CN211603503U - IC module open circuit or short circuit detection device - Google Patents

Abstract

The utility model relates to a IC module is opened a way or short circuit detection device, the positive pole of emitting diode L1 is connected to the middle-end of two-way switch s1a of detection device's detection circuitry, and P1 end is connected to two-way switch s1 a's first dead end, and two-way switch s1 a's second dead end connecting resistance R1's first end, resistance R1's second end is connected the first end of drawing forth; the middle end of the bidirectional switch s1b is connected with the cathode of the light emitting diode L1, the first dead end of the bidirectional switch s1b is connected with the P1 end, and the second dead end of the bidirectional switch s1b is connected with the first end of the resistor R1; the anode of the light emitting diode L2 is connected to the P2 terminal, the cathode of the light emitting diode L2 is connected to the first terminal of the resistor R2, and the second terminal of the resistor R2 is connected to the second leading-out terminal. The utility model discloses whether can not only be used for detecting the encapsulation part of IC module and open a way, can also be used for detecting whether the connector part of IC module short circuit reduces the detection cost.

Description

IC module open circuit or short circuit detection device

Technical Field

The utility model belongs to the technical field of the IC module detection technique and specifically relates to an open circuit of IC module or short circuit detection device.

Background

As shown in fig. 1, when an excessive positive voltage or a negative voltage suddenly appears at an input pin and an output pin of an IC module, charges at the IC pins are discharged through a loop 1 and a loop 2, so in order to protect internal circuits of the IC module, the IC module is usually provided with an ESD protection circuit, and an ESD diode is usually adopted in the ESD protection circuit. In order to ensure the normal operation of the IC module, it is necessary to detect whether the package portion is open and the connector portion is short, so that an effective and fast detection device needs to be designed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a whether IC module opens a way or short circuit detection device, whether the detection IC module that can be fast convenient has the open circuit condition or the short circuit condition.

The technical scheme adopted by the utility model for solving the technical problems is that the IC module open circuit or short circuit detection device is provided with a detection module, particularly a detection module comprising a plurality of groups of detection circuits, wherein the detection circuits comprise a light-emitting diode L1, a light-emitting diode L2, a two-way switch s1a, a two-way switch s1b, a resistor R1 and a resistor R2; the middle end of the bidirectional switch s1a is connected with the anode of the light emitting diode L1, the first dead end of the bidirectional switch s1a is connected with the P1 end, the second dead end of the bidirectional switch s1a is connected with the first end of the resistor R1, and the second end of the resistor R1 is connected with the first leading-out end; the middle end of the bidirectional switch s1b is connected with the cathode of the light emitting diode L1, the first dead end of the bidirectional switch s1b is connected with the P1 end, and the second dead end of the bidirectional switch s1b is connected with the first end of the resistor R1; the anode of the light emitting diode L2 is connected to the P2 terminal, the cathode of the light emitting diode L2 is connected to the first terminal of the resistor R2, and the second terminal of the resistor R2 is connected to the second leading-out terminal.

Further, the IC module is provided with a packaging part, the packaging part comprises a plurality of PORT pins, corresponding protection circuits are connected to the PORT pins, each protection circuit comprises a diode D1, the anode of the diode D1 is connected to the PORT pins, and the cathode of the diode D1 is connected with a VDD terminal.

When the detection module is adopted to detect whether the packaging part of the IC module is open-circuited or not, the switch of the bidirectional switch s1a is switched to the first empty end to enable the middle end of the bidirectional switch s1a to be communicated with the P1 end, the switch of the bidirectional switch s1b is switched to the second empty end to enable the middle end of the bidirectional switch s1b to be communicated with the resistor R1, and the first leading-out end is connected with the PORT pin.

Further, the IC module has a connector portion including a plurality of PIN PINs;

when the detection module is used for detecting whether the connector part of the IC module is short-circuited or not, the switch of the bidirectional switch s1a is opened to the second vacant end so that the middle end of the bidirectional switch s1a is communicated with the resistor R1, and the switch of the bidirectional switch s1b is opened to the first vacant end so that the middle end of the bidirectional switch s1b is communicated with the P1 end; the first leading-out end is connected with the PIN PIN, and the second leading-out end is connected with the other PIN PIN.

