Driving circuit of lamp string and electronic equipment

Abstract

The utility model discloses a drive circuit of a lamp string and electronic equipment, which are used in the technical field of drive circuits. The driving circuit of the lamp string comprises a first booster circuit, a second booster circuit, a current sharing circuit, a step-down circuit and a processor, the processor is connected with the control end of the first booster circuit and the control end of the second booster circuit; the output end of the first booster circuit and the output end of the second booster circuit are connected with the positive electrode of the lamp string through the current sharing circuit. The processor is used for controlling the first booster circuit and the second booster circuit and outputting voltage to the lamp string through the current sharing circuit; the processor is connected with the control end of the step-down circuit; the output end of the step-down circuit is connected with the cathode of the lamp string; the processor is used for controlling the step-down circuit to reduce the voltage of the lamp string. And a plurality of DC-DC booster circuits are not needed to drive the lamp string, so that the electromagnetic compatibility interference and the cost of the driving circuit are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive circuit technical field especially, it relates to a lamp string's drive circuit and electronic equipment. BACKGROUND

[0002] The existing, take the lamp pearl as the light source and widely use in each aspect, the lamp pearl includes LED (light emitting diode) or laser lamp, LED is a kind of solid-state semiconductor device that can convert electric energy into visible light, can directly convert electricity into light;Laser lamp contains solid-state laser, uses krypton lamp and crystal rod to produce laser beam, forms visible light by frequency conversion. In the drive circuit of lamp pearl, DC-DC boost circuit is often used for boost driving.

[0003] And in the production process, multiple lamp pearls are often connected by series-parallel connection to form a lamp string, such as LED string or laser lamp string;The lamp string contains a large number of lamp pearls, at this time, multiple DC-DC boost circuits are needed in the drive circuit to drive the lamp string, the more the number of lamp pearls, the more DC-DC boost circuits are needed;And because DC-DC boost circuit has certain radiation, multiple DC-DC boost circuits are easy to cause electromagnetic compatibility (EMC) interference of drive circuit too large, and the cost is higher. SUMMARY

[0004] The utility model provides a lamp string's drive circuit and electronic equipment, effectively reduce the electromagnetic compatibility interference and cost of drive circuit.

[0005] The utility model provides a lamp string's drive circuit, the lamp string includes multiple lamp pearls, and it includes: first boost circuit, second boost circuit, current sharing circuit, voltage reduction circuit and processor;

[0006] The control end of first boost circuit and the control end of second boost circuit are connected with the processor, and the output end of first boost circuit and the output end of second boost circuit are connected with the positive pole of lamp string through current sharing circuit;The processor is used to control first boost circuit and second boost circuit, and output voltage of lamp string through current sharing circuit;

[0007] The control end of voltage reduction circuit is connected with the processor, and the output end of voltage reduction circuit is connected with the negative pole of lamp string;The processor is used to control voltage reduction circuit to reduce the voltage of lamp string.

[0008] Further, the circuit structure of first boost circuit and second boost circuit is same;First boost circuit includes: boost chip, inductance and schottky diode;

[0009] The processor is connected with the enable pin of the boost chip, the input pin of the boost chip is connected with the direct current power supply and one end of the inductor, the switch control pin of the boost chip is connected with the other end of the inductor and the anode of the Schottky diode, and the cathode of the Schottky diode is connected with the output end of the first boost circuit.

[0010] Further, the first boost circuit further comprises a first resistor and a second resistor.

[0011] One end of the first resistor is connected with the output end of the first boost circuit, the other end of the first resistor is connected with the feedback pin of the boost chip and one end of the second resistor, and the other end of the second resistor is grounded.

[0012] Further, the feedback pin of the boost chip in the first boost circuit is connected with the feedback pin of the boost chip in the second boost circuit.

[0013] Further, the first boost circuit further comprises a first filter capacitor and a second filter capacitor.

[0014] One end of the first filter capacitor and one end of the second filter capacitor are connected with the output end of the first boost circuit.

[0015] The other end of the first filter capacitor and the other end of the second filter capacitor are grounded.

[0016] Further, the current sharing circuit comprises a third resistor and a fourth resistor; wherein the resistance values of the third resistor and the fourth resistor are less than a preset resistance value.

