CN221378211U - IPM protection detection circuit - Google Patents
IPM protection detection circuit Download PDFInfo
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- CN221378211U CN221378211U CN202322436821.7U CN202322436821U CN221378211U CN 221378211 U CN221378211 U CN 221378211U CN 202322436821 U CN202322436821 U CN 202322436821U CN 221378211 U CN221378211 U CN 221378211U
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- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
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Abstract
The utility model discloses an IPM protection detection circuit, which relates to the field of IPM, and comprises: the voltage regulating module is used for providing voltage signals of a power supply, a working pin with an undervoltage detection function and a grounding end; the filtering processing module is used for filtering the voltage difference between the power supply and the working pin of the undervoltage detection function and outputting the filtered voltage difference to the protection detection module; the protection detection module is used for detecting the voltage difference between the power supply and the working pins of the undervoltage detection function to judge whether the power supply and the working pins of the undervoltage detection function are short-circuited or not, and the grounding leakage is carried out during the short circuit; the feedback prompt module is used for feeding back signals to the IPM during short circuit; compared with the prior art, the utility model has the beneficial effects that: according to the utility model, whether the working pin of the undervoltage detection function is short-circuited with the power supply or not is detected, so that the phenomenon that the voltage of the working pin of the undervoltage detection function is large during short-circuited is avoided, and undervoltage protection cannot be provided.
Description
Technical Field
The utility model relates to the field of IPM, in particular to an IPM protection detection circuit.
Background
The Intelligent Power Module (IPM) is an abbreviation of INTELLIGENT POWER MODULE, logic, control, detection and protection circuits are integrated in the IPM, the use is convenient, the volume and development time of the system are reduced, the reliability of the system is greatly enhanced, the intelligent power module is suitable for the development direction of the current power device, namely modularization, recombination and Power Integrated Circuit (PIC), and the intelligent power module is widely applied in the power electronics field.
At present, the protection detection circuit of the IPM does not detect whether a short circuit exists between a working pin with an undervoltage detection function of the IPM and a power supply, if the short circuit exists between the working pin and the power supply, the impedance of the whole circuit is reduced, so that the voltage output to the working pin with the undervoltage detection function is larger, the undervoltage cannot be detected during undervoltage, and improvement is needed.
Disclosure of utility model
The present utility model is directed to an IPM protection detection circuit, which solves the above-mentioned problems of the related art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
An IPM protection detection circuit, comprising:
The voltage regulating module is used for providing voltage signals of a power supply, a working pin with an undervoltage detection function and a grounding end;
The filtering processing module is used for filtering the voltage difference between the power supply and the working pin of the undervoltage detection function and outputting the filtered voltage difference to the protection detection module;
The protection detection module is used for detecting the voltage difference between the power supply and the working pins of the undervoltage detection function to judge whether the power supply and the working pins of the undervoltage detection function are short-circuited or not, and the grounding leakage is carried out during the short circuit;
the feedback prompt module is used for feeding back signals to the IPM during short circuit;
The voltage regulating module is connected with the filtering processing module and the feedback prompting module, and the filtering processing module is connected with the protection detection module.
As still further aspects of the utility model: the voltage regulation module comprises a resistor R1, a potentiometer RP1 and a resistor R2, wherein one end of the resistor R1 is connected with a power supply VCC, the other end of the resistor R1 is connected with one end of the potentiometer RP1, the other end of the potentiometer RP1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with a grounding end GND, and the sliding end of the potentiometer RP1 is connected with a working pin VDD and a common point G of an undervoltage detection function.
As still further aspects of the utility model: the filtering processing module comprises a capacitor C1, a capacitor C2 and a resistor R1, wherein one end of the resistor R1 is connected with one end of the capacitor C1, one end of the capacitor C2 and a power supply VCC, the other end of the capacitor C1 is connected with a common point G, the other end of the capacitor C2 is connected with the common point G, and the other end of the resistor R1 is connected with the common point G.
As still further aspects of the utility model: the protection detection module comprises a diode D1, a resistor R3, a MOS tube V1, a diode D2, a resistor R4, a diode D3 and a MOS tube V2, wherein the D pole of the MOS tube V1 is connected with the negative pole of the diode D1, a power supply VCC and the S pole of the MOS tube V2, the positive pole of the diode D1 is connected with one end of the resistor R3 and the G pole of the MOS tube V1, the other end of the resistor R3 is connected with the common point G, the S pole of the MOS tube V1 is connected with the negative pole of the diode D2, the positive pole of the diode D2 is connected with one end of the resistor R4 and the G pole of the MOS tube V2, the other end of the resistor R4 is connected with the positive pole of the diode D3, the negative pole of the diode D3 is connected with the grounding end GND, and the D pole of the MOS tube V2 is connected with the grounding end GND.
