Photoelectric energy collection interface circuit working in multiple modes and control method thereof

Abstract

The invention discloses a multi-mode working photoelectric energy collection interface circuit and a control method thereof, and the circuit comprises a cold start module which is used for generating a pulse signal; the auxiliary boosting module is electrically connected with the cold start module, responds to the pulse signal to generate an output voltage, charges and discharges through an inductor in the auxiliary boosting module to enable the output voltage to be larger than a first threshold value, a first control signal is generated, and the first control signal is used for increasing the photoelectric energy collection speed; the first control signal is also used for controlling the cold start module to close; and the main boosting module is electrically connected with the auxiliary boosting module, generates a second control signal when the output voltage is greater than a second threshold value, and makes the output voltage rise stably in response to the second control signal. According to the invention, rapid and efficient photoelectric energy collection can be realized under a relatively small power supply voltage.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrated circuits, and in particular relates to a multi-mode photoelectric energy collection interface circuit and a control method thereof. Background Art

[0002] IoT sensor nodes are the foundation and core of IoT devices, and have irreplaceable application value in sensor reconnaissance, ecological environment monitoring, smart city construction and other fields. IoT devices have the characteristics of large-scale random distribution. Limited by device size, battery capacity, replacement cost and difficulty, existing battery power supply cannot meet the requirements of IoT devices for long-term operation, which also limits many applications of IoT technology. The solution is to efficiently obtain energy from the working environment and realize long-term self-powering of IoT nodes.

[0003] Using the photovoltaic effect of photodiodes to capture ambient light energy is an effective technical solution. The existing photoelectric energy acquisition interface circuit generally consists of a cold start module and a power stage. The cold start module starts at a certain input voltage and charges the energy storage capacitor to 1.8V. The energy storage capacitor then provides power to the power stage circuit to achieve input voltage boost conversion and photoelectric energy acquisition. Since the output power of photodiodes is generally low, in order to break through the transistor threshold voltage limit, the existing cold start module has the disadvantages of high input voltage requirements and slow startup speed. The existing interface circuit cannot dynamically adjust the equivalent impedance of the interface circuit according to the light intensity to achieve impedance matching and maximum power point tracking under different light intensities.

[0004] Therefore, there is an urgent need to provide a photoelectric energy collection interface circuit to solve the problem of low light energy collection efficiency. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a multi-mode photoelectric energy collection interface circuit and a control method thereof. The technical problem to be solved by the present invention is achieved by the following technical solutions:

[0006] In a first aspect, the present invention provides a multi-mode photoelectric energy collection interface circuit, comprising:

[0007] A cold start module for generating a pulse signal;

[0008] An auxiliary boost module is electrically connected to the cold start module, generates an output voltage in response to the pulse signal, and charges and discharges the inductor in the auxiliary boost module so that the output voltage is greater than a first threshold, and generates a first control signal, the first control signal is used to increase the speed of photoelectric energy collection, and the first control signal is also used to control the cold start module to shut down;

[0009] The main boost module is electrically connected to the auxiliary boost module, generates a second control signal when the output voltage is greater than a second threshold, and responds to the second control signal to stably increase the output voltage.

[0010] In a second aspect, the present invention further provides a control method for a multi-mode photoelectric energy collection interface circuit, which is used to control the multi-mode photoelectric energy collection interface circuit, comprising:

[0011] Obtain pulse signal;

[0012] According to the pulse signal, an output voltage is generated, and the output voltage is gradually increased in a manner of inductive charging and discharging; when the output voltage is greater than a first threshold, a first control signal is generated, and the first control signal is used to increase the collection speed of photoelectric energy;

[0013] When the output voltage is greater than the second threshold, a second control signal is generated; according to the second control signal, the output voltage is gradually increased in a wide input range.