[0017] One end of the third resistor is connected with the output end of the first boost circuit, and one end of the fourth resistor is connected with the output end of the second boost circuit.

[0018] The other end of the third resistor and the other end of the fourth resistor are connected with the positive electrode of the lamp string.

[0019] Further, the buck circuit comprises a buck chip.

[0020] The processor is connected with the dimming pin of the buck chip, and the power supply end of the buck chip is connected with the direct current power supply.

[0021] The drive pin of the buck chip and the clock enable pin of the buck chip are connected with the output end of the buck circuit.

[0022] Further, the buck circuit further comprises a fifth resistor and a sixth resistor.

[0023] One end of the fifth resistor and one end of the sixth resistor are connected with a current setting pin of the voltage reduction chip.

[0024] The other end of the fifth resistor and the other end of the sixth resistor are grounded.

[0025] Further, the driving circuit further comprises a direct current power supply.

[0026] The direct current power supply is connected with the first voltage increasing circuit, the second voltage increasing circuit, the voltage reduction circuit and the processor.

[0027] The utility model further provides an electronic equipment, the electronic equipment includes the driving circuit of above.

[0028] From above technical scheme can see, the utility model has following advantages:

[0029] In the utility model, the driving circuit of the lamp string comprises: a first voltage increasing circuit, a second voltage increasing circuit, a current sharing circuit, a voltage reduction circuit and a processor; the processor is connected with a control end of the first voltage increasing circuit and a control end of the second voltage increasing circuit; the output end of the first voltage increasing circuit and the output end of the second voltage increasing circuit are connected with the anode of the lamp string through the current sharing circuit; the processor is used to control the first voltage increasing circuit and the second voltage increasing circuit, and output voltage to the lamp string through the current sharing circuit; the processor is connected with a control end of the voltage reduction circuit, and the output end of the voltage reduction circuit is connected with the cathode of the lamp string; the processor is used to control the voltage reduction circuit to reduce the voltage of the lamp string. Only need to output voltage to the lamp string through the first voltage increasing circuit and the second voltage increasing circuit through the current sharing circuit, and the driving circuit does not need multiple DC-DC voltage increasing circuits to drive the lamp string, thereby effectively reducing the cost of the driving circuit; and the lamp string can be effectively driven by the voltage reduction circuit, and the electromagnetic compatibility interference of the driving circuit can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments recorded in the application, and other drawings can also be obtained according to these drawings for the ordinary skilled in the art.

[0031] Figure 1 It is a structural block diagram of the driving circuit disclosed by the utility model;

[0032] Figure 2 It is a composition circuit diagram of the lamp string disclosed by the utility model;

[0033] Figure 3 It is a circuit diagram of the driving circuit disclosed by the utility model. DETAILED DESCRIPTION

[0034] The technical scheme of the utility model will be described below in detail in connection with the drawings. The following examples are only used to make the technical scheme of the utility model clearer, and therefore only serve as examples, but cannot limit the protection scope of the utility model.

[0035] In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model in that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0036] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] The existing one, often connect multiple lamp beads through series and parallel connection to form a lamp string, such as LED string or laser lamp string; the lamp string contains a large number of lamp beads, at this time, multiple DC-DC boost circuits are needed in the driving circuit to drive the lamp string, the more the number of lamp beads, the more DC-DC boost circuits are needed; and since the DC-DC boost circuit has a certain radiation, the multiple DC-DC boost circuits are easy to cause the electromagnetic compatibility (EMC) of the driving circuit to be too large, and the cost is high. Therefore, the utility model provides a driving circuit of a lamp string, which can effectively reduce the electromagnetic compatibility and cost of the driving circuit; as shown in the figure, the specific steps are as follows: Figure 1

[0038] In the utility model, the driving circuit of the lamp string comprises: a first boost circuit 100, a second boost circuit 200, a current sharing circuit 300, a step-down circuit 400 and a processor 500. Wherein, the lamp string comprises a plurality of lamp beads, both ends of the lamp bead are positive and negative, the lamp bead can be lit by providing voltage to both ends of the lamp bead, the lamp bead can be LED lamp bead or laser lamp bead, and the specific place is not limited. The connection mode of the plurality of lamp beads in the lamp string can be: series connection, parallel connection, or series connection and then parallel connection, and the specific place is not limited. As shown in the figure, Figure 2 ​As shown, 21 lamp beads (D1, D2, …, D20, D21) are connected in series by the negative electrode 1 and the positive electrode 2 to obtain three lamp bead groups, and the three lamp bead groups are connected in parallel to obtain a corresponding lamp string; wherein VDD represents the positive electrode of the lamp string, and 660_N represents the negative electrode of the lamp string.

