CN218449556U - Power supply grading control circuit - Google Patents
Power supply grading control circuit Download PDFInfo
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- CN218449556U CN218449556U CN202222523748.2U CN202222523748U CN218449556U CN 218449556 U CN218449556 U CN 218449556U CN 202222523748 U CN202222523748 U CN 202222523748U CN 218449556 U CN218449556 U CN 218449556U
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Abstract
The application relates to a power supply hierarchical control circuit, it includes power multistage step-down circuit and power supply control circuit, and power multistage step-down circuit includes power incoming end and a plurality of power output end, the power incoming end is used for receiving external voltage, power output end is coupled with the components and parts that correspond for export corresponding supply voltage and give the components and parts that correspond. The power supply control circuit comprises a plurality of control interface ends and is used for controlling the electrifying voltage of each component, the control interface ends are coupled with the corresponding components, and the power supply control circuit is connected with the power output end of the power supply multistage voltage reduction circuit. This application has the characteristics that can reduce a plurality of electronic component power control's cost when power control, reaches reduce cost and the later maintenance's of being convenient for effect.
Description
Technical Field
The application relates to the field of power supply circuits, in particular to a power supply hierarchical control circuit.
Background
When the electronic equipment or the electronic components work, a power supply is needed, the voltage values needed by different electronic equipment or components are often different, and the voltage value ranges capable of being borne are also different, so that different electronic equipment or components need to be respectively supplied with power.
For electronic elements in the same system, in order to meet the requirements of different power supply voltages, a power supply is generally required to be independently configured to supply power, so that the requirement of normal work of each electronic element is met.
In view of the above-mentioned related art, the inventor considers that it is costly to separately configure separate power supplies for power supply and control, and that post-maintenance is difficult, which is to be further improved.
SUMMERY OF THE UTILITY MODEL
In order to reduce the cost that a plurality of electronic components dispose the power respectively and carry out power supply control, reduce the degree of difficulty of later maintenance simultaneously, this application provides a power hierarchical control circuit.
The application provides a hierarchical control circuit of power adopts following technical scheme:
the utility model provides a power supply classification control circuit, includes power supply multistage step-down circuit and power supply control circuit, and power supply multistage step-down circuit includes power access end and a plurality of power output end, the power access end is used for receiving external voltage, power output end is coupled with the components and parts that correspond for export corresponding supply voltage and give the components and parts that correspond.
The power supply control circuit comprises a plurality of control interface ends and is used for controlling the electrifying voltage of each component, the control interface ends are coupled with the corresponding components, and the power supply control circuit is connected with the power output end of the power supply multistage voltage reduction circuit.
Through adopting above-mentioned technical scheme, set up the multistage step-down circuit of power, direct follow an initial power supply and drop to required voltage and provide different mains voltage for various components and parts to carry out centralized control through the power supply control circuit to the power of each components and parts, practice thrift the cost, be convenient for equipment and maintenance.
Optionally, the multistage step-down circuit of power includes one-level step-down circuit, one-level step-down circuit adopts the step-down switch type dust collection voltage stabilization chip U1 and peripheral circuit that the model is LM 2596.
By adopting the technical scheme, a first-stage voltage reduction circuit is arranged, and the LM2596 series is a 3A current output voltage reduction switch type integrated voltage stabilization chip which comprises a fixed frequency oscillator and a reference voltage stabilizer and is provided with various perfect protection circuits;
therefore, a high-efficiency voltage stabilizing circuit can be formed by adopting fewer peripheral circuit devices, the volume of the whole control circuit is reduced, and the cost is saved; and the first-stage voltage reduction circuit can be connected with the power output end and the next-stage voltage reduction circuit more stably, and the voltage of the output end is more stable.
Optionally, the power supply multistage voltage reduction circuit further includes a second-stage voltage reduction circuit, and the second-stage voltage reduction circuit adopts a first voltage reduction chip U2 with the model of MP1482 and a peripheral circuit thereof.
