CN202206159U

CN202206159U - General USB (universal serial bus) charger

Info

Publication number: CN202206159U
Application number: CN2011203360477U
Authority: CN
Inventors: 何濂洵; 周宜昌; 易俊士
Original assignee: ANNSO TECHNOLOGY Co Ltd
Current assignee: Cyber Power Systems Inc
Priority date: 2011-09-08
Filing date: 2011-09-08
Publication date: 2012-04-25
Anticipated expiration: 2021-09-08

Abstract

The utility model relates to a general USB (universal serial bus) charger which is used for connecting an electronic device in which a group of preset voltage values are stored. The general USB charger comprises a power supply circuit, a USB interface and an output voltage switching module, wherein a VBUS (video universal serial bus) contact and a grounding contact of the USB interface are respectively connected with a direct current voltage source and a grounding end of the power supply circuit, the output voltage switching module comprises a plurality of groups of preset voltage units respectively corresponding to a plurality of electronic devices of different manufacturers, each of the preset voltage units can be used for outputting a D<+> voltage and a D<-> voltage, a switching interface is connected between the preset voltage units and D<+> contacts and D<-> contacts of the USB interface and is operated by an operator, the D<+> contacts and the D<-> contacts of the USB interface are selected to output the D<+> voltage and the D<-> voltage which are required by the manufacturers, the electronic device is used for identifying that whether the D<+> voltage and the D<-> voltage which are output by the general USB charger are consistent with the group of preset voltage values or not, so that the general USB charger is allowed to be charged.

Description

Universal USB charger

Technical field

The utility model is about a kind of USB charger, refers to a kind of Universal USB charger especially.

Background technology

USB (Universal Serial Bus is called for short USB) interface is one of the most general now connecting interface, and its specification is to comprise a V _BUSContact, a D ⁺Contact, a D ^-A contact and a ground contact, and this V wherein _BUSContact and this ground contact are in order to a direct current voltage to be provided, and this D ⁺Contact and this D ^-Contact then can be used to transmit data, and therefore, above-mentioned USB interface can provide direct voltage can transmit data again simultaneously, with the effect that power supply and transmission data are provided.

Because above-mentioned USB interface has the characteristic that power supply is provided; To all portable electronic installations; Like MP 3 walkmans, mobile phone etc., it will be provided with originally and be used for carrying out with computer the USB interface of data sync, and most manufacturers are promptly borrowing USB interface that the characteristic of power supply can be provided; Making has the charger of USB interface to above-mentioned charge electronic devices, therefore now ubiquity electronic installation and the charger that charges with USB interface of all kinds arranged.

Yet some manufacturer hopes that still the consumer can buy the charger that the whole series are specific to electronic installation; Therefore can electronic installation with and exclusive charger on carry out following design; See also Fig. 5; Wherein, be can on this electronic installation, be provided with a USB interface 70, in order to charging circuit 71, a control circuit 72 and a switch 73 to this charge electronic devices; Wherein this charging circuit 71 is the V with this USB interface 70 _BUSContact is electrically connected, and this control circuit 72 is the D with this USB interface 70 ⁺Contact, D ^-Contact and this switch 73 is electrically connected, and in have a predeterminated voltage value, this predeterminated voltage value comprises a D ⁺An and D ^-Magnitude of voltage, and according to this D ⁺Contact, D ^-The voltage that contact received respectively with this D ⁺And D ^-Whether identical magnitude of voltage is and control the keying of this

switch

73, and 73 on this switch is connected between the ground contact of this power circuit 71 and this USB interface 70; With in the exclusive charger of above-mentioned electronic installation coupling a USB interface 80, the V of this USB interface 80 can be set equally then _BUSContact then can be received then ground connection of DC power supply ground contact, and its D ⁺Contact and D ^-Contact is then exported respectively should D ⁺And D ^-The D of magnitude of voltage ⁺And D ^-Voltage, the control circuit 73 in this electronic installation detects the D of its USB interface 70 ⁺And D ^-The D that contact received ⁺And D ^-Voltage and this D ⁺And D ^-When magnitude of voltage conforms to, i.e. this switch 73 is closed in control, and then makes this V _BUSContact and this ground contact are to these charging circuit 71 formation loops, to pass through 71 pairs of these charge electronic devices of this charging circuit; Therefore, be connected with this electronic installation as if USB interface 80, then the D of this non-exclusive charger with non-exclusive charger ⁺Contact and D ^-The D of contact output ⁺And D ^-Voltage can with this control circuit 72 in the D that builds ⁺And D ^-Magnitude of voltage is different, and makes these control circuit 72 controls break off this switch 73, makes this V _BUSContact, this ground contact and this charging circuit 71 can't constitute the loop, so charging circuit 71 can't be to charge electronic devices; Therefore, the user must buy the exclusive charger of this electronic installation could be to this charge electronic devices.

