A multifunctional charging circuit

Abstract

The utility model discloses a kind of multifunctional charging circuit, including the rectifier circuit being electrically connected with input power supply, the filter circuit being electrically connected with rectifier circuit, the base of switch tube Q1 is electrically connected with resistance R1, resistance R2 and the collector of switch tube Q2, the collector of switch tube Q1 is electrically connected with winding N1, the emitter of switch tube Q1 is electrically connected with resistance R3,R4.The multifunctional charging circuit disclosed in the utility model, voltage information of handheld game machine load end is given winding N2 by photocoupler U1, input voltage of the base of switch tube Q2 is adjusted by induced electromotive force of winding N2, input voltage of the base of switch tube Q1 is adjusted by collector voltage of switch tube Q2 again, finally make the induced electromotive force between winding N1 and N3 and the load of handheld game machine consistent, to realize charging to different models of handheld game machine.

Description

Technical Field

[0001] This utility model relates to the field of charging circuits, specifically to a multifunctional charging circuit that can charge old handheld game consoles in different regions. Background Technology

[0002] Nearly thirty years have passed since Nintendo launched the Game Boy handheld game console in 1989. During this time, various manufacturers have continuously launched handheld game consoles of different forms, resulting in a flourishing handheld game console market. Among them, the most popular in China are Nintendo's GBA series, NDS series, 3DS series, and the recently popular Switch. Sony's PSP and PS Vita models have also gained a good reputation and sales among a wide range of players due to their excellent design and multimedia capabilities.

[0003] With the spread of various handheld game consoles in China, a large number of handheld game console enthusiasts have been cultivated. They often own several handheld game consoles. In order to maintain the performance of these handheld game consoles, they need to take them out for charging and maintenance from time to time. However, the charger interfaces of these handheld game consoles are different, and it is very troublesome to replace the charger one by one when charging. Moreover, most of the original chargers have aging problems, which pose certain safety hazards in the long term. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multi-functional charging circuit that can automatically match the charging voltage according to the load of the handheld game console.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An improved multi-functional charging circuit includes: a rectifier circuit electrically connected to the input power supply; a filter circuit electrically connected to the rectifier circuit; the base of switch Q1 electrically connected to resistors R1 and R2 and the collector of switch Q2; the collector of switch Q1 electrically connected to winding N1; the emitter of switch Q1 electrically connected to resistors R3 and R4; the base of switch Q2 electrically connected to resistor R3 and the phototransistor in optocoupler U1; and the collector of switch Q2 electrically connected to resistors R1 and R2 and the base of switch Q1. The emitter of Q2 is electrically connected to the filter circuit. Resistor R2 is electrically connected to capacitor C1. Capacitor C1 is electrically connected to diode D1 and winding N2. Winding N2 is electrically connected to capacitor C3 and the phototransistor in optocoupler U1. Winding N1, capacitor C3, diode D1, and resistor R4 are electrically connected to the filter circuit. Winding N3 is electrically connected to capacitor C4 through diode D2. Capacitor C4 is electrically connected to the power output terminal. The light-emitting diode in optocoupler U1 is electrically connected to resistor R5. Resistor R5 is electrically connected to the power output terminal through diode D3 and resistor R6.

[0006] Furthermore, the input power supply is electrically connected to the rectifier circuit through resistor R7.

[0007] Furthermore, the rectifier circuit consists of four diodes.

[0008] Furthermore, the filter circuit consists of filter capacitor C5.

[0009] Furthermore, the collector of the switching transistor Q1 is also electrically connected to the diode D4, and the diode D4 is electrically connected to the filter circuit through the resistor R8 and the capacitor C6.

[0010] The beneficial effects of this utility model are: The multifunctional charging circuit disclosed in this utility model transmits the voltage information of the handheld game console load terminal to the winding N2 via optocoupler U1. The induced electromotive force of the winding N2 adjusts the input voltage of the base of the switching transistor Q2, and the collector voltage of the switching transistor Q2 adjusts the input voltage of the base of the switching transistor Q1. Finally, the induced electromotive force between the windings N1 and N3 is made consistent with the load of the handheld game console, thereby realizing the charging of handheld game consoles of different models. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the circuit principle of the multi-functional charging circuit disclosed in this utility model. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0013] Example 1, such as Figure 1 As shown, this embodiment discloses a multifunctional charging circuit, including a rectifier circuit electrically connected to the input power supply. The rectifier circuit consists of four diodes. The input power supply is electrically connected to the rectifier circuit through a resistor R7, which protects the rectifier circuit from damage caused by sudden voltage increases. A filter circuit, consisting of a filter capacitor C5, is also electrically connected to the rectifier circuit.

