Optocoupler function verification test board

Abstract

The utility model relates to the field of photoelectric coupler function verification test technology discloses a photoelectric coupler function verification test board, including main body printed board and the support structure connected with main body printed board one side, be provided with test circuit on the main body printed board, test circuit includes power end, ground terminal, the test branch and the capacitor parallel in power end and the ground terminal between test circuit of the power end, test branch includes resistance, emitting diode, straight -in socket, is used for realizing the on-off light change under the resistance change condition after photoelectric coupler inserts straight -in socket. Through photoelectric coupler function verification test board, can observe the on-off light change under the resistance change condition after photoelectric coupler inserts straight -in socket, to realize the verification test to photoelectric coupler function, through the adjustment test board on the sliding rheostat, observes the luminous tube brightness change.

Description

Technical Field

[0001] This utility model relates to the field of functional verification and testing technology for optocouplers, and in particular to a functional verification and testing board for optocouplers. Background Technology

[0002] There are two main problems in the power-on verification of optocoupler functions. First, when power-on monitoring is required, flying wires need to be installed between the device pins, which is time-consuming and labor-intensive. In particular, if the pins are dense and the contact area is small, the root of the flying wire is prone to detachment due to stress, which often reduces the efficiency of the analysis process. Second, sometimes multiple devices need to be monitored simultaneously during the test, which can lead to series and parallel connections of a certain pin during the wiring process. This makes the wiring complex and poses a risk of short-circuiting with other pins, lacking convenience.

[0003] In the process of failure analysis of optocouplers, it is often difficult to determine whether the problem is with the input or output of the device, except when there is obvious leakage, short circuit or open circuit at the device port. Moreover, when there are multiple optocouplers, it is even more difficult to locate the fault of a certain channel. If the input and output can be disconnected on the functional test board or a specific channel of the optocoupler can be disconnected, the specific failure location can be located more quickly, and whether it is the input or the output. Utility Model Content

[0004] To address existing problems, this utility model provides a functional verification test board for optocouplers, aiming to solve the problems of power-on function verification and failure analysis and fault location of optocouplers. This will help technicians improve their power-on function verification capabilities, increase failure analysis efficiency, and reduce process risks.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A functional verification test board for an optocoupler includes a main printed circuit board and a support structure connected to one side of the main printed circuit board. A test circuit is provided on the main printed circuit board. The test circuit includes a power supply terminal, a ground terminal, a test branch connected in parallel between the power supply terminal and the ground terminal of the test circuit, and a capacitor. The test branch includes a resistor, a light-emitting diode, and a through-hole socket, used to realize the change of light emission under varying resistance conditions after the optocoupler is inserted into the through-hole socket.

[0007] As a further improvement of this utility model, the test branch includes several branches, each branch is connected to a light-emitting diode and a pair of sockets in a direct-plug socket, the pair of sockets in the direct-plug socket corresponding to one of the single-channel optocouplers or one of the multi-channel optocouplers.

[0008] As a further improvement of this utility model, the test branch also includes a pin and a jumper cap for temporarily disconnecting the connection between the branch and the test branch.

[0009] As a further improvement of this utility model, the main printed circuit board is provided with a placement slot that cooperates with the jumper cap.

[0010] As a further improvement of this utility model, the test branch also includes a sliding rheostat.

[0011] As a further improvement of this utility model, the maximum resistance of the sliding rheostat is 4.6KΩ.

[0012] As a further improvement of this utility model, there are multiple light-emitting diodes connected in series.

[0013] As a further improvement of this utility model, the direct-plug socket is a 32-wire dual-row direct-plug socket.

[0014] As a further improvement of this utility model, the power supply terminal includes at least two wiring ports.

[0015] As a further improvement of this utility model, the grounding terminal includes at least two wiring ports.

[0016] This utility model has the following beneficial effects: The optocoupler functional verification test board allows for the observation of the optocoupler's on / off light emission changes under variable resistance conditions after it is inserted into a through socket, thus enabling the verification test of the optocoupler's function. By adjusting the sliding rheostat on the test board, the brightness change of the light-emitting diode can be observed, solving the problems of power-on function verification and failure analysis fault location of optocouplers. This is beneficial for technicians to improve their power-on function verification capabilities, increase failure analysis efficiency, and reduce process risks.

