CN105991005B - Intelligent power module integrated circuit and household electrical appliance - Google Patents
Intelligent power module integrated circuit and household electrical appliance Download PDFInfo
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Abstract
The invention discloses a kind of intelligent power module integrated circuits, including drive module, protection module and switching tube；Switching tube has first end, second end and control terminal；The signal output end of control terminal and drive module connects, and second end is connect with ground terminal；Drive module is connect with preset control chip, and the signal output end through drive module after the pulse-width signal amplification for receiving control chip output is exported to switching tube, with driving switch pipe；Drive module is used to detect the output voltage size of signal output end, and whether belongs to the state that preset interval range adjusts signal output end output pulse width modulated signal according to the output voltage size of signal output end；The working condition of the voltage swing control switching tube of first end when protection module is used to be turned off according to switching tube；Or protection module is used for the working condition of the size of current control switching tube of second end when detection switch pipe is opened.The invention also discloses a kind of household electrical appliance.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to an intelligent power module integrated circuit and a household appliance.
Background
As is known, in the conventional IGBT driving circuit, a pulse width modulation signal is usually output by a single chip, and amplified by a driving module to form a gate driving voltage which is directly output to a gate of the IGBT, so as to control the switching of the IGBT. The on and off of the IGBT is usually controlled only by the pulse width modulation signal input on the gate, but if the duty ratio of the pulse width modulation signal is set improperly, the voltage of the collector is too high when the IGBT is turned off, so that the IGBT is damaged, and the stability of the circuit operation is affected.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an intelligent power module integrated circuit and a household appliance, and aims to improve the working stability of the circuit.
In order to achieve the above object, the present invention provides an intelligent power module integrated circuit, which includes a driving module, a protection module and a switching tube; wherein,
the switch tube is provided with a first end, a second end and a control end for controlling the communication state of the first end and the second end; the control end is connected with the signal output end of the driving module, and the second end is connected with the grounding end;
the driving module is connected with a preset control chip, amplifies a pulse width modulation signal output by the control chip and outputs the amplified pulse width modulation signal to the switching tube through a signal output end of the driving module so as to drive the switching tube;
the driving module is used for detecting the output voltage of the signal output end and adjusting the state of the pulse width modulation signal output by the signal output end according to whether the output voltage of the signal output end belongs to a preset interval range;
the protection module is used for controlling the working state of the switch tube according to the voltage of the first end when the switch tube is turned off; or the protection module is used for detecting the current of the second end when the switch tube is switched on to control the working state of the switch tube.
Preferably, the adjusting, by the protection module, the state of the pulse width modulation signal output by the signal output terminal according to the output voltage of the signal output terminal includes:
when the output voltage of the signal output end does not belong to the preset interval range, the driving module controls the signal output end to stop outputting the pulse width modulation signal;
or when the output voltage of the signal output end does not belong to the preset interval range, the driving module outputs a control signal to the control chip so that the control chip stops outputting the pulse width modulation signal.
Preferably, the driving module is further configured to compare the received pulse width modulation signal with a preset reference square wave signal, and adjust a state of the pulse width modulation signal output by the signal output terminal according to a comparison result.
Preferably, the switch tube is an insulated gate bipolar transistor, the first end is a collector of the insulated gate bipolar transistor, the second end is an emitter of the insulated gate bipolar transistor, and the control end is a gate of the insulated gate bipolar transistor.
Preferably, the driving module is further configured to detect a voltage between a collector and an emitter of the igbt, determine a working state of the igbt according to the voltage between the collector and the emitter of the igbt at the moment of turning on when the igbt is turned on, and adjust a time for which the output voltage of the signal output terminal rises to a second preset value according to the working state.
Preferably, the operating states include start-up, hard-on and normal;
the adjusting the time when the output voltage of the signal output end rises to the second preset value according to the working state comprises the following steps:
when the working state is starting, the time when the voltage of the signal output end rises to a second preset value is a first threshold value;
when the working state is hard on, the time when the voltage of the signal output end rises to a second preset value is a second threshold value;
and when the working state is normal, the time when the voltage of the signal output end rises to a second preset value is a third threshold value.