[0014] The base of transistor Q1 is electrically connected to resistors R1 and R2 and the collector of transistor Q2; the collector of transistor Q1 is electrically connected to winding N1; the emitter of transistor Q1 is electrically connected to resistors R3 and R4; the base of transistor Q2 is electrically connected to resistor R3 and the phototransistor in optocoupler U1; the collector of transistor Q2 is electrically connected to resistors R1 and R2 and the base of transistor Q1; the emitter of transistor Q2 is electrically connected to the filter circuit; and resistor R2 is electrically connected to capacitor C1. Electrical connections are made as follows: capacitor C1 is electrically connected to diode D1 and winding N2; winding N2 is electrically connected to capacitor C3 and phototransistor in optocoupler U1; winding N1, capacitor C3, diode D1, and resistor R4 are electrically connected to the filter circuit; winding N3 is electrically connected to capacitor C4 through diode D2; capacitor C4 is electrically connected to the power output terminal; the light-emitting diode in optocoupler U1 is electrically connected to resistor R5; resistor R5 is electrically connected to the power output terminal through diode D3 and resistor R6.

[0015] The collector of the switching transistor Q1 is also electrically connected to diode D4, which is electrically connected to the filter circuit through resistor R8 and capacitor C6. An RCD circuit, consisting of diode D4, resistor R8, and capacitor C6, is formed to absorb voltage spikes and further protect the handheld game console load.

[0016] The charging principle of the multi-functional charging circuit disclosed in this utility model is as follows: The 220V input voltage enters the rectifier circuit composed of four diodes through resistor R7, and is then filtered by filter capacitor C5. After the input voltage is stepped down by resistor R1, it is input to the base of switch Q1. After switch Q1 is turned on, the output voltage of the collector induces an electromotive force in windings N1 and N3. Diode D2 ensures that the current is transmitted unidirectionally from the power supply output terminal to the charging terminal of the handheld game console. Capacitor C4 further plays a filtering role to ensure the quality of the output current. Diode D3 is a Zener diode, which conducts when the voltage value at the power supply output terminal reaches its breakdown value. Resistors R5 and R6 are bias resistors. In the optocoupler, the photodiode emits light according to the voltage value at the power supply output terminal, and the phototransistor senses the light and converts the light signal back into a voltage signal. Optocoupler U1 achieves physical isolation between the circuits of windings N1 and N3 to prevent mutual interference.

[0017] After sensing the voltage of the phototransistor, capacitor C3 transmits it to winding N2, causing winding N2 to generate an induced electromotive force. This induced electromotive force is blocked by capacitor C1 and diode D1 and then input to the base of switching transistor Q2 through resistor R3, thereby changing the collector voltage of switching transistor Q2. Under the voltage division effect of resistor R2, the base and collector voltages of switching transistor Q1 are further changed, thereby adjusting the induced electromotive force of windings N1 and N3 to dynamically match the load of the handheld game console, thus realizing the function of charging different models of handheld game consoles.

Claims

1. A multifunctional charging circuit, characterized in that: This includes a rectifier circuit electrically connected to the input power supply, a filter circuit electrically connected to the rectifier circuit, a base of switch Q1 electrically connected to resistors R1 and R2 and the collector of switch Q2, a collector of switch Q1 electrically connected to winding N1, an emitter of switch Q1 electrically connected to resistors R3 and R4, a base of switch Q2 electrically connected to resistor R3 and the phototransistor in optocoupler U1, a collector of switch Q2 electrically connected to resistors R1 and R2 and the base of switch Q1, and an emitter of switch Q2 electrically connected to the filter circuit. The circuit is electrically connected as follows: resistor R2 is electrically connected to capacitor C1; capacitor C1 is electrically connected to diode D1 and winding N2; winding N2 is electrically connected to capacitor C3 and the phototransistor in optocoupler U1; winding N1, capacitor C3, diode D1, and resistor R4 are electrically connected to the filter circuit; winding N3 is electrically connected to capacitor C4 through diode D2; capacitor C4 is electrically connected to the power output terminal; the light-emitting diode in optocoupler U1 is electrically connected to resistor R5; resistor R5 is electrically connected to the power output terminal through diode D3 and resistor R6.

2. The multifunctional charging circuit according to claim 1, characterized in that: The input power supply is electrically connected to the rectifier circuit through resistor R7.

3. The multifunctional charging circuit according to claim 1, characterized in that: The rectifier circuit consists of four diodes.

4. The multifunctional charging circuit according to claim 1, characterized in that: The filter circuit consists of filter capacitor C5.

5. The multifunctional charging circuit according to claim 1, characterized in that: The collector of the switching transistor Q1 is also electrically connected to the diode D4, and the diode D4 is electrically connected to the filter circuit through the resistor R8 and the capacitor C6.

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