[0017] Preferably, the test branch is configured with several branches, each corresponding to one of the single or multiple optocouplers, allowing for simultaneous functional verification testing of multiple optocouplers or a single optocoupler. Through the test branches, the input and output electrical signals of each channel are monitored in real time, saving time spent on wire-flying tests during failure analysis. This solves the difficulty of verifying the function of a specific channel of a device during failure analysis and provides technical support for further fault location after chip decapping, improving testing efficiency and relevance.

[0018] Preferably, the connection between the branch line and the test branch can be temporarily switched on and off using pins and jumpers, which facilitates precise monitoring of each input and output of the optocoupler according to test requirements. The jumper cap isolates the input and output, allowing for individual power-on monitoring of the input or output status. In addition, when analyzing multiple optocouplers, if it is unclear which specific branch has failed, the jumper cap can be used to disconnect the branch that does not need to be monitored, and the others can be monitored individually to verify the specific failure.

[0019] Preferably, the main printed circuit board is provided with a placement slot that matches the jumper cap, which facilitates the placement and retrieval of the jumper cap, making the testing operation more convenient and orderly, and preventing the jumper cap from being lost or improperly placed and affecting the test.

[0020] Preferably, a sliding rheostat is added to the test branch, which allows for more flexible adjustment of the resistance value in the test circuit, thereby enabling a more comprehensive and accurate test of the optocoupler's operation under variable resistance conditions and improving the accuracy of the test.

[0021] Preferably, the maximum resistance of the sliding rheostat is 4.6KΩ, which can meet the voltage division requirements of the test connection of various types of optocouplers, limit the input current in the circuit, and provide good protection for the devices and test board; at the same time, the sliding rheostat has a large adjustable resistance range, which meets the test requirements of a wide voltage transformation range.

[0022] Preferably, multiple light-emitting diodes are connected in series and emit light simultaneously, which is more intuitive and easier to observe.

[0023] Preferably, a 32-line dual in-line socket is used, which can be adapted to optocouplers with various package types, expanding the applicability of the test board and improving its versatility.

[0024] Preferably, the power supply end includes at least two wiring ports to meet different power connection requirements, such as connecting to power supplies of different voltages or types, providing a more flexible power access method for testing.

[0025] Optionally, the grounding terminal includes at least two wiring ports, which can provide a more stable and reliable grounding connection. The appropriate grounding method can be selected according to the test environment and equipment requirements, reducing grounding interference and improving the accuracy of the test. Attached Figure Description

[0026] The accompanying drawings described herein are for illustrative purposes only and do not limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a front view of a functional verification test board for an optocoupler device as described in Example 1. Figure 2 This is a reverse side view of the optical coupler device functional verification test board described in Example 1; Figure 3 This is a schematic diagram of the test circuit of a functional verification test board for an optocoupler device as described in Example 1; The components include: 1. Main printed circuit board; 2. Support structure; 3. Power supply terminal; 4. Grounding terminal; 5. Capacitor; 6. Light-emitting diode; 7. Through-hole socket; 8. Pin; 9. Jumper cap; 10. Sliding rheostat. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0029] Unless otherwise defined below, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Example 1 like Figure 1 and Figure 2 As shown, a functional verification test board for an optocoupler includes a main printed circuit board 1 and a support structure 2 connected to one side of the main printed circuit board 1. A test circuit is provided on the main printed circuit board 1. The test circuit includes a power supply terminal 3, a ground terminal 4, a test branch connected in parallel between the power supply terminal 3 and the ground terminal 4, and a capacitor 5. The test branch includes a resistor, a light-emitting diode 6, and a through socket 7, which are used to realize the change of light emission under varying resistance conditions after the optocoupler is inserted into the through socket 7.

[0031] Specifically, such as Figure 2 As shown, the support structure 2 consists of four legs, which are connected to the main printed circuit board 1 by threads.