Yet electronic industry is flourishing now, and a people is no matter be that working or tourism all usually can carry a few electronic installation; And will be for to each charge electronic devices; Need carry several chargers carefully again, make and carry quite inconvenience, cause the user to bear; Therefore there is the consumer to be expected to have a kind of Universal USB charger that goes for multiple label more, reduces the burden of carrying a plurality of chargers.

Summary of the invention

Because above-mentioned existing USB charger can only be to the technological deficiency of the charge electronic devices of single label; The main purpose of the utility model is to propose a kind of Universal USB charger; Can let the user switch and be suitable for different label electronic installations, and reach adaptable across the effect of multiple label electronic installation.

Desiring to reach the employed major technique means of above-mentioned purpose is to make this Universal USB that charger is in order to have the charge electronic devices of a USB interface to one; And this electronic installation inside has the charging circuit that is connected with USB interface; This electronic installation also stores one group of predeterminated voltage value, and this USB charger includes:

One power circuit is to have a direct current voltage source and an earth terminal;

One USB interface is to include a V _BUSContact, a D ⁺Contact, a D ^-A contact and a ground contact, wherein this V _BUSContact is to be electrically connected with the direct voltage source of this power circuit, and this ground contact then is electrically connected with the earth terminal of this power circuit;

One output voltage handover module is to have a D ⁺An output and a D ^-Output, wherein this D ⁺Output and this D ^-Output be respectively with the D of this USB interface ⁺Contact and D ^-Contact connects, and this output voltage handover module comprises a plurality of predeterminated voltage values according to different label electronic installations and exports a D again ⁺A voltage and a D ^-The predeterminated voltage unit of voltage, this output voltage handover module comprise that also a changeable predeterminated voltage unit that lets wherein is with the D of its output ⁺Voltage and D ^-Voltage is respectively from D ⁺Output and this D ^-The switching interface of output output, wherein this switching interface connects this a plurality of predeterminated voltages unit.

In the preferred implementation, the switching interface of this output voltage handover module includes a D ⁺A selector switch and a D ^-Selector switch, wherein: this D ⁺Selector switch comprises an output connecting pin and a plurality of in order to obtain the D of this a plurality of predeterminated voltages unit output respectively ⁺The input pin of voltage, this D ⁺The output connecting pin of selector switch is the D that is electrically connected this output voltage handover module ⁺Output, this D ⁺A plurality of input pins of selector switch connect this a plurality of predeterminated voltages unit respectively; This D ^-Selector switch comprises an output connecting pin and a plurality of in order to obtain the D of this a plurality of predeterminated voltages unit output respectively ^-The input pin of voltage, this D ^-The output connecting pin of selector switch is electrically connected the D of this output voltage handover module ^-Output, this D ^-A plurality of input pins of selector switch connect this a plurality of predeterminated voltages unit respectively.

In the preferred implementation, this switching interface is one can make this D ⁺Selector switch and this D ^-Selector switch is operated action and the coupled switch of operate together of this switching interface with the user.

In the preferred implementation; Each predeterminated voltage unit of this output voltage handover module is to include two component piezoresistances; Each component piezoresistance is to comprise two to be series between direct voltage source and the earth terminal of this power circuit and to be series at the resistance of a connected node; Make direct voltage source pass through two electric resistance partial pressures of these a plurality of component piezoresistances respectively, the voltage on two connected nodes of each predeterminated voltage unit promptly is respectively this D ⁺Voltage and this D ^-Voltage.

Utilize above-mentioned technological means, can easily switch D ⁺Contact and D ^-The voltage of contact output comes corresponding various different label electronic installations, makes the charger of the utility model can be according to user's selection, and charges in order to the electronic installation to different labels, adaptable across multiple electronic installation.

Description of drawings

Fig. 1 is the utility model circuit block diagram;

Fig. 2 is the circuit block diagram of the utility model output voltage handover module;

Fig. 3 is the circuit diagram of the utility model predeterminated voltage module;

Fig. 4 uses sketch map for the utility model;

Fig. 5 is that existing electronic installation and charger use sketch map.

Embodiment

Below cooperate the preferred embodiment of graphic and the utility model, further setting forth the utility model is to reach the technological means that predetermined utility model purpose is taked.

The Universal USB charger that the utility model provided is in order to the charge electronic devices to multiple label, and the electronic installation of each label has the different preset magnitude of voltage in respectively, in order to as whether allowing the foundation of charger to charge electronic devices.

See also Fig. 1, above-mentioned Universal USB charger is to include:

One power circuit 10 is to have a direct current voltage source and an earth terminal, and this direct voltage source is a 5V direct voltage source in present embodiment;

One USB interface 20 is to include a V _BUSContact, a D ⁺Contact, a D ^-A contact and a ground contact, wherein this V _BUSContact is to be electrically connected with the direct voltage source of this power circuit 10, and this ground contact then is electrically connected with the earth terminal of this power circuit;

One output voltage handover module 30 is to have a D ⁺An output 301 and a D ^-Output 302, and include predeterminated voltage unit 31 and a switching interface 32, wherein this D of the predeterminated voltage value of the corresponding a plurality of label electronic installations of a plurality of difference ⁺Output 301 and this D ^-Output 302 be respectively with the D of this USB interface 20 ⁺Contact and D ^-Contact connects, and a D can be exported according to the predeterminated voltage value of its corresponding label electronic installation in each predeterminated voltage unit 31 ⁺A voltage and a D ^-Voltage, this switching interface are the operations according to the user, switch to let wherein a predeterminated voltage unit 31 with the D of its output ⁺Voltage 33 and D ^-Voltage 34 is respectively from D ⁺Output 301 and this D ^-Output 302 outputs.

Please further consult Fig. 2, in present embodiment, this switching interface 32 includes a D ⁺A selector switch 321 and a D ^-Selector switch 322, and this D ⁺Selector switch 321 and this D ^-Selector switch 322 respectively has a plurality of input pins and an output connecting pin; In present embodiment, this switching interface 32 can use a coupled switch (linked switch) to reach, and makes this D ⁺Selector switch 321 and this D ^-Selector switch 322 can be operated action and the operate together of this switching interface 32 with the user; This D ⁺The output connecting pin of selector switch 321 is the D that are electrically connected to this output voltage handover module 30 ⁺Output 301, and its a plurality of input pins are connected to this a plurality of predeterminated voltages unit 31 respectively to obtain the D of these a plurality of predeterminated voltages unit 31 outputs ⁺Voltage; This D ^-The output connecting pin of selector switch 322 then is electrically connected to the D of this output voltage handover module 30 ^-Output 302, and its a plurality of input pins are connected to this a plurality of predeterminated voltages unit 31 respectively to obtain the D of these a plurality of predeterminated voltages unit 31 outputs ^-Voltage; Each predeterminated voltage unit 31 is as shown in Figure 3 again; Be to include two component piezoresistances 311; Each component piezoresistance 311 is to comprise two to be series between 5V direct voltage source and the earth terminal of this power circuit 10 and to be series at the resistance 312 of a link node 33,34; Make the 5V direct voltage source pass through two resistance, 312 dividing potential drops of these a plurality of component piezoresistances 311 respectively, the voltage on two connected nodes 33,34 of each predeterminated voltage unit 31 is D ⁺Voltage and D ^-Voltage, this connected node the 33, the 34th connects this D respectively again ⁺Selector switch 321 and this D ^-The input pin of selector switch 322.Illustrate, build the predeterminated voltage value in supposing in the electronic installation of A label and comprise a D ⁺An and D ^-Magnitude of voltage is respectively 4.5V and 3.5V, and then the utility model produces the D of A label in order to dividing potential drop ⁺Two resistance 312 of voltage can be selected 1K Europe female (ohm) and 9K Europe mother respectively for use; And make the female resistance in 1K Europe be connected in the 5V direct voltage source; And the female grounding through resistance in 9K Europe, then the voltage on the connected node 33 between two resistance 312 that are in series is 4.5V, can be used as the D of corresponding A label ⁺Voltage; In like manner produce the D of A label in order to dividing potential drop ^-Two resistance 312 of voltage then can select for use 3K Europe mother and 7K Europe female, and make the female resistance in 3K Europe be connected to the 5V direct voltage source, and then the voltage on the connected node 34 between two resistance 312 that are in series is 3.5V, can be used as the D of corresponding A label ^-Voltage.

When the utility model uses, be can be as shown in Figure 4, the electronic installation of lifting the A label be an example, and the user only need be switched this switching interface 32, makes the D of predeterminated voltage unit 31 of the predeterminated voltage value of corresponding A label ⁺Voltage and D ^-Voltage is respectively from the D of this USB interface 20 ⁺Contact and D ^-Contact output, then the control circuit 72 in the electronic installation of A label can be respectively from the D of the USB interface 20 of the charger of the utility model ⁺Contact and D ^-Contact receives D ⁺Voltage and D ^-Voltage is judged D by this control circuit 72 ⁺Voltage and D ^-The D of the predeterminated voltage value of the electronic installation of voltage and A label ⁺And D ^-After magnitude of voltage conforms to, and then control this switch 73 and close, make the charging circuit 71 formation loops of direct voltage source, earth terminal and this electronic installation of charger power circuit 10, so this charging circuit 71 can operate with to charge electronic devices; In like manner, when the utility model was connected with other label electronic installations, the user made the D of USB interface 20 as long as operate this switching interface 32 ⁺Contact and D ^-Contact is exported the D of the predeterminated voltage value of corresponding label ⁺Voltage and D ^-Voltage can make this label electronic installation allow the charger of the utility model that it is charged.

In sum; The utility model USB charger has adaptable across the effect of the electronic installation of multiple label; The user be USB charger of portability to multiple charge electronic devices, must not carry a plurality of exclusive USB chargers, significantly reduce the burden that the user carries the USB charger.

The above only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Though the utility model discloses as above with preferred embodiment; Yet be not in order to limiting the utility model, anyly be familiar with the professional and technical personnel, in the scope that does not break away from the utility model technical scheme; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be the content that does not break away from the utility model technical scheme, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of the utility model technical scheme according to the technical spirit of the utility model.

Claims

1. Universal USB charger; In order to having the charge electronic devices of a USB interface to one, and this electronic installation inside has the charging circuit that is connected with USB interface, and this electronic installation also stores one group of predeterminated voltage value; It is characterized in that this USB charger includes:

2. Universal USB charger according to claim 1 is characterized in that the switching interface of this output voltage handover module includes a D ⁺A selector switch and a D ^-Selector switch, wherein: this D ⁺Selector switch comprises an output connecting pin and a plurality of in order to obtain the D of this a plurality of predeterminated voltages unit output respectively ⁺The input pin of voltage, this D ⁺The output connecting pin of selector switch is the D that is electrically connected this output voltage handover module ⁺Output, this D ⁺A plurality of input pins of selector switch connect this a plurality of predeterminated voltages unit respectively; This D ^-Selector switch comprises an output connecting pin and a plurality of in order to obtain the D of this a plurality of predeterminated voltages unit output respectively ^-The input pin of voltage, this D ^-The output connecting pin of selector switch is electrically connected the D of this output voltage handover module ^-Output, this D ^-A plurality of input pins of selector switch connect this a plurality of predeterminated voltages unit respectively.

3. Universal USB charger according to claim 2 is characterized in that, this switching interface is one can make this D ⁺Selector switch and this D ^-Selector switch is operated action and the coupled switch of operate together of this switching interface with the user.

4. according to the described Universal USB of each claim of claim 1 to 3 charger; It is characterized in that; Each predeterminated voltage unit of this output voltage handover module is to include two component piezoresistances; Each component piezoresistance is to comprise two to be series between direct voltage source and the earth terminal of this power circuit and to be series at the resistance of a connected node; Make direct voltage source pass through two electric resistance partial pressures of these a plurality of component piezoresistances respectively, the voltage on two connected nodes of each predeterminated voltage unit promptly is respectively this D ⁺Voltage and this D ^-Voltage.