CN219436864U - Power supply circuit, processor system and vehicle - Google Patents

Power supply circuit, processor system and vehicle Download PDF

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Publication number
CN219436864U
CN219436864U CN202320277241.5U CN202320277241U CN219436864U CN 219436864 U CN219436864 U CN 219436864U CN 202320277241 U CN202320277241 U CN 202320277241U CN 219436864 U CN219436864 U CN 219436864U
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voltage
power supply
resistor
triode
supply circuit
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薛张涛
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Beijing Co Wheels Technology Co Ltd
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Beijing Co Wheels Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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Abstract

The present disclosure proposes a power supply circuit, a processor system and a vehicle, wherein the power supply circuit comprises: the output end of the first conversion power supply outputs a first voltage; the input end of the second conversion power supply is connected with the output end of the first conversion power supply, the output end of the second conversion power supply outputs a second voltage which changes in the same direction with the first voltage, and the difference value between the first voltage and the second voltage is smaller than a set threshold value. In the power supply circuit, the processor system and the vehicle, the first conversion power supply supplies power to the second conversion power supply, so that the passive control of the power-on and power-off time sequences of different output voltages of the power supply circuit is realized, the difference value between the first voltage and the second voltage can be smaller than a set threshold value at any time, the damage to loads is avoided, and the stability of the power supply circuit is effectively improved.

Description

Power supply circuit, processor system and vehicle
Technical Field
The present disclosure relates to the field of power supply technologies, and in particular, to a power supply circuit, a processor system, and a vehicle.
Background
In order to meet different use demands, the power supply circuit needs to provide different output voltages, and the power supply circuit needs to strictly control the power on and off time sequence of each output voltage so as to ensure that the pressure difference between each output voltage at any time is smaller than a set threshold value, thereby avoiding the damage of loads, but the current time sequence control mode has poor stability and is difficult to meet the use demands.
Disclosure of Invention
The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.
To this end, an object of the present disclosure is to provide a power supply circuit, a processor system and a vehicle.
To achieve the above object, a first aspect of the present disclosure provides a power supply circuit, including: the output end of the first conversion power supply outputs a first voltage; the input end of the second conversion power supply is connected with the output end of the first conversion power supply, the output end of the second conversion power supply outputs second voltage which changes in the same direction with the first voltage, and the difference value between the first voltage and the second voltage is smaller than a set threshold value.
Optionally, the second switching power supply includes: the first end of the first resistor is connected with the output end of the first conversion power supply; the first end of the voltage division module is connected with the second end of the first resistor, and the second end of the voltage division module is grounded; the second end of the first resistor outputs the second voltage, and the power supply voltage of the second conversion power supply is smaller than that of the first conversion power supply.
Optionally, the voltage dividing module includes: the triode is NPN, the collector electrode of the triode is connected with the second end of the first resistor, and the emitter electrode of the triode is grounded; and the first end of the control unit is connected with the collector electrode of the triode, and the second end of the control unit is connected with the base electrode of the triode.
Optionally, the control unit includes: the output end of the operational amplifier is connected with the base electrode of the triode; the first end of the reference voltage component is connected with the collector electrode of the triode, and the second end of the reference voltage component is connected with the inverting input end of the operational amplifier; and the first end of the voltage feedback component is connected with the first end of the reference voltage component, and the second end of the voltage feedback component is connected with the non-inverting input end of the operational amplifier.
Optionally, the reference voltage component includes: the first end of the second resistor is connected with the collector electrode of the triode, and the second end of the second resistor is connected with the inverting input end of the operational amplifier; the cathode of the voltage stabilizing diode is connected with the second end of the second resistor, the anode of the voltage stabilizing diode is grounded, and the reverse breakdown voltage of the voltage stabilizing diode is smaller than the power supply voltage of the first conversion power supply.
Optionally, the voltage feedback component includes: the first end of the third resistor is connected with the first end of the reference voltage component, and the second end of the third resistor is connected with the non-inverting input end of the operational amplifier; and 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 grounded.
