CN203896028U - Multi-port usb charger - Google Patents
Multi-port usb charger Download PDFInfo
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- CN203896028U CN203896028U CN201420336467.9U CN201420336467U CN203896028U CN 203896028 U CN203896028 U CN 203896028U CN 201420336467 U CN201420336467 U CN 201420336467U CN 203896028 U CN203896028 U CN 203896028U
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- Y02B40/90—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a multi-port USB charger, which comprises a first rectification and filtering circuit, a voltage conversion circuit, a second rectification and filtering circuit, a plurality of constant-current control circuits, a sampling circuit, a comparison circuit and a pulse width modulation controller, wherein the first rectification and filtering circuit, the voltage conversion circuit and the second rectification and filtering circuit are sequentially connected in series; the plurality of constant-current control circuits are used for carrying out constant-current control on second voltage outputted by the second rectification and filtering circuit so as to output a plurality of groups of constant charging current through a plurality of correspondingly electrically connected USB ports; and the sampling circuit, the comparison circuit and the pulse width modulation controller are used for carrying out fine adjustment on the second voltage so as to output stable second voltage. The multi-port USB charger provided by the utility model has overcurrent, overvoltage, undervoltage protection functions, is low in standby power consumption, high in power conversion efficiency and large in the number of charging ports, and can charge a plurality of electronic products simultaneously.
Description
Technical field
The utility model relates to charger, relates in particular to a kind of multiport USB (Universal Serial Bus) charger.
Background technology
Along with the development of modern society, the electronic products such as mobile phone, electronic reader, music player, panel computer are more and more universal, this electronic product is all only equipped with charger one to one on the market, cannot realize multiple electronic products and charge simultaneously, can not meet some public place charging demands such as family, office.
Utility model content
The purpose of this utility model is, a kind of multiport USB charger is provided, to solve traditional technical problem of charging one to one.
To achieve these goals, the utility model provides a kind of multiport USB charger, for the input voltage of external power source is carried out to voltage transitions so that multiple electronic products are charged, described multiport USB charger comprises the first current rectifying and wave filtering circuit, voltage conversion circuit, the second current rectifying and wave filtering circuit, multiple constant-current control circuit, sample circuit, comparison circuit and Pwm controller.Described the first current rectifying and wave filtering circuit is for carrying out rectifying and wave-filtering to the input voltage of external power source.Described voltage conversion circuit is electrically connected on described the first current rectifying and wave filtering circuit, for the voltage of described the first current rectifying and wave filtering circuit output is carried out to voltage transitions to export the first voltage.Described the second current rectifying and wave filtering circuit is electrically connected on described voltage conversion circuit, for the first voltage of described voltage conversion circuit output is carried out to rectifying and wave-filtering with output second voltage.Described multiple constant-current control circuit is for respectively the second voltage of described the second current rectifying and wave filtering circuit output being carried out to constant current control, with the constant charging current of the many groups of multiple USB port outputs being electrically connected by correspondence.Described sample circuit is electrically connected on described the second current rectifying and wave filtering circuit, for exporting sampled voltage according to the second voltage of described the second current rectifying and wave filtering circuit output.Described comparison circuit is electrically connected on described sample circuit, for sampled voltage and a reference voltage of more described sample circuit output, to export compare result signal.Described Pwm controller is electrically connected on described comparison circuit and described voltage conversion circuit, for extremely described voltage conversion circuit of output pulse width modulation signal, described Pwm controller is also for adjust the duty ratio of exported pulse width modulating signal according to the compare result signal of described comparison circuit output, to regulate the first voltage of described voltage conversion circuit output.
Preferably, described multiport USB charger also comprises dynamic current charging circuit, and described dynamic current charging circuit is electrically connected on described the second current rectifying and wave filtering circuit, exports variable charging current for the USB port being electrically connected by correspondence.
Preferably, described dynamic current charging circuit regulates charging current according to the electronic equipment of described corresponding electrical connection.
