CN218730661U - Coil driving device and electronic apparatus having the same - Google Patents
Coil driving device and electronic apparatus having the same Download PDFInfo
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- CN218730661U CN218730661U CN202222916696.5U CN202222916696U CN218730661U CN 218730661 U CN218730661 U CN 218730661U CN 202222916696 U CN202222916696 U CN 202222916696U CN 218730661 U CN218730661 U CN 218730661U
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Abstract
The utility model provides a coil driving device, include: the control module is connected with a processor and used for storing high level through the control module when receiving a driving signal output by the processor and the driving signal is in a high level state so as to block the high level; the follow current module is connected with the control module and used for discharging the high level stored by the control module when the driving signal jumps to the low level state; and the rectifying module is connected with the follow current module and used for blocking reverse current generated between the rectifying module and the control module when the driving signal jumps to a low level state. The utility model also provides an electronic equipment, including aforementioned coil drive arrangement and the treater and the coil of being connected with coil drive arrangement. According to the above technical scheme of the utility model, can guarantee low frequency drive signal's output reliability when solving the not strong problem of anti ESD ability.
Description
Technical Field
The utility model relates to the technical field of electrical apparatus, especially a coil drive arrangement and have this coil drive arrangement's electronic equipment.
Background
In the coil driving circuit, when a load coil is driven through an output port of an MCU (microprogrammed control Unit), a conventional push-pull circuit is easy to have misoperation and weak in ESD (electro-static discharge) resistance, and if a PWM (pulse width modulation) control driving circuit is added at the front end of the push-pull circuit, the problem of unstable driving level still exists. For example, as shown in fig. 1, in the prior art, the scheme adopts a PWM control mode to drive the circuit output as shown in fig. 1, so as to increase the ESD resistance. The PWM control drive circuit can prevent malfunction due to external disturbance or power-on initialization by using the ac-dc resistance characteristic of the capacitor C1. However, when the low-frequency signal is used for driving, the driving signal may generate a sawtooth wave, and the driving level of the driving signal is unstable when the high-frequency signal is used for driving.
Therefore, how to provide a coil driving device and an electronic apparatus having the same to solve the problem of unstable driving level in the prior art has become a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a coil drive arrangement and have this coil drive arrangement's electronic equipment, it can be when solving the not strong problem of anti ESD ability, has guaranteed low frequency drive signal's output reliability, has increased drive signal's applicable frequency range.
An aspect of the present invention provides a coil driving device, including: the control module is connected with a processor and used for storing energy to block a high level when receiving a driving signal output by the processor and the driving signal is in the high level state; the follow current module is connected with the control module and used for discharging the electric energy stored by the control module when the driving signal jumps to a low level state; and the rectifying module is connected with the follow current module and used for blocking reverse current generated between the rectifying module and the control module when the driving signal jumps to a low level state.
In a further exemplary embodiment of the coil drive device according to the present invention, the first end of the control module is connected to a first end of a processor; the first end of the follow current module is connected with the second end of the control module; and the first end of the rectification module is connected with the second end of the follow current module.
In another exemplary embodiment of the coil driving device of the present invention, the control module includes a first capacitor and a second capacitor connected in parallel with the first capacitor; the first ends of the first capacitor and the second capacitor are connected with the first end of the processor. The control module can counteract the randomness of the control signal level during initialization and realize electrostatic discharge interference.
In a further exemplary embodiment of the coil drive device, the freewheel module comprises a freewheel diode; the first end of the freewheeling diode is connected with the second ends of the first capacitor and the second capacitor; the second end of the freewheeling diode is grounded; the first end of the freewheeling diode is the cathode, and the second end of the freewheeling diode is the anode. The follow current module can ensure the output reliability of the low-frequency driving signal and increase the applicable frequency range of the driving signal.
In yet another exemplary embodiment of the coil drive device according to the present invention, the rectifier module includes a rectifier diode; the first end of the rectifying diode is connected with the second ends of the first capacitor and the second capacitor; the first end of the rectifier diode is an anode; the second end of the rectifying diode is a cathode. The rectification module can cut off the reverse discharge loop to ensure the continuous and stable output signal.
In another exemplary embodiment of the present invention, the coil driving device further includes: the first end of the voltage stabilizing module is connected with the second end of the rectifying module; and the first end of the bleeding module is connected with the second end of the voltage stabilizing module. The voltage stabilizing module can stabilize the voltage of the driving signal. The bleed-off module may rapidly bleed off voltage.