Optionally, the voltage feedback assembly further includes: the first end of the first capacitor is connected with the first end of the reference voltage component, the first end of the third resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the second end of the third resistor.
Optionally, the second switching power supply further includes: and the first end of the second capacitor is connected with the first end of the voltage dividing module, and the second end of the second capacitor is grounded.
A second aspect of the present disclosure provides a processor system comprising: the power supply circuit as provided in the first aspect of the present disclosure.
A third aspect of the present disclosure provides a vehicle comprising: a processor system as provided in the second aspect of the present disclosure.
The technical scheme provided by the disclosure can comprise the following beneficial effects:
the first switching power supply supplies power to the second switching power supply, so that the passive control of the power supply circuit on and off time sequences of different output voltages is realized, the difference value between the first voltage and the second voltage can be smaller than a set threshold value at any time, the damage to loads is avoided, and the stability of the power supply circuit is effectively improved.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic diagram of a power supply circuit according to an embodiment of the disclosure;
FIG. 2 is a schematic diagram of a power supply circuit according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of a power supply circuit according to an embodiment of the disclosure;
FIG. 4 is a schematic diagram of a power supply circuit according to an embodiment of the disclosure;
FIG. 5 is a schematic diagram of a power supply circuit according to an embodiment of the disclosure;
FIG. 6 is a schematic diagram of a power supply circuit according to an embodiment of the disclosure;
FIG. 7 is a schematic diagram of a power supply circuit according to an embodiment of the disclosure;
as shown in the figure: 1. a first switching power supply;
2. a second switching power supply;
21. the voltage division module 211, the control unit 2111, the reference voltage component 2112 and the voltage feedback component;
r1, a first resistor, R2, a second resistor, R3, a third resistor, R4 and a fourth resistor;
c1, a first capacitor, C2 and a second capacitor;
q1, triode, U1, operational amplifier, Z1, zener diode.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
In the related embodiment, the power supply circuit includes a plurality of output voltages, and the power management chip (Power Management Integrated Circuits, PMIC) controls the power-on and power-off time sequence of each output voltage, but this mode belongs to active control, when abnormal power-off occurs in the power management chip, it cannot be guaranteed that the voltage difference between each output voltage is smaller than a set threshold value at any time, and when the voltage difference between each output voltage is not smaller than the set threshold value, the load is damaged.
As shown in fig. 1, the embodiment of the disclosure provides a power supply circuit, which includes a first conversion power supply 1 and a second conversion power supply 2, wherein an output end of the first conversion power supply 1 outputs a first voltage, an input end of the second conversion power supply 2 is connected with an output end of the first conversion power supply 1, an output end of the second conversion power supply 2 outputs a second voltage which changes in the same direction as the first voltage, and a difference value between the first voltage and the second voltage is smaller than a set threshold.
It can be understood that the input end of the second conversion power supply 2 is connected with the output end of the first conversion power supply 1, so that the first conversion power supply 1 supplies power to the second conversion power supply 2, the second conversion power supply 2 can synchronously power up and down with the first conversion power supply 1, the second conversion power supply 2 converts the first voltage output by the first conversion power supply 1, outputs the second voltage which changes in the same direction with the first voltage, and controls the difference value between the second voltage and the first voltage to be always smaller than the set threshold value, so that the state that the difference value between the first voltage and the second voltage is larger than or equal to the set threshold value is avoided.
Therefore, the mode of synchronously converting the output voltage of the first conversion power supply 1 by the second conversion power supply 2 realizes the passive control of the power-on and power-off time sequences of different output voltages of the power supply circuit, so that the difference value between the first voltage and the second voltage can be smaller than a set threshold value at any time, the damage to loads is avoided, and the stability of the power supply circuit is effectively improved.
It should be noted that, the converted power supply refers to a power supply that converts an input voltage into a required voltage, where a specific type of the first converted power supply 1 may be set according to an actual requirement, which is not limited, and the first converted power supply 1 may be a power converter, where the power converter includes an input end, an output end and an enable end, after the input end of the power converter inputs electric energy, if the enable end of the first converted power supply 1 is at a low level, the output end of the power converter does not output electric energy, and if the enable end of the first converted power supply 1 is at a high level, the power converter converts the input electric energy and outputs the converted electric energy from the output end of the power converter.