[0014] Beneficial effects of the present invention:

[0015] The present invention provides a multi-mode photoelectric energy collection interface circuit and a control method thereof, comprising a cold start module, an auxiliary boost module and a main boost module, and adopts three working modes of cold start, auxiliary boost and main boost to achieve rapid start-up of the interface circuit under weak light intensity and low input voltage, and can dynamically adjust its own impedance according to the light intensity to achieve maximum power point tracking and efficient energy acquisition, and has the advantages of low starting voltage, fast starting speed, high photoelectric energy acquisition efficiency, etc.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a multi-mode photoelectric energy harvesting interface circuit provided by an embodiment of the present invention;

[0018] Figure 2 is another schematic diagram of a multi-mode photoelectric energy harvesting interface circuit provided by an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of a cold start module in a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of an auxiliary boost module in a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention;

[0021] Figure 5This is a schematic diagram of a main boost module in a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention;

[0022] Figure 6 It is a flow chart of a control method of a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention;

[0023] Figure 7 It is a timing diagram of a control method of a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0025] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention, Figure 2 1 is another schematic diagram of a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention. The multi-mode photoelectric energy collection interface circuit provided by the present invention includes:

[0026] A cold start module for generating a pulse signal;

[0027] The auxiliary boost module is electrically connected to the cold start module and generates an output voltage V in response to the pulse signal. OUT The output voltage V OUT is greater than the first threshold, generating a first control signal V VD2 , the first control signal V VD2 Used to increase the speed of photoelectric energy collection, the first control signal V VD2 It is also used to control the shutdown of the cold start module;

[0028] The main boost module is electrically connected to the auxiliary boost module. When the output voltage V OUT is greater than the second threshold, generating a second control signal V VD3 , and in response to the second control signal V VD3 , so that the output voltage V OUT Steadily rising.

[0029] For more details, please see Figure 1A multi-mode photoelectric energy collection interface circuit provided in this embodiment includes a cold start module, an auxiliary boost module and a main boost module, which are mainly used to realize three working modes: cold start, auxiliary boost and main boost. Through the cold start module, the interface circuit can be quickly started under low voltage input. Through the auxiliary boost module and the main boost module, efficient energy acquisition under a wide input range can be achieved. In this way, fast and efficient photoelectric energy collection can be achieved under a smaller power supply voltage.

[0030] It should be noted that the first threshold may be 600mV, and the second threshold may be 1.0V.

[0031] In an optional embodiment of the present invention, see Figure 3 , Figure 3 1 is a schematic diagram of a cold start module in a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention, wherein the cold start module includes a start oscillator OSC1, a start charge pump CP, a first voltage detector VD1 and a delay unit Delay; wherein,

[0032] An input end of the start oscillator OSC1 receives an input voltage, an output end of the start oscillator OSC1 is electrically connected to an input end of a start charge pump CP, another input end of the start charge pump CP receives an input voltage, an output end of the start charge pump CP is electrically connected to an input end of a first voltage detector VD1, an output end of the first voltage detector VD1 is electrically connected to an input end of a delay unit Delay, an output end of the delay unit Delay is electrically connected to an auxiliary boost module, and another output end of the delay unit Delay is electrically connected to an input end of the start oscillator OSC1.

[0033] In an optional embodiment of the present invention, see Figure 4 , Figure 4 Schematic diagram of an auxiliary boost module in a multi-mode photoelectric energy collection interface circuit provided in an embodiment of the present invention. The auxiliary boost module includes a first switch M N1 , the second switch S 1 , the third switch M P1 , capacitor C OUT , a second voltage detector VD2, a fourth switch S 3 , the secondary oscillator OSC2 and the fifth switch M LS ;in,

[0034] The first switch M N1 The control end of the first switch M is electrically connected to the output end of the delay unit Delay. N1 The first end of the first switch M is grounded. N1 The second end and the first node V SW Electrically connected, one end of the inductor L is connected to the first node VSW The other end of the inductor L receives the input voltage V IN , the second switch S 1 The control end of the second switch S receives a first fixed voltage signal. 1 The first end and the first node V SW Electrical connection, second switch S 1 The second end of the third switch M P1 The first end of the third switch M is electrically connected to P1 The second end and the second node V 2 Electrical connection, third switch M P1 The control terminal and the second node V 2 Electrical connection, the second node V 2 Electrically connected to the output terminal, used to output the output voltage V OUT , capacitor C OUT The first plate is electrically connected to the output terminal, and the capacitor C OUT The second plate is grounded, and the output voltage V OUT The power is stored in capacitor C OUT ;

