CN115021201A - Protection circuit, protection method, radio frequency device, management device and electronic equipment - Google Patents

Protection circuit, protection method, radio frequency device, management device and electronic equipment Download PDF

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Publication number
CN115021201A
CN115021201A CN202210612044.4A CN202210612044A CN115021201A CN 115021201 A CN115021201 A CN 115021201A CN 202210612044 A CN202210612044 A CN 202210612044A CN 115021201 A CN115021201 A CN 115021201A
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CN
China
Prior art keywords
circuit
power
current
abnormal
power supply
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Pending
Application number
CN202210612044.4A
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Chinese (zh)
Inventor
彭博
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202210612044.4A priority Critical patent/CN115021201A/en
Publication of CN115021201A publication Critical patent/CN115021201A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application discloses a protection circuit, a protection method, a radio frequency device, a management device and electronic equipment. The protection circuit is used for a power supply circuit which supplies power to at least two power amplifiers. The protection circuit includes a switching circuit and a detection control circuit. At least two power amplifiers are connected with the power supply circuit through a switch circuit, and the switch circuit is connected with or disconnected from each power amplifier and the power supply circuit. The detection control circuit respectively detects whether the current when each power amplifier is communicated with the power supply circuit is larger than a threshold value or not and generates a disconnection signal when the current is larger than the threshold value so as to disconnect the corresponding power amplifier from the power supply circuit. Therefore, the detection control circuit is used for detecting the abnormal circuit, the detection control circuit and the switching element are used for disconnecting the abnormal power amplifier from the power supply circuit, disconnecting the abnormal circuit and controlling the power supply circuit to be connected with other power amplifiers, so that the other power amplifiers can be ensured to normally work, and the other power amplifiers and the power supply circuit can be protected.

Description

Protection circuit, protection method, radio frequency device, management device and electronic equipment
Technical Field
The present disclosure relates to the field of circuit protection technologies, and in particular, to a protection circuit, a protection method, a radio frequency device, an integrated power management device, and an electronic apparatus.
Background
With the development of the technology, the radio frequency antenna of the mobile phone needs to be designed separately, so that the number of the radio frequency antennas of the mobile phone is increased, the number of the corresponding power amplifiers for driving the radio frequency antennas is increased, and the power amplifiers are usually powered by the same power chip, so that when one of the power amplifiers is abnormally damaged, a large current is caused, and the large current may damage other power amplifiers or even damage the power chip.
Disclosure of Invention
The embodiment of the application provides a protection circuit, a protection method, a radio frequency device, an integrated power management device and electronic equipment.
The protection circuit of the embodiment of the application is used for a power supply circuit. The power supply circuit is used for supplying power to at least two power amplifiers. The protection circuit comprises a switch circuit and a detection control circuit. The at least two power amplifiers are connected with the power supply circuit through the switch circuit, and the switch circuit is used for connecting or disconnecting each power amplifier with the power supply circuit. The detection control circuit is used for respectively detecting whether the current of each power amplifier is larger than a threshold value when the power amplifier is communicated with the power supply circuit and generating a disconnection signal when the current is larger than the threshold value so as to disconnect the corresponding power amplifier from the power supply circuit.
The protection method of the embodiment of the application is used for the power circuit. The power supply circuit is used for supplying power to at least two power amplifiers. The protection method comprises the following steps: communicating each of the power amplifiers with the power supply circuit; detecting whether the current when each power amplifier is communicated with the power supply circuit is larger than a threshold value or not, and generating a disconnection signal when the current is larger than the threshold value so as to disconnect the corresponding power amplifier from the power supply circuit.
The radio frequency device comprises a radio frequency power supply circuit and the protection circuit, wherein the protection circuit is used for protecting the radio frequency power supply circuit.
The integrated power management device comprises an integrated power circuit and the protection circuit, wherein the protection circuit is used for protecting the integrated power circuit.
The electronic equipment of the embodiment of the application comprises the radio frequency device and/or the integrated power management device, and further comprises a shell, wherein the radio frequency device and/or the integrated power management device are arranged in the shell.
