy, and the second capacitor C2 is charged. At this time, the electric energy on the inductor L1 and the second capacitor C2 can supply power to the fan, and the fan stops rotating after the fan is maintained to rotate for a certain time.
The third current limiting resistor R4 is a current limiting resistor, the second resistor R5 divides the voltage to provide the on-state voltage of the third transistor Q3, and the first resistor is a gate capacitor bleeder resistor of the first MOS transistor M1. The diode D1 is used for forming a freewheeling loop required by the energy storage unit 102 after the first MOS transistor M1 is turned off.
The third capacitor C3 is used for filtering the input driving signal, and the second capacitor C2 may be used as an energy storage element.
In this embodiment, the buck power supply circuit including the inductor, the capacitor, and the MOS transistor can adjust the voltage across the second capacitor C2 by adjusting the duty ratio of the driving signal, that is, the driving voltage output to the fan is realized, and the speed of the fan is further adjusted.
The heat dissipation device provided in the embodiment of the present application is, as shown in fig. 8, a schematic structural diagram of the heat dissipation device provided in the present application, and the heat dissipation device includes:
the fan and the drive circuit provided by the above embodiment.
In this embodiment, a fan acts as a load for the driving circuit. For a structural description of the driving circuit in this embodiment, please refer to the description of the driving circuit in the above embodiment, which is not repeated herein.
As shown in fig. 9, the device provided in the embodiment of the present application is a schematic structural diagram of the device provided in the present application, and the device includes: the embodiment provides a heat dissipation device and a control circuit.
In this embodiment, the control circuit is configured to output a driving signal to the driving circuit of the heat dissipation device. For a description of the structure of the heat dissipation device in this embodiment, please refer to the description of the structure of the heat dissipation device in the above embodiment, which is not repeated herein.
The device provided by the embodiment of the present application may further include a sampling circuit, in addition to the voltage conversion circuit 10, the stress absorption circuit 20, and the signal amplification circuit 30 provided by the above embodiment, where the sampling circuit may sample the temperature inside the device, and turn off the device when it is determined that the temperature inside the device exceeds the upper limit of the temperature, and turn on the heat dissipation device when the temperature is higher than the preset temperature.
Optionally, the sampling circuit may include a temperature sensor or a thermistor or other collection element.
The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (10)
1. A drive circuit is characterized by comprising a voltage conversion circuit and a stress absorption circuit;
the voltage conversion circuit comprises a first switch unit, an energy storage unit and a discharge unit; the control end of the first switch unit is used for receiving a driving signal, the first end of the first switch unit is used for being connected with a first power supply, and the second end of the first switch unit is connected with the first end of the energy storage unit; the second end of the energy storage unit is used as the output end of the driving circuit to output driving voltage; the driving voltage is used for driving a corresponding load; the first end of the bleeder unit is connected with the first end of the energy storage unit, and the second end of the bleeder unit and the third end of the energy storage unit are grounded;
a first end of the stress absorption circuit is used for receiving the driving signal, a second end of the stress absorption circuit is connected with a first end of the discharge unit, and a third end of the stress absorption circuit is used for grounding; the stress absorption circuit is used for absorbing spike voltage generated by the conduction of the first switch unit when the driving signal is received.
2. The driving circuit according to claim 1, wherein the first switching unit comprises a first resistor and a first MOS transistor, wherein,
the first end of the first resistor is connected with the control end of the first MOS transistor, and the second end of the first resistor is used for being connected with the first power supply;
the first end of the first MOS tube is used as the first end of the first switch unit, and the second end of the first MOS tube is used as the second end of the first switch unit.
3. The driving circuit according to claim 1, wherein the stress absorbing circuit comprises a first transistor, a second MOS transistor, and a first capacitor;
the first end of the first triode is used for being connected with a second power supply, the control end of the first triode is connected with the control end of the second triode and serves as the first end of the stress absorption circuit, and the second end of the first triode is connected with the second end of the second triode and the control end of the second MOS tube;
the first end of the second triode is used as the third end of the stress absorption circuit;
the second end of the second MOS tube is connected with the first end of the first capacitor, and the first end of the second MOS tube is grounded;
and the second end of the first capacitor is used as the second end of the stress absorption circuit.
4. The driving circuit of claim 3, wherein the stress absorbing circuit further comprises:
a first end of the first current limiting resistor is connected with a first end of the stress absorption circuit, and a second end of the first current limiting resistor is used for receiving the driving signal;
and the second current-limiting resistor is respectively connected with the second end of the first triode and the control end of the second MOS tube.
