Voltage source step-down control circuit used in chip

Abstract

The utility model discloses a voltage source step-down control circuit used in a chip, which relates to the technical field of voltage control, and comprises a power supply module used for accessing electric energy; the protection control module is used for regularly controlling the voltage source control module to stop working during over-temperature; the voltage source control module is used for providing reference voltage; the temperature detection module is used for detecting over-temperature and reducing the voltage value of the reference voltage during over-temperature; the voltage sampling module is used for voltage sampling; and the power supply adjusting module is used for receiving the reference voltage and the voltage signal and carrying out voltage stabilization processing and voltage reduction adjustment, and is used for supplying power to the intelligent control module. According to the voltage source voltage reduction control circuit used in the chip, the power supply adjusting module is matched with the voltage source control module and the voltage sampling module to carry out voltage stabilization adjustment on input direct current electric energy, when the temperature detection module detects over-temperature, the voltage value of the reference voltage is reduced, then voltage reduction control is carried out, and when the over-temperature time is too long, the voltage value of the reference voltage is reduced. And stopping power supply.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage control, in particular to a voltage source step-down control circuit used in a chip. Background Art

[0002] A voltage source is a circuit element or system that can provide a stable voltage output. It is often used inside chips to provide precise and controllable DC voltage for voltage regulation, calibration and other needs. The voltage provided by the existing voltage source inside the chip is a fixed value. When the temperature of the chip becomes abnormal during use, in order to reduce the operating temperature by reducing the voltage, it is necessary to change the hardware, that is, to add a new voltage reduction device to perform the voltage reduction process. The operation is cumbersome and costly, so it needs to be improved. Utility Model Content

[0003] The embodiment of the utility model provides a voltage source step-down control circuit used in a chip to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A voltage source step-down control circuit for a chip, comprising: a power supply module, a temperature detection module, a protection control module, a voltage source control module, a voltage sampling module, a power supply adjustment module and an intelligent control module;

[0006] A power module, used to access DC power;

[0007] A temperature detection module, connected to the voltage source control module, for performing temperature detection and over-temperature judgment, and for outputting a first control signal when over-temperature occurs;

[0008] A protection control module, connected to the voltage source control module and the temperature detection module, configured to receive a first control signal and output a second control signal in a timely manner;

[0009] A voltage source control module, connected to the power supply regulating module, used to provide a reference voltage for the power supply regulating module, used to receive a first control signal and reduce a voltage value of the reference voltage, and used to receive a second control signal and stop providing the reference voltage;

[0010] A voltage sampling module, connected to the intelligent control module, for sampling the voltage of the electric energy input into the intelligent control module and outputting a voltage signal;

[0011] A power supply regulating module, connected to the power supply module and the voltage sampling module, for receiving the reference voltage provided by the voltage source control module and the voltage signal output by the voltage sampling module and performing voltage stabilization and voltage reduction regulation on the connected DC power;

[0012] The intelligent control module is connected to the power supply regulating module and is used to receive the regulated voltage output by the power supply regulating module.

[0013] As a further solution of the utility model: the power module includes a power interface; the power regulation module includes a power regulator; the intelligent control module includes a processor;

[0014] Preferably, the first end of the power interface is connected to the input end of the power regulator, the output end of the power regulator is connected to the first end of the processor, the second end of the processor and the second end of the power interface are both grounded, the reference power end of the power regulator is connected to the voltage source control module, and the feedback end of the power regulator is connected to the voltage sampling module.

[0015] As a further solution of the utility model: the voltage sampling module includes a seventh resistor and an eighth resistor;

[0016] Preferably, one end of the seventh resistor is connected to the first end of the processor, and the second end of the seventh resistor is connected to the feedback end of the power regulator and is grounded through the eighth resistor.

[0017] As a further solution of the utility model: the voltage source control module includes a voltage source, a fourth resistor, a first voltage stabilizer, a sixth resistor and a second voltage stabilizer;

[0018] Preferably, the voltage source is connected to the cathode of the first regulator, the cathode of the second regulator and the reference power supply terminal of the power regulator through a fourth resistor, the anode of the first regulator is connected to the anode of the second regulator and the ground terminal through a sixth resistor, the reference terminal of the first regulator is connected to the temperature detection module, and the reference terminal of the second regulator is connected to the protection control module.

[0019] As a further solution of the utility model: the temperature detection module includes a thermistor, a first resistor, a second resistor, a third resistor, a first comparator and a fifth resistor;

[0020] Preferably, one end of the thermistor is connected to one end of the second resistor and the voltage source, the other end of the thermistor is connected to the in-phase end of the first comparator and to the ground end through the first resistor, the other end of the second resistor is connected to the inverting end of the first comparator and to the ground through the third resistor, and the output end of the first comparator is connected to the protection control module and to the reference end of the first regulator through the fifth resistor.

[0021] As a further solution of the utility model: the protection control module includes a ninth resistor, a first capacitor and a tenth resistor;

[0022] Preferably, one end of the ninth resistor is connected to the output end of the first comparator, the other end of the ninth resistor is connected to one end of the first capacitor, one end of the tenth resistor and the reference end of the second regulator, and the other end of the first capacitor and the other end of the tenth resistor are both grounded.

[0023] Compared with the prior art, the utility model has the following beneficial effects: the voltage source step-down control circuit used in the chip can provide a reference voltage for the power regulation module by the voltage source control module, and the power regulation module cooperates with the voltage signal sampled by the voltage sampling module to stabilize and regulate the input DC power so as to provide working power for the intelligent control module, and the temperature detection module performs over-temperature detection, and when the temperature is over, reduces the voltage value of the reference voltage provided by the voltage source control module, and then performs the voltage reduction operation, thereby improving the safety and working efficiency of the chip, and stops providing the reference voltage for protection when the over-temperature time is too long, without adding a step-down device, and the operation is convenient and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The utility model provides a schematic block diagram of a voltage source step-down control circuit for use inside a chip.

[0026] Figure 2 A circuit diagram of a voltage source step-down control circuit for an internal chip provided in an example of the utility model.

[0027] Figure 3 This is a connection circuit diagram of the protection control module provided by the example of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In one embodiment, see Figure 1 , a voltage source step-down control circuit for a chip, comprising: a power supply module 1, a temperature detection module 2, a protection control module 3, a voltage source control module 4, a voltage sampling module 5, a power supply adjustment module 6 and an intelligent control module 7;

[0030] Specifically, the power module 1 is used to access DC power;

[0031] The temperature detection module 2 is connected to the voltage source control module 4 and is used for temperature detection and over-temperature judgment, and is used for outputting a first control signal when the temperature is over-temperature;

[0032] A protection control module 3, connected to the voltage source control module 4 and the temperature detection module 2, for receiving a first control signal and outputting a second control signal in a timely manner;

[0033] A voltage source control module 4, connected to the power supply regulating module 6, for providing a reference voltage for the power supply regulating module 6, for receiving a first control signal and reducing a voltage value of the reference voltage, and for receiving a second control signal and stopping providing the reference voltage;

[0034] A voltage sampling module 5, connected to the intelligent control module 7, for sampling the voltage of the electric energy input into the intelligent control module 7 and outputting a voltage signal;

[0035] The power supply regulating module 6 is connected to the power supply module 1 and the voltage sampling module 5, and is used to receive the reference voltage provided by the voltage source control module 4 and the voltage signal output by the voltage sampling module 5, and to perform voltage stabilization and voltage reduction regulation on the connected DC power;

[0036] The intelligent control module 7 is connected to the power supply regulating module 6 and is used for receiving the regulated voltage output by the power supply regulating module 6 .

[0037] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of a power supply interface to access DC power; the temperature detection module 2 can adopt a temperature detection circuit composed of a comparator, a resistor, etc. to perform temperature detection and over-temperature judgment; the protection control module 3 can adopt a protection control circuit composed of a capacitor, a resistor, etc., and start timing when over-temperature occurs through timing, and control the voltage source control module 4 to stop providing a reference voltage after the timing ends; the voltage source control module 4 can adopt a voltage source control circuit composed of a voltage source, a resistor, a voltage stabilizer, etc. to provide a reference voltage and adjust the voltage value of the reference voltage; the voltage sampling module 5 can adopt a voltage sampling circuit composed of a resistor to perform voltage sampling on the electric energy input to the intelligent control module 7; the power regulation module 6 can adopt a power regulation circuit composed of a power regulator, and can perform voltage regulation processing according to the signals output by the voltage sampling module 5 and the voltage source control module 4; the intelligent control module 7 can adopt an intelligent control circuit composed of a processor to perform logic control.

[0038] In another embodiment, see Figure 1 , Figure 2 and Figure 3 , the power module 1 includes a power interface; the power regulation module 6 includes a power regulator; the intelligent control module 7 includes a processor;

[0039] Specifically, the first end of the power supply interface is connected to the input end of the power supply regulator, the output end of the power supply regulator is connected to the first end of the processor, the second end of the processor and the second end of the power supply interface are both grounded, the reference power supply end of the power supply regulator is connected to the voltage source control module 4, and the feedback end of the power supply regulator is connected to the voltage sampling module 5.

[0040] In a specific embodiment, the parameter power supply end of the above-mentioned power regulator receives a reference voltage provided by the voltage source control module 4 and uses it as a parameter voltage so that the input electric energy can be stabilized and regulated according to the voltage signal sampled by the voltage sampling module 5, and the specific model is not limited; the above-mentioned processor can adopt an MCU processor, and the specific model is not limited.

[0041] Further, the voltage sampling module 5 includes a seventh resistor R7 and an eighth resistor R8;

[0042] Specifically, one end of the seventh resistor R7 is connected to the first end of the processor, and the second end of the seventh resistor R7 is connected to the feedback end of the power regulator and is grounded through the eighth resistor R8.

[0043] In a specific embodiment, the seventh resistor R7 and the eighth resistor R8 perform voltage division processing on the electric energy input to the processor, and then perform voltage sampling.

[0044] Further, the voltage source control module 4 includes a voltage source, a fourth resistor R4, a first voltage stabilizer U1, a sixth resistor R6 and a second voltage stabilizer U2;

[0045] Specifically, the voltage source is connected to the cathode of the first voltage regulator U1, the cathode of the second voltage regulator U2 and the reference power supply terminal of the power regulator through the fourth resistor R4, the anode of the first voltage regulator U1 is connected to the anode of the second voltage regulator U2 and the ground terminal through the sixth resistor R6, the reference end of the first voltage regulator U1 is connected to the temperature detection module 2, and the reference end of the second voltage regulator U2 is connected to the protection control module 3.

[0046] In a specific embodiment, both the first voltage stabilizer U1 and the second voltage stabilizer U2 can be LM431 three-terminal voltage stabilizer; the voltage source provides a fixed voltage value, which will not be described in detail here.

[0047] Further, the temperature detection module 2 includes a thermistor NTC, a first resistor R1, a second resistor R2, a third resistor R3, a first comparator A1 and a fifth resistor R5;

[0048] Specifically, one end of the thermistor NTC is connected to one end of the second resistor R2 and the voltage source, the other end of the thermistor NTC is connected to the in-phase end of the first comparator A1 and is connected to the ground end through the first resistor R1, the other end of the second resistor R2 is connected to the inverting end of the first comparator A1 and is grounded through the third resistor R3, and the output end of the first comparator A1 is connected to the protection control module 3 and is connected to the reference end of the first regulator U1 through the fifth resistor R5.

[0049] In a specific embodiment, the thermistor NTC may be a thermistor with a negative temperature coefficient; the first comparator A1 may be a LM358 comparator; and the second resistor R2 and the third resistor R3 provide an over-temperature threshold.

[0050] Further, the protection control module 3 includes a ninth resistor R9, a first capacitor C1 and a tenth resistor R10;

[0051] Specifically, one end of the ninth resistor R9 is connected to the output end of the first comparator A1, the other end of the ninth resistor R9 is connected to one end of the first capacitor C1, one end of the tenth resistor R10 and the reference end of the second regulator U2, and the other end of the first capacitor C1 and the other end of the tenth resistor R10 are both grounded.

[0052] In a specific embodiment, the first capacitor C1 may be an energy storage capacitor, and cooperate with the ninth resistor R9 and the tenth resistor R10 to perform timing control.

[0053] In a voltage source step-down control circuit used inside a chip in the present embodiment, direct current power is connected by a power interface, and the voltage source cooperates with the fourth resistor R4 to provide a reference voltage for a power regulator, so that the power regulator cooperates with the voltage signal sampled by the seventh resistor R7 and the eighth resistor R8 to stabilize the connected direct current power, so as to provide stabilized power for the processor. At the same time, the thermistor NTC detects the temperature of the processor, and the second resistor R2 and the third resistor R3 provide an over-temperature threshold. When the temperature is over, the resistance of the thermistor NTC decreases, the first comparator A1 will output a high level, and control the first voltage regulator U1 to turn on, the sixth resistor R6 cooperates with the fourth resistor R4 to divide the reference voltage provided by the voltage source, and then the power regulator performs a step-down process, and at the same time the first capacitor C1 stores energy. When the stored power reaches a certain value, the second voltage regulator U2 will be controlled to turn on, so that the reference power supply end of the power regulator is at a low level, the power regulator stops supplying power, and the processor stops working.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A voltage source step-down control circuit for a chip, characterized in that: The voltage source step-down control circuit used in the chip includes: a power supply module, a temperature detection module, a protection control module, a voltage source control module, a voltage sampling module, a power supply adjustment module and an intelligent control module; The power module is used to access direct current power; The temperature detection module is connected to the voltage source control module, and is used to detect the temperature and make an over-temperature judgment, and is used to output a first control signal when the temperature is over-temperature; The protection control module is connected to the voltage source control module and the temperature detection module, and is used to receive a first control signal and output a second control signal in a timely manner; The voltage source control module is connected to the power supply regulating module, and is used to provide a reference voltage for the power supply regulating module, to receive a first control signal and reduce a voltage value of the reference voltage, and to receive a second control signal and stop providing the reference voltage; The voltage sampling module is connected to the intelligent control module and is used to perform voltage sampling on the electric energy input into the intelligent control module and output a voltage signal; The power supply regulating module is connected to the power supply module and the voltage sampling module, and is used to receive the reference voltage provided by the voltage source control module and the voltage signal output by the voltage sampling module, and to perform voltage stabilization and voltage reduction regulation on the connected DC power; The intelligent control module is connected to the power supply regulating module and is used to receive the regulated voltage output by the power supply regulating module.

2. A voltage source step-down control circuit for use in a chip according to claim 1, characterized in that: The power module includes a power interface; the power regulation module includes a power regulator; the intelligent control module includes a processor; The first end of the power interface is connected to the input end of the power regulator, the output end of the power regulator is connected to the first end of the processor, the second end of the processor and the second end of the power interface are both grounded, the reference power end of the power regulator is connected to the voltage source control module, and the feedback end of the power regulator is connected to the voltage sampling module.

3. A voltage source step-down control circuit for a chip according to claim 2, characterized in that: The voltage sampling module includes a seventh resistor and an eighth resistor; One end of the seventh resistor is connected to the first end of the processor, and the second end of the seventh resistor is connected to the feedback end of the power regulator and is grounded through the eighth resistor.

4. The voltage source step-down control circuit for a chip according to claim 3, characterized in that: The voltage source control module includes a voltage source, a fourth resistor, a first voltage stabilizer, a sixth resistor and a second voltage stabilizer; The voltage source is connected to the cathode of the first regulator, the cathode of the second regulator and the reference power supply terminal of the power regulator through a fourth resistor, the anode of the first regulator is connected to the anode of the second regulator and the ground terminal through a sixth resistor, the reference terminal of the first regulator is connected to the temperature detection module, and the reference terminal of the second regulator is connected to the protection control module.

5. The voltage source step-down control circuit for a chip according to claim 4, characterized in that: The temperature detection module includes a thermistor, a first resistor, a second resistor, a third resistor, a first comparator and a fifth resistor; One end of the thermistor is connected to one end of the second resistor and the voltage source, the other end of the thermistor is connected to the in-phase end of the first comparator and is connected to the ground end through the first resistor, the other end of the second resistor is connected to the inverting end of the first comparator and is grounded through the third resistor, and the output end of the first comparator is connected to the protection control module and is connected to the reference end of the first regulator through the fifth resistor.

6. The voltage source step-down control circuit for a chip according to claim 5, characterized in that: The protection control module includes a ninth resistor, a first capacitor and a tenth resistor; One end of the ninth resistor is connected to the output end of the first comparator, the other end of the ninth resistor is connected to one end of the first capacitor, one end of the tenth resistor and the reference end of the second regulator, and the other end of the first capacitor and the other end of the tenth resistor are both grounded.

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