Preferably, described multiport USB charger also comprises filter circuit, described the first current rectifying and wave filtering circuit, says that voltage conversion circuit, described comparison circuit and described Pwm controller are respectively by described filter circuit ground connection.
Preferably, described filter circuit is the first electric capacity.
Preferably, described comparison circuit comprises optocoupler transducer, the second electric capacity and voltage stabilizing didoe.Described optocoupler transducer comprises first input end, the second input, the first output and the second output, described first input end is electrically connected on described the second current rectifying and wave filtering circuit, described the second input is electrically connected on described sample circuit, described the first output is electrically connected on described Pwm controller, and described the second output is electrically connected on described filter circuit.Described the second electric capacity is electrically connected between first output and the second output of described optocoupler transducer.Described voltage stabilizing didoe positive pole is electrically connected on described filter circuit, and negative electricity is connected in the first output of described optocoupler transducer and the common port of described the second electric capacity.
Preferably, described sample circuit comprises the first resistance, the second resistance, voltage regulation unit, the 3rd resistance and the 4th resistance.Described first resistance one end is electrically connected on described the second current rectifying and wave filtering circuit.Described second resistance one end is electrically connected on the other end of described the first resistance, other end ground connection.Described voltage regulation unit comprises first end, the second end and control end, described first end ground connection, and described control end is electrically connected on the common port of described the first resistance and described the second resistance.Described the 3rd resistance one end is electrically connected on the control end of described voltage regulation unit, and the other end is electrically connected on the second end of described voltage regulation unit by the 3rd electric capacity.Described the 4th resistance one end is electrically connected on the second end of described voltage regulation unit, and the other end is electrically connected on described comparison circuit.
Preferably, described voltage regulation unit is TL431 chip.
Preferably; described multiport USB charger also comprises short circuit over-current protection circuit; be electrically connected between described the first current rectifying and wave filtering circuit and described external power source, for when the outside power supply short circuit, disconnect being connected of described the first current rectifying and wave filtering circuit and described external power source.
Preferably, described multiport USB charger also comprises lightning protection circuit, is electrically connected between described the first current rectifying and wave filtering circuit and described external power source, for the peaking voltage of filtering external power source, to carry out lightning protection.
The beneficial effects of the utility model: the utility model provides a kind of multiport USB charger; it has overcurrent, short circuit, overvoltage, under-voltage protection function; stand-by power consumption is low, power supply conversion efficiency is high, and has multiple charging ports, can charge for multiple electronic products simultaneously.
In order further to understand feature of the present utility model and technology contents, refer to following about detailed description of the present utility model and accompanying drawing, but accompanying drawing only provide with reference to and explanation use, be not used for the utility model to be limited.
Brief description of the drawings
Fig. 1 is the module map of multiport USB charger in the utility model one execution mode.
Fig. 2 is the circuit diagram of multiport USB charger in the utility model one execution mode.
Main element symbol description
Multiport USB charger 100
External power source 200
The first current rectifying and wave filtering circuit 10
Voltage conversion circuit 12
The second current rectifying and wave filtering circuit 14
Constant-current control circuit 16a, 16b, 16c
Sample circuit 18
Comparison circuit 20
Pwm controller 22
USB port 24a, 24b, 24c, 20d
Dynamic current charging circuit 26
Filter circuit 28
Short circuit over-current protection circuit 30
Lightning protection circuit 32
Voltage regulation unit S1
High-frequency filter capacitor Cr
First to fourth resistance R 1, R2, R3, R4
Voltage-stabiliser tube ZD1
The first to second capacitor C 1, C2
Optocoupler transducer Q1
Overcurrent short-circuit protection pipe RV1
Reference voltage V ref
Embodiment
Technological means and the effect thereof taked for further setting forth the utility model, be described in detail below in conjunction with preferred embodiment of the present utility model and accompanying drawing thereof.