As still further aspects of the utility model: the feedback prompt module comprises a resistor R4, a capacitor C3, a capacitor C4 and a triode V3, wherein one end of the resistor R4 is connected with 5V voltage, the other end of the resistor R4 is connected with one end of the capacitor C3 and an emitter of the triode V3, the other end of the capacitor C3 is connected with a grounding end GND, a G pole of the triode V3 is connected with a common point G, a collector of the triode V3 is connected with one end and IPM of the capacitor C4, and the other end of the capacitor C4 is connected with the grounding end GND.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, whether the working pin of the undervoltage detection function is short-circuited with the power supply or not is detected, so that the phenomenon that the voltage of the working pin of the undervoltage detection function is large during short-circuited is avoided, and undervoltage protection cannot be provided.
Drawings
Fig. 1 is a schematic diagram of an IPM protection detection circuit.
Fig. 2 is a circuit diagram of the voltage adjusting module, the filtering processing module and the protection detecting module.
Fig. 3 is a circuit diagram of the feedback prompt module.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.
Referring to fig. 1, an IPM protection detection circuit includes:
The voltage regulating module is used for providing voltage signals of a power supply, a working pin with an undervoltage detection function and a grounding end;
The filtering processing module is used for filtering the voltage difference between the power supply and the working pin of the undervoltage detection function and outputting the filtered voltage difference to the protection detection module;
The protection detection module is used for detecting the voltage difference between the power supply and the working pins of the undervoltage detection function to judge whether the power supply and the working pins of the undervoltage detection function are short-circuited or not, and the grounding leakage is carried out during the short circuit;
the feedback prompt module is used for feeding back signals to the IPM during short circuit;
The voltage regulating module is connected with the filtering processing module and the feedback prompting module, and the filtering processing module is connected with the protection detection module.
In this embodiment: referring to fig. 2, the voltage adjusting module includes a resistor R1, a potentiometer RP1, and a resistor R2, wherein one end of the resistor R1 is connected to a power supply VCC, the other end of the resistor R1 is connected to one end of the potentiometer RP1, the other end of the potentiometer RP1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to a ground GND, and a sliding end of the potentiometer RP1 is connected to a working pin VDD of the undervoltage detection function and a common point G.
Three voltages are introduced, a power supply VCC, a working pin VDD for undervoltage detection, a ground GND, and a common point G is provided.
In this embodiment: referring to fig. 2, the filtering module includes a capacitor C1, a capacitor C2, and a resistor R1, wherein one end of the resistor R1 is connected to one end of the capacitor C1, one end of the capacitor C2, and a power supply VCC, the other end of the capacitor C1 is connected to a common point G, the other end of the capacitor C2 is connected to the common point G, and the other end of the resistor R1 is connected to the common point G.
The voltage is filtered by the capacitors C1, C2.
In this embodiment: referring to fig. 2, the protection detection module includes a diode D1, a resistor R3, a MOS tube V1, a diode D2, a resistor R4, a diode D3, a MOS tube V2, wherein the D pole of the MOS tube V1 is connected with the negative pole of the diode D1, a power supply VCC, and the S pole of the MOS tube V2, the positive pole of the diode D1 is connected with one end of the resistor R3, the G pole of the MOS tube V1, the other end of the resistor R3 is connected with the common point G, the S pole of the MOS tube V1 is connected with the negative pole of the diode D2, the positive pole of the diode D3 is connected with one end of the positive pole of the resistor R4, the G pole of the MOS tube V2, the negative pole of the diode D3 is connected with the ground terminal GND, and the D pole of the MOS tube V2 is connected with the ground terminal GND.
When the power supply VCC and the working pin VDD of the undervoltage detection function are not in short circuit, the voltage stabilizing diode D1 is conducted, the MOS tube V1 (NMOS) is conducted, the light emitting diode D3 emits light to indicate normal operation, meanwhile, the G of the MOS tube V2 (PMOS) is extremely high level, and the MOS tube V2 is not conducted;
When the power supply VCC and the working pin VDD of the undervoltage detection function are in short circuit, the voltage stabilizing diode D1 is not conducted, the MOS tube V1 is cut off, the G of the MOS tube V2 is extremely low level, the MOS tube V2 is conducted, and the power supply VCC is connected with the grounding end GND through the MOS tube V2, so that the grounding current limiting is realized.