The specific values of the power supply voltage of the first conversion power supply 1, the power supply voltage of the second conversion power supply 2, and the set threshold value may be set according to actual needs, which is not limited to this, and the power supply voltage of the first conversion power supply 1 may be equal to the power supply voltage of the second conversion power supply 2, and the power supply voltage of the second conversion power supply 2 may be smaller than the power supply voltage of the first conversion power supply 1. When the power supply voltage of the second switching power supply 2 is smaller than the power supply voltage of the first switching power supply 1, the power supply voltage of the first switching power supply 1 may be 3.3V, that is, the first voltage output by the first switching power supply 1 is 3.3V at maximum, the power supply voltage of the second switching power supply 2 may be 1.8V, that is, the second voltage output by the second switching power supply 2 is 1.8V at maximum, and the set threshold may be 1.89V.
The specific type of the second switching power supply 2 may be set according to actual needs, and is not limited thereto.
As shown in fig. 2, in some embodiments, the second switching power supply 2 includes a first resistor R1 and a voltage dividing module 21, a first end of the first resistor R1 is connected to an output terminal of the first switching power supply 1, a first end of the voltage dividing module 21 is connected to a second end of the first resistor R1, and a second end of the voltage dividing module 21 is grounded, where the second end of the first resistor R1 outputs a second voltage, and a power supply voltage of the second switching power supply 2 is smaller than a power supply voltage of the first switching power supply 1.
It can be understood that, when the first switching power supply 1 is powered up, since the first switching power supply 1 supplies power to the second switching power supply 2, and the first resistor R1 does not have a function of storing electric energy, the second switching power supply 2 can be powered up synchronously with the first switching power supply 1, and meanwhile, during the power-up process, since the power voltage of the second switching power supply 2 is smaller than the power voltage of the first switching power supply 1, when both the first voltage and the second voltage reach the power voltage of the second switching power supply 2, the second voltage does not rise any more, and the first voltage still continues to rise until reaching the power voltage of the first switching power supply 1, so that the time for the second voltage to rise to the power voltage of the second switching power supply 2 is earlier than the time for the first voltage to rise to the power voltage of the first switching power supply 1, thereby avoiding a state that the difference between the first voltage and the second voltage is not smaller than the set threshold.
When the first conversion power supply 1 is powered down, the first conversion power supply 1 supplies power to the second conversion power supply 2, and the first resistor R1 does not have a function of storing electric energy, so that the second conversion power supply 2 can be powered down synchronously with the first conversion power supply 1, and a state that the difference value between the first voltage and the second voltage is not smaller than a set threshold value is avoided.
Therefore, through the arrangement of the first resistor R1 and the voltage dividing module 21, the voltage dividing module 21 finally clamps the second voltage to the power voltage of the second conversion power supply 2, so that the second voltage can stably reach the power voltage of the second conversion power supply 2, meanwhile, a resistive path is formed through the first resistor R1, the problem of electric energy storage is avoided, the second conversion power supply 2 can synchronously power up and down with the first conversion power supply 1, the difference value between the first voltage and the second voltage can be smaller than a set threshold value at any time, damage to loads is avoided, and the stability of a power supply circuit is effectively improved.
It should be noted that, the first resistor R1 plays a role of voltage division and also plays a role of current limitation, and a specific resistance value of the first resistor R1 may be set according to actual needs, which is not limited, and an exemplary resistance value of the first resistor R1 may be 10Ω.
The resistive path refers to a resistive path, and a capacitive path and an inductive path corresponding to the resistive path, where the capacitive path refers to a capacitive path, the inductive path refers to an inductive path, and the capacitive path and the inductive path can store electric energy, and if only the capacitive path and/or the inductive path exist between the input end of the second switching power supply 2 and the output end of the second switching power supply 2, the power-on and power-off processes of the second switching power supply 2 are delayed relative to the first switching power supply 1, and finally, it cannot be guaranteed that the voltage difference between the output voltages at any time is smaller than the set threshold value.
The resistive path does not have the function of storing electric energy, so that the delay in the power-on and power-off processes of the second conversion power supply 2 is avoided through the arrangement of the resistive path, and further, the difference value between the first voltage and the second voltage can be smaller than a set threshold value at any time.
The voltage dividing module 21 is used for dividing and finally clamping the second voltage to the power voltage of the second conversion power supply 2, and the specific type of the voltage dividing module 21 can be set according to actual needs, which is not limited.
As shown in fig. 3, in some embodiments, the voltage dividing module 21 includes a transistor Q1 and a control unit 211, the transistor Q1 is of NPN type, a collector of the transistor Q1 is connected to a second end of the first resistor R1, an emitter of the transistor Q1 is grounded, a first end of the control unit 211 is connected to the collector of the transistor Q1, and a second end of the control unit 211 is connected to the base of the transistor Q1.
It can be understood that, during the power-up process of the second switching power supply 2, the control unit 211 can control the voltage of the base electrode of the triode Q1 according to the second voltage, and further control the state of the triode Q1, so that the triode Q1 can shunt the second end of the first resistor R1, and finally ensure that the second voltage is stabilized at a predetermined value.
Note that, the NPN transistor Q1 is formed by sandwiching a P (Positive) semiconductor between two N (Negative) semiconductors, a PN junction formed between the Emitter region and the Base region is referred to as an Emitter junction, a PN junction formed between the Collector region and the Base region is referred to as a Collector junction, and three leads are respectively referred to as an Emitter (Emitter), a Base (Base), and a Collector (Collector).
When the base voltage of the triode Q1 is smaller than the emitter voltage of the triode Q1 and the base voltage of the triode Q1 is smaller than the collector voltage of the triode Q1, the triode Q1 is in a cut-off state, and the collector and the emitter of the triode Q1 are cut off.
When the base voltage of the triode Q1 is greater than the emitter voltage of the triode Q1 and the base voltage of the triode Q1 is greater than the collector voltage of the triode Q1, the triode Q1 is in a saturated state, and the collector and the emitter of the triode Q1 are conducted.
When the base voltage of the triode Q1 is larger than the emitter voltage of the triode Q1 and the base voltage of the triode Q1 is smaller than the collector voltage of the triode Q1, the triode Q1 is in an amplifying state, and when the triode Q1 is in the amplifying state, the current between the collector and the emitter of the triode Q1 can be regulated by controlling the base voltage of the triode Q1, the larger the current is, the more the voltage division to the first voltage is, and the smaller the current is, the less the voltage division to the first voltage is. In the present disclosure, the transistor Q1 operates in an amplified state, and thus, the control unit 211 can adjust the second voltage by controlling the voltage of the base of the transistor Q1.
The control unit 211 is configured to control the voltage of the base of the transistor Q1 according to the second voltage, and the specific type of the control unit 211 may be set according to actual needs, which is not limited.
As shown in fig. 4, in some embodiments, the control unit 211 includes an operational amplifier U1, a reference voltage component 2111, and a voltage feedback component 2112, where an output terminal of the operational amplifier U1 is connected to a base of the transistor Q1, a first terminal of the reference voltage component 2111 is connected to a collector of the transistor Q1, a second terminal of the reference voltage component 2111 is connected to an inverting input terminal of the operational amplifier U1, a first terminal of the voltage feedback component 2112 is connected to a first terminal of the reference voltage component 2111, and a second terminal of the voltage feedback component 2112 is connected to a non-inverting input terminal of the operational amplifier U1.
It can be appreciated that, by setting the reference voltage component 2111, the reference voltage is input to the inverting input terminal of the operational amplifier U1, and by setting the voltage feedback component 2112, the feedback voltage is input to the non-inverting input terminal of the operational amplifier U1, so that the operational amplifier U1 can control the voltage of the base electrode of the triode Q1 according to the voltage of the non-inverting input terminal and the voltage of the inverting input terminal, and stable adjustment of the second voltage is ensured.
