CN217087513U - DC power supply device - Google Patents
DC power supply device Download PDFInfo
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- CN217087513U CN217087513U CN202220200400.7U CN202220200400U CN217087513U CN 217087513 U CN217087513 U CN 217087513U CN 202220200400 U CN202220200400 U CN 202220200400U CN 217087513 U CN217087513 U CN 217087513U
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Abstract
The application discloses DC power supply device, including difference fortune amplifier module and current output module, difference fortune amplifier module will direct current bus converts differential voltage into, with the current output module that module output is connected is put to difference fortune, be used for with differential voltage converts the electric current into, does the load power supply is applicable to the great load of power. The problem that the voltage output circuit cannot be suitable for a load with large power is solved, and the circuit is more stable.
Description
Technical Field
The utility model relates to a power supply field especially relates to a DC power supply device.
Background
In the prior art, a voltage output circuit is often adopted to convert the voltage output by the direct current bus and output the converted voltage to a load, but the voltage output by the voltage output circuit is only suitable for a load with low power, and the stable work cannot be carried out on the load with high power.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a DC power supply device has solved the unable problem that is applicable to the great load of power of voltage output circuit for the power supply is more stable.
In order to solve the above technical problem, the present application provides a dc power supply device, including differential operational amplifier module and current output module:
the differential operational amplifier module is connected with the output end of the direct current bus and is used for converting the direct current bus into differential voltage;
and the current output module is connected with the output end of the differential operational amplifier module and is used for converting the differential voltage into current to supply power to the load.
Preferably, the differential operational amplifier module comprises a first resistance module, a second resistance module, a first operational amplifier, a first resistance and a second resistance;
the first end of the first resistance module is connected with the output negative end of the direct current bus, and the second end of the first resistance module is connected with the positive phase input end of the first operational amplifier;
the first end of the second resistance module is connected with the positive output end of the direct current bus, and the second end of the second resistance module is connected with the inverting input end of the first operational amplifier;
a first end of the first resistor is connected with a non-inverting input end of the first operational amplifier, and a second end of the first resistor is used as an output positive end of the differential operational amplifier module;
the first end of the second resistor is connected with the inverting input end of the first operational amplifier, and the second end of the second resistor is used as the output negative end of the differential operational amplifier module;
the resistance values of the first resistance module and the second resistance module are equal;
the first resistor and the second resistor are equal in resistance value.
Preferably, the differential operational amplifier module further comprises a first capacitor and a second capacitor;
the first capacitor is connected with the first resistor in parallel, and the second capacitor is connected with the second resistor in parallel;
the first capacitor and the second capacitor are used for filtering the voltage output by the direct current bus.
Preferably, the LED further comprises a first diode and a second diode;
the cathode of the first diode is respectively connected with the second end of the first resistor module, the anode of the second diode and the positive-phase input end of the first operational amplifier; the anode of the first diode is connected with the second end of the second resistance module, the cathode of the second diode and the inverting input end of the first operational amplifier respectively;
the first diode and the second diode are used for limiting the voltage difference between the non-inverting input end and the inverting input end of the first operational amplifier within the conducting voltage of the first diode and the second diode.
Preferably, the current output module includes a third resistor, a fourth resistor and a second operational amplifier;
the first end of the third resistor is connected with the positive output end of the differential operational amplifier module, and the second end of the third resistor is connected with the inverting input end of the second operational amplifier, and the connected common end serves as the output end of the current output module;
a first end of the fourth resistor is connected with the negative output end of the differential operational amplifier module, and a second end of the fourth resistor is connected with the positive input end of the second operational amplifier;
the third resistor and the fourth resistor are equal in resistance value.
Preferably, the current output module further includes a first controllable switch, a voltage regulator tube and a fifth resistor;
the output end of the second operational amplifier is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the anode of the voltage regulator tube, and the connected common end is connected with the control end of the first controllable switch; a first end of the first controllable switch is connected with a non-inverting input end of the second operational amplifier, and a second end of the first controllable switch is used as an output end of the current output module; the cathode of the voltage stabilizing tube is connected with the positive output end of the differential operational amplifier module;
the first controllable switch is used for being conducted when the pressure difference between the output positive end of the differential operational amplifier module and the output negative end of the differential operational amplifier module is smaller than a threshold value.