[0035] The input terminal of the second voltage detector VD2 is connected to the second node V 2 The output terminal of the second voltage detector VD2 is electrically connected to the fourth switch S 3 The control end of the fourth switch S is electrically connected to 3 The first end and the second node V 2 Electrical connection, fourth switch S 3 The second end of the secondary oscillator OSC2 is electrically connected to the input end of the secondary oscillator OSC2, and the output end of the secondary oscillator OSC2 is connected to the third node V through the multiplexer MUX. 3 Electrical connection, fifth switch M LS The control terminal and the third node V 3 Electrical connection, fifth switch M LS The first end of the fifth switch M is grounded. LS The second end and the first node V SW Electrical connection.

[0036] In an optional embodiment of the present invention, the first fixed voltage signal and the first control signal V VD2 same.

[0037] In an optional embodiment of the present invention, see Figure 5 , Figure 5 The main boost module in the multi-mode photovoltaic energy collection interface circuit provided by the embodiment of the present invention is a schematic diagram of the main boost module, the main boost module includes a maximum power point tracking module MPPT, a multiplexer MUX, a third voltage detector VD3, a sixth switch S 2 , the seventh switch MHS and zero current detection controller ZCD; wherein,

[0038] The input end of the maximum power point tracking module MPPT is electrically connected to the output end of the secondary oscillator OSC2, the output end of the maximum power point tracking module MPPT is electrically connected to the input end of the multiplexer MUX, the control end of the multiplexer MUX is electrically connected to the output end of the third voltage detector VD3, and the input end of the third voltage detector VD3 is electrically connected to the second node V 2 The output terminal of the multiplexer MUX is electrically connected to the third node V 3 Electrical connection; sixth switch S 2 The first end and the first node V SW Electrical connection, the sixth switch S 2 The second end of the seventh switch M HS The first end of the sixth switch S is electrically connected to 2 The control end of the seventh switch M receives the second fixed voltage signal. HS The second end and the second node V 2 Electrical connection, seventh switch M HS The control end of is electrically connected to the input end of the zero current detection controller ZCD, and the output end of the zero current detection controller ZCD is electrically connected to the third node V 3 Electrical connection.

[0039] In an optional embodiment of the present invention, the second fixed voltage signal and the second control signal V VD3 same.

[0040] In an optional embodiment of the present invention, the first switch M N1 is an NMOS transistor, the third switch M P1 is a PMOS transistor, the fifth switch M LS is an NMOS transistor, the seventh switch M HS It is a PMOS transistor.

[0041] Based on the same inventive concept, see Figure 6 , Figure 6 1 is a flow chart of a control method of a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention. The present invention also provides a control method of a multi-mode photoelectric energy collection interface circuit, which is used to control the multi-mode photoelectric energy collection interface circuit provided by the above embodiment of the present invention. The embodiment of the circuit is referred to above and will not be described in detail here. The control method includes:

[0042] S101, obtaining a pulse signal;

[0043] S102, generating an output voltage V according to the pulse signal OUT, and the inductor L is charged and discharged so that the output voltage V OUT Gradually increases; when the output voltage V OUT When it is greater than the first threshold, a first control signal V is generated. VD2 , the first control signal V VD2 Used to increase the speed of collecting photoelectric energy;

[0044] S103, when the output voltage V OUT When it is greater than the second threshold, a second control signal V is generated. VD3 According to the second control signal V VD3 , the output voltage V OUT Gradually increase.

