CN220857890U - Power supply feedback circuit, power supply system and vehicle - Google Patents
Power supply feedback circuit, power supply system and vehicle Download PDFInfo
- Publication number
- CN220857890U CN220857890U CN202321221562.XU CN202321221562U CN220857890U CN 220857890 U CN220857890 U CN 220857890U CN 202321221562 U CN202321221562 U CN 202321221562U CN 220857890 U CN220857890 U CN 220857890U
- Authority
- CN
- China
- Prior art keywords
- power supply
- feedback
- resistor
- control module
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims description 26
- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000008713 feedback mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The application discloses a power supply feedback circuit, a power supply system and a vehicle, wherein the power supply feedback circuit comprises a power supply control module and a power supply feedback module; the power supply control module is connected with the power supply feedback module, and the power supply feedback module is connected with the load end; the power supply feedback module is used for providing far-end feedback or near-end feedback for the power supply control module according to the impedance of the load end. Based on the scheme of the application, the power supply feedback module supports two feedback modes of far-end feedback and near-end feedback, and switches between the far-end feedback and the near-end feedback according to the impedance of the load end. Even if the power supply remote feedback connection fails, the power supply feedback module can provide the near-end feedback for the power supply control module, so that the power supply output imbalance is avoided, and the safety of the power supply output is effectively improved.
Description
Technical Field
The present application relates to the field of electronic circuits, and in particular, to a power supply feedback circuit, a power supply system, and a vehicle.
Background
The intelligent degree of the automobile is gradually improved, supported functions are also more and more abundant, and some functions have higher requirements on safety, such as instrument display and gateway communication of the automobile, and the functions are realized based on a vehicle-mounted main control chip. Therefore, it is necessary to ensure that a safe and stable power supply is provided to the main control chip.
The power supply of the main control chip generally has the characteristics of low voltage, high current, obvious load dynamic characteristics and the like, and the feedback is generally carried out at the far end of the power supply, namely the load end, so that more real feedback can be obtained, and the power supply to the main control chip can be accurately regulated. The traditional power supply feedback mode related to the main control chip is power supply remote feedback, adopts single-point connection to the remote end, and if the power supply remote feedback connection fails, the power supply output is out of balance.
Disclosure of utility model
The application mainly aims to provide a power supply feedback circuit, a power supply system and a vehicle, and aims to solve the problem of power supply output imbalance caused by power supply remote feedback connection failure.
In order to achieve the above object, the present application provides a power supply feedback circuit, which includes a power supply control module and a power supply feedback module;
The power supply control module is connected with the power supply feedback module, and the power supply feedback module is connected with the load end;
the power supply feedback module is used for providing far-end feedback or near-end feedback for the power supply control module according to the impedance of the load end.
Optionally, the power supply feedback module comprises a proximal feedback unit and a distal feedback unit; the near-end feedback unit is connected with the power supply control module, and the far-end feedback unit is connected with the power supply control module;
The near-end feedback unit is used for providing near-end feedback for the power supply control module when the load end meets the preset high-impedance condition;
The remote feedback unit is used for providing remote feedback for the power supply control module when the load end meets the preset low-impedance condition.
Optionally, the first end of the remote feedback unit is connected with the voltage output end of the power supply control module;
The second end of the remote feedback unit is connected with the power supply end of the load end;
The third end of the remote feedback unit is connected with the output voltage feedback end of the power supply control module;
The fourth end of the far-end feedback unit is connected with the grounding end of the load end;
the fifth end of the remote feedback unit is connected with the grounding end.
Optionally, the first end of the remote feedback unit is connected with the power supply end of the load end;
The second end of the remote feedback unit is connected with the output voltage feedback end of the power supply control module;
The third end of the remote feedback unit is connected with the grounding end of the load end.
Optionally, the proximal feedback unit includes a first resistor, a second resistor, a third resistor, and a fourth resistor; the distal feedback unit includes the second resistor and the third resistor;
The first end of the first resistor is connected with the voltage output end of the power supply control module, and the second end of the first resistor is connected with the power supply end of the load end; the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is connected with the output voltage feedback end of the power supply control module; the first end of the third resistor is connected with the second end of the second resistor, and the second end of the third resistor is connected with the grounding end of the load end; the first end of the fourth resistor is connected with the second end of the third resistor, and the second end of the fourth resistor is connected with the grounding end.
Optionally, the sum of the resistances of the first resistor and the fourth resistor is smaller than the sum of the resistances of the second resistor and the third resistor.
Optionally, the power supply feedback module further comprises a feedforward capacitor; the first end of the second resistor is connected with the first end of the feedforward capacitor, and the second end of the second resistor is connected with the second end of the feedforward capacitor.
Optionally, the power control module is a DC/DC power controller;
And the DC/DC power supply controller is used for adjusting the voltage output to the load terminal according to the feedback of the power supply feedback module.
The embodiment of the application also provides a power supply system which comprises the power supply feedback circuit.
The embodiment of the application also provides a vehicle, which comprises the power supply system.
The embodiment of the application provides a power supply feedback circuit, a power supply system and a vehicle, wherein the power supply feedback circuit comprises a power supply control module and a power supply feedback module; the power supply control module is connected with the power supply feedback module, and the power supply feedback module is connected with the load end; the power supply feedback module is used for providing far-end feedback or near-end feedback for the power supply control module according to the impedance of the load end. Based on the scheme of the application, the power supply feedback module supports two feedback modes of far-end feedback and near-end feedback, and switches between the far-end feedback and the near-end feedback according to the impedance of the load end. Therefore, even if the power supply remote feedback connection fails, the power supply feedback module can provide the near-end feedback for the power supply control module, so that the power supply output imbalance is avoided, and the safety of the power supply output is effectively improved.
Drawings
FIG. 1 is a schematic diagram of a power feedback circuit according to an embodiment of the application;
FIG. 2 is a schematic diagram of another embodiment of the power feedback circuit of the present application;
FIG. 3 is a schematic diagram of a power supply feedback circuit according to another embodiment of the present application;
fig. 4 is a schematic diagram of a power supply feedback circuit according to another embodiment of the application.
Reference numerals illustrate:
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of the "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
The application provides a power supply feedback circuit. Referring to fig. 1, fig. 1 is a schematic diagram of an embodiment of a power supply feedback circuit according to the present application. In the embodiment of the present application, as shown in fig. 1, the power feedback circuit includes a power control module 100 and a power feedback module 200; the power supply control module 100 is connected with the power supply feedback module 200, and the power supply feedback module 200 is connected with the load end 300; the power feedback module 200 is configured to provide a distal feedback or a proximal feedback to the power control module 100 according to the impedance of the load terminal 300.
Specifically, the power control module 100 is configured to control voltage output to the load terminal 300, where the load terminal 300 refers to an electronic component that consumes power, such as a main control chip of an automobile cabin. The main control chip has higher requirements on the safety and stability of the power supply, and generally has the characteristics of low voltage, high current, obvious load dynamic characteristics and the like. For this, the power control module 100 needs to obtain feedback about the load terminal 300 to adjust the power supply to the load terminal 300.
In this embodiment, the power control module 100 is connected to the power feedback module 200, and the power feedback module 200 is connected to the load terminal 300. In the process of supplying power to the load terminal 300, the power supply feedback module 200 obtains voltage information about the load terminal 300 based on the connection relationship and feeds back the voltage information to the power supply control module 100. Accordingly, the power control module 100 receives the feedback provided by the power feedback module 200, and adjusts the voltage output to the load terminal 300 according to the feedback. More specifically, the power feedback module 200 provides two feedback modes, distal feedback and proximal feedback, respectively. It can be appreciated that the remote feedback mode can provide voltage information closer to the real load of the load end 300, which is beneficial to realizing accurate control of the output voltage by the power control module 100; while the voltage information provided by the near-end feedback mode is less accurate than the far-end feedback mode, the lower accuracy control of the output voltage by the power control module 100 can be achieved as well. Therefore, in this embodiment, the near-end feedback mode is adopted as an alternative solution, and in the case of failure of the far-end feedback mode, the control of the power control module 100 on the output voltage is implemented based on the near-end feedback mode, so as to avoid the occurrence of voltage imbalance.