By adopting the technical scheme, the MP1482 is a current mode single-chip voltage reduction switch voltage stabilizer, the internal synchronous power switch provides high efficiency, the voltage stabilizer works at low frequency, high efficiency and low output ripple waves are kept, the voltage stabilization efficiency of the whole power supply grading control circuit can be improved, and the output voltage is more stable; robustness is ensured through short-circuit protection, thermal protection, starting current out-of-control protection and input undervoltage locking, and the voltage reduction efficiency is high and stable; in addition, compact structure, the external component is little, reduces and occupies the position, makes whole control circuit's volume reduce, reduce cost.
Optionally, the power supply control circuit adopts a single chip microcomputer U3 with the model of STC15w404 s.
Through adopting above-mentioned technical scheme, the chip of STC15w404s model, erasable number of times is more than 10 ten thousand to in time change or increase control mode and parameter, the interference killing feature is strong, the security performance is bold, can also prevent outside electromagnetic radiation function, and then can improve whole control circuit's interference immunity and life.
Optionally, the power supply hierarchical control circuit includes a power on/off control circuit including a first resistor R1, a triode Q0, a first MOS transistor Q1, a second resistor R2, and a first seat J1 for connecting components, where the first MOS transistor Q1 is a PMOS transistor. One end of the first resistor R1 is connected with the singlechip U3, and the other end of the first resistor R1 is connected with a collector of the triode Q0; the base electrode of the triode Q0 is connected with one end of the second resistor R2 and the grid electrode of the first MOS tube Q1, and the emitting electrode of the triode Q0 is grounded; the drain electrode of the first MOS tube Q1 is connected with one end of the first seat J1, and the source electrode of the first MOS tube Q1 is connected with the other end of the second resistor R2 and the power output end of the power multistage voltage reduction circuit; the other end of the first seat J1 is grounded.
Through adopting above-mentioned technical scheme, come the break-make of control MOS pipe through the triode to the break-make of the components and parts on first seat J1 is installed in the control, cooperates other components and parts whole to work simultaneously, and the components and parts that use still less, and the break-make electric control is more stable, is difficult to damage components and parts, realizes the independent control to the components and parts of installing on first seat J1.
Optionally, the power supply hierarchical control circuit includes a voltage regulation circuit including a digital-to-analog conversion chip U4, a first capacitor C1, a second MOS transistor Q2, a second capacitor C2, a third resistor R3, and a second seat J2 for connecting a component, where the second MOS transistor Q2 is an NMOS transistor.
The digital-to-analog conversion chip U4 is connected with the singlechip U3, one pin of the digital-to-analog conversion chip U4 is grounded, the digital-to-analog conversion chip U4 is connected with one end of the third resistor R3, the digital-to-analog conversion chip U4 is connected with the grid electrode of the second MOS tube Q2, and the digital-to-analog conversion chip U4 is respectively connected with one end of the first capacitor C1 and the power output end of the power multistage voltage reduction circuit; the source electrode of the second MOS tube Q2 is grounded, and the drain electrode of the second MOS tube Q2 is connected with one end of a second capacitor C2 and one end of a second seat J2; the other end of the second seat J2 is connected with a power supply output end of the power supply multistage voltage reduction circuit; the other end of the second capacitor C2 is grounded; the other end of the third resistor R3 is connected with the power output end of the power multistage voltage reduction circuit; the other end of the first capacitor C1 is grounded.
A third capacitor C3, a fourth resistor R4 and a fourth capacitor C4 are further connected between the digital-to-analog conversion chip U4 and the third resistor R3, and the other ends of the third capacitor C3, the fourth resistor R4 and the fourth capacitor C4 are all grounded.
By adopting the technical scheme, the digital-to-analog conversion chip U4 is arranged to convert the output digital signal into the analog signal, and the voltage regulation and on-off control of the components mounted on the second seat J2 are realized through the peripheral circuit of the single chip U3.
