A self-boosting wide-adaptive power supply

Abstract

This invention belongs to the field of wide-adaptability power supply technology, and particularly to a self-boosting wide-adaptability power supply. It includes a power module, a rectifier unit, a filter capacitor, a boost circuit, a secondary filter capacitor, a voltage divider circuit, a power chip, an inductor, a voltage divider detection circuit, a first transistor, and an output rectifier capacitor. Pins 1 and 2 of the power chip are connected to the boost circuit and the voltage divider circuit, and pins 1 and 2 of the power chip are connected to the positive and negative terminals of the rectifier unit to the power module. Pin 1 of the power chip is connected to the inductor and the fifth diode to the load circuit. In this invention, the power supply is converted into a rectified drive voltage by the rectifier circuit. This voltage is then fed into the power chip via the seventh resistor in the boost circuit, which in turn activates the third transistor. The boost circuit then increases the input power supply voltage. When the power supply voltage is high, the boost circuit is shut down, and the boosting stops. The input power supply is then directly supplied to the subsequent load circuit through the inductor and the fifth diode, providing a suitable power supply voltage.

Description

Technical Field

[0001] This utility model belongs to the field of wide adaptability power supply technology, specifically relating to a self-boosting wide adaptability power supply. Background Technology

[0002] With the rapid development of various electronic devices and power supplies, power supplies are being used more and more in various fields. At the same time, the precise control and accurate output of power supplies to different electronic devices have become an increasingly important aspect for users.

[0003] Conventional power supplies only perform simple rectification and filtering, and cannot achieve output voltage boost control or adaptive output voltage, making electronic devices unable to adapt to a wide range of power supplies. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a self-boosting wide-range adaptable power supply. The incoming power supply is rectified by a rectifier circuit to form a rectified drive voltage. This voltage is then fed into the power supply chip via the seventh resistor in the boost circuit and the third transistor, thus increasing the input power supply voltage. When the power supply voltage is high, the boost circuit is shut down, stopping the boost. The input power supply is then directly supplied to the subsequent load circuit via an inductor and the fifth diode, providing a suitable power supply voltage, thereby adapting to a wide range of power supplies.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-boosting wide-adaptive power supply, comprising a power module and a rectifier unit connected to the power module, further comprising a filter capacitor, a boost circuit, a secondary filter capacitor, a voltage divider circuit, a power chip, an inductor, a voltage divider detection circuit, a first transistor, and an output rectifier capacitor; pins 1 and 2 of the power chip are connected to the boost circuit and the voltage divider circuit, and pins 1 and 2 of the power chip are connected to the positive and negative terminals of the rectifier unit to the power module; pin 1 of the power chip is connected to the inductor and the fifth diode to the load circuit;

[0006] The boost circuit includes a third transistor and a seventh resistor. The base of the third transistor is connected to the seventh resistor and the voltage divider circuit. The emitter of the third transistor is connected to the power module, and the collector of the third transistor is connected to the power chip.

[0007] The voltage divider circuit includes a fifth resistor, a sixth resistor, and a second transistor. The base of the second transistor is connected to the fifth and sixth resistors, the collector of the second transistor is connected to the base of the third transistor, and the emitter of the second transistor is connected to the power supply module.

[0008] The voltage divider detection circuit includes a second resistor and a fourth resistor. Pin 3 of the power chip is connected to the second resistor to the power module, and the output rectifier capacitor is also connected through the fourth resistor.

[0009] Furthermore, pin 4 of the power chip is connected to a third resistor, pin 5 of the power chip is connected to the base of the first transistor, the emitter of the first transistor is connected to the power module via a third resistor for working current detection, and the collector of the first transistor is connected to the load circuit.

[0010] Furthermore, pins 1 and 2 of the power chip are also connected to a first resistor and a second capacitor for supplying power to the power chip.