The detection method for detecting whether the packaging part of the IC module is open or not by utilizing the IC module open or short detection device comprises the following steps:

the IC module is provided with a packaging part, the packaging part comprises a plurality of PORT pins, the PORT pins are connected with corresponding protection circuits, the protection circuits comprise diodes D1, the anode of a diode D1 is connected to the PORT pins, and the cathode of the diode D1 is connected with a VDD end;

the detection method specifically comprises the following steps:

step 1: the first terminal is connected with a PORT pin, the switch of the bidirectional switch s1a is opened to the first dead end, so that the middle end of the bidirectional switch s1a is communicated with the P1 end, and the switch of the bidirectional switch s1b is opened to the second dead end, so that the middle end of the bidirectional switch s1b is communicated with the resistor R1;

step 2: adding a positive target voltage larger than the voltage of VDD at the P1 end;

and step 3: if the light-emitting diode L1 is bright, the packaged part connected with the PORT pin is normal; if the led L1 is not lit, it indicates that the portion of the package connected to the PORT pin is open.

The detection method for detecting whether the connector part of the IC module is short-circuited by using the IC module open-circuit or short-circuit detection device comprises the following steps:

the IC module has a connector portion comprising a plurality of PIN PINs;

the detection method specifically comprises the following steps:

step 1: the first leading-out end is connected with the PIN PIN, and the second leading-out end is connected with the other PIN PIN; the switch of the bidirectional switch s1a is opened to the second dead end to enable the middle end of the bidirectional switch s1a to be communicated with the resistor R1, and the switch of the bidirectional switch s1b is opened to the first dead end to enable the middle end of the bidirectional switch s1b to be communicated with the P1 end;

step 2: adding a positive target voltage at the P1 end, and adding a positive target voltage larger than the voltage at the P1 end at the P2 end;

and step 3: if the light emitting diode L1 and the light emitting diode L2 are on, the short circuit between the PIN PIN of the connector part of the IC module and the other PIN PIN is indicated;

if the light emitting diodes L1 and L2 are not lighted, it indicates that there is no short circuit between the PIN PIN and another PIN PIN of the connector portion of the IC module.

The utility model has the advantages that: by adopting the detection device, the number of pins of the IC module is not limited, and the IC module with a small number of pins or a large number of pins can be supported. And whether can be used for detecting the encapsulation part of IC module and open a way, can also be used for detecting whether the connector part of IC module is short circuit, reduce the detection cost, also can show shorten detection time, improve the production efficiency of IC module.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is a partial schematic diagram of an IC module with ESD protection circuitry;

FIG. 2 is a schematic diagram of the connection between the IC module and the inspection apparatus;

FIG. 3 is a schematic diagram of the connection between the detection circuit and the IC module when detecting whether the package of the IC module is open;

FIG. 4 is an equivalent circuit diagram of the detection circuit connected to the IC module when detecting whether the packaged portion of the IC module is open;

FIG. 5 is a flow chart of the detection process for detecting whether the package portion of the IC module is open;

FIG. 6 is a schematic diagram showing the connection of the detection circuit to the IC module when detecting whether the connector portion of the IC module is short-circuited;

fig. 7 is an equivalent circuit diagram of the connection of the detection circuit and the IC module when detecting whether the connector portion of the IC module is short-circuited;

fig. 8 is a detection flowchart when detecting whether or not the connector section of the IC module is short-circuited;

FIG. 9 is a schematic block diagram of a detection system using the open circuit or short circuit detection device of the IC module;

FIG. 10 is a flow chart of the detection system performing the detection;

Detailed Description

The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 2, the IC module has a package portion, the package portion includes a plurality of PORT pins, the PORT pins are connected with corresponding protection circuits, the protection circuits include a diode D1, an anode of a diode D1 is connected to the PORT pins, and a cathode of the diode D1 is connected to a VDD terminal; the IC module has a connector portion that includes a plurality of PIN PINs.

The implementation mode is as follows: an IC module open circuit or short circuit detection device is provided with a detection module, wherein the detection module comprises a plurality of groups of detection circuits, and the detection circuits comprise a light-emitting diode L1, a light-emitting diode L2, a bidirectional switch s1a, a bidirectional switch s1b, a resistor R1 and a resistor R2; the middle end of the bidirectional switch s1a is connected with the anode of the light emitting diode L1, the first dead end of the bidirectional switch s1a is connected with the P1 end, the second dead end of the bidirectional switch s1a is connected with the first end of the resistor R1, and the second end of the resistor R1 is connected with the first leading-out end; the middle end of the bidirectional switch s1b is connected with the cathode of the light emitting diode L1, the first dead end of the bidirectional switch s1b is connected with the P1 end, and the second dead end of the bidirectional switch s1b is connected with the first end of the resistor R1; the anode of the light emitting diode L2 is connected to the P2 terminal, the cathode of the light emitting diode L2 is connected to the first terminal of the resistor R2, and the second terminal of the resistor R2 is connected to the second leading-out terminal.

