Multi-voltage output circuit

Abstract

The utility model relates to the technical field of electronic circuits, and particularly discloses a multi-voltage output circuit, which comprises an alternating current input circuit, a boost switching circuit, a monitoring circuit, a charging circuit and a driving circuit, and is characterized in that the alternating current input circuit is electrically connected with the charging circuit, the driving circuit and the boost switching circuit respectively; the monitoring circuit is electrically connected with the AC input circuit, the boost switching circuit, the charging circuit and the driving circuit. According to the utility model, the charging circuit is arranged to convert alternating current into voltage for charging the battery to be used for charging the battery, the boost switching circuit is arranged to boost direct current voltage to different voltage values so as to charge different devices, the use is more convenient, the charging circuit is detected and controlled through the monitoring circuit, and the charging efficiency is improved. The charging voltage and current can be effectively managed, and the boost switching circuit can be monitored at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a multi-voltage output circuit. Background Art

[0002] With the continuous development of power supply industry technology, energy saving, environmental protection and low carbon demands, the research on high-efficiency and low-energy circuit topology has made great progress. People usually carry multiple mobile terminal devices (including laptops) when traveling or doing outdoor activities. Each mobile device requires a different voltage when charging, and the charging input sockets of different laptops are basically different. This requires carrying multiple chargers or mobile power supplies for different applications to charge different devices, which is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, a multi-voltage output circuit is provided, which converts AC power into a voltage for charging a battery by setting a charging circuit, and increases the DC voltage to different voltage values ​​by setting a boost switching circuit, so as to charge different devices, making it more convenient to use. The charging circuit is detected and controlled by a monitoring circuit, so that the charging voltage and current can be effectively managed, and the boost switching circuit can be monitored at the same time.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A multi-voltage output circuit includes an AC input circuit, a boost switching circuit, a monitoring circuit, a charging circuit and a driving circuit, wherein the AC input circuit is electrically connected to the charging circuit, the driving circuit and the boost switching circuit respectively, and the monitoring circuit is electrically connected to the AC input circuit, the boost switching circuit, the charging circuit and the driving circuit respectively.

[0006] Preferably, the monitoring circuit includes a main control chip U1, an interface J8, a resistor R14, a resistor R15, a capacitor C4, an adjustable resistor RW1 and a capacitor C52, the resistor R14, the resistor R15 and the capacitor C4 are all connected to the interface J8, and the interface J8, the adjustable resistor RW1 and the capacitor C52 are all connected to the main control chip U1.

[0007] Preferably, the AC input circuit includes an interface P8, an interface P10, a fuse F1, a fuse F2, a fuse F3, a fuse F4, a transistor M1, a transistor M2, a transistor M3, a transistor M4, a transformer TB2, a transformer CT1, a diode D1, a diode D2, a diode D3, a diode D4, a diode D6, a diode D7, a diode D9 and a diode D10. The fuse F1, the fuse F2, the fuse F3 and the fuse F4 are respectively connected to the interface P8, the interface P10, the transistor M1 and the transistor M2. The transformer TB2 is respectively connected to the transistor M1, the transistor M2, the transistor M3, the transistor M4, the diode D1, the diode D2, the diode D3 and the diode D4. The transformer CT1 is respectively connected to the transistor M1, the transistor M2, the transistor M3, the transistor M4, the diode D6, the diode D7, the diode D9 and the diode D10. The diode D6, the diode D7, the diode D9 and the diode D10 are all connected to the main control chip U1.

[0008] Preferably, the boost switching circuit includes a transformer TB1, an inductor L3, a relay KM1, an interface JP, a relay K1 and an adjustable resistor RW2, the transformer TB1 is respectively connected to the diode D1 and the inductor L3, the relay KM1 is respectively connected to the inductor L3, the relay K1 and the interface JP, and the interface JP, the relay K1 and the adjustable resistor RW2 are all connected to the main control chip U1.

