Power supply circuit for printed circuit board

Abstract

The utility model discloses a power supply circuit of printed circuit board relates to power supply technical field, including power module, access direct current energy, by mode control module control first voltage stabilizing module carries out voltage stabilizing regulation to direct current energy and provides adjustable voltage stabilizing for printed circuit board module, by second voltage stabilizing module provides adjustable voltage stabilizing for printed circuit board module, simultaneously mode control module still can change power supply passage, and then provides negative value electric energy for printed circuit board, for improving output voltage range, mode control module still can control voltage processing module to carry out superposition processing to the electric energy of first voltage stabilizing module and second voltage stabilizing module output. The utility model discloses a power supply circuit of printed circuit board can improve the voltage of input to printed circuit board module, satisfies the different power supply voltage demand of printed circuit board module.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, specifically to power supply circuits for printed circuit boards. Background Technology

[0002] Printed circuit boards (PCBs) are important electronic components. They serve as the support for electronic components and the carrier for their electrical interconnection. Due to the different types of PCBs, different types of PCBs require different power supply voltages, resulting in different power supply circuits. In the current technology, the power supply circuit of PCBs generally selects a specific DC-DC regulator according to the power supply type of the PCB. However, since the power supply range of DC-DC regulators is limited, the application range of the power supply circuit of PCBs is restricted, and therefore needs to be improved. Utility Model Content

[0003] This utility model provides a power supply circuit for a printed circuit board to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The power supply circuit of the printed circuit board includes: a power module, a first voltage regulator module, a second voltage regulator module, a mode control module, a voltage processing module, and a printed circuit board module.

[0006] The power module is used to connect to DC power.

[0007] The first voltage regulator module is connected to the power supply module and is used to regulate and adjust the DC power and output the first power.

[0008] The second voltage regulator module is connected to the power supply module and is used to regulate the DC power and output the second power.

[0009] The mode control module is connected to the first voltage regulator module and the power supply module. It is used to receive DC power, change the power supply path of the first voltage regulator module and provide negative power. When it is necessary to expand the output voltage, it controls the first voltage regulator module to perform voltage regulation and output control signals.

[0010] The voltage processing module is connected to the second voltage regulator module, the first voltage regulator module and the mode control module. It is used to receive and store the second electrical energy and, when a control signal is received, store the first electrical energy, and superimpose the stored first electrical energy with the second electrical energy to output the third electrical energy.

[0011] The printed circuit board module, connected to the voltage processing module, the second voltage regulation module, and the mode control module, is used to transmit first electrical energy, second electrical energy, third electrical energy, or negative electrical energy to the connected printed circuit board.

[0012] As a further embodiment of this utility model: the power supply module includes a power interface and a first capacitor; the first voltage regulator module includes a fifth capacitor, a first resistor, a second resistor, a first voltage regulator, a first diode, a first inductor, a third resistor, a first potentiometer, a fourth resistor, and a second capacitor;

[0013] Preferably, the first end of the power interface is connected to one end of the first capacitor and the first end of the first voltage regulator, and is connected to the fifth end of the first voltage regulator and one end of the second resistor in sequence through the fifth capacitor and the first resistor. The second end of the first voltage regulator is connected to the cathode of the first diode and is connected to one end of the third resistor and the first end of the second capacitor through the first resistor. The other end of the third resistor is connected to one end of the first potentiometer. The other end of the first potentiometer is connected to the anode of the first diode, the second end of the second capacitor, the other end of the second resistor, the third end of the first voltage regulator, the other end of the first capacitor, and the second end of the power interface through the fourth resistor. The slider end of the first potentiometer is connected to the fourth end of the first voltage regulator.

[0014] As a further embodiment of this utility model: the mode control module includes a second diode, a first relay switch, and a second relay switch; the printed circuit board module includes a printed circuit board interface;

[0015] Preferably, the first moving terminal of the first relay switch is connected to the first moving terminal of the second relay switch, the cathode of the second diode, and the first terminal of the second capacitor; the first stationary terminal of the second relay switch is connected to the second stationary terminal of the first relay switch and the first power supply terminal of the printed circuit board interface; the anode of the second diode is connected to the second moving terminal of the first relay switch, the second moving terminal of the second relay switch, and the second terminal of the second capacitor; the first stationary terminal of the first relay switch is connected to the second stationary terminal of the second relay switch, the ground terminal and the ground terminal of the printed circuit board interface; and the second power supply terminal of the printed circuit board is connected to the voltage processing module and the second voltage regulation module.