It should be noted that, the operational amplifier U1 is an electronic integrated circuit including a multi-stage amplifying circuit, the input stage is a differential amplifying circuit, which has high input resistance and zero drift suppression capability, the intermediate stage mainly performs voltage amplification, has high voltage amplification factor, generally consists of a common emitter amplifying circuit, and has the characteristics of high load capacity and low output resistance, and the specific type of the operational amplifier U1 can be set according to actual needs, which is not limited. The positive electrode of the operational amplifier U1 may be connected to the collector of the triode Q1, and the negative electrode of the operational amplifier is grounded.
The reference voltage component 2111 is configured to input a reference voltage to the inverting input terminal of the operational amplifier U1 according to the second voltage, and the specific type of the reference voltage component 2111 may be set according to actual needs, which is not limited.
As shown in fig. 5, in some embodiments, the reference voltage component 2111 includes a second resistor R2 and a zener diode Z1, a first end of the second resistor R2 is connected to the collector of the triode Q1, a second end of the second resistor R2 is connected to the inverting input terminal of the operational amplifier U1, a cathode of the zener diode Z1 is connected to the second end of the second resistor R2, an anode of the zener diode Z1 is grounded, and an inverting breakdown voltage of the zener diode Z1 is smaller than a power supply voltage of the first conversion power supply 1.
It can be understood that, in the process of powering up the second switching power supply 2, since the first end of the second resistor R2 is connected to the collector of the triode Q1, the second end of the second resistor R2 can always input the reference voltage to the inverting input terminal of the operational amplifier U1, and when the second end voltage of the second resistor R2 exceeds the inverting breakdown voltage of the zener diode Z1, the reference voltage input to the inverting input terminal of the operational amplifier U1 by the second end of the second resistor R2 is kept to be the inverting breakdown voltage of the zener diode Z1, so as to ensure the stability of the inverting input terminal of the operational amplifier U1, thereby ensuring that the operational amplifier U1 can control the voltage of the base of the triode Q1 according to the voltage of the non-inverting input terminal and the voltage of the inverting input terminal, and further ensuring the stable adjustment of the second voltage.
It should be noted that the second resistor R2 plays a role of current limiting, and a specific resistance value of the second resistor R2 may be set according to actual needs, which is not limited, and an exemplary resistance value of the second resistor R2 may be 100kΩ.
The zener diode Z1 is a diode with a voltage stabilizing function, which is manufactured by utilizing the phenomenon that the current of the PN junction is changed in a large range and the voltage is basically unchanged, and the specific type of the zener diode Z1 can be set according to actual needs, which is not limited.
The reverse breakdown voltage of the zener diode Z1 may be set according to actual needs, which is not limited thereto, and the reverse breakdown voltage of the zener diode Z1 may be 1.25V, for example.
The voltage feedback component 2112 is configured to input a feedback voltage to the non-inverting input terminal of the operational amplifier U1 according to the second voltage, and the specific type of the voltage feedback component 2112 may be set according to actual needs, which is not limited.
As shown in fig. 5, in some embodiments, the voltage feedback component 2112 includes a third resistor R3 and a fourth resistor R4, a first end of the third resistor R3 is connected to the first end of the reference voltage component 2111, a second end of the third resistor R3 is connected to the non-inverting input terminal of the operational amplifier U1, a first end of the fourth resistor R4 is connected to the second end of the third resistor R3, and a second end of the fourth resistor R4 is grounded.
It can be understood that, in the process of powering up the second switching power supply 2, since the first end of the third resistor R3 is connected to the first end of the reference voltage component 2111, the second end of the third resistor R3 can always input the feedback voltage to the non-inverting input end of the operational amplifier U1, so that the operational amplifier U1 can control the voltage of the base electrode of the triode Q1 according to the voltage of the non-inverting input end and the voltage of the inverting input end, and stable adjustment of the second voltage is further ensured.