[0045] In an optional embodiment of the present invention, obtaining a pulse signal includes:

[0046] A pulse signal is generated by a cold start module; the cold start module includes a start oscillator OSC1, a start charge pump CP, a first voltage detector VD1 and a delay unit Delay; wherein,

[0047] The charge pump CP starts up the input voltage under the drive of the start-up oscillator OSC1 and outputs a first voltage V CP , when the first voltage V CP When the voltage V CP Output second voltage V VD1 The delay unit Delay responds to the second voltage V VD1 Output delayed second voltage V ST , the second voltage V VD1 and the delayed second voltage V ST are both high level voltages, starting the charge pump CP to respond to the delayed second voltage V ST Close, so that the delayed second voltage V ST After a period of time Δt, it changes to a low-level voltage and generates a pulse signal.

[0048] In an optional embodiment of the present invention, an output voltage V is generated according to the pulse signal. OUT , and the inductor L is charged and discharged so that the output voltage V OUT Gradually increases; when the output voltage V OUT When it is greater than the first threshold, a first control signal V is generated. VD2 , the first control signal V VD2 Controlling the rate at which photovoltaic energy is collected, including:

[0049] The first control signal V is generated by the auxiliary boost module VD2The auxiliary boost module includes an inductor L, a first switch M N1 , the second switch S 1 , the third switch M P1 , capacitor C OUT , a second voltage detector VD2, a fourth switch S 3 , the secondary oscillator OSC2 and the fifth switch M LS ;in,

[0050] The first switch M N1 The first switch M is turned on in response to the high level voltage of the pulse signal to charge the inductor L; N1 In response to the low level voltage of the pulse signal, the inductor L is turned off to discharge;

[0051] In the second switch S 1 The control terminal of the second switch S is input with a first fixed voltage signal to turn on the second switch S 1 , the first node V SW The energy of the inductor L overshoots and turns on the third switch M P1 , to output the output voltage V OUT , and the output voltage V OUT The power is stored in capacitor C OUT ;

[0052] The inductor L is charged and discharged cyclically, so that the output voltage V OUT Gradually increases; when the output voltage V OUT When the output voltage V OUT Output the first control signal V VD2 , the first control signal V VD2 Input to the fourth switch S 3 The control terminal of the fourth switch S 3 , the secondary oscillator OSC2 responds to the output voltage V OUT The multiplexer MUX generates a first switching frequency signal V in response to the clock signal VOSC2. MUX , the first switching frequency signal V MUX Input to the fifth switch M LS The control terminal of the fifth switch M is turned on. LS , so that the energy of the inductor L passes through the fifth switch M LS Transmitted to the first node V SW ;

[0053] At the same time, the startup charge pump CP in the cold start module responds to the first control signal V VD2 closure.

[0054] In an optional embodiment of the present invention, when the output voltage VOUT When it is greater than the second threshold, a second control signal V is generated. VD3 According to the second control signal V VD3 , the output voltage V OUT Gradually increase in size and include:

[0055] The second control signal V is generated by the main boost module VD3 The main boost module includes a maximum power point tracking module MPPT, a multiplexer MUX, a third voltage detector VD3, a sixth switch S 2 , the seventh switch M HS and zero current detection controller ZCD; wherein,

[0056] When the output voltage V OUT When the output voltage V OUT Output the second control signal V VD3 ;

[0057] The maximum power point tracking module MPPT outputs a third control signal V in response to the clock signal VOSC2. mppt , the multiplexer MUX responds to the second control signal V VD3 The output of the multiplexer MUX is selected according to the third control signal V mppt Output a second switching frequency signal, the second switching frequency signal is input to the fifth switch M LS The control terminal of the fifth switch M is turned on. LS ; The first switching frequency signal V MUX The frequency is greater than the frequency of the second switching frequency signal;

[0058] The sixth switch S 2 The control terminal of the switch S is input with a second fixed voltage signal to turn on the sixth switch S 2 ;

[0059] The zero current detection controller ZCD generates a signal for turning on the seventh switch M in response to the second switching frequency signal. HS The signal is used to turn on the seventh switch M HS , so that the energy of the inductor L passes through the seventh switch M HS Transmitted to the second node V 2 .

[0060] In an optional embodiment of the present invention, see Figure 7 , Figure 7 This is a timing diagram of a control method of a multi-mode photoelectric energy collection interface circuit provided by an embodiment of the present invention, which realizes rapid collection of photoelectric energy through the following process, specifically:

[0061] S101. Generate a pulse signal.

[0062] Specifically, the cross-coupled linear startup charge pump CP driven by the low-voltage ring startup oscillator OSC1 is used to generate a voltage V IN To boost the voltage, when the charge pump CP is started, the first voltage V CP When the voltage V output by the first voltage detector VD1 increases to 600mV, VD1 and the delayed second voltage V output by the delay unit Delay ST becomes a high level, and the high level signal turns off the start oscillator OSC1, making the delayed second voltage V ST After a period of time Δt, it becomes a low level signal; the start oscillator OSC1 and the start charge pump CP are activated again, so that the second voltage V VD1 and the delayed second voltage V ST becomes a high level signal, and this operation will generate a pulse signal V ST , this signal will turn on the first switch M in the auxiliary boost mode N1 .

[0063] S102, generating an output voltage V according to the pulse signal OUT , and the inductor L is charged and discharged so that the output voltage V OUT Gradually increases; when the output voltage V OUT When it is greater than the first threshold, a first control signal V is generated. VD2 , the first control signal V VD2 Control the collection speed of photoelectric energy to increase the speed of photoelectric energy collection.

[0064] Specifically, through the pulse signal V ST Turn on the first switch M N1 To charge the inductor L, the pulse signal V ST The falling edge of the first node V SW The energy overshoot of the inductor L at the second switch S 1 The third switch M connected P1 conducts, thereby transferring power to the energy storage capacitor C OUT , this process belongs to asynchronous operation mode. When the output voltage V OUT When the voltage increases to more than 600mV, the second voltage detector VD2 outputs the first control signal V VD2 , the first control signal V VD2 The fourth switch S 3 , so that the secondary oscillator OSC2 can generate a higher clock signal V osc2 , to continue the operation of the boost converter. At this time, the wider fifth switch M LS and a higher first switching frequency signal V MUXThe energy of the inductor L is transmitted, which accelerates the overall energy accumulation process. At the same time, the first control signal V VD2 The startup oscillator OSC1 in the cold start module will be turned off, and the startup charge pump CP will be further turned off to avoid unnecessary power consumption.

[0065] S103, when the output voltage V OUT When it is greater than the second threshold, a second control signal V is generated. VD3 According to the second control signal V VD3 , the output voltage V OUT Gradually increase.

[0066] Specifically, when the output voltage V OUT When the voltage increases to above 1.0V, the third voltage detector VD3 generates a second control signal V VD3 , used to switch the output of the multiplexer MUX and convert the third control signal V mppt Connected to the fifth switch M LS The gate and zero current detection controller ZCD, where the third control signal V mppt From the proposed maximum power point tracking MPPT module for input tracking. At the same time, the third switch M P1 is closed, and the seventh switch M HS Turned on by the third control signal Vmppt, the boost converter operates in a high-efficiency synchronous mode to provide control power and output power.

[0067] like Figure 7 As shown, in the cold-startup phase, the input signal V IN In response, the delayed second voltage V ST is a pulse signal, the output signal V OUT gradually increases; in the auxiliary boost stage, according to the first control signal V VD2 Driven by, a first switching frequency signal V with a higher frequency is generated MUX ; In the main boost stage, the second control signal V VD3 Driven by the first switching frequency signal V MUX The second switching frequency signal V MUX ;Depend on Figure 6 The output voltage V OUT The slope of the three-stage output voltage V OUT The slope increases successively, which can achieve rapid collection of photoelectric energy.