[0016] As a further improvement of this utility model: the second voltage regulator module includes a voltage regulation device and a third diode;

[0017] Preferably, the input terminal of the voltage regulator is connected to the first terminal of the power interface, the output terminal of the voltage regulator is connected to the anode of the third diode, the cathode of the third diode is connected to the second power terminal of the printed circuit board, and the ground terminal of the voltage regulator is grounded.

[0018] As a further embodiment of this utility model: the voltage processing module includes a third capacitor, a fourth capacitor, a first power transistor, and a second power transistor;

[0019] Preferably, one end of the third capacitor is connected to the anode of the third diode and connected to the drain of the first power transistor and the source of the second power transistor through the fourth capacitor. The source of the first power transistor is connected to the cathode of the third diode. The drain of the second power transistor is connected to the first end of the second capacitor. The other end of the third capacitor is connected to the ground terminal of the voltage regulator. The gate of the first power transistor is connected to the gate of the second power transistor and the mode control module.

[0020] As a further embodiment of this utility model, the mode control module also includes a fifth resistor, a fourth diode, a sixth resistor, a first push-button switch, a seventh resistor, a first switching transistor, an eighth resistor, a ninth resistor, a second push-button switch, a second switching transistor, a third switching transistor, a first relay, and a second relay.

[0021] Preferably, the cathode of the fourth diode is connected to one end of the sixth resistor, one end of the eighth resistor, one end of the first relay, and one end of the second relay, and is connected to the first end of the power interface through the fifth resistor. The other end of the sixth resistor is connected to the stationary end of the first push-button switch. The moving end of the first push-button switch is connected to the gate of the first power transistor and is connected to the base of the first switching transistor through the seventh resistor. The collector of the first switching transistor is connected to the stationary end of the second push-button switch and the other end of the eighth resistor. The other end of the second push-button switch is connected to the base of the second switching transistor and the base of the third switching transistor, and is connected to the emitter of the second switching transistor, the emitter of the third switching transistor, the emitter of the first switching transistor, the anode of the fourth diode, and the ground terminal through the ninth resistor. The collectors of the second switching transistor and the collectors of the third switching transistor are respectively connected to the other ends of the first relay and the second relay.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: The power supply circuit of the printed circuit board of this utility model can be controlled by the mode control module to provide adjustable voltage to the printed circuit board module by the first voltage regulator module and the second voltage regulator module. At the same time, the mode control module can also change the power supply path to provide negative power to the printed circuit board. In order to improve the output voltage range, the mode control module can also control the voltage processing module to superimpose the power output of the first voltage regulator module and the second voltage regulator module to increase the voltage input to the printed circuit board module and meet the different power supply voltage requirements of the printed circuit board module. Attached Figure Description

[0023] 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.

[0024] Figure 1A schematic block diagram of the power supply circuit of the printed circuit board provided in this utility model embodiment.

[0025] Figure 2 A circuit diagram of the power supply circuit of the printed circuit board provided in this utility model embodiment.

[0026] Figure 3 A connection circuit diagram of the mode control module provided for this utility model embodiment. Detailed Implementation

[0027] 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.

[0028] In one embodiment, see Figure 1 The power supply circuit of the printed circuit board includes: power module 1, first voltage regulator module 2, second voltage regulator module 3, mode control module 4, voltage processing module 5 and printed circuit board module 6.

[0029] Specifically, power module 1 is used to connect to DC power;

[0030] The first voltage regulator module 2 is connected to the power supply module 1 and is used to regulate the DC power and output the first power.

[0031] The second voltage regulator module 3 is connected to the power supply module 1 and is used to regulate the DC power and output the second power.

[0032] The mode control module 4 is connected to the first voltage regulator module 2 and the power supply module 1. It is used to receive DC power, change the power supply path of the first voltage regulator module 2 and provide negative power. When it is necessary to expand the output voltage, it controls the first voltage regulator module 2 to perform voltage regulation and output control signals.

[0033] The voltage processing module 5 is connected to the second voltage regulator module 3, the first voltage regulator module 2 and the mode control module 4. It is used to receive and store the second electrical energy and, when receiving a control signal, store the first electrical energy, superimpose the stored first electrical energy and the second electrical energy, and output the third electrical energy.

[0034] The printed circuit board module 6 is connected to the voltage processing module 5, the second voltage regulator module 3 and the mode control module 4, and is used to transmit the first electrical energy, the second electrical energy, the third electrical energy or the negative electrical energy to the connected printed circuit board.

