Power supply system based on network program control

Abstract

The utility model provides a power supply system based on network program control, which comprises a filter circuit for filtering alternating current clutters, the filter circuit is connected with a secondary step-down circuit through a primary step-down circuit so as to output low-voltage direct current, and the filter circuit is connected with a tertiary step-down circuit so as to output low-voltage direct current; the second-stage voltage reduction circuit and the third-stage voltage reduction circuit are connected with a switch through a switching circuit, and the switch is in data intercommunication with an upper computer through an optical fiber so as to control the operation of the power supply system. According to the utility model, the power supply system can be remotely controlled to synchronously supply power to a plurality of devices, and the safety of remote power supply is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply technology field, concretely relates to a power supply system based on network program control. BACKGROUND

[0002] When doing industry in dangerous sites such as drilling and digging, the work site is easy to splash gravel, and remote control equipment is generally used. But the rated working frequency and rated working voltage of such equipment are higher than household electricity, and secondary conversion is needed before long-distance transmission to the power equipment. When high-frequency electric energy is transmitted through long wires, the gravel in the environment is easy to damage the long wires and cause electric leakage danger. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model wants to solve the problem of providing a power supply system based on network program control, which can remotely control the power supply system to supply power to multiple devices synchronously and improve the safety of remote power supply.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of:

[0005] A power supply system based on network program control, comprising a filter circuit for filtering AC clutter, the filter circuit is connected with a two-stage voltage reduction circuit through a one-stage voltage reduction circuit to output low-voltage direct current, the filter circuit is connected with a three-stage voltage reduction circuit to output low-voltage direct current;

[0006] The two-stage voltage reduction circuit and the three-stage voltage reduction circuit are connected with a switch circuit and a switch, the switch is connected with an upper computer through an optical fiber to control the operation of the power supply system.

[0007] Further, the switch is connected with the power equipment through a multi-channel high-speed network port to realize the transmission of the power equipment data; the two-stage voltage reduction circuit and the three-stage voltage reduction circuit are connected with the switch through a sampling circuit to transmit the power supply voltage of the power supply system.

[0008] Further, the filter circuit comprises a filter inductor L1, one end and two ends of the filter inductor L1 are connected with AC / L end and AC / N end of the output AC respectively, four end and three end of the filter inductor L1 are connected with one end and two end of filter inductor L2 respectively.

[0009] Further, the one-stage voltage reduction circuit comprises a voltage regulating chip U6, AC1 pin of the voltage regulating chip U6 is connected with two end of diode rectifier circuit BR1, one end and three end of the diode rectifier circuit BR1 are connected with four end and three end of filter inductor L2 respectively, +VO pin and -VO pin of the voltage regulating chip U6 are used for connecting with the two-stage voltage reduction circuit.

[0010] Further, the secondary voltage reduction circuit includes a voltage regulating chip SP4, a +VIN pin and a -VIN pin of the voltage regulating chip SP4 are connected with a 3 end and a 4 end of a filter inductor L10 respectively, a 1 end and a 2 end of the filter inductor L10 are connected with a +VO pin and a -VO pin of a voltage regulating chip U6 respectively;

[0011] A +VOUT pin and a -VOUT pin of the voltage regulating chip SP4 are connected with a 2 end and a 1 end of a filter inductor L9 respectively, a 3 end and a 4 end of the filter inductor L9 are connected with a plurality of first interfaces CN in series, the first interfaces CN provide low-voltage direct current for electrical equipment.

[0012] Further, the tertiary voltage reduction circuit includes a voltage regulating chip SP1, an AC1 pin and an AC2 pin of the voltage regulating chip SP1 are connected with a 4 end and a 3 end of a filter inductor L2 respectively, a +VO pin and a -VO pin of the voltage regulating chip SP1 are connected with a 1 end and a 2 end of a filter inductor L3 respectively, a 4 end and a 3 end of the filter inductor L3 are connected with a plurality of second interfaces CN in series, the second interfaces CN provide low-voltage alternating current for electrical equipment.