[0011] Furthermore, filter capacitors are connected to both ends of the rectifier unit, and secondary filter capacitors are connected to both ends of the boost circuit.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) The power supply of this utility model is converted into a rectified driving voltage by the rectifier circuit. The voltage is then input to the power chip through the seventh resistor in the boost circuit and the third transistor conduction circuit. The boost circuit is then added to increase the voltage of the input power supply. When the power supply voltage is high, the fifth and sixth resistors in the voltage divider circuit drive the second transistor to conduct and turn off the third transistor, thereby shutting down the boost circuit. The boosting stops, and the input power supply is directly output to the load circuit through the inductor and the fifth diode to power the electrical appliances. This provides a suitable power supply voltage to the subsequent load circuit, thus adapting to a wide range of power supplies.

[0014] The power supply chip is powered by the first resistor and the second capacitor; the output voltage is detected by the voltage divider circuit formed by the second resistor and the fourth resistor. When the voltage is low, the power supply chip outputs a square wave signal to drive the first transistor to conduct. When the output power supply voltage is high, the square wave output stops and the boost circuit stops working; the third resistor is used for working current detection to prevent the first transistor from being damaged by overcurrent. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings;

[0016] Figure 1 This is a schematic diagram of the circuit principle of this utility model. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] Please see Figure 1This utility model provides the following technical solution: a self-boosting wide-adaptive power supply, including a power module and a rectifier unit connected to the power module, and further including a filter capacitor C1, a boost circuit, a secondary filter capacitor C3, a voltage divider circuit, a power chip IC, an inductor L1, a voltage divider detection circuit, a first transistor Q1, and an output rectifier capacitor C4; pins 1 and 2 of the power chip IC are connected to the boost circuit and the voltage divider circuit, and pins 1 and 2 of the power chip IC are connected to the positive and negative terminals of the rectifier unit to the power module; pin 1 of the power chip IC is connected to the inductor L1 and the fifth diode D5 to the load circuit;

[0019] The boost circuit includes a third transistor Q3 and a seventh resistor R7. The base of the third transistor Q3 is connected to the seventh resistor R7 and the voltage divider circuit. The emitter of the third transistor Q3 is connected to the power module, and the collector of the third transistor Q3 is connected to the power chip IC.

[0020] The voltage divider circuit includes a fifth resistor R5, a sixth resistor R6, and a second transistor Q2. The base of the second transistor Q2 is connected to the fifth resistor R5 and the sixth resistor R6. The collector of the second transistor Q2 is connected to the base of the third transistor Q3. The emitter of the second transistor Q2 is connected to the power supply module.

[0021] The voltage divider detection circuit includes a second resistor R2 and a fourth resistor R4. Pin 3 of the power chip IC is connected to the second resistor R2 to the power module, and the output rectifier capacitor C4 is also connected through the fourth resistor R4.

[0022] In this embodiment, pin 4 of the power chip IC is connected to a third resistor R3, pin 5 of the power chip IC is connected to the base of the first transistor Q1, the emitter of the first transistor Q1 is connected to the power module via a third resistor R3 for working current detection, and the collector of the first transistor Q1 is connected to the load circuit.

[0023] In this embodiment, pins 1 and 2 of the power chip IC are also connected to a first resistor R1 and a second capacitor C2 for supplying power to the power chip IC.

[0024] In this embodiment, a filter capacitor C1 is connected to both ends of the rectifier unit, and a secondary filter capacitor C2 is connected to both ends of the boost circuit.

[0025] In this embodiment, the rectifier unit is a rectifier circuit composed of a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, used to convert the voltage output by the power supply into a rectified drive voltage.

[0026] Specifically, the power module has an AC power supply (AC) and a DC power supply (DC), with the AC power supply being 240V and the DC power supply being 12V.