[0035] In a specific embodiment, the power supply module 1 can be a power circuit composed of a power interface and a capacitor, which can be connected to DC power; the first voltage regulator module 2 can be a first voltage regulator circuit composed of a voltage regulator, resistor, capacitor, etc., which can perform voltage sampling and regulate the input power according to the sampling feedback signal; the second voltage regulator module 3 can be a second voltage regulator circuit composed of a voltage regulation device, which can perform voltage sampling and regulate the input power according to the sampling feedback signal; the mode control module 4 can be a mode control circuit composed of a push-button switch, transistor, relay, etc., which can control the power supply state of the first voltage regulator module 2 through the push-button switch, that is, provide positive voltage or negative voltage, and control the power superposition operation of the voltage processing module 5; the voltage processing module 5 can be a voltage processing circuit composed of a capacitor and a field-effect transistor, which can perform energy storage and filtering, and control the transmission and superposition of power; the printed circuit board module 6 can be a printed circuit board circuit composed of a printed circuit board interface, which is connected to the power supply terminal of the printed circuit board.

[0036] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 1 includes a power interface and a first capacitor C1; the first voltage regulator module 2 includes a fifth capacitor C5, a first resistor R1, a second resistor R2, a first voltage regulator IC1, a first diode D1, a first inductor L1, a third resistor R3, a first potentiometer RP1, a fourth resistor R4, and a second capacitor C2.

[0037] Specifically, the first end of the power interface is connected to one end of the first capacitor C1 and the first end of the first voltage regulator IC1, and is connected to the fifth end of the first voltage regulator IC1 and one end of the second resistor R2 in sequence through the fifth capacitor C5 and the first resistor R1. The second end of the first voltage regulator IC1 is connected to the cathode of the first diode D1 and is connected to one end of the third resistor R3 and the first end of the second capacitor C2 through the first resistor R1. The other end of the third resistor R3 is connected to one end of the first potentiometer RP1. The other end of the first potentiometer RP1 is connected to the anode of the first diode D1, the second end of the second capacitor C2, the other end of the second resistor R2, the third end of the first voltage regulator IC1, the other end of the first capacitor C1 and the second end of the power interface through the fourth resistor R4. The slider end of the first potentiometer RP1 is connected to the fourth end of the first voltage regulator IC1.

[0038] In a specific embodiment, the first voltage regulator IC1 can be selected as LM2596-ADJ, which uses the third resistor R3, the first potentiometer RP1 and the fourth resistor R4 to sample the voltage and provide feedback signals for the first voltage regulator IC1.

[0039] Furthermore, the mode control module 4 includes a second diode D2, a first relay switch K1-1, and a second relay switch K2-1; the printed circuit board module 6 includes a printed circuit board interface.

[0040] Specifically, the first moving terminal of the first relay switch K1-1 is connected to the first moving terminal of the second relay switch K2-1, the cathode of the second diode D2, and the first terminal of the second capacitor C2. The first stationary terminal of the second relay switch K2-1 is connected to the second stationary terminal of the first relay switch K1-1 and the first power supply terminal of the printed circuit board interface. The anode of the second diode D2 is connected to the second moving terminal of the first relay switch K1-1, the second moving terminal of the second relay switch K2-1, and the second terminal of the second capacitor C2. The first stationary terminal of the first relay switch K1-1 is connected to the second stationary terminal of the second relay switch K2-1, the ground terminal of the printed circuit board interface, and the ground terminal. The second power supply terminal of the printed circuit board is connected to the voltage processing module 5 and the second voltage regulator module 3.

[0041] In a specific embodiment, the first relay switch K1-1 can be a double-pole single-throw switch and is a normally open switch; the second relay switch K2-1 can be a double-pole single-throw switch and is a normally closed switch.

[0042] Furthermore, the second voltage regulator module 3 includes a voltage regulation device and a third diode D3;

[0043] Specifically, the input terminal of the voltage regulator is connected to the first terminal of the power interface, the output terminal of the voltage regulator is connected to the anode of the third diode D3, the cathode of the third diode D3 is connected to the second power terminal of the printed circuit board, and the ground terminal of the voltage regulator is grounded.

[0044] In a specific embodiment, the circuit structure of the voltage regulation device is the same as that of the fifth capacitor C5, the first resistor R1, the second resistor R2, the first voltage regulator IC1, the first diode D1, the first inductor L1, the third resistor R3, the first potentiometer RP1, the fourth resistor R4, and the second capacitor C2.

