CN219875131U - Power supply circuit and second pulse output system - Google Patents
Power supply circuit and second pulse output system Download PDFInfo
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- CN219875131U CN219875131U CN202320629296.8U CN202320629296U CN219875131U CN 219875131 U CN219875131 U CN 219875131U CN 202320629296 U CN202320629296 U CN 202320629296U CN 219875131 U CN219875131 U CN 219875131U
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Abstract
The utility model provides a power supply circuit and a second pulse output system, and relates to the technical field of power supplies. The power supply circuit comprises an MCU, a power supply module, a boosting module and a voltage stabilizing module, wherein the boosting module is electrically connected with the MCU, the power supply module and the voltage stabilizing module respectively; the power supply module is used for providing power; the boosting module is used for boosting the power supply voltage according to the driving signal of the MCU; the voltage stabilizing module is used for stabilizing the voltage output by the voltage boosting module. The power supply circuit and the second pulse output system provided by the utility model have the advantages of more flexible power supply mode and lower cost.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a power supply circuit and a pulse per second output system.
Background
Pbox is commonly referred to in the automotive field as a combined positioning system, which is generally composed of a GNSS (Global Navigation Satellite System ), an IMU (Inertial Measurement Unit, inertial measurement unit) and a computing chip, where global positioning is achieved by receiving satellite signals by the GNSS, calibration is achieved by the IMU, and positioning capability of a certain time accuracy is continued to be maintained when the GNSS signals are lost.
Most of Pbox in the market at present outputs positioning data through CAN and Ethernet, and time synchronization inaccuracy is caused by data link transmission delay, which CAN bring some difficulties to the overall real-time control of automatic driving. In order to make up for the shortage of time synchronization, pbox can increase one second pulse signal output as a synchronization signal to the whole vehicle control as synchronization time.
The Pbox equipment with the second pulse output on the market generally adopts a storage battery power supply or a fixed voltage power supply as a power supply scheme, but has the problem that the power supply mode is inflexible.
Disclosure of Invention
The utility model aims to provide a power supply circuit and a pulse per second output system, which are used for solving the problem that the power supply mode in the prior art is inflexible.
In order to achieve the above object, the technical scheme adopted by the embodiment of the utility model is as follows:
in a first aspect, an embodiment of the present utility model provides a power supply circuit, where the power supply circuit includes an MCU, a power supply module, a boost module, and a voltage stabilizing module, where the boost module is electrically connected to the MCU, the power supply module, and the voltage stabilizing module, respectively; wherein,,
the power supply module is used for providing power;
the boosting module is used for boosting the power supply voltage according to the driving signal of the MCU;
the voltage stabilizing module is used for stabilizing the voltage output by the boosting module.
Optionally, the power supply module includes a power supply and a filter capacitor, the output end of the power supply is electrically connected with one end of the filter capacitor and the boost module respectively, and the other end of the filter capacitor is grounded.
Optionally, the boost module includes switch tube, inductance, first bleeder subassembly and boost diode, MCU pass through first bleeder subassembly with the control end electricity of switch tube is connected, the first end of switch tube respectively with the one end of inductance boost diode's positive pole electricity is connected, the other end of inductance with the power module electricity is connected, boost diode's negative pole with voltage stabilizing module electricity is connected, the second ground connection of switch tube.
Optionally, the first voltage dividing component includes a first resistor and a second resistor, one end of the first resistor is electrically connected with the MCU after being connected in series with the second resistor, the other end of the first resistor is grounded, and the control end of the switching tube is connected between the first resistor and the second resistor.
Optionally, the switching tube includes an NMOS tube, a gate of the switching tube is electrically connected to the first voltage dividing component, a source of the switching tube is grounded, and a drain of the switching tube is electrically connected to one end of the inductor and an anode of the boost diode respectively.
Optionally, the voltage stabilizing module includes a third resistor and a voltage stabilizing diode, one end of the third resistor is electrically connected with the voltage boosting module, the other end of the third resistor is electrically connected with the cathode and the output end of the voltage stabilizing diode respectively, and the anode of the voltage stabilizing diode is grounded.