[0027] The working principle and usage process of this utility model are as follows: When in use, the power supply enters the rectifier circuit composed of the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4. The rectifier circuit converts the output voltage of the power supply into a rectified driving voltage. After being filtered by the filter capacitor C1, the driving voltage passes through the seventh resistor R7 and the third transistor Q3 in the boost circuit. The third transistor Q3 is the working and conducting circuit of the boost circuit. After being filtered by the second-stage filter capacitor C3, it is input to the power chip IC. When the power supply voltage is high, the fifth resistor R5 and the sixth resistor R6 in the voltage divider circuit drive the second transistor Q2 to conduct and turn off the third transistor Q3, thereby turning off the boost circuit. The input power supply is directly output to the load circuit to power the electrical appliances through the inductor L1 and the fifth diode D5.

[0028] The power supply IC is powered by the first resistor R1 and the second capacitor C2; the second resistor R2 and the fourth resistor R4 form a voltage divider circuit to detect the output voltage level. When the voltage is low, the power supply IC outputs a square wave signal to drive the first transistor Q1 to conduct. When the output power supply voltage is high, the square wave output stops and the boost circuit stops working; the third resistor R3 is used for operating current detection to prevent the first transistor Q1 from being damaged by overcurrent.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A self-boosting, wide-adaptive power supply, comprising a power module and a rectifier unit connected to the power module, characterized in that: It also includes a filter capacitor (C1), a boost circuit, a secondary filter capacitor (C3), a voltage divider circuit, a power supply chip (IC), an inductor (L1), a voltage divider detection circuit, a first transistor (Q1), and an output rectifier capacitor (C4); pins 1 and 2 of the power supply chip (IC) are connected to the boost circuit and the voltage divider circuit, and pins 1 and 2 of the power supply chip (IC) are connected to the positive and negative terminals of the rectifier unit to the power module; pin 1 of the power supply chip (IC) is connected to the inductor (L1) and the fifth diode (D5) to the load circuit; The boost circuit includes a third transistor (Q3) and a seventh resistor (R7). The base of the third transistor (Q3) is connected to the seventh resistor (R7) and the voltage divider circuit. The emitter of the third transistor (Q3) is connected to the power module, and the collector of the third transistor (Q3) is connected to the power chip (IC). The voltage divider circuit includes a fifth resistor (R5), a sixth resistor (R6), and a second transistor (Q2). The base of the second transistor (Q2) is connected to the fifth resistor (R5) and the sixth resistor (R6). The collector of the second transistor (Q2) is connected to the base of the third transistor (Q3). The emitter of the second transistor (Q2) is connected to the power supply module. The voltage divider detection circuit includes a second resistor (R2) and a fourth resistor (R4). Pin 3 of the power chip (IC) is connected to the second resistor (R2) to the power module, and the output rectifier capacitor (C4) is also connected through the fourth resistor (R4).

2. The self-boosting wide-adaptive power supply according to claim 1, characterized in that: The power chip (IC) has a third resistor (R3) connected to pin 4, a first transistor (Q1) connected to pin 5, a third resistor (R3) for working current detection connected to the power module, and a collector connected to the load circuit.

3. The self-boosting wide-adaptive power supply according to claim 1, characterized in that: Pins 1 and 2 of the power chip (IC) are also connected to a first resistor (R1) and a second capacitor (C2) for supplying power to the power chip (IC).

4. The self-boosting wide-adaptive power supply according to claim 1, characterized in that: A filter capacitor (C1) is connected across the rectifier unit, and a secondary filter capacitor (C2) is connected across the boost circuit.

5. The self-boosting wide-adaptive power supply according to claim 1, characterized in that: The rectifier unit consists of a rectifier circuit composed of a first diode (D1), a second diode (D2), a third diode (D3), and a fourth diode (D4), which is used to convert the voltage output by the power supply into a rectified drive voltage.

6. The self-boosting wide-adaptive power supply according to claim 1, characterized in that: The power module has an AC power supply (AC) and a DC power supply (DC), with the AC power supply being 240V and the DC power supply being 12V.

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