In order to realize the switching between the far-end feedback mode and the near-end feedback mode, the power feedback module 200 of the present embodiment may use the impedance of the load end 300 as the basis for switching between the far-end feedback mode and the near-end feedback mode. The feedback loop of the load end 300 presents a low impedance characteristic under normal conditions, and the power feedback module 200 adopts a far-end feedback mode; the feedback loop of the load end 300 presents a high impedance characteristic in an abnormal situation, and the power feedback module 200 adopts a near-end feedback mode.
In this embodiment, the power feedback module 200 supports two feedback modes, namely, a far-end feedback mode and a near-end feedback mode, and switches between the far-end feedback mode and the near-end feedback mode according to the impedance of the load end 300. In this way, even if the power supply remote feedback connection fails, the power supply feedback module 200 can provide the power supply control module 100 with the near-end feedback, so that the power supply output imbalance is avoided, and the safety of the power supply output is effectively improved.
Referring to fig. 2, fig. 2 is a schematic diagram of another embodiment of the power supply feedback circuit of the present application. In an embodiment of the present application, as shown in fig. 2, the power feedback module 200 includes a proximal feedback unit 201 and a distal feedback unit 202; the near-end feedback unit 201 is connected with the power supply control module 100, and the far-end feedback unit 202 is connected with the power supply control module 100; a proximal feedback unit 201, configured to provide proximal feedback to the power control module 100 when the load end 300 satisfies a high impedance condition; the remote feedback unit 202 is configured to provide remote feedback to the power control module 100 when the load terminal 300 satisfies the low impedance condition.
Specifically, the power supply feedback module 200 includes a proximal feedback unit 201 and a proximal feedback unit 201, and in one case, the proximal feedback unit 201 and the proximal feedback unit 201 may overlap partially, for example, share a number of voltage dividing resistors.
It is understood that a feedback circuit based on a voltage dividing resistor may be disposed in the proximal feedback unit 201 and the distal feedback unit 202, so that the power feedback module 200 may provide the distal feedback or the proximal feedback to the power control module 100 according to the impedance of the load terminal 300. That is, there is an intermediate value in the impedance of the load end 300, when the impedance of the load end 300 is higher than the intermediate value, the power feedback module 200 is switched to the near-end feedback mode, i.e. the near-end feedback is implemented by the near-end feedback unit 201, and when the impedance of the load end 300 is lower than the intermediate value, the power feedback module 200 is switched to the far-end feedback mode, i.e. the far-end feedback is implemented by the far-end feedback unit 202.
Therefore, the voltage dividing resistors with different resistance values can be selected according to the actual requirement, so as to adjust the intermediate value of the impedance of the load end 300, and the intermediate value is used as the judgment basis of the preset high impedance condition and low impedance condition. If the impedance of the load end 300 is higher than the intermediate value, the preset high impedance condition is satisfied; if the impedance of the load terminal 300 is lower than the intermediate value, the predetermined low impedance condition is satisfied. In this manner, the power feedback module 200 may flexibly switch between a distal feedback mode and a proximal feedback mode.
In this embodiment, the proximal feedback unit 201 is disposed inside the power feedback module 200, and the proximal feedback unit 201 includes the distal feedback unit 202, that is, the proximal feedback unit 201 and the distal feedback unit 202 may share a part of components. The distal feedback is implemented by the distal feedback unit 202 when the impedance of the load terminal 300 is low, and the proximal feedback is implemented by the proximal feedback unit 201 when the impedance of the load terminal 300 is high. Therefore, a double feedback mechanism of the power supply is realized, and the safety of power supply control is obviously improved.
