CN214480281U - Circuit for controlling power supply module to output level according to time sequence by digital signal - Google Patents
Circuit for controlling power supply module to output level according to time sequence by digital signal Download PDFInfo
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- CN214480281U CN214480281U CN202022156616.1U CN202022156616U CN214480281U CN 214480281 U CN214480281 U CN 214480281U CN 202022156616 U CN202022156616 U CN 202022156616U CN 214480281 U CN214480281 U CN 214480281U
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Abstract
The utility model relates to a circuit of digital signal control power module according to chronogenesis output level, it utilizes 3 digit signal to constitute the chronogenesis control truth table, and the transmitting terminal of an opto-coupler can be opened to each digit digital signal, and the receiving terminal series resistance of opto-coupler inserts power module's Trim end respectively, and through the programming control to 3 digit digital signal, the Trim end time sharing chronogenesis that realizes power module inserts different resistance to its output level is switched to the control module power. The photoelectric coupler has the function of isolating digital signals from analog signals, so that mutual interference can be reduced under the condition of requirement. The utility model has the advantages that, area occupied is less, and is simple and convenient, makes the power module of high-power output switch between different output levels and realizes the circuit of digital signal control power module according to chronogenesis output level of digital control.
Description
Technical Field
The utility model belongs to the electron field, concretely relates to circuit of digital signal control power module according to chronogenesis output level.
Background
In the electronic field, the power module is widely used in communication directions such as switching equipment, mobile communication, microwave communication, access equipment, optical transmission, routers and the like, automotive electronics, aerospace and the like. The power supply system built by adopting the modules has the characteristics of short design period, high reliability, easy system upgrade and the like, so that the power supply modules are more and more widely applied. Especially, in recent years, due to rapid development of data services and continuous popularization of distributed power supply systems, the amplification of power supply modules has exceeded that of primary power supplies. With the great use of semiconductor technology, packaging technology and high-frequency soft switches, the power density of the power supply module is higher and higher, the conversion efficiency is higher and higher, and the application is simpler and simpler.
The power module with high power and large current output usually comprises an analog circuit, and the control quantity and the controlled quantity of the output voltage of the power module are also usually analog signals. With the continuous development of computer technology, the digitization technology has always kept rapid progress in recent decades, and the current society has been kept away from the convenience brought by the digital circuit. The use of digital circuits for signal processing is also becoming a trend. The power supply field is used as the final fortress of digital circuit breakthrough and is seeking new opportunities of digital control and digital processing.
At present, common mainstream power supply modules in the market are provided with Trim terminals for realizing output voltage regulation, but the recommended voltage regulation mode is mostly realized by adopting resistance value analog quantity voltage regulation, can not meet the requirement of digital control, and is more difficult to realize the function of outputting the level according to the set time sequence.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, providing an area occupied is less, and is simple and convenient, makes the power module of high-power output switch between different output levels and realizes the circuit of digital signal control power module according to chronogenesis output level of digital control.
In order to achieve the above object, the utility model provides a following technical scheme:
a circuit for controlling a power module to output level according to time sequence by using digital signals of 3 bits utilizes a time sequence control truth table formed by the digital signals of 3 bits, each digital signal can open a transmitting end of an optical coupler, receiving ends of the optical couplers are connected with resistors in series and are respectively connected with Trim ends of the power module, the Trim ends of the power module are connected with different resistors in time sequence through programming control of the digital signals of 3 bits, and therefore the power of the control module switches the output level. The photoelectric coupler has the function of isolating digital signals from analog signals, so that mutual interference can be reduced under the condition of requirement.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) the power supply module with high power output is switched among different output levels to realize digital control;
2) the 3-bit digital signal described in the patent can be expanded, and the bit number of the digital signal can be increased to program the output of the power module according to the requirement of a data system;
3) the utility model has simple method, and can be well mastered by designers and applied to actual design;
4) the control part occupies a small area, and a PCB can be arranged on the back of the power module to realize digital control.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required to be used in the description of the embodiment will be briefly introduced below, it is obvious that the drawings in the following description are only for more clearly illustrating the embodiment of the present invention or the technical solution in the prior art, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a schematic diagram of the circuit design of the present invention;
fig. 2 is a diagram of an example of the design of the PCB board of the circuit of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described with reference to the following specific embodiments, which are provided as illustration only and are not intended to limit the present invention.