5. The drive circuit of claim 1, wherein the energy storage unit comprises an inductor, wherein,
the first end of the inductor is used as the first end of the energy storage unit, and the second end of the inductor is used as the second end of the energy storage unit.
6. The driving circuit according to claim 5, wherein the energy storage unit further comprises a second capacitor;
the first end of the second capacitor is connected with the second end of the inductor, the second end of the second capacitor is used as the third end of the energy storage unit, and the second capacitor is used for storing and filtering the driving voltage.
7. The driving circuit according to claim 6, wherein the bleeder unit comprises a diode, a cathode of the diode is used as the first terminal of the bleeder unit, a cathode of the diode is connected with the first terminal of the inductor, an anode of the diode is used as the second terminal of the bleeder unit, and an anode of the diode is connected with the second terminal of the second capacitor.
8. The driving circuit of claim 1, further comprising a signal amplification circuit; the signal amplifying circuit comprises a third triode, a third current limiting resistor, a third capacitor and a second resistor, wherein,
a base electrode of the third triode is used for receiving the driving signal, an emitting electrode of the third triode is used for being grounded, and a collector electrode of the third triode is connected with a control end of the first switch unit;
the first end of the third current-limiting resistor is used for receiving the driving signal, and the second end of the third current-limiting resistor is connected with the first end of the third capacitor, the first end of the second resistor and the control end of the third triode;
and the second end of the third capacitor and the second end of the second resistor are connected with the emitter of the third triode.
9. A heat dissipating device, comprising:
a fan; and
a drive circuit according to any one of claims 1 to 8; the fan is used as a load of the driving circuit.
10. An apparatus, comprising:
the heat sink of claim 9; and
and the control circuit is used for outputting a driving signal to the driving circuit of the heat dissipation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221979298.1U CN218335325U (en) | 2022-07-26 | 2022-07-26 | Drive circuit, heat abstractor and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221979298.1U CN218335325U (en) | 2022-07-26 | 2022-07-26 | Drive circuit, heat abstractor and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218335325U true CN218335325U (en) | 2023-01-17 |
Family
ID=84872325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221979298.1U Active CN218335325U (en) | 2022-07-26 | 2022-07-26 | Drive circuit, heat abstractor and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218335325U (en) |
-
2022
- 2022-07-26 CN CN202221979298.1U patent/CN218335325U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20150042298A1 (en) | Buck switching regulator | |
| TWI326520B (en) | Switching power supply circuit | |
| US11223271B2 (en) | Gate drive adapter | |
| US9590503B2 (en) | Switching converter and associated discharge method | |
| CN109828242B (en) | Transmitter control protection system | |
| CN218335325U (en) | Drive circuit, heat abstractor and equipment | |
| US10034335B1 (en) | Switching mode constant current LED driver | |
| CN201750125U (en) | Short circuit self-locking protection circuit | |
| CN217693775U (en) | Current-limiting constant current circuit composed of discrete devices | |
| CN219164218U (en) | Protection circuit of auxiliary power supply, auxiliary power supply and photovoltaic inverter system | |
| CN215734028U (en) | DCDC converter prevents flowing backward protection circuit | |
| CN114400897B (en) | Self-excitation type Buck converter | |
| JP4192650B2 (en) | Power switching element drive circuit | |
| US20210226533A1 (en) | Converter, step-down method based on the converter and electronic device | |
| US4594541A (en) | Switching regulator using dual slope sawtooth generator | |
| CN113162424B (en) | Piezoelectric ceramic actuator driving method and driving circuit | |
| CN112018729B (en) | Protective circuit | |
| CN211579897U (en) | Drive circuit and pump device using same | |
| CN210183605U (en) | Infrared LED drive circuit | |
| CN210469110U (en) | Discrete high-side driving circuit system | |
| CN110707916A (en) | Soft start circuit for switching power supply | |
| CN211126439U (en) | High-power semiconductor laser drive protection circuit | |
| CN117856587B (en) | SiC MOSFET driving circuit, control chip and switching power supply | |
| CN110601512A (en) | Discrete high-side driving circuit system | |
| CN112422115B (en) | Driving circuit for realizing negative-pressure turn-off based on MOSFET and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000, 1st Floor, Building E, Jiehe Industrial City, Shuitian Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Address before: 518000 workshop A202, Founder science and Technology Industrial Park, north of Songbai highway, Longteng community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhenghao Innovation Technology Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 Factory Building 401, Runheng Industrial Plant 1, Fuyuan Road, Zhancheng Community, Fuhai Street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region after: China Address before: 518000, 1st Floor, Building E, Jiehe Industrial City, Shuitian Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region before: China |