Isolating circuit
By designing an isolation circuit in which a main control chip connects to multiple driver modules, the driver modules connect to multiple isolation modules, and the isolation modules connect to multiple output modules, the problem of high cost of traditional isolation circuits is solved, and circuit simplification and signal isolation are achieved.
Patent Information
- Application Number
- CN202422525635.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-10-18
AI Technical Summary
Traditional isolation circuits and isolation chips are expensive, increasing the cost of circuit usage.
An isolation circuit was designed, in which the main control chip can be connected to multiple driver modules, the driver modules can be connected to multiple isolation modules, and the isolation modules can be connected to multiple output modules. This one-to-many design simplifies the circuit structure.
By using a one-to-many design, circuit costs are saved while effective signal isolation is achieved.
Smart Images
Figure CN223713968U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic circuit technical field especially relates to an isolation circuit. BACKGROUND
[0002] When signal interaction is carried out between two mainboards / communication circuit boards, line connection is needed. However, if the line is too long and short circuit or interference occurs in the middle way, the two mainboards / communication circuit boards being signal-interacted will be affected. In order to avoid the influence of short circuit or interference on the two mainboards / communication circuit boards, an isolation circuit or an isolation chip needs to be added between the line and the mainboard / communication circuit board. However, the price of the traditional isolation circuit and the isolation chip is relatively high, which will increase the use cost of the circuit. SUMMARY
[0003] The utility model discloses a kind of isolation circuits, one drive module can connect multiple isolation modules, one isolation module can connect multiple output modules, specific quantity can be set according to actual demand, the design of one-to-many of the application simplifies circuit, saves cost.
[0004] To solve the above technical problems, the utility model adopts the following technical scheme:
[0005] An aspect of the utility model embodiment provides an isolation circuit, the isolation circuit includes: master control chip and at least one drive module, the input end of the at least one drive module is connected with the master control chip respectively;Any drive module in the at least one drive module is connected with at least one isolation module at the output end;Any isolation module in the at least one isolation module is connected with at least one output module at the output end.
[0006] In some embodiments, the drive module includes drive chip, first resistance, second resistance and first capacitor, at least one adjustment input end of the drive chip is connected with the master control chip respectively, at least one adjustment output end of the drive chip is connected with the isolation module, and the power input end of the drive chip receives input power.
[0007] In some embodiments, the isolation module includes transformer, NMOS tube, third resistance and first diode, the gate of the NMOS tube is connected with one end of the third resistance, the adjustment output end of the drive chip and the second electrode of the primary coil of the transformer, the drain of the NMOS tube is connected with the anode of the first diode and the first electrode of the primary coil of the transformer, the other end of the third resistance and the source of the NMOS tube are grounded, the cathode of the first diode is connected with input power, the transformer is provided with at least one secondary coil, and the at least one secondary coil of the transformer is connected with the output module.
[0008] In some embodiments, the isolation module further comprises a second capacitor, a positive electrode of the second capacitor is connected to a negative electrode of the first diode, and a negative electrode of the second capacitor is grounded.
[0009] In some embodiments, the output module comprises a second diode and a third capacitor, a positive electrode of the second diode is connected to a second electrode of the secondary coil of the transformer, a negative electrode of the second diode is connected to one end of the third capacitor, and an output power supply is output, and the other end of the third capacitor is connected to a first electrode of the secondary coil of the transformer.
[0010] In some embodiments, a turns ratio of the primary coil and the secondary coil of the transformer is 1:1.
[0011] According to the isolation circuit provided in the embodiment of the present application, the following beneficial effects are achieved: the main control chip can be connected to control multiple driving modules, one driving module can be connected to control multiple isolation modules, one isolation module can be connected to control multiple output modules, and the specific number can be set according to actual requirements, the design of one-to-many is adopted to simplify the circuit and save costs.
[0012] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0014] Figure 1 It is a principle block diagram of the isolation circuit according to the embodiment;
[0015] Figure 2 It is a circuit principle diagram of the driving module according to the embodiment;
[0016] Figure 3 It is a circuit principle diagram of the isolation module and the output module according to the embodiment. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0018] The terms "first", "second", "third", are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of the technical features indicated. Thus, features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.
