ADC signal circuit for detecting conversion from high voltage to low voltage
By introducing a voltage divider and a voltage regulator unit into the high-voltage detection circuit of the microcontroller, and utilizing operational amplifier U1 and diodes D1 and D2, the problem of voltage instability was solved, and high-precision microcontroller detection was achieved.
Patent Information
- Application Number
- CN202423260341.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing technologies, the use of multiple resistors to divide the voltage in a microcontroller-based high-voltage detection circuit leads to voltage instability and detection errors.
It employs a voltage divider and a voltage regulator unit, including resistors and capacitors, and amplifies the voltage signal through an operational amplifier U1. Combined with diodes to prevent damage from excessive current, it achieves stable and precise voltage regulation.
This improved voltage stability and microcontroller detection accuracy, and reduced errors.
Smart Images
Figure CN223742605U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to circuit design technical field especially, and it relates to a kind of detection high voltage conversion low voltage's ADC signal circuit. BACKGROUND
[0002] In the related art, the circuit for detecting high voltage of single-chip microcomputer usually adopts multiple resistors to divide voltage and then detect, so as to reduce voltage. However, multiple resistors are affected by temperature during long-time operation, resulting in unstable voltage and errors in detection of single-chip microcomputer. SUMMARY
[0003] The utility model aims at overcoming the deficiencies in the prior art, providing a kind of detection high voltage conversion low voltage's ADC signal circuit, can improve the stability of voltage, to improve the precision of single-chip microcomputer detection.
[0004] The utility model aims at overcoming the deficiencies in the prior art, providing a kind of detection high voltage conversion low voltage's ADC signal circuit, can improve the stability of voltage, to improve the precision of single-chip microcomputer detection.
[0005] The first aspect of the present application provides a kind of detection high voltage conversion low voltage's ADC signal circuit, comprising: voltage dividing unit, including resistance R4, resistance R5, resistance R6, resistance R7, resistance R3 and capacitor C1, the first end of the resistance R4 is electrically connected with the resistance R5, the second end of the resistance R5 is electrically connected with the first end of the resistance R6, the second end of the resistance R6 is electrically connected with the first end of the resistance R7, the second end of the resistance R7 is electrically connected with the first end of the resistance R3, the second end of the resistance R3 is electrically connected with the first end of the capacitor C1;And voltage stabilizing unit, including operational amplifier U1, the second end of the capacitor C1 is electrically connected with the operational amplifier U1.
[0006] The voltage stabilizing unit further includes resistance R9, and the first end of the resistance R9 is electrically connected with the operational amplifier U1.
[0007] The voltage stabilizing unit further includes capacitor C2, and the first end of the capacitor C2 is electrically connected with the second end of the resistance R9.
[0008] The voltage stabilizing unit further includes diode D1 and diode D2, and the diode D1 and the diode D2 are electrically connected with the second end of the resistance R9 respectively.
[0009] Further comprising adjusting unit, adjusting unit includes resistance R15, and the first end of the resistance R15 is electrically connected with the operational amplifier U1.
[0010] The adjusting unit further includes resistance R13, and the first end of the resistance R13 is electrically connected with the second end of the resistance R15.
[0011] The adjusting unit further comprises a resistor R12, a first end of the resistor R12 is electrically connected with a second end of the resistor R13.
[0012] The adjusting unit further comprises a resistor R11, a first end of the resistor R11 is electrically connected with a second end of the resistor R12.
[0013] The adjusting unit further comprises a resistor R10, a first end of the resistor R10 is electrically connected with a second end of the resistor R11.
[0014] The adjusting unit further comprises a capacitor C3, a first end of the capacitor C3 is electrically connected with a first end of the resistor R15, and a second end of the capacitor C3 is electrically connected with the operational amplifier U1.
[0015] Compared with the prior art, the adjusting unit has at least the following advantages:
[0016] By electrically connecting the operational amplifier U1 with the voltage dividing unit, the operational amplifier U1 can amplify the voltage signal to the required level and ensure that the voltage is stable within the required range. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows.
[0018] Figure 1 The functional module diagram of the ADC signal circuit for detecting high voltage into low voltage in the embodiment of the present application;
[0019] Figure 2 The circuit diagram of the ADC signal circuit for detecting high voltage into low voltage in the embodiment of the present application. DETAILED DESCRIPTION
[0020] The embodiments of the present application will be described in detail with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0021] It should be understood that, although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.
[0022] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixed connection, or detachable connection or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0023] The circuit for detecting high voltage of single-chip microcomputer usually adopts multiple resistors for voltage division and then detection to reduce the voltage. However, the multiple resistors will be affected by temperature under long-time operation, resulting in unstable voltage and thus errors in detection of single-chip microcomputer.
[0024] To solve the above problems, the embodiment of the application provides an ADC signal circuit for detecting high voltage to low voltage, which can improve the stability of voltage and thus the precision of detection of single-chip microcomputer.
[0025] The technical scheme of the embodiment of the application is described in detail below with reference to the drawings.
[0026] Please refer to Figure 1 and Figure 2 An ADC signal circuit for detecting high voltage to low voltage, comprising: a voltage division unit 100 and a voltage stabilizing unit 200, the voltage division unit 100 comprising resistors R4, R5, R6, R7, R3 and a capacitor C1, the first end of the resistor R4 being electrically connected with the resistor R5, the second end of the resistor R5 being electrically connected with the first end of the resistor R6, the second end of the resistor R6 being electrically connected with the first end of the resistor R7, the second end of the resistor R7 being electrically connected with the first end of the resistor R3, the second end of the resistor R3 being electrically connected with the first end of the capacitor C1; the voltage stabilizing unit 200 comprising an operational amplifier U1, the operational amplifier U1 being electrically connected with the second end of the capacitor C1.
[0027] It should be noted that the resistors R4, R5, R6, R7 and R3 are voltage dividing resistors, and the capacitor C1 is a filter capacitor. Further, by electrically connecting the operational amplifier U1 to the voltage dividing unit 100, the operational amplifier U1 can amplify the voltage signal to the required level and ensure that the voltage is stable within the required range. On the other hand, precise adjustment and stable control of the output voltage can be achieved, thereby improving the accuracy of the single-chip microcomputer detection. Further, the HVDC port is used to electrically connect the high voltage 400V, and the HVDC_NET2 is used to connect the single-chip microcomputer.
[0028] Referring to Figure 2 In an embodiment, the voltage stabilizing unit 200 further includes a resistor R9, and a first end of the resistor R9 is electrically connected to the operational amplifier U1.
[0029] It should be noted that the resistor R9 is a current limiting resistor matched with the operational amplifier U1.
[0030] Referring to Figure 2 In an embodiment, the voltage stabilizing unit 200 further includes a capacitor C2, and a first end of the capacitor C2 is electrically connected to a second end of the resistor R9.
[0031] It should be noted that the capacitor C2 is a filter capacitor.
[0032] Referring to Figure 2 In an embodiment, the voltage stabilizing unit 200 further includes a diode D1 and a diode D2, and the diode D1 and the diode D2 are respectively electrically connected to the second end of the resistor R9.
[0033] It should be noted that the diode D1 and the diode D2 are clamping diodes used to prevent excessive current from damaging the operational amplifier U1.
[0034] Referring to Figure 2 In an embodiment, the ADC signal circuit for detecting high voltage to low voltage further includes an adjusting unit, and the adjusting unit includes a resistor R15, and a first end of the resistor R15 is electrically connected to the operational amplifier U1. Specifically, the adjusting unit further includes a resistor R13, and a first end of the resistor R13 is electrically connected to a second end of the resistor R15. Specifically, the adjusting unit further includes a resistor R12, and a first end of the resistor R12 is electrically connected to a second end of the resistor R13. Specifically, the adjusting unit further includes a resistor R11, and a first end of the resistor R11 is electrically connected to a second end of the resistor R12. Specifically, the adjusting unit further includes a resistor R10, and a first end of the resistor R10 is electrically connected to a second end of the resistor R11. Specifically, the adjusting unit further includes a capacitor C3, and a first end of the capacitor C3 is electrically connected to the first end of the resistor R15, and a second end of the capacitor C3 is electrically connected to the operational amplifier U1.
[0035] It should be noted that the resistors R15, R13, R12, R11 and R10 are adjustable voltage dividing resistors, which can reduce power loss and improve the stability of the circuit. At the same time, the series connection of multiple voltage dividing resistors can provide better filtering effect, reduce the influence of the external circuit, and improve the anti-interference ability of the circuit.
[0036] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above examples, the description of each example is focused on, and the parts not described in detail in a certain example can be referred to the relevant description of other examples. It should also be known by those skilled in the art that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method of the embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device of the embodiments of the present application can be combined, divided and reduced according to actual needs.
[0037] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical application or improvement of technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.
Claims
1. A high-to-low voltage conversion ADC signal circuit, characterized by, The voltage stabilizing unit further comprises a resistor R9, a first end of the resistor R9 being electrically connected with the operational amplifier U1. The voltage stabilizing unit further comprises a capacitor C2, a first end of the capacitor C2 being electrically connected with a second end of the resistor R9. The voltage stabilizing unit further comprises a diode D1 and a diode D2, the diode D1 and the diode D2 being respectively electrically connected with the second end of the resistor R9.
2. The high-to-low voltage converting ADC signal circuit according to claim 1, wherein, The voltage stabilizing unit further comprises a resistor R10, a first end of the resistor R10 being electrically connected with a second end of the resistor R11.
3. The high-to-low voltage converting ADC signal circuit according to claim 2, wherein, The voltage stabilizing unit further comprises a capacitor C3, a first end of the capacitor C3 being electrically connected with the first end of the resistor R15, and a second end of the capacitor C3 being electrically connected with the operational amplifier U1.
4. The ADC signal circuit for detecting high-to-low voltage according to claim 2, wherein, The voltage stabilizing unit further comprises a resistor R9, a first end of the resistor R9 being electrically connected with the operational amplifier U1.
5. The high-to-low voltage converting ADC signal circuit according to claim 1, wherein, The voltage stabilizing unit further comprises a capacitor C2, a first end of the capacitor C2 being electrically connected with a second end of the resistor R9.
6. The high-to-low voltage converting ADC signal circuit according to claim 5, wherein, The voltage stabilizing unit further comprises a diode D1 and a diode D2, the diode D1 and the diode D2 being respectively electrically connected with the second end of the resistor R9.
7. The high-to-low voltage converting ADC signal circuit according to claim 6, wherein, The voltage stabilizing unit further comprises a resistor R10, a first end of the resistor R10 being electrically connected with a second end of the resistor R11.
8. The high-to-low voltage converting ADC signal circuit according to claim 7, wherein, The voltage stabilizing unit further comprises a capacitor C3, a first end of the capacitor C3 being electrically connected with the first end of the resistor R15, and a second end of the capacitor C3 being electrically connected with the operational amplifier U1.
9. The high-to-low voltage converting ADC signal circuit according to claim 8, wherein, 10. The high-to-low voltage converting ADC signal circuit of claim 8, wherein,