Preferably, when the protection module is configured to control the working state of the switching tube according to the voltage of the first end when the switching tube is turned off, the protection module includes a voltage sampling circuit and a comparator, the voltage sampling circuit includes a first resistor and a second resistor, one end of the first resistor is connected to the first end, and the other end of the first resistor is connected to the ground end through the second resistor; the non-inverting input end of the comparator is connected to the common end of the first resistor and the second resistor, the inverting input end of the comparator is connected with a preset reference voltage end, and the output end of the comparator is connected to the control end.
Preferably, when the protection module is configured to detect that the current of the second terminal controls the operating state of the switching tube when the switching tube is turned on, the smart power module integrated circuit further includes a third resistor connected in series between the second terminal and the ground terminal, and the voltage detection terminal of the protection module is connected to the second terminal to detect the current of the second terminal.
Preferably, the protection module is connected to the driving module, and when it is detected that the current at the second end is greater than a preset value, the protection module outputs a control signal to the driving module, so that the driving module controls the signal output end to output a preset level signal, and the switching tube is turned off.
Preferably, the protection module is connected to the control chip, and when it is detected that the current at the second end is greater than a preset value, the protection module outputs a control signal to the control chip, so that the control chip adjusts the duty ratio of the pulse width modulation signal output to the driving module.
In addition, in order to achieve the above object, the present invention further provides a household appliance, which includes an intelligent power module integrated circuit, wherein the intelligent power module integrated circuit includes a driving module, a protection module and a switching tube; wherein,
the switch tube is provided with a first end, a second end and a control end for controlling the communication state of the first end and the second end; the control end is connected with the signal output end of the driving module, and the second end is connected with the grounding end;
the driving module is connected with a preset control chip, amplifies a pulse width modulation signal output by the control chip and outputs the amplified pulse width modulation signal to the switching tube through a signal output end of the driving module so as to drive the switching tube;
the driving module is used for detecting the output voltage of the signal output end and adjusting the state of the pulse width modulation signal output by the signal output end according to whether the output voltage of the signal output end belongs to a preset interval range;
the protection module is used for controlling the working state of the switch tube according to the voltage of the first end when the switch tube is turned off; or the protection module is used for detecting the current of the second end when the switch tube is switched on to control the working state of the switch tube.
According to the embodiment of the invention, the working state of the switching tube is controlled by arranging the protection module according to the voltage of the first end when the switching tube is turned off; and controlling the working state of the switch tube according to the current of the second end when the switch tube is switched on. Therefore, the switch tube is effectively prevented from being damaged due to overhigh voltage between the first end and the second end in the off state. In addition, the state of the pulse width modulation signal is output by the driving module according to the voltage control signal output end of the signal output end, so that the situation that the switching tube is burnt out due to overhigh driving voltage of the switching tube and cannot be opened or is in an amplification state due to overlow driving voltage of the switching tube can be effectively prevented. Therefore, the intelligent power module integrated circuit provided by the invention improves the stability of circuit operation.
Drawings
FIG. 1 is a schematic diagram of a circuit connection structure of a first embodiment of an integrated circuit of an intelligent power module according to the invention;
fig. 2 is a schematic circuit connection structure diagram of a second embodiment of the smart power module integrated circuit according to the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention provides an intelligent power module integrated circuit, referring to fig. 1, in an embodiment, the intelligent power module integrated circuit includes a driving module 10, a protection module 20, and a switching tube 30; wherein,
the switch tube 30 has a first end, a second end and a control end for controlling the communication state between the first end and the second end; the control end is connected with the signal output end of the driving module, and the second end is connected with the grounding end;
the driving module 10 is connected to a preset control chip 40, and amplifies a pulse width modulation signal received from the control chip 40 and outputs the amplified pulse width modulation signal to the switching tube 30 through a signal output end of the driving module 10, so as to drive the switching tube 30;
the driving module 10 is configured to detect an output voltage of the signal output end, and adjust a state of the signal output end outputting the pulse width modulation signal according to whether the output voltage of the signal output end belongs to a preset interval range;
the protection module 20 is configured to control a working state of the switching tube 30 according to a voltage of the first end when the switching tube 30 is turned off; or the protection module 20 is configured to detect a current at the second end when the switching tube 30 is turned on, so as to control a working state of the switching tube 30.
The driving circuit provided by the embodiment is mainly used for realizing the driving control of the switching tube 30. Specifically, the structure of the switch tube 30 may be set according to actual needs, in this embodiment, the switch tube 30 is preferably an Insulated Gate Bipolar Transistor (IGBT), the first end is a collector of the IGBT, the second end is an emitter of the IGBT, and the control end is a gate of the IGBT.
Specifically, the first end of the switching tube 30 is used to connect with a parallel resonant circuit, which includes a coil L and a resonant capacitor C. When the switch tube 30 is turned off, the coil L and the resonant capacitor C enter a resonant state, and the electric energy rises, at which time the voltage between the first end and the second end of the switch tube 30 will rise. When the switch tube 30 is turned on, the energy stored in the coil L and the resonant capacitor C is released to reduce the voltage between the first end and the second end of the switch tube 30, so as to prevent the switch tube 30 from being damaged due to the excessively high voltage between the first end and the second end of the switch tube 30 after the switch tube 30 is turned off.
In this embodiment, the voltage of the first end and the second end of the switching tube 30 can be prevented from being too high, specifically, the voltage of the first end when the switching tube 30 is turned off can be detected, or the current of the second end when the switching tube 30 is turned on can be detected.
When the voltage of the first end is detected to be large when the switching tube 30 is turned off, if the voltage of the first end is larger than the preset voltage when the switching tube 30 is turned off, the switching tube 30 is controlled to be turned on, and the switching tube 30 is prevented from being damaged due to the fact that the voltages of the first end and the second end of the switching tube 30 are too high.
In this embodiment, the maximum voltage of the switching tube 30 after being turned off can be estimated according to the current magnitude of the second end of the switching tube 30. When the current of the second end is detected when the switching tube 30 is turned on, if the current of the second end is greater than a preset value when the switching tube 30 is turned on, the switching tube 30 is controlled to be turned off, so that the switching tube 30 is prevented from being damaged due to overhigh voltage rise after the switching tube 30 is turned off.
The adjusting, by the driving module 10, the state of the pulse width modulation signal output by the signal output end according to the output voltage of the signal output end includes:
when the output voltage of the signal output end does not belong to the preset interval range, the driving module 10 controls the signal output end to stop outputting the pulse width modulation signal;
or when the output voltage of the signal output end does not belong to the preset interval range, the driving module 10 outputs a control signal to the control chip 40, so that the control chip 40 stops outputting the pulse width modulation signal.
The preset interval range may be set according to actual requirements, and is not further limited herein as long as the switching tube 30 can be driven and the switching tube 30 is prevented from being burned out.
It should be noted that, the driving module 10 may use a built-in voltage sampling circuit to detect the voltage of the signal input end, and may also use a comparator to determine the voltage of the first end, and the specific circuit form may be set according to actual needs, which is not further limited herein. It can be understood that, when the output voltage of the signal output terminal does not belong to the preset interval range, the voltage of the signal output terminal of the driving module 10 may also be adjusted by the control chip 40 or the driving module 10, so that the voltage of the signal output terminal is stabilized within the preset interval range. Specifically, the output voltage of the signal output terminal is the gate driving voltage of the insulated gate bipolar transistor. For example, when the gate driving voltage of the igbt is greater than the upper limit value of the preset interval range, the driving module 10 may stop outputting the pulse width modulation signal to the gate of the igbt (i.e., pull the gate voltage of the igbt low). Thereby preventing the gate drive voltage of the insulated gate bipolar transistor from being too high to damage the insulated gate bipolar transistor.
In the embodiment of the invention, the protection module 20 is arranged to control the working state of the switching tube 30 according to the voltage of the first end when the switching tube 30 is turned off; and controlling the working state of the switch tube 30 according to the current of the second end when the switch tube 30 is switched on. Therefore, the switch tube 30 is effectively prevented from being damaged by the over-high voltage between the first end and the second end in the off state of the switch tube 30. In addition, the state of the pulse width modulation signal output by the signal output end is controlled by the driving module 10 according to the voltage of the signal output end, so that the situation that the switching tube 30 is burnt out due to too high driving voltage of the switching tube 30 and the switching tube 30 cannot be opened or is in an amplification state due to too low driving voltage of the switching tube 30 can be effectively prevented. Therefore, the intelligent power module integrated circuit provided by the invention improves the stability of circuit operation.