Fig. 1 shows a circuit for controlling a power supply module to output a level according to a time sequence by a digital signal, wherein U1 is the power supply module, pin 6 of U1 is Trim terminal, U3 to U5 are photocouplers, three terminals a1, a2 and A3 are 3-bit digital signals, which are respectively connected to anodes of diode emitters of the three photocouplers U3 to U5, and cathodes of the emitters are connected to a digital ground; and the receiving ends of three photoelectric couplers from U3 to U5 are connected in series with three different resistors R2, R5 and R8 and are connected between the Trim end of the power supply module and the analog ground in parallel.
The working principle is as follows:
when the A1, A2 and A3 three-bit digital signal bit is 100, the anode of the diode emitting end of the photoelectric coupler of the U3 is at a high level, the diode emits light, the base level of the receiving end of the photoelectric coupler of the U3 receives an optical signal, the triode is conducted, and the Trim end of the power supply module is connected with the analog ground in parallel to form R2, so that the output level of Vo1 is realized;
when the A1, A2 and A3 three-bit digital signal bit 010 is detected, the anode of the diode emitting end of the photoelectric coupler of the U4 is at a high level, the diode emits light, the base level of the receiving end of the photoelectric coupler of the U4 receives an optical signal, the triode is conducted, and the Trim end of the power supply module is connected with the analog ground in parallel to form an R5, so that the output level of Vo2 is realized;
when the A1, A2 and A3 three-bit digital signal bit 001, the anode of the diode emitting end of the photoelectric coupler of U5 is at high level, the diode emits light, the base level of the receiving end of the photoelectric coupler of U5 receives a light signal, the triode is conducted, and the Trim end of the power module is connected with the analog ground in parallel to form R8, so that the output level of Vo3 is realized;
through digital control of A1, A2 and A3, three levels of Vo1, Vo2 and Vo3 with time sequences can be output, and through adjusting the resistance values of R2, R5 and R8, three levels of voltages of Vo1, Vo2 and Vo3 can be edited.
D1 is an output anti-back-flow diode, which can prevent the current from flowing back when switching from high potential to low potential during the level switching process.
All the other devices are filtering and protecting, and are irrelevant to the function of the utility model.
Fig. 2 shows an example of the PCB design of the circuit of the present invention. The control circuits are all arranged on the Top surface of the PCB, the total area of the control circuits is smaller than the area of the power supply module, and extra PCB area resources are not occupied. Except for D1, the signals are small signals, and the line width of 1mm can meet the requirement.
The present invention is not described in detail in the prior art.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A kind of digital signal control power module outputs the circuit of the level according to the time sequence, including power module and photoelectric coupler, characterized by, also include 3 digital signals, the said 3 digital signals insert the diode transmitting terminal positive pole of three photoelectric couplers separately, the diode transmitting terminal negative pole connects the digital ground; the receiving ends of the three photoelectric couplers are connected in series with three different resistors and are connected between the Trim end of the power module and the analog ground in parallel.
2. The circuit according to claim 1, wherein the power module has 8 pins, and 6 pins are Trim terminals.
3. The circuit of claim 1, wherein the optocoupler is configured to isolate the digital signal from the analog signal.
4. A circuit for controlling a power module to output level according to any one of claims 1 to 3, wherein the Trim terminal of the power module is connected to different resistors in a time-sharing manner, so as to control the power supply of the module to switch its output level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022156616.1U CN214480281U (en) | 2020-09-27 | 2020-09-27 | Circuit for controlling power supply module to output level according to time sequence by digital signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022156616.1U CN214480281U (en) | 2020-09-27 | 2020-09-27 | Circuit for controlling power supply module to output level according to time sequence by digital signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214480281U true CN214480281U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022156616.1U Active CN214480281U (en) | 2020-09-27 | 2020-09-27 | Circuit for controlling power supply module to output level according to time sequence by digital signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214480281U (en) |
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2020
- 2020-09-27 CN CN202022156616.1U patent/CN214480281U/en active Active
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