Referring to fig. 3, fig. 3 is a schematic diagram of a power supply feedback circuit according to another embodiment of the application. In the embodiment of the present application, as shown in fig. 3, a first end of the proximal feedback unit 201 is connected to a voltage output end of the power control module 100; a second end of the proximal feedback unit 201 is connected to a power supply end of the load end 300; the third end of the near-end feedback unit 201 is connected with the output voltage feedback end of the power supply control module 100; the fourth terminal of the proximal feedback unit 201 is connected to the ground terminal of the load terminal 300; the fifth terminal of the proximal feedback unit 201 is connected to ground.
In addition, the first end of the proximal feedback unit 201 is connected to the power end of the load end 300; a second end of the near-end feedback unit 201 is connected with an output voltage feedback end of the power control module 100; the third terminal of the proximal feedback unit 201 is connected to the ground terminal of the load terminal 300.
Specifically, the power control module 100 includes a proximal feedback unit 201, and the proximal feedback unit 201 further includes a distal feedback unit 202. That is, there is a partial overlap of the proximal feedback unit 201 and the distal feedback unit 202.
The current at the voltage output terminal of the power control module 100 is input to the first terminal of the remote feedback unit 202, the current at the power terminal of the load terminal 300 is input to the second terminal of the remote feedback unit 202, and the current at the remote feedback unit 202 is output to the ground terminal of the load terminal 300 and the ground terminal (may be the same ground terminal). In addition, the voltage information fed back by the remote feedback unit 202 is input to the output voltage feedback end of the power control module 100.
The current at the power supply terminal of the load terminal 300 is input to the second terminal of the remote feedback unit 202, and the current at the remote feedback unit 202 is output to the ground terminal of the load terminal 300. In addition, the voltage information fed back by the remote feedback unit 202 is input to the output voltage feedback end of the power control module 100.
In the connection relationship between the power supply terminal of the load terminal 300, the output voltage feedback terminal of the power control module 100, and the ground terminal of the load terminal 300, the near-end feedback unit 201 and the far-end feedback unit 202 may share a common wire.
The present embodiment specifically describes the connection manner of the proximal feedback unit 201 and the distal feedback unit 202, where the distal feedback unit 202 is used to implement the distal feedback when the impedance of the load end 300 is low, and the proximal feedback unit 201 is used to implement the proximal feedback when the impedance of the load end 300 is high. Therefore, a double feedback mechanism of the power supply is realized, and the safety of power supply control is obviously improved.
Referring to fig. 4, fig. 4 is a schematic diagram of a power feedback circuit according to another embodiment of the application. In the embodiment of the present application, as shown in fig. 4, the proximal feedback unit 201 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; the distal feedback unit 202 includes a second resistor R2 and a third resistor R3; a first end of the first resistor R1 is connected to the voltage output end of the power control module 100, and a second end of the first resistor R1 is connected to the power end of the load end 300; the first end of the second resistor R2 is connected with the second end of the first resistor R1, and the second end of the second resistor R2 is connected with the output voltage feedback end of the power control module 100; the first end of the third resistor R3 is connected with the second end of the second resistor R2, and the second end of the third resistor R3 is connected with the grounding end of the load end 300; the first end of the fourth resistor R4 is connected with the second end of the third resistor R3, and the second end of the fourth resistor R4 is connected with the ground end.
Specifically, the power supply feedback circuit needs to select a suitable power supply controller according to the requirements of the load end 300 and the power supply input voltage (Vi n), the load end 300 is generally a main control chip of an automobile cabin, or other SOCs and GPUs, and generally features of low voltage, high current, obvious load dynamic characteristics and the like, and the power supply feedback circuit controls the voltage output through the power supply control module 100.
Further, the power control module 100 is a DC/DC power controller U1, and the DC/DC power controller U1 is configured to adjust the voltage output to the load terminal 300 according to the feedback of the power feedback module 200. Specifically, the DC/DC power supply controller U1 is a buck power supply controller that can control buck and boost. The DC/DC power controller U1 supports the setting of the power Mode and the switching frequency, as shown in fig. 4, the Mode pin and the RT pin of the DC/DC power controller U1 are used to set the power Mode and the switching frequency, respectively.