[0019] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0020] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated into and constitute a part of this disclosure. Like reference numerals in the drawings represent like elements or sections thereof, and thus continuous numbering of elements in the drawings is not necessarily a continuous numbering of like elements in different drawings. The drawings are merely for explanatory purposes and are not necessarily drawn to scale. Identical reference numerals have been used, where possible, to designate corresponding elements.
[0021] The technical solutions of the embodiments of the present application will be briefly described below:
[0022] According to some embodiments, as Figure 1 The present application provides an isolation circuit, which comprises:
[0023] A master control chip and at least one drive module, the master control chip is connected to the input end of at least one drive module respectively;
[0024] The output end of any drive module in at least one drive module is connected with at least one isolation module;
[0025] The output end of any isolation module in at least one isolation module is connected with at least one output module.
[0026] As Figure 1 The master control chip can be connected to multiple drive modules, one drive module can be connected to multiple isolation modules, one isolation module can be connected to multiple output modules, the specific number can be set according to actual demand, compared with the traditional one-to-one design, the one-to-many design of the present application simplifies the circuit and saves the cost.
[0027] The accompanying drawings are incorporated in and constitute a part of this specification. Figures 1 to 3 The preferred embodiments of the present disclosure are further elaborated.
[0028] According to some embodiments, as shown in FIG. 1, the driving module comprises a driving chip U, a first resistor R1, a second resistor R2 and a first capacitor C1, the master control chip is connected to at least one adjusting input end of the driving chip U, at least one adjusting output end of the driving chip U is connected to the isolation module, and the power input end of the driving chip U receives the input power. Figure 2 Specifically, in some embodiments, the driving chip U is provided with a first adjusting input end PWM1, a second adjusting input end PWM2, a first adjusting output end PWM_1 and a second adjusting output end PWM_2, the master control chip is connected to the first adjusting input end PWM1 and the second adjusting input end PWM2 of the driving chip U, the driving chip U outputs a corresponding first pulse signal through the first adjusting output end PWM_1 according to the input signal of the first adjusting input end PWM1, and the driving chip U outputs a corresponding second pulse signal through the second adjusting output end PWM_2 according to the input signal of the second adjusting input end PWM2. Wherein, the first pulse signal and the second pulse signal are complementary.
[0029] According to some embodiments, as shown in FIG. 2, the isolation module comprises a transformer T, an NMOS tube QN, a third resistor R3 and a first diode D1, the gate of the NMOS tube QN is connected to one end of the third resistor R3, the adjusting output end of the driving chip U and the second electrode of the primary coil of the transformer T, the drain of the NMOS tube QN is connected to the anode of the first diode D1 and the first electrode of the primary coil of the transformer T, the other end of the third resistor R3 and the source of the NMOS tube QN are grounded, the cathode of the first diode D1 is connected to the input power, the transformer T is provided with at least one secondary coil, and at least one secondary coil of the transformer T is connected to the output module.
[0030] Figure 3 Wherein, the turns ratio of the primary coil and the secondary coil of the transformer T is 1:1, the transformer T is not used as a step-up or step-down, but as an isolation, so the turns of the primary coil and the secondary coil are the same. As shown in FIG. 3, the input of the primary coil of the transformer T is 5V, and the output of the secondary coil of the transformer T is also 5V. However, in specific embodiments, there is a loss in the circuit, so the input of the primary coil of the transformer T is a little higher than 5V (such as 5.5V), so that the secondary coil of the transformer T can output 5V.
[0031] Further, as shown in FIG. 4, the output module comprises a second diode D2, a third capacitor C2 and a third resistor R4, the anode of the second diode D2 is connected to the output of the transformer T, the cathode of the second diode D2 is connected to the third capacitor C2, the third capacitor C2 is connected to the third resistor R4, and the third resistor R4 is connected to the input of the driving chip U. Figure 3 Further, as shown in FIG. 5, the output module comprises a second diode D2, a third capacitor C2 and a third resistor R4, the anode of the second diode D2 is connected to the output of the transformer T, the cathode of the second diode D2 is connected to the third capacitor C2, the third capacitor C2 is connected to the third resistor R4, and the third resistor R4 is connected to the input of the driving chip U.