[0009] Preferably, the charging circuit includes a charging control chip U2, an interface J7, an interface J11, a photocoupler OC2, a transformer TB3, an inductor L5, a diode D32, a diode D33 and a diode D34. The charging control chip U2 and the transformer TB3 are both connected to the interface P10, the transformer TB3 is respectively connected to the diode D32, the inductor L5, the diode D33 and the diode D34, the diode D34 is connected to the interface J11, the inductor L5 is connected to the interface J7, and the photocoupler OC2 is respectively connected to the charging control chip U2 and the interface J11.

[0010] Preferably, the driving circuit includes a transistor Q1, a transistor Q2, a transistor Q3, a transistor M21, a transistor M22, a transistor M23, a transistor M24, a transformer TB5, a transformer TB6, a transistor T1, a transistor T2, a transistor T3 and a transistor T4, wherein the transistor Q1 is connected to the transistor M21 and the transistor M4 respectively, the transistor Q2 is connected to the transistor M22, the transistor M1 and the transistor M3 respectively, and the transistor Q3 is connected to the transistors The transistor M23, the transistor M24 and the transistor M4 are connected, the triode Q4 is connected to the transistor M3 and the transistor M24 respectively, the transformer TB6 is connected to the transistor M21, the transistor M22 and the triode T1 respectively, the transformer TB5 is connected to the transistor M23, the transistor M24 and the triode T3 respectively, the triode T1 is connected to the main control chip U1 and the triode T2 respectively, and the triode T3 is connected to the main control chip U1 and the triode T4 respectively.

[0011] By adopting the above technical scheme, a multi-voltage output circuit provided by the utility model has the following beneficial effects: the AC input circuit in the multi-voltage output circuit is electrically connected to the charging circuit, the driving circuit and the boost switching circuit respectively, and the monitoring circuit is electrically connected to the AC input circuit, the boost switching circuit, the charging circuit and the driving circuit respectively. By setting the charging circuit, the AC power is converted into a voltage for charging the battery for use in charging the battery. By setting the boost switching circuit, the DC voltage is increased to different voltage values, so as to charge different devices, which is more convenient to use. The charging circuit is detected and controlled by the monitoring circuit, so that the charging voltage and current can be effectively managed. At the same time, the boost switching circuit can be monitored to realize monitoring and management. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0015] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0016] like Figure 1 As shown, in the circuit schematic diagram of the utility model, the multi-voltage output circuit includes an AC input circuit, a boost switching circuit, a monitoring circuit, a charging circuit and a driving circuit. The AC input circuit is electrically connected to the charging circuit, the driving circuit and the boost switching circuit respectively, and the monitoring circuit is electrically connected to the AC input circuit, the boost switching circuit, the charging circuit and the driving circuit respectively. It can be understood that in actual application, the AC input circuit, the boost switching circuit, the monitoring circuit, the charging circuit and the driving circuit can all be integrated on a PCB circuit board, so as to be installed in a charger or other charging equipment for use.

[0017] Specifically, the monitoring circuit includes a main control chip U1, an interface J8, a resistor R14, a resistor R15, a capacitor C4, an adjustable resistor RW1 and a capacitor C52, wherein the resistor R14, the resistor R15 and the capacitor C4 are all connected to the interface J8, and the interface J8, the adjustable resistor RW1 and the capacitor C52 are all connected to the main control chip U1. It can be understood that the main control chip U1 can be an 80C51 or STM32 single-chip microcomputer chip, etc., and the charging control and voltage output control are realized through the signal transmission and reception and signal processing, which is used to detect and control the charging circuit, and can effectively manage the charging voltage and charging current; it can also monitor the boost circuit, and a fault alarm will be issued if an abnormality occurs.