According to the protection circuit, the protection method, the radio frequency device, the integrated power management device and the electronic equipment, the detection control circuit can be used for detecting the abnormal circuit, and the detection control circuit and the switch element are used for disconnecting the abnormal power amplifier from the power circuit, so that the abnormal circuit can be disconnected, the power circuit is controlled to be connected with other power amplifiers, the other power amplifiers can work normally, and the other power amplifiers and the power circuit are protected.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow diagram of a protection method according to certain embodiments of the present application;
FIG. 2 is a schematic diagram of the structure of a radio frequency device according to some embodiments of the present application;
FIG. 3 is another schematic diagram of an RF device according to some embodiments of the present application;
FIGS. 4-7 are schematic flow diagrams of protection methods according to certain embodiments of the present application;
FIG. 8 is a block diagram of a radio frequency device according to some embodiments of the present application;
FIG. 9 is a block diagram of an integrated power management device according to some embodiments of the present application;
FIG. 10 is a schematic diagram of an electronic device according to some embodiments of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
As the frequency bands of mobile phones are increasing, the mobile phones need to be provided with a plurality of power amplifiers to amplify signals of different frequency bands. The power supply circuit in the related art may supply power to a plurality of power amplifiers, that is, the power supply voltages of the plurality of power amplifiers in the related art are connected together, so that if the power supply voltage of one power amplifier is abnormal, the power supply circuit and other power amplifiers may be damaged. Specifically, when one power amplifier is in an abnormal state, the supply voltage of the power amplifier may be short-circuited to ground. Since the power supply circuit paths of the plurality of power amplifiers are connected together, the power supply voltages of the other power amplifiers are also short-circuited to ground, and thus a large current is generated. Before the abnormal power amplifier returns to normal, other power amplifiers cannot work normally, even other power amplifiers can be burnt out, and if the abnormal power amplifier is always in a short-circuit state, the large current can even cause the damage of a power supply circuit.
Referring to fig. 1, fig. 2 and fig. 3 together, a protection method according to an embodiment of the present application is applied to a power circuit 20, where the power circuit 20 is used to supply power to at least two power amplifiers 30, and the protection method includes:
01: communicating each power amplifier 30 with the power supply circuit 20;
02: detects whether or not the current at which each power amplifier 30 is connected to the power supply circuit 20 is greater than a threshold value and generates a disconnection signal to disconnect the corresponding power amplifier 30 from the power supply circuit 20 when it is greater than the threshold value.
Referring to fig. 2 and fig. 3 again, the protection method according to the embodiment of the present application can be implemented by the protection circuit 10 according to the embodiment of the present application. The protection circuit 10 includes a switching circuit 11 and a detection control circuit 12. At least two power amplifiers 30 are connected to the power supply circuit 20 through a switching circuit 11, and the switching circuit 11 is used to connect or disconnect each power amplifier 30 to the power supply circuit 20. The detection control circuit 12 is configured to detect whether a current flowing when each of the power amplifiers 30 is connected to the power supply circuit 20 is greater than a threshold value and generate a disconnection signal when the current is greater than the threshold value, so as to disconnect the corresponding power amplifier 30 from the power supply circuit 20.
In the protection method and the protection circuit 10 according to the embodiment of the present application, the detection control circuit 12 is used to detect an abnormal circuit, and the detection control circuit 12 and the switching element are used to disconnect the abnormal power amplifier 30 from the power supply circuit 20, so that the abnormal circuit can be disconnected, and the power supply circuit 20 can be controlled to be connected to other power amplifiers 30, thereby ensuring that other power amplifiers 30 can normally operate, and protecting other power amplifiers 30 and power supply circuits 20.
Specifically, the power supply circuit 20 may be a power supply chip that may supply power to at least two power amplifiers 30. In one embodiment, the power circuit 20 may be a Direct-Direct Current (DC-DC) power chip, also referred to as a DC-DC power chip. The DC-DC power supply chip has advantages of small size, high reliability, stable output voltage, various input and output voltages, etc., and can supply power to at least two power amplifiers 30.
The Power Amplifier 30 includes, but is not limited to, a Low Band Power Amplifier (LBPA), a medium High Band Power Amplifier (MHB PA), a High frequency Power Amplifier (HBPA), and an Ultra High Band Power Amplifier (UHBPA).
In one embodiment, the power supply circuit 20 is configured to supply two power amplifiers 30, and the two power amplifiers 30 may be a first low frequency power amplifier and a second low frequency power amplifier. In this way, when the first low-frequency power amplifier is damaged, the second low-frequency power amplifier can be switched to be used.