[0032] Figure 3 As shown, the isolation module further comprises a second capacitor C2, a positive electrode of the second capacitor C2 is connected to a negative electrode of the first diode D1, and a negative electrode of the second capacitor C2 is grounded.
[0033] The working principle of the above embodiment is that the first adjustment output end PWM_1 outputs a pulse signal, when the pulse signal is a high level signal, the current flows through the primary coil of the transformer T and is input to the positive electrode of the first diode D1 and the drain electrode of the NMOS tube QN, at the same time, the high level signal makes the NMOS tube QN conduct, so that the primary coil of the transformer T is electrified, and then the secondary coil of the transformer T induces an output current. When the pulse signal is a low level signal, the NMOS tube QN is turned off, the primary coil of the transformer T flows through the first diode D1, and charges the second capacitor C2. The pulse signal output by the first adjustment output end PWM_1 keeps the primary coil of the transformer T electrified, and further makes the secondary coil of the transformer T also exist an induced output current.
[0034] According to some embodiments, as Figure 3 As shown, the output module comprises a second diode D2 and a third capacitor C3, a positive electrode of the second diode D2 is connected to a second electrode of the secondary coil of the transformer T, a negative electrode of the second diode D2 is connected to one end of the third capacitor C3, and an output power supply is output, and the other end of the third capacitor C3 is connected to a first electrode of the secondary coil of the transformer T.
[0035] Among them, the second diode D2 can prevent the current from flowing in reverse. The transformer T is provided with one primary coil, and the secondary coil can be provided with at least one or more, and the number of the secondary coil can be set according to actual needs. In some specific embodiments, as Figure 3 As shown, the secondary coil is provided with two, and both of them obtain induced current through the primary coil of the transformer T.
[0036] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0037] Although the present disclosure has been described with reference to several exemplary embodiments, it will be understood that the terms used are illustrative and not restrictive, and the present disclosure is not limited to any of the aforementioned details. Since the present disclosure can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to the details thereof but are to be interpreted broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. An isolation circuit, characterized by, The isolation circuit comprises: a master control chip and at least one driving module, the master control chip being connected to the input end of the at least one driving module; the output end of any driving module in the at least one driving module being connected to at least one isolation module; the output end of any isolation module in the at least one isolation module being connected to at least one output module; the driving module comprising a driving chip, a first resistor, a second resistor and a first capacitor, the master control chip being connected to at least one adjusting input end of the driving chip, at least one adjusting output end of the driving chip being connected to the isolation module, and the power input end of the driving chip receiving an input power supply; the isolation module comprising a transformer, an NMOS tube, a third resistor and a first diode, the gate of the NMOS tube being connected to one end of the third resistor, the adjusting output end of the driving chip and the second electrode of the primary coil of the transformer, the drain of the NMOS tube being connected to the anode of the first diode and the first electrode of the primary coil of the transformer, the other end of the third resistor and the source of the NMOS tube being grounded, the cathode of the first diode being connected to an input power supply, the transformer being provided with at least one secondary coil, and at least one secondary coil of the transformer being connected to the output module.
2. The isolation circuit of claim 1, wherein, The isolation module further comprises a second capacitor, the anode of the second capacitor being connected to the cathode of the first diode, and the cathode of the second capacitor being grounded.
3. The isolation circuit of claim 1, wherein, The output module comprises a second diode and a third capacitor, the anode of the second diode being connected to the second electrode of the secondary coil of the transformer, the cathode of the second diode being connected to one end of the third capacitor and outputting an output power supply, and the other end of the third capacitor being connected to the first electrode of the secondary coil of the transformer.
4. The isolation circuit of claim 1, wherein, The turns ratio of the primary coil and the secondary coil of the transformer is 1:1.