Optionally, the voltage stabilizing module further includes a filtering component, one end of the filtering component is electrically connected with the third resistor, and the other end of the filtering component is grounded.
Optionally, the power supply circuit further includes a feedback module, the feedback module includes a second voltage division component, the second voltage division component is electrically connected with the output end of the MCU and the voltage stabilizing module, and the second voltage division component is further grounded.
Optionally, the feedback module further includes an RC component, and the MCU is electrically connected to the second voltage division component through the RC component.
On the other hand, the embodiment of the utility model also provides a second pulse output system, which comprises a second pulse driving circuit and the power supply circuit, wherein the output end of the voltage stabilizing module is electrically connected with the second pulse driving circuit, and the MCU is also electrically connected with the second pulse driving circuit.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a power supply circuit and a second pulse output system, wherein the power supply circuit comprises an MCU, a power supply module, a boosting module and a voltage stabilizing module, and the boosting module is respectively and electrically connected with the MCU, the power supply module and the voltage stabilizing module; the power supply module is used for providing power; the boosting module is used for boosting the power supply voltage according to the driving signal of the MCU; the voltage stabilizing module is used for stabilizing the voltage output by the voltage boosting module. On one hand, the utility model can enable the boosting module to boost according to the driving signal of the MCU by arranging the MCU and the boosting module, and the boosted voltage value can be different under the condition that the MCU outputs different PWM signals, so that the power supply mode is more flexible. On the other hand, the utility model reduces the product cost by setting a relatively simple module to realize the mode of providing power for the second pulse driving circuit.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a module connection of a pulse-per-second driving circuit in the prior art.
Fig. 2 is a schematic diagram of another module connection of a pulse-per-second driving circuit in the prior art.
Fig. 3 is a schematic block diagram of a power supply circuit according to an embodiment of the present utility model.
Fig. 4 is a schematic circuit diagram of a power supply circuit according to an embodiment of the present utility model.
Fig. 5 is a schematic block diagram of a second pulse output system according to an embodiment of the present utility model.
In the figure:
100-a power supply circuit; 110-MCU; 120-a power supply module; 130-a boost module; 140-a voltage stabilizing module; 150-a feedback module; a 200-second pulse output system; a 210-second pulse driving circuit; r1-a first resistor; r2-a second resistor; r3-a third resistor; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; c1-a first capacitance; c2-a second capacitance; a C3-third capacitor; c4-fourth capacitance; c5-fifth capacitance; c6-sixth capacitance; m1-a switching tube; l-inductance; d1-a boost diode; d3-zener diode.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
It is noted that relational terms such as first and second, and the like are 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.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
As described in the background art, in order to make up for the shortage of time synchronization, pbox may increase a pulse per second signal output as a synchronization signal to the whole vehicle control as a synchronization time, and on hardware, pbox may increase a pulse per second driving circuit, for power supply of the pulse per second driving circuit, there are currently two general modes:
first, referring to fig. 1, the second pulse driving circuit is connected to a storage battery, and the storage battery provides power for the second pulse driving circuit, and the second pulse driving circuit outputs a second pulse signal under the driving of the MCU. For the circuit structure, the connection mode is relatively simple, but the voltage of the storage battery can change, so that the level of the output second pulse signal follows the change of the storage battery, misjudgment at the receiving equipment is easy to cause, and finally, synchronization failure is caused. For example, the voltage of the storage battery is 5V, and under normal output, the level of the pulse per second signal is also 5V; however, in the power supply process of the storage battery, the power supply voltage of the storage battery may change, for example, the power supply voltage of the storage battery becomes 4V, the level of the generated second pulse signal is also 4V, and the receiving device at the rear end may misjudge, for example, whether the signal at the moment is the second pulse signal or not cannot be identified, so that synchronization is invalid.
