Buck-boost LDO topology method based on photon power DC-DC converter

Abstract

This invention discloses a boostable LDO topology based on a photon-powered DC-DC converter. This topology utilizes the luminous properties of LEDs and the photovoltaic effect of photovoltaic cells (PV) to achieve efficient conversion of electrical energy through light energy transfer. In this system, the LED acts as a light source, converting electrical energy into light energy, and the PV cell acts as a receiver, converting the received light energy back into electrical energy, thereby achieving the transmission and conversion of electrical energy. Compared with traditional LDOs, this invention not only solves the problem of traditional LDOs being unable to achieve boost, but also provides a more efficient and stable power management solution through photon-powered energy conversion technology. This technology has important research significance and application value in the fields of power management and chip power supply.

Description

Technical Field

[0001] The present invention relates to the field of electric energy conversion, and in particular to a buck-boost LDO topology method based on a photon electric energy DC-DC converter. Background Art

[0002] With the rapid development of electronic devices, the demand for efficient, stable, and miniaturized power management technologies is increasing. Although traditional DC-DC converters offer excellent power conversion efficiency, they suffer from issues such as large size, high output ripple, and electromagnetic interference (EMI), making them difficult to meet the high-quality output requirements of modern electronic devices.

[0003] An LDO is a low-voltage step-down (LDO) regulator that maintains a stable output when the input voltage approaches the output voltage, offering advantages such as high efficiency and low noise. These technologies have, to a certain extent, addressed the single input and output issues of photonic power converters. However, an LDO topology capable of achieving both step-up and step-down voltage conversion remains lacking.

[0004] Photonic power converters, an emerging power conversion technology, utilize light-emitting diodes (LEDs) and photovoltaic cells (PV) for energy conversion and transmission, offering advantages such as high-quality power output, low electromagnetic interference, and low output ripple. LEDs, as highly efficient electro-optical conversion devices, can directly convert electrical energy into light, while PV cells utilize the photovoltaic effect to convert light into electrical energy. This electrical-optical-electrical coupling method theoretically achieves electrical isolation and zero EMI, meeting the requirements of high-precision power supplies. Summary of the Invention

[0005] The present invention discloses a buck-boost LDO topology method based on a photon electric energy DC-DC converter. This topology utilizes the luminous characteristics of LEDs and the photovoltaic effect of photovoltaic cells (PV) to achieve electrical energy conversion through light energy transfer. The LED is used as the light source, the PV is used as the receiving end, and the output voltage is fed back to the error amplifier EA through the voltage divider resistors (R1, R2). The error amplifier EA adjusts the power tube M according to the feedback signal. P Control the input current of the LED to form a closed-loop voltage stabilization system; aiming to break through the limitation of traditional LDO inability to boost voltage by converting light energy, combining light energy conversion technology with power management system to design a more efficient and stable power supply solution, expanding its application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. The technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings of the present invention. Obviously, the described embodiments are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0007] Figure 1 Schematic diagram of a buck-boost LDO topology structure based on a photon power DC-DC converter in an embodiment of the present invention;

[0008] Figure 2 Schematic diagram of the working principle of the buck-boost LDO main circuit based on photon power DC-DC converter in an embodiment of the present invention;

[0009] Figure 3 Schematic diagram of the working principle of a buck-boost LDO feedback circuit based on a photon power DC-DC converter in an embodiment of the present invention;

[0010] Figure 4 The flowchart of the method for implementing a buck-boost LDO based on a photon power DC-DC converter in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0011] To make the objectives, technical solutions, and features of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0012] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the buck-boost LDO topology structure of the photon power DC-DC converter of the present invention, which includes: a main circuit part, a feedback circuit part and a sampling part;

[0013] The main circuit part includes: a DC source , input side LED, output side photovoltaic PV module 1, second grounding point GND2, the specific connection method is:

[0014] The positive electrode of the input side LED and the DC source connected;

[0015] The cathode of the input side LED and the power tube M p The source is connected;

[0016] The positive electrode of the output-side photovoltaic PV component 1 and the first resistor R 1, the output terminal connected;

[0017] The negative electrode of the output-side photovoltaic PV component 1 is connected to the second grounding point GND2;

[0018] The input-side LED and the output-side photovoltaic PV assembly 1 are placed in a space enclosed by reflectors.

[0019] The feedback circuit part includes: a reference voltage , the third resistor R 3. Error amplifier EA, power tube M p , the first ground point GND1, the specific connection method is:

[0020] The positive input terminal of the error amplifier EA is connected to the reference voltage connected;

[0021] The negative input terminal of the error amplifier EA is connected to the first resistor R The second end of 1, the second resistor R 2 are connected to the first end;

[0022] The output port of the error amplifier EA is connected to the power tube M p The gate is connected;

[0023] The power tube M p The drain and the third resistor R 3 are connected to the first end;

[0024] The third resistor R The second end of 3 is connected to the first ground point GND1;

[0025] The sampling part includes: a first resistor R 1. Second resistor R 2. The second ground point GND2, the specific connection method is:

[0026] The first resistor R The first end of 1 is connected to the positive electrode of the output-side photovoltaic PV component 1;

[0027] The first resistor R 1 and the first resistor R The first end of 2 is connected to the negative input terminal of the error amplifier EA;

[0028] The second resistor R The second end of 2 is connected to the second ground point GND2.

[0029] Please refer to Figure 2 , Figure 2 The schematic diagram of the working principle of the buck-boost LDO main circuit based on the photon power DC-DC converter of the present invention is shown in FIG. Figure 4 The specific buck-boost method is as follows:

[0030] Based on the circuit structure of the photon-electricity DC-DC converter's electrical-optical-electricity transmission, the input-side LED converts electrical energy into light energy, and the generated photons are transmitted through the photon transmission channel to the output-side photovoltaic PV module 1. N A photovoltaic PV receiver, where the high voltage gain of the photon-to-electricity converter can be expressed as:

[0031]

[0032] in and It is the input side LED performance parameter, and its specific value should be determined according to the actual LED device. is the luminous flux, is the proportional coefficient of illuminance to photocurrent, S is the illuminated surface area, I o is the reverse saturation current, N is the number of PV modules in the output side PV module 1, k is the Boltzmann constant, A is the ideal factor, T emp is the temperature of PV, q is the charge, V LED is the input side LED voltage, I LED is the input side LED current, V PV is a single PV output voltage, P LED is the input side LED power, V out is the output voltage.

[0033] Please refer to Figure 3 , Figure 3 The schematic diagram of the working principle of the buck-boost LDO feedback circuit based on the photon power DC-DC converter of the present invention is shown in FIG. Figure 4 The specific voltage stabilization method is as follows:

[0034] When the output voltage changes, through the first resistor R 1 and the second resistor R2, the voltage at the negative input of the error amplifier EA will also change; the error amplifier EA will amplify this voltage difference and drive the power tube M p , the power tube M p Control the input current of the input side LED; if the output voltage Lower than the reference voltage The error amplifier EA will increase the driving signal, so that the power tube M p The on-state voltage increases, which increases the input current of the input side LED, thereby increasing the output voltage ; On the contrary, if the output voltage Higher than the reference voltage , the error amplifier EA will reduce the driving signal, making the power tube M p The on-state voltage is reduced, which reduces the input current of the input side LED, thereby reducing the output voltage , which can be specifically expressed as:

[0035]

[0036] in, V CC is the input side voltage, is the power tube voltage, is the voltage of the third resistor R3, I LED is the input side LED current;

[0037] When the input-side LED is turned on, its conduction voltage remains unchanged;

[0038] When the error voltage hour, Reduce, Increase, Increase, Increase;

[0039] When the error voltage hour, Increase, Reduce, Reduce, reduce;

[0040] in, is the reference voltage, is the voltage of the second resistor R2.

Claims

1. A buck-boost LDO topology method based on photon power DC-DC converter, characterized in that: include: DC source , reference voltage , output voltage , input side LED, output side photovoltaic PV module 1, first resistor R 1. Second resistor R 2. The third resistor R 3. Error amplifier EA, power tube M p , a first grounding point GND1, a second grounding point GND2; The positive electrode of the input side LED and the DC source connected; The cathode of the input side LED and the power tube M p The source is connected; The positive input terminal of the error amplifier EA is connected to the reference voltage connected; The negative input terminal of the error amplifier EA is connected to the first resistor R The second end of 1, the second resistor R 2 are connected to the first end; The output port of the error amplifier EA is connected to the power tube M p The gate level is connected; The power tube M p The drain and the third resistor R 3 are connected to the first end; The third resistor R The second end of 3 is connected to the first ground point GND1; The output side photovoltaic PV assembly 1 includes photovoltaic elements: photovoltaic elements PV 11 、Photovoltaic elements PV 12 , ..., and photovoltaic elements PV 1N ; The positive electrode of the output-side photovoltaic PV component 1 and the first resistor R 1, the output voltage connected; The negative electrode of the output-side photovoltaic PV component 1 is connected to the second grounding point GND2; The first resistor R 1 and the second resistor R 2 are connected to the first end; The second resistor R The second end of 2 is connected to the second ground point GND2; The input-side LED and the output-side photovoltaic PV assembly 1 are placed in a space enclosed by reflectors.

2. The boostable LDO topology method based on photon power DC-DC converter according to claim 1 is characterized in that: By utilizing the light-emitting characteristics of the input-side LED and the photovoltaic effect of the output-side photovoltaic PV module 1, electrical energy conversion is achieved through light energy transfer. The input-side LED serves as a light source, and the output-side photovoltaic PV module 1 serves as a receiving end, as follows: in and It is the input side LED performance parameter, and its specific value should be determined according to the actual LED device. is the luminous flux, is the proportional coefficient of illuminance to photocurrent, S is the illuminated surface area, I o is the reverse saturation current, N is the number of PV modules in the output side PV module 1, k is the Boltzmann constant, A is the ideal factor, T emp is the temperature of PV, q is the charge, V out is the output voltage, P LED is the input side LED power.

3. The boostable LDO topology method based on photon power DC-DC converter according to claim 2 is characterized in that: The output voltage Through the first resistor R 1. The second resistor R 2 is fed back to the error amplifier EA, which is fed back to the error amplifier EA through the power tube M p Control the input current of the input side LED to form a closed-loop voltage regulation, as follows: in, V CC is the input side voltage, is the power tube voltage, is the voltage of the third resistor R3, I LED is the input side LED current; When the input-side LED is turned on, its conduction voltage remains unchanged; When the error voltage hour, Reduce, Increase, Increase, Increase; When the error voltage hour, Increase, Reduce, Reduce, reduce; in, is the reference voltage, is the voltage of the second resistor R2.

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