[0045] Furthermore, the voltage processing module 5 includes a third capacitor C3, a fourth capacitor C4, a first power transistor Q1, and a second power transistor Q2;

[0046] Specifically, one end of the third capacitor C3 is connected to the anode of the third diode D3 and is connected to the drain of the first power transistor Q1 and the source of the second power transistor Q2 through the fourth capacitor C4. The source of the first power transistor Q1 is connected to the cathode of the third diode D3. The drain of the second power transistor Q2 is connected to the first end of the second capacitor C2. The other end of the third capacitor C3 is connected to the ground terminal of the voltage regulator. The gate of the first power transistor Q1 is connected to the gate of the second power transistor Q2 and the mode control module 4.

[0047] In a specific embodiment, both the first power transistor Q1 and the second power transistor Q2 can be N-channel field-effect transistors.

[0048] Furthermore, the mode control module 4 also includes a fifth resistor R5, a fourth diode D4, a sixth resistor R6, a first push button switch S1, a seventh resistor R7, a first switching transistor V1, an eighth resistor R8, a ninth resistor R9, a second push button switch S2, a second switching transistor V2, a third switching transistor V3, a first relay K1, and a second relay K2.

[0049] Specifically, the cathode of the fourth diode D4 is connected to one end of the sixth resistor R6, one end of the eighth resistor R8, one end of the first relay K1, and one end of the second relay K2, and is connected to the first end of the power interface through the fifth resistor R5. The other end of the sixth resistor R6 is connected to the stationary end of the first push-button switch S1. The moving end of the first push-button switch S1 is connected to the gate of the first power transistor Q1 and is connected to the base of the first switching transistor V1 through the seventh resistor R7. The collector of the first switching transistor V1 is connected to the stationary end of the second push-button switch S2 and the other end of the eighth resistor R8. The other end of the second push-button switch S2 is connected to the base of the second switching transistor V2 and the base of the third switching transistor V3, and is connected to the emitter of the second switching transistor V2, the emitter of the third switching transistor V3, the emitter of the first switching transistor V1, the anode of the fourth diode D4, and the ground terminal through the ninth resistor R9. The collectors of the second switching transistor V2 and the third switching transistor V3 are respectively connected to the other ends of the first relay K1 and the second relay K2.

[0050] In a specific embodiment, the first switch V1, the second switch V2, and the third switch V3 can all be NPN transistors; the first relay K1 controls the first relay switch K1-1 to work by magnetic attraction, and the second relay K2 controls the second relay switch K2-1 to work by magnetic attraction.

[0051] In the power supply circuit of the printed circuit board in this embodiment, DC power is input through the power interface. The first capacitor C1 filters the DC power. The first voltage regulator IC1, in conjunction with the first inductor L1, the first diode D1, the second resistor R2, the first resistor R1, and the fifth capacitor C5, regulates the input DC power. The output power is sampled through the third resistor R3, the first potentiometer RP1, and the fourth resistor R4, providing a feedback signal to the fourth terminal of the first voltage regulator IC1. This allows the first voltage regulator IC1 to perform voltage regulation, which is transmitted via the second relay switch K2-1 to provide the first power supply terminal of the printed circuit board interface. Simultaneously, the voltage regulator device regulates the DC power, which is transmitted via the third diode D3, providing the second power supply terminal of the printed circuit board interface. When the second button switch S2 is pressed, the second switch V2 and the third switch V3 are turned on. The first relay K1 controls the first relay switch K1-1 to close, and the second relay K2 controls the second relay switch K2-1 to open. This causes the output first electrical energy to be reversed and transmitted to the first power terminal of the printed circuit board interface by the first relay switch K1-1. When the first button switch S1 is pressed, the first switch V1 is turned on, pulling down the potential of the base of the second switch V2 and the base of the third switch V3. This also controls the first power transistor Q1 and the second power transistor Q2 to turn on. The third capacitor C3 stores the second electrical energy, and the fourth capacitor C4 stores the first electrical energy and adds it to the electrical energy stored in the third capacitor C3. The output third electrical energy is then transmitted to the second power terminal of the printed circuit board interface through the first power transistor Q1.

[0052] 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.

[0053] 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 power supply circuit for a printed circuit board, characterized in that, The power supply circuit of the printed circuit board includes: a power module, a first voltage regulator module, a second voltage regulator module, a mode control module, a voltage processing module, and a printed circuit board module. The power module is used to connect to DC power. The first voltage regulator module is connected to the power supply module and is used to regulate and adjust the DC power and output the first power. The second voltage regulator module is connected to the power supply module and is used to regulate and adjust the DC power and output the second power. The mode control module is connected to the first voltage regulator module and the power supply module. It is used to receive DC power, change the power supply path of the first voltage regulator module and provide negative power. When it is necessary to expand the output voltage, it controls the first voltage regulator module to perform voltage regulation and output control signals. The voltage processing module is connected to the second voltage regulator module, the first voltage regulator module and the mode control module. It is used to receive and store the second electrical energy and, when a control signal is received, store the first electrical energy, and superimpose the stored first electrical energy with the second electrical energy to output the third electrical energy. The printed circuit board module is connected to the voltage processing module, the second voltage regulation module, and the mode control module, and is used to transmit first electrical energy, second electrical energy, third electrical energy, or negative electrical energy to the connected printed circuit board.

2. The power supply circuit of the printed circuit board according to claim 1, characterized in that, The power module includes a power interface and a first capacitor; the first voltage regulator module includes a fifth capacitor, a first resistor, a second resistor, a first voltage regulator, a first diode, a first inductor, a third resistor, a first potentiometer, a fourth resistor, and a second capacitor; The first end of the power interface is connected to one end of the first capacitor and the first end of the first voltage regulator, and is connected to the fifth end of the first voltage regulator and one end of the second resistor in sequence through the fifth capacitor and the first resistor. The second end of the first voltage regulator is connected to the cathode of the first diode and is connected to one end of the third resistor and the first end of the second capacitor through the first resistor. The other end of the third resistor is connected to one end of the first potentiometer. The other end of the first potentiometer is connected to the anode of the first diode, the second end of the second capacitor, the other end of the second resistor, the third end of the first voltage regulator, the other end of the first capacitor, and the second end of the power interface through the fourth resistor. The slider end of the first potentiometer is connected to the fourth end of the first voltage regulator.

3. The power supply circuit of the printed circuit board according to claim 2, characterized in that, The mode control module includes a second diode, a first relay switch, and a second relay switch; the printed circuit board module includes a printed circuit board interface. The first moving terminal of the first relay switch is connected to the first moving terminal of the second relay switch, the cathode of the second diode, and the first terminal of the second capacitor. The first stationary terminal of the second relay switch is connected to the second stationary terminal of the first relay switch and the first power supply terminal of the printed circuit board interface. The anode of the second diode is connected to the second moving terminal of the first relay switch, the second moving terminal of the second relay switch, and the second terminal of the second capacitor. The first stationary terminal of the first relay switch is connected to the second stationary terminal of the second relay switch, the ground terminal and the ground terminal of the printed circuit board interface. The second power supply terminal of the printed circuit board is connected to the voltage processing module and the second voltage regulation module.

4. The power supply circuit of the printed circuit board according to claim 3, characterized in that, The second voltage regulator module includes a voltage regulation device and a third diode; The input terminal of the voltage regulator is connected to the first terminal of the power interface, the output terminal of the voltage regulator is connected to the anode of the third diode, the cathode of the third diode is connected to the second power terminal of the printed circuit board, and the ground terminal of the voltage regulator is grounded.

5. The power supply circuit for the printed circuit board according to claim 4, characterized in that, The voltage processing module includes a third capacitor, a fourth capacitor, a first power transistor, and a second power transistor. One end of the third capacitor is connected to the anode of the third diode and is connected to the drain of the first power transistor and the source of the second power transistor through the fourth capacitor. The source of the first power transistor is connected to the cathode of the third diode. The drain of the second power transistor is connected to the first end of the second capacitor. The other end of the third capacitor is connected to the ground terminal of the voltage regulator. The gate of the first power transistor is connected to the gate of the second power transistor and the mode control module.

6. The power supply circuit for the printed circuit board according to claim 5, characterized in that, The mode control module also includes a fifth resistor, a fourth diode, a sixth resistor, a first push-button switch, a seventh resistor, a first switching transistor, an eighth resistor, a ninth resistor, a second push-button switch, a second switching transistor, a third switching transistor, a first relay, and a second relay. The cathode of the fourth diode is connected to one end of the sixth resistor, one end of the eighth resistor, one end of the first relay, and one end of the second relay, and is connected to the first end of the power interface through the fifth resistor. The other end of the sixth resistor is connected to the stationary end of the first push-button switch. The moving end of the first push-button switch is connected to the gate of the first power transistor and is connected to the base of the first switching transistor through the seventh resistor. The collector of the first switching transistor is connected to the stationary end of the second push-button switch and the other end of the eighth resistor. The other end of the second push-button switch is connected to the base of the second switching transistor and the base of the third switching transistor, and is connected to the emitter of the second switching transistor, the emitter of the third switching transistor, the emitter of the first switching transistor, the anode of the fourth diode, and the ground terminal through the ninth resistor. The collectors of the second switching transistor and the collectors of the third switching transistor are respectively connected to the other ends of the first relay and the second relay.

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