In another exemplary embodiment of the coil driving apparatus of the present invention, the voltage stabilizing module includes a third capacitor and a fourth capacitor connected in parallel with the third capacitor; first ends of the third capacitor and the fourth capacitor are connected with a second end of the rectifier diode, and the second end of the rectifier diode is a cathode of the rectifier diode; the bleeder module comprises a second resistor, a third resistor and a fifth capacitor; the first end of the second resistor is connected with the first end of the third resistor, the second end of the third resistor is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is connected with the second end of the second resistor, and the first end of the second resistor is also connected with the second ends of the third capacitor and the fourth capacitor.
In still another exemplary embodiment of the coil driving device of the present invention, the coil driving device further includes: a push-pull module, a first end of which is connected with a second end of the bleed-off module; and the first end of the switch module is connected with the second end of the push-pull module, and the second end of the switch module is connected with a coil. The push-pull module can increase the driving capability and fast turn-off of the switch module. The switch module can realize the on and off of the coil.
In another exemplary embodiment of the coil driving apparatus of the present invention, the push-pull module includes an N-type transistor, a fourth resistor, a fifth resistor, and a sixth resistor; the N-type triode is in push-pull connection with the P-type triode, and the bases of the N-type triode and the P-type triode are both connected with the second end of the second resistor; the collector of the N-type triode is connected with the first end of the fourth resistor, the second end of the fourth resistor is connected with a power supply, the collector of the P-type triode is connected with the first end of the fifth resistor, the second end of the fifth resistor is grounded, and the emitting electrodes of the N-type triode and the P-type triode are both connected with the first end of the sixth resistor; the base electrodes of the N-type triode and the P-type triode are first ends of the push-pull module; the switch module comprises an NMOS tube, wherein the grid electrode of the NMOS tube is connected with the second end of the sixth resistor, the source electrode of the NMOS tube is connected with the coil, and the drain electrode of the NMOS tube is connected with another power supply.
In still another exemplary embodiment of the coil driving device of the present invention, the coil driving device further includes: and the first end of the current limiting module is connected with the first end of the processor, and the second end of the current limiting module is connected with the first end of the control module. The current limiting module can realize the current limiting of the driving signal.
Meanwhile, the utility model also provides an electronic equipment, this electronic equipment can guarantee low frequency drive signal's output reliability when solving the not strong problem of anti ESD ability, has increased drive signal's applicable frequency range.
The utility model discloses an electronic equipment, include: the coil driving device, and the processor and the coil connected with the coil driving device are as described above.
Drawings
The following drawings are merely illustrative and explanatory of the present invention and do not limit the scope of the present invention.
Fig. 1 is a circuit diagram of the prior art.
Fig. 2 is a schematic structural diagram of an implementation principle of the coil driving device of the present invention.
Fig. 3 is a schematic structural diagram of another implementation principle of the coil driving device of the present invention.
Fig. 4 is a schematic diagram of an implementation circuit of the coil driving device of the present invention.
Fig. 5 is a waveform diagram respectively showing that the P1, P2 and P3 ends respectively output when the output frequency of the driving signal is 200Hz, and the P1, P2 and P3 ends respectively output when the output frequency of the driving signal is 2 KHz.
Wherein the reference numbers are as follows:
current limiting module 10 control module 11 of coil driving device 1
First end of control Module 11A second end of control Module 11B first end of freewheel Module 12A
Second end of freewheel module 12A first end of rectifier module 13A second end of rectifier module 13B
First end of the voltage regulator module 14A bleed module 15A
Second end of bleed module 15A first end of push-pull module 16A second end of push-pull module 16A
First end of switch module 17A second end of switch module 17B first end of current limiting module 10A
Detailed Description
In order to clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings, wherein the same reference numerals in the drawings denote the same components or components with similar structures but the same functions.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, for simplicity and clarity of understanding, only one of the components having the same structure or function is schematically illustrated or labeled in some of the drawings.
In this document, "one" means not only "only one" but also a case of "more than one". In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate their degree of importance, order, and the like.
The present embodiment provides a coil driving device 1, and the coil driving device 1 is connected to a processor 2, and is used for driving a load coil by a driving signal output by the processor 2. Referring to fig. 2, an implementation principle structure of the coil driving device is schematically illustrated. As shown in fig. 2, the coil driving device 1 has an input terminal connected to the processor 21 and an output terminal connected to the coil 22.