Preferably, the device further comprises a voltage output module;
the input end of the voltage output module is connected with the output end of the differential operational amplifier module and is used for converting the differential voltage output by the differential operational amplifier module and then outputting the voltage to the load.
Preferably, the voltage output module includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a third operational amplifier;
the sixth resistor is connected between the output negative terminal of the differential operational amplifier module and the inverting input terminal of the third operational amplifier, and the seventh resistor is connected between the output positive terminal of the differential operational amplifier module and the non-inverting input terminal of the third operational amplifier;
a first end of the eighth resistor is connected with an inverting input end of the third operational amplifier, and a second end of the eighth resistor is used as an output positive end of the voltage output module;
a first end of the ninth resistor is connected with a positive phase input end of the third operational amplifier, and a second end of the ninth resistor is used as an output negative end of the voltage output module;
the sixth resistor and the seventh resistor have the same resistance value, and the eighth resistor and the ninth resistor have the same resistance value.
Preferably, the system further comprises a second controllable switch, a third controllable switch and a conversion module;
the second controllable switch is arranged between the output end of the current output module and the load, and the control end of the second controllable switch is connected with the conversion module;
the third controllable switch is arranged between the output end of the voltage output module and the load, and the control end of the third controllable switch is connected with the conversion module;
the conversion module is used for controlling the conduction of the second controllable switch to control the current output module to supply power to the load or controlling the conduction of the third controllable switch to control the voltage output module to supply power to the load.
Preferably, the first controllable switch is a PMOS transistor;
and the source electrode of the PMOS tube is used as the first end of the first controllable switch, the drain electrode of the PMOS tube is used as the second end of the first controllable switch, and the grid electrode of the PMOS tube is used as the control end of the first controllable switch.
The application provides a direct current supply device, including difference fortune put module and current output module, difference fortune is put the module and will direct current bus converts differential voltage into, with the current output module that module output end is connected is put to difference fortune, be used for with differential voltage converts the electric current into, does the load power supply is applicable to the great load of power. The problem that a voltage output circuit cannot be suitable for a load with large power is solved, and power supply is more stable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the prior art and the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dc power supply apparatus provided in the present application;
fig. 2 is a schematic structural diagram of a differential amplifier module provided in the present application;
fig. 3 is a schematic structural diagram of a current output module provided in the present application;
fig. 4 is a schematic structural diagram of another dc power supply apparatus provided in the present application;
fig. 5 is a schematic structural diagram of a voltage output module provided in the present application.
Detailed Description
The core of the utility model is to provide a DC supply device, solved the unable problem that is applicable to the great load of power of voltage output circuit for the power supply is more stable.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a dc power supply device provided in the present application, including a differential operational amplifier module 1 and a current output module 2:
the differential operational amplifier module 1 is connected with the output end of the direct current bus and is used for converting the direct current bus into differential voltage;
and the current output module 2 is connected with the output end of the differential operational amplifier module 1 and is used for converting the differential voltage into current and supplying power to a load.
In the prior art, a voltage output circuit converts a voltage output by a direct current bus and outputs the converted voltage to a load, and the voltage output by the voltage output circuit is only suitable for a load with low power, so that the voltage output by the voltage output circuit cannot stably work for the load with high power.
The application provides a direct current supply device, including difference operational amplifier module 1 and current output module 2, difference operational amplifier module 1 converts the mainstream bus into differential voltage, and differential voltage's interference killing feature is stronger, can reduce the change that appears by a relatively large margin at the in-process of transmission. The current output module 2 converts the differential voltage into current to supply power to the load, and the current can supply power to the load with larger power.
On the basis of the above-described embodiment:
fig. 2 is a schematic structural diagram of a differential amplifier module provided in the present application.
