CN109547120B - Signal transmission method, transmission control circuit and switching power supply using same - Google Patents
Signal transmission method, transmission control circuit and switching power supply using same Download PDFInfo
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- CN109547120B CN109547120B CN201811633280.4A CN201811633280A CN109547120B CN 109547120 B CN109547120 B CN 109547120B CN 201811633280 A CN201811633280 A CN 201811633280A CN 109547120 B CN109547120 B CN 109547120B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval
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Abstract
The invention provides a signal transmission method, a transmission control circuit and a switching power supply using the same, wherein a first circuit transmits pulse signals to a second circuit through a single data line, when the pulse signals are single pulse signals, the pulse width of the single pulse signals represents first information, and the frequency of the single pulse signals represents second information; when the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal represents third information, and the time interval between the two pulses of one double pulse of the double pulse signal represents fourth information. The invention only needs one data line to transmit pulse signals, and signal transmission is not interfered.
Description
Technical Field
The present invention relates to the field of power electronics, and in particular, to a signal transmission method, a transmission control circuit, and a switching power supply using the same.
Background
In the prior art, referring to fig. 1, a first circuit transmits signals to a second circuit through a plurality of data lines, wherein one data line transmits a clock pulse signal, and the other data lines respectively transmit analog signals such as a current signal, a voltage signal, a signal representing a switching frequency and the like, but the analog signals are easily interfered and distorted in the signal transmission process, so that the control performance of the circuit is affected.
Disclosure of Invention
The invention aims to provide a signal transmission method, a transmission control circuit and a switching power supply using the same, which are used for solving the problem that the analog signal transmission process is interfered in the prior art.
In order to achieve the above object, the present invention provides a signal transmission method, in which a first circuit transmits a pulse signal to a second circuit through a single data line, and when the pulse signal is a single pulse signal, a pulse width of the single pulse signal represents first information, and a frequency of the single pulse signal represents second information; when the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal represents third information, and the time interval between the two pulses of one double pulse of the double pulse signal represents fourth information.
Optionally, the pulse widths of two pulses of the double pulse signal respectively characterize the fifth information and the sixth information.
Optionally, when the pulse signal is a single pulse signal, a pulse width of the single pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the first information is voltage, current or switching frequency.
Optionally, when the pulse signal is a single pulse signal, the frequency of the single pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the second information is voltage, current or switching frequency.
Optionally, when the pulse signal is a double pulse signal, a time interval between rising edges or falling edges of two pulses which are not adjacent in the double pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the third information is voltage, current or switching frequency.
Optionally, when the pulse signal is a double pulse signal, the time interval between two pulses of one double pulse of the double pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the fourth information is voltage, current or switching frequency.
Optionally, when the pulse signal is a double pulse signal, the pulse width of the first pulse and the pulse width of the second pulse of the double pulse signal are set according to the signal generated by the first circuit, the signal set by the first circuit, or the signal received by the first circuit, and the fifth information and the sixth information are voltage, current or switching frequency.
The invention also provides a signal transmission control circuit, which comprises a first circuit and a second circuit, wherein the first circuit transmits pulse signals to the second circuit through a single data line, when the pulse signals are single pulse signals, the pulse width of the single pulse signals represents first information, and the frequency of the single pulse signals represents second information; when the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal represents third information, and the time interval between the two pulses of one double pulse of the double pulse signal represents fourth information.
Optionally, the pulse widths of two pulses of the double pulse signal respectively characterize the fifth information and the sixth information.
Optionally, when the pulse signal is a single pulse signal, a pulse width of the single pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the first information is voltage, current or switching frequency.
Optionally, when the pulse signal is a single pulse signal, the frequency of the single pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the second information is voltage, current or switching frequency.
Optionally, when the pulse signal is a double pulse signal, a time interval between rising edges or falling edges of two pulses which are not adjacent in the double pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the third information is voltage, current or switching frequency.
Optionally, when the pulse signal is a double pulse signal, the time interval between two pulses of one double pulse of the double pulse signal is set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the fourth information is voltage, current or switching frequency.
Optionally, when the pulse signal is a double pulse signal, the pulse width of the first pulse and the pulse width of the second pulse of the double pulse signal are set according to the signal generated by the first circuit, the signal set by the first circuit, or the signal received by the first circuit, and the fifth information and the sixth information are voltage, current or switching frequency.
The invention also provides a switching power supply which comprises any one of the signal transmission control circuits and the main switching tube, wherein the output end of the second circuit of the transmission control circuit is connected with the control end of the main switching tube, and pulse signals transmitted by the first circuit to the second circuit are used for controlling the switching state of the main switching tube.
Compared with the prior art, the invention has the following advantages: the first circuit transmits a pulse signal to the second circuit through a single data line, when the pulse signal is a single pulse signal, the pulse width of the single pulse signal represents first information, and the frequency of the single pulse signal represents second information; when the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal represents third information, the time interval between the two pulses of one double pulse signal represents fourth information, and the pulse widths of the two pulses of the double pulse signal represent fifth information and sixth information respectively. The invention only needs one data line to transmit pulse signals, and signal transmission is not interfered.