In addition, the power supply feedback circuit of the present embodiment further includes an inductor L1, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The first end of the inductor L1 is connected with the DC/DC power supply controller U1, the inductor L1 is used for preventing alternating current from passing through and allowing direct current to pass through, and the inductor L1 also has the functions of filtering and forming a resonant circuit; the first end of the first capacitor C1 is connected with the voltage input end of the DC/DC power supply controller U1, the second end of the first capacitor C1 is grounded, the first end of the second capacitor C2 is connected with the voltage input end of the DC/DC power supply controller U1, the second end of the second capacitor C2 is grounded, and the first capacitor C1 is connected with the second capacitor C2 in parallel and used for filtering and eliminating interference; the first end of the third capacitor C3 is connected with the voltage output end of the DC/DC power supply controller U1, the second end of the third capacitor C3 is grounded, the first end of the fourth capacitor C4 is connected with the voltage output end of the DC/DC power supply controller U1, the second end of the fourth capacitor C4 is grounded, and the third capacitor C3 is connected with the fourth capacitor C4 in parallel and used for filtering and eliminating interference.
The power feedback module 200 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 form a near-end feedback unit 201, and the second resistor R2 and the third resistor R3 form a far-end feedback unit 202. The first end of the first resistor R1 is connected with the voltage output end of the power control module 100 and Vout, and the second end of the first resistor R1 is connected with the power end of the load end 300; the first end of the second resistor R2 is connected with the second end of the first resistor R1, and the second end of the second resistor R2 is connected with the output voltage feedback end of the power control module 100; the first end of the third resistor R3 is connected with the second end of the second resistor R2, and the second end of the third resistor R3 is connected with the grounding end of the load end 300; the first end of the fourth resistor R4 is connected with the second end of the third resistor R3, and the second end of the fourth resistor R4 is connected with the ground end.
Further, the sum of the resistance values of the first resistor R1 and the fourth resistor R4 is smaller than the sum of the resistance values of the second resistor R2 and the third resistor R3. The second resistor R2 and the third resistor R3 of the present embodiment are typically of the order of several tens of K ohms, for example 50K ohms. While the first resistor R1 and the fourth resistor R4 are of a lower order than the second resistor R2 and the third resistor R3, typically of a few tens of ohms, for example 50 ohms. Thus, the sum of the resistance values of the first resistor R1 and the fourth resistor R4 is far smaller than the sum of the resistance values of the second resistor R2 and the third resistor R3.
In the power feedback process, the power of the power source terminal of the load terminal 300 is input to the FB pin (i.e., the output voltage feedback terminal) of the DC/DC power controller U1 after being divided by the second resistor R2 and the third resistor R3, and then returns to the ground terminal of the load terminal 300. At this time, the DC/DC power controller U1 receives the remote feedback, and the DC/DC power controller U1 further adjusts the output voltage of the voltage output terminal Vout according to the remote feedback, where the voltage is a Vl load at the power terminal of the load terminal 300, and the value of the Vl load is not completely equal to the value of Vout due to the effects of the PCB routing and PCB parasitic parameters, and generally the value of the Vl load is slightly smaller than the value of Vout.
When the distal feedback is normal, the power terminal of the load terminal 300 and the ground terminal of the load terminal 300 will present a low impedance state. Since the value of the power supply terminal Vl load of the load terminal 300 is slightly smaller than the value of the voltage output terminal Vout, the impedance of the ground terminal of the load terminal 300 is much smaller than the fourth resistor R4, and the DC/DC power controller U1 uses the value of the remote feedback to perform loop control, such as the remote feedback path in fig. 4. Thus, the power supply loop can be adjusted according to the real load condition, so that the output voltage of the voltage output terminal Vout can be adjusted more accurately, and the load terminal 300 can also adjust the power supply terminal Vl load according to the real load.
However, since the feedback output of the load end 300 is generally output through the internal of the main control chip such as the SOC or the GPU, the main control chip such as the SOC or the GPU has a certain probability to cause a failure of feedback without output from the viewpoint of functional safety, at this time, the power supply end of the load end 300 and the ground end of the load end 300 will be in a high impedance state, and if no other feedback path is present at this time, the DC/DC power supply controller U1 may output a higher voltage to damage the load end 300. As in the proximal feedback path of fig. 4, the present embodiment will implement proximal feedback using a loop formed by the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4.