As shown in fig. 3, when the detection module is used to detect whether the package portion of the IC module is open, the connection between the detection circuit and the IC module is schematically illustrated, and fig. 4 is an equivalent schematic diagram after connection according to fig. 3; as indicated by the thick black line in fig. 3, the switch of the bidirectional switch s1a is opened to the first dead end to connect the middle terminal of the bidirectional switch s1a with the terminal P1, the switch of the bidirectional switch s1b is opened to the second dead end to connect the middle terminal of the bidirectional switch s1b with the resistor R1, and the first terminal is connected to the PORT pin.

Fig. 5 shows a flowchart of the steps of detecting whether the package portion of the IC module is open by using the detection module.

The detection method specifically comprises the following steps:

step 1: the first leading-out terminal is connected with a PORT pin. For example, whether the PORT _1 pin is open or not is detected, and the first terminal is connected to the PORT _1 pin.

The switch of the bidirectional switch s1a is opened to the first dead end to make the middle end of the bidirectional switch s1a communicate with the P1 end, and the switch of the bidirectional switch s1b is opened to the second dead end to make the middle end of the bidirectional switch s1b communicate with the resistor R1;

step 2: a positive target voltage greater than the voltage at VDD is applied to terminal P1, for example, a voltage of 10V is applied to terminal P1. As shown in fig. 4, the terminal P1 and the terminal VDD form a power source, and the power source, the led L1, the resistor R1 and the diode D1 form a loop.

And step 3: if the led L1 is bright, it indicates that a current is generated in the loop and flows through the led L1, thus indicating that the package portion connected to the PORT _1 pin is normal; if the led L1 is not lit, it indicates that there is no current flowing through the led L1 in the loop, and therefore indicates that the portion of the package connected to the PORT _1 pin is open.

Then, other PORT pins of the IC module are sequentially detected according to the above method.

As shown in fig. 6, when the detection module is used to detect whether the connector portion of the IC module is short-circuited, the detection circuit is connected to the IC module, and fig. 7 is an equivalent schematic diagram after connection according to fig. 6; as indicated by the thick black line in fig. 6, the switch of the bidirectional switch s1a is opened to the second dead end so that the middle terminal of the bidirectional switch s1a is communicated with the resistor R1, and the switch of the bidirectional switch s1b is opened to the first dead end so that the middle terminal of the bidirectional switch s1b is communicated with the P1 terminal; the first leading-out end is connected with the PIN PIN, and the second leading-out end is connected with the other PIN PIN.

Fig. 8 is a flowchart of the steps of detecting whether the connector of the IC module is short-circuited by using the detection module.

The detection method specifically comprises the following steps:

step 1: the first leading-out end is connected with the PIN PIN, and the second leading-out end is connected with the other PIN PIN. For example, whether a PIN PIN _1 and a PIN PIN _2 are short-circuited is detected, the first leading-out terminal is connected with the PIN PIN _1, and the second leading-out terminal is connected with the PIN PIN _ 2.

The switch of the bidirectional switch s1a is opened to the second dead end to make the middle end of the bidirectional switch s1a communicate with the resistor R1, and the switch of the bidirectional switch s1b is opened to the first dead end to make the middle end of the bidirectional switch s1b communicate with the P1.

Step 2: adding a positive target voltage at the P1 end, such as 2V at the P1 end, and adding a positive target voltage larger than the voltage at the P1 end at the P2 end; such as a voltage of 6V at the P2 terminal. As shown in fig. 7, the P2 terminal at the P1 terminal forms a power supply, and the power supply, the led L2, the resistor R2, the resistor R1 and the led L1 form a loop.

And step 3: if the light emitting diodes L1 and L2 are on, the circuit is indicated to generate current and the current flows through the light emitting diodes L2 and L1, and therefore the short circuit between PIN _1 and PIN _2 of the connector part of the IC module is indicated;

if the light emitting diodes L1 and L2 are not lit, it means that no current flows through the light emitting diodes L2 and L1 in the above-mentioned circuit, and thus it means that there is no short circuit between PIN _1 and PIN _2 of the connector portion of the IC module.

And then sequentially detecting other pin pins of the IC module according to the method.