Drawings
FIG. 1 is a schematic diagram of a prior art signal transmission control circuit;
FIG. 2 is a schematic diagram of a signal transmission control circuit according to the present invention;
FIG. 3 is a waveform diagram illustrating the principle of signal transmission according to the present invention;
FIG. 4 is a waveform diagram of a dual pulse signal according to the present invention;
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments only. The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention.
In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. It should be noted that the drawings are in a simplified form and are not to scale in order to facilitate a clear and concise description of embodiments of the present inventions.
As shown in FIG. 2, a schematic circuit diagram of the signal transmission control circuit of the invention is illustrated, the circuit diagram comprises a first circuit and a second circuit, the first circuit transmits pulse signals to the second circuit through a single data line, the switching power supply comprises the first circuit, the second circuit and a main switching tube, the output end of the second circuit is connected with the control end of the main switching tube, and the pulse signals transmitted by the first circuit to the second circuit are used for controlling the switching state of the main switching tube in the switching power supply. The pulse signal transmitted by the first circuit to the second circuit may be indicative of current, voltage, switching frequency, etc. signals transmitted by the first circuit to the second circuit. The pulse signal is a single pulse signal or a double pulse signal, when the pulse signal is a single pulse signal, the pulse width of the single pulse signal represents first information, and the frequency of the single pulse signal represents second information; when the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal represents third information, the time interval between the two pulses of one double pulse signal represents fourth information, and the pulse widths of the two pulses of the double pulse signal represent fifth information and sixth information respectively. The transmission of the single pulse signal and the transmission of the double pulse signal are two schemes under the thought of the invention, and the simultaneous transmission of the single pulse signal and the double pulse signal or the transmission of one signal is the protection scope of the invention. When the pulse signal is a single pulse signal, the pulse width and the frequency of the single pulse signal are set according to the signal generated by the first circuit, the signal set by the first circuit, or the signal received by the first circuit, and the first information and the second information can be voltage, current, switching frequency or the like. When the pulse signal is a double pulse signal, according to the signal generated by the first circuit, or the signal set by the first circuit, or the signal received by the first circuit, setting the time interval between the rising edges or the falling edges of two non-adjacent pulses in the single pulse signal, the time interval between the two pulses, the pulse width of the first pulse of the double pulse signal and the pulse width of the second pulse of the double pulse signal, wherein the third information, the fourth information, the fifth information and the sixth information can be voltage, current or switching frequency signals and the like. The information represented by the pulse signal is used for controlling the switching state of the main switching tube, namely the information represented by the pulse signal can be used for controlling the switching period of the main switching tube and also can be used for controlling the peak current, the output voltage and the like of the switching power supply. Typically, the pulse width of the single pulse signal is used to control the switching period of the main switching tube.
As shown in fig. 3, a signal transmission waveform diagram of the present invention is illustrated, the waveform diagram illustrates the relationship between the frequency Freq of the single pulse signal and the peak current Ipk that the first circuit needs to transmit to the second circuit, and the frequency Freq of the pulse signal represents the peak current Ipk of the second information.
As shown in fig. 4, a waveform diagram of a double pulse signal of the present invention is illustrated, wherein a time interval between two rising edges of two non-adjacent pulses in the double pulse signal is Ts, and represents third information; the time interval between two rising edges of two pulses of one double pulse of the double pulse signal is Tp, and fourth information is represented; the first pulse width of the double pulse signal is D1, and fifth information is represented; the second pulse width of the double pulse signal is D2, which represents the sixth information, and the third information, the fourth information, the fifth information, the sixth information can be voltage, current or switching frequency signals. In fig. 4, ts and Tp are only an embodiment, and the time intervals between the rising edge and the falling edge, between the falling edge and the rising edge, and between the falling edge and the rising edge of two non-adjacent pulses may be Ts, which represents the third information; the two pulses that are not adjacent to each other are not necessarily separated by one pulse in the middle, but may be separated by a plurality of pulses in the middle. Likewise, the time intervals between the rising edge and the falling edge, between the falling edge and the rising edge, and between the falling edge and the rising edge of one double pulse of the double pulse signal may be Tp, which characterizes the fourth information.
Although the embodiments have been described and illustrated separately above, and with respect to a partially common technique, it will be apparent to those skilled in the art that alternate and integration may be made between embodiments, with reference to one embodiment not explicitly described, and reference may be made to another embodiment described.
The above-described embodiments do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present invention.
Claims (7)
1. A signal transmission method, characterized in that: the first circuit transmits pulse signals to the second circuit through a single data line; when the pulse signal is a single pulse signal, the pulse width of the single pulse signal represents first information, and the frequency of the single pulse signal represents second information; when the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal represents the third information, and the time interval between the two pulses of one double pulse of the double pulse signal represents the fourth information
When the pulse signal is a single pulse signal, the pulse width and the frequency of the single pulse signal are set according to the signal generated by the first circuit, or the signal set by the first circuit, or the signal received by the first circuit, and the first information and the second information are voltage, current or switching frequency;
When the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal is set according to the signal generated by the first circuit, or the signal set by the first circuit, or the signal received by the first circuit, and the time interval between the two pulses of one double pulse of the double pulse signal is set, and the third information and the fourth information are voltage, current or switching frequency.
2. The signal transmission method according to claim 1, wherein: the pulse widths of two pulses of the double pulse signal respectively characterize fifth information and sixth information.
3. The signal transmission method according to claim 2, wherein: when the pulse signal is a double pulse signal, the pulse width of the first pulse and the pulse width of the second pulse of the double pulse signal are set according to the signal generated by the first circuit, the signal set by the first circuit or the signal received by the first circuit, and the fifth information and the sixth information are voltage, current or switching frequency.
4. A signal transmission control circuit, characterized in that: the signal transmission control circuit comprises a first circuit and a second circuit, wherein the first circuit transmits pulse signals to the second circuit through a single data line, when the pulse signals are single pulse signals, the pulse width of the single pulse signals represents first information, and the frequency of the single pulse signals represents second information; when the pulse signal is a double pulse signal, the time interval between the rising edges or the falling edges of two non-adjacent pulses in the double pulse signal represents third information, and the time interval between the two pulses of one double pulse of the double pulse signal represents fourth information;
When the pulse signal is a single pulse signal, the pulse width and the frequency of the single pulse signal are set according to the signal generated by the first circuit, or the signal set by the first circuit, or the signal received by the first circuit, and the first information and the second information are voltage, current or switching frequency;
When the pulse signal is a double pulse signal, a time interval between rising edges or falling edges of two non-adjacent pulses in the double pulse signal and a time interval between two pulses of one double pulse of the double pulse signal are set according to a signal generated by the first circuit, or a signal set by the first circuit, or a signal received by the first circuit, and the third information and the fourth information are voltage, current or switching frequency.
5. The signal transmission control circuit according to claim 4, wherein: the pulse widths of two pulses of the double pulse signal respectively characterize fifth information and sixth information.
6. The signal transmission control circuit according to claim 5, wherein: when the pulse signal is a double pulse signal, the pulse width of the first pulse and the pulse width of the second pulse of the double pulse signal are set according to the signal generated by the first circuit, the signal set by the first circuit or the signal received by the first circuit, and the fifth information and the sixth information are voltage, current or switching frequency.
7. A switching power supply, characterized by: the switching power supply comprises the signal transmission control circuit and a main switching tube according to any one of claims 4-6, wherein the output end of a second circuit of the transmission control circuit is connected with the control end of the main switching tube, and a pulse signal transmitted from a first circuit to the second circuit is used for controlling the switching state of the main switching tube.
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| CN201811633280.4A CN109547120B (en) | 2018-12-29 | 2018-12-29 | Signal transmission method, transmission control circuit and switching power supply using same |
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| CN201811633280.4A CN109547120B (en) | 2018-12-29 | 2018-12-29 | Signal transmission method, transmission control circuit and switching power supply using same |
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| CN109547120B true CN109547120B (en) | 2024-05-24 |
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| CN1307407A (en) * | 2000-01-21 | 2001-08-08 | 周振权 | Pulse signal transmitting method in power line |
| CN202939188U (en) * | 2012-11-23 | 2013-05-15 | 中国西电电气股份有限公司 | Signal conditioning circuit |
| CN103544128A (en) * | 2013-10-28 | 2014-01-29 | 无锡中星微电子有限公司 | Inter-chip single signal line communication method, device and system |
| CN104348587A (en) * | 2013-08-02 | 2015-02-11 | 盛群半导体股份有限公司 | Single-wire signal transmission device and transmission method |
| CN108061564A (en) * | 2017-12-15 | 2018-05-22 | 中国电子科技集团公司第四十研究所 | A kind of incremental encoder phase signal single wire transmission identification and synchronous method |
| CN108427345A (en) * | 2018-03-15 | 2018-08-21 | 广州视源电子科技股份有限公司 | Load equipment control method, device and system based on square wave pulse signal |
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2018
- 2018-12-29 CN CN201811633280.4A patent/CN109547120B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307407A (en) * | 2000-01-21 | 2001-08-08 | 周振权 | Pulse signal transmitting method in power line |
| CN202939188U (en) * | 2012-11-23 | 2013-05-15 | 中国西电电气股份有限公司 | Signal conditioning circuit |
| CN104348587A (en) * | 2013-08-02 | 2015-02-11 | 盛群半导体股份有限公司 | Single-wire signal transmission device and transmission method |
| CN103544128A (en) * | 2013-10-28 | 2014-01-29 | 无锡中星微电子有限公司 | Inter-chip single signal line communication method, device and system |
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