A transformer-isolated multi-channel power supply and signal transmission circuit

Abstract

This utility model discloses a transformer-isolated multi-channel power supply and signal transmission circuit, relating to the field of electronic circuit technology. It includes a main transformer module for high-frequency regulation and rectification filtering of the input electrical energy or signal; an isolation drive module for filtering the high-frequency regulated output electrical energy or signal from the main transformer module, performing dual-channel isolation transformation and rectification filtering, and outputting a first electrical energy and a second electrical energy respectively; and a power control module for receiving the first and second electrical energy and performing positive and negative voltage regulation on the electrical energy or signal input to the main transformer module. This transformer-isolated multi-channel power supply and signal transmission circuit achieves efficient isolated transmission of signals or power, has the ability to flexibly expand multi-channel control circuit isolation power supply, simplifies circuit design, improves integration and compatibility, reduces the size, cost, and interference impact of electronic systems, and eliminates the need for dedicated chips.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, specifically a multi-channel power supply and signal transmission circuit based on transformer isolation. Background Technology

[0002] In the circuit design of electronic devices, it is often necessary to achieve isolated signal transmission and provide isolated power (VCC) for different control circuits. Traditionally, such as... Figure 1 As shown in the circuit diagram of the multi-channel control circuit, when isolated power supply is required, dedicated chips, such as the UCC25800 chip, are often needed to build multiple independent isolation circuits. This leads to complex circuit structure, large size, increased cost, and low compatibility and integration between circuits, which is not conducive to the miniaturization and high-efficiency design of electronic devices. At the same time, existing single isolation circuits are difficult to flexibly adapt to the needs of multi-channel isolated power supply, resulting in many inconveniences in practical applications. Therefore, there is an urgent need for a circuit solution that can achieve signal isolation transmission and multi-channel isolated power supply in a simple and efficient manner. Utility Model Content

[0003] This utility model provides a transformer-isolated multi-channel power supply and signal transmission circuit to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A transformer-isolated multi-channel power supply and signal transmission circuit includes: The main transformer module is used to perform high-frequency regulation and rectification filtering on the incoming electrical energy or signal; The isolation drive module is connected to the main transformer module and is used to filter the high-frequency regulating output power or signal of the main transformer module and perform dual-channel isolation transformer and rectification filtering to output the first power and the second power respectively. The power control module, connected to the main transformer module and the isolation drive module, is used to receive the first power and the second power and to perform positive and negative voltage regulation on the power or signal input to the main transformer module.

[0005] As a further improvement of this utility model: the main transformer module includes a transformer TS1, a MOSFET Q10, a diode D3, and a capacitor C10; Preferably, the first terminal of the primary side of transformer TS1 is connected to a 380V power supply, the second terminal of the primary side of transformer TS1 is connected to the drain terminal of MOSFET Q10, the source terminal of MOSFET Q10 is grounded, the gate terminal of MOSFET Q10 is connected to a pulse signal, the first terminal of the secondary side of transformer TS1 is connected to the anode of diode D3, the cathode of diode D3 is connected to the first terminal of capacitor C10 and provides a 12V power supply, and the second terminal of capacitor C10 is connected to the second terminal of the secondary side of transformer TS1 and the ground terminal SGND.

[0006] As a further embodiment of this utility model: the isolation drive module includes a resistor R1, a capacitor C6, a transformer TS2, a diode D1, a diode D2, a capacitor C3, and a capacitor C4; Preferably, the first end of resistor R1 is connected to the first end of the secondary side of transformer TS1, the second end of resistor R1 is connected to the first end of the primary side of transformer TS2 through capacitor C6, the second end of the primary side of transformer TS2 is connected to the second end of the secondary side of transformer TS1, the first end of the first secondary side of transformer TS2 is connected to the anode of diode D1, the cathode of diode D1 is connected to the first end of capacitor C3, the second end of the first secondary side of transformer TS2 is connected to the second end of a third capacitor, the first end of the second secondary side of transformer TS2 is connected to the anode of diode D2, the cathode of diode D2 is connected to the first end of capacitor C4, and the second end of capacitor C4 is connected to the second end of the second secondary side of transformer TS2.

[0007] As a further embodiment of this utility model: the power control module includes MOSFET Q1, capacitor C1, MOSFET Q4, Q1 drive circuit and Q4 drive circuit; Preferably, the drain (D) terminal of MOSFET Q1 is connected to a 12V power supply, the gate (G) terminal of MOSFET Q1 is connected to the output terminal of the Q1 driving circuit, the input terminal of the Q1 driving circuit is connected to the cathode of diode D1 and the first terminal of capacitor C1, the second terminal of capacitor C1 is connected to the second terminal of capacitor C3 and the source (S) terminal of MOSFET Q1 and outputs the Vo1 power supply, the source (S) terminal of MOSFET Q4 is connected to ground SGND, the gate (G) terminal of MOSFET Q4 is connected to the Q4 driving circuit, and the drain (D) terminal of MOSFET Q4 is connected to the second terminal of capacitor C4.

[0008] As a further embodiment of this utility model: the power control module also includes MOSFET Q2, capacitor C2, MOSFET Q3, Q2 drive circuit and Q3 drive circuit; Preferably, the drain (D) terminal of MOSFET Q2 is connected to the drain (D) terminal of MOSFET Q1, the source (S) terminal of MOSFET Q2 is connected to the first terminal of capacitor C2 and the drain (D) terminal of MOSFET Q4, and outputs the Vo2 power supply, the gate (G) terminal of MOSFET Q2 is connected to the output terminal of the Q2 driving circuit, the input terminal of the Q2 driving circuit is connected to the second terminal of capacitor C2 and the cathode of diode D2, the source (S) terminal of MOSFET Q3 is connected to ground SGND, the drain (D) terminal of MOSFET Q3 is connected to the source (S) terminal of MOSFET Q1, and the gate (G) terminal of MOSFET Q3 is connected to the Q3 driving circuit.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the transformer-isolated multi-channel power supply and signal transmission circuit of this utility model can realize efficient isolation transmission of signals or power, has the ability to flexibly expand multi-channel control circuit isolation power supply (VCC), simplifies circuit design, improves integration and compatibility, reduces the size, cost and interference of electronic systems, and does not require dedicated chips. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A circuit diagram of a conventional multi-channel control circuit provided for an example of this utility model.

[0012] Figure 2 A circuit diagram of a transformer-isolated multi-channel power supply and signal transmission circuit is provided for this utility model embodiment. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] In this embodiment, please refer to Figure 2 A transformer-isolated multi-channel power supply and signal transmission circuit, comprising: The main transformer module is used to perform high-frequency regulation and rectification filtering on the incoming electrical energy or signal; The isolation drive module is connected to the main transformer module and is used to filter the high-frequency regulating output power or signal of the main transformer module and perform dual-channel isolation transformer and rectification filtering to output the first power and the second power respectively. The power control module, connected to the main transformer module and the isolation drive module, is used to receive the first power and the second power and to perform positive and negative voltage regulation on the power or signal input to the main transformer module.

[0015] Furthermore, the main transformer module includes a transformer TS1, a MOSFET Q10, a diode D3, and a capacitor C10; Specifically, the first terminal of the primary side of transformer TS1 is connected to a 380V power supply, the second terminal of the primary side of transformer TS1 is connected to the drain terminal of MOSFET Q10, the source terminal of MOSFET Q10 is grounded, the gate terminal of MOSFET Q10 is connected to a pulse signal, the first terminal of the secondary side of transformer TS1 is connected to the anode of diode D3, the cathode of diode D3 is connected to the first terminal of capacitor C10 and provides a 12V power supply, and the second terminal of capacitor C10 is connected to the second terminal of the secondary side of transformer TS1 and the ground terminal SGND.

[0016] In a specific embodiment, the aforementioned MOSFET Q10 can be an N-channel field-effect transistor, driven by a pulse signal provided by a related driver, controlling the transformer TS1 to perform high-frequency isolation transformation; the aforementioned diode D3 and capacitor C10 perform rectification and filtering; the aforementioned transformer TS1 can perform isolation transformation processing on the input electrical energy or signal, and the input signal can be a square wave signal.

[0017] Furthermore, the isolation drive module includes resistor R1, capacitor C6, transformer TS2, diode D1, diode D2, capacitor C3, and capacitor C4; Specifically, the first end of resistor R1 is connected to the first end of the secondary side of transformer TS1, the second end of resistor R1 is connected to the first end of the primary side of transformer TS2 through capacitor C6, the second end of the primary side of transformer TS2 is connected to the second end of the secondary side of transformer TS1, the first end of the first secondary side of transformer TS2 is connected to the anode of diode D1, the cathode of diode D1 is connected to the first end of capacitor C3, the second end of the first secondary side of transformer TS2 is connected to the second end of a third capacitor, the first end of the second secondary side of transformer TS2 is connected to the anode of diode D2, the cathode of diode D2 is connected to the first end of capacitor C4, and the second end of capacitor C4 is connected to the second end of the second secondary side of transformer TS2.

[0018] In a specific embodiment, the resistor R1 and capacitor C6 are filtered; the transformer TS2 can be composed of a primary winding and two secondary windings, and can perform dual-path transformation on the electrical energy or signal output by the transformer TS1.

[0019] Furthermore, the power control module includes MOSFET Q1, capacitor C1, MOSFET Q4, Q1 drive circuit, and Q4 drive circuit; Specifically, the drain (D) terminal of MOSFET Q1 is connected to a 12V power supply, the gate (G) terminal of MOSFET Q1 is connected to the output terminal of the Q1 driver circuit, the input terminal of the Q1 driver circuit is connected to the cathode of diode D1 and the first terminal of capacitor C1, the second terminal of capacitor C1 is connected to the second terminal of capacitor C3 and the source (S) terminal of MOSFET Q1 and outputs the Vo1 power supply, the source (S) terminal of MOSFET Q4 is connected to ground SGND, the gate (G) terminal of MOSFET Q4 is connected to the Q4 driver circuit, and the drain (D) terminal of MOSFET Q4 is connected to the second terminal of capacitor C4.

[0020] In a specific embodiment, both MOSFETs Q1 and Q4 can be N-channel field-effect transistors. When MOSFETs Q1 and Q4 are turned on, the output Vo1 power supply is 12V. The Q1 driving circuit and Q4 driving circuit are used to provide a driving square wave and drive the conduction state of MOSFETs Q1 and Q4 respectively. They are powered by a 12V power supply. The specific circuit structure is not described in detail.

[0021] Furthermore, the power control module also includes MOSFET Q2, capacitor C2, MOSFET Q3, Q2 drive circuit and Q3 drive circuit; Specifically, the drain (D) terminal of MOSFET Q2 is connected to the drain (D) terminal of MOSFET Q1. The source (S) terminal of MOSFET Q2 is connected to the first terminal of capacitor C2 and the drain (D) terminal of MOSFET Q4, outputting the Vo2 power supply. The gate (G) terminal of MOSFET Q2 is connected to the output terminal of the Q2 drive circuit. The input terminal of the Q2 drive circuit is connected to the second terminal of capacitor C2 and the cathode of diode D2. The source (S) terminal of MOSFET Q3 is connected to ground SGND. The drain (D) terminal of MOSFET Q3 is connected to the source (S) terminal of MOSFET Q1. The gate (G) terminal of MOSFET Q3 is connected to the Q3 drive circuit.

[0022] In one embodiment, both MOSFETs Q2 and Q3 can be N-channel MOSFETs. When MOSFETs Q2 and Q3 are turned on, the output Vo2 power supply is 12V. The Q2 driving circuit and Q3 driving circuit are used to provide a driving square wave and drive the conduction state of MOSFETs Q1 and Q4 respectively. They are powered by a 12V power supply. The specific circuit structure is not described in detail.

[0023] In another embodiment, the power control module composed of MOSFET Q1, capacitor C1, MOSFET Q4, Q1 drive circuit, Q4 drive circuit, MOSFET Q2, capacitor C2, MOSFET Q3, Q2 drive circuit and Q3 drive circuit can be used as the driving object of the VCC1 power supply and VCC2 power supply provided by the isolation drive module, but the VCC1 power supply and VCC2 power supply are not limited to the working state of driving the power control module.

[0024] In this embodiment, a multi-channel power supply and signal transmission circuit based on transformer isolation is used. The incoming 380V power supply or signal is isolated and transformed by transformer TS1 through a high-frequency switch (Q10) and a main transformer. The output from the secondary winding of transformer TS1, after passing through diode D3 and capacitor C10, outputs 12V power. The power output from the secondary winding of transformer TS1 is filtered by series resistor R1 and capacitor C6, and then subjected to dual-channel isolation transformation by transformer TS2. After rectification and filtering by diode D1 and capacitor C3, VCC1 power is output. After rectification and filtering by capacitor C4, the output power is VCC2, which in turn provides two power supplies: VCC1 and VCC2. VCC1 powers the Q1 drive circuit to turn on the MOSFET Q1. Simultaneously, when the Q4 drive circuit is connected to a 12V power supply, it also triggers the MOSFET Q4 to turn on, outputting a 12V Vo1 power supply. Similarly, VCC2 powers the Q2 drive circuit to turn on the MOSFET Q2. When the Q3 drive circuit is connected to a 12V power supply, it triggers the MOSFET Q3 to turn on, outputting a 12V Vo2 power supply.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-channel power supply and signal transmission circuit based on transformer isolation, characterized in that, The circuit includes: The main transformer module is used to perform high-frequency regulation and rectification filtering on the incoming electrical energy or signal; The isolation drive module is connected to the main transformer module and is used to filter the high-frequency regulating output power or signal of the main transformer module and perform dual-channel isolation transformer and rectification filtering to output the first power and the second power respectively. The power control module, connected to the main transformer module and the isolation drive module, is used to receive the first power and the second power and to perform positive and negative voltage regulation on the power or signal input to the main transformer module.

2. The multi-channel power supply and signal transmission circuit based on transformer isolation according to claim 1, characterized in that, The main transformer module includes a transformer TS1, a MOSFET Q10, a diode D3, and a capacitor C10; The first terminal of the primary side of transformer TS1 is connected to a 380V power supply. The second terminal of the primary side of transformer TS1 is connected to the drain terminal of MOSFET Q10. The source terminal of MOSFET Q10 is grounded. The gate terminal of MOSFET Q10 is connected to a pulse signal. The first terminal of the secondary side of transformer TS1 is connected to the anode of diode D3. The cathode of diode D3 is connected to the first terminal of capacitor C10 and provides a 12V power supply. The second terminal of capacitor C10 is connected to the second terminal of the secondary side of transformer TS1 and the ground terminal SGND.

3. The multi-channel power supply and signal transmission circuit based on transformer isolation according to claim 2, characterized in that, The isolated drive module includes a resistor R1, a capacitor C6, a transformer TS2, a diode D1, a diode D2, a capacitor C3, and a capacitor C4. The first end of resistor R1 is connected to the first end of the secondary side of transformer TS1. The second end of resistor R1 is connected to the first end of the primary side of transformer TS2 through capacitor C6. The second end of the primary side of transformer TS2 is connected to the second end of the secondary side of transformer TS1. The first end of the first secondary side of transformer TS2 is connected to the anode of diode D1. The cathode of diode D1 is connected to the first end of capacitor C3. The second end of the first secondary side of transformer TS2 is connected to the second end of a third capacitor. The first end of the second secondary side of transformer TS2 is connected to the anode of diode D2. The cathode of diode D2 is connected to the first end of capacitor C4. The second end of capacitor C4 is connected to the second end of the second secondary side of transformer TS2.

4. The multi-channel power supply and signal transmission circuit based on transformer isolation according to claim 3, characterized in that, The power control module includes MOSFET Q1, capacitor C1, MOSFET Q4, Q1 drive circuit, and Q4 drive circuit; The drain (D) terminal of MOSFET Q1 is connected to a 12V power supply. The gate (G) terminal of MOSFET Q1 is connected to the output terminal of the Q1 driving circuit. The input terminal of the Q1 driving circuit is connected to the cathode of diode D1 and the first terminal of capacitor C1. The second terminal of capacitor C1 is connected to the second terminal of capacitor C3 and the source (S) terminal of MOSFET Q1, and outputs the Vo1 power supply. The source (S) terminal of MOSFET Q4 is connected to ground SGND. The gate (G) terminal of MOSFET Q4 is connected to the Q4 driving circuit. The drain (D) terminal of MOSFET Q4 is connected to the second terminal of capacitor C4.

5. A multi-channel power supply and signal transmission circuit based on transformer isolation according to claim 4, characterized in that, The power control module also includes MOSFET Q2, capacitor C2, MOSFET Q3, Q2 drive circuit and Q3 drive circuit; The drain (D) terminal of MOSFET Q2 is connected to the drain (D) terminal of MOSFET Q1. The source (S) terminal of MOSFET Q2 is connected to the first terminal of capacitor C2 and the drain (D) terminal of MOSFET Q4, and outputs the Vo2 power supply. The gate (G) terminal of MOSFET Q2 is connected to the output terminal of the Q2 driving circuit. The input terminal of the Q2 driving circuit is connected to the second terminal of capacitor C2 and the cathode of diode D2. The source (S) terminal of MOSFET Q3 is connected to ground SGND. The drain (D) terminal of MOSFET Q3 is connected to the source (S) terminal of MOSFET Q1. The gate (G) terminal of MOSFET Q3 is connected to the Q3 driving circuit.

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