In another embodiment, the power supply circuit 20 is configured to supply two power amplifiers 30, wherein one power amplifier 30 is a low frequency power amplifier and the other power amplifier 30 is a mid-to-high frequency band power amplifier (as shown in fig. 2). The low-frequency power amplifier and the medium-high frequency range power amplifier can amplify the power of signals in different frequency ranges. When the low-frequency power amplifier is abnormally damaged, the middle-high frequency range power amplifier can normally work; when the power amplifier in the middle and high frequency range is abnormally damaged, the low frequency power amplifier can normally work.
In yet another embodiment, the power circuit 20 is used to power three power amplifiers 30, and the three power amplifiers 30 are a low frequency power amplifier, a mid-high frequency power amplifier, and an ultra-high frequency power amplifier (as shown in fig. 3). The low-frequency power amplifier, the medium-high frequency range power amplifier and the ultrahigh frequency power amplifier can amplify the power of signals in different frequency ranges. When the medium-high frequency power amplifier is damaged, the low-frequency band power amplifier and the ultrahigh frequency power amplifier can work normally.
Referring to fig. 2 and 3 again, in some embodiments, the protection circuit 10 and the power circuit 20 may be integrated into a power chip, and the switch circuit 11 may also be integrated into the power chip (as shown in fig. 2); the switch circuit 11 may be disposed on the path (as shown in fig. 3) independently, but not limited thereto.
Referring again to fig. 2, in some embodiments, the power circuit 20 is configured to supply two power amplifiers 30, and the two power amplifiers 30 may be a low frequency power amplifier and a mid-high frequency power amplifier. The switch circuit 11 is used to connect or disconnect the connection between the two power amplifiers 30 and the power supply circuit 20. The switch circuit 11 may be a Single Pole Double Throw (SPDT) switch, which includes an input terminal and two output terminals. The low-frequency power amplifier and the medium-high frequency range power amplifier respectively comprise a power supply end, a signal input end and a signal output end. The input end of the single-pole double-throw switch is connected with the output end of the power circuit 20, and two output ends of the single-pole double-throw switch are respectively connected with the power end of the low-frequency power amplifier and the power end of the medium-high frequency range power amplifier. The signal input terminal of the low-frequency power amplifier and the signal input terminal of the middle-high frequency power amplifier are respectively connected with two output terminals of the radio frequency transceiver 40. The signal output terminal of the low frequency power amplifier and the signal output terminal of the middle and high frequency band power amplifier are connected to two antennas 50, respectively.
The detection control circuit 12 may detect whether the current when the low frequency power amplifier is in communication with the power supply circuit 20 is greater than a threshold value, which may be understood as a pre-calibrated value. If the current is not greater than the threshold value, it is determined that the low-frequency power amplifier is not abnormal, so that the current state of the switching circuit 11 can be maintained, and the normal operation of the circuit can be maintained. If the current is larger than the threshold value, the low-frequency power amplifier is judged to be an abnormal power amplifier, a disconnection signal is generated, and the connection between the low-frequency power amplifier and the power circuit 20 is disconnected. If the current is less than or equal to the threshold value when the medium-high frequency power amplifier is connected to the power supply circuit 20 at this time, the high-frequency power amplifier can be switched to be used.
The detection control circuit 12 may also detect whether the current when the medium-high power amplifier is connected to the power supply circuit 20 is greater than a threshold, and if the current is not greater than the threshold, it is determined that the medium-high power amplifier is not abnormal, so that the current state of the switching circuit 11 may be maintained, and the normal operation of the circuit may be maintained. If the current is larger than the threshold value, the medium-high frequency power amplifier is judged to be an abnormal power amplifier, a disconnection signal is generated, and the connection between the medium-high frequency power amplifier and the power supply circuit 20 is disconnected. If the current is less than or equal to the threshold value when the low frequency power amplifier is connected to the power supply circuit 20, the low frequency power amplifier can be switched to use.
It should be noted that the above-mentioned examples and specific numerical values are provided for convenience of describing the implementation of the present application, and should not be construed as limiting the scope of the present application.
