CN208874473U - A kind of Switching Power Supply and charger - Google Patents
A kind of Switching Power Supply and charger Download PDFInfo
- Publication number
- CN208874473U CN208874473U CN201821157806.1U CN201821157806U CN208874473U CN 208874473 U CN208874473 U CN 208874473U CN 201821157806 U CN201821157806 U CN 201821157806U CN 208874473 U CN208874473 U CN 208874473U
- Authority
- CN
- China
- Prior art keywords
- filter
- power supply
- voltage
- pcb board
- switching device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to a kind of Switching Power Supply and charger, the Switching Power Supply includes: pcb board, first filter, rectifier circuit, PWM controller, switching device, transformer, feed circuit and second filter.First filter is suitable for filtering；Rectifier circuit is suitable for rectification；PWM controller, suitable for controlling the electric current for flowing through transformer；Transformer, thickness is no more than preset thickness threshold value, and magnetic circuit is not less than preset magnetic circuit threshold value, is suitable for voltage in switching device shutdown, after output buck to stating second filter；Second filter is suitable for rectification, filtering；Feed circuit, suitable for sampling deviation DC voltage and feed back to PWM controller；PWM controller is further adapted for exporting the pwm signal of duty ratio corresponding to switching device, until the second filter exports the DC voltage of default size.Using above-mentioned scheme, the volume of power supply can be reduced and improve the efficiency of complete product.
Description
Technical field
The utility model relates to the fields such as power technology, PWM technology more particularly to a kind of Switching Power Supply and chargers.
Background technique
In the conversion process of energy of power supply itself work, because such as switching device own efficiency is low or electric current flows through load
The reasons such as the power loss that fluid element generates in element internal resistance, may cause power loss part energy, and these energy
Amount can be lost in the form of heat to be dissipated, and limited in view of element self-radiating ability, therefore when these thermal accumlations are to centainly
Degree, namely more than component itself heatproof when, will result in component damage, so as to cause whole system collapse.
In order to avoid the generation of this collapse, current Switching Power Supply is all specially provided with cooling fin, thermal window or wind
Fan etc., to be used to take away damaging heat, so as to achieve the purpose that heat dissipation.
But it is bulky that these cooling fins, thermal window and fan cause entire power-supply system, and then limits complete machine
The volume of product even purposes.
Utility model content
The utility model solves the problems, such as it is the volume for how reducing power supply and the efficiency for improving complete product.
To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of Switching Power Supply, the Switching Power Supply packets
It includes: pcb board, first filter, rectifier circuit, PWM controller, switching device, transformer, feed circuit and the second filtering
Device, in which: the transformer and second filter are set to the one side of the pcb board, the first filter, rectifier bridge electricity
Road, PWM controller, switching device and feed circuit are set to the another side of the pcb board, and:
The first filter is suitable for being filtered the alternating current of input；
The rectifier circuit, suitable for the alternating current after accepting filter, by the filtered AC rectification at direct current
Electricity, and using the direct current as power supply to the switching device；
The PWM controller provides the pwm signal for completing modulation suitable for controlling to the switching device accordingly to control institute
The on-off of switching device is stated, while the electric current of the transformer is flowed through in control；
The transformer, thickness is no more than preset thickness threshold value, and magnetic circuit is not less than preset magnetic circuit threshold value, is suitable for
When the switching device turns off, voltage after output buck to the second filter；
The second filter, suitable for being rectified, being filtered to the voltage after the decompression, to export the straight of default size
Galvanic electricity pressure；
The feed circuit is more than preset threshold value suitable for presetting size described in the DC voltage deviation when the output
When, the DC voltage of sampling deviation simultaneously feeds back to the PWM controller；
The PWM controller is further adapted for after receiving the DC voltage of deviation of the feed circuit feedback, output pair
Answer the pwm signal of duty ratio to the switching device, until the second filter exports the DC voltage of default size.
Optionally, the switching device is the metal-oxide-semiconductor that internal resistance is lower than default internal resistance threshold value, and the switching device is veneer
It encapsulates, be installed on the pcb board.
Optionally, it is to cover copper conductor more than preset thickness threshold value that the pcb board, which covers copper thickness,.
Optionally, the electrolytic capacitor in the second filter, damage of the electrolytic capacitor in energy storage charge and discharge process
Consumption is lower than preset loss threshold value.
Optionally, the electrolytic capacitor is set to the pcb board by heavy plate technique.
Optionally, the transformer is set to the pcb board by heavy plate technique.
The utility model embodiment provides a kind of charger, and the charger includes the electricity of switch described in any of the above
Source.
As above, Switching Power Supply provided by the utility model is no more than preset thickness threshold value using thickness, and magnetic circuit is not low
In the transformer of preset magnetic circuit threshold value, namely using the transformer of ultra-thin big magnetic circuit, therefore Switching Power Supply thickness can reduced
Heat is reduced while spending, and so as to reduce the volume of power supply, improves the efficiency of complete product.
Further, it since the switching device of the utility model is the metal-oxide-semiconductor that internal resistance is lower than default internal resistance threshold value, and directly pastes
It on pcb board, therefore can radiate while leaning on pcb board conduction, to make the heat of switching tube under ultralow thermal resistance
Control is within the scope of safety standard requirements and there are enough surpluses, therefore the efficiency of complete product can be improved.
Further, current-carrying internal resistance loss is not only reduced, is also acted as general as pcb board by using the copper foil of thickening
The cooling fin of logical switching device, therefore the efficiency of complete product can be improved.
For the above content of the utility model can be clearer and more comprehensible, preferred embodiment and detailed in conjunction with attached drawing is cited below particularly
Explanation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one of the utility model embodiment Switching Power Supply；
Fig. 2 is the structural schematic diagram of another Switching Power Supply in the utility model embodiment.
Specific embodiment
The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this theory
The bright revealed content of book understands other advantages and effect of the utility model easily.Although the description of the utility model will tie
It closes preferred embodiment to introduce together, but this feature for not representing this utility model is only limitted to the embodiment.On the contrary, knot
Closing the purpose that embodiment makees utility model introduction is to be possible to extend to cover the claim based on the utility model
Other selections or transformation out.In order to provide to the understanding of the depth of the utility model, be described below in will be comprising many specific
Details.The utility model can also be implemented without using these details.In addition, in order to avoid the weight of chaotic or fuzzy the utility model
Point, some details will be omitted in the de-scription.It should be noted that in the absence of conflict, in the utility model
Feature in embodiment and embodiment can be combined with each other.
As described above, currently, due to cooling fin, thermal window and fan etc. setting, cause entire power-supply system body
Product is huge, and then limits the volume even purposes of complete product.
To solve the above problems, the utility model embodiment provides Switching Power Supply, it is no more than by using thickness default
Thickness threshold value, and magnetic circuit be not less than preset magnetic circuit threshold value transformer, namely using ultra-thin big magnetic circuit transformer, therefore
Heat can be reduced while reducing Switching Power Supply thickness, so as to reduce the volume of power supply, improve the effect of complete product
Rate.
To more fully understand those skilled in the art and realizing the utility model, Fig. 1 shows the utility model reality
The structural schematic diagram of one of example Switching Power Supply is applied, as shown in Figure 1, the Switching Power Supply may include: that pcb board (does not show
Out), first filter 11, rectifier circuit 12, PWM controller, switching device 13, transformer 14, feed circuit 16 and second
Filter 15.
Wherein: the transformer 14 and second filter 15 are set to the one side of the pcb board, the first filter
11, rectifier circuit 12, PWM controller, switching device 13 and feed circuit 16 are set to the another side of the pcb board, change sentence
It talks about, the pcb board in the utility model embodiment is the settable component of two-sided setting namely two sides.
In specific implementation, the first filter 11 may be adapted to be filtered the alternating current of input.
The rectifier circuit 12, suitable for the alternating current after accepting filter, by the filtered AC rectification Cheng Zhi
Galvanic electricity, and using the direct current as power supply to the switching device 13.
The PWM controller provides the pwm signal for completing modulation suitable for controlling to the switching device 13 accordingly to control
The on-off of the switching device 13, while the electric current of the transformer 14 is flowed through in control.
The transformer 14, thickness is no more than preset thickness threshold value, and magnetic circuit is not less than preset magnetic circuit threshold value, is suitable for
In the switching device 13 shutdown, voltage after output buck to the second filter 15.In other words, the utility model is adopted
With the high frequency transformer 14 of ultra-thin, big magnetic circuit, little Bao and efficiently may be implemented, therefore can be converted to low pressure in power supply high pressure
It plays a key effect in journey.
The second filter 15, suitable for being rectified, being filtered to the voltage after the decompression, to export default size
DC voltage.
The feed circuit 16 is more than preset threshold value suitable for presetting size described in the DC voltage deviation when the output
When, in other words, when the deviation of the instantaneous value of the DC voltage of the output and the voltage of default size is more than preset threshold value,
With the DC voltage of sampling deviation and the PWM controller can be fed back to.For example, the voltage of default size is 15V, output it is straight
The instantaneous value of galvanic electricity pressure is 15.4V, and preset threshold value is 0.2V, then DC voltage at this time and the voltage of the default size
Deviation is 0.4V=15.4V-15V, and deviation 0.4V is more than preset threshold value 0.2V.Correspondingly, the PWM controller, also
Suitable for after the DC voltage for receiving the deviation that the feed circuit 16 is fed back, exporting the pwm signal of duty ratio corresponding to institute
Switching device 13 is stated, until the second filter 15 exports the DC voltage of default size.Therefore entire Switching Power Supply can be with
The loop of a closed-loop control is formed, so as to improve the accuracy of control.
In an embodiment of the utility model, the first filter 11 can be electromagnetic interference (Electromagnetic
Interference, EMI) filter.
For a Switching Power Supply, switching device 13 is the main component of loss, in order to improve the longevity of switch block
Life, in specific implementation, the switch block can be metal-oxide-semiconductor.
In order to reduce damage of the booting dash current to component, in an embodiment of the utility model, the switch electricity
Source is also built-in with soft starting circuit or protection circuit.Specifically, the soft starting circuit or protection circuit may include over-voltage
Protect circuit, current foldback circuit, thermal-shutdown circuit and short-circuit protection circuit etc..Also, in the utility model embodiment
Switching Power Supply can optimize electromagnetic compatibility using frequency jitter using the working frequency of fixed 65KHz
(ElectroMagnetic Compatibility, EMC) circuit.
In an embodiment of the utility model, Switching Power Supply can built-in discontinuous operation pattern, therefore underloading can be optimized
Efficiency, and reduce no-load power consumption.
In an embodiment of the utility model, the switching device 13 is the metal-oxide-semiconductor that internal resistance is lower than default internal resistance threshold value, therefore
Low switching loss and low temperature are generated under internal resistance that can be low in switching process.Also, the switching device 13 is patch
Face encapsulation is directly mounted on the pcb board, therefore can be radiated while leaning on pcb board conduction, thus under ultralow thermal resistance
So that the heat of switching tube controls within the scope of safety requirement and there are enough surpluses, therefore the effect of complete product can be improved
Rate.
In order to improve the efficiency of complete product, in another embodiment of the utility model, it is super that the pcb board, which covers copper thickness,
The copper conductor that covers of preset thickness threshold value is crossed, and because by using the copper foil of thickening as pcb board, although increasing than common power
Double thickness, but effect is many times of common pcb board, therefore can not only reduce current-carrying internal resistance loss, it can be with
The aluminium radiator fin for serving as regular tap power supply carries out thermally conductive and heat dissipation, because copper and aluminium thermal coefficient are 380W/ respectively at 100 °
M.K and 238W/M.K, therefore small thickness increase but brings very big improved efficiency.
In an embodiment of the utility model, the preset thickness threshold value can be 2Oz, those skilled in the art according to
Actual needs, can also select other suitable thickness as thickness threshold value.
It should be noted that electrolytic capacitor is exactly service life shorter accessory in Switching Power Supply, research and experiments have shown that, electrolysis
Capacitance temperature is every to reduce by 10 °, and the service life doubles.Therefore in an embodiment of the utility model, filled by using in energy storage
Electrolytic capacitor of the loss lower than the electrolytic capacitor of preset loss threshold value namely in the utility model in discharge process is in capacitor
The loss in internal resistance is reduced in energy storage charge and discharge process, it is possible to reduce heat occurs, and promotes transfer efficiency, therefore can be promoted open
The service life in powered-down source.
In an embodiment of the utility model, the electrolytic capacitor is set to the pcb board by heavy plate technique, it is specific and
Speech corresponds to component body bottom opening by heavy plate technique on pcb board, then component body part or all
It sinks on pcb board relative to first filter 11, rectifier circuit 12, PWM controller, switching device 13 and feed circuit 16
Another side, to make the exposed height of high transformer 14 be reduced to exposed 9mm from 10mm, not only reduce thickness and be conducive to
Transformer 14 radiates.
In order to reduce the volume of Switching Power Supply, in specific implementation, transformer 14 can also also be set by heavy plate technique
It is placed on pcb board.
In detail, electrolytic capacitor body bottom portion aperture can be corresponded on pcb board, and then the one of electrolytic capacitor ontology
It partly sinks on pcb board relative to first filter 11, rectifier circuit 12, PWM controller, switching device 13 and feed circuit 16
Another side, so as to so that the exposed top in pcb board the 3.5mm of electrolytic capacitor ontology, and in addition 5.5mm is exposed in PCB
The bottom of plate, and then the front of Switching Power Supply and ground face thickness can be made to reduce 5mm respectively.
To more fully understand the utility model convenient for those skilled in the art, Fig. 2 shows in the utility model embodiment
Another Switching Power Supply structural schematic diagram, describe in detail below to the working principle of Switching Power Supply shown in Figure 2,
In Fig. 2, the Switching Power Supply includes electromagnetic interface filter 21, rectifier circuit 22, metal-oxide-semiconductor 23, transformer 24, filter 25, anti-
Current feed circuit 26 and PWM controller 27.Working principle are as follows:
AC power source is input to electromagnetic interface filter 21 first, when AC power source is after electromagnetic interface filter 21 is filtered out interference,
Direct current is rectified by rectifier circuit 22, using the power supply as switch conversion.
Then, PWM controller 27 controls integrated circuit (Integrated Circuit, the IC) device in pcb board to MOS
Pipe 23 provides the pulse-width-modulating signal modulated, and to control the on-off of metal-oxide-semiconductor 23, while the primary line of transformer 24 is flowed through in control
The electric current of circle, because the electric current flowed through in inductance will not be mutated, the secondary coil in transformer 24 is defeated in switch OFF
Voltage after being depressured out can be rectified and be filtered through filter 25, and final output presets the DC voltage of size.It is practical new at this
In one embodiment of type, the default size can be 15V, and according to actual needs, direct electricity can be set in those skilled in the art
The size of pressure.
In order to improve the accuracy of adjusting, in an embodiment of the utility model, as the 15V for leading to output because of load change
When voltage changes, the voltage signal for sampling variation can be fed back to PWM controller 27, PWM control by feed circuit 26
The pwm signal of device 27 by comparing, after operation after one correction duty ratio of output is to metal-oxide-semiconductor 23, until exporting stable 15V electricity
Pressure, so may be constructed a closed-loop control.
To sum up, the utility model embodiment thickeies copper foil thermal conductivity matching surface mounting technology using PCB, can reduce
Thermal losses improves production efficiency.Meanwhile power supply thickness is reduced using heavy plate technique, heat dissipation effect can be improved, using low interior
It hinders, the component of low clearance, thermal losses and spatial altitude can be reduced.And low loss brings high efficiency, small volume drop
The low dosage of material, therefore more contributions are made with energy conservation and environmental protection fermentation for reducing environmental pollution for advocating now.
The utility model additionally provides a kind of charger, can specifically include above-mentioned any Switching Power Supply.Moreover, by
Pass through the internal resistance of reduction current-carrying and switching component, the side such as conversion transformer 24 of ultra-thin, the big magnetic circuit of use in the utility model
Method can reduce heat while reducing power supply thickness, so as to reduce the volume of power supply, and then can reduce and such as fill
The volume of the complete product of electric appliance, therefore the temperature of complete machine can be reduced, improve the efficiency of complete machine.
In conclusion the principles of the present invention and its function is only illustrated in above-described embodiment provided by the utility model
Effect, rather than limits the present invention.Any person skilled in the art all can without prejudice to the utility model spirit and
Under the scope of, it carries out modifications and changes to above-described embodiment.Therefore, those of ordinary skill in the art is not taking off such as
All equivalent modifications or change completed under spirit revealed from the utility model and technical idea, should be practical new by this
The claim of type is covered.
Claims (7)
1. a kind of Switching Power Supply characterized by comprising pcb board, first filter, rectifier circuit, PWM controller, switch
Device, transformer, feed circuit and second filter, in which: the transformer and second filter are set to the pcb board
On one side, the first filter, rectifier circuit, PWM controller, switching device and feed circuit are set to the pcb board
Another side, and:
The first filter is suitable for being filtered the alternating current of input；
The rectifier circuit, suitable for the alternating current after accepting filter, by the filtered AC rectification at direct current, and
Using the direct current as power supply to the switching device；
The PWM controller provides the pwm signal for completing modulation to the switching device suitable for controlling accordingly to control described open
The on-off of device is closed, while the electric current of the transformer is flowed through in control；
The transformer, thickness is no more than preset thickness threshold value, and magnetic circuit is not less than preset magnetic circuit threshold value, is suitable for described
When switching device turns off, voltage after output buck to the second filter；
The second filter, suitable for being rectified, being filtered to the voltage after the decompression, to export the direct current of default size
Pressure；
The feed circuit is adopted when being more than preset threshold value suitable for presetting size described in the DC voltage deviation when the output
The DC voltage of sample deviation simultaneously feeds back to the PWM controller；
The PWM controller is further adapted for after receiving the DC voltage of deviation of the feed circuit feedback, and output correspondence accounts for
The pwm signal of empty ratio is to the switching device, until the second filter exports the DC voltage of default size.
2. Switching Power Supply as described in claim 1, which is characterized in that the switching device is that internal resistance is lower than default internal resistance threshold value
Metal-oxide-semiconductor, and the switching device be overlay packaged, be installed on the pcb board.
3. Switching Power Supply as described in claim 1, which is characterized in that it is more than preset thickness that the pcb board, which covers copper thickness,
Threshold value covers copper conductor.
4. Switching Power Supply as described in claim 1, which is characterized in that the electrolytic capacitor in the second filter, the electricity
It solves loss of the capacitor in energy storage charge and discharge process and is lower than preset loss threshold value.
5. Switching Power Supply as claimed in claim 4, which is characterized in that the electrolytic capacitor is set to described by heavy plate technique
Pcb board.
6. Switching Power Supply as described in claim 1, which is characterized in that the transformer is set to described by heavy plate technique
Pcb board.
7. a kind of charger, which is characterized in that including the described in any item Switching Power Supplies of claim 1~6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821157806.1U CN208874473U (en) | 2018-07-20 | 2018-07-20 | A kind of Switching Power Supply and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821157806.1U CN208874473U (en) | 2018-07-20 | 2018-07-20 | A kind of Switching Power Supply and charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208874473U true CN208874473U (en) | 2019-05-17 |
Family
ID=66463360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821157806.1U Active CN208874473U (en) | 2018-07-20 | 2018-07-20 | A kind of Switching Power Supply and charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208874473U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020015685A1 (en) * | 2018-07-20 | 2020-01-23 | 上海棱式工业科技有限公司 | Switching power supply and charger |
| CN116533260A (en) * | 2023-04-28 | 2023-08-04 | 上海长征医院 | Anti-interference method of vein anesthesia robot system for ship |
-
2018
- 2018-07-20 CN CN201821157806.1U patent/CN208874473U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020015685A1 (en) * | 2018-07-20 | 2020-01-23 | 上海棱式工业科技有限公司 | Switching power supply and charger |
| CN116533260A (en) * | 2023-04-28 | 2023-08-04 | 上海长征医院 | Anti-interference method of vein anesthesia robot system for ship |
| CN116533260B (en) * | 2023-04-28 | 2024-04-09 | 上海长征医院 | Anti-interference method of vein anesthesia robot system for ship |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108471232B (en) | Double rectifier bridge formula single stage power factor correction power circuit | |
| CN108521223B (en) | Switching power circuit | |
| CN208874473U (en) | A kind of Switching Power Supply and charger | |
| CN104578844A (en) | Switching mode power supply circuit | |
| CN201869103U (en) | Variable-voltage power supply | |
| CN204156616U (en) | For the self-induction power-supply circuit of intelligent grid sensing device | |
| CN202276293U (en) | An intelligent switch power source with constant output power | |
| CN105576840A (en) | Self-induction electricity taking circuit for smart power grid sensing device | |
| CN208226890U (en) | A kind of switching power circuit | |
| CN106160024A (en) | A kind of high-voltage power transmission device towards wireless energy transfer system | |
| CN212486395U (en) | Power supply system with ultrahigh power density | |
| CN201499009U (en) | Flameproof inverter charger | |
| CN204068742U (en) | Low-power power adapter drive circuit | |
| CN209787063U (en) | AC-DC adapter | |
| CN205039715U (en) | High -pressure wide region dual output power module of integrated integration | |
| CN114362272A (en) | Ultra-thin trinity power supply unit | |
| WO2020015685A1 (en) | Switching power supply and charger | |
| CN203801099U (en) | Power circuit and microwave oven | |
| CN202135357U (en) | LED street lamp driving power supply | |
| CN207869002U (en) | A kind of air-cooled high-power high-frequency switch power supply voltage transforming rectifier | |
| CN108306528A (en) | High voltage charging power supply device | |
| CN206585477U (en) | A kind of compact power supply module | |
| CN202106127U (en) | CPU-controlled high-power portable electric welding machine | |
| CN204497988U (en) | A kind of switch power source driving circuit | |
| CN206023610U (en) | Break-make is after hot type controlling switch circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |