WO2021217454A1

WO2021217454A1 - Voltage bootstrap chip, low-light collection circuit and device, and control methods therefor

Info

Publication number: WO2021217454A1
Application number: PCT/CN2020/087596
Authority: WO
Inventors: 武文静
Original assignee: 武文静
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2021-11-04
Also published as: CN111699606B; CN111699606A

Abstract

A voltage bootstrap chip (01), a low-light collection circuit and device, and control methods therefor. A first voltage is generated by means of a first light energy collection assembly (02) according to received light energy; both a first energy storage assembly (03) and a second energy storage assembly (04) perform charging according to the first voltage; a second switch assembly (012) cuts off the connection between a power ground and the first energy storage assembly (03) according to a second control signal; a first switch assembly (011) is communicated with a positive electrode of the first light energy collection assembly (02) and a first end of the first energy storage assembly (03) according to a first control signal so that a second end of the first energy storage assembly (03) generates a first voltage-multiplying voltage; a first field-effect transistor (M1) is communicated with a work power supply end (VDD) and a first voltage output end (P1.0) of the voltage bootstrap chip (01) according to a third control signal so that the first light energy collection assembly (02), the first energy storage assembly (03), and the second energy storage assembly (04) are sequentially connected in series to charge a first battery (06). The voltage bootstrap chip (01), the low-light collection circuit and device, and the control methods therefor reduce a threshold of low energy collection, and improve the energy collection efficiency and a power supply voltage of the voltage bootstrap chip (01).

Description

Voltage bootstrap chip, weak light collection circuit, equipment and control method thereof

Technical field

This application belongs to the field of weak energy harvesting, and in particular relates to a voltage bootstrap chip, a weak light harvesting circuit, equipment and a control method thereof.

Background technique

In the field of weak energy harvesting, the energy harvesting efficiency is very low. Taking the low-light harvesting circuit as an example, the light board cannot reach the ideal design voltage in the case of insufficient light, and cannot charge the high-voltage battery, which is equivalent to a waste of less than The energy provided by the light plate of the battery voltage section.

Therefore, the aforementioned low-light collection circuit has the defects that it cannot collect energy lower than the battery voltage, resulting in a high threshold for weak energy collection and low energy collection efficiency.

Summary of the invention

technical problem

This application provides a voltage bootstrap chip, a low light collection circuit, a device and a control method thereof, and aims to solve the problems of high threshold value of weak energy collection and low energy collection efficiency in the prior art.

The solution to the problem

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

This application is realized in this way, a voltage bootstrap chip, which is connected with the first light energy collection component, the first energy storage component, the second energy storage component, the third energy storage component, and the first battery; the voltage The bootstrap chip includes a first switch component, a second switch component, a first one-way conduction component, a second one-way conduction component, a third one-way conduction component, a fourth one-way conduction component, a first field effect tube, and a second one-way conduction component. Field effect tube

The control terminal of the first switch component is the first control terminal of the voltage bootstrap chip, the control terminal of the second switch component is the second control terminal of the voltage bootstrap chip, and the first field effect The grid of the tube and the grid of the second field effect transistor together constitute the third control terminal of the voltage bootstrap chip, the positive electrode of the first unidirectional conducting component and the positive electrode of the third unidirectional conducting component And the first input and output terminal of the first switch assembly together constitute the input power terminal of the voltage bootstrap chip, the second input and output terminal of the first switch assembly and the first input and output terminal of the second switch assembly The first capacitor terminal of the voltage bootstrap chip is formed together, and the negative electrode of the first unidirectional conductive component and the positive electrode of the second unidirectional conductive component together constitute the second capacitor terminal of the voltage bootstrap chip, The negative electrode of the second unidirectional conduction component and the drain of the first field effect transistor jointly constitute the working power terminal of the voltage bootstrap chip, and the source of the first field effect transistor and the second field effect transistor The source of the effect tube jointly constitutes the first voltage output terminal of the voltage bootstrap chip, and the negative pole of the third unidirectional conducting component and the positive pole of the fourth unidirectional conducting component together constitute the voltage bootstrap chip The third capacitor terminal, the negative electrode of the fourth unidirectional conduction component is the output terminal of the voltage bootstrap chip, and the second input and output terminal of the second switch component and the drain of the second field effect transistor are common Constitute the ground terminal of the voltage bootstrap chip;

The anode of the first light energy harvesting component is connected to the input power terminal of the voltage bootstrap chip, the first end of the first energy storage component is connected to the first capacitor terminal of the voltage bootstrap chip, and the The second end of the first energy storage component is connected to the second capacitor end of the voltage bootstrap chip, and the first end of the second energy storage component is connected to the third capacitor end of the voltage bootstrap chip. The positive electrode of the first battery is connected to the output terminal of the voltage bootstrap chip, the second terminal of the second energy storage component is connected to the first voltage output terminal of the voltage bootstrap chip, and the third energy storage component The first terminal of the voltage bootstrap chip is connected to the working power terminal, the negative electrode of the first light energy harvesting component, the ground terminal of the voltage bootstrap chip, and the negative electrode of the first battery are connected to the power ground ；

The first light energy collection component is configured to generate a first voltage according to the received light energy; the first unidirectional conduction component and the third unidirectional conduction component are both configured to unidirectionally conduct the first voltage; The first energy storage component and the second energy storage component are both configured to charge according to the first voltage; the second switch component is configured to turn off the power ground and the first energy storage component according to a second control signal The connection of the component; the first switch component is configured to connect the positive electrode of the first light energy collection component and the first end of the first energy storage component according to a first control signal so that the first energy storage component The second terminal generates a first voltage doubling voltage; the second unidirectional conduction component is configured to unidirectionally conduct the first voltage or the first voltage doubling voltage, and the third energy storage component is configured to conduct according to the first voltage The voltage is doubled for charging and a second voltage is generated to supply power to the voltage bootstrap chip. The first field effect transistor connects the working power terminal of the voltage bootstrap chip to the voltage bootstrap chip according to a third control signal. Lift the first voltage output terminal of the chip to connect the first light energy collection component, the first energy storage component, and the second energy storage component in series to connect the first battery through the fourth unidirectional conduction component. Charge it.