Specifically, since the magnitude of the resistance values of the first resistor R1 and the fourth resistor R4 is much smaller (for example, the magnitude differs by 1K ohms or more) than the magnitude of the resistance values of the second resistor R2 and the third resistor R3, it is possible to ensure that the resistance voltage division ratio of the near-end feedback path (first resistor r1+second resistor r2)/(third resistor r3+fourth resistor R4) is very close to the resistance voltage division ratio of the far-end feedback path (second resistor R2/third resistor R3). Thus, the output voltage when the far-end feedback is used is basically consistent with the output voltage when the near-end feedback is used, and the working can be still performed under the condition that the load end 300 is not damaged. When the feedback output of the load terminal 300 is recovered to be normal, that is, the power supply terminal of the load terminal 300 and the ground terminal of the load terminal 300 are in a low impedance state, the remote feedback with higher precision is switched.
Further, the power supply feedback module 200 further includes a feedforward capacitor C5; the first end of the second resistor R2 is connected to the first end of the feedforward capacitor C5, and the second end of the second resistor R2 is connected to the second end of the feedforward capacitor C5. The feedforward capacitor C5 may allow the DC/DC power supply controller U1 to respond more effectively to high frequency disturbances (small ac impedance) on the output voltage.
In this embodiment, the power feedback module 200 supports two feedback modes, namely, a far-end feedback mode and a near-end feedback mode, and switches between the far-end feedback mode and the near-end feedback mode according to the impedance of the load end 300. In this way, even if the power supply remote feedback connection fails, the power supply feedback module 200 can provide the power supply control module 100 with the near-end feedback, so that the power supply output imbalance is avoided, and the safety of the power supply output is effectively improved.
The application also provides a power supply system, which comprises a power supply feedback circuit, wherein the specific structure of the power supply feedback circuit refers to the embodiment, and as the power supply adopts all the technical schemes of all the embodiments, the power supply system also has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
The application also provides a vehicle, which comprises a power supply system, wherein the specific structure of the power supply system refers to the embodiment, and because the vehicle adopts all the technical schemes of all the embodiments, the vehicle also has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
It should be noted that the technical solutions of the embodiments of the present application may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the embodiments, and when the technical solutions are contradictory or cannot be implemented, those skilled in the art should consider that the technical solutions are not combined, and are not within the scope of protection claimed by the present application.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the application, and all equivalent structural changes made by the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present application.
Claims (9)
1. A power supply feedback circuit, which is characterized by comprising a power supply control module and a power supply feedback module;
The power supply control module is connected with the power supply feedback module, and the power supply feedback module is connected with the load end;
the power supply feedback module is used for providing far-end feedback or near-end feedback for the power supply control module according to the impedance of the load end;
The power supply feedback module comprises a near-end feedback unit and a far-end feedback unit; the near-end feedback unit is connected with the power supply control module, and the far-end feedback unit is connected with the power supply control module; a feedback circuit based on a voltage dividing resistor is arranged in the near-end feedback unit and the far-end feedback unit;
The near-end feedback unit is used for providing near-end feedback for the power supply control module when the load end meets the preset high-impedance condition;
The remote feedback unit is used for providing remote feedback for the power supply control module when the load end meets the preset low-impedance condition.
2. The power supply feedback circuit of claim 1, wherein a first end of the proximal feedback unit is connected to a voltage output of the power supply control module;
The second end of the near-end feedback unit is connected with the power supply end of the load end;
the third end of the near-end feedback unit is connected with the output voltage feedback end of the power supply control module;
the fourth end of the near-end feedback unit is connected with the grounding end of the load end;
the fifth end of the near-end feedback unit is connected with the grounding end.