Fig. 1 is the module map of multiport USB charger 100 in the utility model one execution mode.In the present embodiment, multiport USB charger 100 carries out voltage transitions so that multiple electronic product (not shown) are charged by the input voltage of external power source 200.Multiport USB charger 100 comprises the first current rectifying and wave filtering circuit 10, voltage conversion circuit 12, the second current rectifying and wave filtering circuit 14, multiple constant-current control circuit 16a, 16b, 16c (in the present embodiment, only taking three as example, but be not limited with three, can comprise greater or less than three constant-current control circuits), sample circuit 18, comparison circuit 20, Pwm controller 22 and multiple USB port 24a, 24b, 24c (in the present embodiment, only taking three as example, but be not limited with three, can comprise greater or less than three USB port).Each USB port 24a, 24b, 24c can export independently constant charging current one electronic product is charged.
The first current rectifying and wave filtering circuit 10 carries out rectifying and wave-filtering to the input voltage of external power source 200.Voltage conversion circuit 12 is electrically connected on the first current rectifying and wave filtering circuit 10, and the voltage that voltage conversion circuit 12 is exported the first current rectifying and wave filtering circuit 10 carries out voltage transitions to export the first voltage.The second current rectifying and wave filtering circuit 14 is electrically connected on the first voltage that voltage conversion circuit 12, the second current rectifying and wave filtering circuits 14 export voltage conversion circuit 12 and carries out rectifying and wave-filtering with output second voltage.In the present embodiment, second voltage is to determine its magnitude of voltage according to the specified charging voltage of electronic product, if second voltage can be the direct voltage of 5V.
Each constant-current control circuit 16a, 16b, 16c one by one correspondence are electrically connected on each USB port 24a, 24b, 24c, the second voltage that each constant-current control circuit 16a, 16b, 16c export the second current rectifying and wave filtering circuit 14 carries out constant current control, exports one group of constant charging current with USB port 24a, the 24b, the 24c that are electrically connected by correspondence.In the present embodiment, because multiple constant-current control circuit 16a, 16b, 16c are taking three as example, therefore multiple constant-current control circuit 16a, 16b, 16c can export three groups of constant charging currents by multiple USB port 24a, 24b, 24c, three groups of constant charging currents can be respectively 0.5mA, 1mA, 1mA.
Sample circuit 18 is electrically connected on the second current rectifying and wave filtering circuit 14, and the second voltage that sample circuit 18 is exported according to the second current rectifying and wave filtering circuit 14 is exported sampled voltage.Comparison circuit 20 is electrically connected on sample circuit 18, and comparison circuit 20 is exported compare result signal by sampled voltage and reference voltage V ref that relatively sample circuit 18 is exported.In the present embodiment, the ratio of the second voltage that the sampled voltage that sample circuit 18 is exported and the second current rectifying and wave filtering circuit 14 are exported can determine according to side circuit design, and reference voltage V ref can be 5V direct voltage.
Pwm controller 22 is electrically connected on comparison circuit 20 and voltage conversion circuit 12, and Pwm controller 22 output pulse width modulation signals are to voltage conversion circuit 12, so that voltage conversion circuit 12 carries out voltage transitions.The compare result signal that Pwm controller 22 is also exported according to comparison circuit 20 is adjusted the duty ratio of exported pulse width modulating signal, the first voltage of exporting with regulation voltage change-over circuit 12, thus make the second voltage that the second current rectifying and wave filtering circuit 14 can stable outputs.
In the utility model one execution mode, multiport USB charger 100 also comprises dynamic current charging circuit 26 and USB port 24d, and dynamic current charging circuit 26 is electrically connected on the second current rectifying and wave filtering circuit 14 and USB port 24d.The USB port 24d that dynamic current charging circuit 26 is electrically connected by correspondence exports variable charging current.Dynamic current charging circuit 26 regulates charging current according to the electronic product (as: mobile phone, panel computer) of correspondence electrical connection.In the present embodiment, the charging current maximum that dynamic current charging circuit 26 is exported can be 2A.
In the utility model one execution mode, multiport USB charger 100 also comprises filter circuit 28.Filter circuit 28 is for filtering high-frequency interferencing signal.The first current rectifying and wave filtering circuit 10, voltage conversion circuit 12, comparison circuit 20 and Pwm controller 22 are all by filter circuit 28 ground connection.Multiport USB charger 100 avoids the electronic product to be charged with touch-screen to occur insensitive phenomenon by setting up filter circuit 28.
In the utility model one execution mode, multiport USB charger 100 also comprises short circuit over-current protection circuit 30 and lightning protection circuit 32.Short circuit over-current protection circuit 30 is electrically connected between the first current rectifying and wave filtering circuit 10 and external power source 200; short circuit over-current protection circuit 30 is for when external power source 200 short circuit; disconnect being connected of the first current rectifying and wave filtering circuit 10 and external power source 200, thereby protect multiport USB charger 100 not to be burned.Lightning protection circuit 32 is electrically connected between the first current rectifying and wave filtering circuit 10 and short circuit over-current protection circuit 30, the peaking voltage of lightning protection circuit 32 in can filtering external power source 200 input voltages, thus realize lightning protection.
Fig. 2 is the circuit diagram of multiport USB charger 100 in the utility model one execution mode.In the present embodiment, the first current rectifying and wave filtering circuit 10 comprises full bridge rectifier and filter capacitor, thereby realize, the input voltage of external power source 200 is carried out to rectifying and wave-filtering.Voltage conversion circuit 12 is that the voltage transitions module that includes transformer and switching tube in prior art is realized voltage transitions.The second current rectifying and wave filtering circuit 14 comprises rectifier diode and the filter capacitor for rectification.Multiple constant-current control circuit 16a, 16b, 16c include constant current control chip, and multiple constant-current control circuit 16a, 16b, 16c realize constant current control by constant current control chip.
Filter circuit 28 comprises high-frequency filter capacitor Cr.Multiport USB charger 100 carrys out the high-frequency interferencing signal of filtering voltage conversion circuit 12 input sides by high-frequency filter capacitor Cr.Sample circuit 18 comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, voltage regulation unit S1 and the first capacitor C 1.First resistance R 1 one end is electrically connected on the second current rectifying and wave filtering circuit 14.Second resistance R 2 one end are electrically connected on the other end of the first resistance R 1, the other end ground connection of the second resistance R 2.Voltage regulation unit S1 comprises first end, the second end and control end, the first end ground connection of voltage regulation unit S1, and the control end of voltage regulation unit S1 is electrically connected on the common port of the first resistance R 1 and the second resistance R 2.The 3rd resistance R 3 one end are electrically connected on the control end of voltage regulation unit S1, and the other end of the 3rd resistance R 3 is electrically connected on one end of the first capacitor C 1, and the other end of the first capacitor C 1 is electrically connected on the second end of voltage regulation unit S1.One end of the 4th resistance R 4 is electrically connected on the common port of voltage regulation unit S1 and the first capacitor C 1, and the other end of the 4th resistance R 4 is electrically connected on comparison circuit 20.In the present embodiment, voltage regulation unit S1 is TL431 chip.
Comparison circuit 20 comprises optocoupler transducer Q1, the second capacitor C 2 and voltage stabilizing didoe ZD1.Optocoupler transducer Q1 comprises first input end, the second input, the first output and the second output.The first input end of optocoupler transducer Q1 is used for receiving reference voltage V ref, the second input of optocoupler transducer Q1 is electrically connected on the other end of the 4th resistance R 4, the first output of optocoupler transducer Q1 is electrically connected on Pwm controller 22, the second output of optocoupler transducer Q1 is electrically connected on one end of high-frequency filter capacitor Cr, the other end ground connection of high-frequency filter capacitor Cr.One end of the second capacitor C 2 is electrically connected between the first output and the second output of optocoupler transducer S1.The positive pole of voltage stabilizing didoe ZD1 is electrically connected on one end of high-frequency filter capacitor Cr, and the negative electricity of voltage stabilizing didoe ZD1 is connected in the first output of optocoupler transducer S1 and the common port of the second capacitor C 2.Comparison circuit 20 realizes by optocoupler transducer Q1 the sampled voltage that benchmark voltage Vref and sample circuit 18 are exported, to export compare result signal.In other execution modes of the present utility model, the first input end of optocoupler transducer Q1 can also be electrically connected to the second current rectifying and wave filtering circuit 14, substitutes reference voltage V ref thereby obtain the second voltage that the second current rectifying and wave filtering circuit 14 exports.
Pwm controller 22 can be SP5808 power supply chip, and it is little that SP5808 power supply chip has stand-by power consumption, the defencive function such as the high and overvoltage of conversion efficiency, overcurrent.Pwm controller 22 is controlled the switching tube conducting in voltage conversion circuit 12 and is turn-offed to export the first voltage by output pulse width modulation signal.Short circuit over-current protection circuit 30 is overcurrent short-circuit protection pipe RV1.Lightning protection circuit 32 comprises capacitor and inductor filter circuit, with the peaking voltage in filtering external power source, realizes lightning protection.
In sum, the utility model provides a kind of multiport USB charger, and it has overcurrent, short circuit, overvoltage, under-voltage protection function, and stand-by power consumption is low, power supply conversion efficiency is high, and has multiple charging ports, can charge for multiple electronic products simultaneously.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection range of the utility model claim.
Claims (10)
1. a multiport USB charger, for the input voltage of external power source is carried out to voltage transitions so that multiple electronic products are charged, is characterized in that, described multiport USB charger comprises:
The first current rectifying and wave filtering circuit, for carrying out rectifying and wave-filtering to the input voltage of external power source;
Voltage conversion circuit, is electrically connected on described the first current rectifying and wave filtering circuit, for the voltage of described the first current rectifying and wave filtering circuit output is carried out to voltage transitions to export the first voltage;
The second current rectifying and wave filtering circuit, is electrically connected on described voltage conversion circuit, for the first voltage of described voltage conversion circuit output is carried out to rectifying and wave-filtering with output second voltage;
Multiple constant-current control circuits, for respectively the second voltage of described the second current rectifying and wave filtering circuit output being carried out to constant current control, with the constant charging current of the many groups of multiple USB port outputs being electrically connected by correspondence;
Sample circuit, is electrically connected on described the second current rectifying and wave filtering circuit, for exporting sampled voltage according to the second voltage of described the second current rectifying and wave filtering circuit output;
Comparison circuit, is electrically connected on described sample circuit, for sampled voltage and a reference voltage of more described sample circuit output, to export compare result signal; And
Pwm controller, be electrically connected on described comparison circuit and described voltage conversion circuit, for extremely described voltage conversion circuit of output pulse width modulation signal, described Pwm controller is also for adjust the duty ratio of exported pulse width modulating signal according to the compare result signal of described comparison circuit output, to regulate the first voltage of described voltage conversion circuit output.
2. multiport USB charger as claimed in claim 1, it is characterized in that, also comprise dynamic current charging circuit, described dynamic current charging circuit is electrically connected on described the second current rectifying and wave filtering circuit, exports variable charging current for the USB port being electrically connected by correspondence.
3. multiport USB charger as claimed in claim 2, is characterized in that, described dynamic current charging circuit regulates charging current according to the electronic equipment of described corresponding electrical connection.
4. multiport USB charger as claimed in claim 1, it is characterized in that, also comprise filter circuit, described the first current rectifying and wave filtering circuit, say that voltage conversion circuit, described comparison circuit and described Pwm controller are respectively by described filter circuit ground connection.
5. multiport USB charger as claimed in claim 4, is characterized in that, described filter circuit is the first electric capacity.
6. multiport USB charger as claimed in claim 4, is characterized in that, described comparison circuit comprises:
Optocoupler transducer, comprise first input end, the second input, the first output and the second output, described first input end is electrically connected on described the second current rectifying and wave filtering circuit, described the second input is electrically connected on described sample circuit, described the first output is electrically connected on described Pwm controller, and described the second output is electrically connected on described filter circuit;
The second electric capacity, is electrically connected between first output and the second output of described optocoupler transducer; And
Voltage stabilizing didoe, positive pole is electrically connected on described filter circuit, and negative electricity is connected in the first output of described optocoupler transducer and the common port of described the second electric capacity.
7. multiport USB charger as claimed in claim 1, is characterized in that, described sample circuit comprises:
The first resistance, one end is electrically connected on described the second current rectifying and wave filtering circuit;
The second resistance, one end is electrically connected on the other end of described the first resistance, other end ground connection;
Voltage regulation unit, comprises first end, the second end and control end, described first end ground connection, and described control end is electrically connected on the common port of described the first resistance and described the second resistance;
The 3rd resistance, one end is electrically connected on the control end of described voltage regulation unit, and the other end is electrically connected on the second end of described voltage regulation unit by the 3rd electric capacity; And
The 4th resistance, one end is electrically connected on the second end of described voltage regulation unit, and the other end is electrically connected on described comparison circuit.
8. multiport USB charger as claimed in claim 7, is characterized in that, described voltage regulation unit is TL431 chip.
9. multiport USB charger as claimed in claim 1; it is characterized in that; also comprise short circuit over-current protection circuit; be electrically connected between described the first current rectifying and wave filtering circuit and described external power source; for in the time of outside power supply short circuit, disconnect being connected of described the first current rectifying and wave filtering circuit and described external power source.
10. multiport USB charger as claimed in claim 1, is characterized in that, also comprises lightning protection circuit, is electrically connected between described the first current rectifying and wave filtering circuit and described external power source, for the peaking voltage of filtering external power source, to carry out lightning protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420336467.9U CN203896028U (en) | 2014-06-23 | 2014-06-23 | Multi-port usb charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420336467.9U CN203896028U (en) | 2014-06-23 | 2014-06-23 | Multi-port usb charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203896028U true CN203896028U (en) | 2014-10-22 |
Family
ID=51722384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420336467.9U Expired - Fee Related CN203896028U (en) | 2014-06-23 | 2014-06-23 | Multi-port usb charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203896028U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026705A (en) * | 2016-06-24 | 2016-10-12 | 深圳创维－Rgb电子有限公司 | Adapter |
| CN108418274A (en) * | 2018-04-02 | 2018-08-17 | 广州昂宝电子有限公司 | Multiport battery charger |
| CN111628537A (en) * | 2020-04-24 | 2020-09-04 | 杭州士兰微电子股份有限公司 | Multi-path charging circuit and protocol control module and control method thereof |
-
2014
- 2014-06-23 CN CN201420336467.9U patent/CN203896028U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026705A (en) * | 2016-06-24 | 2016-10-12 | 深圳创维－Rgb电子有限公司 | Adapter |
| CN108418274A (en) * | 2018-04-02 | 2018-08-17 | 广州昂宝电子有限公司 | Multiport battery charger |
| CN111628537A (en) * | 2020-04-24 | 2020-09-04 | 杭州士兰微电子股份有限公司 | Multi-path charging circuit and protocol control module and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171030 Address after: 518000 Guangdong city of Shenzhen province Qianhai Shenzhen Hong Kong cooperation zone before Bay Road No. 1 building 201 room A (located in Shenzhen Qianhai business secretary Co. Ltd.) Patentee after: Shenzhen Zhongyu Supply Chain Management Co., Ltd. Address before: 518000, 405, 401, SED District, Zhenhua Road, Shenzhen, Guangdong, Futian District Patentee before: SHENZHEN BAILIHUI ELECTRONICS CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20190623 |