The third resistor R3 and the fourth resistor R4 both play a role in voltage division, so that the voltage at the non-inverting input end of the operational amplifier U1 can follow up with the second voltage, and meanwhile damage of the operational amplifier U1 due to overlarge input voltage is avoided.
During the power-up process of the second switching power supply 2, the reference voltage component 2111 always inputs the reference voltage to the inverting input terminal of the operational amplifier U1, and the voltage of the second terminal of the third resistor R3 increases with the increase of the second voltage.
In the rising process, the voltage of the non-inverting input end of the operational amplifier U1 is larger than the voltage of the inverting input end, at this time, the voltage of the output end of the operational amplifier U1 rises along with the rising of the voltage of the non-inverting input end, and along with the rising of the voltage of the output end of the operational amplifier U1, the triode Q1 is converted into an amplifying state from a cut-off state, meanwhile, the current from the collector to the emitter of the triode Q1 also rises along with the rising, and the current distribution of the triode Q1 to the second end of the first resistor R1 is larger and larger until the second voltage reaches the power supply voltage of the second conversion power supply 2.
Note that, the third resistor R3 and the fourth resistor R4 each play a role of voltage division, specific resistance values of the third resistor R3 and the fourth resistor R4 may be set according to actual needs, which is not limited thereto, and the resistance value of the third resistor R3 may be 55kΩ and the resistance value of the fourth resistor R4 may be 125kΩ, for example.
As shown in fig. 5, in some embodiments, the voltage feedback component 2112 further includes a first capacitor C1, a first end of the first capacitor C1 is connected to the first end of the reference voltage component 2111, a first end of the third resistor R3 is connected to the first end of the first capacitor C1, and a second end of the first capacitor C1 is connected to the second end of the third resistor R3.
It can be appreciated that the first capacitor C1 is connected in parallel to the third resistor R3, so that the voltage feedback component 2112 can be filtered, thereby effectively alleviating the overshoot problem of the second voltage in the rising process, further improving the loop response of the voltage feedback component 2112, and ensuring that the power supply circuit can stably output the second voltage.
It should be noted that, the specific capacitance value of the first capacitor C1 may be set according to actual needs, which is not limited to this, and the capacitance value of the first capacitor C1 may be 3.3nF, for example.
As shown in fig. 5, in some embodiments, the second switching power supply 2 further includes a second capacitor C2, where a first end of the second capacitor C2 is connected to a first end of the voltage dividing module 21, and a second end of the second capacitor C2 is grounded.
It can be understood that the second capacitor C2 is connected in parallel to the first end of the voltage dividing module 21, so as to perform a voltage stabilizing function on the second voltage, thereby ensuring that the power supply circuit can stably output the second voltage.
It should be noted that, the specific capacitance value of the second capacitor C2 may be set according to actual needs, which is not limited to this, and the capacitance value of the second capacitor C2 may be 100nF, for example.
The simulation experiment is performed on the power supply circuit of the embodiment of the disclosure to obtain a simulation diagram as shown in fig. 6, where the resistance value of the first resistor R1 is 10Ω, the resistance value of the second resistor R2 is 100deg.C, the resistance value of the third resistor R3 is 55kΩ, the resistance value of the fourth resistor R4 is 125kΩ, the capacitance value of the first capacitor C1 is 1pF, and the capacitance value of the second capacitor C2 is 100deg.C, and meanwhile, the first end of the second capacitor C2 is connected with the resistance of 18Ω, where the resistance of 18Ω is used to simulate the load of the power supply circuit, so as to ensure that the simulation experiment of the power supply circuit is closer to the real state.
As shown in fig. 6, the abscissa in fig. 6 is time, and three ordinate from top to bottom in fig. 6 are the voltage value of the first voltage, the voltage value of the second voltage, and the difference between the first voltage and the second voltage, as can be seen from the figure, when the first switching power supply 1 is powered on, the first voltage rises to 3.3V, the rising time is 1ms, the second voltage rises to 1.8V, the rising time is less than 1ms, the difference between the first voltage and the second voltage is 1.498V at the maximum, and is less than the set threshold value 1.89V.