As shown in fig. 2, the coil drive device 1 includes: the control module 11, the flywheel module 12, the rectifier module 13, the voltage regulator module 14, the bleeder module 15, the push-pull module 16 and the switch module 17.
In order to counteract the randomness of the control signal level during initialization and to achieve electrostatic discharge interference, as shown in fig. 2, a first terminal 21A of the processor 21 is connected to a first terminal 11A of a control module 11. In this embodiment, the control module 11 is configured to store energy through the control module 11 to block a high level when the driving signal is in the high level state, which is received from the driving signal output by the processor 21. In practical applications, the driving signal is a PWM signal.
In order to ensure the output reliability of the low-frequency driving signal, the applicable frequency range of the driving signal is increased. The present embodiment employs the freewheel module 12 to discharge the electric energy stored in the control module 11 when the driving signal jumps to the low level state. Wherein the first end 12A of the freewheel module 12 is connected to the second end 11B (shown as end P1 in fig. 2) of the control module 11, the freewheel module 12 can avoid the negative voltage occurring at P1 caused thereby.
In order to cut off the reverse discharge loop and ensure the output signal to be stable continuously, the coil driving device 1 of the present embodiment is configured with a rectifying module 13. The first end 13A of the rectifier module 13 is connected to the second end 12B of the freewheel module 12. The rectifier module 13 is configured to block a reverse current generated between a second end 13B (shown as a P2 end in fig. 2) of the rectifier module 13 and the second end 11B of the control module when the driving signal jumps to a low level state.
In order to stabilize the voltage of the driving signal, the coil driving device 1 of the present embodiment is further configured with a voltage stabilizing module 14. The first end 14A of the regulator module 14 is connected to the second end 13B of the rectifier module 13.
In order to quickly bleed off the voltage at the input of the push-pull module 16, the coil drive apparatus 1 of the present embodiment is provided with a bleed-off module 15. The first end 15A of the bleed module 15 is connected with the second end 14B of the regulator module 14.
In order to increase the driving capability and fast turn-off of the switch module, the coil driving device 1 of the present embodiment further includes a push-pull module 16. Wherein the first end 16A of the push-pull module 16 is connected with the second end 15B (shown as P3 end in fig. 2) of the bleeder module 15.
In order to turn on and off the coil, the coil driving device 1 of the present embodiment is further configured with a switch module 17. The first end 17A of the switch module 17 is connected to the second end 16B of the push-pull module 16, and the second end 17B of the switch module 17 is connected to the coil 22.
Fig. 3 is a schematic structural diagram of another embodiment of the coil driving device. The coil driving device 1 may further include a current limiting module 10, wherein a first end 10A of the current limiting module 10 is connected to a first end 21A of the processor 21, and a second end 10B of the current limiting module 10 is connected to a first end 11A of the control module 11. The current limiting module 10 may implement a current limiting function for the driving signal. In practical applications, the current limiting module 10 may be implemented by using a current limiting resistor.
In order to achieve the technical effects of economical efficiency and low cost, the coil driving device provided by the embodiment preferably adopts the circuit structure shown in fig. 4.
As shown in fig. 4, the control module 11 includes a first capacitor C1 and a second capacitor C2 connected in parallel with the first capacitor C1. The freewheel module 12 includes a freewheel diode D1. The rectifying module 13 includes a rectifying diode D2. The voltage stabilizing module 14 includes a third capacitor C3 and a fourth capacitor C4 connected in parallel with the third capacitor C3. The bleeder module 15 comprises a second resistor R2, a third resistor R3 and a fifth capacitor C5. The push-pull module 16 includes an N-type transistor Q1, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. The switch module 17 includes an NMOS transistor Q3.