[0039] The processor 500 can be an MCU (micro control unit) or a CPU (central processing unit), and the specific processor is not limited herein. The processor 500 is connected with the control end of the first voltage boosting circuit 100 and the control end of the second voltage boosting circuit 200. It can be understood that the processor 500 can control the working state of the first voltage boosting circuit 100 and the second voltage boosting circuit 200 by sending corresponding enable signals to the first voltage boosting circuit 100 and the second voltage boosting circuit 200, that is, to control the first voltage boosting circuit 100 and the second voltage boosting circuit 200 to start running or stop running. The output end of the first voltage boosting circuit 100 and the output end of the second voltage boosting circuit 200 are connected with the positive electrode of the lamp string through the current sharing circuit 300. The processor 500 is used for controlling the first voltage boosting circuit 100 and the second voltage boosting circuit 200 to output voltage to the lamp string through the current sharing circuit 300; that is, the processor 500 controls the first voltage boosting circuit 100 and the second voltage boosting circuit 200 to start running to output voltage to the lamp string through the current sharing circuit 300.

[0040] It can be understood that the first voltage boosting circuit 100, the second voltage boosting circuit 200 and the current sharing circuit 300 can be understood as the positive electrode circuit of the lamp string. The first voltage boosting circuit and the second voltage boosting circuit are interconnected through the current sharing circuit, and output voltage to the positive electrode of the lamp string to supply power to the lamp string. The two voltage boosting circuits can provide a larger power supply (output voltage) to light the lamp string (that is, to light the lamp beads in the lamp string), and the current sharing circuit can share the current of the output of the first voltage boosting circuit and the second voltage boosting circuit. When the load of one of the first voltage boosting circuit and the second voltage boosting circuit is too large, the other voltage boosting circuit will replace the power supply to ensure that the voltage boosting circuit works normally without heating, effectively controlling the heating temperature of the voltage boosting circuit.

[0041] The processor 500 is connected with the control end of the step-down circuit 400, and the output end of the step-down circuit 400 is connected with the negative pole of the lamp string; the processor 500 is used for controlling the step-down circuit 400 to reduce the voltage of the lamp string. That is, after the lamp string is lighted, the processor 500 can control the step-down circuit 400 to reduce the voltage of the lamp string by controlling the working state (turning on or turning off) of the step-down circuit 400, so as to drive the lamp string in the step-down mode, adjust the power brightness of the lamp string, and effectively reduce the electromagnetic compatibility interference problem; the step-down circuit 400 can be understood as a power negative pole circuit of the lamp string. Specifically, the processor 500 can send a pulse width modulation signal (PWM signal) to the step-down circuit 400 to control the proportion of the on time and the off time of the step-down circuit 400. The smaller the on time is, the smaller the current output by the corresponding step-down circuit 400 to the lamp string is, and the larger the on time is, the larger the current output by the corresponding step-down circuit 400 to the lamp string is, so as to adjust the power brightness of the lamp string.