[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant is intended to cover non-exclusive inclusion, so that the article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or device including the elements. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The orientation or position relationship indicated by "up", "down", "left", "right", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0070] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A multi-mode photoelectric energy harvesting interface circuit, characterized in that: include: A cold start module for generating a pulse signal; an auxiliary boost module, electrically connected to the cold start module, generating an output voltage in response to the pulse signal, and charging and discharging the inductor in the auxiliary boost module so that the output voltage is greater than a first threshold, and generating a first control signal, wherein the first control signal is used to increase the speed of photoelectric energy collection, and the first control signal is also used to control the cold start module to be turned off; The main boost module is electrically connected to the auxiliary boost module, generates a second control signal when the output voltage is greater than a second threshold, and responds to the second control signal to stably increase the output voltage.

2. The multi-mode photoelectric energy harvesting interface circuit according to claim 1, characterized in that: The cold start module includes a start oscillator, a start charge pump, a first voltage detector and a delay unit; wherein, An input end of the start-up oscillator receives an input voltage, an output end of the start-up oscillator is electrically connected to one input end of the start-up charge pump, another input end of the start-up charge pump receives the input voltage, an output end of the start-up charge pump is electrically connected to an input end of the first voltage detector, an output end of the first voltage detector is electrically connected to an input end of the delay unit, an output end of the delay unit is electrically connected to the auxiliary boost module, and another output end of the delay unit is electrically connected to the input end of the start-up oscillator.

3. The multi-mode optoelectronic energy harvesting interface circuit according to claim 1, characterized in that: The auxiliary boost module includes a first switch, a second switch, a third switch, a capacitor, a second voltage detector, a fourth switch, a secondary oscillator and a fifth switch; wherein, The control end of the first switch is electrically connected to the output end of the delay unit, the first end of the first switch is grounded, the second end of the first switch is electrically connected to a first node, one end of the inductor is electrically connected to the first node, the other end of the inductor receives an input voltage, the control end of the second switch receives a first fixed voltage signal, the first end of the second switch is electrically connected to the first node, the second end of the second switch is electrically connected to the first end of the third switch, the second end of the third switch is electrically connected to a second node, the control end of the third switch is electrically connected to the second node, the second node is electrically connected to the output end for outputting the output voltage, the first plate of the capacitor is electrically connected to the output end, the second plate of the capacitor is grounded, and the power of the output voltage is stored in the capacitor; An input terminal of the second voltage detector is electrically connected to the second node, an output terminal of the second voltage detector is electrically connected to a control terminal of the fourth switch, a first terminal of the fourth switch is electrically connected to the second node, a second terminal of the fourth switch is electrically connected to an input terminal of the secondary oscillator, an output terminal of the secondary oscillator is electrically connected to a third node through a multiplexer, a control terminal of the fifth switch is electrically connected to the third node, a first terminal of the fifth switch is grounded, and a second terminal of the fifth switch is electrically connected to the first node.

4. The multi-mode photoelectric energy collection interface circuit according to claim 3, characterized in that: The first fixed voltage signal is the same as the first control signal.

5. The multi-mode optoelectronic energy harvesting interface circuit according to claim 1, characterized in that: The main boost module includes a maximum power point tracking module, a multiplexer, a third voltage detector, a sixth switch, a seventh switch and a zero current detection controller; wherein, The input end of the maximum power point tracking module is electrically connected to the output end of the secondary oscillator, the output end of the maximum power point tracking module is electrically connected to the input end of the multiplexer, the control end of the multiplexer is electrically connected to the output end of the third voltage detector, the input end of the third voltage detector is electrically connected to the second node, and the output end of the multiplexer is electrically connected to the third node; the first end of the sixth switch is electrically connected to the first node, the second end of the sixth switch is electrically connected to the first end of the seventh switch, the control end of the sixth switch receives a second fixed voltage signal, the second end of the seventh switch is electrically connected to the second node, the control end of the seventh switch is electrically connected to the input end of the zero current detection controller, and the output end of the zero current detection controller is electrically connected to the third node.

6. The multi-mode optoelectronic energy harvesting interface circuit according to claim 5, characterized in that: The second fixed voltage signal is the same as the second control signal.