[0013] The AC1 pin and the AC2 pin of the voltage regulating chip SP1 are interconnected with an AC1 pin and an AC2 pin of a voltage regulating chip SP2 respectively, the +VO pin and the -VO pin of the voltage regulating chip SP1 are interconnected with a +VO pin and a -VO pin of the voltage regulating chip SP2 respectively, so as to improve the stability of the output alternating current energy.

[0014] Further, the switching circuit includes a first switching circuit connected with the secondary voltage reduction circuit, the first switching circuit includes a triode Q4 and a photoelectric coupler U9, a collector of the triode Q4 is connected with a CTRL pin of the voltage regulating chip SP4, an emitter of the triode Q4 is connected with a -VIN pin of the voltage regulating chip SP4;

[0015] A resistance R64 and a resistance R65 are connected in series between the +VIN pin and the -VIN pin of the voltage regulating chip SP4, a base of the triode Q4 is connected between the resistance R64 and the resistance R6, the base of the triode Q4 is connected with a 4 end of the photoelectric coupler U9, a 1 end of the photoelectric coupler U9 is connected with a switch.

[0016] Further, the switch circuit comprises a second switch circuit connected with the three-stage voltage reduction circuit, the second switch circuit comprises a photoelectric coupler U7 and a photoelectric coupler U8, the 4th end and the 3rd end of the photoelectric coupler U8 are connected with the CNT pin and the COM pin of the voltage regulation chip SP2 respectively, the 1st end of the photoelectric coupler U8 is connected with the 2nd end of the photoelectric coupler U7, the 4th end and the 3rd end of the photoelectric coupler U7 are connected with the CNT pin and the COM pin of the voltage regulation chip SP1 respectively, and the 1st end of the photoelectric coupler U7 is connected with the switch.

[0017] Further, the sampling circuit comprises a sampling chip U5, the SO+ pin and the SO- pin of the sampling chip U5 are connected with the 1st end and the 2nd end of the first interface CN or the second interface CN respectively, and the SI+ pin and the SI- pin of the sampling chip U5 are connected with the switch.

[0018] Further, the two-stage voltage reduction circuit is connected with the switch through the four-stage voltage reduction circuit, the four-stage voltage reduction circuit comprises a voltage regulation chip U13, the +VIN pin and the -VIN pin of the voltage regulation chip U13 are interconnected with the +VIN pin and the -VIN pin of the voltage regulation chip SP4 respectively, and the +VIN pin and the -VIN pin of the voltage regulation chip U13 are connected with the switch to supply power to the switch.

[0019] The utility model has the advantages and positive effects that:

[0020] By setting the switch in the power supply system, the switch is connected with the host computer through optical fiber, the charging system is connected with the network end through the switch, and the power supply system is remotely controlled through the network program, the switch is connected with the electric equipment through the multi-channel network cable, the optical fiber communication and the high speed network port can reduce the transmission delay of data and improve the reaction speed of the power supply system.

[0021] By setting the one-stage voltage reduction circuit, the two-stage voltage reduction circuit, the three-stage voltage reduction circuit and the four-stage voltage reduction circuit, multi-channel voltage output is realized to supply power to multiple electric equipment synchronously.

[0022] By setting the sampling circuit and the switch circuit, the sampling circuit is used for monitoring the power supply voltage of the two-stage voltage reduction circuit and the three-stage voltage reduction circuit, and the monitoring result is transmitted to the host computer through the switch, and the host computer controls the corresponding voltage reduction circuit to be disconnected according to the monitoring result, so that the power supply system is protected. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings are used to provide further understanding of the utility model and constitute a part of the specification, are used to explain the utility model together with the embodiments of the utility model and do not constitute the limitation to the utility model.In the drawings:

[0024] Figure 1It is a whole system diagram of a power supply system based on network program control of the utility model;

[0025] Figure 2 It is a filter circuit diagram of a power supply system based on network program control of the utility model;

[0026] Figure 3 It is a first step down circuit diagram of a power supply system based on network program control of the utility model;

[0027] Figure 4 It is a second step down circuit diagram of a power supply system based on network program control of the utility model;

[0028] Figure 5 It is a first switch circuit diagram of a power supply system based on network program control of the utility model;

[0029] Figure 6 It is a third step down circuit diagram of a power supply system based on network program control of the utility model;

[0030] Figure 7 It is a sampling circuit diagram of a power supply system based on network program control of the utility model;

[0031] Figure 8 It is a fourth step down circuit diagram of a power supply system based on network program control of the utility model. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the utility model.

[0033] Unless otherwise defined, all the technical and scientific terms used in the present document have the same meanings as those commonly understood by those skilled in the art to which the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not intended to limit the utility model. The term "and / or" used in the present document includes any and all combinations of one or more related listed items.

[0034] The utility model provides a kind of power supply system based on network program control, such as Figure 1As shown, the filter circuit is connected with the first-stage voltage reduction circuit and the second-stage voltage reduction circuit, the first-stage voltage reduction circuit converts the AC power into DC power and reduces the voltage once, and the second-stage voltage reduction circuit reduces the voltage twice. The filter circuit is connected with the third-stage voltage reduction circuit, and the third-stage voltage reduction circuit is used for converting the high-voltage AC power into low-voltage DC power. The first-stage voltage reduction circuit, the second-stage voltage reduction circuit and the third-stage voltage reduction circuit are connected with the switch circuit and the switch, and the switch is connected with the first-stage voltage reduction circuit, the second-stage voltage reduction circuit and the third-stage voltage reduction circuit through the sampling circuit, and is used for monitoring the output voltage. The switch is connected with the host computer through the optical fiber, and is connected with the power-using equipment through the multi-channel high-speed network port, so as to realize the transmission of the monitoring data of the power-using equipment, and the optical fiber and the high-speed network port can improve the communication rate of the charging system and the host computer, improve the reaction speed of the power supply system, and monitor the fault condition of the power-using equipment.

[0035] The host computer quickly obtains the power supply condition of the second-stage voltage reduction circuit and the third-stage voltage reduction circuit through the switch and the sampling circuit, and when the monitored voltage or power is abnormal, the host computer disconnects the corresponding voltage reduction circuit through the switch and the switch circuit.

[0036] In an embodiment of the present application, the filter circuit is connected with two first-stage voltage reduction circuits, each of which is used for converting the 220V AC power into DC power and reducing the voltage to 48V 500W low-voltage DC power; each first-stage voltage reduction circuit is connected with two second-stage voltage reduction circuits, which respectively convert the 48V 500W low-voltage DC power into 28V 400W and 24V 100W low-voltage DC power; and the third-stage voltage reduction circuit can convert the 220V AC power into 36V 500W DC power. The second-stage voltage reduction circuit and the third-stage voltage reduction circuit are respectively connected with a plurality of power-using equipment, so that the power supply system can supply power to different power-using equipment at the same time.

[0037] The high-speed network port of the switch is connected with a plurality of power-using equipment through a multi-channel network cable, the switch is connected with the host computer through the optical fiber, and the host computer can quickly collect the running condition of the power-using equipment, and when the running fault of the power-using equipment is monitored, the corresponding voltage reduction circuit is disconnected through the switch circuit.

[0038] As shown in Figure 2 The filter circuit includes a filter inductor L1 and a filter inductor L2, the 1 end and the 2 end of the filter inductor L1 are respectively connected with the AC / L end and the AC / N end of the output 220V AC power, the 4 end and the 3 end of the filter inductor L1 are respectively connected with the 1 end and the 2 end of the filter inductor L2, and the 3 end and the 4 end of the filter inductor L2 output the filtered AC power. The 1 end and the 2 end of the filter inductor L2 are connected in series with a capacitor C8, the 3 end and the 4 end of the filter inductor L2 are connected in series with a capacitor C9, and the 1 end and the 2 end of the filter inductor L1 are connected in series with a capacitor C7, which are used for further filtering out the noise.

[0039] AsFigure 3 As shown in the figure, the first voltage reduction circuit includes voltage regulating chip U6, the AC pin of voltage regulating chip U6 is connected with the 2 end of diode rectifier circuit BR1, the 1 end and 3 end of diode rectifier circuit BR1 are connected with the 4 end and 3 end of filter inductor L2 respectively, diode rectifier circuit BR1 converts alternating current into direct current, voltage regulating chip U6 makes first voltage reduction processing, and outputs 48V500W low-voltage direct current from the +VO pin and -VO pin of voltage regulating chip U6.