Second, referring to fig. 2, the power supply of the pulse per second driving circuit is connected to the post-Pbox internal voltage stabilizing chip or the post-boost chip to fix the voltage. The output second pulse signal level is constant, and has strong anti-interference performance, but the voltage output is fixed, and the internal parameters of the whole hardware can only be adjusted in face of different voltage output demands of clients, so that the hardware differentiation is larger, and when a boost chip is adopted, the cost of the product is increased. For example, when the output voltage of the voltage stabilizing chip in fig. 2 is 3.3V, the level of the second pulse signal is also 3.3V; at this time, if the level of the second pulse signal required at the receiving apparatus side is 5V, the circuit structure inside Pbox needs to be replaced, for example, the voltage stabilizing chip needs to be replaced, so that the operation is relatively complex and the cost is increased.
Therefore, in the prior art, when the pulse per second driving circuit is powered, the problems of unstable power supply and low flexibility exist.
In view of this, the present utility model provides a power supply circuit, which improves the flexibility of power supply by providing a discrete module.
The power supply circuit provided by the utility model is exemplified below:
referring to fig. 3, as an implementation manner, the power supply circuit 100 includes an MCU110, a power supply module 120, a boost module 130, and a voltage stabilizing module 140, where the boost module 130 is electrically connected to the MCU110, the power supply module 120, and the voltage stabilizing module 140, respectively; the power supply module 120 is configured to provide power, the boost module 130 is configured to boost a power voltage according to a driving signal of the MCU110, and the voltage stabilizing module 140 is configured to stabilize a voltage output by the boost module 130.
The power supply circuit 100 provided by the utility model can be applied to Pbox, because the resources of the MCU110 in Pbox are rich, and the MCU110 in Pbox and PWM and ADC resources inside the MCU110 are utilized, and meanwhile, the current required by pulse is very small, and the current is generally controlled within 20mA, so that the power consumption is relatively low, and the overall cost is relatively low.
In the present utility model, the MCU110 may provide the PWM signal to the boost module 130, and determine the voltage boosted by the boost module 130 according to the PWM signal. After the boost module 130 boosts the voltage, the voltage stabilizing function of the voltage stabilizing module 140 provides a stable power supply of the target voltage for the receiving device of the subsequent stage.
As an implementation manner, referring to fig. 4, the power supply module 120 includes a power source and a filter capacitor, wherein an output end of the power source is electrically connected to one end of the filter capacitor and the boost module 130, and the other end of the filter capacitor is grounded. The power module may be an external power source, and may supply power to the boost module 130 after stabilizing the voltage. Of course, the power module may also supply power to the MCU110, which is not limited herein.
In addition, the number of the filter capacitors is not limited, for example, in fig. 4, the filter capacitors in the power supply module 120 include a first capacitor C1 and a second capacitor C2, one end of the first capacitor C1 and one end of the second capacitor C2 are connected in parallel and then connected to a power supply, the other end of the first capacitor C1 and the second capacitor C2 are grounded, and the booster module 130 provides a stable input of the power supply.
The boost module 130 includes a switch tube M1, an inductor L, a first voltage dividing component, and a boost diode D1, the MCU110 is electrically connected to a control end of the switch tube M1 through the first voltage dividing component, a first end of the switch tube M1 is electrically connected to one end of the inductor L and an anode of the boost diode D1, another end of the inductor L is electrically connected to the power supply module 120, a cathode of the boost diode D1 is electrically connected to the voltage stabilizing module 140, and a second end of the switch tube M1 is grounded.
It should be noted that, the inductance L is an energy storage inductance L, and when the switching tube M1 is turned on, the power supply module 120, the inductance L, and the switching tube M1 form a loop, and the energy storage inductance L is charged at this time; when the switching tube M1 is turned off, the power supply module 120, the inductor L and the boost diode D1 are turned on, and the power supply module 120 and the inductor L supply power to the receiving device at the rear end through the boost diode D1, so as to achieve the boosting effect. In addition, the MCU110 outputs PWM signals with different duty ratios, so as to regulate the on and off speed of the switching tube M1, and further regulate the voltage output by the boost module 130.
The type of the switching tube M1 is not limited, for example, the switching tube M1 may be a triode, a MOS tube, or an N-type or a P-type switching tube M1. Taking the switching tube M1 as an NMOS tube for illustration, the gate of the switching tube M1 is electrically connected to the first voltage dividing component, the source of the switching tube M1 is grounded, and the drain of the switching tube M1 is electrically connected to one end of the inductor L and the anode of the boost diode D1, respectively.
As an implementation manner, the first voltage dividing component includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 and one end of the second resistor R2 are connected in series, and then are electrically connected with the MCU110, the other end of the first resistor R1 and the other end of the second resistor R2 are grounded, and a control end of the switch tube M1 is connected between the first resistor R1 and the second resistor R2.
By the voltage division action of the first resistor R1 and the second resistor R2, a suitable driving voltage can be provided for the gate of the switching tube M1, for example, a driving voltage of 3.3V or 5V is provided for the gate of the switching tube M1.
The voltage stabilizing module 140 includes a third resistor R3 and a voltage stabilizing diode D3, one end of a fourth resistor R4 is electrically connected to the voltage boosting module 130, the other end of the fourth resistor R4 is electrically connected to the cathode and the output end of the voltage stabilizing diode D3, and the anode of the voltage stabilizing diode D3 is grounded.
It can be understood that the third resistor R3 and the zener diode D3 may form a voltage limiting circuit, so as to further perform voltage limiting protection. For example, the zener diode D3 may be a 12V zener diode D3, and when the voltage output by the boost module 130 is less than 12V, the voltage stabilizing module 140 is used to normally supply power to the receiving device of the subsequent stage; when the voltage output by the boost module 130 is greater than 12V, the zener diode D3 will stabilize the voltage at 12V, which plays a role in overvoltage protection, preventing the receiving device at the subsequent stage from malfunctioning.
In addition, in order to make the output voltage more stable, the voltage stabilizing module 140 further includes a filter component, where one end of the filter component is electrically connected to the fourth resistor R4 and the other end is grounded. As shown in fig. 4, the filter assembly provided by the present utility model may include a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5, where the third capacitor C3 and the fourth capacitor C4 are connected to one end of the third resistor R3, and the fifth capacitor C5 is connected to the other end of the third resistor R3.
In order to achieve better output voltage judgment effect, as an implementation manner, the power supply circuit 100 further includes a feedback module 150, where the feedback module 150 includes a second voltage division component, and the second voltage division component is electrically connected to the output ends of the MCU110 and the voltage stabilizing module 140, and the second voltage division component is further grounded.
The output voltage Vout can be sampled through the second voltage dividing component, the sampled value is fed back to the MCU110, and if the sampled value is abnormal at the moment, the MCU110 can adjust the duty ratio of the output PWM, so that the output voltage is regulated and controlled.
The second voltage dividing component includes a fourth resistor R4 and a fifth resistor R5, one end of the fourth resistor R4 and the fifth resistor R5 connected in series is electrically connected to the output end of the voltage stabilizing module 140, the other end is grounded, and the MCU110 is connected between the fourth resistor R4 and the fifth resistor R5. The MCU110 is provided with an ADC sampling pin, and the sampling pin may be connected to the second voltage dividing component.
The feedback module 150 further includes an RC component through which the MCU110 is electrically connected to the second voltage divider component. The RC component comprises a sixth resistor R6 and a sixth capacitor C6, and the sixth resistor R6 and the sixth capacitor C6 form an RC filter component.
Based on the above implementation, referring to fig. 5, the embodiment of the present utility model further provides a second pulse output system 200, where the second pulse output system 200 includes a second pulse driving circuit 210 and the above power supply circuit 100, the output end of the voltage stabilizing module 140 is electrically connected to the second pulse driving circuit 210, and the MCU110 is also electrically connected to the second pulse driving circuit 210.
In summary, the present utility model provides a power supply circuit and a pulse per second output system, where the power supply circuit includes an MCU, a power supply module, a boost module and a voltage stabilizing module, and the boost module is electrically connected with the MCU, the power supply module and the voltage stabilizing module respectively; the power supply module is used for providing power; the boosting module is used for boosting the power supply voltage according to the driving signal of the MCU; the voltage stabilizing module is used for stabilizing the voltage output by the voltage boosting module. On one hand, the utility model can enable the boosting module to boost according to the driving signal of the MCU by arranging the MCU and the boosting module, and the boosted voltage value can be different under the condition that the MCU outputs different PWM signals, so that the power supply mode is more flexible. On the other hand, the utility model reduces the product cost by setting a relatively simple module to realize the mode of providing power for the second pulse driving circuit.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The power supply circuit is characterized by comprising an MCU, a power supply module, a boosting module and a voltage stabilizing module, wherein the boosting module is electrically connected with the MCU, the power supply module and the voltage stabilizing module respectively; wherein,,
the power supply module is used for providing power;
the boosting module is used for boosting the power supply voltage according to the driving signal of the MCU;
the voltage stabilizing module is used for stabilizing the voltage output by the boosting module; wherein,,
the boost module comprises a switch tube, an inductor, a first voltage dividing component and a boost diode, wherein the MCU is electrically connected with a control end of the switch tube through the first voltage dividing component, a first end of the switch tube is respectively electrically connected with one end of the inductor and an anode of the boost diode, the other end of the inductor is electrically connected with the power supply module, a cathode of the boost diode is electrically connected with the voltage stabilizing module, and a second end of the switch tube is grounded.
2. The power supply circuit according to claim 1, wherein the power supply module comprises a power supply and a filter capacitor, the output end of the power supply is electrically connected with one end of the filter capacitor and the boost module respectively, and the other end of the filter capacitor is grounded.
3. The power supply circuit according to claim 1, wherein the first voltage dividing component comprises a first resistor and a second resistor, one end of the first resistor is electrically connected with the MCU after being connected in series with the second resistor, the other end of the first resistor is grounded, and the control end of the switching tube is connected between the first resistor and the second resistor.
4. The power supply circuit of claim 1, wherein the switching tube comprises an NMOS tube, a gate of the switching tube is electrically connected to the first voltage dividing component, a source of the switching tube is grounded, and a drain of the switching tube is electrically connected to one end of the inductor and an anode of the boost diode, respectively.
5. The power supply circuit of claim 1, wherein the voltage stabilizing module comprises a third resistor and a voltage stabilizing diode, one end of the third resistor is electrically connected with the voltage boosting module, the other end of the third resistor is electrically connected with a cathode and an output end of the voltage stabilizing diode respectively, and an anode of the voltage stabilizing diode is grounded.
6. The power supply circuit of claim 5, wherein the voltage stabilizing module further comprises a filter assembly, one end of the filter assembly is electrically connected to the third resistor, and the other end of the filter assembly is grounded.
7. The power supply circuit of claim 1, further comprising a feedback module, wherein the feedback module comprises a second voltage divider assembly, wherein the second voltage divider assembly is electrically connected to the MCU and the output of the voltage regulator module, respectively, and wherein the second voltage divider assembly is further grounded.
8. The power supply circuit of claim 7, wherein the feedback module further comprises an RC component, the MCU being electrically connected to the second voltage divider component through the RC component.
9. A pulse per second output system, characterized in that the pulse per second output system comprises a pulse per second drive circuit and a power supply circuit according to any one of claims 1-8, the output end of the voltage stabilizing module is electrically connected with the pulse per second drive circuit, and the MCU is also electrically connected with the pulse per second drive circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320629296.8U CN219875131U (en) | 2023-03-24 | 2023-03-24 | Power supply circuit and second pulse output system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320629296.8U CN219875131U (en) | 2023-03-24 | 2023-03-24 | Power supply circuit and second pulse output system |
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