7. A control method for a multi-mode photoelectric energy collection interface circuit, used to control the multi-mode photoelectric energy collection interface circuit according to any one of claims 1 to 6, characterized in that: include: Obtain pulse signal; According to the pulse signal, an output voltage is generated, and the output voltage is gradually increased in an inductive charging and discharging manner; when the output voltage is greater than a first threshold, a first control signal is generated, and the first control signal is used to increase the collection speed of photoelectric energy; When the output voltage is greater than a second threshold, generating a second control signal; According to the second control signal, the output voltage is gradually increased under a wide input range.

8. The control method of the multi-mode photoelectric energy collection interface circuit according to claim 7, characterized in that: Get pulse signals, including: The pulse signal is generated by a cold start module; the cold start module includes a start oscillator, a start charge pump, a first voltage detector and a delay unit; wherein, After the startup charge pump boosts the input voltage under the drive of the startup oscillator, it outputs a first voltage. When the first voltage increases to be greater than or equal to a third threshold, the first voltage detector outputs a second voltage in response to the first voltage, and the delay unit outputs a delayed second voltage in response to the second voltage. The second voltage and the delayed second voltage are both high-level voltages. The startup charge pump is turned off in response to the delayed second voltage, so that the delayed second voltage is converted into a low-level voltage after a time Δt, thereby generating a pulse signal.

9. The control method of the multi-mode photoelectric energy collection interface circuit according to claim 7, characterized in that: According to the pulse signal, an output voltage is generated, and the output voltage is gradually increased in an inductive charging and discharging manner; when the output voltage is greater than a first threshold, a first control signal is generated, and the first control signal controls the collection speed of photoelectric energy, including: The first control signal is generated by the auxiliary boost module; the auxiliary boost module includes an inductor, a first switch, a second switch, a third switch, a capacitor, a second voltage detector, a fourth switch, a secondary oscillator and a fifth switch; wherein, The first switch is turned on in response to a high level voltage of the pulse signal to charge the inductor; the first switch is turned off in response to a low level voltage of the pulse signal to discharge the inductor; A first fixed voltage signal is inputted to the control terminal of the second switch to turn on the second switch, and the inductor energy of the first node overshoots to turn on the third switch to output the output voltage, and the power of the output voltage is stored in the capacitor; The inductor performs cyclic charging and discharging, so that the output voltage gradually increases; when the output voltage is greater than a first threshold, the second voltage detector outputs a first control signal in response to the output voltage, the first control signal is input to the control end of the fourth switch to turn on the fourth switch, the secondary oscillator generates a clock signal in response to the output voltage, the multiplexer generates a first switching frequency signal in response to the clock signal, the first switching frequency signal is input to the control end of the fifth switch to turn on the fifth switch, so that the inductor energy is transmitted to the first node through the fifth switch; At the same time, a startup charge pump in the cold start module is turned off in response to the first control signal.

10. The control method of the multi-mode photoelectric energy collection interface circuit according to claim 7, characterized in that: When the output voltage is greater than a second threshold, generating a second control signal; According to the second control signal, gradually increasing the output voltage under a wide input range, comprising: The second control signal is generated by a main boost module; the main boost module includes a maximum power point tracking module, a multiplexer, a third voltage detector, a sixth switch, a seventh switch and a zero current detection controller; wherein, When the output voltage is greater than a second threshold, the third voltage detector outputs a second control signal in response to the output voltage; The maximum power point tracking module outputs a third control signal in response to the clock signal, the multiplexer selects the output of the multiplexer in response to the second control signal, outputs a second switching frequency signal according to the third control signal, and the second switching frequency signal is input to the control end of the fifth switch to turn on the fifth switch; the frequency of the first switching frequency signal is greater than the frequency of the second switching frequency signal; A second fixed voltage signal is inputted into the control end of the sixth switch to turn on the sixth switch; The zero current detection controller generates a signal for turning on the seventh switch in response to the second switching frequency signal, so as to turn on the seventh switch, so that the inductor energy is transferred to the second node through the seventh switch.

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