In one of the embodiments, the first switch component is a third field effect transistor, and the second switch component is a fourth field effect transistor.

In one of the embodiments, the first unidirectional conducting component is a first diode, the second unidirectional conducting component is a second diode, and the third unidirectional conducting component is a third diode Tube, the fourth unidirectional conducting component is a fourth diode.

An embodiment of the present application also provides a method for controlling a voltage bootstrap chip as described above, including:

Step A1: The input power terminal of the voltage bootstrap chip inputs the first voltage output by the first light energy collection component, and the first unidirectional conduction component and the second unidirectional conduction component are both unidirectionally conducted. The first voltage, the third energy storage component is charged according to the first voltage and generates the second voltage, and the voltage bootstrap chip works according to the second voltage;

Step A1: After the voltage bootstrap chip works, the first switch component is controlled by the first control terminal of the voltage bootstrap chip to turn off the first energy storage component and the first light energy collection component. Connected, the second switch component is controlled to be turned on through the second control terminal of the voltage bootstrap chip so that the first terminal of the first energy storage component is connected to the power ground; the first energy storage component is based on the The first voltage turned on by the first unidirectional conduction component is charged and the first charging voltage is generated; the third control terminal of the voltage bootstrap chip is controlled to be a low level to make the second energy storage component according to the first Two unidirectional conducting components charge the first voltage unidirectionally conducting and generate a second charging voltage;

Step A3: Input a second control signal through the second control terminal of the voltage bootstrap chip to control the second switch component to turn off, so that the first terminal of the first energy storage component is disconnected from the power ground; The first control terminal of the voltage bootstrap chip is controlled to input a first control signal, so that the potential of the first terminal of the first energy storage component is equal to the potential of the anode of the first light energy collection component, and the first storage component The first multiplier voltage at the second terminal of the energy component is the sum of the first voltage and the first charging voltage; the third control terminal of the voltage bootstrap chip is controlled to input a third control signal, so that the second The potential of the second terminal of the energy storage component is equal to the potential of the working power terminal of the voltage bootstrap chip, and the potential of the second terminal of the second energy storage component is equal to the potential of the first terminal of the first energy storage component, so that the The second multiplier voltage of the first terminal of the second energy storage component is equal to the sum of the first voltage, the first charging voltage, and the second charging voltage, and the third control signal is at a high level; The first terminal of the second energy storage component outputs the second doubled voltage to charge the first battery through the fourth unidirectional conduction component.

The embodiment of the present application also provides a low-light collection device, which is connected to the first battery and includes a first light energy collection component, a first energy storage component, a second energy storage component, a third energy storage component, and the above-mentioned voltage automatic Give the chip.

The embodiment of the application also provides a low-light collection circuit, which is connected to the first battery, and includes a microprocessor, a first switch component, a second switch component, a first light energy collection component, a first energy storage component, and a second storage device. Energy component, third energy storage component, first one-way communication component, second one-way communication component, third one-way communication component, and fourth one-way communication component;

The first light energy collection component is configured to generate a first voltage according to the received light energy;

The first unidirectional conduction component is connected to the first light energy collection component and configured to conduct the first voltage unidirectionally;

The third unidirectional conduction component is connected to the first light energy collection component and configured to conduct the first voltage unidirectionally;

The second unidirectional conduction component is connected to the first unidirectional conduction component and is configured to unidirectionally conduct the first voltage or the first voltage doubler;

The first energy storage component is connected to the first unidirectional conduction component and is configured to charge according to the first voltage;

The second energy storage component is connected to the third unidirectional conduction component and is configured to charge according to the second voltage;

The third energy storage component is connected to the second unidirectional conduction component, and is configured to charge according to the first voltage or the first doubled voltage and generate a second voltage;

The first switch component is connected to the first light energy collection component, the first one-way conduction component, the third one-way conduction component, and the first energy storage component, and is configured to communicate according to a first control signal The first light energy collection component and the first energy storage component;

The second switch component is connected to the first energy storage component and the second switch component, and is configured to turn off the connection between the power ground and the first energy storage component according to a second control signal;

The microprocessor has a second voltage output terminal connected to the first switch component, a third voltage output terminal connected to the second switch component,

The input power terminal connected to the anode of the second unidirectional conduction component and the first terminal of the third energy storage component, the second terminal of the second switch component, and the first terminal of the third energy storage component The two terminals, the negative electrode of the first light energy collection component are commonly connected to the ground terminal of the power ground, and the first voltage output terminal connected to the second terminal of the second energy storage component, configured to be based on the second voltage Work to generate the first control signal and the second control signal so that the anode of the first light energy collection component is connected to the first end of the first energy storage component, and a third control signal is generated to enable all The second end of the second energy storage component is connected to the second end of the first energy storage component through the second unidirectional conduction component so that the first light energy collection component and the first energy storage component And the second energy storage component is connected in series to charge the first battery through the fourth unidirectional conduction component.