As a preferred embodiment, the differential operational amplifier module 1 includes a first resistance module 11, a second resistance module 12, a first operational amplifier U1, a first resistor R1, and a second resistor R2;
a first end of the first resistance module 11 is connected with the negative output end of the direct current bus, and a second end of the first resistance module 11 is connected with the positive input end of the first operational amplifier U1;
a first end of the second resistance module 12 is connected with the positive output end of the direct current bus, and a second end of the second resistance module 12 is connected with the inverting input end of the first operational amplifier U1;
a first end of the first resistor R1 is connected to a non-inverting input end of the first operational amplifier U1, and a second end of the first resistor R1 serves as an output positive end of the differential operational amplifier module 1;
a first end of the second resistor R2 is connected to the inverting input end of the first operational amplifier U1, and a second end of the second resistor R2 is used as the output negative end of the differential operational amplifier module 1;
the resistance values of the first resistance module 11 and the second resistance module 12 are equal;
the first resistor R1 and the second resistor R2 have the same resistance.
The first resistor module 11, the second resistor module 12, the first operational amplifier U1, the first resistor R1, and the second resistor R2 together form the differential operational amplifier module 1, an output positive terminal of the differential operational amplifier module 1 outputs VP, an output negative terminal of the differential operational amplifier module 1 outputs VN, and VP and VN form a differential voltage. The first operational amplifier U1 processes the dc bus voltage according to the resistances of the first resistor module 11, the second resistor module 12, and the first resistor R1 and the second resistor R2.
Specifically, when the resistances of the first resistor R1 and the second resistor R2 are both X, and the first resistor module 11 and the second resistor module 12 are both four resistors with the resistance of Y connected in series. VP is greater than VN, and VP-VN is X/(4 × Y) × ((U +) - (U-)), and the relationship between the differential voltage and the dc bus voltage can be adjusted according to the values of X and Y, which is not limited herein.
The values of X and Y are adjusted according to needs, voltage boosting or voltage reducing processing of the voltage output by the direct current bus is achieved, and the method is more convenient.
As a preferred embodiment, the differential operational amplifier module 1 further includes a first capacitor C1 and a second capacitor C2;
the first capacitor C1 is connected in parallel with the first resistor R1, and the second capacitor C2 is connected in parallel with the second resistor R2;
the first capacitor C1 and the second capacitor C2 are used for filtering the voltage output by the dc bus.
Considering that there is ripple in the voltage output by the dc bus, the differential voltage output by the differential operational amplifier module 1 is inaccurate. The first capacitor C1 and the second capacitor C2 are arranged and are respectively connected with the first resistor R1 and the second resistor R2 in parallel, so that ripples are filtered, and the differential voltage output by the differential operational amplifier module 1 is more stable.
As a preferred embodiment, the device further comprises a first diode D1 and a second diode D2;
the cathode of the first diode D1 is connected to the second end of the first resistor module 11, the anode of the second diode D2, and the non-inverting input terminal of the first operational amplifier U1, respectively; the anode of the first diode D1 is connected to the second end of the second resistor module 12, the cathode of the second diode D2, and the inverting input terminal of the first operational amplifier U1;
the first diode D1 and the second diode D2 are used to limit the voltage difference between the non-inverting input terminal and the inverting input terminal of the first operational amplifier U1 within the turn-on voltages of the first diode D1 and the second diode D2.
Considering that the difference between the voltage values input to the non-inverting input terminal and the inverting input terminal of the first operational amplifier U1 cannot be excessively large, a first diode D1 and a second diode D2 are provided in anti-parallel. Specifically, U-is connected to the inverting input of the first operational amplifier U1 through the second diode D2, and U + is connected to the non-inverting input of the first operational amplifier U1 through the first diode D1.
The voltage difference between the non-inverting input end and the inverting input end of the first operational amplifier U1 is limited within the conducting voltage of the first diode D1 and the second diode D2, and the first operational amplifier U1 is protected.
Fig. 3 is a schematic structural diagram of a current output module provided in the present application.
As a preferred embodiment, the current output module 2 includes a third resistor R3, a fourth resistor R4, and a second operational amplifier U2;
a first end of the third resistor R3 is connected with the positive output end of the differential operational amplifier module 1, a second end of the third resistor R3 is connected with the inverting input end of the second operational amplifier U2, and the connected common end serves as the output end of the current output module 2;
a first end of the fourth resistor R4 is connected to the negative output terminal of the differential operational amplifier module 1, and a second end of the fourth resistor R4 is connected to the non-inverting input terminal of the second operational amplifier U2;
the third resistor R3 and the fourth resistor R4 have the same resistance.
The resistance values of the third resistor R3 and the fourth resistor R4 are Z. The inverting input of the second operational amplifier U2 is connected to VP and the non-inverting input is connected to VN. Since the second operational amplifier U2 implements the virtual short function, the voltage at the non-inverting input terminal and the input voltage at the inverting input terminal are VN. The current flowing through the third resistor R3 is I ═ VP-VN)/Z, that is, the magnitude of the current output by the current output module 2 is I ═ VP-VN)/Z.
The differential voltage is converted into current output through the second operational amplifier U2, and the current output circuit is suitable for loads with larger power.
As a preferred embodiment, the current output module 2 further includes a first controllable switch 21, a voltage regulator D3 and a fifth resistor R5;
the output end of the second operational amplifier U2 is connected with the first end of a fifth resistor R5, the second end of the fifth resistor R5 is connected with the anode of a voltage regulator tube D3, and the connected common end is connected with the control end of the first controllable switch 21; a first end of the first controllable switch 21 is connected with a non-inverting input end of the second operational amplifier U2, and a second end of the first controllable switch 21 is used as an output end of the current output module 2; the cathode of the voltage-stabilizing tube D3 is connected with the output positive end of the differential operational amplifier module 1;
the first controllable switch 21 is configured to be turned on when a voltage difference between the positive output terminal of the differential operational amplifier module 1 and the negative output terminal of the differential operational amplifier module 1 is smaller than a threshold value.
Considering that the voltage of the dc bus is larger, the voltage passing through the differential operational amplifier module 1 is also larger, which causes the current output by the current output module 2 to be larger, and damages the load. A first controllable switch 21 is provided, the maximum voltage of the control terminal of the first controllable switch 21 can reach VP, the voltage of the first terminal of the first controllable switch 21 is VN, and the conduction condition of the first controllable switch 21 is VP-VN smaller than the threshold. The voltage of the control terminal of the first controllable switch 21 ranges from the regulated value of the VP-regulator D3 to VP.
The first controllable switch 21 protects the load, and is turned off when the differential voltage is too large, so that an excessive current is prevented from being input to the load.
Fig. 4 is a schematic structural diagram of another dc power supply apparatus provided in the present application.
As a preferred embodiment, the device further comprises a voltage output module 3;
the input end of the voltage output module 3 is connected with the output end of the differential operational amplifier module 1, and is used for converting the differential voltage output by the differential operational amplifier module 1 and outputting the voltage to a load.
The voltage output by the voltage output module 3 can be matched with a load with smaller power, so that the voltage output module 3 is arranged, and after the differential voltage is converted, the output voltage supplies power to the load.
Fig. 5 is a schematic structural diagram of a voltage output module provided in the present application.
As a preferred embodiment, the voltage output module 3 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a third operational amplifier U3;
the sixth resistor R6 is connected between the negative output terminal of the differential operational amplifier module 1 and the inverting input terminal of the third operational amplifier U3, and the seventh resistor R7 is connected between the positive output terminal of the differential operational amplifier module 1 and the non-inverting input terminal of the third operational amplifier U3;
a first end of the eighth resistor R8 is connected to the inverting input terminal of the third operational amplifier U3, and a second end of the eighth resistor R8 is used as the output positive terminal of the voltage output module 3;
a first end of the ninth resistor R9 is connected to the non-inverting input terminal of the third operational amplifier U3, and a second end of the ninth resistor R9 is used as the output negative terminal of the voltage output module 3;
the sixth resistor R6 and the seventh resistor R7 have the same resistance, and the eighth resistor R8 and the ninth resistor R9 have the same resistance.
The resistances of the sixth resistor R6 and the seventh resistor R7 are L, the resistances of the eighth resistor R8 and the ninth resistor R9 are M, the positive output terminal of the voltage conversion module is U +, and the negative output terminal is the power ground V-. The voltage value of U + with respect to the power ground is the output voltage value of the voltage output module 3, and U1- (V-) (VP-VN) × M/L.
The conversion of differential voltage is realized by adjusting the values of M and L, the function of boosting or reducing voltage is realized, and power is supplied to a load.
As a preferred embodiment, the device further comprises a second controllable switch, a third controllable switch and a conversion module;
the second controllable switch is arranged between the output end of the current output module 2 and the load, and the control end of the second controllable switch is connected with the conversion module;
the third controllable switch is arranged between the output end of the voltage output module 3 and the load, and the control end of the third controllable switch is connected with the conversion module;
the conversion module is used for controlling the conduction of the second controllable switch to control the conduction of the current output module 2 to supply power to the load or controlling the conduction of the third controllable switch to control the conduction of the voltage output module 3 to supply power to the load.
Considering that the voltage output module 3 and the current output module 2 do not work simultaneously, a second controllable switch is arranged between the output end of the current output module 2 and the load, and a third controllable switch is arranged between the output end of the voltage output module 3 and the load. The conversion module controls the current output module 2 or the voltage output module 3 to supply power to the load by controlling the conduction or the closing of the second controllable switch and the third controllable switch.
In addition, the conversion module can be manually controlled according to the load power, and a load detection device can be arranged to detect the load power and judge whether to use the current output module 2 or the voltage output module 3 according to whether the power exceeds a threshold value. When the power exceeds the threshold value, the load is judged to be a load with larger power, the current output module 2 is used for supplying power to the load, when the power does not exceed the threshold value, the load is judged to be a load with smaller power, the voltage output module 3 is used for supplying power to the load, and excessive limitation is not performed.
In a preferred embodiment, the first controllable switch 21 is a PMOS transistor;
the source electrode of the PMOS tube is used as the first end of the first controllable switch, the drain electrode of the PMOS tube is used as the second end of the first controllable switch, and the grid electrode of the PMOS tube is used as the control end of the first controllable switch.
The PMOS tube has large load capacity, is suitable for power with larger current, has simple connection relation and is easy to integrate.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The direct current power supply device is characterized by comprising a differential operational amplifier module and a current output module:
the differential operational amplifier module is connected with the output end of the direct current bus and is used for converting the direct current bus into differential voltage;
and the current output module is connected with the output end of the differential operational amplifier module and is used for converting the differential voltage into current to supply power to a load.
2. The dc power supply apparatus of claim 1, wherein the differential operational amplifier module comprises a first resistor module, a second resistor module, a first operational amplifier, a first resistor, and a second resistor;
the first end of the first resistance module is connected with the output negative end of the direct current bus, and the second end of the first resistance module is connected with the positive phase input end of the first operational amplifier;
the first end of the second resistance module is connected with the positive output end of the direct current bus, and the second end of the second resistance module is connected with the inverting input end of the first operational amplifier;
a first end of the first resistor is connected with a non-inverting input end of the first operational amplifier, and a second end of the first resistor is used as an output positive end of the differential operational amplifier module;
the first end of the second resistor is connected with the inverting input end of the first operational amplifier, and the second end of the second resistor is used as the output negative end of the differential operational amplifier module;
the resistance values of the first resistance module and the second resistance module are equal;
the first resistor and the second resistor are equal in resistance value.
3. The dc power supply apparatus of claim 2, wherein the differential operational amplifier module further comprises a first capacitor and a second capacitor;
the first capacitor is connected with the first resistor in parallel, and the second capacitor is connected with the second resistor in parallel;
the first capacitor and the second capacitor are used for filtering the voltage output by the direct current bus.
4. The dc power supply apparatus according to claim 2, further comprising a first diode and a second diode;
the cathode of the first diode is respectively connected with the second end of the first resistor module, the anode of the second diode and the positive-phase input end of the first operational amplifier; the anode of the first diode is connected with the second end of the second resistance module, the cathode of the second diode and the inverting input end of the first operational amplifier respectively;
the first diode and the second diode are used for limiting the voltage difference between the non-inverting input end and the inverting input end of the first operational amplifier within the conducting voltage of the first diode and the second diode.
5. The dc power supply apparatus of claim 1, wherein the current output module comprises a third resistor, a fourth resistor, and a second operational amplifier;
the first end of the third resistor is connected with the positive output end of the differential operational amplifier module, and the second end of the third resistor is connected with the inverting input end of the second operational amplifier, and the connected common end serves as the output end of the current output module;
a first end of the fourth resistor is connected with the output negative end of the differential operational amplifier module, and a second end of the fourth resistor is connected with the positive phase input end of the second operational amplifier;
the third resistor and the fourth resistor are equal in resistance value.
6. The DC power supply device according to claim 5, wherein the current output module further comprises a first controllable switch, a voltage regulator tube and a fifth resistor;
the output end of the second operational amplifier is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the anode of the voltage regulator tube, and the connected common end is connected with the control end of the first controllable switch; a first end of the first controllable switch is connected with a non-inverting input end of the second operational amplifier, and a second end of the first controllable switch is used as an output end of the current output module; the cathode of the voltage stabilizing tube is connected with the positive output end of the differential operational amplifier module;
the first controllable switch is used for being conducted when the voltage difference between the positive output end of the differential operational amplifier module and the negative output end of the differential operational amplifier module is smaller than a threshold value.
7. The direct-current power supply device according to any one of claims 1 to 6, further comprising a voltage output module;
the input end of the voltage output module is connected with the output end of the differential operational amplifier module and is used for converting the differential voltage output by the differential operational amplifier module and then outputting the voltage to the load.
8. The dc power supply apparatus of claim 7, wherein the voltage output module comprises a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a third operational amplifier;
the sixth resistor is connected between the output negative terminal of the differential operational amplifier module and the inverting input terminal of the third operational amplifier, and the seventh resistor is connected between the output positive terminal of the differential operational amplifier module and the non-inverting input terminal of the third operational amplifier;
a first end of the eighth resistor is connected with an inverting input end of the third operational amplifier, and a second end of the eighth resistor is used as an output positive end of the voltage output module;
a first end of the ninth resistor is connected with a positive phase input end of the third operational amplifier, and a second end of the ninth resistor is used as an output negative end of the voltage output module;
the sixth resistor and the seventh resistor have the same resistance value, and the eighth resistor and the ninth resistor have the same resistance value.
9. The dc power supply apparatus according to claim 7, further comprising a second controllable switch, a third controllable switch, and a conversion module;
the second controllable switch is arranged between the output end of the current output module and the load, and the control end of the second controllable switch is connected with the conversion module;
the third controllable switch is arranged between the output end of the voltage output module and the load, and the control end of the third controllable switch is connected with the conversion module;
the conversion module is used for controlling the conduction of the second controllable switch to control the current output module to supply power to the load or controlling the conduction of the third controllable switch to control the voltage output module to supply power to the load.
10. The DC power supply of claim 6, wherein the first controllable switch is a PMOS transistor;
the source electrode of the PMOS tube is used as the first end of the first controllable switch, the drain electrode of the PMOS tube is used as the second end of the first controllable switch, and the grid electrode of the PMOS tube is used as the control end of the first controllable switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220200400.7U CN217087513U (en) | 2022-01-25 | 2022-01-25 | DC power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220200400.7U CN217087513U (en) | 2022-01-25 | 2022-01-25 | DC power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217087513U true CN217087513U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220200400.7U Active CN217087513U (en) | 2022-01-25 | 2022-01-25 | DC power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217087513U (en) |
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2022
- 2022-01-25 CN CN202220200400.7U patent/CN217087513U/en active Active
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