Optionally, the power supply hierarchical control circuit includes a protection circuit, where the protection circuit includes a third socket J3 for connecting to a power supply, a first diode D1, a second diode D2, a fifth capacitor C5, a fifth resistor R5, a third MOS transistor Q3, a sixth capacitor C6, and a seventh capacitor C7;
the third seat J3 is provided with 3 ports, one port of the third seat is connected with the anode of the first diode D1, and the other two ports are connected with the ground; the cathode of the first diode D1 is connected with one end of a fifth capacitor C5, the cathode of the second diode D2 and a third MOS tube Q3, the third MOS tube Q3 is connected with the anode of the second diode D2, the other end of the fifth capacitor C5 and one end of a fifth resistor R5, and the third MOS tube Q3 is connected with the power supply access end of the output end power supply multistage circuit; the other end of the fifth resistor R5 is grounded.
By adopting the technical scheme, the protection circuit is arranged, so that the functions of overvoltage protection and reverse connection prevention can be achieved, and the control circuit can be better protected.
Optionally, the power classification control circuit further includes a key circuit, where the key circuit includes an ec11 encoder for inputting an adjustment signal to the power supply control circuit.
Through adopting above-mentioned technical scheme, set up the keying circuit including ec11 encoder, can be with control signal input to during singlechip U3 to control the operating condition of components and parts.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the power supply control circuit and the power supply multistage voltage reduction circuit, various components with different power supply requirements can be met, the working states of various components are controlled independently, the components are controlled in a centralized manner, the cost is saved, and the assembly and the later maintenance are facilitated;
2. through setting up break-make control circuit and voltage control circuit, can not only realize the independent control of components and parts, can also reach the effect of the high-efficient work of circuit under the control demand condition that satisfies components and parts, make the circuit full play control action, and practice thrift the cost, improve economic benefits.
Drawings
Fig. 1 is a schematic structural diagram of a one-stage voltage-reducing circuit in the embodiment of the present application.
Fig. 2 is a schematic structural diagram of a two-stage voltage-reducing circuit in the embodiment of the present application.
Fig. 3 is a schematic diagram of a circuit structure of the single chip microcomputer U3 in the embodiment of the present application.
Fig. 4 is a schematic structural diagram of a power on/off control circuit in the embodiment of the present application.
Fig. 5 is a schematic diagram of a voltage regulating circuit according to an embodiment of the present application.
Fig. 6 is a schematic diagram of a key circuit structure according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a protection circuit according to an embodiment of the present application.
Description of reference numerals:
20. a power on and off control circuit; 21. a voltage regulation circuit; 3. a first-stage voltage reduction circuit; 4. a secondary voltage reduction circuit; 5. a protection circuit; 6. and a key circuit.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
The embodiment of the application discloses a power supply hierarchical control circuit.
Example 1:
referring to fig. 1, the power supply gradation control circuit includes a power supply multistage voltage step-down circuit and a power supply control circuit (refer to fig. 3). The power supply control circuit comprises a plurality of control interface ends, and the control interface ends are coupled with the components; the power supply grading control circuit comprises a power supply access end and a plurality of power supply output ends, the power supply access end is coupled with a power supply, and the power supply output ends are coupled with the power supply voltage ends of the corresponding components.
In this embodiment, taking the case that the power supply control circuit includes two control interface terminals as an example, the electronic component in the system includes two components with power supply voltages of 12V and 5V, respectively, and the power supply classification control circuit is provided with two power supply output terminals; in other embodiments, the electronic components in the system may further include three, four, and so on multiple components, and correspond to the control interface terminals of the multiple power supply control circuits and the power output terminals of the multiple power supply hierarchical control circuits.
In this embodiment, the multistage step-down circuit of power includes one-level step-down circuit 3 and second grade step-down circuit 4, and 19V's safe voltage source is selected to the power, and one-level step-down circuit 3 falls to 12V with the voltage source, and second grade step-down circuit 4 falls to 5V with 12V to can be simultaneously for two supply voltage respectively for 12V and 5V's components and parts power supply, reduce the quantity of power, practice thrift the cost.
In other embodiments, for example, when the number of components and devices with different power supply requirements is greater than 2, the first-stage voltage-reducing circuit 3 reduces the power supply voltage to the power supply requirement voltage corresponding to the component with the highest power supply requirement voltage, and then the second-stage voltage-reducing circuit 4 reduces the power supply requirement voltage corresponding to the component with the highest power supply requirement voltage to the corresponding power supply requirement voltage step by step, so as to complete the graded power supply of the components and devices with different power supply requirements.