In one of the embodiments, the first light energy collection component is a first light energy board, the first energy storage component is a first capacitor, the second energy storage component is a second capacitor, and the third energy storage component is a second capacitor. The energy component is a third capacitor, the first one-way conducting component is a first diode, the second one-way conducting component is a second diode, and the third one-way conducting component is a third diode Tube, the fourth unidirectional conducting component is a fourth diode.

In one of the embodiments, the first switch component includes a third field effect transistor, and the second switch component includes a fourth field effect transistor.

An embodiment of the present application also provides a method for controlling a low light collection circuit as described above, which is characterized in that it includes:

Step B1: The input power terminal of the microprocessor inputs the first voltage output by the first light energy collection component, the third energy storage component is charged according to the first voltage and generates a second voltage, the The microprocessor works according to the second voltage;

Step B2: After the microprocessor works, the first switch component is controlled to turn off the connection between the first energy storage component and the first light energy collection component through the second voltage output terminal of the microprocessor , Controlling the conduction of the second switch component through the third voltage output terminal of the microprocessor so that the first terminal of the first energy storage component is connected to the power ground; A first voltage conducted by a unidirectional conduction component is charged and generates a first charging voltage; the first voltage output terminal of the microprocessor is controlled to be a low level to make the second energy storage component according to the third Charging the first voltage unidirectionally conducted by the unidirectional conduction component and generating a second charging voltage;

Step B3: output a second control signal through the third voltage output terminal of the microprocessor to control the second switch component to turn off, so that the first terminal of the first energy storage component is disconnected from the power ground; The second voltage output terminal of the microprocessor is controlled to output the first control signal so that the potential of the first terminal of the first energy storage component is equal to the potential of the anode of the first light energy collection component, and the first energy storage component The first voltage doubled at the second terminal of the energy component is the sum of the first voltage and the first charging voltage; the first voltage output terminal of the microprocessor is controlled to input a third control signal, so that the second The potential of the second terminal of the energy storage component is equal to the potential of the input power terminal of the microprocessor, and the potential of the second terminal of the second energy storage component is equal to the potential of the second terminal of the first energy storage component, so that the second The second doubled voltage of the first terminal of the energy storage component is equal to the sum of the first voltage, the first charging voltage, and the second charging voltage; the second voltage of the first terminal of the second energy storage component is The second voltage doubling charges the first battery through the fourth unidirectional conduction component.

The beneficial effects of the invention

Beneficial effect

The beneficial effects brought about by the technical solution provided in this application are: as can be seen from the above application, due to the combination of the first light energy collection component, the first energy storage component, the second energy storage component, the third energy storage component, and the first battery Connection; the voltage bootstrap chip includes a first switch component, a second switch component, a first one-way conduction component, a second one-way conduction component, a third one-way conduction component, a first field effect tube and a second field effect Tube; the first light energy collection component generates a first voltage according to the received light energy; the first unidirectional conduction component and the third unidirectional conduction component both unidirectionally conduct the first voltage; the first energy storage component and the second energy storage component Both are charged according to the first voltage; the second switch component turns off the connection between the power ground and the first energy storage component according to the second control signal; the first switch component connects to the first light energy collection component according to the first control signal The positive electrode of the first energy storage component and the first end of the first energy storage component so that the second end of the first energy storage component generates a first voltage doubler; the second unidirectional conduction component unidirectionally conducts the first voltage or the first voltage doubler , The third energy storage component is charged according to the first multiplier voltage and generates a second voltage to supply power to the voltage bootstrap chip, and the first field effect transistor connects the working power terminal of the voltage bootstrap chip to the voltage bootstrap chip according to the third control signal Lift the first voltage output terminal of the chip to connect the first light energy collection component, the first energy storage component, and the second energy storage component in series to charge the first battery through the fourth unidirectional conduction component; The collection component, the first energy storage component, and the second energy storage component are connected in series to achieve a three-fold voltage-doubling bootstrapping, which reduces the threshold of weak energy harvesting and improves energy harvesting efficiency; and is loaded on the microprocessor The first doubled voltage is the doubled bootstrap voltage formed by the series connection of the first light energy harvesting component and the first energy storage component, which increases the power supply voltage of the voltage bootstrap chip and reduces the voltage bootstrap chip the cost of.

Brief description of the drawings

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a module structure diagram of a voltage bootstrap chip provided by an embodiment of the application;

2 is a schematic diagram of a circuit structure of a voltage bootstrap chip provided by an embodiment of the application;

FIG. 3 is a block diagram of a module of the low-light collection device provided by an embodiment of the application;

FIG. 4 is a circuit structure diagram of an example of a low-light collection device provided by an embodiment of the application;

FIG. 5 is a block diagram of a module of a low light collection circuit provided by an embodiment of the application;

FIG. 6 is a circuit structure diagram of an example of a low light collection circuit provided by an embodiment of the application.

Invention embodiment

Embodiments of the present invention

In order to make the purpose, technical solutions, and advantages of this application clearer and clearer, the following further describes the application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

FIG. 1 shows the module structure of the voltage bootstrap chip 01 of the low-light collection device provided by the embodiment of the present application. For ease of description, only the parts related to the embodiment of the present application are shown, and the details are as follows:

A voltage bootstrap chip 01, which is connected to the first light energy collection component 02, the first energy storage component 03, the second energy storage component 04, the third energy storage component 05, and the first battery 06; the voltage bootstrap chip 01 includes a first switch component 011, a second switch component 012, a first one-way conduction component 013, a second one-way conduction component 014, a third one-way conduction component 015, a fourth one-way conduction component 016, and a first field effect Tube M1 and the second field effect tube M2.

Among them, the control terminal of the first switch component 011 is the first control terminal of the voltage bootstrap chip 01, the control terminal of the second switch component 012 is the second control terminal of the voltage bootstrap chip 01, and the gate of the first field effect transistor M1 The pole and the gate of the second field effect transistor M2 together constitute the third control terminal of the voltage bootstrap chip 01, the positive pole of the first unidirectional conducting component 013, the positive pole of the third unidirectional conducting component 015, and the first switching component 011. The first input and output terminals together constitute the input power terminal VCC of the voltage bootstrap chip 01, and the second input and output terminals of the first switch component 011 and the first input and output terminals of the second switch component 012 together constitute the first input and output terminals of the voltage bootstrap chip 01. A capacitor terminal PC1, the negative pole of the first unidirectional conducting component 013 and the positive pole of the second unidirectional conducting component 014 together constitute the second capacitor terminal PC2 of the voltage bootstrap chip 01, the negative pole of the second unidirectional conducting component 014 and the first The drain of the FET M1 together constitutes the working power terminal VDD of the voltage bootstrap chip 01, and the source of the first FET M1 and the source of the second FET M2 together constitute the first voltage of the voltage bootstrap chip 01 The output terminal P1.0, the negative pole of the third unidirectional conducting component 015 and the positive pole of the fourth unidirectional conducting component 016 together constitute the third capacitor terminal PC3 of the voltage bootstrap chip, and the fourth unidirectional conducting component 016 The negative electrode is the output terminal OUT of the voltage bootstrap chip 01, and the second input and output terminals of the second switch component 012 and the drain of the second field effect transistor M2 together form the ground terminal GND of the voltage bootstrap chip 01.

Wherein, the anode of the first light energy collection component 02 is connected to the input power terminal VCC of the voltage bootstrap chip 01, the first end of the first energy storage component 03 is connected to the first capacitor terminal PC1 of the voltage bootstrap chip 01, and the first The second end of the energy storage component 03 is connected to the second capacitor terminal PC2 of the voltage bootstrap chip 01, and the first end of the second energy storage component 04 is connected to the third capacitor terminal PC3 of the voltage bootstrap chip. The positive electrode is connected to the output terminal OUT of the voltage bootstrap chip 01, the second end of the second energy storage component 04 is connected to the first voltage output terminal P1.0 of the voltage bootstrap chip 01, and the first end of the third energy storage component 05 Connected to the working power terminal VDD of the voltage bootstrap chip 01, the negative electrode of the first light energy collection component 02, the ground terminal GND of the voltage bootstrap chip 01, and the negative electrode of the first battery 06 are all connected to the power ground.

The first light energy collection component 02 is configured to generate a first voltage according to the received light energy; the first unidirectional conduction component 013 and the third unidirectional conduction component 015 are both configured to conduct a unidirectional first voltage; the first energy storage component 03 And the second energy storage component 04 are both configured to charge according to the first voltage; the second switch component is configured to turn off the connection between the power ground and the first energy storage component 03 according to the second control signal; the first switch component 011 is configured to charge according to The first control signal connects the positive electrode of the first light energy collection component 02 and the first end of the first energy storage component 03 so that the second end of the first energy storage component 03 generates the first voltage doubler; the second unidirectional conduction component 014 is configured to unidirectionally conduct the first voltage or the first doubled voltage, and the third energy storage component 05 is configured to charge according to the first doubled voltage and generate a second voltage to supply power to the voltage bootstrap chip 01, the first field The effect tube M1 connects the working power terminal VDD of the voltage bootstrap chip 01 and the first voltage output terminal P1.0 of the voltage bootstrap chip 01 according to the third control signal to enable the first light energy collection component 02 and the first energy storage component 03 And the second energy storage component 04 is connected in series to charge the first battery 06 through the fourth unidirectional conduction component 016.

When three energy storage components are superimposed and connected in series, there will be positive and negative spikes affecting each other. By using the third energy storage component to supply power to the voltage bootstrap chip 01, the voltage bootstrap chip 01 is prevented from suddenly dropping in the power supply voltage at the moment of bootstrapping.

The low-level spikes at the moment of the bootstrapping of the first energy storage component are isolated by the first unidirectional conduction component, which avoids the reset of the voltage bootstrap chip.

Specifically, as shown in FIG. 2, the first switch component 011 is a third field effect transistor M3, and the second switch component 012 is a fourth field effect transistor M4. The first unidirectional conducting component 013 is the first diode D1, the second unidirectional conducting component 014 is the second diode D2, the third unidirectional conducting component 015 is the third diode D3, and the fourth unidirectional conducting component 015 is the third diode D3. The component 016 is the fourth diode D4.

Specifically, the third field effect tube M3 is an enhanced field effect tube, the fourth field effect tube M4 is a depletion field effect tube, and the second field effect tube M2 is an enhanced field effect tube. When the voltage bootstrap chip 01 is not working, the first switch component 011 and the second field effect transistor M2 are in the on state, and the second switch component 012 is in the off state.

Since the control signal is output by the microprocessor core of the voltage bootstrap chip 01, the second voltage is the operating voltage of the microprocessor core of the voltage bootstrap chip 01, and the voltage bootstrap chip 01 can use the first light energy collection component after working The voltage that is twice the first voltage output by 02 is used as the working voltage. Most of the microprocessor cores on the market are in this voltage range, that is, 1.8V to 3.6V. If the first voltage is used as the operating voltage of the microprocessor core, the operating voltage of the microprocessor core will be compressed to only 1/3 of the voltage of the first battery during bootstrapping, which is about 0.9V, which adds to the microprocessor core Difficulty of selection.

The embodiment of the present application also provides a control method of the voltage bootstrap chip 01 as shown in FIG. 1, including:

Step A1: The input power terminal VCC of the voltage bootstrap chip 01 inputs the first voltage output by the first light energy collection component, the first unidirectional conduction component 013 and the second unidirectional conduction component 014 both unidirectionally conduct the first voltage, The three energy storage component 05 is charged according to the first voltage and generates a second voltage, and the voltage bootstrap chip 01 operates according to the second voltage.

Step A1: After the voltage bootstrap chip 01 works, the first switch component 011 is controlled by the first control terminal A of the voltage bootstrap chip 01 to turn off the connection between the first energy storage component 03 and the first light energy collection component 02, and the voltage The second control terminal B of the bootstrap chip 01 controls the second switch component 012 to be turned on so that the first terminal of the first energy storage component 03 is connected to the power ground; the first energy storage component 03 is turned on according to the first unidirectional conduction component 013 The first voltage is charged and the first charging voltage is generated; the third control terminal C of the control voltage bootstrap chip 01 is low to enable the second energy storage component 04 to conduct unidirectionally according to the second unidirectional conduction component 014 A voltage is charged and a second charging voltage is generated.

Step A3: Input a second control signal through the second control terminal B of the voltage bootstrap chip 01 to control the second switch component 012 to turn off, so that the first terminal of the first energy storage component 03 is disconnected from the power ground; control voltage The first control terminal A of the bootstrap chip 01 inputs the first control signal, so that the potential of the first terminal of the first energy storage component 03 is equal to the potential of the anode of the first light energy collection component 02, and the first energy storage component 03 The first doubled voltage at the two terminals is the sum of the first voltage and the first charging voltage; the third control terminal of the control voltage bootstrap chip 01 inputs the third control signal so that the potential of the second terminal of the second energy storage component 04 is equal to The potential of the voltage bootstrap chip 01’s working power supply terminal VDD, and the potential of the second terminal of the second energy storage component 04 is equal to the potential of the first terminal of the first energy storage component 03, so that the first terminal of the second energy storage component 04 The second multiplier voltage is equal to the sum of the first voltage, the first charging voltage and the second charging voltage. The third control signal is at a high level; The fourth unidirectional conduction component 016 charges the first battery 06.

Based on the aforementioned voltage bootstrap chip 01, an embodiment of the present application also provides a low-light collection device, as shown in FIG. 3, connected to the first battery 06, including a first light energy collection component 02 and a first energy storage component 03 , The second energy storage component 04, the third energy storage component 05, and the voltage bootstrap chip 01 as described above.

FIG. 4 shows an example circuit structure of a low-light collection device provided by an embodiment of the present application. For ease of description, only parts related to the embodiment of the present application are shown, which are described in detail as follows:

The first light energy collection component 02 includes a first light energy board Z1.

The first energy storage component 03 is a first capacitor C1, the second energy storage component 04 is a second capacitor C2, and the third energy storage component 05 is a third capacitor C3.

FIG. 5 shows the module structure of the low-light collection circuit provided by the embodiment of the present application. For ease of description, only the parts related to the embodiment of the present application are shown, which are described in detail as follows:

A low-light collection circuit, connected to the first battery 10, includes a microprocessor U1, a first switch component 11, a second switch component 12, a first light energy collection component 13, a first energy storage component 14, and a second storage device. The energy component 15, the third energy storage component 16, the first one-way communication component 17, the second one-way communication component 18, the third one-way communication component 19, and the fourth one-way communication component 20.

The first light energy collection component 13 is configured to generate a first voltage according to the received light energy.

The first unidirectional conduction component 17 is connected to the first light energy collection component 13 and is configured to conduct a unidirectional conduction of a first voltage.

The third unidirectional conduction component 19 is connected to the first light energy collection component 13 and is configured to unidirectionally conduct the first voltage.

The second unidirectional conduction component 18 is connected to the first unidirectional conduction component 17 and is configured to unidirectionally conduct a first voltage or a first voltage doubling voltage.

The first energy storage component 14 is connected to the first unidirectional conduction component 17 and is configured to charge according to the first voltage.

The second energy storage component 15 is connected to the third unidirectional conduction component 19 and is configured to charge according to the first voltage.

The third energy storage component 16 is connected to the second unidirectional conduction component 18, and is configured to charge according to the first voltage or the first doubled voltage and generate a second voltage.

The first switch component 11 is connected to the first light energy collection component 13, the first one-way conduction component 17, the third one-way conduction component 19, and the first energy storage component 14, and is configured to communicate with the first light energy collection component according to the first control signal. The energy collection component 13 and the first energy storage component 14.

The second switch component 12 is connected to the first energy storage component 14 and the second switch component 12 and is configured to shut off the connection between the power ground and the first energy storage component 14 according to the second control signal.

The microprocessor U1 has a second voltage output terminal P2.0 connected to the first switch component 11, a third voltage output terminal 3.0 connected to the second switch component 12, and the positive pole and the first pole of the second unidirectional conducting component 18 The input power terminal VCC connected to the first end of the three energy storage assembly 16 is connected to the second end of the second switch assembly 12, the second end of the third energy storage assembly 16, and the negative electrode of the first light energy collection assembly 13 in common. The ground terminal GND of the power ground and the first voltage output terminal P1.0 connected to the second terminal of the second energy storage component are configured to work according to the second voltage to generate the first control signal and the second control signal so that the first The anode of the light energy collection component 13 is connected to the first end of the first energy storage component 14, and a third control signal is generated so that the second end of the second energy storage component 15 is connected to the first energy storage component through the second unidirectional conducting component 18 The second end of the component 14 is connected so that the first light energy collection component 13, the first energy storage component 14 and the second energy storage component 15 are sequentially connected in series to charge the first battery 10 through the fourth unidirectional conducting component 20.