[0032] The test branch includes several branches, each branch is connected to a light-emitting diode 6 and a pair of sockets in a through-hole socket 7, the pair of sockets in the through-hole socket 7 corresponding to one of the single-channel optocouplers or one of the multi-channel optocouplers.

[0033] Specifically, such as Figure 3 As shown, there is a sliding rheostat 10 (R in the figure). p The following components are included: resistors (R2 and R3 in the diagram), capacitors (C1 and C2 in the diagram), optocoupler (IC in the diagram), LED (LED in the diagram), power supply terminal 3 (VCC in the diagram), and ground terminal 4 (GND in the diagram). A sliding rheostat 10 (R... p After being connected in series with resistor (R2), one end is connected to the relevant pin of the optocoupler (IC), and the other end is connected to ground terminal 4 (GND) through a line, which is used to adjust the signal input to the IC, etc.

[0034] like Figure 3 As shown, the optocoupler (IC) contains multiple light-emitting diodes (6) (multiple diodes with arrows on the left in the figure) and phototransistors (multiple transistor-like structures on the right in the figure). These internal devices work together to realize optoelectronic functions.

[0035] like Figure 3 As shown, one end of resistor (R3) is connected to the pin of the optocoupler (IC), and the other end is connected to power supply terminal 3 (VCC) to limit current.

[0036] like Figure 3 As shown, capacitors 5 (C1) and 5 (C2) are connected in parallel, with one end connected to power supply terminal 3 (VCC) and the other end connected to ground terminal 4 (GND). They are mainly used for power supply filtering and stabilizing the power supply voltage.

[0037] like Figure 3 As shown, one end of the light-emitting diode 6 (LED) is connected to the pin of the optocoupler (IC), and the other end is connected to the ground terminal 4 (GND) to indicate the relevant status.

[0038] like Figure 3 As shown, power supply terminal 3 (VCC) provides the operating voltage for the entire circuit, and ground terminal 4 (GND) provides the reference ground potential for the circuit. All components form a complete working loop through their connection with power supply terminal 3 (VCC) and ground terminal 4 (GND).

[0039] Each branch line can monitor the input and output electrical signals of each channel in real time, saving time spent on jumper wires in failure analysis, solving the difficulty of verifying the function of a specific channel of a device during failure analysis, and providing technical support for further failure point location of the chip after the cap is removed. In failure analysis and fault location, if it is necessary to verify the input or output function separately, the input and output can be isolated using jumper caps, and the status of the input or output can be monitored separately. Additionally, when analyzing multiple optocouplers, if it is unclear which specific channel is failing, jumper caps can be used to disconnect the channel that does not need to be monitored, and the other channels can be monitored separately to verify the specific failure condition.

[0040] The test branch also includes pins 8 and jumper caps 9, used to temporarily disconnect the connection between the branch line and the test branch. Multiple pins 8 pre-installed on the test board can be connected to relevant test equipment, facilitating accurate monitoring of each input and output.

[0041] The test circuit also includes a sliding rheostat 10. Specifically, the sliding rheostat 10 is located on the reverse edge of the main printed circuit board 1, with a maximum resistance of 4.6KΩ. By adjusting the sliding rheostat 10 on the test board, the brightness change of the LED is observed. The sliding rheostat 10 has a maximum resistance of 4.6KΩ, a wide adjustable range, which limits the input current in the circuit, providing good protection for the device and the test board. Furthermore, the side-mounted structure of the sliding rheostat 10 makes it convenient to adjust the resistance, reduces the risk of misoperation, and does not occupy space on the front of the test board.

[0042] There are multiple light-emitting diodes 6, which are connected in series. The three light-emitting diodes 6 connected in series provide a more intuitive way to observe changes in light intensity when verifying the function of the optocoupler.

[0043] The through-hole socket 7 is a 32-wire dual in-line socket. The general-purpose functional verification test board in this embodiment uses a general-purpose dual in-line socket, and through various types of adapter sockets, it solves the functional verification of almost all optocouplers during failure analysis.

[0044] The power supply terminal 3 includes at least two wiring ports.

[0045] The grounding terminal 4 includes at least two wiring ports.