Referring to fig. 1 and 2, in the present embodiment, the one-stage voltage-reducing circuit 3 may employ a voltage-reducing switch type dust-collecting voltage-stabilizing chip U1 of model LM2596 and its peripheral circuits. The second-stage voltage-reducing circuit 4 can adopt a first voltage-reducing chip U2 with the model of MP1482 and peripheral circuits thereof, so that the reduced voltage can be more efficient, stable and safe.
Referring to fig. 3, 4 and 5, in order to meet the effects of centralized and efficient control of components and cost saving, the power supply control circuit comprises a single chip microcomputer U3 with the model of STC15w404s, a power on/off control circuit 20 and a voltage regulating circuit 21. The power on/off control circuit 20 is mainly used for controlling the power on/off of components; the voltage regulating circuit 21 is mainly used for controlling the on-off of components and other performances, and when the components are LEDs, the brightness of the LEDs can be regulated by regulating the voltages at two ends of the LEDs, so that the components can be controlled independently and efficiently.
Referring to fig. 4, the power on/off control circuit 20 includes a first resistor R1, a triode Q0, a first MOS transistor Q1, a second resistor R2, and a first socket J1 for connecting components.
One end of a first resistor R1 is connected with a pin 28 of the U chip, and the other end of the first resistor R1 is connected with a collector of the triode Q0; the base electrode of the triode Q0 is connected with one end of the second resistor R2 and the grid electrode of the first MOS tube Q1, and the emitting electrode of the triode Q0 is grounded; the drain electrode of the first MOS tube Q1 is connected with one end of the first seat J1, and the source electrode of the first MOS tube Q1 is connected with the other end of the second resistor R2 and the power output end of the power multistage voltage reduction circuit; the other end of the first seat J1 is grounded.
The triode Q0 is of an NPN type, the first MOS tube Q1 is a PMOS tube, and under the default condition, the grid electrode of the first MOS tube Q1 is 12V voltage; at the moment, vgs =0, the first MOS transistor Q1 is in a cut-off state, J1 is not electrified, and a component connected to the J1 is disconnected from a power supply;
when the singlechip U3 gives a high-level signal to the triode Q0, the triode Q0 is in a conducting state, and the grid electrode of the first MOS transistor Q1 is grounded; at this time, vgs = -12V of the first MOS transistor Q1, the first MOS transistor Q1 is in a conduction state, so that J1 is energized, and a component connected to J1 and the power supply are in a conduction state;
on the contrary, when the singlechip U3 gives a low-level signal to the triode Q0, the triode Q0 is in a cut-off state; at this time, the gate of the first MOS transistor Q1 is pulled to the 12V power supply again by R2, and the first MOS transistor Q1 returns to the off state. Therefore, the on-off of the components mounted on the J1 can be controlled through the high-point level signal of the single chip microcomputer U3, and the control method is simple and convenient, high in efficiency and low in cost.
Referring to fig. 5, the voltage regulating circuit includes a digital-to-analog conversion chip U4, a first capacitor C1, a second MOS transistor Q2, a second capacitor C2, a third resistor R3, and a second seat J2 for connecting components, and the digital-to-analog conversion chip U4 may adopt a TLC5615 chip.
the source electrode of the second MOS tube Q2 is grounded, and the drain electrode of the second MOS tube Q2 is connected with one end of a second capacitor C2 and one end of a second seat J2; the other end of the second seat J2 is connected with a power supply output end of the power supply multistage voltage reduction circuit; the other end of the second capacitor C2 is grounded; the other end of the third resistor R3 is connected with the power output end of the power multistage voltage reduction circuit; the other end of the first capacitor C1 is grounded;
a third capacitor C3, a fourth resistor R4 and a fourth capacitor C4 are further connected between the pin 6 of the digital-to-analog conversion chip U4 and the third resistor R3, and the other ends of the third capacitor C3, the fourth resistor R4 and the fourth capacitor C4 are all grounded.