Specifically, the third field effect tube M3 is an enhanced field effect tube, and the fourth field effect tube M4 is a depletion field effect tube. When the voltage bootstrap chip 01 is not working, the first switch component 011 is in the on state, and the second switch component 012 is in the off state.

The second voltage is the working voltage of the microprocessor U1. After the microprocessor U1 works, it can use twice the voltage of the first voltage output by the first light energy collection component 02 as the working voltage. Most microprocessors on the market are In this voltage range, that is, 1.8V to 3.6V. If the first voltage is used as the working voltage of the microprocessor, the working voltage of the microprocessor will be compressed to only 1/3 of the voltage of the first battery during bootstrapping, about 0.9V, which increases the selection of the microprocessor Difficulty.

FIG. 6 shows an example circuit structure of the low light collection circuit provided by the embodiment of the present application, and FIG. 7 shows another example circuit structure of the low light collection circuit provided by the embodiment of the present application. For ease of description, only The parts related to the embodiments of the present application are shown, and the details are as follows:

The first light energy collection component 13 is the first light energy board Z1. The first energy storage component 14 is a first capacitor C1, the second energy storage component 15 is a second capacitor C2, the third energy storage component 16 is a third capacitor C3, and the first unidirectional conduction component 17 is a first diode D1 , The second unidirectional conducting component 18 is the second diode D2, the third unidirectional conducting component 19 is the third diode D3, and the fourth unidirectional conducting component is the fourth diode D4.

The first switch assembly 11 includes a third field effect transistor M3, and the second switch assembly 12 includes a fourth field effect transistor M4.

The embodiment of the present application also provides a control method of the low light collection circuit as shown in FIG. 5, including:

Step B1: The input power terminal VCC of the microprocessor U1 inputs the first voltage output by the first light energy collection component 13, the third energy storage component 16 charges according to the first voltage and generates a second voltage, and the microprocessor U1 according to the first voltage Two voltage work.

Step B2: After the microprocessor U1 works, the first switch component 11 is controlled to turn off the connection between the first energy storage component 14 and the first light energy collection component 13 through the second voltage output terminal P2.0 of the microprocessor U1, through The third voltage output terminal P3.0 of the microprocessor U1 controls the second switch component 12 to be turned on so that the first terminal of the first energy storage component 14 is connected to the power ground; the first energy storage component 14 is based on the first unidirectional conduction component 17 The turned-on first voltage is charged and the first charging voltage is generated; the first voltage output terminal P1.0 of the microprocessor U1 is controlled to be a low level to make the second energy storage component 15 according to the third unidirectional conduction component 19 The unidirectional first voltage is charged and the second charging voltage is generated.

Step B3: output a second control signal through the third voltage output terminal P3.0 of the microprocessor U1 to control the second switch component 12 to turn off, so that the first terminal of the first energy storage component is disconnected from the power ground; control The second voltage output terminal P2.0 of the microprocessor U1 outputs the first control signal, so that the potential of the first terminal of the first energy storage component 14 is equal to the potential of the anode of the first light energy collection component 13, and the first energy storage component The first multiplier voltage at the second terminal of the component 14 is the sum of the first voltage and the first charging voltage; the first voltage output terminal P1.0 of the control microprocessor U1 inputs a third control signal to enable the second energy storage component 15 The potential of the second terminal of the microprocessor U1 is equal to the potential of the input power terminal of the microprocessor U1, and the potential of the second terminal of the second energy storage component 15 is equal to the potential of the second terminal of the first energy storage component 14, so that the second terminal of the second energy storage component 15 The second doubled voltage at one end is equal to the sum of the first voltage, the first charging voltage, and the second charging voltage; the second doubled voltage at the first end of the second energy storage component 15 passes through the fourth unidirectional conducting component 20 The first battery 10 is charged.

In summary, the embodiment of the present application is connected to the first light energy collection component, the first energy storage component, the second energy storage component, the third energy storage component, and the first battery; the voltage bootstrap chip includes The first switch component, the second switch component, the first one-way conduction component, the second one-way conduction component, the third one-way conduction component, the first field effect tube and the second field effect tube; the first light energy collection component is based on The received light energy generates a first voltage; the first unidirectional conducting component and the third unidirectional conducting component both unidirectionally conducting the first voltage; both the first energy storage component and the second energy storage component are charged according to the first voltage The second switch component turns off the connection between the power source and the first energy storage component according to the second control signal; the first switch component connects the positive electrode of the first light energy collection component and the first energy storage component according to the first control signal The first terminal is used to make the second terminal of the first energy storage component generate a first voltage doubler; the second unidirectional conduction component unidirectionally conducts the first voltage or the first voltage doubler, and the third energy storage component is based on the first The voltage doubled voltage is charged and a second voltage is generated to supply power to the voltage bootstrap chip. The first field effect transistor connects the working power terminal of the voltage bootstrap chip to the first voltage output terminal of the voltage bootstrap chip according to the third control signal. The first light energy collection component, the first energy storage component, and the second energy storage component are sequentially connected in series to charge the first battery through the fourth unidirectional conductive component; through the first light energy collection component, the first energy storage component The components and the second energy storage component are connected in series to achieve a triple voltage doubler bootstrap, which reduces the threshold of weak energy harvesting and improves energy harvesting efficiency; and the first doubler voltage loaded on the microprocessor is the first The double voltage bootstrap voltage formed by the light energy harvesting component and the first energy storage component in series increases the power supply voltage of the voltage bootstrap chip and reduces the cost of the voltage bootstrap chip.