By adopting the detection device and the detection method, the number of pins of the IC module is not limited, and the IC module with a small number of pins or a large number of pins can be supported. And whether can be used for detecting the encapsulation part of IC module and open a way, can also be used for detecting whether the connector part of IC module is short circuit, reduce the detection cost, also can show shorten detection time, improve the production efficiency of IC module.

The detection module can be powered by an internal power supply, and can also be powered by an external power supply when the test pins are too many and the current load is large.

When the detection module is powered by an internal power supply, if the power supply generation module is adopted for supplying power. The bidirectional switch s1a and the bidirectional switch s1b in the detection module may be switched by the LED switch control unit.

As shown in fig. 9, the detection system is formed by an external operation unit, an IC module open or short detection device, and an IC module. The system is provided with an MCU control module, a power generation module and a detection module. The MCU control module comprises a power supply control unit and a switch control unit. The switch control unit comprises a power switch control unit and an LED switch control unit.

A flow chart of the detection system shown in fig. 10.

The user sets corresponding power supply information and switch information through the operation unit, the corresponding power supply information and the switch information are transmitted to the MCU control module through the interface, and the operation unit provides an internal power supply to the power supply generation module.

And the MCU control module performs data analysis on the acquired power supply information and the acquired switch information and outputs a power supply control signal and a switch control signal.

And the power supply control unit acts on the power supply generation module according to the power supply control signal and configures the output voltage value of the power supply generation module. The switch control signal is divided into two parts, namely a power switch control signal, the power switch control unit controls the on-off state of the power generation module, and the LED switch control signal, the LED switch control unit controls the detection direction of the detection module, namely, the detection of the packaging part or the detection of the connector part is selected.

The power generation module converts the input voltage into a target voltage through the internal processing module according to the power control signal and outputs the target voltage to the detection module. The power generation module includes a DC-DC module and a regulator module.

The detection module performs corresponding switching according to the switch control signal, namely selects the packaging part to detect or selects the connector part to detect, and is correspondingly connected with the IC module to finish detection. And finally, judging the detection result according to the states of the light-emitting diodes L1 and L2.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (3)

1. An IC module open circuit or short circuit detection device is characterized in that: the detection module comprises a plurality of groups of detection circuits, wherein each detection circuit comprises a light emitting diode L1, a light emitting diode L2, a bidirectional switch s1a, a bidirectional switch s1b, a resistor R1 and a resistor R2; the middle end of the bidirectional switch s1a is connected with the anode of the light emitting diode L1, the first dead end of the bidirectional switch s1a is connected with the P1 end, the second dead end of the bidirectional switch s1a is connected with the first end of the resistor R1, and the second end of the resistor R1 is connected with the first leading-out end; the middle end of the bidirectional switch s1b is connected with the cathode of the light emitting diode L1, the first dead end of the bidirectional switch s1b is connected with the P1 end, and the second dead end of the bidirectional switch s1b is connected with the first end of the resistor R1; the anode of the light emitting diode L2 is connected to the P2 terminal, the cathode of the light emitting diode L2 is connected to the first terminal of the resistor R2, and the second terminal of the resistor R2 is connected to the second leading-out terminal.

2. The device of claim 1, wherein the IC module comprises: the IC module is provided with a packaging part, the packaging part comprises a plurality of PORT pins, the PORT pins are connected with corresponding protection circuits, the protection circuits comprise diodes D1, the anode of a diode D1 is connected to the PORT pins, and the cathode of the diode D1 is connected with a VDD end;

when the detection module is adopted to detect whether the packaging part of the IC module is open-circuited or not, the switch of the bidirectional switch s1a is switched to the first empty end to enable the middle end of the bidirectional switch s1a to be communicated with the P1 end, the switch of the bidirectional switch s1b is switched to the second empty end to enable the middle end of the bidirectional switch s1b to be communicated with the resistor R1, and the first leading-out end is connected with the PORT pin.

3. The device of claim 1, wherein the IC module comprises: the IC module has a connector portion comprising a plurality of PIN PINs;

when the detection module is used for detecting whether the connector part of the IC module is short-circuited or not, the switch of the bidirectional switch s1a is opened to the second vacant end so that the middle end of the bidirectional switch s1a is communicated with the resistor R1, and the switch of the bidirectional switch s1b is opened to the first vacant end so that the middle end of the bidirectional switch s1b is communicated with the P1 end; the first leading-out end is connected with the PIN PIN, and the second leading-out end is connected with the other PIN PIN.

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