CN219678318U - Portable desktop power supply - Google Patents
Portable desktop power supply Download PDFInfo
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- CN219678318U CN219678318U CN202321051685.3U CN202321051685U CN219678318U CN 219678318 U CN219678318 U CN 219678318U CN 202321051685 U CN202321051685 U CN 202321051685U CN 219678318 U CN219678318 U CN 219678318U
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Abstract
The utility model discloses a portable desktop power supply, which comprises an input module, an output module, a SEPIC boosting module, an output filtering module and an output adjusting module, wherein the input module is electrically connected with the SEPIC boosting module, the SEPIC boosting module is electrically connected with the output adjusting module, the output adjusting module is electrically connected with the output filtering module, and the output filtering module is electrically connected with the output module; the SEPIC boosting module is used for allowing the output voltage to be larger than, smaller than or equal to the input voltage; the utility model aims to provide a portable desktop power supply, which improves the input voltage range and the output voltage range of the power supply by arranging a SEPIC boosting module, improves the applicability of the power supply, and has the advantages of small volume, high efficiency and the like.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a portable desktop power supply.
Background
Along with the continuous deep industry and the rapid development of industrial automation technology, mobile terminal technology and informatization technology, modern industrial enterprises gradually move to a fine and intelligent development road. The novel manufacturing industry provides higher requirements for safety, environmental protection, energy conservation and high efficiency of the production process, and meanwhile, various numerical control power electronic conversion devices including a direct current stabilized power supply are applied in a large scale, and the performance quality of the numerical control power electronic conversion devices directly influences the system reliability and the production safety.
Along with the continuous progress and development of the power industry and the electricity utilization level in China, the direct-current stabilized power supply has wide application in the fields of industrial control, consumer electronics, rail transit and aerospace, and has important significance on how to improve the power density, the efficiency and the portability of the power supply.
The existing desktop direct current stabilized voltage power supply has the problems of large volume, low efficiency, small power, insufficient output electric energy quality, single interface and incapability of simultaneously meeting the requirements of voltage boosting and voltage reducing conversion, and has larger limitation in the application field.
Disclosure of Invention
The utility model aims to provide a portable desktop power supply, which improves the input voltage range and the output voltage range of the power supply by arranging a SEPIC boosting module, improves the applicability of the power supply, adopts a modularized design, has high integration level, and has the advantages of small volume, high efficiency and the like.
To achieve the purpose, the utility model adopts the following technical scheme: the portable desktop power supply comprises an input module, an output module, a SEPIC boosting module, an output filtering module and an output adjusting module, wherein the input module is electrically connected with the SEPIC boosting module, the SEPIC boosting module is electrically connected with the output adjusting module, the output adjusting module is electrically connected with the output filtering module, and the output filtering module is electrically connected with the output module; the SEPIC boosting module is used for allowing the output voltage to be larger than, smaller than or equal to the input voltage;
the SEPIC boosting module comprises a polarity capacitor CIN, a capacitor C1, a capacitor C2, a capacitor C4, a capacitor C5, a capacitor C6, a power management chip, an inductor L1, an inductor L2, a diode D1, a diode D2 and a polarity capacitor COUT;
the positive terminal of the polarity capacitor CIN is electrically connected to one terminal of the capacitor C1, the VIN pin of the power management chip and one terminal of the inductor L1, the other terminal of the inductor L1 is electrically connected to the SW pin of the power management chip, one terminal of the capacitor C4, one terminal of the capacitor C5 and one terminal of the capacitor C6, the other terminal of the capacitor C4, the other terminal of the capacitor C5 and the other terminal of the capacitor C6 are electrically connected to the positive terminal of the diode D1, the positive terminal of the diode D2 and one terminal of the inductor L2, the negative terminal of the diode D1 is electrically connected to the negative terminal of the diode D2, the positive terminal of the polarity capacitor COUT and one terminal of the capacitor C2, the negative terminal of the polarity capacitor CIN, the other terminal of the capacitor C1, the GND pin of the power management chip, the other terminal of the inductor L2, the negative terminal of the polarity capacitor COUT and the other terminal of the capacitor C2 are electrically connected to the other terminal of the capacitor C2;
the positive terminal and the negative terminal of the polar capacitor CIN are used as the input terminal of the SEPIC boosting module, and the positive terminal and the negative terminal of the polar capacitor COUT are used as the output terminal of the SEPIC boosting module.
Preferably, the output adjusting module includes a resistor R3 and an adjustable potentiometer R4, one end of the resistor R3 is electrically connected with the FB pin of the power management chip and a certain pin of the adjustable potentiometer R4, another certain pin of the adjustable potentiometer R4 is electrically connected with the negative electrode end of the diode D1, and the other end of the resistor R3 is grounded.
Preferably, the output filter module includes an inductor L3 and a capacitor C3, one end of the inductor L3 is electrically connected with the positive end of the polar capacitor COUT, the other end of the inductor L3 is electrically connected with one end of the capacitor C3 and the output module, and the other end of the capacitor C3 is grounded.
Preferably, the voltage measuring device further comprises a voltage measuring module, wherein the voltage measuring module comprises a three-wire voltmeter and a measuring terminal, the three-wire voltmeter is electrically connected with the measuring terminal, and the measuring terminal is electrically connected with the output module.
Preferably, the input module comprises a first wiring terminal and a typeC quick charge trigger, and the first wiring terminal and the typeC quick charge trigger are electrically connected with the input end of the SEPIC boost module.
Preferably, the output module includes a second connection terminal, and the second connection terminal is electrically connected with the output end of the SEPIC boost module.
Preferably, the SEPIC boosting device further comprises a work indication module, wherein the work indication module comprises a resistor R1 and a diode LED1, and a serial branch of the resistor R1 and the diode LED1 is connected with an input end of the SEPIC boosting module in parallel.
Preferably, the voltage input indicating module further comprises a resistor R2 and a diode LED2, and a series branch of the resistor R2 and the diode LED2 is connected with the output end of the output filtering module in parallel.
The technical scheme of the utility model has the beneficial effects that: the SEPIC boosting module is arranged to reduce input ripple, allow output voltage to be larger than, smaller than or equal to input voltage, keep the same polarity of input/output voltage, meet the requirements of flexible and efficient direct current power conversion, reduce resonance point impedance, improve load capacity, enable a power supply to provide a 5V-35V wide input voltage range and a 1.25V-36V adjustable output voltage range, fix 180KHz switching frequency and enable maximum 5A switching current to be used for desktop test equipment power supply, handheld equipment power supply and common electronic equipment power supply adapters. Compared with the existing common commercial power source, the utility model has the advantages of small volume, high efficiency, high power density and rich interfaces, and can meet the use requirements of various scenes such as communication, manufacture, consumers and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of one embodiment of the present utility model;
FIG. 2 is a schematic diagram illustrating the operation of a first power conversion stage according to one embodiment of the present utility model;
fig. 3 is a schematic diagram illustrating the operation of a first power conversion stage according to an embodiment of the present utility model.
Wherein: the device comprises an input module 1, an output module 2, a SEPIC boosting module 3, an output filtering module 4, an output adjusting module 5, a voltage measuring module 6, a work indicating module 7 and a voltage input indicating module 8.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
Referring to fig. 1, a portable desktop power supply includes an input module 1, an output module 2, a SEPIC boost module 3, an output filter module 4 and an output adjustment module 5, where the input module 1 is electrically connected with the SEPIC boost module 3, the SEPIC boost module 3 is electrically connected with the output adjustment module 5, the output adjustment module 5 is electrically connected with the output filter module 4, and the output filter module 4 is electrically connected with the output module 2; the SEPIC boosting module 3 is used for allowing the output voltage to be larger than, smaller than or equal to the input voltage.
The SEPIC boosting module 3 is arranged, so that input ripple can be reduced, output voltage is allowed to be larger than, smaller than or equal to input voltage, the homopolarity of the input/output voltage is kept, the requirements of flexible and efficient direct current power conversion are met, the impedance of a resonance point is reduced, the load capacity is improved, a power supply can provide a 5V-35V wide input voltage range and a 1.25V-36V adjustable output voltage range, 180KHz switching frequency is fixed, and the maximum 5A switching current can be used for power supply of desktop test equipment, power supply of handheld equipment and power supply adapters of common electronic equipment. Compared with the existing common commercial power source, the utility model has the advantages of small volume, high efficiency, high power density and rich interfaces, and can meet the use requirements of various scenes such as communication, manufacture, consumers and the like.
Preferably, the SEPIC boost module 3 includes a polarity capacitor CIN, a capacitor C1, a capacitor C2, a capacitor C4, a capacitor C5, a capacitor C6, a power management chip, an inductor L1, an inductor L2, a diode D1, a diode D2, and a polarity capacitor COUT;
the positive terminal of the polarity capacitor CIN is electrically connected to one terminal of the capacitor C1, the VIN pin of the power management chip and one terminal of the inductor L1, the other terminal of the inductor L1 is electrically connected to the SW pin of the power management chip, one terminal of the capacitor C4, one terminal of the capacitor C5 and one terminal of the capacitor C6, the other terminal of the capacitor C4, the other terminal of the capacitor C5 and the other terminal of the capacitor C6 are electrically connected to the positive terminal of the diode D1, the positive terminal of the diode D2 and one terminal of the inductor L2, the negative terminal of the diode D1 is electrically connected to the negative terminal of the diode D2, the positive terminal of the polarity capacitor COUT and one terminal of the capacitor C2, the negative terminal of the polarity capacitor CIN, the other terminal of the capacitor C1, the GND pin of the power management chip, the other terminal of the inductor L2, the negative terminal of the polarity capacitor COUT and the other terminal of the capacitor C2 are electrically connected to the other terminal of the capacitor C2;
the positive terminal and the negative terminal of the polar capacitor CIN are used as the input terminal of the SEPIC boosting module 3, and the positive terminal and the negative terminal of the polar capacitor COUT are used as the output terminal of the SEPIC boosting module 3.
The input VIN is connected with the inductor L1 in series, so that the effect of reducing input ripple waves can be achieved, the capacitor C4, the capacitor C5 and the capacitor C6 are connected in parallel, and the impedance of a resonance point can be reduced; the diode D1 and the diode D2 are connected in parallel, and the load carrying capacity can be improved. The SEPIC boosting module 3 can allow the output voltage to be larger than, smaller than or equal to the input voltage through the cooperation of the elements, and the input/output voltage has the same polarity, so that the requirements of flexible and efficient direct current power conversion are met. In the utility model, the power management chip adopts the chip model XL6019.
Preferably, the output adjusting module 5 includes a resistor R3 and an adjustable potentiometer R4, one end of the resistor R3 is electrically connected to the FB pin of the power management chip and a certain pin of the adjustable potentiometer R4, another certain pin of the adjustable potentiometer R4 is electrically connected to the negative terminal of the diode D1, and the other end of the resistor R3 is grounded. The resistor R3 and the adjustable potentiometer R4 are connected in series to play a role in voltage division, and a simple and rapid output voltage regulation mode can be provided.
Specifically, the output filter module 4 includes an inductor L3 and a capacitor C3, one end of the inductor L3 is electrically connected to the positive terminal of the polar capacitor COUT, the other end of the inductor L3 is electrically connected to one end of the capacitor C3 and the output module 2, and the other end of the capacitor C3 is grounded. A passive low-pass filter circuit is formed by the inductor L3 and the capacitor C3, and the power supply output voltage is subjected to filtering treatment, so that the power supply output power quality is improved.
Preferably, the voltage measuring module 6 is further comprised, and the voltage measuring module 6 comprises a three-wire voltmeter and a measuring terminal, wherein the three-wire voltmeter is electrically connected with the measuring terminal, and the measuring terminal is electrically connected with the output module 2. The measuring terminal of the three-wire voltage meter head is connected with the output VOUT in parallel, and is powered by the input VIN, so that additional power supply is not needed, and the three-wire voltage meter head can intuitively and accurately display the output voltage.
Specifically, the input module 1 includes a first connection terminal and a TypeC fast charge trigger, where the first connection terminal and the TypeC fast charge trigger are electrically connected to the input end of the SEPIC boost module 3. The output module 2 comprises a second wiring terminal, and the second wiring terminal is electrically connected with the output end of the SEPIC boosting module 3.
The first binding post is 13.81 mm's 2-Pin terminal, and first binding post and typeC quick charge trigger output are connected with input VIN electricity. The second binding post is 13.81 mm's 2-Pin terminal, and second binding post is connected with output VOUT electricity. By adopting the two input modules, a double-input mode can be supported, and meanwhile, the power supply of the USB Type-C charger commonly used in a consumption scene and the power supply of the positive and negative voltage terminals commonly used in an industrial scene can be met. The first binding post and the TypeC quick charge trigger can be any one of the two input modes, but cannot be used at the same time.
Meanwhile, the SEPIC boosting device further comprises a work indication module, wherein the work indication module 7 comprises a resistor R1 and a diode LED1, and a serial branch of the resistor R1 and the diode LED1 is connected with the input end of the SEPIC boosting module 3 in parallel.
The voltage input indicating module 8 is further included, the voltage input indicating module 8 includes a resistor R2 and a diode LED2, and a series branch of the resistor R2 and the diode LED2 is connected in parallel with an output end of the output filtering module 4.
When the power supply is operating normally, diode LED1 and diode LED2 are lit, indicating that the voltage input and voltage output are in a stable operating state. The resistor R1 and the resistor R2 play a role in current limiting.
The working modes comprise:
two input/output modes:
the first input/output mode: the first connecting terminal is connected with direct current of 5V-35V as input, and the second connecting terminal outputs direct current of 1.25V-36V.
The second input/output mode: the TypeC fast charging trigger is connected with 9V,12V,15V,18V,20V and QC protocol chargers, and the second connecting terminal outputs 1.25V-36V direct current.
An output adjusting mode comprises the following steps:
the knob connected with the adjustable potentiometer R4 is rotated, the resistance value and the voltage drop at two ends of the adjustable potentiometer R4 are changed, the voltage at two ends of the resistor R3, namely the voltage of the FB pin of the power management chip, is changed, the voltage is compared with the built-in voltage level of the power management chip, the duty ratio of the switch is adjusted through a negative feedback mechanism inside the power management chip, and then the output voltage is adjusted.
Two power conversion stages:
the power management chip is internally provided with a negative feedback circuit and a power switch tube, and the switch frequency of the switch tube is fixed. When the built-in switching tube is conducted, the first power conversion stage is adopted; when the built-in switch tube is turned off, the second power conversion stage is realized. The on-duty ratio of the switching tube is controlled by a PWM pulse width modulation method, so that the output voltage is regulated.
As shown in fig. 2, the first power conversion stage: the power management chip is internally provided with a power switch tube which is turned on, a diode D1 and a diode D2 are turned off, and 3 current loops are formed in the SEPIC topology circuit. The VIN input power source charges the inductor L1 and flows through a built-in power switch tube of the power management chip to form a first current loop. The inductance L1 in the first loop stores energy, and the current flowing through the loop increases linearly. The energy storage capacitor formed by the parallel connection of the capacitor C4, the capacitor C5 and the capacitor C6 discharges, and the current flows through the built-in power switch tube of the power management chip and the inductor L2 to form a second current loop. The polar capacitor COUT discharges, and the current flows through the inductor L3 in the filter circuit and supplies power to the load, forming a third current loop.
As shown in fig. 3, the second power conversion stage: the built-in power switch tube of the power management chip is turned off, the diodes D1 and D2 are turned on, and 2 current loops are formed in the SEPIC topology circuit. The first loop inputs current from VIN input power supply, via inductance L1, via energy storage capacitor formed by parallel connection of capacitors C4, C5 and C6, via parallel connection of diodes D1 and D2, and finally via load. The second loop is discharged by the inductor L2, passes through the parallel diodes D1, D2 and finally through the load.
The input/output voltage relationship of the power supply is as follows: vout=d/(1-D) ×vin. Wherein: VIN represents the power input voltage, VOUT represents the power output voltage, and D represents the on duty of the switching tube built in the power management chip.
In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (8)
1. The portable desktop power supply is characterized by comprising an input module, an output module, a SEPIC boosting module, an output filtering module and an output adjusting module, wherein the input module is electrically connected with the SEPIC boosting module, the SEPIC boosting module is electrically connected with the output adjusting module, the output adjusting module is electrically connected with the output filtering module, and the output filtering module is electrically connected with the output module; the SEPIC boosting module is used for allowing the output voltage to be larger than, smaller than or equal to the input voltage; the SEPIC boosting module comprises a polarity capacitor CIN, a capacitor C1, a capacitor C2, a capacitor C4, a capacitor C5, a capacitor C6, a power management chip, an inductor L1, an inductor L2, a diode D1, a diode D2 and a polarity capacitor COUT;
the positive terminal of the polarity capacitor CIN is electrically connected to one terminal of the capacitor C1, the VIN pin of the power management chip and one terminal of the inductor L1, the other terminal of the inductor L1 is electrically connected to the SW pin of the power management chip, one terminal of the capacitor C4, one terminal of the capacitor C5 and one terminal of the capacitor C6, the other terminal of the capacitor C4, the other terminal of the capacitor C5 and the other terminal of the capacitor C6 are electrically connected to the positive terminal of the diode D1, the positive terminal of the diode D2 and one terminal of the inductor L2, the negative terminal of the diode D1 is electrically connected to the negative terminal of the diode D2, the positive terminal of the polarity capacitor COUT and one terminal of the capacitor C2, the negative terminal of the polarity capacitor CIN, the other terminal of the capacitor C1, the GND pin of the power management chip, the other terminal of the inductor L2, the negative terminal of the polarity capacitor COUT and the other terminal of the capacitor C2 are electrically connected to the other terminal of the capacitor C2;
the positive terminal and the negative terminal of the polar capacitor CIN are used as the input terminal of the SEPIC boosting module, and the positive terminal and the negative terminal of the polar capacitor COUT are used as the output terminal of the SEPIC boosting module.
2. The portable desktop power supply according to claim 1, wherein the output adjusting module includes a resistor R3 and an adjustable potentiometer R4, one end of the resistor R3 is electrically connected to the FB pin of the power management chip and a certain pin of the adjustable potentiometer R4, another certain pin of the adjustable potentiometer R4 is electrically connected to the negative terminal of the diode D1, and the other end of the resistor R3 is grounded.
3. The portable desktop power supply according to claim 1, wherein the output filter module includes an inductor L3 and a capacitor C3, one end of the inductor L3 is electrically connected to the positive terminal of the polar capacitor COUT, the other end of the inductor L3 is electrically connected to one end of the capacitor C3 and the output module, and the other end of the capacitor C3 is grounded.
4. The portable desktop power supply of claim 1, further comprising a voltage measurement module comprising a three-wire voltmeter and a measurement terminal, the three-wire voltmeter electrically connected to the measurement terminal, the measurement terminal electrically connected to the output module.
5. The portable desktop power supply of claim 1, wherein the input module comprises a first terminal and a TypeC fast charge trigger, both of which are electrically connected to the input of the SEPIC boost module.
6. The portable desktop power supply of claim 1, wherein the output module includes a second terminal electrically connected to an output of the SEPIC boost module.
7. The portable desktop power supply of claim 1, further comprising a work indication module, wherein the work indication module comprises a resistor R1 and a diode LED1, wherein a series branch of the resistor R1 and the diode LED1 is connected in parallel with an input terminal of the SEPIC boost module.
8. The portable desktop power supply of claim 1, further comprising a voltage input indication module, wherein the voltage input indication module comprises a resistor R2 and a diode LED2, wherein a series branch of the resistor R2 and the diode LED2 is connected in parallel with an output of the output filter module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321051685.3U CN219678318U (en) | 2023-05-05 | 2023-05-05 | Portable desktop power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321051685.3U CN219678318U (en) | 2023-05-05 | 2023-05-05 | Portable desktop power supply |
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| Publication Number | Publication Date |
|---|---|
| CN219678318U true CN219678318U (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321051685.3U Active CN219678318U (en) | 2023-05-05 | 2023-05-05 | Portable desktop power supply |
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|---|---|
| CN (1) | CN219678318U (en) |
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2023
- 2023-05-05 CN CN202321051685.3U patent/CN219678318U/en active Active
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