Further, based on the above embodiment, in a second embodiment, the driving module 10 is further configured to compare the received pulse width modulation signal with a preset reference square wave signal, and adjust the state of the pulse width modulation signal output by the signal output end according to the comparison result.
In this embodiment, the reference square wave signal may be generated by the control chip 40 or generated by a square wave generating circuit, and the pulse width of the reference square wave signal is the maximum pulse width allowed to be output.
When the pulse width of the pulse width modulation signal received by the driving module 10 is greater than the pulse width of the reference square wave signal, the driving module 10 controls the pulse width in the corresponding period of the pulse width modulation signal output by the signal output end to be adjusted to the pulse width of the reference square wave signal, or controls the signal output end to stop outputting the pulse width modulation signal;
or when the pulse width of the pulse width modulation signal received by the driving module 10 is greater than the pulse width of the reference square wave signal, the driving module 10 outputs a control signal to the control chip 40, so that the control chip 40 adjusts the state of the pulse width modulation signal output to the driving module 10.
In the embodiment, the duty ratio of the pulse width modulation signal is limited, so that the phenomena of overcurrent, overvoltage, overheating and the like of the insulated gate bipolar transistor caused by overlong conduction time of the insulated gate bipolar transistor are prevented, and the use safety of the insulated gate bipolar transistor is improved.
Further, based on the above embodiments, in a third embodiment, the driving module 10 is further configured to detect a voltage between a collector and an emitter of the igbt, determine an operating state of the igbt according to the voltage between the collector and the emitter of the igbt at the moment of turning on when the igbt is turned on, and adjust a time for which the output voltage of the signal output terminal rises to a second preset value according to the operating state.
It should be noted that the voltage detection terminal of the driving module 10 is connected to the collector of the igbt, and the ground terminal is connected to the emitter of the igbt; thereby detecting the voltage between the collector and emitter of the insulated gate bipolar transistor.
Specifically, the working states include start-up, hard-on, and normal;
the adjusting the time when the output voltage of the signal output end rises to the second preset value according to the working state comprises the following steps:
when the working state is starting, the time when the voltage of the signal output end rises to a second preset value is a first threshold value;
when the working state is hard on, the time when the voltage of the signal output end rises to a second preset value is a second threshold value;
and when the working state is normal, the time when the voltage of the signal output end rises to a second preset value is a third threshold value.
In this embodiment, the current peak value of the IGBT is large in both the hard switching caused by the IGBT turning on in advance (the IGBT is turned on when the IGBT Vce does not resonate to 0) and the first period in which the IGBT is turned on because the resonant capacitance sharply rises from the voltage of 0 to the dc bus voltage (311V in the case of 220V).
Specifically, based on the above-described embodiments, different detection modes will be described in detail below.
In the fourth embodiment, when the protection module 20 is configured to control the operating state of the switching tube 30 according to the voltage of the first end when the switching tube 30 is turned off, the protection module 20 includes a voltage sampling circuit and a comparator, the voltage sampling circuit includes a first resistor and a second resistor, one end of the first resistor is connected to the first end, and the other end of the first resistor is connected to the ground end through the second resistor; the non-inverting input end of the comparator is connected to the common end of the first resistor and the second resistor, the inverting input end of the comparator is connected with a preset reference voltage end, and the output end of the comparator is connected to the control end.
In this embodiment, when the switching tube 30 is in the off state, when the voltage across the second resistor is smaller than the preset reference voltage of the preset reference voltage terminal (i.e. the voltage between the first terminal and the second terminal is smaller than the preset voltage), the switching tube 30 keeps the off state according to the pulse width modulation signal output by the signal output terminal; when the voltage across the second resistor is greater than the preset reference voltage at the preset reference voltage end (i.e. the voltage between the first end and the second end is greater than the preset voltage), the comparator will output a high level, so that the switching tube 30 is turned on, and the energy stored in the coil L and the resonant capacitor C is released.
