Main control chip abnormity adjusting circuit

Abstract

The utility model relates to a main control chip abnormity adjusting circuit which comprises a power supply module, a feedback resistance circuit and a thermistor circuit, the power supply module is used for converting an input voltage into an output voltage, the feedback resistance circuit is connected to a pin 5 of the power supply module, and the output voltage is adjusted through a voltage division relation. The thermistor circuit is connected with the feedback resistor network in parallel or in series and used for dynamically adjusting the voltage division ratio according to the environment temperature, output voltage deviation is automatically compensated through the characteristic that the resistance value of a thermistor changes along with the temperature, and the power supply stability of the main control chip at different temperatures is ensured. Specifically, due to different requirements of high temperature and low temperature on voltage, an R41 resistor of a thermistor is adopted to be matched with voltage regulation, the resistance value of the thermistor at high temperature is reduced, the core voltage is relatively reduced, and the resistance value of the thermistor at low temperature is increased, so that the output of the core voltage is increased, and the core voltage has enough driving capability to enable a main control chip to work normally.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to a main control chip abnormal adjustment circuit. Background Technology

[0002] In high and low temperature environments, such as Figure 2 As shown, the operating voltage of an FPGA (Field-Programmable Gate Array) may fluctuate due to temperature changes, leading to malfunctions. This voltage fluctuation can be caused by the power supply module, PCB layout, thermal design, or the temperature characteristics of the FPGA itself. In practical applications, as the ambient temperature rises or falls, some power supply modules may cause their output voltage to deviate from the theoretical design voltage at room temperature due to unsuitable ambient temperatures. When this deviation causes the voltage value to exceed the voltage range required by the FPGA chip, abnormal situations will occur. Utility Model Content

[0003] To address the issue of power modules exhibiting significant temperature variations, this invention provides a main control chip abnormality adjustment circuit, comprising:

[0004] A power module is used to convert input voltage into output voltage;

[0005] A feedback resistor circuit is connected to pin 5 of the power module to adjust the output voltage through a voltage divider relationship;

[0006] A thermistor circuit, connected in parallel or series with the feedback resistor circuit, is used to dynamically adjust the voltage division ratio according to the ambient temperature.

[0007] In one possible implementation, the feedback resistor circuit includes resistors R31 and R32;

[0008] The R31 resistor is suitable for electrical connection to the power supply, and the R31 resistor is connected in series with the R32 resistor. The pin 5 of the power module is electrically connected to the voltage divider node of the R31 resistor and the R32 resistor.

[0009] The R32 resistor is grounded.

[0010] In one possible implementation, the thermistor circuit includes resistors R40 and R41;

[0011] The R41 resistor is a thermistor;

[0012] The R40 resistor is suitable for electrical connection to a power source, and the R40 resistor is connected in series with the R41 resistor. The R40 resistor and the R41 resistor are connected in parallel with the R31 resistor.

[0013] In one possible implementation, the output voltage satisfies the following relationship:

[0014]

[0015] ;in,

[0016] The R is equivalent to the parallel resistance value of R31 resistor, R40 resistor, and R41 resistor connected in series.

[0017] The voltage v is the reference voltage of the power module, and the reference voltage is 0.6V.

[0018] In one possible implementation, the resistance of resistor R31 is 19.1K.

[0019] The resistance of the R32 resistor is 20.5KΩ;

[0020] The resistance of the R40 resistor is 33K;

[0021] The resistance of resistor R41 is 10K.

[0022] In one possible implementation, the input pin 4 of the power module is connected to an input filter capacitor.

[0023] In one possible implementation, pin 3 of the power module is connected to an inductor and an output filter capacitor.

[0024] In one possible implementation, pin 1 of the power module is adapted for electrical connection to the control module.

[0025] In one possible implementation, pin 2 of the power module is grounded.

[0026] In one possible implementation, the power module is designated as RY3430.

[0027] The beneficial effects of the main control chip abnormal adjustment circuit in this application embodiment are as follows: By utilizing the temperature-dependent resistance characteristics of the thermistor, it automatically compensates for output voltage deviations, ensuring the power supply stability of the main control chip at different temperatures. Specifically, due to the different voltage requirements at high and low temperatures, resistor R41 (a thermistor) is used to adjust the voltage. At high temperatures, the thermistor's resistance decreases, resulting in a relatively lower core voltage. At low temperatures, the thermistor's resistance increases, thereby increasing the core voltage output and providing sufficient driving capability for the main control chip to operate normally.

[0028] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0030] Figure 1 A schematic diagram of the main control chip abnormal adjustment circuit according to an embodiment of this application is shown;

[0031] Figure 2 This diagram illustrates the normal resistance change of the main control chip abnormal adjustment circuit according to an embodiment of this application. Detailed Implementation

[0032] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0033] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0036] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0037] like Figure 1As shown, the main control chip abnormal adjustment circuit of this application embodiment includes: a power supply module 100, a feedback resistor circuit and a thermistor circuit. The power supply module 100 is used to convert the input voltage into the output voltage. The feedback resistor circuit is connected to pin 5 of the power supply module 100 and adjusts the output voltage through the voltage division relationship. The thermistor circuit is connected in parallel or in series with the feedback resistor circuit and is used to dynamically adjust the voltage division ratio according to the ambient temperature.

[0038] In this embodiment, the output voltage deviation is automatically compensated by utilizing the resistance change characteristics of the thermistor with temperature, ensuring the power supply stability of the main control chip at different temperatures. Specifically, due to the different voltage requirements at high and low temperatures, a 500Ω resistor (R41) is used to adjust the voltage. At high temperatures, the thermistor's resistance decreases, resulting in a relatively lower core voltage. At low temperatures, the thermistor's resistance increases to increase the core voltage output, providing sufficient driving capability for the main control chip to operate normally.

[0039] In this configuration, resistors R41 (500 ohms) and R40 (400 ohms) are connected in series, and then in parallel with R31, resulting in a reduced parallel resistance. This prevents the voltage from exceeding the range at low temperatures. Alternatively, resistors R40 (400 ohms) are connected in series with resistor R41 (500 ohms), and then in parallel with resistor R31 (200 ohms). This replaces... Figure 1 The resistor R31 in the calculation is 200Ω, with a resistance of 14.225KΩ. After being included in the calculation (R31 / R32+1),... 0.6 = Vout, the output voltage is 1.01V, operating within the chip's operating voltage range. At a low temperature of -30 degrees Celsius, the 10K resistor has a resistance of 100K. After calculation, the resistance at R31 is replaced with 17.7K, which is included in the calculation (R31 / R32+1). 0.6 = Vout, the output voltage is 1.11V, which is also within the operating voltage range of the chip.

[0040] In one specific embodiment, the feedback resistor circuit includes resistor R31 200 and resistor R32 300. Resistor R31 200 is suitable for electrical connection to the power supply, and resistor R31 200 and resistor R32 300 are connected in series. Pin 5 of the power module 100 is electrically connected to the voltage divider node of resistor R31 200 and resistor R32 300. The reference voltage is determined by the fixed ratio of R31 / R32, providing a stable reference point for temperature compensation.

[0041] Among them, resistor R32 is grounded at 300Ω.

[0042] In one specific embodiment, the thermistor circuit includes resistors R40 (400) and R41 (500), where R41 is a thermistor. Resistor R40 is suitable for electrical connection to a power supply, and R40 and R41 are connected in series. R40 and R41 are connected in parallel with resistor R31 (200). The thermistor circuit, composed of a fixed-value R40 (400) and a thermistor R41 (500) connected in series and in parallel with R31, and with the feedback resistor R31 (200) in parallel, changes its equivalent resistance value through temperature variations, directly affecting the voltage division ratio and achieving linear compensation.

[0043] In one specific embodiment, the output voltage satisfies the following relationship:

[0044]

[0045] Where R is equivalent to the parallel resistance of R31 resistor 200, R40 resistor 400 and R41 resistor 500 connected in series, and v is the reference voltage of power module 100, which is 0.6V. The circuit parameter design basis is clearly defined to ensure that the output voltage is adaptively adjusted with temperature.

[0046] In one specific embodiment, resistor R31 (200Ω) has a resistance of 19.1KΩ, resistor R32 (300Ω) has a resistance of 20.5KΩ, resistor R40 (400Ω) has a resistance of 33KΩ, and resistor R41 (500Ω) has a resistance of 10KΩ. This combination of resistance values, verified through experiments, optimizes temperature sensitivity, ensuring the output voltage remains stable at 0.95V~1.2V within the range of -40℃ to 120℃.

[0047] In one specific embodiment, the input pin 4 of the power module 100 is connected to an input filter capacitor to filter out high-frequency noise from the input power supply and improve the conversion efficiency and stability of the power module 100.

[0048] In one specific embodiment, pin 3 of the power module 100 is connected to an inductor and an output filter capacitor to suppress the ripple noise of the switching power supply, ensure smooth output voltage, and reduce interference to the main control chip.

[0049] In one specific embodiment, pin 1 of the power module 100 is adapted to electrically connect to the control module, supporting external enable control, realizing power start-stop management, and enhancing system flexibility.

[0050] In one specific embodiment, pin 2 of the power module 100 is grounded to reduce circuit noise and improve anti-interference capability.

[0051] In one specific embodiment, the power module 100 is model RY3430.

[0052] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A main control chip abnormality adjustment circuit, characterized in that, include: A power module is used to convert input voltage into output voltage; A feedback resistor circuit is connected to pin 5 of the power module to adjust the output voltage through a voltage divider relationship; A thermistor circuit, connected in parallel or series with the feedback resistor circuit, is used to dynamically adjust the voltage division ratio according to the ambient temperature.

2. The main control chip abnormal adjustment circuit according to claim 1, characterized in that, The feedback resistor circuit includes resistors R31 and R32; The R31 resistor is suitable for electrical connection to the power supply, and the R31 resistor is connected in series with the R32 resistor. The pin 5 of the power module is electrically connected to the voltage divider node of the R31 resistor and the R32 resistor. The R32 resistor is grounded.

3. The main control chip abnormality adjustment circuit according to claim 2, characterized in that, The thermistor circuit includes resistors R40 and R41; The R41 resistor is a thermistor; The R40 resistor is suitable for electrical connection to a power source, and the R40 resistor is connected in series with the R41 resistor. The R40 resistor and the R41 resistor are connected in parallel with the R31 resistor.

4. The main control chip abnormality adjustment circuit according to claim 3, characterized in that, The output voltage satisfies the following relationship: in, The R is equivalent to the parallel resistance value of R31 resistor, R40 resistor, and R41 resistor connected in series. The voltage v is the reference voltage of the power module, and the reference voltage is 0.6V.

5. The main control chip abnormality adjustment circuit according to claim 4, characterized in that, The resistance of resistor R31 is 19.1K. The resistance of the R32 resistor is 20.5KΩ; The resistance of the R40 resistor is 33K; The resistance of resistor R41 is 10K.

6. The main control chip abnormality adjustment circuit according to claim 1, characterized in that, The input pin 4 of the power module is connected to an input filter capacitor.

7. The main control chip abnormality adjustment circuit according to claim 1, characterized in that, Pin 3 of the power module is connected to an inductor and an output filter capacitor.

8. The main control chip abnormality adjustment circuit according to claim 1, characterized in that, Pin 1 of the power module is suitable for electrical connection to the control module.

9. The main control chip abnormality adjustment circuit according to claim 1, characterized in that, Pin 2 of the power module is grounded.

10. The main control chip abnormality adjustment circuit according to claim 1, characterized in that, The power module is model RY3430.

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