The following electronic components are connected as follows:
the first capacitor C1 and the second capacitor C2 are connected in parallel with the first capacitor C1, and input ends of the first capacitor C1 and the second capacitor C2 are connected with the first end 21A of the processor 21. A first terminal of the freewheeling diode (D1) is connected to second terminals (the terminal P1 shown in fig. 2) of the first capacitor C1 and the second capacitor C2. The second terminal of the freewheel diode D1 is grounded. The first end of the freewheeling diode D1 is a cathode, and the second end of the freewheeling diode D1 is an anode. A first terminal of the rectifying diode D2 is connected to second terminals of the first capacitor C1 and the second capacitor C2. The first end of the rectifier diode D2 is an anode, and the second end of the rectifier diode D2 is a cathode. First terminals of the third capacitor C3 and the fourth capacitor C4 are connected to a second terminal (terminal P2 shown in fig. 2) of the rectifying diode D2. A first end of the second resistor R2 is connected to a first end of the third resistor R3, a second end of the third resistor R3 is connected to a first end of the fifth capacitor C5, a second end (shown as a P3 end in fig. 2) of the fifth capacitor C5 is connected to a second end of the second resistor R2, and a first end of the second resistor R2 is also connected to second ends of the third capacitor C3 and the fourth capacitor C4. The N-type triode Q1 is connected with the P-type triode Q2 in a push-pull mode, bases of the N-type triode Q1 and the P-type triode Q2 are connected with a second end of a second resistor R2, a collector of the N-type triode Q1 is connected with a first end of a fourth resistor R4, a second end of the fourth resistor R4 is connected with a power supply VCC1, a collector of the P-type triode Q2 is connected with a first end of a fifth resistor R5, a second end of the fifth resistor R5 is grounded, emitting electrodes of the N-type triode Q1 and the P-type triode Q2 are connected with a first end of a sixth resistor R6, a grid electrode of an NMOS pipe Q3 is connected with a second end of the sixth resistor, a source electrode of the NMOS pipe Q3 is connected with a coil, and a drain electrode of the NMOS pipe Q3 is connected with another power supply VCC 2. Please refer to fig. 5, which respectively shows the waveform diagrams outputted from the P1, P2 and P3 terminals when the output frequency of the driving signal is 200Hz, and the waveform diagrams outputted from the P1, P2 and P3 terminals when the output frequency of the driving signal is 2 KHz. It can be seen from fig. 5 that the coil driving device provided by the present embodiment can be reliably used at high and low frequencies, and there is no sawtooth wave or driving signal reduction phenomenon.
When the driving signal is in a high level state, the first capacitor C1 and the second capacitor C2 store electric energy. When the driving signal jumps to a low level state, the freewheeling diode D1 discharges the voltage stored in the first capacitor C1 and the second capacitor C2, and prevents the second ends of the first capacitor C1 and the second capacitor C2 from generating a negative voltage. And the rectifying diode D2 blocks a reverse current generated between the cathode of the rectifying diode D2 and the second terminal of the capacitor C1/C2 when the driving signal jumps to a low level state.
When the coil 22 is in a working state, the fifth capacitor C5 is in a charging state, the input end of the push-pull module 16 is at a high level, the N-type triode Q1 is turned on, the NMOS transistor Q3 is turned on, and the coil works. When the coil 22 needs to be turned off and the driving signal is at a low level, the second resistor R2, the third resistor R3 and the fifth capacitor C5 form a discharging loop, the electric energy stored in the fifth capacitor C5 is quickly discharged, so that the input end of the push-pull module 16 is at a low level, the P-type triode Q2 is turned on, the NMOS transistor Q3 is turned off, and the coil is turned off.
The present embodiment also provides an electronic device, which includes the coil driving device 1, and the processor 21 and the coil 22 connected to the coil driving device 1.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above list of details is only for the practical examples of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of the features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.
Claims (11)
1. A coil driving device, comprising:
the control module (11) is connected with a processor (21) and used for receiving a driving signal output by the processor (21), and when the driving signal is in a high level state, energy is stored through the control module (11) to block the high level;
the follow current module (12) is connected with the control module (11) and used for discharging the electric energy stored in the control module (11) when the driving signal jumps to a low level state; and
and the rectifying module (13) is connected with the follow current module and is used for blocking reverse current generated between the rectifying module (13) and the control module (11) when the driving signal jumps to a low level state.
2. The coil driving device according to claim 1, wherein:
the first end (11A) of the control module (11) is connected with the first end (21A) of a processor (21);
a first end (12A) of the freewheeling module (12) is connected with a second end (11B) of the control module (11);
a first end (13A) of the rectifier module (13) is connected with a second end (12B) of the freewheel module (12).
3. The coil drive device according to claim 2, characterized in that:
the control module (11) comprises a first capacitor (C1) and a second capacitor (C2) connected with the first capacitor (C1) in parallel; first ends of the first capacitor (C1) and the second capacitor (C2) are both connected with a first end (21A) of the processor (21).