In this embodiment: referring to fig. 3, the feedback prompt module includes a resistor R4, a capacitor C3, a capacitor C4, and a triode V3, wherein one end of the resistor R4 is connected to 5V voltage, the other end of the resistor R4 is connected to one end of the capacitor C3 and an emitter of the triode V3, the other end of the capacitor C3 is connected to a ground GND, a G pole of the triode V3 is connected to a common point G, a collector of the triode V3 is connected to one end of the capacitor C4 and IPM, and the other end of the capacitor C4 is connected to the ground GND.
The power supply VCC is connected with the ground end GND through the MOS tube V2, after the grounding current limiting is realized, the common point G is low level, the triode V3 (PNP triode) is conducted, a high level signal is provided for the IPM, and a short circuit signal is fed back.
The working principle of the utility model is as follows: the voltage regulating module is used for providing voltage signals of a working pin and a grounding end of a power supply and undervoltage detection function; the filtering processing module is used for filtering the voltage difference between the power supply and the working pin of the undervoltage detection function and outputting the voltage difference to the protection detection module; the protection detection module is used for detecting the voltage difference between the power supply and the working pins of the undervoltage detection function to judge whether the power supply and the working pins of the undervoltage detection function are in short circuit or not, and the grounding leakage is carried out during the short circuit; the feedback prompt module is used for feeding back signals to the IPM when in short circuit.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (5)
1. An IPM protection detection circuit, characterized in that:
The IPM protection detection circuit includes:
The voltage regulating module is used for providing voltage signals of a power supply, a working pin with an undervoltage detection function and a grounding end;
The filtering processing module is used for filtering the voltage difference between the power supply and the working pin of the undervoltage detection function and outputting the filtered voltage difference to the protection detection module;
The protection detection module is used for detecting the voltage difference between the power supply and the working pins of the undervoltage detection function to judge whether the power supply and the working pins of the undervoltage detection function are short-circuited or not, and the grounding leakage is carried out during the short circuit;
the feedback prompt module is used for feeding back signals to the IPM during short circuit;
The voltage regulating module is connected with the filtering processing module and the feedback prompting module, and the filtering processing module is connected with the protection detection module.
2. The IPM protection and detection circuit according to claim 1, wherein the voltage adjusting module comprises a resistor R1, a potentiometer RP1 and a resistor R2, wherein one end of the resistor R1 is connected to the power supply VCC, the other end of the resistor R1 is connected to one end of the potentiometer RP1, the other end of the potentiometer RP1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the ground GND, and the sliding end of the potentiometer RP1 is connected to the operating pin VDD and the common point G of the undervoltage detection function.
3. The IPM protection detection circuit according to claim 2, wherein the filtering processing module comprises a capacitor C1, a capacitor C2, and a resistor R1, wherein one end of the resistor R1 is connected to one end of the capacitor C1, one end of the capacitor C2, and a power supply VCC, the other end of the capacitor C1 is connected to the common point G, the other end of the capacitor C2 is connected to the common point G, and the other end of the resistor R1 is connected to the common point G.
4. The IPM protection detection circuit according to claim 2, wherein the protection detection module comprises a diode D1, a resistor R3, a MOS tube V1, a diode D2, a resistor R4, a diode D3, and a MOS tube V2, wherein the D pole of the MOS tube V1 is connected to the negative pole of the diode D1, a power supply VCC, and the S pole of the MOS tube V2, the positive pole of the diode D1 is connected to one end of the resistor R3, the G pole of the MOS tube V1, the other end of the resistor R3 is connected to the common point G, the S pole of the MOS tube V1 is connected to the negative pole of the diode D2, the positive pole of the diode D2 is connected to one end of the resistor R4, the G pole of the MOS tube V2, the other end of the resistor R4 is connected to the positive pole of the diode D3, the negative pole of the diode D3 is connected to the ground GND, and the D pole of the MOS tube V2 is connected to the ground GND.
5. The IPM protection and detection circuit according to claim 2, wherein the feedback prompt module comprises a resistor R4, a capacitor C3, a capacitor C4, and a triode V3, wherein one end of the resistor R4 is connected to a voltage of 5V, the other end of the resistor R4 is connected to one end of the capacitor C3, an emitter of the triode V3, the other end of the capacitor C3 is connected to the ground GND, a G pole of the triode V3 is connected to the common point G, a collector of the triode V3 is connected to one end of the capacitor C4, IPM, and the other end of the capacitor C4 is connected to the ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322436821.7U CN221378211U (en) | 2023-09-07 | 2023-09-07 | IPM protection detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322436821.7U CN221378211U (en) | 2023-09-07 | 2023-09-07 | IPM protection detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221378211U true CN221378211U (en) | 2024-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322436821.7U Active CN221378211U (en) | 2023-09-07 | 2023-09-07 | IPM protection detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221378211U (en) |
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2023
- 2023-09-07 CN CN202322436821.7U patent/CN221378211U/en active Active
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