The above descriptions are only the preferred embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A voltage bootstrap chip, characterized in that it is connected with a first light energy collection component, a first energy storage component, a second energy storage component, a third energy storage component, and a first battery;

The voltage bootstrap chip includes a first switch component, a second switch component, a first one-way conduction component, a second one-way conduction component, a third one-way conduction component, a fourth one-way conduction component, and a first field effect transistor And the second field effect tube;

The control terminal of the first switch component is the first control terminal of the voltage bootstrap chip, the control terminal of the second switch component is the second control terminal of the voltage bootstrap chip, and the first field effect The grid of the tube and the grid of the second field effect transistor together constitute the third control terminal of the voltage bootstrap chip, the positive electrode of the first unidirectional conducting component and the positive electrode of the third unidirectional conducting component And the first input and output terminal of the first switch assembly together constitute the input power terminal of the voltage bootstrap chip, the second input and output terminal of the first switch assembly and the first input and output terminal of the second switch assembly The first capacitor terminal of the voltage bootstrap chip is formed together, and the negative electrode of the first unidirectional conductive component and the positive electrode of the second unidirectional conductive component together constitute the second capacitor terminal of the voltage bootstrap chip, The negative electrode of the second unidirectional conduction component and the drain of the first field effect transistor jointly constitute the working power terminal of the voltage bootstrap chip, and the source of the first field effect transistor and the second field effect transistor The source of the effect tube jointly constitutes the first voltage output terminal of the voltage bootstrap chip, and the negative pole of the third unidirectional conducting component and the positive pole of the fourth unidirectional conducting component together constitute the voltage bootstrap chip The third capacitor terminal, the negative electrode of the fourth unidirectional conduction component is the output terminal of the voltage bootstrap chip, and the second input and output terminal of the second switch component and the drain of the second field effect transistor are common Constitute the ground terminal of the voltage bootstrap chip;

The anode of the first light energy harvesting component is connected to the input power terminal of the voltage bootstrap chip, the first end of the first energy storage component is connected to the first capacitor terminal of the voltage bootstrap chip, and the The second end of the first energy storage component is connected to the second capacitor end of the voltage bootstrap chip, and the first end of the second energy storage component is connected to the third capacitor end of the voltage bootstrap chip. The positive electrode of the first battery is connected to the output terminal of the voltage bootstrap chip, the second terminal of the second energy storage component is connected to the first voltage output terminal of the voltage bootstrap chip, and the third energy storage component The first terminal of the voltage bootstrap chip is connected to the working power terminal, the negative electrode of the first light energy harvesting component, the ground terminal of the voltage bootstrap chip, and the negative electrode of the first battery are connected to the power ground The first light energy collection component is configured to generate a first voltage according to the received light energy; the first unidirectional conduction component and the third unidirectional conduction component are both configured to unidirectionally conduct the first voltage; The first energy storage component and the second energy storage component are both configured to charge according to the first voltage; the second switch component is configured to turn off the power ground and the first storage component according to a second control signal. The connection of the energy component; the first switch component is configured to connect the positive electrode of the first light energy collection component and the first end of the first energy storage component according to a first control signal to enable the first energy storage component The second end of the second terminal generates a first voltage doubler voltage; the second unidirectional conduction component is configured to unidirectionally conduct the first voltage or the first voltage doubler voltage, and the third energy storage component is configured to conduct the first voltage or the first voltage doubler according to the The first multiplier voltage is charged and a second voltage is generated to supply power to the voltage bootstrap chip, and the first field effect transistor connects the working power terminal of the voltage bootstrap chip and the voltage according to a third control signal Bootstrap the first voltage output terminal of the chip to connect the first light energy collection component, the first energy storage component, and the second energy storage component in series to connect the first light energy collection component, the first energy storage component, and the second energy storage component to the first The battery is charged.
8. The voltage bootstrap chip of claim 1, wherein the first switch component is a third field effect transistor, and the second switch component is a fourth field effect transistor.
The voltage bootstrap chip of claim 1, wherein the first unidirectional conducting component is a first diode, the second unidirectional conducting component is a second diode, and the third unidirectional conducting component is a second diode. The unidirectional conducting component is a third diode, and the fourth unidirectional conducting component is a fourth diode.
A control method of a voltage bootstrap chip according to claim 1, characterized in that it comprises:

Step A1: The input power terminal of the voltage bootstrap chip inputs the first voltage output by the first light energy collection component, and the first unidirectional conduction component and the second unidirectional conduction component are both unidirectionally conducted. The first voltage, the third energy storage component is charged according to the first voltage and generates the second voltage, and the voltage bootstrap chip works according to the second voltage;

Step A1: After the voltage bootstrap chip works, the first switch component is controlled by the first control terminal of the voltage bootstrap chip to turn off the first energy storage component and the first light energy collection component. Connected, the second switch component is controlled to be turned on through the second control terminal of the voltage bootstrap chip so that the first terminal of the first energy storage component is connected to the power ground; the first energy storage component is based on the The first voltage turned on by the first unidirectional conduction component is charged and the first charging voltage is generated; the third control terminal of the voltage bootstrap chip is controlled to be a low level to make the second energy storage component according to the first Two unidirectional conducting components charge the first voltage unidirectionally conducting and generate a second charging voltage;

Step A3: Input a second control signal through the second control terminal of the voltage bootstrap chip to control the second switch component to turn off, so that the first terminal of the first energy storage component is disconnected from the power ground; The first control terminal of the voltage bootstrap chip is controlled to input a first control signal, so that the potential of the first terminal of the first energy storage component is equal to the potential of the anode of the first light energy collection component, and the first storage component The first multiplier voltage at the second terminal of the energy component is the sum of the first voltage and the first charging voltage; the third control terminal of the voltage bootstrap chip is controlled to input a third control signal, so that the second The potential of the second terminal of the energy storage component is equal to the potential of the working power terminal of the voltage bootstrap chip, and the potential of the second terminal of the second energy storage component is equal to the potential of the first terminal of the first energy storage component, so that the The second multiplier voltage of the first terminal of the second energy storage component is equal to the sum of the first voltage, the first charging voltage, and the second charging voltage, and the third control signal is at a high level; The first terminal of the second energy storage component outputs the second doubled voltage to charge the first battery through the fourth unidirectional conduction component.
A low-light collection device connected to a first battery, characterized by comprising a first light energy collection component, a first energy storage component, a second energy storage component, a third energy storage component, and any of claims 1 to 4 One of the mentioned voltage bootstrap chips.
A weak light collection circuit, connected to a first battery, characterized in that it includes a microprocessor, a first switch component, a second switch component, a first light energy collection component, a first energy storage component, and a second energy storage component , The third energy storage component, the first one-way communication component, the second one-way communication component, the third one-way communication component, and the fourth one-way communication component;

The first light energy collection component is configured to generate a first voltage according to the received light energy;

The first unidirectional conduction component is connected to the first light energy collection component and configured to conduct the first voltage unidirectionally;

The third unidirectional conduction component is connected to the first light energy collection component and configured to conduct the first voltage unidirectionally;

The second unidirectional conduction component is connected to the first unidirectional conduction component and is configured to unidirectionally conduct the first voltage or the first voltage doubler;

The first energy storage component is connected to the first unidirectional conduction component and is configured to charge according to the first voltage;

The second energy storage component is connected to the third unidirectional conduction component and is configured to charge according to the first voltage;

The third energy storage component is connected to the second unidirectional conduction component, and is configured to charge according to the first voltage or the first doubled voltage and generate a second voltage;

The first switch component is connected to the first light energy collection component, the first one-way conduction component, the third one-way conduction component, and the first energy storage component, and is configured to communicate according to a first control signal The first light energy collection component and the first energy storage component;

The second switch component is connected to the first energy storage component and the second switch component, and is configured to turn off the connection between the power ground and the first energy storage component according to a second control signal;

The microprocessor has a second voltage output terminal connected to the first switch component, a third voltage output terminal connected to the second switch component,

The input power terminal connected to the anode of the second unidirectional conduction component and the first terminal of the third energy storage component, the second terminal of the second switch component, and the first terminal of the third energy storage component The two terminals, the negative electrode of the first light energy collection component are commonly connected to the ground terminal of the power ground, and the first voltage output terminal connected to the second terminal of the second energy storage component, configured to be based on the second voltage Work to generate the first control signal and the second control signal so that the anode of the first light energy collection component is connected to the first end of the first energy storage component, and a third control signal is generated to enable all The second end of the second energy storage component is connected to the second end of the first energy storage component through the second unidirectional conduction component so that the first light energy collection component and the first energy storage component And the second energy storage component is connected in series to charge the first battery through the fourth unidirectional conduction component.
7. The low light collection circuit of claim 6, wherein the first light energy collection component is a first light energy panel, the first energy storage component is a first capacitor, and the second energy storage component is Is a second capacitor, the third energy storage component is a third capacitor, the first one-way conducting component is a first diode, the second one-way conducting component is a second diode, and the first The three unidirectional conducting component is a third diode, and the fourth unidirectional conducting component is a fourth diode.
7. The weak light collection circuit of claim 6, wherein the first switch component includes a third field effect transistor, and the second switch component includes a fourth field effect transistor.
A control method of a weak light collection circuit according to claim 6, characterized in that it comprises:

Step B1: The input power terminal of the microprocessor inputs the first voltage output by the first light energy collection component, the third energy storage component is charged according to the first voltage and generates a second voltage, the The microprocessor works according to the second voltage;

Step B2: After the microprocessor works, the first switch component is controlled to turn off the connection between the first energy storage component and the first light energy collection component through the second voltage output terminal of the microprocessor , Controlling the conduction of the second switch component through the third voltage output terminal of the microprocessor so that the first terminal of the first energy storage component is connected to the power ground; A first voltage conducted by a unidirectional conduction component is charged and generates a first charging voltage; the first voltage output terminal of the microprocessor is controlled to be a low level to make the second energy storage component according to the third Charging the first voltage unidirectionally conducted by the unidirectional conduction component and generating a second charging voltage;

Step B3: output a second control signal through the third voltage output terminal of the microprocessor to control the second switch component to turn off, so that the first terminal of the first energy storage component is disconnected from the power ground; The second voltage output terminal of the microprocessor is controlled to output the first control signal, so that the potential of the first terminal of the first energy storage component is equal to the potential of the anode of the first light energy collection component, and the first energy storage component The first multiplier voltage at the second terminal of the energy component is the sum of the first voltage and the first charging voltage; the first voltage output terminal of the microprocessor is controlled to input a third control signal, so that the second The potential of the second terminal of the energy storage component is equal to the potential of the input power terminal of the microprocessor, and the potential of the second terminal of the second energy storage component is equal to the potential of the second terminal of the first energy storage component, so that the second The second doubled voltage of the first end of the energy storage component is equal to the sum of the first voltage, the first charging voltage, and the second charging voltage; the second voltage of the first end of the second energy storage component is The second double-voltage voltage charges the first battery through the fourth unidirectional conduction component.