3. The power supply feedback circuit of claim 1 wherein the first end of the remote feedback unit is connected to a power supply end of the load end;
The second end of the remote feedback unit is connected with the output voltage feedback end of the power supply control module;
The third end of the remote feedback unit is connected with the grounding end of the load end.
4. The power supply feedback circuit of claim 1, wherein the proximal feedback unit comprises a first resistor, a second resistor, a third resistor, a fourth resistor; the distal feedback unit includes the second resistor and the third resistor;
The first end of the first resistor is connected with the voltage output end of the power supply control module, and the second end of the first resistor is connected with the power supply end of the load end; the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is connected with the output voltage feedback end of the power supply control module; the first end of the third resistor is connected with the second end of the second resistor, and the second end of the third resistor is connected with the grounding end of the load end; the first end of the fourth resistor is connected with the second end of the third resistor, and the second end of the fourth resistor is connected with the grounding end.
5. The power supply feedback circuit of claim 4 wherein a sum of resistance values of the first resistor and the fourth resistor is less than a sum of resistance values of the second resistor and the third resistor.
6. The power supply feedback circuit of claim 4, wherein the power supply feedback module further comprises a feedforward capacitor; the first end of the second resistor is connected with the first end of the feedforward capacitor, and the second end of the second resistor is connected with the second end of the feedforward capacitor.
7. The power supply feedback circuit of claim 1 wherein the power supply control module is a DC/DC power supply controller.
8. A power supply system comprising the power supply feedback circuit of any one of claims 1-7.
9. A vehicle comprising the power supply system of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321221562.XU CN220857890U (en) | 2023-05-18 | 2023-05-18 | Power supply feedback circuit, power supply system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321221562.XU CN220857890U (en) | 2023-05-18 | 2023-05-18 | Power supply feedback circuit, power supply system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220857890U true CN220857890U (en) | 2024-04-26 |
Family
ID=90789170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321221562.XU Active CN220857890U (en) | 2023-05-18 | 2023-05-18 | Power supply feedback circuit, power supply system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220857890U (en) |
-
2023
- 2023-05-18 CN CN202321221562.XU patent/CN220857890U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8368248B2 (en) | Active low-pass current filter | |
| US7960958B2 (en) | Voltage regulator feedback protection method and apparatus | |
| CN109039045A (en) | LDO parallel current-equalizing circuit | |
| CN101236441B (en) | Circuit for improving power supply load regulation rate | |
| CN218450626U (en) | Voltage drop compensation circuit, voltage drop compensation device and electronic equipment | |
| EP1224720B1 (en) | A simplified current share circuit | |
| CN111880082A (en) | Power supply cabin chip testing method | |
| CN220857890U (en) | Power supply feedback circuit, power supply system and vehicle | |
| CN104777864A (en) | Power supply and output load regulation compensation circuit and voltage regulation method thereof | |
| CN112865726B (en) | Power amplifying circuit and electronic device | |
| CN213602560U (en) | Circuit for compensating according to load | |
| CN108574274B (en) | Power supply protection circuit applied to vehicle-mounted tracker | |
| CN214205327U (en) | Voltage stabilization filtering module | |
| CN210958154U (en) | Camera digital power supply variable voltage power supply circuit | |
| CN113595381B (en) | Expandable airborne power supply device containing TVS anti-interference circuit | |
| CN216069619U (en) | Power supply system based on hybrid power controller | |
| CN214506880U (en) | Output voltage adjustable current expansion circuit, control system and electric appliance | |
| CN116505765B (en) | Constant current circuit of BUCK power supply | |
| CN215219540U (en) | Circuit for setting output voltage by adjusting reference voltage | |
| CN212627688U (en) | Master-slave series high-voltage high-power high-precision direct-current power supply | |
| CN211454402U (en) | Electronic accelerator pedal circuit capable of working at wide voltage | |
| CN220528264U (en) | Car lamp interface circuit for diagnosing car lamp faults | |
| CN221042321U (en) | High surge protection circuit of weight transmitter | |
| CN111224542A (en) | Power module applied to miniaturized SERF magnetometer laser current source | |
| CN219801874U (en) | Output independent protection circuit and power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |