Multi-source power supply power supply control circuit

Abstract

The utility model discloses a multi-source power supply power supply control circuit, which comprises a direct current power supply loop, a power generation power supply loop, an interface power supply loop and a battery power supply loop, wherein the direct current power supply loop, the power generation power supply loop, the interface power supply loop and the battery power supply loop can independently output a power supply for a monitoring camera to work normally; and the interface power supply loop interacts with the battery power supply loop, and the interface power supply loop and the battery power supply loop work cooperatively, so that electric energy is fully utilized, and uninterrupted power supply to the monitoring camera is ensured to the greatest extent.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, and particularly relates to a multi-source power supply. Background Art

[0002] Surveillance cameras need a long-term, stable, and uninterrupted power supply to ensure the stable operation of the cameras for effective monitoring of the target area. However, for outdoor surveillance cameras installed outdoors, due to reasons such as being far from populated areas, environmental erosion, and weather effects, their power supply problems have been difficult to solve. In the prior art, a single wired power supply connection or an independent battery power supply method is often used to provide power for outdoor surveillance cameras, but the above two power supply methods have obvious defects in specific applications: Since the outdoor area is large, laying wired power lines not only has high costs but also consumes a large amount of electrical energy during transmission; for surveillance cameras equipped with independent batteries, various factors such as the service life of the batteries and outdoor weather changes will affect the power supply capacity of the batteries, and the surveillance cameras still cannot ensure a stable power supply. Content of the Utility Model

[0003] Based on this, it is necessary to provide a power control circuit with multiple types and multiple power supply sources, where different power supplies are independent of each other and work together to provide a long-term, stable, and uninterrupted power supply to the surveillance camera.

[0004] The technical solution of the utility model is as follows:

[0005] A power control circuit for multi-source power supply, comprising:

[0006] A DC power supply circuit: used to connect an external DC power supply and convert the external DC power supply into a power supply adapted to the surveillance camera and supply it to the surveillance camera;

[0007] A power generation power supply circuit: used to connect a solar panel and convert the electricity generated at the solar panel into a power supply adapted to the surveillance camera and supply it to the surveillance camera;

[0008] An interface power supply circuit: used to connect an external USB power supply and convert the power supply at the external USB interface into a power supply adapted to the surveillance camera and supply it to the surveillance camera;

[0009] A battery power supply circuit: used to connect a storage battery and convert the power supply of the storage battery into a power supply adapted to the surveillance camera and supply it to the surveillance camera.

[0010] Optionally, the DC power supply circuit includes a DC input diode, a DC input capacitor, a DC voltage conversion chip, a DC output inductor, a DC output capacitor, a first DC output feedback resistor, and a second DC output feedback resistor; the anode of the DC input diode is connected to an external DC power supply, and the cathode of the DC input diode is connected to the DC voltage conversion chip; one end of the DC input capacitor is connected to the common terminal of the DC input diode and the DC voltage conversion chip, and the other end of the DC input capacitor is grounded; the DC voltage conversion chip can change the voltage amplitude, boosting or bucking the original voltage of the external DC power supply to a voltage matching the monitoring camera; one end of the DC output inductor is connected to the DC voltage conversion chip, and the other end of the DC output inductor is led out to be the camera power supply terminal to supply power to the monitoring camera; one end of the DC output capacitor is connected to the end of the DC output inductor away from the DC voltage conversion chip, and the other end is grounded; one end of the first DC output feedback resistor is connected to the common terminal of the DC output inductor and the DC output capacitor, the other end of the first DC output feedback resistor is connected to one end of the second DC output feedback resistor, and the other end of the second DC output feedback resistor is grounded; the common terminal of the first DC output feedback resistor and the second DC output feedback resistor is connected to the DC voltage conversion chip.

[0011] Optionally, the specific model of the DC voltage conversion chip is TCS4226, the external DC power supply provides 12V DC power, and the end of the DC output inductor away from the DC voltage conversion chip is led out to provide 5V DC power for the monitoring camera.

[0012] Optionally, the power supply circuit of the power generation source includes a solar input diode, a solar input capacitor, a solar voltage conversion chip, a solar output inductor, a solar output capacitor, a first solar output feedback resistor, and a second solar output feedback resistor; the anode of the solar input diode is connected to an external solar power supply, and the cathode of the solar input diode is connected to the solar voltage conversion chip; one end of the solar input capacitor is connected to the common terminal of the solar input diode and the solar voltage conversion chip, and the other end of the solar input capacitor is grounded; the solar voltage conversion chip can change the voltage amplitude, boosting or bucking the original voltage of the external solar power supply to a voltage matching the monitoring camera; one end of the solar output inductor is connected to the solar voltage conversion chip, and the other end of the solar output inductor is led out to be the camera power supply terminal to supply power to the monitoring camera; one end of the solar output capacitor is connected to the end of the solar output inductor far from the solar voltage conversion chip, and the other end is grounded; one end of the first solar output feedback resistor is connected to the common terminal of the solar output inductor and the solar output capacitor, the other end of the first solar output feedback resistor is connected to one end of the second solar output feedback resistor, and the other end of the second solar output feedback resistor is grounded; the common terminal of the first solar output feedback resistor and the second solar output feedback resistor is connected to the solar voltage conversion chip.

[0013] Optionally, the specific model of the solar voltage conversion chip is TCS4226, the external solar power supply provides 12V DC power, and the end of the solar output inductor far from the solar voltage conversion chip is led out to provide 5V DC power for the monitoring camera.

[0014] Optionally, the interface power supply circuit includes an input interface, an interface input capacitor, and an interface input resistor; the input interface can be connected to an external USB power supply to guide the 5V DC power provided by the external USB power supply to access; one end of the interface input capacitor is connected to the input interface, the other end of the interface input capacitor is grounded, and the common terminal of the interface input capacitor and the input interface is led out to provide 5V DC power for the monitoring camera; one end of the interface input resistor is connected to the common terminal of the input interface and the interface input capacitor, and the other end of the interface input resistor is grounded.

[0015] Optionally, the interface power supply circuit further includes a power management chip, a first management resistor, a second management resistor, a third management resistor, a fourth management resistor, a first management diode, a second management diode, a third management diode, a management MOS transistor, a management output capacitor, and a voltage supervision chip; the power management chip is used for performing power detection and output management on at least one power supply, the 5V DC power supply led out from the common end of the interface input capacitor and the input interface is connected to the power management chip, and the power management chip outputs a management power supply; one end of the first management resistor is connected to the management power supply output from the power management chip, the other end of the first management resistor is connected to one end of the second management resistor, and the other end of the second management resistor is grounded; the anode of the first management diode is connected to the management power supply output from the power management chip, the cathode of the first management diode is connected to one end of the third management resistor, and the other end of the third management resistor is connected to the drain of the management MOS transistor; the anode of the second management diode is connected to the management power supply output from the power management chip, the cathode of the second management diode is connected to the source of the management MOS transistor; the anode of the third management diode is connected to the drain of the management MOS transistor, and the cathode of the third management diode is connected to the source of the management MOS transistor; one end of the fourth management resistor is connected to the common end of the first management resistor and the second management resistor, the other end of the fourth management resistor is connected to the gate of the management MOS transistor, one end of the management output capacitor is connected to the source of the management MOS transistor, the other end of the management output capacitor is grounded, and the common end of the management output capacitor and the management MOS transistor is connected to the voltage supervision chip; the voltage supervision chip is used for performing overvoltage and / or undervoltage supervision on the input voltage.

[0016] Optionally, the specific model of the power management chip is: WS3222D-8 / TR; the specific model of the voltage supervision chip is: TCS2165; multiple voltage sources are led out from the output end of the voltage supervision chip and are used as power supply voltages to supply an external battery circuit and / or an external clock circuit respectively.

[0017] Optionally, the battery power supply circuit includes a battery interface, a charging management chip, a first charging inductor, a first charging capacitor, a first charging resistor, a second charging resistor, and a third charging resistor; the battery interface is connected to an external storage battery, and the battery interface is also connected to the charging management chip; the charging management chip is used to manage the charging and discharging conditions of the external storage battery, and the charging management chip accesses the management power output from the power management chip; one end of the first charging inductor is connected to the charging management chip, and the other end of the first charging inductor is led out as a charging power supply, which is connected to the battery interface and supplied to the external storage battery to charge the external storage battery; one end of the first charging capacitor is connected to the end of the first charging inductor away from the charging management chip, and the other end of the first charging capacitor is grounded; one end of the first charging resistor is connected to the charging management chip, and the other end of the first charging resistor is connected to the charging power supply; the external storage battery accesses the temperature-sensitive signal at the external storage battery through the battery interface, one end of the second charging resistor is connected to the external storage battery and accesses the temperature-sensitive signal at the external storage battery, and the other end of the second charging resistor is connected to the charging management chip; one end of the third charging resistor is connected to the common end of the second charging resistor and the charging management chip, and the other end of the third charging resistor is grounded.

[0018] Optionally, the specific model of the charging management chip is: IP2312; the battery interface includes a first terminal, a second terminal, and a third terminal; the first terminal is grounded; the third terminal is connected to the end of the first charging inductor away from the charging management chip to charge the external storage battery; the second terminal accesses the temperature-sensitive signal at the external storage battery.

[0019] The beneficial effects of the technical solution of the present invention are: the DC power supply circuit, the power generation power supply circuit, the interface power supply circuit, and the battery power supply circuit can independently output a power supply to supply the normal operation of the monitoring camera, and the interface power supply circuit also interacts with the battery power supply circuit, and the two work together to make full use of electric energy and ensure uninterrupted power supply to the monitoring camera to the greatest extent. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a circuit schematic diagram of a power control circuit with multi-source power supply provided in an embodiment.

[0022] Figure 2 is Figure 1 A partial enlarged view of part I in

[0023] Figure 3 is Figure 1 A partial enlarged view of part II in

[0024] Figure 4 is Figure 1 A partial enlarged view of part III in

[0025] Figure 5 is Figure 1 A partial enlarged view of part IV in

[0026] Figure 6 is Figure 1 A partial enlarged view of part V in

[0027] Figure 7 is Figure 1 A partial enlarged view of part VI in

[0028] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings in combination with embodiments. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] Please refer to Figure 1-7 。

[0033] In this specific embodiment, a power control circuit with multi-source power supply is provided, which includes a DC power supply loop, a power generation power supply loop, an interface power supply loop, and a battery power supply loop.

[0034] Among them, the DC power supply loop is used to connect to an external DC power supply and convert the external DC power supply into a power supply adapted to the monitoring camera to supply the monitoring camera.

[0035] The power generation power supply loop is used to connect to a solar panel and convert the electricity generated at the solar panel into a power supply adapted to the monitoring camera to supply the monitoring camera.

[0036] The interface power supply loop is used to connect to an external USB power supply and convert the power supply at the external USB interface into a power supply adapted to the monitoring camera to supply the monitoring camera.

[0037] The battery power supply loop is used to connect to a storage battery and convert the power supply of the storage battery into a power supply adapted to the monitoring camera to supply the monitoring camera. The DC power supply loop, the power generation power supply loop, the interface power supply loop, and the battery power supply loop work independently. Each loop can stably output a 5V power supply adapted to the monitoring camera. The power supplies of the four loops are different. Once one of the loops fails and cannot supply power normally, the other loops will not be affected by the faulty loop and will supply power as a supplement, ensuring that the monitoring camera obtains a long-term, stable, reliable, and uninterrupted power supply, providing energy support for the monitoring camera to stably record and monitor the target area for a long time.

[0038] In this specific embodiment, the DC power supply circuit includes a DC input diode D3, a DC input capacitor C179, a DC voltage conversion chip U12, a DC output inductor L4, a DC output capacitor C175, a first DC output feedback resistor R157, and a second DC output feedback resistor R156; the anode of the DC input diode D3 is connected to an external DC power supply VIN, and the cathode of the DC input diode D3 is connected to the DC voltage conversion chip U12; one end of the DC input capacitor C179 is connected to the common terminal of the DC input diode D3 and the DC voltage conversion chip U12, and the other end of the DC input capacitor C179 is grounded; the DC voltage conversion chip U12 can change the voltage amplitude, stepping up or stepping down the original voltage of the external DC power supply VIN to a voltage matching the surveillance camera; one end of the DC output inductor L4 is connected to the DC voltage conversion chip U12, and the other end of the DC output inductor L4 is led out to become the camera power supply terminal 5V_IN to supply power to the surveillance camera; one end of the DC output capacitor C175 is connected to the end of the DC output inductor L4 far from the DC voltage conversion chip U12, and the other end is grounded; one end of the first DC output feedback resistor R157 is connected to the common terminal of the DC output inductor L4 and the DC output capacitor C175, the other end of the first DC output feedback resistor R157 is connected to one end of the second DC output feedback resistor R156, and the other end of the second DC output feedback resistor R156 is grounded; the common terminal of the first DC output feedback resistor R157 and the second DC output feedback resistor R156 is connected to the DC voltage conversion chip U12. The specific model of the DC voltage conversion chip U12 is TCS4226, the external DC power supply provides 12V DC power VIN, and the end of the DC output inductor L4 far from the DC voltage conversion chip U12 is led out to 5V_IN to provide 5V DC power for the surveillance camera. As a high-voltage step-down DCDC chip, TCS4226 is widely used in occasions such as gateways, security, industrial control, and medical treatment. TCS422 supports a wide input range, can support a maximum of 2A large current and 30V high-voltage input, and can stably output 5V voltage. Applying TCS4226 in this specific embodiment as the DC voltage conversion chip U12 can make full use of its characteristics of wide input and stable output to convert the 12V DC power provided by the external DC power supply into suitable 5V DC power and provide a stable power supply for the surveillance camera when needed.

[0039] In this specific embodiment, the power supply circuit of the power generation power source includes a solar input diode D6, a solar input capacitor C192, a solar voltage conversion chip U31, a solar output inductor L17, a solar output capacitor C190, a first solar output feedback resistor R186, and a second solar output feedback resistor R185; the anode of the solar input diode D6 is connected to the external solar power generation power supply SOLAR, and the cathode of the solar input diode D6 is connected to the solar voltage conversion chip U31; one end of the solar input capacitor C192 is connected to the common terminal of the solar input diode D6 and the solar voltage conversion chip U31, and the other end of the solar input capacitor C192 is grounded; the solar voltage conversion chip U31 can change the voltage amplitude, boosting or bucking the original voltage of the external solar power supply SOLAR to a voltage matching the monitoring camera; one end of the solar output inductor L17 is connected to the solar voltage conversion chip U31, and the other end of the solar output inductor U31 is led out to become the camera power supply terminal 5V_IN to supply power to the monitoring camera; one end of the solar output capacitor C190 is connected to the end of the solar output inductor L17 far from the solar voltage conversion chip U31, and the other end is grounded; one end of the first solar output feedback resistor R186 is connected to the common terminal of the solar output inductor L17 and the solar output capacitor C189, the other end of the first solar output feedback resistor R186 is connected to one end of the second solar output feedback resistor R185, and the other end of the second solar output feedback resistor R185 is grounded; the common terminal of the first solar output feedback resistor R186 and the second solar output feedback resistor R185 is connected to the solar voltage conversion chip U31. The specific model of the solar voltage conversion chip U31 is TCS4226, the external solar power generation power supply provides 12V direct current, and the end of the solar output inductor L17 far from the solar voltage conversion chip U31 is led out to provide 5V direct current 5V_IN for the monitoring camera. As recorded above, TCS4226 can support a maximum input of 2A 30V. Applying it to this specific embodiment as the solar voltage conversion chip U31 can address the problem that the external solar power generation power supply SOLAR may have unstable voltage due to factors such as lighting conditions or other power generation factors affecting the power generation effect, so as to continuously and stably convert the direct current provided by the external solar power generation power supply SOLAR into a suitable 5V direct current 5V_IN and provide a stable power supply for the monitoring camera when needed.

[0040] In this specific embodiment, the interface power supply circuit includes an input interface USB2, an interface input capacitor C289, and an interface input resistor R196. The input interface USB2 can be connected to an external USB power supply to guide the 5V DC power provided by the external USB power supply to access. One end of the interface input capacitor C289 is connected to the input interface USB2, the other end of the interface input capacitor C289 is grounded, and the common end of the interface input capacitor C289 and the input interface USB2 is led out to provide 5V DC power 5V_IN for the surveillance camera. One end of the interface input resistor R196 is connected to the common end of the input interface USB2 and the interface input capacitor C289, and the other end of the interface input resistor R196 is grounded. The external USB power supply provides 5V DC power, which can be directly matched with the surveillance camera after being accessed through the input interface and directly supply the surveillance camera to work.

[0041] In this specific embodiment, the interface power supply circuit further includes a power management chip U112, a first management resistor R15, a second management resistor R6, a third management resistor R391, a fourth management resistor R53, a first management diode D27, a second management diode D7, a third management diode D1, a management MOS transistor Q7, a management output capacitor C63, and a voltage supervision chip U32; the power management chip U112 is used for performing power detection and output management on at least one power supply. The 5V DC power supply 5V_IN led out from the common terminal of the interface input capacitor C289 and the input interface USB2 is connected to the power management chip U112, and the power management chip U112 outputs a management power supply +5V; one end of the first management resistor R15 is connected to the management power supply +5V output at the power management chip U112, and the other end of the first management resistor R15 is connected to one end of the second management resistor R6, and the other end of the second management resistor R6 is grounded; the anode of the first management diode D27 is connected to the management power supply +5V output at the power management chip U112, and the cathode of the first management diode D27 is connected to one end of the third management resistor R391, and the other end of the third management resistor R391 is connected to the drain of the management MOS transistor Q7; the anode of the second management diode D7 is connected to the management power supply +5V output at the power management chip U112, and the cathode of the second management diode D7 is connected to the source of the management MOS transistor Q7; the anode of the third management diode D1 is connected to the drain of the management MOS transistor Q7, and the cathode of the third management diode D1 is connected to the source of the management MOS transistor Q7; one end of the fourth management resistor R53 is connected to the common terminal of the first management resistor R15 and the second management resistor R6, and the other end of the fourth management resistor R53 is connected to the gate of the management MOS transistor Q7. One end of the management output capacitor C63 is connected to the source of the management MOS transistor Q7, and the other end of the management output capacitor C63 is grounded. The common terminal of the management output capacitor C63 and the management MOS transistor Q7 is connected to the voltage supervision chip U32; the voltage supervision chip U32 is used for performing overvoltage and / or undervoltage supervision on the input voltage. In this specific embodiment, the specific model of the power management chip U112 is: WS3222D-8 / TR; the specific model of the voltage supervision chip U32 is: TCS2165; the output terminal of the voltage supervision chip U32 leads out a VCC_BAT voltage source to supply power voltage to an external battery circuit, and leads out VCC_RTC and VDD_RTC voltage sources to supply power voltage to an external clock circuit.The WS3222D-8 / TR has good overvoltage protection ability. When the WS3222D-8 / TR is set in the interface power supply circuit, it can effectively suppress the overvoltage of the circuit itself, and can also effectively prevent the external USB power supply from injecting interference voltage through the input interface USB2, other electronic components or circuits. A stable and reliable 5V DC +5V is output at its output terminal as the management power supply to supply the external battery circuit or the external clock circuit to support the normal operation of the above circuits.

[0042] In this specific embodiment, the battery power supply circuit includes a battery interface J12, a charging management chip U30, a first charging inductor L16, a first charging capacitor C187, a first charging resistor R172, a second charging resistor R211, and a third charging resistor R176; the battery interface J12 is connected to an external storage battery, and the battery interface J12 is also connected to the charging management chip U30; the charging management chip U30 is used to manage the charging and discharging of the external storage battery, and the charging management chip U30 is connected to the management power supply +5V output at the power management chip U112; one end of the first charging inductor L16 is connected to the charging management chip U30, and the other end of the first charging inductor L16 is led out as the charging power supply VBAT, and is connected to the battery interface J12 and supplied to the external storage battery to charge the external storage battery; one end of the first charging capacitor C187 is connected to the end of the first charging inductor L16 far from the charging management chip U30, and the other end of the first charging capacitor C187 is grounded; one end of the first charging resistor R172 is connected to the charging management chip U30, and the other end of the first charging resistor R172 is connected to the charging power supply VBAT; the external storage battery accesses the temperature-sensitive signal NTC at the external storage battery through the battery interface J12, one end of the second charging resistor R211 is connected to the external storage battery and accesses the temperature-sensitive signal NTC at the external storage battery, and the other end of the second charging resistor R211 is connected to the charging management chip U30; one end of the third charging resistor R176 is connected to the common end of the second charging resistor R211 and the charging management chip U30, and the other end of the third charging resistor R176 is grounded. In this specific embodiment, the specific model of the charging management chip U30 is: IP2312; the battery interface includes a first connection terminal J12-1, a second connection terminal J12-2, and a third connection terminal J12-3; the first connection terminal J12-1 is grounded; the third connection terminal J12-3 is connected to the end of the first charging inductor L16 far from the charging management chip U30 to charge the external storage battery; the second connection terminal J12-2 accesses the temperature-sensitive signal NTC at the external storage battery. As a lithium battery synchronous buck charging IC, IP2312 has the characteristics of high efficiency, low power consumption, and high integration. IP2312 adopts a synchronous buck topology structure, which can effectively reduce energy loss and improve charging efficiency during the charging process. Applied to this specific embodiment, it can realize efficient and reliable charging management of the external storage battery.

[0043] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A power control circuit with multi-source power supply, characterized in that Including: DC power supply circuit: used to connect to an external DC power supply and convert the external DC power supply into a power supply adapted to the surveillance camera to supply the surveillance camera; Power generation power supply circuit: used to connect to a solar panel and convert the electricity generated at the solar panel into a power supply adapted to the surveillance camera to supply the surveillance camera; Interface power supply circuit: used to connect to an external USB power supply and convert the power supply at the external USB interface into a power supply adapted to the surveillance camera to supply the surveillance camera; Battery power supply circuit: used to connect to a storage battery and convert the storage battery power supply into a power supply adapted to the surveillance camera to supply the surveillance camera.

2. The power control circuit with multi-source power supply according to claim 1, wherein, The DC power supply circuit includes a DC input diode, a DC input capacitor, a DC voltage conversion chip, a DC output inductor, a DC output capacitor, a first DC output feedback resistor, and a second DC output feedback resistor; the anode of the DC input diode is connected to an external DC power supply, and the cathode of the DC input diode is connected to the DC voltage conversion chip; one end of the DC input capacitor is connected to the common end of the DC input diode and the DC voltage conversion chip, and the other end of the DC input capacitor is grounded; the DC voltage conversion chip can change the voltage amplitude and boost or buck the original voltage of the external DC power supply to a voltage matching the surveillance camera; one end of the DC output inductor is connected to the DC voltage conversion chip, and the other end of the DC output inductor is led out as the camera power supply terminal to supply the surveillance camera; one end of the DC output capacitor is connected to the end of the DC output inductor away from the DC voltage conversion chip, and the other end of the DC output capacitor is grounded; one end of the first DC output feedback resistor is connected to the common end of the DC output inductor and the DC output capacitor, the other end of the first DC output feedback resistor is connected to one end of the second DC output feedback resistor, and the other end of the second DC output feedback resistor is grounded; the common end of the first DC output feedback resistor and the second DC output feedback resistor is connected to the DC voltage conversion chip.

3. The power control circuit with multi-source power supply according to claim 2, characterized in that, The specific model of the DC voltage conversion chip is TCS4226, the external DC power supply provides 12V DC power, and the end of the DC output inductor away from the DC voltage conversion chip is led out to provide 5V DC power for the surveillance camera.

4. The power control circuit with multi-source power supply according to claim 3, characterized in that, The power supply circuit of the power generation power source includes a solar input diode, a solar input capacitor, a solar voltage conversion chip, a solar output inductor, a solar output capacitor, a first solar output feedback resistor, and a second solar output feedback resistor; the anode of the solar input diode is connected to an external solar power generation power supply, and the cathode of the solar input diode is connected to the solar voltage conversion chip; one end of the solar input capacitor is connected to the common end of the solar input diode and the solar voltage conversion chip, and the other end of the solar input capacitor is grounded; the solar voltage conversion chip can change the voltage amplitude, boosting or bucking the original voltage of the external solar power supply to a voltage matching the monitoring camera; one end of the solar output inductor is connected to the solar voltage conversion chip, and the other end of the solar output inductor is led out to be the camera power supply terminal to supply power to the monitoring camera; one end of the solar output capacitor is connected to the end of the solar output inductor away from the solar voltage conversion chip, and the other end of the solar output capacitor is grounded; one end of the first solar output feedback resistor is connected to the common end of the solar output inductor and the solar output capacitor, the other end of the first solar output feedback resistor is connected to one end of the second solar output feedback resistor, and the other end of the second solar output feedback resistor is grounded; the common end of the first solar output feedback resistor and the second solar output feedback resistor is connected to the solar voltage conversion chip.

5. The power control circuit with multi-source power supply according to claim 4, wherein The specific model of the solar voltage conversion chip is TCS4226, and the external solar power generation power supply provides 12V direct current. The end of the solar output inductor away from the solar voltage conversion chip is led out to provide 5V direct current for the monitoring camera.

6. The power control circuit with multi-source power supply according to claim 5, characterized in that The interface power supply circuit includes an input interface, an interface input capacitor, and an interface input resistor; the input interface can be connected to an external USB power supply to guide the 5V direct current provided by the external USB power supply to access; one end of the interface input capacitor is connected to the input interface, the other end of the interface input capacitor is grounded, and the common end of the interface input capacitor and the input interface is led out to provide 5V direct current for the monitoring camera; One end of the interface input resistor is connected to the common end of the input interface and the interface input capacitor, and the other end of the interface input resistor is grounded.

7. The power control circuit with multi-source power supply according to claim 6, characterized in that, The interface power supply circuit further includes a power management chip, a first management resistor, a second management resistor, a third management resistor, a fourth management resistor, a first management diode, a second management diode, a third management diode, a management MOS transistor, a management output capacitor, and a voltage supervision chip; the power management chip is used for power detection and output management of at least one power supply. The 5V direct current led out from the common end of the interface input capacitor and the input interface is connected to the power management chip, and the power management chip outputs a management power supply; One end of the first management resistor is connected to the management power supply output at the power management chip, the other end of the first management resistor is connected to one end of the second management resistor, and the other end of the second management resistor is grounded; the anode of the first management diode is connected to the management power supply output at the power management chip, the cathode of the first management diode is connected to one end of the third management resistor, and the other end of the third management resistor is connected to the drain of the management MOS transistor; the anode of the second management diode is connected to the management power supply output at the power management chip, and the cathode of the second management diode is connected to the source of the management MOS transistor; The anode of the third management diode is connected to the drain of the management MOS transistor, and the cathode of the third management diode is connected to the source of the management MOS transistor; One end of the fourth management resistor is connected to the common end of the first management resistor and the second management resistor, the other end of the fourth management resistor is connected to the gate of the management MOS transistor, one end of the management output capacitor is connected to the source of the management MOS transistor, the other end of the management output capacitor is grounded, and the common end of the management output capacitor and the management MOS transistor is connected to the voltage supervision chip; the voltage supervision chip is used to perform overvoltage and / or undervoltage supervision on the input voltage.

8. The power control circuit with multi-source power supply according to claim 7, characterized in that, The specific model of the power management chip is: WS3222D-8 / TR; the specific model of the voltage supervision chip is: TCS2165; the output end of the voltage supervision chip leads out a plurality of voltage sources for supplying power voltages to an external battery circuit and / or an external clock circuit respectively.

9. The power control circuit with multi-source power supply as claimed in claim 8, wherein The battery power supply loop includes a battery interface, a charging management chip, a first charging inductor, a first charging capacitor, a first charging resistor, a second charging resistor, and a third charging resistor; the battery interface is connected to an external storage battery, and the battery interface is also connected to the charging management chip; the charging management chip is used to manage the charging and discharging conditions of the external storage battery, and the charging management chip is connected to the management power supply output at the power management chip; one end of the first charging inductor is connected to the charging management chip, the other end of the first charging inductor is led out as a charging power supply, and is connected to the battery interface and supplied to the external storage battery to charge the external storage battery; one end of the first charging capacitor is connected to the end of the first charging inductor away from the charging management chip, and the other end of the first charging capacitor is grounded; one end of the first charging resistor is connected to the charging management chip, and the other end of the first charging resistor is connected to the charging power supply; The external storage battery accesses the temperature-sensitive signal at the external storage battery through the battery interface, one end of the second charging resistor is connected to the external storage battery and accesses the temperature-sensitive signal at the external storage battery, and the other end of the second charging resistor is connected to the charging management chip; One end of the third charging resistor is connected to the common end of the second charging resistor and the charging management chip, and the other end of the third charging resistor is grounded.

10. The power control circuit with multi-source power supply according to claim 9, wherein The specific model of the charging management chip is: IP2312; the battery interface includes a first terminal, a second terminal, and a third terminal; the first terminal is grounded; the third terminal is connected to one end of the first charging inductor away from the charging management chip to charge an external storage battery; the second terminal accesses the temperature-sensitive signal at the external storage battery connection point.

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