4. The coil driving device according to claim 3, wherein:
the freewheel module (12) comprises a freewheel diode (D1); wherein a first end of the freewheeling diode (D1) is connected with second ends of the first capacitor (C1) and the second capacitor (C2); the second end of the freewheeling diode (D1) is grounded; the first end of the freewheeling diode (D1) is a cathode, and the second end of the freewheeling diode (D1) is an anode.
5. The coil driving device according to claim 4, wherein:
the rectifying module (13) comprises a rectifying diode (D2); wherein, the first end of the rectifier diode (D2) is connected with the second ends of the first capacitor (C1) and the second capacitor (C2); the first end of the rectifier diode (D2) is an anode; the second end of the rectifier diode (D2) is a cathode.
6. The coil driving device according to claim 5, wherein: further comprising:
a voltage regulation module (14) having a first end (14A) connected to a second end (13B) of the rectifier module (13);
a bleeding module (15) having a first end (15A) connected to a second end (14B) of the voltage regulation module (14).
7. The coil driving device according to claim 6, wherein:
the voltage stabilizing module (14) comprises a third capacitor (C3) and a fourth capacitor (C4) connected with the third capacitor (C3) in parallel; first ends of the third capacitor (C3) and the fourth capacitor (C4) are connected with a second end of the rectifier diode (D2), and the second end of the rectifier diode (D2) is a cathode of the rectifier diode;
the bleeder module (15) comprises a second resistor (R2), a third resistor (R3) and a fifth capacitor (C5); the first end of the second resistor (R2) is connected with the first end of the third resistor (R3), the second end of the third resistor (R3) is connected with the first end of the fifth capacitor (C5), the second end of the fifth capacitor (C5) is connected with the second end of the second resistor (R2), and the first end of the second resistor (R2) is also connected with the second ends of the third capacitor (C3) and the fourth capacitor (C4).
8. The coil driving device according to claim 7, wherein: further comprising:
a push-pull module (16) having a first end (16A) connected to the second end (15B) of the bleeder module (15);
and a switch module (17), wherein a first end (17A) of the switch module is connected with a second end (16B) of the push-pull module (16), and a second end (17B) of the switch module is connected with a coil.
9. The coil drive device according to claim 8, characterized in that:
the push-pull module (16) comprises an N-type triode (Q1), a fourth resistor (R4), a fifth resistor (R5) and a sixth resistor (R6); the N-type triode (Q1) is in push-pull connection with the P-type triode (Q2), and the bases of the N-type triode (Q1) and the P-type triode (Q2) are both connected with the second end of the second resistor (R2); the collector of the N-type triode (Q1) is connected with the first end of the fourth resistor (R4), the second end of the fourth resistor (R4) is connected with a power supply (VCC 1), the collector of the P-type triode (Q2) is connected with the first end of the fifth resistor (R5), the second end of the fifth resistor (R5) is grounded, and the emitting electrodes of the N-type triode (Q1) and the P-type triode (Q2) are both connected with the first end of the sixth resistor (R6); the base electrodes of the N-type triode (Q1) and the P-type triode (Q2) are the first end (16A) of the push-pull module (16);
switch module (17) include NMOS pipe (Q3), and wherein, the second end of the grid and sixth resistance (R6) of NMOS pipe (Q3) is connected, and the source electrode and the coil of NMOS pipe (Q3) are connected, and the drain electrode and another power (VCC 2) of NMOS pipe (Q3) are connected.
10. The coil driving device according to claim 1, wherein: further comprising:
a current limiting module (10) having a first end (10A) connected to a first end (21A) of the processor (21) and a second end (10B) connected to a first end (11A) of the control module (11).
11. An electronic device, comprising:
the coil drive device (1) as claimed in any of the preceding claims 1 to 10, and a processor (21) and a coil (22) connected to the coil drive device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222916696.5U CN218730661U (en) | 2022-10-31 | 2022-10-31 | Coil driving device and electronic apparatus having the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222916696.5U CN218730661U (en) | 2022-10-31 | 2022-10-31 | Coil driving device and electronic apparatus having the same |
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| Publication Number | Publication Date |
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| CN218730661U true CN218730661U (en) | 2023-03-24 |
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| CN202222916696.5U Active CN218730661U (en) | 2022-10-31 | 2022-10-31 | Coil driving device and electronic apparatus having the same |
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| CN (1) | CN218730661U (en) |
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