[0042] It can be seen that, in the utility model, the driving circuit of the lamp string comprises: a first boost circuit, a second boost circuit, a current sharing circuit, a step-down circuit and a processor; the processor is connected with the control end of the first boost circuit and the control end of the second boost circuit; the output end of the first boost circuit and the output end of the second boost circuit are connected with the positive pole of the lamp string through the current sharing circuit; the processor is used for controlling the first boost circuit and the second boost circuit to output voltage to the lamp string through the current sharing circuit; the processor is connected with the control end of the step-down circuit, and the output end of the step-down circuit is connected with the negative pole of the lamp string; the processor is used for controlling the step-down circuit to reduce the voltage of the lamp string. Only the first boost circuit and the second boost circuit are needed to output voltage to the lamp string with a large number of lamp beads through the current sharing circuit, the driving circuit does not need multiple DC-DC boost circuits to drive the lamp string, and the cost of the driving circuit is effectively reduced; the lamp string can be driven in the step-down mode through the step-down circuit, the electromagnetic compatibility interference of the driving circuit can be effectively reduced, that is, the electromagnetic compatibility is controlled in a low range, and only two boost circuits correspond to the electromagnetic compatibility.

[0043] Further, when the driving circuit needs to drive multiple different lamp strings, the positive poles of the multiple lamp strings can directly use the power positive pole circuit (boost current sharing driving circuit) in the driving circuit, only one step-down circuit needs to be added at the negative pole of the lamp string, so that the multiple different lamp strings can be driven, and different boost driving circuits do not need to be used for the positive poles of the multiple lamp strings, so that the cost is effectively reduced.

[0044] The driving circuit will be described in detail below, as shown in the following specific embodiments. Figure 3 Specifically, as shown in the following specific embodiments.

[0045] The utility model discloses, drive circuit still includes: direct current power V1, this direct current power can be dry battery, battery or direct current generator, and this place does not make limited specifically. The direct current power V1 (namely VBAT) is connected with first boost circuit 100, second boost circuit 200, voltage reducing circuit 300 and processor 500. The direct current power V1 is used to power supply to whole drive circuit, namely powers respectively first boost circuit 100, second boost circuit 200, voltage reducing circuit 300 and processor 500.

[0046] Among them, first boost circuit 100 includes: boost chip U101, inductance L1 and schottky diode DZ1, this boost chip U101 mainly is DC-DC boost chip, can be SX1308 boost chip or XL6009 boost chip, and this place does not make limited specifically, and boost chip U101 and the passive device of surrounding common constitute boost circuit. The enable pin EN of processor 500 is connected with boost chip U101, can be connected with the enable pin EN of boost chip U101 after grounding through resistance R7, reduces the interference, and processor 500 can control the work of boost chip U101 through PWR_EN enable signal, namely controls the working state of first boost circuit.

[0047] The input pin VIN of boost chip U101 is connected with direct current power VBAT and one end of inductance L1, wherein, direct current power VBAT can be connected with the input pin VIN of boost chip U101 after grounding through capacitor C5 and filtering. The switch control pin SW of boost chip U101 is connected with the other end of inductance L1 and the anode P of schottky diode DZ1, and the cathode N of schottky diode DZ1 is connected with the output end VOUT1 of first boost circuit. Boost chip U101 further includes: the suspended pin NC and the ground pin GND.

[0048] The circuit structure of first boost circuit 100 and second boost circuit 200 is same, including: boost chip U102, inductance L2 and schottky diode DZ2, and the output end VOUT2 of second boost circuit 200, and the specific connection mode does not repeat here. Corresponding direct current power VBAT is connected with the input pin VIN of boost chip U102 after grounding filtering through capacitor C6.

[0049] Further, the first voltage boosting circuit 100 further comprises a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to the output terminal VOUT1 of the first voltage boosting circuit 100, and the other end of the first resistor R1 is connected to the feedback pin FB of the voltage boosting chip U101 and one end of the second resistor R2, and the other end of the second resistor R2 is grounded. At this time, the output voltage of the first voltage boosting circuit 100 can be detected in the feedback pin FB of the voltage boosting chip U101, and the output voltage of the first voltage boosting circuit 100 is VOUT=VREF×(1+R1 / R2), wherein VREF is a reference voltage. The voltage boosting chip U101 can detect the output voltage of the first voltage boosting circuit 100 in real time. It can be understood that the output voltage of the first voltage boosting circuit 100 can be adjusted by adjusting the resistance values of the first resistor R1 and the second resistor R2.

[0050] Similarly, resistors can also be arranged in the second voltage boosting circuit 100, and the output voltage of the second voltage boosting circuit 100 can be detected in real time through the feedback pin FB of the voltage boosting chip U102.