[0040] In order to improve the stability of the output voltage of voltage regulating chip U6, a π-shaped filter circuit is connected between the +VO pin and -VO pin of voltage regulating chip U6, and the π-shaped filter circuit includes capacitor C117, capacitor C65, capacitor C111, capacitor C112, inductor L4, capacitor C20, capacitor C25, capacitor C26 and capacitor C38.

[0041] As shown in the figure, Figure 4 The second voltage reduction circuit includes voltage regulating chip SP4, the +VIN pin and -VIN pin of voltage regulating chip SP4 are connected with the 3 end and 4 end of filter inductor L10 respectively, the 1 end and 2 end of filter inductor L10 are connected with the +VO pin and -VO pin of voltage regulating chip U6 respectively, so as to receive 48V500W direct current. After the secondary voltage reduction processing of voltage regulating chip SP4, 28V400W or 24V100W electric energy is output through the +VOUT pin and -VOUT pin of voltage regulating chip SP4.

[0042] In order to improve the stability of the output electric energy, the +VOUT pin and -VOUT pin of voltage regulating chip SP4 are connected with the 2 end and 1 end of filter inductor L9 respectively, a plurality of first interfaces CN are connected between the 3 end and 4 end of filter inductor L9, and the first interfaces CN provide low-voltage direct current for the electric equipment.

[0043] In order to improve the stability of the output electric energy of the first interface CN, the capacitor C61 and capacitor C62 are connected between the 3 end and 4 end of filter inductor L9 respectively, and the capacitor C60 and diode D3 are connected between the 1 end and 2 end of filter inductor L9 respectively.

[0044] As shown in the figure, Figure 5As shown, the switch circuit includes a first switch circuit connected with the secondary voltage reduction circuit, and the first switch circuit is connected with the CTRL pin, +VIN pin and -VIN pin of the voltage regulation chip SP4. The first switch circuit includes a triode Q4 and a photoelectric coupler U9, the collector of the triode Q4 is connected with the CTRL pin of the voltage regulation chip SP4, and the emitter of the triode Q4 is connected with the -VIN pin of the voltage regulation chip SP4; the +VIN pin and the -VIN pin of the voltage regulation chip SP4 are connected with the resistance R64 and the resistance R65 in sequence, the base of the triode Q4 is connected between the resistance R64 and the resistance R6, the base of the triode Q4 is connected with the 4th terminal of the photoelectric coupler U9, the 3rd terminal of the photoelectric coupler U9 is connected with the emitter of the triode Q4, and the 1st terminal of the photoelectric coupler U9 is connected with the switch.

[0045] When the secondary voltage reduction circuit is turned on, the host computer makes the photoelectric coupler U9 conduct through the switch, the photoelectric coupler U9 makes the triode Q4 conduct, the voltage of the CTRL pin of the voltage regulation chip SP4 rises, and the voltage regulation chip SP4 runs.

[0046] As shown in the figure, Figure 6 The tertiary voltage reduction circuit includes a voltage regulation chip SP1, the AC1 pin and the AC2 pin of the voltage regulation chip SP1 are connected with the 4th terminal and the 3rd terminal of the filter inductor L2 respectively, for receiving 220V high-voltage alternating current, the voltage regulation chip SP1 converts the high-voltage alternating current into 36V500W low-voltage direct current, and outputs from the +VO pin and the -VO pin of the voltage regulation chip SP1.

[0047] In order to improve the stability of the output voltage and power of the tertiary voltage reduction circuit, the AC1 pin and the AC2 pin of the voltage regulation chip SP1 are interconnected with the AC1 pin and the AC2 pin of the voltage regulation chip SP2 respectively, the +VO pin and the -VO pin of the voltage regulation chip SP1 are interconnected with the +VO pin and the -VO pin of the voltage regulation chip SP2 respectively, the voltage regulation chip SP1 and the voltage regulation chip SP2 are connected in parallel, and both output 36V250W low-voltage direct current, the power is superimposed, and high-power output of direct current is realized.

[0048] In order to improve the stability of the output voltage, the +VO pin and the -VO pin of the voltage regulation chip SP1 are connected with the 1st terminal and the 2nd terminal of the filter inductor L3 respectively, the 1st terminal and the 2nd terminal of the filter inductor L3 are connected with the capacitor C1, the capacitor C2 and the capacitor C3 in sequence respectively, and the 4th terminal and the 3rd terminal of the filter inductor L3 are connected with the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C44 and the capacitor C43 in sequence respectively.

[0049] A plurality of second interfaces CN are connected in sequence between the 4th terminal and the 3rd terminal of the filter inductor L3, and the second interfaces CN provide stable low-voltage alternating current for the electrical equipment.

[0050] As shown in the figure, Figure 6As shown, the third step-down circuit is connected with the second switch circuit, the second switch circuit comprises photoelectric coupler U7 and photoelectric coupler U8, the 4th end and the 3rd end of photoelectric coupler U8 are connected with the CNT pin and the COM pin of voltage regulating chip SP2 respectively, the 1st end of photoelectric coupler U8 is connected with the 2nd end of photoelectric coupler U7, and the 2nd end of photoelectric coupler U8 is grounded.The 4th end and the 3rd end of photoelectric coupler U7 are connected with the CNT pin and the COM pin of voltage regulating chip SP1 respectively, and the 1st end of photoelectric coupler U7 is connected with the switch.When the third step-down circuit needs to be powered, the host computer makes photoelectric coupler U7 and photoelectric coupler U8 conduct simultaneously through the switch, the voltage of the CNT pin and the COM pin of voltage regulating chip SP1 and voltage regulating chip SP2 is pulled up, and voltage regulating chip SP1 and voltage regulating chip SP2 operate.

[0051] As shown in the figure, Figure 7 As shown, the sampling circuit comprises sampling chip U5, the SO+ pin and the SO- pin of sampling chip U5 are connected with the 1st end and the 2nd end of the first interface CN or the second interface CN respectively, the SI+ pin and the SI- pin of sampling chip U5 are connected with the switch, for monitoring the output voltage of each interface CN, when the output voltage of a certain interface CN is monitored to be not up to the requirements, the corresponding step-down circuit is closed through the switch circuit, so that the staff can carry out maintenance and adjustment, and the performance of the power supply system is improved.

[0052] As shown in the figure, Figure 8 As shown, the switch is connected with voltage regulating chip SP4 through the fourth step-down circuit, the fourth step-down circuit comprises voltage regulating chip U13, the +VIN pin and the -VIN pin of voltage regulating chip U13 are interconnected with the +VIN pin and the -VIN pin of voltage regulating chip SP4 respectively, and the +VIN pin and the -VIN pin of voltage regulating chip U13 are connected with the switch, so as to supply 5V power to the switch.

[0053] The above embodiments of the utility model have been described in detail, but the content described can only be the preferred embodiments of the utility model, and cannot be considered as limiting the scope of the utility model. Any equivalent changes and improvements within the scope of the utility model should still belong to the scope covered by the patent.

Claims

1. A power supply system based on network program control, characterized by, The filter circuit comprising AC noise filtering, the filter circuit is connected with the second step-down circuit through the first step-down circuit to output low voltage DC, the filter circuit is connected with the third step-down circuit to output low voltage DC; The second step-down circuit and the third step-down circuit are connected with the switch through the switch circuit, and the switch is connected with the upper computer through the optical fiber, The switch is connected with the electrical equipment through the multi-channel high-speed network interface to realize the transmission of the monitoring electrical equipment data; the second step-down circuit and the third step-down circuit are connected with the switch through the sampling circuit to transmit the monitoring power supply voltage.

2. A power supply system based on network program control according to claim 1, characterized in that, The filter circuit comprises a filter inductor L1, and the 1 end and the 2 end of the filter inductor L1 are connected with the AC / L end and the AC / N end of the output AC respectively, and the 4 end and the 3 end of the filter inductor L1 are connected with the 1 end and the 2 end of the filter inductor L2 respectively.

3. A power supply system based on network program control according to claim 2, characterized in that, The first step-down circuit comprises a voltage regulating chip U6, the AC1 pin of the voltage regulating chip U6 is connected with the 2 end of the diode rectifier circuit BR1, the 1 end and the 3 end of the diode rectifier circuit BR1 are connected with the 4 end and the 3 end of the filter inductor L2 respectively, and the +VO pin and the -VO pin of the voltage regulating chip U6 are used to be connected with the second step-down circuit.

4. A power supply system based on network program control according to claim 3, characterized in that, The second step-down circuit comprises a voltage regulating chip SP4, the +VIN pin and the -VIN pin of the voltage regulating chip SP4 are connected with the 3 end and the 4 end of the filter inductor L10 respectively, and the 1 end and the 2 end of the filter inductor L10 are connected with the +VO pin and the -VO pin of the voltage regulating chip U6 respectively. The +VOUT pin and the -VOUT pin of the voltage regulating chip SP4 are connected with the 2 end and the 1 end of the filter inductor L9 respectively, a plurality of first interfaces CN are connected in series between the 3 end and the 4 end of the filter inductor L9, and the first interfaces CN provide low voltage DC for the electrical equipment.

5. The network program control based power supply system according to claim 3, wherein, The third step-down circuit comprises a voltage regulating chip SP1, the AC1 pin and the AC2 pin of the voltage regulating chip SP1 are connected with the 4 end and the 3 end of the filter inductor L2 respectively, the +VO pin and the VO pin of the voltage regulating chip SP1 are connected with the 1 end and the 2 end of the filter inductor L3 respectively, a plurality of second interfaces CN are connected in series between the 4 end and the 3 end of the filter inductor L3, and the second interfaces CN provide low voltage AC for the electrical equipment. The AC1 pin and the AC2 pin of the voltage regulating chip SP1 are interconnected with the AC1 pin and the AC2 pin of the voltage regulating chip SP2 respectively, and the +VO pin and the -VO pin of the voltage regulating chip SP1 are interconnected with the +VO pin and the -VO pin of the voltage regulating chip SP2 respectively, so as to improve the stability of the output AC power.

6. The network program control based power supply system according to claim 1, wherein, The switch circuit comprises a first switch circuit connected with the second step-down circuit, the first switch circuit comprises a triode Q4 and a photoelectric coupler U9, the collector of the triode Q4 is connected with the CTRL pin of the voltage regulating chip SP4, and the emitter of the triode Q4 is connected with the -VIN pin of the voltage regulating chip SP4. The +VIN pin and the -VIN pin of the voltage regulating chip SP4 are connected with the resistor R64 and the resistor R65 in sequence, the base of the transistor Q4 is connected between the resistor R64 and the resistor R6, the base of the transistor Q4 is connected with the 4th terminal of the photoelectric coupler U9, and the 1st terminal of the photoelectric coupler U9 is connected with the switch.

7. The network program control based power supply system of claim 1, wherein, The switch circuit comprises a second switch circuit connected with the three-stage voltage reduction circuit, the second switch circuit comprises the photoelectric coupler U7 and the photoelectric coupler U8, the 4th terminal and the 3rd terminal of the photoelectric coupler U8 are connected with the CNT pin and the COM pin of the voltage regulating chip SP2 respectively, the 1st terminal of the photoelectric coupler U8 is connected with the 2nd terminal of the photoelectric coupler U7, the 4th terminal and the 3rd terminal of the photoelectric coupler U7 are connected with the CNT pin and the COM pin of the voltage regulating chip SP1 respectively, and the 1st terminal of the photoelectric coupler U7 is connected with the switch.

8. The network program control based power supply system of claim 2, wherein, The sampling circuit comprises the sampling chip U5, the SO+ pin and the SO- pin of the sampling chip U5 are connected with the 1st terminal and the 2nd terminal of the first interface CN or the second interface CN respectively, and the SI+ pin and the SI- pin of the sampling chip U5 are connected with the switch.

9. The network program control based power supply system of claim 1, wherein, The two-stage voltage reduction circuit is connected with the switch through the four-stage voltage reduction circuit, the four-stage voltage reduction circuit comprises the voltage regulating chip U13, the +VIN pin and the -VIN pin of the voltage regulating chip U13 are interconnected with the +VIN pin and the -VIN pin of the voltage regulating chip SP4 respectively, and the +VIN pin and the -VIN pin of the voltage regulating chip U13 are connected with the switch to supply power to the switch.

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