[0018] Specifically, the AC input circuit includes an interface P8, an interface P10, a fuse F1, a fuse F2, a fuse F3, a fuse F4, a transistor M1, a transistor M2, a transistor M3, a transistor M4, a transformer TB2, a transformer CT1, a diode D1, a diode D2, a diode D3, a diode D4, a diode D6, a diode D7, a diode D9 and a diode D10. The fuse F1, the fuse F2, the fuse F3 and the fuse F4 are respectively connected to the interface P8, the interface P10, the transistor M1 and the transistor M2. The transformer TB2 is respectively connected to the transistor M1, the transistor M2, the transistor M3, the transistor M4, the diode D1, the diode D2, the diode D3 and the diode D4. The transformer CT1 is respectively connected to the transistor M1, the transistor M2, the transistor M3, the transistor M4, the diode D6, the diode D7, the diode D9 and the diode D10. The diode D6, the diode D7, the diode D9 and the diode D10 are all connected to the main control chip U1. It can be understood that the interface P8 and the interface P10 are connected to an AC power source, which supplies power to the charging circuit on the one hand and to the boost switching circuit on the other hand.

[0019] Specifically, the boost switching circuit includes a transformer TB1, an inductor L3, a relay KM1, an interface JP, a relay K1 and an adjustable resistor RW2. The transformer TB1 is connected to the diode D1 and the inductor L3 respectively. The relay KM1 is connected to the inductor L3, the relay K1 and the interface JP respectively. The interface JP, the relay K1 and the adjustable resistor RW2 are all connected to the main control chip U1. It can be understood that the boost switching circuit is used to boost the 24V DC voltage to three specific values ​​through switch control: 48V, 110V, 220V, and the long-term power is 500W.

[0020] Specifically, the charging circuit includes a charging control chip U2, an interface J7, an interface J11, an optocoupler OC2, a transformer TB3, an inductor L5, a diode D32, a diode D33 and a diode D34. The charging control chip U2 and the transformer TB3 are both connected to the interface P10. The transformer TB3 is respectively connected to the diode D32, the inductor L5, the diode D33 and the diode D34. The diode D34 is connected to the interface J11. The inductor L5 is connected to the interface J7. The optocoupler OC2 is respectively connected to the charging control chip U2 and the interface J11. It can be understood that the charging control chip U2 can be a MPQ4428-C-AEC1 chip, etc.; the charging circuit is used to convert the AC voltage into a 24V voltage for charging the battery for use in charging the battery.

[0021] Specifically, the driving circuit includes a transistor Q1, a transistor Q2, a transistor Q3, a transistor M21, a transistor M22, a transistor M23, a transistor M24, a transformer TB5, a transformer TB6, a transistor T1, a transistor T2, a transistor T3 and a transistor T4, wherein the transistor Q1 is connected to the transistor M21 and the transistor M4 respectively, the transistor Q2 is connected to the transistor M22, the transistor M1 and the transistor M3 respectively, and the transistor Q3 is connected to the transistor M21 and the transistor M4 respectively. The transistor M23, the transistor M2 and the transistor M4 are connected, the triode Q4 is connected to the transistor M3 and the transistor M24 respectively, the transformer TB6 is connected to the transistor M21, the transistor M22 and the triode T1 respectively, the transformer TB5 is connected to the transistor M23, the transistor M24 and the triode T3 respectively, the triode T1 is connected to the main control chip U1 and the triode T2 respectively, and the triode T3 is connected to the main control chip U1 and the triode T4 respectively. It can be understood that the drive circuit is used as the entire drive source to power amplify the PWM signal generated by the digital control core (i.e., the main control chip U2) to drive the opening and closing of the power switch device, and realize current control by monitoring the DC bus current. The detection result can be used for overcurrent protection of the IGBT.

[0022] It can be understood that the utility model has a reasonable design and a unique structure. By setting a charging circuit, AC power is converted into a voltage for charging the battery for use in charging the battery. By setting a boost switching circuit, the DC voltage is increased to different voltage values, so as to charge different devices, which is more convenient to use. The charging circuit is detected and controlled by a monitoring circuit, and the charging voltage and current can be effectively managed. At the same time, the boost switching circuit can be monitored to realize monitoring and management.