[0051] Further, the feedback pin FB of the voltage boosting chip U101 in the first voltage boosting circuit 100 is connected to the feedback pin FB of the voltage boosting chip U102 in the second voltage boosting circuit 200. At this time, the voltage boosting chip U101 of the first voltage boosting circuit 100 and the voltage boosting chip U102 of the second voltage boosting circuit 200 can both detect the output voltage of the first voltage boosting circuit 100. In order to maintain the output voltage of the first voltage boosting circuit 100 plus the output voltage of the second voltage boosting circuit 200 at a certain starting voltage, the light string is lit using the starting voltage. It can be understood that if the output voltage of the first voltage boosting circuit 100 is too low, the voltage boosting chip U102 of the second voltage boosting circuit 200 can increase the output voltage of the second voltage boosting circuit 200; if the output voltage of the first voltage boosting circuit 100 is too high, the voltage boosting chip U102 of the second voltage boosting circuit 200 can decrease the output voltage of the second voltage boosting circuit 200; so that the output voltage of the first voltage boosting circuit 100 plus the output voltage of the second voltage boosting circuit 200 remains balanced and maintains at a certain starting voltage.

[0052] In an implementable manner, the output voltage of the second voltage boosting circuit 200 can also be detected, and the output voltage of the first voltage boosting circuit 100 and the output voltage of the second voltage boosting circuit 200 can be adjusted so that the output voltage of the first voltage boosting circuit 100 plus the output voltage of the second voltage boosting circuit 200 maintains at a certain starting voltage.

[0053] Further, the first voltage boosting circuit 100 further comprises a first filter capacitor C1 and a second filter capacitor C2; one end of the first filter capacitor C1 and one end of the second filter capacitor C2 are connected with the output end VOUT1 of the first voltage boosting circuit 100; the other end of the first filter capacitor C1 and the other end of the second filter capacitor C2 are grounded. That is, the first voltage boosting circuit 100 outputs to the lamp string after filtering out the noise by the first filter capacitor C1 and the second filter capacitor C2. Similarly, the second voltage boosting circuit 200 further comprises a third filter capacitor C3 and a fourth filter capacitor C4 to filter out the noise of the second voltage boosting circuit 200.

[0054] Further, the current equalization circuit 300 comprises a third resistor R3 and a fourth resistor R4; wherein the resistance values of the third resistor R3 and the fourth resistor R4 are less than a preset resistance value; wherein the preset resistance value can be 10 milliohms or 20 milliohms, which is not limited here; that is, the third resistor R3 and the fourth resistor R4 are micro resistors.

[0055] Wherein one end of the third resistor R3 is connected with the output end VOUT1 of the first voltage boosting circuit 100, and one end of the fourth resistor R4 is connected with the output end VOUT2 of the second voltage boosting circuit 200; the other end of the third resistor R3 and the other end of the fourth resistor R4 are connected with the positive electrode VDD of the lamp string. That is, the third resistor R3 and the fourth resistor R4 are used to equalize the current output by the first voltage boosting circuit 100 and the second voltage boosting circuit 200, and the design structure of the current equalization circuit 300 is relatively simple, which can effectively reduce the cost.

[0056] Further, the voltage reducing circuit 400 comprises a voltage reducing chip U100; the voltage reducing chip U100 can be OC7140 or TPS54331DDAR chip, which is not limited here. The processor 500 is connected with the dimming pin DIM of the voltage reducing chip U100, the power supply end VDD of the voltage reducing chip U100 is connected with the direct current power supply VBAT, wherein the direct current power supply VBAT is connected with the power supply end VDD of the voltage reducing chip U100 after being filtered by the capacitor C7 and grounded; the driving pin LED of the voltage reducing chip U100 and the clock enable pin FP of the voltage reducing chip U100 are connected with the output end of the voltage reducing circuit 400. The voltage reducing chip U100 further comprises suspended pins NC1 and NC2, and a ground pin GND. The processor 500 controls the on-off of the voltage reducing chip U100 by outputting a pulse width modulation signal (PWM signal) to realize the control of the power brightness of the lamp string.