In the fifth embodiment, when the protection module 20 is configured to control the operating state of the switching tube 30 according to the voltage of the first end when the switching tube 30 is turned off, the protection module 20 includes a voltage sampling circuit and a comparator, the voltage sampling circuit includes a first resistor and a second resistor, one end of the first resistor is connected to the first end, and the other end of the first resistor is connected to the ground end through the second resistor; the non-inverting input end of the comparator is connected to the common end of the first resistor and the second resistor, the inverting input end of the comparator is connected to a preset reference voltage end, and the output end of the comparator is connected to the driving module 10;
when the voltage of the first end is greater than the preset reference voltage, the comparator outputs a control signal to the driving module 10, and the driving module 10 outputs a preset level signal according to the control signal output end, so that the switching tube 30 is turned on.
In this embodiment, when the switching tube 30 is in the off state, when the voltage across the second resistor is smaller than the preset reference voltage of the preset reference voltage terminal (i.e. the voltage between the first terminal and the second terminal is smaller than the preset voltage), the switching tube 30 keeps the off state according to the pulse width modulation signal output by the signal output terminal; when the voltage across the second resistor is greater than the preset reference voltage at the preset reference voltage end (i.e. the voltage between the first end and the second end is greater than the preset voltage), the comparator outputs a high level signal to the driving module 10, so that the driving module 10 controls the signal output end to output the high level signal, and the switching tube 30 is turned on to release the energy stored in the coil L and the resonant capacitor C.
In the sixth embodiment, when the protection module 20 is configured to control the operating state of the switching tube 30 according to the voltage of the first end when the switching tube 30 is turned off, the protection module 20 includes a voltage sampling circuit and a comparator, the voltage sampling circuit includes a first resistor and a second resistor, one end of the first resistor is connected to the first end, and the other end of the first resistor is connected to the ground end through the second resistor; the non-inverting input end of the comparator is connected to the common end of the first resistor and the second resistor, the inverting input end of the comparator is connected with a preset reference voltage end, and the output end of the comparator is connected with the control chip 40;
when the voltage of the first terminal is greater than a preset reference voltage, the comparator outputs a control signal to the control chip 40, so that the control chip 40 adjusts the duty ratio of the pulse width modulation signal output to the driving module 10.
In this embodiment, the duty ratio of the pulse width modulation signal of the driving module 10 is changed by the control chip 40, so that the voltage between the first end and the second end of the switching tube 30 in the turn-off period is limited, and the switching tube 30 is prevented from being damaged due to the excessive voltage between the first end and the second end in the turn-off period, thereby prolonging the service life of the switching tube 30.
In the seventh embodiment, when the protection module 20 is configured to detect a current magnitude of the second end when the switching tube 30 is turned on to control the operating state of the switching tube 30, the smart power module integrated circuit further includes a third resistor R3 connected in series between the second end and the ground end, and a voltage detection end of the protection module 20 is connected to the second end to detect the current magnitude of the second end.
In this embodiment, the protection module 20 can calculate and obtain the current flowing through the third resistor R3, i.e. the current flowing through the second end of the switching tube 30, according to the voltage detected by the voltage detecting terminal. Then, the maximum voltage between the first end and the second end of the switching tube 30 after being turned off is estimated according to the current magnitude, when the current flowing through the third resistor R3 makes the maximum voltage between the first end and the second end of the switching tube 30 after being turned off greater than the preset voltage, the switching tube 30 is controlled to be turned off to ensure that the maximum voltage between the first end and the second end of the switching tube 30 after being turned off is less than the preset voltage, so as to prevent the switching tube 30 from being damaged, and at this time, the magnitude of the current flowing through the third resistor R3 is the maximum current value allowed to flow when the switching tube 30 is turned on, which is referred to as a preset value in the following embodiments. It should be noted that the third resistor R3 may be a resistor built in the smart power module integrated circuit, or in a specific application, may also be an external resistor (as shown in fig. 2).
It can be understood that the level state output by the signal output terminal of the driving module 10 can be controlled by the driving module 10 itself, or can be controlled by the pulse width modulation signal output to the driving module 10 by the control chip 40, and the specific implementation manner thereof can be set according to actual needs, and is not further limited herein.
Based on the seventh embodiment, in an implementation manner, the protection module 20 is connected to the driving module 10, and when it is detected that the current at the second end is greater than a preset value, the protection module outputs a control signal to the driving module 10, so that the driving module 10 controls the signal output end to output a preset level signal, so as to turn off the switch tube 30.