Referring to fig. 4, in some embodiments, step 02 includes:
021: collecting current;
022: judging whether the current is larger than a threshold value; and
023: the turn-off signal is generated when the current is greater than a threshold.
Referring to fig. 2 and fig. 3 again, the protection method according to the embodiment of the present application can be implemented by the protection circuit 10 according to the embodiment of the present application. The protection circuit 10 includes a detection control circuit 12, and the detection control circuit 12 includes a detection circuit 121, a comparison circuit 122, and a processing circuit 123. The detection circuit 121 is connected to the power circuit 20 and the switch circuit 11 to collect current. The comparing circuit 122 is connected to the detecting circuit 121 to determine whether the current is greater than a threshold. The processing circuit 123 connects the comparing circuit 122 and the switching circuit 11 and is configured to generate a turn-off signal when the current is greater than a threshold value.
As such, a disconnection signal may be generated to disconnect the abnormal power amplifier 30 from the power supply circuit 20 when the current is greater than the threshold.
Specifically, the input terminal of the detection circuit 121 is connected to the output terminal of the power circuit 20, the first output terminal of the detection circuit 121 is connected to the input terminal of the comparison circuit 122, the second output terminal of the detection circuit 121 is connected to the input terminal of the switch circuit 11, the output terminal of the comparison circuit 122 is connected to the input terminal of the processing circuit 123, the output terminal of the processing circuit 123 is connected to the control terminal of the switch circuit 11, and the output terminal of the switch circuit 11 is connected to the power terminal of the power amplifier.
In some embodiments, the detection circuit 121 may be a current detection circuit, and the current detection circuit includes a sampling resistor, and the sampling resistor is used for sampling, and then an amplifier is used for amplifying the voltage across the resistor to obtain the current value. In some embodiments, the detection circuit 121 may also be a high-sensitivity current detection circuit, which uses two diodes for current sampling to improve the sensitivity and the detection accuracy. In some embodiments, the detection circuit 121 includes a plurality of current meters, so that the current value of the path can be obtained by using the current meters. In some embodiments, the current value of the path may also be obtained by using a current transformer, which is not limited herein.
In one embodiment, the detection circuit 121 may include a current detection resistor, which is simple and easy to use and has a high cost performance. The current sensing resistor and the power circuit 20 may be connected in series in one path. When the switch circuit 11 is closed, the current flowing through the current detecting resistor can convert a small part of the electric energy into heat energy, and the energy conversion process generates a voltage signal, and a current value can be obtained through the voltage signal. Thus, the power circuit 20 and the switch circuit 11 can be connected to collect current through the detection circuit 121.
In some embodiments, the comparison circuit 122 may obtain a current value on the ammeter, and compare the current value with a threshold to determine whether the current is greater than the threshold. In some embodiments, the comparison circuit 122 converts the collected current into an electromagnetic signal by using a current transformer, and then determines whether the current is greater than a threshold value by comparing the strength of the electromagnetic signal. In some embodiments, the comparison circuit 122 may include a comparator, and the comparator may determine whether the current is greater than a threshold value by using the voltage signal of the collected current, which is not limited herein. In one embodiment, the comparison circuit 122 may comprise a comparator, and the detection circuit 121 may collect a current and generate a voltage signal according to the current. The comparison circuit 122 can obtain the voltage signal and determine whether the voltage signal is greater than a predetermined voltage signal. The preset voltage signal corresponds to a threshold value of the current. When the voltage signal is greater than the preset voltage signal, the processing circuit 123 determines that the current is greater than the threshold, and generates a disconnection signal, and the switching circuit 11 disconnects the corresponding power amplifier 30 from the power circuit 20 according to the disconnection signal; when the voltage signal is not greater than the preset voltage signal, the current is judged to be not greater than the threshold value, and at the moment, the current state of the switch circuit 11 can be maintained, and the normal work of the circuit is maintained.
It is noted that in some embodiments, the detection circuit 121 and the comparison circuit 122 may be integrated together to form the detection control circuit 12. The detection circuit 121 is a current detection resistor, and the comparison circuit 122 is a comparator, so that the detection control circuit 12 can be ensured to have compact structure, small volume and light weight, the detection precision is ensured, and the production cost can be reduced.
