CN202126598U - Automatic power-off device for USB power supplier - Google Patents
Automatic power-off device for USB power supplier Download PDFInfo
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- CN202126598U CN202126598U CN201120217231XU CN201120217231U CN202126598U CN 202126598 U CN202126598 U CN 202126598U CN 201120217231X U CN201120217231X U CN 201120217231XU CN 201120217231 U CN201120217231 U CN 201120217231U CN 202126598 U CN202126598 U CN 202126598U
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Abstract
An automatic power-off device for a USB power supplier is disclosed, which at least comprises a manual switch module, a relay, a high-frequency transformer, a PWM power supply main control module, a drive module, a signal filter module, a MCU main control module, a luminous indicating module and at least a USB power source output end. When the user presses the manual switch module, the relay is powered on so that electronic equipment connected with the USB power source output end can be charged and whether the electronic equipment uses current or not is judged according to an impulse filter signal output by the signal filter module through the MCU main control module so as to drive the relay to break or start the luminous indicating module to generate a light source. When the relay is broken, the power source is unable to be transferred to the USB power source output end so as to realize the purpose of automatic power-off, thereby, the utility model has the advantages of protecting environment, saving energy and power.
Description
Technical field
The utility model is relevant for a kind of auto-power-off device of USB charger, be meant especially a kind of when the electronic equipment that is connected does not need electricity consumption, the auto-power-off device of the USB charger that can stop power supply automatically.
Background technology
The charger construction of prior art is to be combined by a housing, a circuit board, an electrical plug and a power supply output unit; This circuit board is incorporated in this housing; This electrical plug is incorporated into this housing below, and electrically connects with this circuit board, and this power supply output unit is incorporated into this housing; And electrically connect with this circuit board, use for charging;
But because now a lot of mobile electronic device (for example mobile phone); For reduced volume, thus can many connectivity ports are shared, and the most common visible be that USB interface is also used as a power source charges mouth; Old-fashioned charger then can't be used for this type mobile electronic device; Therefore in response to this a kind of mobile electronic device, thus there is manufacturer to develop a kind of USB charger, so that this electronic equipment is inserted on this USB charger; And this USB charger can export external power source conversion to USB port on this mobile electronic device to, so that this mobile electronic device can charge;
Yet, when Once you begin charging, promptly can continue to supply power owing to this a kind of USB charger; Even this mobile electronic device charges electricity or no longer need charge the time; Only if the user detaches out the USB charger with this mobile electronic device, not so this USB charger can continue to provide power supply always, therefore will waste very much the power supply that does not need; So can cause energy dissipation; Along with the increase day by day of mobile electronic device, this energy dissipation also increases the weight of day by day simultaneously, therefore is badly in need of at present wanting a kind of technology to solve this problem.
Therefore,, when can not need electricity consumption, can stop power supply automatically, so should be a best solution in the electronic equipment that this connected if a kind of auto-power-off device of USB charger can be provided.
The utility model content
The purpose of the utility model promptly is to provide a kind of auto-power-off device of USB charger, is one when can not need electricity consumption in the electronic equipment that this connected, the auto-power-off device of the USB charger of the energy-conserving and environment-protective that can stop power supply automatically.
Can reach the auto-power-off device of a kind of USB charger of above-mentioned novel purpose, comprise: a Power Entry Module receives city's electric signal; A relay is connected with this Power Entry Module, and wherein whether the voltage imported of this Power Entry Module of this relay control can supply power; A hand switch module is connected with this Power Entry Module and this relay, and whether this hand switch module controls relay can be connected; A driver module is connected with this relay, and wherein this this relay of driver module driving is switched on or switched off; One first rectification module is connected with this relay, and wherein this first rectification module can be pulse direct current with the voltage commutation that this Power Entry Module is imported; One first filtration module is connected with this first rectification module, and wherein this first filtration module can change the rectification pulse wave direct current that this first rectification module is imported into galvanic current; A high-frequency transformer is connected with this first filtration module, and wherein this high-frequency transformer can convert the high voltage that this first filtration module is imported into low-voltage; An EMI absorbs module, is connected with this high-frequency transformer, and wherein this EMI absorbs module and can absorb the excessive voltage on this high-frequency transformer, can reduce electromagnetic interference (EMI); A voltage sampling module is connected with this high-frequency transformer, and wherein this voltage sampling module can be carried out voltage sampling with the voltage that this high-frequency transformer is exported; A PWM power supply main control module is connected with this voltage sampling module and high-frequency transformer, receives the sampled signal of voltage sampling module feedback, and accordings to the sampled signal control high-frequency transformer action that is received; A starting resistance is connected with this first filtration module and this PWM power supply main control module, and wherein this starting resistance can provide trigger voltage in this PWM power supply main control module, so that this PWM power supply main control module can come into operation; One second rectification module is connected with this high-frequency transformer, and wherein this second rectification module can be pulse direct current with the voltage commutation that this high-frequency transformer is exported; A signal filtering module is connected with this second rectification module, and wherein this signal filtering module can be filtered into the pulse bandwidth filtering signal with the pulse direct current that this second rectification module is exported; A MCU main control module; Be connected with this driver module and this signal filtering module; And this signal filtering module can be imported the pulse bandwidth filtering signal that this MCU main control module can be discerned; And this MCU main control module can judge whether to start this driver module by this pulse bandwidth filtering signal, to break off relay; One second filtration module is connected with this second rectification module, and wherein this second filtration module can change the rectification pulse wave direct current that this second rectification module is exported into galvanic current; A dividing potential drop networking module is connected with this second filtration module, and wherein this dividing potential drop networking module can offer the electronic equipment identification that is connected; And at least one USB power supply output module is connected with this dividing potential drop networking module and this electronic equipment, and this USB power supply output module can provide the power supply of this electronic equipment running.
In a preferred embodiment, this MCU main control module can connect a luminous indicating module, and the pulse bandwidth filtering signal that this MCU main control module can be exported by this signal filtering module, to judge whether to start this luminous indicating module.
In a preferred embodiment, this luminous indicating module is a light-emittingdiode.
The auto-power-off device of a kind of USB charger that the utility model provided when comparing each other with other prior aries, has more and gets the row advantage ready:
When the utility model can not need electricity consumption in the electronic equipment of the auto-power-off device that is inserted in this USB charger; The signal that can sense high-frequency transformer output changes; And after lasting a period of time, this relay of meeting automatic cutout is to reach the purpose of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the Organization Chart of the auto-power-off device of the utility model USB charger;
Fig. 2 is the auto-power-off device circuit diagram of USB charger of the auto-power-off device of the utility model USB charger; And
Fig. 3 is the automatic outage process flow diagram of the auto-power-off device of the utility model USB charger.
[main element symbol description]
1 civil power
The auto-power-off device of 2 USB chargers
201 Power Entry Modules
202 relays
203 driver modules
204 hand switch modules
205 first rectification modules
206 first filtration modules
207 high-frequency transformers
208 EMI absorb module
209 voltage sampling modules
210 PWM power supply main control modules
211 starting resistances
212 second rectification modules
213 signal filtering modules
214 MCU main control modules
215 second filtration modules
216 dividing potential drop networking modules
217 USB power supply output modules
218 luminous indicating modules
3 electronic equipments.
Embodiment
Relevant for the aforementioned of the utility model and other technology contents, characteristics and effect, in the following detailed description that cooperates with reference to graphic preferred embodiment, can clearly appear.
See also Fig. 1 and Fig. 2, Organization Chart and circuit diagram for the auto-power-off device of the utility model USB charger mainly comprise:
One Power Entry Module 201 is connected with this civil power 1, to receive the signal from civil power;
One relay 202 is connected with this Power Entry Module 201, and wherein whether this relay 202 supplies power in order to the voltage of controlling this Power Entry Module 201 and being imported;
One driver module 203 is connected with this relay 202, and this driver module 203 is switched on or switched off in order to drive this relay 202;
One manual switch module 204 is connected with this Power Entry Module 201 and this relay 202, these hand switch module 204 usefulness so that this relay 202 can connect, to supply power;
One first rectification module 205 is connected with this relay 202, and wherein this first rectification module 205 can be a pulse direct current with the voltage commutation that this Power Entry Module 201 is imported;
One first filtration module 206 is connected with this first rectification module 205, and wherein this first filtration module 206 can change the rectification pulse wave direct current that this first rectification module 205 is imported into galvanic current;
One high-frequency transformer 207 is connected with this first filtration module 206, and wherein this high-frequency transformer 207 can convert the high voltage that this first filtration module 206 is imported into low-voltage;
One EMI absorbs module 208, is connected with this high-frequency transformer 207, and wherein this EMI absorbs module 208 and can absorb the excessive voltage on this high-frequency transformer 207, so that reduce electromagnetic interference (EMI);
One voltage sampling module 209 is connected with this high-frequency transformer 207, and wherein this voltage sampling module 209 can be carried out voltage sampling with the voltage that this high-frequency transformer 207 is exported;
One PWM power supply main control module 210 is connected with this voltage sampling module 209 and high-frequency transformer 207, receives the sampling voltage of voltage sampling module 209, and according to voltage signal control high-frequency transformer 207 output LOW voltages that receive;
One starting resistance 211; Be connected with this first filtration module 206 and this PWM power supply main control module 210; Wherein this starting resistance 211 can provide a trigger voltage in this PWM power supply main control module 210, so that this PWM power supply main control module 210 can come into operation;
One second rectification module 212 is connected with this high-frequency transformer 207, and wherein this second rectification module 212 can be a pulse direct current with the voltage commutation that this high-frequency transformer 207 is exported;
One signal filtering module 213 is connected with this second rectification module 212, and wherein this signal filtering module 213 can be filtered into a pulse bandwidth filtering signal with the pulse direct current that this second rectification module 212 is exported;
One MCU main control module 214; Be connected with this driver module 203 and this signal filtering module 213; This signal filtering module 213 can be imported the pulse bandwidth filtering signal that this MCU main control module 214 can be discerned; And this MCU main control module 214 can judge whether to start this driver module 203 by this pulse bandwidth filtering signal, to break off relay 202;
One second filtration module 215 is connected with this second rectification module 212, and wherein this second filtration module 215 changes galvanic current in order to the rectification pulse wave direct current that this second rectification module 212 is exported;
One dividing potential drop networking module 216 is connected with this second filtration module 215, and wherein this dividing potential drop networking module 216 can offer this electronic equipment 3 identifications;
At least one USB power supply output module 217 is connected with this dividing potential drop networking module 216, to receive the power supply signal from dividing potential drop networking module 216; The USB joint of power supply subset 3 is connected, and this USB power supply output module 217 can provide the power supply of these electronic equipment 3 runnings.
