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CN-224233545-U - Main control chip abnormity adjusting circuit

CN224233545UCN 224233545 UCN224233545 UCN 224233545UCN-224233545-U

Abstract

The application relates to an abnormal regulating circuit of a main control chip, which comprises a power supply module, a feedback resistor circuit and a thermistor circuit, wherein the power supply module is used for converting input voltage into output voltage, the feedback resistor circuit is connected to a pin 5 of the power supply module, the output voltage is regulated through a voltage division relationship, the thermistor circuit is connected in parallel or in series with a feedback resistor network and is used for dynamically regulating the voltage division ratio according to the ambient temperature, the deviation of the output voltage is automatically compensated through the characteristic that the resistance value of the thermistor changes along with the temperature, and the power supply stability of the main control chip at different temperatures is ensured. Specifically, because the high temperature and the low temperature are different in voltage requirements, the R41 resistor serving as a thermistor is used for adjusting the voltage in a matched manner, the resistance of the thermistor is reduced at the high temperature, the core voltage is relatively reduced, and the resistance of the thermistor is increased at the low temperature, so that the output of the core voltage is increased, and the thermistor has enough driving capability to enable the main control chip to work normally.

Inventors

  • LI XI
  • Si Mengjia

Assignees

  • 北京睿智奥恒视觉科技有限公司

Dates

Publication Date
20260512
Application Date
20250314

Claims (10)

  1. 1. An anomaly adjustment circuit for a main control chip is characterized by comprising: The power module is used for converting the input voltage into output voltage; The feedback resistor circuit is connected to the pin 5 of the power supply module and used for adjusting the output voltage through a voltage division relationship; And the thermistor circuit is connected with the feedback resistor circuit in parallel or in series and is used for dynamically adjusting the voltage dividing ratio according to the ambient temperature.
  2. 2. The master control chip anomaly adjustment circuit of claim 1, wherein the feedback resistance circuit comprises an R31 resistance and an R32 resistance; The R31 resistor is suitable for being electrically connected with a power supply, the R31 resistor is connected with the R32 resistor in series, and the pin 5 of the power supply module is electrically connected to a voltage division node of the R31 resistor and the R32 resistor; The R32 resistor is grounded.
  3. 3. The master chip anomaly adjustment circuit of claim 2, wherein the thermistor circuit comprises an R40 resistor and an R41 resistor; The R41 resistor is a thermistor; The R40 resistor is suitable for being electrically connected with a power supply, the R40 resistor is connected with the R41 resistor in series, and the R40 resistor and the R41 resistor are connected with the R31 resistor in parallel.
  4. 4. The master chip anomaly adjustment circuit of claim 3, wherein the output voltage satisfies a relationship: Wherein, the The R equivalent is a parallel resistance value obtained by connecting an R31 resistor, an R40 resistor and an R41 resistor in series; and V is the reference voltage of the power supply module, and the reference voltage is 0.6V.
  5. 5. The master control chip abnormality adjustment circuit according to claim 4, wherein the resistance value of the R31 resistor is 19.1K; The resistance value of the R32 resistor is 20.5K; The resistance value of the R40 resistor is 33K; The resistance value of the R41 resistor is 10K.
  6. 6. The abnormality adjustment circuit of a main control chip according to claim 1, wherein an input filter capacitor is connected to an input pin 4 of the power module.
  7. 7. The anomaly adjustment circuit of the main control chip according to claim 1, wherein the pin 3 of the power module is connected with an inductor and an output filter capacitor.
  8. 8. The anomaly adjustment circuit of claim 1, wherein pin 1 of the power module is adapted to electrically connect to a control module.
  9. 9. The master control chip anomaly adjustment circuit of claim 1, wherein pin 2 of the power module is grounded.
  10. 10. The master chip anomaly adjustment circuit of claim 1, wherein the power module is model RY3430.

Description

Main control chip abnormity adjusting circuit Technical Field The application relates to the technical field of electronic circuits, in particular to an abnormal regulating circuit of a main control chip. Background In a high and low temperature environment, as shown in fig. 2, the operating voltage of an FPGA (field programmable gate array) may be floated due to temperature variation, resulting in abnormal operation, and such voltage floating may be caused by a power module, a PCB layout, a thermal design, or temperature characteristics of the FPGA itself. In practical application, as the ambient temperature increases or decreases, some power modules may deviate from the theoretical design voltage at normal temperature due to the unsatisfied ambient temperature, and when the deviation results in a voltage value exceeding the voltage range required by the FPGA chip, some abnormal conditions may occur. Disclosure of utility model In order to solve the problem that the power supply module is larger in change along with temperature, the utility model provides an abnormal regulating circuit of a main control chip, which comprises the following components: The power module is used for converting the input voltage into output voltage; The feedback resistor circuit is connected to the pin 5 of the power supply module and used for adjusting the output voltage through a voltage division relationship; And the thermistor circuit is connected with the feedback resistor circuit in parallel or in series and is used for dynamically adjusting the voltage dividing ratio according to the ambient temperature. In one possible implementation, the feedback resistance circuit includes an R31 resistance and an R32 resistance; The R31 resistor is suitable for being electrically connected with a power supply, the R31 resistor is connected with the R32 resistor in series, and the pin 5 of the power supply module is electrically connected to a voltage division node of the R31 resistor and the R32 resistor; The R32 resistor is grounded. In one possible implementation, the thermistor circuit includes an R40 resistor and an R41 resistor; The R41 resistor is a thermistor; The R40 resistor is suitable for being electrically connected with a power supply, the R40 resistor is connected with the R41 resistor in series, and the R40 resistor and the R41 resistor are connected with the R31 resistor in parallel. In one possible implementation, the output voltage satisfies the relation: Wherein, the method comprises the steps of, The R equivalent is a parallel resistance value obtained by connecting an R31 resistor, an R40 resistor and an R41 resistor in series; and V is the reference voltage of the power supply module, and the reference voltage is 0.6V. In one possible implementation, the R31 resistor has a resistance of 19.1K; The resistance value of the R32 resistor is 20.5K; The resistance value of the R40 resistor is 33K; The resistance value of the R41 resistor is 10K. In one possible implementation, the input pin 4 of the power module is connected with an input filter capacitor. In one possible implementation, the pin 3 of the power module is connected with an inductor and an output filter capacitor. In one possible implementation, the pin 1 of the power module is adapted to electrically connect to a control module. In one possible implementation, the pin 2 of the power module is grounded. In one possible implementation, the power module is model RY3430. The main control chip abnormality adjusting circuit has the beneficial effects that the output voltage deviation is automatically compensated through the characteristic that the resistance value of the thermistor changes along with the temperature, so that the power supply stability of the main control chip at different temperatures is ensured. Specifically, because the high temperature and the low temperature are different in voltage requirements, the R41 resistor serving as a thermistor is used for adjusting the voltage in a matched manner, the resistance of the thermistor is reduced at the high temperature, the core voltage is relatively reduced, and the resistance of the thermistor is increased at the low temperature, so that the output of the core voltage is increased, and the thermistor has enough driving capability to enable the main control chip to work normally. Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings. Drawings The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the application and together with the description, serve to explain the principles of the application. Fig. 1 shows a schematic diagram of an abnormality adjustment circuit of a main control chip according to an embodiment of the present application; fig. 2 shows a