Meanwhile, as shown in fig. 6, there is an overshoot problem in the second voltage rising process, that is, the second voltage rises to 1.881V and then falls to 1.8V, so that the capacitance value of the first capacitor C1 is adjusted to 3.3nF, and a simulation diagram as shown in fig. 7 is obtained.
As shown in fig. 7, the abscissa in fig. 7 is time, and three ordinate from top to bottom in fig. 7 are the voltage value of the first voltage, the voltage value of the second voltage, and the difference between the first voltage and the second voltage, it can be seen that, in the process of rising the second voltage, the second voltage rises to 1.816V and then falls to 1.8V, and the maximum value of the second voltage is significantly reduced, so that by adjusting the capacitance value of the first capacitor C1, the loop response of the voltage feedback component 2112 can be improved.
The disclosed embodiments also provide a processor system including a power supply circuit as in the disclosed embodiments.
It can be understood that, when the first switching power supply 1 is powered up, since the first switching power supply 1 supplies power to the second switching power supply 2, and the first resistor R1 does not have a function of storing electric energy, the second switching power supply 2 can be powered up synchronously with the first switching power supply 1, and meanwhile, during the power-up process, since the power voltage of the second switching power supply 2 is smaller than the power voltage of the first switching power supply 1, when both the first voltage and the second voltage reach the power voltage of the second switching power supply 2, the second voltage does not rise any more, and the first voltage continues to rise until reaching the power voltage of the first switching power supply 1, so that the time for the second voltage to rise to the power voltage of the second switching power supply 2 is earlier than the time for the first voltage to rise to the power voltage of the first switching power supply 1, thereby avoiding a state that the difference between the first voltage and the second voltage is not smaller than the set threshold.
When the first conversion power supply 1 is powered down, the first conversion power supply 1 supplies power to the second conversion power supply 2, and the first resistor R1 does not have a function of storing electric energy, so that the second conversion power supply 2 can be powered down synchronously with the first conversion power supply 1, and a state that the difference value between the first voltage and the second voltage is not smaller than a set threshold value is avoided.
Therefore, through the arrangement of the first resistor R1 and the voltage dividing module 21, the voltage division of the first voltage is realized, the second voltage is ensured to stably reach the power supply voltage of the second conversion power supply 2, meanwhile, a resistive path is formed through the first resistor R1, the storage problem of electric energy is avoided, the second conversion power supply 2 can synchronously power up and power down with the first conversion power supply 1, the difference value between the first voltage and the second voltage can be smaller than a set threshold value in any time, the damage to loads is avoided, and the stability of a power supply circuit is effectively improved.
It should be noted that the specific type of the processor system may be set according to actual needs, which is not limited.
The disclosed embodiments also provide a vehicle including a processor system as the disclosed embodiments.
It can be understood that, when the first switching power supply 1 is powered up, since the first switching power supply 1 supplies power to the second switching power supply 2, and the first resistor R1 does not have a function of storing electric energy, the second switching power supply 2 can be powered up synchronously with the first switching power supply 1, and meanwhile, during the power-up process, since the power voltage of the second switching power supply 2 is smaller than the power voltage of the first switching power supply 1, when both the first voltage and the second voltage reach the power voltage of the second switching power supply 2, the second voltage does not rise any more, and the first voltage continues to rise until reaching the power voltage of the first switching power supply 1, so that the time for the second voltage to rise to the power voltage of the second switching power supply 2 is earlier than the time for the first voltage to rise to the power voltage of the first switching power supply 1, thereby avoiding a state that the difference between the first voltage and the second voltage is not smaller than the set threshold.
When the first conversion power supply 1 is powered down, the first conversion power supply 1 supplies power to the second conversion power supply 2, and the first resistor R1 does not have a function of storing electric energy, so that the second conversion power supply 2 can be powered down synchronously with the first conversion power supply 1, and a state that the difference value between the first voltage and the second voltage is not smaller than a set threshold value is avoided.
Therefore, through the arrangement of the first resistor R1 and the voltage dividing module 21, the voltage division of the first voltage is realized, the second voltage is ensured to stably reach the power supply voltage of the second conversion power supply 2, meanwhile, a resistive path is formed through the first resistor R1, the storage problem of electric energy is avoided, the second conversion power supply 2 can synchronously power up and power down with the first conversion power supply 1, the difference value between the first voltage and the second voltage can be smaller than a set threshold value in any time, the damage to loads is avoided, and the stability of a power supply circuit is effectively improved.
It should be noted that the specific type of the vehicle may be set according to actual needs, and this is not a limitation, and the vehicle may be a fuel vehicle, an electric vehicle, or the like, for example.
Relational terms such as "first" and "second", and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Claims (10)

1. A power supply circuit, comprising:
the output end of the first conversion power supply outputs a first voltage;
the input end of the second conversion power supply is connected with the output end of the first conversion power supply, the output end of the second conversion power supply outputs second voltage which changes in the same direction with the first voltage, and the difference value between the first voltage and the second voltage is smaller than a set threshold value.
2. The power supply circuit of claim 1, wherein the second switching power supply comprises:
the first end of the first resistor is connected with the output end of the first conversion power supply;
the first end of the voltage division module is connected with the second end of the first resistor, and the second end of the voltage division module is grounded;
the second end of the first resistor outputs the second voltage, and the power supply voltage of the second conversion power supply is smaller than that of the first conversion power supply.
3. The power supply circuit of claim 2, wherein the voltage dividing module comprises:
the triode is NPN, the collector electrode of the triode is connected with the second end of the first resistor, and the emitter electrode of the triode is grounded;
and the first end of the control unit is connected with the collector electrode of the triode, and the second end of the control unit is connected with the base electrode of the triode.
4. A power supply circuit according to claim 3, wherein the control unit comprises:
the output end of the operational amplifier is connected with the base electrode of the triode;
the first end of the reference voltage component is connected with the collector electrode of the triode, and the second end of the reference voltage component is connected with the inverting input end of the operational amplifier;
and the first end of the voltage feedback component is connected with the first end of the reference voltage component, and the second end of the voltage feedback component is connected with the non-inverting input end of the operational amplifier.
5. The power supply circuit of claim 4, wherein the reference voltage component comprises:
the first end of the second resistor is connected with the collector electrode of the triode, and the second end of the second resistor is connected with the inverting input end of the operational amplifier;
the cathode of the voltage stabilizing diode is connected with the second end of the second resistor, the anode of the voltage stabilizing diode is grounded, and the reverse breakdown voltage of the voltage stabilizing diode is smaller than the power supply voltage of the first conversion power supply.
6. The power supply circuit of claim 4, wherein the voltage feedback component comprises:
the first end of the third resistor is connected with the first end of the reference voltage component, and the second end of the third resistor is connected with the non-inverting input end of the operational amplifier;
and 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 grounded.
7. The power supply circuit of claim 6, wherein the voltage feedback assembly further comprises:
the first end of the first capacitor is connected with the first end of the reference voltage component, the first end of the third resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the second end of the third resistor.
8. The power supply circuit of claim 2, wherein the second switching power supply further comprises:
and the first end of the second capacitor is connected with the first end of the voltage dividing module, and the second end of the second capacitor is grounded.
9. A processor system, comprising: the power supply circuit of any one of claims 1-8.
10. A vehicle, characterized by comprising: the processor system of claim 9.
CN202320277241.5U 2023-02-20 2023-02-20 Power supply circuit, processor system and vehicle Active CN219436864U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320277241.5U CN219436864U (en) 2023-02-20 2023-02-20 Power supply circuit, processor system and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320277241.5U CN219436864U (en) 2023-02-20 2023-02-20 Power supply circuit, processor system and vehicle

Publications (1)

Publication Number Publication Date
CN219436864U true CN219436864U (en) 2023-07-28

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