[0046] Tests have shown that this general-purpose functional verification test board is safe, reliable, convenient, and efficient in use. It achieves integration of the test board and is applicable to manual functional verification and failure analysis and fault location of optocouplers in almost any package form.

[0047] Example 2 The difference between this embodiment and Embodiment 1 is that: 1) The main printed circuit board 1 is provided with a placement slot that cooperates with the jumper cap 9.

[0048] The test board integrates a jumper cap storage location, which can be removed from the test board when using jumper caps. They can be used directly as needed for testing, demonstrating the test board's integration, convenience, and practicality.

[0049] Advantages of this utility model: 1. The test board is designed with a sliding rheostat 10 with a maximum resistance of 4.6KΩ. The resistance can be adjusted over a wide range, which limits the input current in the circuit and provides good protection for the device and the test board. In addition, the side-mounted structure of the sliding rheostat 10 makes it easy to adjust the resistance, reduces the risk of misoperation, and does not occupy the space on the front of the printed circuit board.

[0050] 2. In failure analysis, if it is necessary to verify the input or output function separately, the input and output can be isolated by using a jumper cap, and the status of the input or output can be monitored by powering on separately. In addition, when analyzing multiple optocouplers, if it is unclear which specific one has failed, a jumper cap can be used to disconnect the one that does not need to be monitored, and the others can be monitored by powering on separately to verify the specific failure situation.

[0051] 3. The multiple pins 8 reserved on the test board can be connected to relevant test equipment, providing convenience for accurate monitoring of each input and output.

[0052] 4. The 32-wire wide-body dual in-line socket on the test board can be used to connect optocouplers of all package types via an adapter board.

[0053] 5. The three LEDs connected in series in the output stage of the test board provide a more intuitive way to verify the function of the optocoupler and observe changes in brightness.

[0054] 6. The test board has a reserved space for jumper caps. When using jumper caps, they can be removed from the test board and used directly as needed, which reflects the integration, convenience and practicality of the test board.

[0055] The above embodiments are merely one of the implementation methods for achieving the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions, and other implementation methods that are easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A functional verification test board for an optocoupler device, characterized in that, The system includes a main printed circuit board (1) and a support structure (2) connected to one side of the main printed circuit board (1). A test circuit is provided on the main printed circuit board (1). The test circuit includes a power supply terminal (3), a ground terminal (4), a test branch connected in parallel between the power supply terminal (3) and the ground terminal (4) of the test circuit, and a capacitor (5). The test branch includes a resistor, a light-emitting diode (6), and a through socket (7) to realize the change of light emission under the variable resistance condition after the optocoupler is inserted into the through socket (7).

2. The optocoupler functional verification test board according to claim 1, characterized in that, The test branch includes several branches, each branch is connected to a light-emitting diode (6) and a pair of sockets in a direct-plug socket (7), the pair of sockets in the direct-plug socket (7) corresponding to one of the single-channel optocouplers or one of the multi-channel optocouplers.

3. The optocoupler functional verification test board according to claim 2, characterized in that, The test branch also includes a pin (8) and a jumper cap (9) for temporarily disconnecting the connection between the branch and the test branch.

4. The optocoupler functional verification test board according to claim 3, characterized in that, The main printed circuit board (1) is provided with a placement slot that cooperates with the jumper cap (9).

5. The optocoupler functional verification test board according to claim 1, characterized in that, The test branch also includes a sliding rheostat (10).

6. The optocoupler functional verification test board according to claim 5, characterized in that, The maximum resistance of the sliding rheostat (10) is 4.6KΩ.

7. The optocoupler functional verification test board according to claim 1, characterized in that, There are multiple light-emitting diodes (6), and the multiple light-emitting diodes (6) are connected in series.

8. The optocoupler functional verification test board according to claim 1, characterized in that, The plug-in socket (7) is a 32-wire dual-row plug-in socket (7).

9. The optocoupler functional verification test board according to claim 1, characterized in that, The power supply terminal (3) includes at least two wiring ports.

10. A functional verification test board for an optocoupler device according to claim 9, characterized in that, The grounding terminal (4) includes at least two wiring ports.

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