Referring to fig. 5, in some embodiments, step 023 includes:
0231: storing an overcurrent protection flag bit, wherein the overcurrent protection flag bit is endowed with an abnormal numerical value when the current is greater than a threshold value;
0232: the off signal is generated when the overcurrent protection flag is given an abnormal value.
Referring to fig. 2 and fig. 3 again, the protection method according to the embodiment of the present disclosure may be implemented by the protection circuit 10 according to the embodiment of the present disclosure. The protection circuit 10 includes a detection control circuit 12, the detection control circuit 12 includes a processing circuit 123, and the processing circuit 123 includes a memory 1231 and a controller 1232. The memory 1231 connects the comparing circuit 122 and the controller 1232. The memory 1231 is used to store an overcurrent protection flag, which is assigned an abnormal value when the current is greater than the threshold value. The controller 1232 generates a turn-off signal when the overcurrent protection flag is given an abnormal value.
In this way, when an abnormal value is given to the overcurrent protection flag, it is possible to determine that the corresponding power amplifier 30 is an abnormal power amplifier 30, and output a disconnection signal to disconnect the abnormal power amplifier 30 from the power supply circuit 20.
Specifically, the memory 1231 is used for storing an over-current protection flag bit, which may include a normal value and an abnormal value. The normal value may be represented by 0 and the abnormal value may be represented by 1. Thus, when the current is greater than the threshold, the over-current protection flag is given an abnormal value of 1, and the controller 1232 generates a turn-off signal.
In one embodiment, the comparing circuit 122 includes a comparator having a positive terminal and a negative terminal, the negative terminal receives a predetermined voltage signal, and the positive terminal receives a voltage signal corresponding to the current collected by the detecting circuit 121. When the voltage signal corresponding to the collected current is greater than the preset voltage signal, the comparator outputs a high level, and the overcurrent protection flag bit is given an abnormal value 1. The memory 1231 stores an overcurrent protection flag bit, and the controller 1232 acquires information in the memory 1231. When the controller 1232 acquires the abnormal value, it generates a disconnection signal, and the switch circuit 11 disconnects the corresponding power amplifier 30 from the power supply circuit 20 in accordance with the disconnection signal. When the voltage signal corresponding to the collected current is not greater than the preset voltage signal, the comparator outputs a low level, and the overcurrent protection zone bit is endowed with a normal value of 0. The memory 1231 stores the over-current protection flag bit, the controller 1232 acquires information in the memory 1231, and the controller 1232 does not acquire the abnormal value 1, so that the current state of the switch circuit 11 can be maintained, and the normal operation of the circuit can be maintained.
Referring to fig. 6, in some embodiments, the protection method further includes:
031: generating a connection signal to reconnect the power amplifier 30 with the power supply circuit 20 after generating the disconnection signal;
032: recording the times of the overcurrent protection zone bit given abnormal values;
033: and generating an abnormal signal when the number of times of the abnormal value is greater than the preset number, wherein the abnormal signal is used for determining that the communication between the corresponding power amplifier 30 and the power supply circuit 20 is abnormal.
Referring to fig. 2 and fig. 3 again, the protection method according to the embodiment of the present application can be implemented by the protection circuit 10 according to the embodiment of the present application. The protection circuit 10 includes a detection control circuit 12, the detection control circuit 12 includes a processing circuit 123, and the processing circuit 123 includes a controller 1232. The controller 1232 is configured to generate a connection signal after generating the disconnection signal to reconnect the power amplifier 30 and the power circuit 20, and the controller 1232 is configured to record the number of times that the overcurrent protection flag is given an abnormal value, and generate an abnormal signal when the number of times of the abnormal value is greater than a preset number, where the abnormal signal is used to determine that there is an abnormality in the communication between the corresponding power amplifier 30 and the power circuit 20.
Specifically, the controller 1232 generates a disconnection signal when the overcurrent protection flag is given an abnormal value, and disconnects the corresponding power amplifier 30 from the power supply circuit 20. The controller 1232 then generates a connection signal to reconnect the power amplifier 30 that was just disconnected from the power circuit 20. If the power amplifier 30 is damaged, the over-current protection flag is again given an abnormal value of 1, and the controller 1232 generates the turn-off signal again. When the number of times of the abnormal value 1 is greater than the preset number of times, the controller 1232 does not generate a connection signal any more after the generation of the abnormal signal, so that the switch circuit 11 and the power amplifier 30 can be kept in the off state. In this way, the abnormal signal can identify that the corresponding power amplifier 30 is in abnormal communication with the power supply circuit 20, and can accurately determine the abnormal power amplifier 30, thereby avoiding the occurrence of erroneous determination.