The singlechip U3 transmits a control signal to the digital-to-analog conversion chip U4 to convert the type of the control signal, then controls the conduction quantity of the second MOS tube Q2 through the converted signal, controls the voltage of the output end of the second MOS tube Q2, adjusts the voltage of the second seat J2, and realizes the voltage electrodeless control of the components and parts installed on the J2.
Referring to fig. 6, in this embodiment, the power supply classification control circuit further includes a key circuit 6, where the key circuit 6 is composed of an ec11 encoder and a peripheral circuit, and is capable of inputting an adjustment signal to the single chip microcomputer U3 in the power supply control circuit, so as to provide a control signal for the single chip microcomputer U3, and implement centralized control of components.
The implementation principle of the power supply hierarchical control circuit in the embodiment of the application is as follows: the primary voltage reduction circuit 3 and the secondary voltage reduction circuit 4 reduce the power supply to 12V and 5V, so that power can be supplied to the single chip microcomputer U3, the power-on and power-off control circuit 20, the voltage regulation circuit 21 and the key circuit 6.
People input a demand signal into the singlechip U3 through the key circuit 6, and the demand signal is converted into a control signal and output to the power-on and power-off control circuit 20 or the voltage regulating circuit 21; the on-off control circuit 20 controls the on-off of the first seat J1 according to the control signal, so as to control the on-off of components mounted on the first seat J1; and voltage regulating circuit 21 controls the break-make and both ends voltage of second seat J2 according to control signal to the break-make and both ends voltage of the components and parts of second seat J2 are installed in the control, from this, can realize adopting unified power and solitary control mode to carry out the independent control to two kinds of components and parts through power multistage step-down circuit and power supply control circuit, improved the efficiency and the integrated level of circuit, practice thrift the cost, obtain higher economic benefits.
Example 2:
referring to fig. 7, the present embodiment is different from embodiment 1 in that the present embodiment further includes a protection circuit 5, and the protection circuit 5 includes a third socket J3, a first diode D1, a second diode D2, a fifth capacitor C5, a fifth resistor R5, and a third MOS transistor Q3. The third seat J3 is used for connecting a power supply, and in this embodiment, the third MOS transistor Q3 may be of the type LSP52.
The implementation principle of the power supply hierarchical control circuit in the embodiment of the application is as follows: the power supply is transmitted to the first-stage voltage reduction circuit 3 through the protection circuit 5, the condition that the circuit is damaged due to reverse connection of voltage can be reduced, so that the reverse connection prevention effect can be achieved, the load can better protect the whole circuit when overvoltage occurs, and loss is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (6)
1. A kind of power supply classification control circuit, characterized by that: comprises that
The power supply multistage voltage reduction circuit comprises a power supply access end and a plurality of power supply output ends, wherein the power supply access end is used for receiving external voltage, and the power supply output ends are coupled with corresponding components and used for outputting corresponding power supply voltage to the corresponding components and parts;
the power supply control circuit comprises a plurality of control interface ends and is used for controlling the electrifying voltage of each component, the control interface ends are coupled with the corresponding components, and the power supply control circuit is connected with the power supply output end of the power supply multistage voltage reduction circuit;
the power supply multistage voltage reduction circuit comprises a first-stage voltage reduction circuit (3), wherein the first-stage voltage reduction circuit (3) adopts a voltage reduction switch type dust collection and voltage stabilization chip U1 with the model number of LM2596 and a peripheral circuit thereof;
the power supply control circuit adopts a singlechip U3 with the model of STC15w404 s.
2. The power classification control circuit of claim 1, characterized in that: the power supply multistage voltage reduction circuit further comprises a second-stage voltage reduction circuit (4), wherein the second-stage voltage reduction circuit (4) adopts a first voltage reduction chip U2 with the model of MP1482 and a peripheral circuit thereof.
3. The power classification control circuit of claim 1, characterized in that: the power-on and power-off control circuit comprises a first resistor R1, a triode Q0, a first MOS (metal oxide semiconductor) tube Q1, a second resistor R2 and a power-on and power-off control circuit (20) of a first base J1 for connecting components, wherein the first MOS tube Q1 is a PMOS (P-channel metal oxide semiconductor) tube;
one end of the first resistor R1 is connected with the singlechip U3, and the other end of the first resistor R1 is connected with a collector of the triode Q0; the base electrode of the triode Q0 is connected with one end of the second resistor R2 and the grid electrode of the first MOS tube Q1, and the emitting electrode of the triode Q0 is grounded; the drain electrode of the first MOS tube Q1 is connected with one end of the first seat J1, and the source electrode of the first MOS tube Q1 is connected with the other end of the second resistor R2 and the power output end of the power multistage voltage reduction circuit; the other end of the first seat J1 is grounded.
4. The power classification control circuit of claim 1, characterized in that: the voltage regulation circuit comprises a digital-to-analog conversion chip U4, a first capacitor C1, a second MOS tube Q2, a second capacitor C2, a third resistor R3 and a voltage regulation circuit (21) of a second seat J2 for connecting components, wherein the second MOS tube Q2 is an NMOS tube;
the digital-to-analog conversion chip U4 is connected with the singlechip U3, one pin of the digital-to-analog conversion chip U4 is grounded, the digital-to-analog conversion chip U4 is connected with one end of the third resistor R3, the digital-to-analog conversion chip U4 is connected with the grid electrode of the second MOS tube Q2, and the digital-to-analog conversion chip U4 is respectively connected with one end of the first capacitor C1 and the power output end of the power multistage voltage reduction circuit; the source electrode of the second MOS tube Q2 is grounded, and the drain electrode of the second MOS tube Q2 is connected with one end of a second capacitor C2 and one end of a second seat J2; the other end of the second seat J2 is connected with a power supply output end of the power supply multistage voltage reduction circuit; the other end of the second capacitor C2 is grounded; the other end of the third resistor R3 is connected with the power output end of the power multistage voltage reduction circuit; the other end of the first capacitor C1 is grounded;
a third capacitor C3, a fourth resistor R4 and a fourth capacitor C4 are further connected between the digital-to-analog conversion chip U4 and the third resistor R3, and the other ends of the third capacitor C3, the fourth resistor R4 and the fourth capacitor C4 are all grounded.
5. The power classification control circuit of claim 1, characterized in that: the protection circuit (5) comprises a third seat J3 for connecting a power supply, a first diode D1, a second diode D2, a fifth capacitor C5, a fifth resistor R5, a third MOS tube Q3, a sixth capacitor C6 and a seventh capacitor C7;
the third seat J3 is provided with 3 ports, one port of the third seat is connected with the anode of the first diode D1, and the other two ports are connected and grounded; the cathode of the first diode D1 is connected with one end of a fifth capacitor C5, the cathode of the second diode D2 and a third MOS tube Q3, the third MOS tube Q3 is connected with the anode of the second diode D2, the other end of the fifth capacitor C5 and one end of a fifth resistor R5, and the third MOS tube Q3 is connected with the power supply access end of the output end power supply multistage circuit; the other end of the fifth resistor R5 is grounded;
one ends of a sixth capacitor C6 and a seventh capacitor C7 are connected between the third MOS tube Q3 and the power supply access end of the output end power supply multi-stage circuit, and the other ends of the sixth capacitor C6 and the seventh capacitor C7 are grounded.
6. The power classification control circuit of claim 1, characterized in that: the power supply circuit also comprises a key circuit (6), wherein the key circuit (6) comprises an ec11 encoder which is used for inputting a regulating signal to the power supply control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222523748.2U CN218449556U (en) | 2022-09-22 | 2022-09-22 | Power supply grading control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222523748.2U CN218449556U (en) | 2022-09-22 | 2022-09-22 | Power supply grading control circuit |
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| CN218449556U true CN218449556U (en) | 2023-02-03 |
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| CN202222523748.2U Active CN218449556U (en) | 2022-09-22 | 2022-09-22 | Power supply grading control circuit |
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