CN218162221U - High-efficiency low-ripple power supply conversion circuit - Google Patents
High-efficiency low-ripple power supply conversion circuit Download PDFInfo
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- CN218162221U CN218162221U CN202220840547.2U CN202220840547U CN218162221U CN 218162221 U CN218162221 U CN 218162221U CN 202220840547 U CN202220840547 U CN 202220840547U CN 218162221 U CN218162221 U CN 218162221U
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Abstract
The utility model discloses a low ripple power supply converting circuit of high efficiency, including DC-DC power converter S1, low dropout regulator block S2, resistance R1, R2, R3, R4, R5, R6, R7, electric capacity C1, C2, C3, C4, C5, C6, C7, C8. The utility model discloses a high-efficient DC-DC power converter carries out the first voltage transformation with the higher input voltage of 6V-42V within range, and the accessible changes the value of resistance R4, R5 and carries out accurate adjustment to output voltage, designs C5, C6 and is decoupling filter electric capacity to filtering low frequency clutter, and the mains voltage after the filtration carries out the steady voltage by low dropout voltage stabilizing block MIC29502, exports after the steady voltage is filtered through C7, C8 decoupling capacitor, and output voltage has the characteristic of ultralow ripple; the output voltage is accurately adjusted by changing the values of the resistors R6 and R7, the voltage difference between the input voltage and the output voltage of the voltage stabilizing block MIC29502 is controlled to be more than 0.4V, and the resistors R4, R5, R6 and R7 can finally realize that the conversion efficiency is more than or equal to 90 percent by selecting proper resistance values.
Description
Technical Field
The utility model relates to a circuit design technical field specifically is a low ripple power supply converting circuit of high efficiency.
Background
With the development of mobile communication technology, solid-state power amplifiers are applied more and more widely in microwave engineering. At present, a gallium nitride power amplifier is generally used in a solid-state power amplifier, and when an input voltage is greater than a supply voltage of the power amplifier, a voltage stabilizing block or a DC-DC module is required to adjust the voltage to a voltage required by the power amplifier, so that a power conversion circuit is in a very important position in the application of the power amplifier. At present, a common power conversion circuit has high ripple or low power efficiency, and cannot be used in an application environment requiring high efficiency and low ripple at the same time. Therefore, it is necessary to provide a new power conversion circuit to solve the above-mentioned drawbacks.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a ripple power supply converting circuit is hanged down to the high efficiency to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a high-efficiency low-ripple power conversion circuit comprises a DC-DC power converter S1, a low-dropout voltage regulator block S2, resistors R1, R2, R3, R4, R5, R6 and R7, capacitors C1, C2, C3, C4, C5, C6, C7 and C8.
Preferably, the capacitors C1 and C2 are connected between the input power Vin and the ground, the capacitors C5 and C6 are connected between the pin 7 of the DC-DC power converter S1 and the ground, the capacitors C7 and C8 are connected between the pin 4 of the low dropout regulator block S2 and the ground, and the pin 3 of the low dropout regulator block S2 is connected to the ground.
Preferably, the capacitors C1 and C2 are both connected to the pin 1 of the DC-DC power converter S1, the pin 1 and the pin 2 of the DC-DC power converter S1 are connected through a resistor R1, the pin 1 and the pin 3 of the DC-DC power converter S1 are connected through a resistor R2, the pin 3 and the pin 4 of the DC-DC power converter S1 are connected through a resistor R3, the pin 4 and the pin 5 of the DC-DC power converter S1 are connected through a capacitor C3, the pin 6 and the pin 7 of the DC-DC power converter S1 are connected in parallel by a capacitor C4 and a resistor R5, the pin 5 of the DC-DC power converter S1 is connected to the capacitor C3, and the pin 4 of the DC-DC power converter S1 is connected to ground.
Preferably, the pin 6 of the DC-DC power converter S1 is connected to the pin 3 of the low dropout regulator block S2 through a resistor R4, and capacitors C5 and C6 are provided between the pin 7 of the DC-DC power converter S1 and the pins 1 and 2 of the low dropout regulator block S2.
Preferably, resistors R6 and R7 are connected between the pin No. 4 and the pin No. 5 of the low-dropout voltage regulator block S2, and capacitors C7 and C8 are connected between the pin No. 4 of the low-dropout voltage regulator block S2 and the ground.
Preferably, the resistance of the resistor R1 is 120K Ω, the resistance of the resistor R2 is 62K Ω, the resistance of the resistor R3 is 6.2K Ω, the resistance of the resistor R4 is 1.2K Ω, the resistance of the resistor R5 is 33K Ω, the resistance of the resistor R6 is 17K Ω, and the resistance of the resistor R7 is 1K Ω.
Preferably, the capacitances of the capacitors C1 and C7, C2, C3, C4, C5, C6 and C8 are 10uF, 1uF, 4700PF, 22000PF, 4700PF, and 0.1uF, respectively.
Preferably, the model of the DC-DC power supply converter S1 is LMZ14203H, and the model of the low dropout regulator S2 is MIC29502.
Compared with the prior art, the beneficial effects of the utility model are that: the high-efficiency low-ripple power supply conversion circuit is designed by adopting discrete devices, a high-efficiency DC-DC power supply converter is adopted to carry out primary voltage conversion on higher input voltage within a range of 6V-42V, and the output voltage can be accurately adjusted by changing values of resistors R4 and R5. In the circuit, C5 and C6 are designed as decoupling filter capacitors to filter low-frequency noise waves, the filtered power supply voltage is stabilized by a low-voltage-difference voltage stabilization block MIC29502, the stabilized voltage is filtered by C7 and C8 decoupling capacitors and then output, and the output voltage has the characteristic of ultra-low ripple waves; the output voltage can be accurately adjusted by changing the values of the resistors R6, R7. The voltage difference between the input voltage and the output voltage of the voltage stabilizing block MIC29502 is controlled to be more than 0.4V, taking the input voltage of 28V and the output voltage of 22.4V as an example, the resistors R4, R5, R6 and R7 can finally realize the conversion efficiency of more than or equal to 90 percent by selecting proper resistance values.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
A high-efficiency low-ripple power conversion circuit is shown in figure 1 and comprises a DC-DC power converter S1, a low-voltage-difference voltage stabilizing block S2, resistors R1, R2, R3, R4, R5, R6, R7, capacitors C1, C2, C3, C4, C5, C6, C7 and C8, wherein discrete devices are adopted for design, the high-efficiency DC-DC power converter is adopted for carrying out first voltage conversion on higher input voltage in a range of 6V-42V, and the output voltage can be accurately adjusted by changing values of the resistors R4 and R5. In the circuit, C5 and C6 are designed as decoupling filter capacitors to filter low-frequency noise waves. The filtered power supply voltage is stabilized by a low-voltage-difference voltage stabilizing block MIC29502, and is output after being filtered by decoupling capacitors C7 and C8 after being stabilized, and the output voltage has the characteristic of ultra-low ripple waves; the output voltage can be accurately adjusted by changing the values of the resistors R6, R7. The voltage difference between the input voltage and the output voltage of the voltage stabilizing block MIC29502 can be controlled to be more than 0.4V, taking 28V of input voltage and 22.4V of output voltage as an example, the resistors R4, R5, R6 and R7 can finally realize that the conversion efficiency is more than or equal to 90% by selecting proper resistance values, and the power supply conversion circuit is applied to power supply of a solid-state power amplifier, has the advantages of high efficiency of a switching power supply circuit and low ripple of a linear power supply circuit, and is simple in circuit structure.
Further, capacitors C1 and C2 are connected between the input power Vin and the ground, capacitors C5 and C6 are connected between the pin 7 of the DC-DC power converter S1 and the ground, capacitors C7 and C8 are connected between the pin 4 of the low dropout regulator block S2 and the ground, and pin 3 of the low dropout regulator block S2 is connected to the ground.
Specifically, the capacitors C1 and C2 are both connected to the pin 1 of the DC-DC power converter S1, the pin 1 and the pin 2 of the DC-DC power converter S1 are connected through the resistor R1, the pin 1 and the pin 3 of the DC-DC power converter S1 are connected through the resistor R2, the pin 3 and the pin 4 of the DC-DC power converter S1 are connected through the resistor R3, the pin 4 and the pin 5 of the DC-DC power converter S1 are connected through the capacitor C3, the pin 6 and the pin 7 of the DC-DC power converter S1 are connected in parallel by the capacitor C4 and the resistor R5, the pin 5 of the DC-DC power converter S1 is connected to the capacitor C3, and the pin 4 of the DC-DC power converter S1 is connected to ground.
In addition, a No. 6 pin of the DC-DC power supply converter S1 is connected with a No. 3 pin of the low dropout voltage regulator block S2 through a resistor R4, capacitors C5 and C6 are arranged between a No. 7 pin of the DC-DC power supply converter S1 and the No. 1 and No. 2 pins of the low dropout voltage regulator block S2, resistors R6 and R7 are connected between the No. 4 pin and the No. 5 pin of the low dropout voltage regulator block S2, and capacitors C7 and C8 are connected between the No. 4 pin of the low dropout voltage regulator block S2 and the ground.
It should be noted that the resistance of the resistor R1 is 120K Ω, the resistance of the resistor R2 is 62K Ω, the resistance of the resistor R3 is 6.2K Ω, the resistance of the resistor R4 is 1.2K Ω, the resistance of the resistor R5 is 33K Ω, the resistance of the resistor R6 is 17K Ω, the resistance of the resistor R7 is 1K Ω, the capacitance of the capacitors C1 and C7 is 10uF, the capacitance of the capacitor C2 is 1uF, the capacitance of the capacitor C3 is 4700PF, the capacitance of the capacitor C4 is 22000PF, the capacitance of the capacitor C5 is 4700PF, the capacitance of the capacitors C6 and C8 is 0.1uf, the model of the DC-DC power converter S1 is LMZ14203H, and the model of the low-voltage-difference voltage regulator block S2 is MIC29502.
C1 and C2 are decoupling filter capacitors of a power supply Vin, C6 and C7 are decoupling filter capacitors of output voltage of a power supply converter S1, and C7 and C8 are decoupling filter capacitors of output voltage Vout of a low-dropout voltage regulator block S2.
The utility model discloses a low ripple power supply converting circuit's of high efficiency theory of operation: firstly, an input power supply voltage Vin is converted into a voltage close to the actual working voltage of a power amplifier by adopting a high-efficiency DC-DC power converter S1, and the working efficiency of the DC-DC power converter is more than or equal to 95 percent; and then the output voltage of the DC-DC power supply conversion circuit is subjected to voltage stabilization by adopting a low dropout regulator, and the voltage required by actual work is output.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A high-efficiency low-ripple power conversion circuit is characterized in that: the low-voltage-difference voltage-stabilizing circuit comprises a DC-DC power converter S1, a low-voltage-difference voltage-stabilizing block S2, resistors R1, R2, R3, R4, R5, R6, R7, capacitors C1 and C2, an input power Vin and the ground, capacitors C5 and C6, a capacitor C1, a capacitor C2, a capacitor C7 and a capacitor C8, a capacitor C4 and a capacitor C8, a pin 3 of the low-voltage-difference voltage-stabilizing block S2 are connected with the ground, the capacitors C1 and C2 are connected with a pin 1 of the DC-DC power converter S1, the pin 1 and the pin 2 of the DC-DC power converter S1 are connected through a resistor R1, the pin 1 and the pin 3 of the DC-DC power converter S1 are connected through a resistor R2, the pin 3 and the pin 4 of the DC-DC power converter S1 are connected through a resistor R3, the pin 4 and the pin 5 of the DC-DC power converter S1 are connected through a capacitor C3, a capacitor C4 and a resistor R5 are connected in parallel between the pin 6 and the pin 7 of the DC-DC power converter S1, the pin 5 of the DC-DC power converter S1 is connected with the capacitor C3, the pin 4 of the DC-DC power converter S1 is connected with the ground, the pin 6 of the DC-DC power converter S1 is connected with the pin 3 of the low-voltage-difference voltage-stabilizing block S2 through a resistor R4, capacitors C5 and C6 are arranged between the pin 7 of the DC-DC power converter S1 and the pins 1 and 2 of the low-voltage-difference voltage-stabilizing block S2, and resistors R6 and R7 and capacitors C7 and C8 are connected between the pin 4 and the pin 5 of the low-voltage-difference voltage-stabilizing block S2.
2. The high efficiency low ripple power conversion circuit of claim 1, wherein: the resistance of the resistor R1 is 120K omega, the resistance of the resistor R2 is 62K omega, the resistance of the resistor R3 is 6.2K omega, the resistance of the resistor R4 is 1.2K omega, the resistance of the resistor R5 is 33K omega, the resistance of the resistor R6 is 17K omega, and the resistance of the resistor R7 is 1K omega.
3. The high efficiency low ripple power conversion circuit of claim 1, wherein: the capacitance values of the capacitors C1 and C7 are 10uF, the capacitance value of the capacitor C2 is 1uF, the capacitance value of the capacitor C3 is 4700PF, the capacitance value of the capacitor C4 is 22000PF, the capacitance value of the capacitor C5 is 4700PF, and the capacitance values of the capacitors C6 and C8 are 0.1uF.
4. The high-efficiency low-ripple power conversion circuit according to claim 1, wherein: the model of the DC-DC power supply converter S1 is LMZ14203H, and the model of the low dropout regulator S2 is MIC29502.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220840547.2U CN218162221U (en) | 2022-04-13 | 2022-04-13 | High-efficiency low-ripple power supply conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220840547.2U CN218162221U (en) | 2022-04-13 | 2022-04-13 | High-efficiency low-ripple power supply conversion circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218162221U true CN218162221U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220840547.2U Active CN218162221U (en) | 2022-04-13 | 2022-04-13 | High-efficiency low-ripple power supply conversion circuit |
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| CN (1) | CN218162221U (en) |
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