In some embodiments, the predetermined number of times may be 2, 3, 4, or more than 4, and is not limited herein.
In one embodiment, the power supply circuit 20 is configured to supply two power amplifiers 30, wherein one power amplifier 30 is a low frequency power amplifier and the other power amplifier 30 is a mid-to-high frequency band power amplifier. The circuit of the low-frequency power amplifier is larger than a threshold value, and an overcurrent protection flag bit is endowed with an abnormal value 1. When the low frequency power amplifier is disconnected from the power supply circuit 20, the current is given a normal value of 0 through the detection circuit 121, the comparison circuit 122 and the memory 1231, and the overcurrent protection flag is given an abnormal value of 1 again when the low frequency power amplifier is connected to the power supply circuit 20. The preset number of times may be 3 times, such that the abnormal signal is generated when the number of times of the abnormal value 1 is greater than 3 times.
Therefore, the low-frequency power amplifier can be determined to be an abnormal power amplifier, and the medium-high frequency power amplifier can be connected and closed at the moment, so that the medium-high frequency power amplifier can work normally, and the medium-high frequency power amplifier and the power circuit 20 are protected.
It should be noted that the above-mentioned examples and specific numerical values are provided for convenience of describing the implementation of the present application, and should not be construed as limiting the scope of the present application.
Referring to fig. 7, in some embodiments, the protection method further includes:
034: acquiring an abnormal signal and determining an abnormal power amplifier and a normal power amplifier according to the abnormal signal;
035: generating a disconnection signal to control the switching circuit 11 to disconnect the abnormal power amplifier from the power supply circuit 20;
036: a pass-through signal is generated to control the switching circuit 11 to pass the normal power amplifier through.
The protection method according to the embodiment of the present application can be implemented by the protection circuit 10 according to the embodiment of the present application. The protection circuit 10 includes a detection control circuit 12, the detection control circuit 12 includes a processing circuit 123, and the processing circuit 123 includes a controller 1232. The controller 1232 obtains the abnormal signal and determines the abnormal power amplifier and the normal power amplifier according to the abnormal signal, generates a disconnection signal to control the switching circuit 11 to disconnect the abnormal power amplifier from the power circuit 20, and generates a connection signal to control the switching circuit 11 to connect the normal power amplifier to the power circuit 20.
Specifically, the controller 1232 may obtain the abnormal signal, and the controller 1232 may determine that the corresponding power amplifier 30 is abnormal in communication with the power supply circuit 20 according to the abnormal signal, determine the power amplifier 30 as an abnormal power amplifier, and determine the power amplifiers 30 other than the abnormal power amplifier as normal power amplifiers. The normal power amplifier is connected with the switch circuit 11, and then the path current is normal. Therefore, the circuit can be ensured to be normally used.
Referring to fig. 8, the present application discloses a radio frequency device 100, where the radio frequency device 100 includes a radio frequency power circuit 21 and a protection circuit 10 according to any of the above embodiments, and the protection circuit 10 is used for protecting the radio frequency power circuit 21.
In the rf device 100 according to the embodiment of the present application, the detection control circuit 12 may be used to detect an abnormal circuit, and the detection control circuit 12 and the switching element may be used to disconnect the abnormal power amplifier 30 from the rf power circuit 21, so as to ensure that the other power amplifiers 30 can operate normally, and thus the abnormal circuit may be disconnected, and the power circuit 20 may be controlled to connect to the other power amplifiers 30, so as to protect the other power amplifiers 30 and the rf power circuit 21.
Specifically, the power supply circuit 20 includes a Radio frequency power supply circuit 21, and the Radio frequency power supply circuit 21 may be a Radio frequency power supply (RF), also referred to as an RF power supply. The RF power supply can generate a sine wave voltage of a fixed frequency, which is a power supply with a certain power in a radio frequency range. The RF power supply may power a plurality of power amplifiers 30.
An output terminal of the radio frequency transceiver 40 is connected to signal input terminals of the plurality of power amplifiers 30. The radio frequency transceiver 40 has a wireless transmission function, and the radio frequency transceiver 40 can transmit and receive wireless signals.
In one embodiment, the radio frequency transceiver 40 can transmit and receive 2G (second generation mobile communication technology) signals, 3G (third generation mobile communication technology) signals, 4G (fourth generation mobile communication technology) signals and 5G (fifth generation mobile communication technology) signals. The rf transceiver 40 may be a fully integrated single-chip rf transceiver, which can achieve low power consumption and high performance in the rf device 100, and has the characteristics of low current consumption, high sensitivity, and the like.
Referring again to fig. 2, the rf device 100 may include a plurality of antennas 50, and the plurality of antennas 50 may be the same or different, and is not limited herein. In one embodiment, the rf device 100 includes two antennas 50, and the two antennas 50 are respectively connected to the signal outputs of the two power amplifiers 30. The two antennas 50 are different antennas, and the two antennas 50 may have a difference in transmission frequency band or a difference in transmission performance.
Referring to fig. 9, the present application discloses an integrated power management device 200, where the integrated power management device 200 includes an integrated power circuit 22 and a protection circuit 10 according to any of the above embodiments, and the protection circuit 10 is used for protecting the integrated power circuit 22.
In some embodiments, the integrated power management device 200 may be disposed on a mobile phone, and the mobile phone includes a display, a camera, a Central Processing Unit (CPU), and a power amplifier 30. The power circuit 20 includes an integrated power circuit 22, and the integrated power circuit 22 may supply power to a display, a camera, a Central Processing Unit (CPU), and a power amplifier 30. The protection circuit 10 is used to protect the integrated power supply circuit 22.
In this way, the detection control circuit 12 and the switching element can disconnect the abnormal element from the integrated power supply circuit 22, thereby ensuring that other elements can work normally and protecting other elements and the integrated power supply circuit 22.
Referring to fig. 10, the present application discloses an electronic device 300, where the electronic device 300 includes a radio frequency device 100 and/or an integrated power management device 200, the electronic device 300 further includes a housing 310, and the radio frequency device 100 and/or the integrated power management device 200 are disposed in the housing 310.
The electronic device 1000 may include, but is not limited to, a cell phone, a smart watch, a tablet computer, a bluetooth headset, and the like. The electronic device 300 includes a housing 310, and the housing 310 may be a metal housing or a plastic housing, which is not limited herein. The housing 310 may protect the rf device 100 and/or the integrated power management device 200.
In one embodiment, the electronic device 300 includes the radio frequency device 100, the radio frequency device 100 includes a protection circuit 10 and a radio frequency power circuit 21, and the protection circuit 10 is used for protecting the radio frequency power circuit 21.
In another embodiment, the electronic device 300 includes the integrated power management apparatus 200, the integrated power management apparatus 200 includes the protection circuit 10 and the integrated power circuit 22, and the protection circuit 10 is used for protecting the integrated power circuit 22.
In another embodiment, including the rf device 100 and the integrated power management device 200 (as shown in fig. 9), the rf device 100 includes a protection circuit 10 and an rf power circuit 21, the protection circuit 10 is used to protect the rf power circuit 21, and the rf power circuit 21 can supply power to at least two power amplifiers 30; the integrated power management device 200 comprises a protection circuit 10 and an integrated power circuit 22, wherein the integrated power circuit 22 can supply power to a display screen, a camera and a central processing unit, and the protection circuit 10 is used for protecting the integrated power circuit 22.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (13)

1. A protection circuit for a power supply circuit for supplying power to at least two power amplifiers, the protection circuit comprising:
the at least two power amplifiers are connected with the power supply circuit through the switching circuit, and the switching circuit is used for connecting or disconnecting each power amplifier with the power supply circuit;
the detection control circuit is used for respectively detecting whether the current when each power amplifier is communicated with the power supply circuit is larger than a threshold value and generating a disconnection signal when the current is larger than the threshold value so as to disconnect the corresponding power amplifier from the power supply circuit.
2. The protection circuit of claim 1, wherein the detection control circuit comprises:
the detection circuit is connected with the power supply circuit and the switch circuit to collect the current;
the comparison circuit is connected with the detection circuit to judge whether the current is larger than the threshold value or not;
a processing circuit connected to the comparison circuit and the switching circuit and configured to generate the turn-off signal when the current is greater than the threshold.