[0057] Further, the voltage reduction circuit 400 further comprises a fifth resistor R5 and a sixth resistor R6; one end of the fifth resistor R5 and one end of the sixth resistor R6 are connected with the current setting pins CS1 and CS2 of the voltage reduction chip U100; the other end of the fifth resistor R5 and the other end of the sixth resistor R6 are grounded. The fifth resistor R5 and the sixth resistor R6 are used for limiting the maximum current of the lamp string, for example, when the fifth resistor R5 and the sixth resistor R6 are both 10 ohms, the maximum current of the corresponding lamp string is 20 mA.

[0058] The utility model further provides an electronic equipment, the electronic equipment includes the drive circuit of above.

[0059] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and are not limited thereto; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should be covered in the scope of the claims and the description of the utility model.

Claims

1. A driving circuit of a light string, the light string comprising a plurality of light beads, characterized in that, The application relates to a driving circuit for a lamp string. The driving circuit comprises a first voltage boosting circuit, a second voltage boosting circuit, a current sharing circuit, a voltage reducing circuit and a processor. The processor is connected with control ends of the first voltage boosting circuit and the second voltage boosting circuit, and the output ends of the first voltage boosting circuit and the second voltage boosting circuit are connected with the positive pole of the lamp string through the current sharing circuit. The processor is used for controlling the first voltage boosting circuit and the second voltage boosting circuit to output voltage to the lamp string through the current sharing circuit.

2. The drive circuit according to claim 1, characterized by The processor is connected with the control end of the voltage reducing circuit, and the output end of the voltage reducing circuit is connected with the negative pole of the lamp string. The first voltage boosting circuit and the second voltage boosting circuit have the same circuit structure.

3. The drive circuit according to claim 2, characterized in that, The processor is connected with the enable pin of the voltage boosting chip, the input pin of the voltage boosting chip is connected with a direct current power supply and one end of the inductor, the switch control pin of the voltage boosting chip is connected with the other end of the inductor and the anode of the Schottky diode, and the cathode of the Schottky diode is connected with the output end of the first voltage boosting circuit. The first voltage boosting circuit further comprises a first resistor and a second resistor.

4. The drive circuit according to claim 3, characterized in that, One end of the first resistor is connected with the output end of the first voltage boosting circuit, the other end of the first resistor is connected with the feedback pin of the voltage boosting chip and one end of the second resistor, and the other end of the second resistor is grounded.

5. The drive circuit according to claim 1, characterized by The feedback pin of the voltage boosting chip in the first voltage boosting circuit is connected with the feedback pin of the voltage boosting chip in the second voltage boosting circuit. The first voltage boosting circuit further comprises a first filter capacitor and a second filter capacitor. One end of the first filter capacitor and one end of the second filter capacitor are connected with the output end of the first voltage boosting circuit.

6. The drive circuit of claim 1, wherein The other end of the first filter capacitor and the other end of the second filter capacitor are grounded. The current sharing circuit comprises a third resistor and a fourth resistor. One end of the third resistor is connected with the output end of the first voltage boosting circuit, and one end of the fourth resistor is connected with the output end of the second voltage boosting circuit.

7. The drive circuit of claim 1, wherein The other end of the third resistor and the other end of the fourth resistor are connected with the positive pole of the lamp string. The voltage reducing circuit comprises a voltage reducing chip. The processor is connected with the dimming pin of the voltage reducing chip, and the power supply end of the voltage reducing chip is connected with a direct current power supply.

8. The drive circuit according to claim 7, characterized in that, The drive pin of the voltage reducing chip and the clock enable pin of the voltage reducing chip are connected with the output end of the voltage reducing circuit. The voltage reducing circuit further comprises a fifth resistor and a sixth resistor. One end of the fifth resistor and one end of the sixth resistor are connected with the current setting pin of the voltage reducing chip.

9. The drive circuit of claim 1, wherein, The other end of the fifth resistor and the other end of the sixth resistor are grounded. The driving circuit further comprises a direct current power supply. The direct current power supply is connected with the first voltage boosting circuit, the second voltage boosting circuit, the voltage reducing circuit and the processor.

10. An electronic device, comprising: The electronic device includes the drive circuit according to any one of claims 1 to 9.

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