[0023] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A multi-voltage output circuit, characterized in that: It includes an AC input circuit, a boost switching circuit, a monitoring circuit, a charging circuit and a driving circuit. The AC input circuit is electrically connected to the charging circuit, the driving circuit and the boost switching circuit respectively, and the monitoring circuit is electrically connected to the AC input circuit, the boost switching circuit, the charging circuit and the driving circuit respectively.

2. The multi-voltage output circuit according to claim 1, characterized in that: The monitoring circuit includes a main control chip U1, an interface J8, a resistor R14, a resistor R15, a capacitor C4, an adjustable resistor RW1 and a capacitor C52. The resistor R14, the resistor R15 and the capacitor C4 are all connected to the interface J8, and the interface J8, the adjustable resistor RW1 and the capacitor C52 are all connected to the main control chip U1.

3. The multi-voltage output circuit according to claim 2, characterized in that: The AC input circuit includes an interface P8, an interface P10, a fuse F1, a fuse F2, a fuse F3, a fuse F4, a transistor M1, a transistor M2, a transistor M3, a transistor M4, a transformer TB2, a transformer CT1, a diode D1, a diode D2, a diode D3, a diode D4, a diode D6, a diode D7, a diode D9 and a diode D10. The fuse F1, the fuse F2, the fuse F3 and the fuse F4 are respectively connected to the interface P8, the interface P10, the transistor M1 and the transistor M2. The transformer TB2 is respectively connected to the transistor M1, the transistor M2, the transistor M3, the transistor M4, the diode D1, the diode D2, the diode D3 and the diode D4. The transformer CT1 is respectively connected to the transistor M1, the transistor M2, the transistor M3, the transistor M4, the diode D6, the diode D7, the diode D9 and the diode D10. The diode D6, the diode D7, the diode D9 and the diode D10 are all connected to the main control chip U1.

4. The multi-voltage output circuit according to claim 3, characterized in that: The boost switching circuit includes a transformer TB1, an inductor L3, a relay KM1, an interface JP, a relay K1 and an adjustable resistor RW2. The transformer TB1 is connected to the diode D1 and the inductor L3 respectively. The relay KM1 is connected to the inductor L3, the relay K1 and the interface JP respectively. The interface JP, the relay K1 and the adjustable resistor RW2 are all connected to the main control chip U1.

5. The multi-voltage output circuit according to claim 3, characterized in that: The charging circuit includes a charging control chip U2, an interface J7, an interface J11, a photoelectric coupler OC2, a transformer TB3, an inductor L5, a diode D32, a diode D33 and a diode D34. The charging control chip U2 and the transformer TB3 are both connected to the interface P10, the transformer TB3 is respectively connected to the diode D32, the inductor L5, the diode D33 and the diode D34, the diode D34 is connected to the interface J11, the inductor L5 is connected to the interface J7, and the photoelectric coupler OC2 is respectively connected to the charging control chip U2 and the interface J11.

6. The multi-voltage output circuit according to claim 3, characterized in that: The driving circuit includes a transistor Q1, a transistor Q2, a transistor Q3, a transistor M21, a transistor M22, a transistor M23, a transistor M24, a transformer TB5, a transformer TB6, a transistor T1, a transistor T2, a transistor T3 and a transistor T4, wherein the transistor Q1 is connected to the transistor M21 and the transistor M4 respectively, the transistor Q2 is connected to the transistor M22, the transistor M1 and the transistor M3 respectively, and the transistor Q3 is connected to the transistor M 23, the transistor M2 is connected to the transistor M4, the transistor Q4 is connected to the transistor M3 and the transistor M24 respectively, the transformer TB6 is connected to the transistor M21, the transistor M22 and the transistor T1 respectively, the transformer TB5 is connected to the transistor M23, the transistor M24 and the transistor T3 respectively, the transistor T1 is connected to the main control chip U1 and the transistor T2 respectively, and the transistor T3 is connected to the main control chip U1 and the transistor T4 respectively.

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