Therefore, when normality, whole device is to be in the no power state; And after the user pressed this hand switch module 204, this relay 202 promptly can be connected, and the power supply that this civil power 1 is imported can be earlier through this relay 202; And through behind this first rectification module 205 and this first filtration module 206; Pass through this starting resistance 211 again,, produce a low-voltage with the control high-frequency transformer so that this PWM power supply main control module 210 comes into operation;
And behind these high-frequency transformer 207 beginning output voltages; Wherein too high voltage can be absorbed module 208 by this EMI and absorb; This high-frequency transformer 207 can be exported a voltage simultaneously; And feed back to this PWM power supply main control module 210 via this voltage sampling module 209, make the action of PWM power supply main control module 210 Sustainable Control high-frequency transformers; And this high-frequency transformer 207 also can be output in this electronic equipment 3 through these USB power supply output module 217 power supplies via this second rectification module 212, this second filtration module 215, this dividing potential drop networking module 216 at last.
In addition, this high-frequency transformer 207 can to export a pulse bandwidth filtering signal to this MCU main control module 214, make this MCU main control module 214 can carry out sensing again via this signal filtering module 213; When the electronic equipment 3 that is therefore connected when this USB power supply output module 217 has the electric current of use; The deration of signal that this MCU main control module 214 is sensed can be less than setting value; So this MCU main control module 214 can should be lighted by luminous indicating module 218, and keeps the unlatching of this relay 202 simultaneously; In addition; When this electronic equipment 3 did not re-use electric current, the pulse bandwidth filtering deration of signal that this MCU main control module 214 is sensed can be greater than setting value, so this MCU main control module 214 can should knock out by luminous indicating module 218; Simultaneously after MCU main control module 214 sensing pulse filtering signal width continue a period of time greater than setting value; Then can break off relay, and make auto-power-off device 2 outages of this USB charger, reach the purpose of energy-conserving and environment-protective.
What deserves to be mentioned is; This MCU main control module 214 can connect a luminous indicating module 218; And the pulse bandwidth filtering signal that this MCU main control module 214 can be exported by this signal filtering module 213; To judge whether starting this luminous indicating module 218, wherein this luminous indicating module 218 is a light-emittingdiode; This luminous indicating module 218 is inserted in the use power supply status of the electronic equipment 3 on this USB output module 217 in order to luminous demonstration in addition.
What deserves to be mentioned is; When the electronic equipment that is inserted in USB output module 217 3 need not be used electricity, the signal that this MCU main control module 214 can sense high-frequency transformer output changed, and after lasting a period of time; This relay 202 of meeting automatic cutout is to reach the purpose of energy-conserving and environment-protective.
See also Fig. 3, be the automatic outage process flow diagram of the auto-power-off device of the utility model USB charger, by knowing that its flow process is among the figure:
1. after the user presses this hand switch module, to open relay (301);
2. be 60 (302) by this MCU main control module setting-up time counting, and read the pulse bandwidth filtering signal (303) that this signal filtering module is imported again;
3. judge that whether the pulse bandwidth filtering deration of signal that this signal filtering module imported is less than setting value (304), if then light luminous indicating module (305), and the setting-up time counting is 60 (306); In addition,, then turn off this luminous indicating module (307), and this time counting is reduced 1 (308) if the pulse bandwidth filtering deration of signal that this signal filtering module is imported not is less than setting value;
4. whether the judgement time counting equals 0 (309), if then break off relay, so that the auto-power-off device of USB charger outage (310); If this time counting is not to be 0 second, then get back in the step 303, to read the signal that this signal filtering module is imported again.