In another embodiment, the protection module 20 is connected to the control chip 40, and when it is detected that the current at the second end is greater than a preset value, the protection module outputs a control signal to the control chip 40, so that the control chip 40 adjusts the duty ratio of the pwm signal output to the driving module 10.
It should be understood that, when the circuit is designed, either of the two embodiments may be adopted, and the protection module 20 may output the control signal to the driving module 10 and the control chip 40 at the same time, that is, the control signal output terminal of the protection module 20 may be connected to the driving module 10 and the control chip 40 at the same time.
Further, based on any of the above embodiments, the intelligent power module integrated circuit further includes a temperature sensor 50 for detecting a temperature of the switching tube 30, the temperature sensor 50 is connected to the protection module 20, and the protection module 20 outputs a control signal to the driving module 10 or the control chip 40 according to the temperature detected by the temperature sensor 50, so that the driving module 10 or the control chip 40 adjusts a duty ratio of the pulse width modulation signal output by the signal output end according to the control signal.
In the embodiment of the present invention, the protection module 20 detects the temperature of the switching tube 30 through the temperature sensor 50, and feeds back the temperature of the switching tube 30 to the driving module 10 or the control chip 40, and the driving module 10 or the control chip 40 adjusts the duty ratio of the pulse width modulation signal according to the temperature, so as to achieve operations such as reducing power, increasing power, turning off the switching tube 30, and the like.
The present invention further provides a household appliance, which includes an intelligent power module integrated circuit, and the structure of the intelligent power module integrated circuit can refer to the above embodiments, which are not described herein again. It should be understood that, since the household electrical appliance of the embodiment adopts the technical solution of the intelligent power module integrated circuit, the household electrical appliance has all the beneficial effects of the intelligent power module integrated circuit.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An intelligent power module integrated circuit is characterized by comprising a driving module, a protection module and a switching tube; wherein,
the switch tube is provided with a first end, a second end and a control end for controlling the communication state of the first end and the second end; the control end is connected with the signal output end of the driving module, and the second end is connected with the grounding end;
the driving module is connected with a preset control chip, amplifies a pulse width modulation signal output by the control chip and outputs the amplified pulse width modulation signal to the switching tube through a signal output end of the driving module so as to drive the switching tube;
the driving module is used for detecting the output voltage of the signal output end and adjusting the state of the pulse width modulation signal output by the signal output end according to whether the output voltage of the signal output end belongs to a preset interval range;
the protection module is used for controlling the working state of the switch tube according to the voltage of the first end when the switch tube is turned off; or the protection module is used for detecting the current of the second end when the switch tube is switched on to control the working state of the switch tube;
the switch tube is an insulated gate bipolar transistor, the first end is a collector electrode of the insulated gate bipolar transistor, the second end is an emitter electrode of the insulated gate bipolar transistor, and the control end is a gate electrode of the insulated gate bipolar transistor;
the driving module is further configured to detect a voltage between a collector and an emitter of the insulated gate bipolar transistor, determine a working state of the insulated gate bipolar transistor according to the voltage between the collector and the emitter of the insulated gate bipolar transistor at the moment of turning on when the insulated gate bipolar transistor is turned on, and adjust a time for which the output voltage of the signal output terminal rises to a second preset value according to the working state.
2. The smart power module integrated circuit of claim 1, wherein the driving module adjusting the state of the signal output terminal outputting the pulse width modulation signal according to the magnitude of the output voltage of the signal output terminal comprises:
when the output voltage of the signal output end does not belong to the preset interval range, the driving module controls the signal output end to stop outputting the pulse width modulation signal;
or when the output voltage of the signal output end does not belong to the preset interval range, the driving module outputs a control signal to the control chip so that the control chip stops outputting the pulse width modulation signal.
3. The smart power module integrated circuit of claim 1, wherein the driving module is further configured to compare the received pulse width modulation signal with a preset reference square wave signal, and adjust the state of the pulse width modulation signal output from the signal output terminal according to the comparison result.
4. The smart power module integrated circuit of claim 1, wherein the operating states include start-up, hard-on, and normal;
the adjusting the time when the output voltage of the signal output end rises to the second preset value according to the working state comprises the following steps:
when the working state is starting, the time when the voltage of the signal output end rises to a second preset value is a first threshold value;
when the working state is hard on, the time when the voltage of the signal output end rises to a second preset value is a second threshold value;
and when the working state is normal, the time when the voltage of the signal output end rises to a second preset value is a third threshold value.
5. The intelligent power module integrated circuit according to claim 1, wherein when the protection module is configured to control the operating state of the switching tube according to the voltage magnitude of the first terminal when the switching tube is turned off, the protection module comprises a voltage sampling circuit and a comparator, the voltage sampling circuit comprises a first resistor and a second resistor, one terminal of the first resistor is connected to the first terminal, and the other terminal of the first resistor is connected to the ground terminal through the second resistor; the non-inverting input end of the comparator is connected to the common end of the first resistor and the second resistor, the inverting input end of the comparator is connected with a preset reference voltage end, and the output end of the comparator is connected to the control end.
6. The smart power module integrated circuit as claimed in claim 1, wherein the protection module is configured to detect a current level of the second terminal when the switching transistor is turned on to control an operating state of the switching transistor, the smart power module integrated circuit further includes a third resistor connected in series between the second terminal and the ground terminal, and the voltage detection terminal of the protection module is connected to the second terminal to detect the current level of the second terminal.
7. The smart power module integrated circuit according to claim 6, wherein the protection module is connected to the driving module, and when detecting that the current at the second terminal is greater than a preset value, outputs a control signal to the driving module, so that the driving module controls the signal output terminal to output a preset level signal, so as to turn off the switching tube.
8. The smart power module integrated circuit of claim 6, wherein the protection module is connected to the control chip and outputs a control signal to the control chip when detecting that the current at the second terminal is greater than a preset value, so that the control chip can adjust the duty ratio of the pwm signal output to the driving module.
9. A domestic appliance comprising a smart power module integrated circuit as claimed in any one of claims 1 to 8.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057187.3A CN105991005B (en) | 2015-02-03 | 2015-02-03 | Intelligent power module integrated circuit and household electrical appliance |
| EP15880852.7A EP3255957B1 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic heating control circuit and electromagnetic heating device |
| PCT/CN2015/082969 WO2016123897A1 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic heating control circuit and electromagnetic heating device |
| KR1020177024696A KR102057136B1 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic heating control circuit and electromagnetic heating device |
| JP2017540765A JP6473514B2 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic induction heating control circuit and electromagnetic induction heating equipment |
| US15/665,044 US10638551B2 (en) | 2015-02-02 | 2017-07-31 | Electromagnetic heating control circuit and electromagnetic heating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10411692B2 (en) | 2016-11-23 | 2019-09-10 | Alpha And Omega Semiconductor Incorporated | Active clamp overvoltage protection for switching power device |
| US10477626B2 (en) | 2016-11-23 | 2019-11-12 | Alpha And Omega Semiconductor (Cayman) Ltd. | Hard switching disable for switching power device |
| CN108631617B (en) * | 2017-03-20 | 2020-06-16 | 万国半导体(开曼)股份有限公司 | Hard switch disabling for switching power supply devices |
| US10476494B2 (en) | 2017-03-20 | 2019-11-12 | Alpha And Omega Semiconductor (Cayman) Ltd. | Intelligent power modules for resonant converters |
| CN110859014B (en) * | 2018-08-22 | 2021-12-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating device and control method thereof |
| CN109787596B (en) * | 2018-12-25 | 2023-08-04 | 深圳市优必选科技有限公司 | Overcurrent protection circuit, switching tube driving circuit and electric equipment |
| CN113037059B (en) * | 2019-12-24 | 2022-11-08 | 广东美的白色家电技术创新中心有限公司 | Intelligent power module and drive control method |
| CN112511143B (en) * | 2020-12-15 | 2023-11-21 | 四川虹美智能科技有限公司 | IGBT protection circuit and protection method |
| CN115693594A (en) * | 2022-11-14 | 2023-02-03 | 珠海格力电器股份有限公司 | Power supply under-voltage protection method, power supply voltage protection system and switching amplifier |
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