3. The protection circuit of claim 2, wherein the processing circuit comprises a memory and a controller, the memory connects the comparison circuit and the controller, the memory is configured to store an over-current protection flag bit, the over-current protection flag bit is assigned an abnormal value when the current is greater than the threshold, and the controller generates the turn-off signal when the over-current protection flag bit is assigned the abnormal value.
4. The protection circuit of claim 3, wherein the controller is configured to generate a connection signal to reconnect the power amplifier to the power circuit after generating a disconnection signal, and the controller is configured to record a number of times that the over-current protection flag is assigned to the abnormal value, and generate an abnormal signal when the number of times that the abnormal value is greater than a preset number of times, the abnormal signal being used to determine that there is an abnormality in the communication between the corresponding power amplifier and the power circuit.
5. The protection circuit of claim 4, wherein the controller is configured to obtain the abnormal signal and determine an abnormal power amplifier and a normal power amplifier according to the abnormal signal, and generate the disconnection signal to disconnect the abnormal power amplifier from the power circuit; a pass-through signal is generated to pass through the normal power amplifier and the power supply circuit.
6. A protection method for a power supply circuit for supplying at least two power amplifiers, the protection method comprising:
communicating each of the power amplifiers with the power supply circuit; and
and detecting whether the current when each power amplifier is communicated with the power supply circuit is larger than a threshold value or not, and generating a disconnection signal when the current is larger than the threshold value so as to disconnect the corresponding power amplifier from the power supply circuit.
7. The protection method according to claim 6, wherein the step of detecting whether the current when each of the power amplifiers is in communication with the power circuit is greater than the threshold and generating an off signal when the current is greater than the threshold comprises:
collecting the current;
judging whether the current is larger than the threshold value; and
generating the turn-off signal when the current is greater than the threshold.
8. The protection method of claim 7, wherein the step of generating the turn-off signal when the current is greater than the threshold value comprises:
storing an over-current protection flag bit, which is assigned an abnormal value when the current is greater than the threshold value; and
the disconnect signal is generated when the over-current protection flag bit is assigned the abnormal value.
9. The protection method according to claim 8, characterized in that it comprises:
generating a connection signal to reconnect the power amplifier with the power supply circuit after generating the disconnection signal;
recording the times of the overcurrent protection zone bit endowed with the abnormal value; and
and generating an abnormal signal when the number of times of the abnormal value is greater than a preset number of times, wherein the abnormal signal is used for determining that the communication between the corresponding power amplifier and the power supply circuit is abnormal.
10. The protection method according to claim 9, characterized in that it comprises:
acquiring the abnormal signal and determining an abnormal power amplifier and a normal power amplifier according to the abnormal signal;
generating the disconnection signal to control the switching circuit to disconnect the abnormal power amplifier from the power supply circuit;
and generating a communication signal to control the switch circuit to communicate the normal power amplifier and the power supply circuit.
11. A radio frequency device comprising the protection circuit according to any one of claims 1 to 5 and a radio frequency power supply circuit, wherein the protection circuit is configured to protect the radio frequency power supply circuit.
12. An integrated power management device comprising the protection circuit of any one of claims 1 to 5 and an integrated power circuit, the protection circuit being configured to protect the integrated power circuit.
13. An electronic device comprising the radio frequency device of claim 11 and/or the integrated power management device of claim 12, the electronic device further comprising a housing, the radio frequency device and/or the integrated power management device being disposed within the housing.
CN202210612044.4A 2022-05-31 2022-05-31 Protection circuit, protection method, radio frequency device, management device and electronic equipment Pending CN115021201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210612044.4A CN115021201A (en) 2022-05-31 2022-05-31 Protection circuit, protection method, radio frequency device, management device and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210612044.4A CN115021201A (en) 2022-05-31 2022-05-31 Protection circuit, protection method, radio frequency device, management device and electronic equipment

Publications (1)

Publication Number Publication Date
CN115021201A true CN115021201A (en) 2022-09-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210612044.4A Pending CN115021201A (en) 2022-05-31 2022-05-31 Protection circuit, protection method, radio frequency device, management device and electronic equipment

Country Status (1)

Country Link
CN (1) CN115021201A (en)

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