The auto-power-off device of a kind of USB charger that the utility model provided when comparing each other with other prior aries, has more and gets the row advantage ready:
1. when the utility model can not need electricity consumption in the electronic equipment of the auto-power-off device that is inserted in this USB charger; The signal that can sense high-frequency transformer output changes; And after lasting a period of time, this relay of meeting automatic cutout is to reach the purpose of energy-conserving and environment-protective.
By the detailed description of above preferred embodiment, hope can be known the characteristic and spirit of describing the utility model more, and is not to come the category of the utility model is limited with the above-mentioned preferred embodiment that is disclosed.On the contrary, its objective is that hope can contain in the category of the claim that is arranged in the desire application of the utility model institute of various changes and tool equality.
Claims (3)
1. the auto-power-off device of a USB charger is characterized in that comprising:
A Power Entry Module receives city's electric signal;
A relay is connected with this Power Entry Module, and wherein whether the voltage imported of this Power Entry Module of this relay control can supply power;
A hand switch module is connected with this Power Entry Module and this relay, and whether this hand switch module controls relay can be connected;
A driver module is connected with this relay, and wherein this this relay of driver module driving is switched on or switched off;
One first rectification module is connected with this relay, and wherein this first rectification module can be pulse direct current with the voltage commutation that this Power Entry Module is imported;
One first filtration module is connected with this first rectification module, and wherein this first filtration module can change the rectification pulse wave direct current that this first rectification module is imported into galvanic current;
A high-frequency transformer is connected with this first filtration module, and wherein this high-frequency transformer can convert the high voltage that this first filtration module is imported into low-voltage;
An EMI absorbs module, is connected with this high-frequency transformer, and wherein this EMI absorbs module and can absorb the excessive voltage on this high-frequency transformer, can reduce electromagnetic interference (EMI);
A voltage sampling module is connected with this high-frequency transformer, and wherein this voltage sampling module can be carried out voltage sampling with the voltage that this high-frequency transformer is exported;
A PWM power supply main control module is connected with this voltage sampling module and high-frequency transformer, receives the sampled signal of voltage sampling module feedback, and accordings to the sampled signal control high-frequency transformer action that is received;
A starting resistance is connected with this first filtration module and this PWM power supply main control module, and wherein this starting resistance can provide trigger voltage in this PWM power supply main control module, so that this PWM power supply main control module can come into operation;
One second rectification module is connected with this high-frequency transformer, and wherein this second rectification module can be pulse direct current with the voltage commutation that this high-frequency transformer is exported;
A signal filtering module is connected with this second rectification module, and wherein this signal filtering module can be filtered into the pulse bandwidth filtering signal with the pulse direct current that this second rectification module is exported;
A MCU main control module; Be connected with this driver module and this signal filtering module; And this signal filtering module can be imported the pulse bandwidth filtering signal that this MCU main control module can be discerned; And this MCU main control module can judge whether to start this driver module by this pulse bandwidth filtering signal, to break off relay;
One second filtration module is connected with this second rectification module, and wherein this second filtration module can change the rectification pulse wave direct current that this second rectification module is exported into galvanic current;
A dividing potential drop networking module is connected with this second filtration module, and wherein this dividing potential drop networking module can offer the electronic equipment identification that is connected; And
At least one USB power supply output module is connected with this dividing potential drop networking module and this electronic equipment, and this USB power supply output module can provide the power supply of this electronic equipment running.
2. the auto-power-off device of USB charger as claimed in claim 1; It is characterized in that: this MCU main control module can connect a luminous indicating module; And the pulse bandwidth filtering signal that this MCU main control module can be exported by this signal filtering module, to judge whether to start this luminous indicating module.
3. the auto-power-off device of USB charger as claimed in claim 1 is characterized in that: this luminous indicating module is a light-emittingdiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120217231XU CN202126598U (en) | 2011-06-24 | 2011-06-24 | Automatic power-off device for USB power supplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120217231XU CN202126598U (en) | 2011-06-24 | 2011-06-24 | Automatic power-off device for USB power supplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202126598U true CN202126598U (en) | 2012-01-25 |
Family
ID=45489664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120217231XU Expired - Fee Related CN202126598U (en) | 2011-06-24 | 2011-06-24 | Automatic power-off device for USB power supplier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202126598U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271206A (en) * | 2021-05-12 | 2021-08-17 | 江苏云涌电子科技股份有限公司 | Signal identification circuit and method |
-
2011
- 2011-06-24 CN CN201120217231XU patent/CN202126598U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271206A (en) * | 2021-05-12 | 2021-08-17 | 江苏云涌电子科技股份有限公司 | Signal identification circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20120125 Termination date: 20180624 |