CN210273552U - USB double-port charger with interlocking control - Google Patents
USB double-port charger with interlocking control Download PDFInfo
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- CN210273552U CN210273552U CN201921394146.3U CN201921394146U CN210273552U CN 210273552 U CN210273552 U CN 210273552U CN 201921394146 U CN201921394146 U CN 201921394146U CN 210273552 U CN210273552 U CN 210273552U
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Abstract
The utility model discloses a USB double-port charger with interlocking control, which comprises a power supply conversion module, a first interlocking circuit, a second interlocking circuit, a first USB current-limiting identification module, a second USB current-limiting identification module, a first USB interface and a second USB interface; the power supply conversion module is used for converting 220V alternating current into 5V direct current, and the first interlocking circuit is electrically connected with the first USB current-limiting identification module; the second interlocking circuit is electrically connected with the second USB current-limiting identification module; the first USB current-limiting identification module and the second USB current-limiting identification module are electrically connected with the power conversion module, the first USB interface is electrically connected with the first USB current-limiting identification module, and the second USB interface is electrically connected with the second USB current-limiting identification module. When the charger works at a single port, the full power can be output, and the requirement of quick charging of a user is met. When the two ports work simultaneously, the two ports output half power, so that the total output power of the charger cannot exceed the rated power, and overload protection is triggered.
Description
Technical Field
The utility model relates to a charger technical field, in particular to take USB two port charger of interlocking control.
Background
Portable mobile devices, such as mobile phones or tablet computers, are increasing. With the development of science and technology and the improvement of the quality of life of people, people put forward higher demands on the charging of portable mobile equipment, and the traditional single-port USB output charger cannot meet the demands. At present, many manufacturers have introduced dual-port and multi-port USB charging devices, but most of the dual-port/multi-port USB charging devices have difficulty in solving the following problems at the same time:
(1) when a user uses only one interface, the rest interfaces are idle, and the USB charging device does not output full power, so that the output power redundancy of the USB charging device is easily overlarge, and the quick charging requirement of the user cannot be met.
(2) When a user uses a plurality of interfaces, all the interfaces are in a full power output state, so that the total output power of the USB charging equipment is easily caused to exceed the rated power, overload protection is triggered, and in severe cases, the temperature of the USB charging equipment is also caused to be overhigh, and fire is caused.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to solve the above-mentioned prior art not enough, provide a take two mouthful chargers of USB of interlocking control.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a USB double-port charger with interlocking control comprises a power supply conversion module, a first interlocking circuit, a second interlocking circuit, a first USB current-limiting identification module, a second USB current-limiting identification module, a first USB interface and a second USB interface;
the power supply conversion module is used for converting 220V alternating current into 5V direct current, and the first interlocking circuit is electrically connected with the first USB current-limiting identification module; the second interlocking circuit is electrically connected with the second USB current-limiting identification module; the first USB current-limiting identification module and the second USB current-limiting identification module are electrically connected with the power conversion module, the first USB interface is electrically connected with the first USB current-limiting identification module, and the second USB interface is electrically connected with the second USB current-limiting identification module.
Furthermore, the first interlock circuit comprises a resistor R1, a resistor R2, a resistor R3, a MOS transistor Q1 and a control signal STAT2, wherein one end of the resistor R1 is electrically connected with a 5V direct-current power supply, and the other end of the resistor R1 is electrically connected with the control signal STAT 2; the control signal STAT2 is electrically connected with the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is electrically connected with one end of the resistor R3, the source of the MOS transistor Q1 is electrically connected with the other end of the resistor R3, and the source of the MOS transistor Q1 is grounded; one end of the resistor R2 is electrically connected to the drain of the MOS transistor Q1, and the other end of the resistor R2 is electrically connected to the current-limiting threshold input pin of the first USB current-limiting identification module.
Further, the second interlock circuit includes a resistor R4, a resistor R5, a resistor R6, a MOS transistor Q2 and a control signal STAT1, one end of the resistor R4 is electrically connected to the 5V dc power supply, the other end of the resistor R4 is electrically connected to the control signal STAT1, the control signal STAT1 is electrically connected to the gate of the MOS transistor Q2, the drain of the MOS transistor Q2 is electrically connected to one end of the resistor R6, the source of the MOS transistor Q2 is electrically connected to the other end of the resistor R6, the source of the MOS transistor Q2 is grounded, one end of the resistor R5 is electrically connected to the drain of the MOS transistor Q2, and the other end of the resistor R5 is electrically connected to the current-limiting threshold input pin of the second USB current-limiting identification module.
Further, the control signal STAT1 is at a high level when the first USB interface is idle, and the control signal STAT1 is at a low level when the first USB interface is active.
Further, the control signal STAT2 is at a high level when the second USB interface is idle, and the control signal STAT2 is at a low level when the second USB interface is active.
Furthermore, the USB current-limiting identification module further comprises a first over-temperature protection module, and the first over-temperature protection module is electrically connected with the enabling input pin of the first USB current-limiting identification module.
Furthermore, the first over-temperature protection module comprises a thermistor RT1 and a resistor RT2, one end of the thermistor RT1 is electrically connected with the 5V power supply, the other end of the thermistor RT1 is electrically connected with one end of the resistor RT2, the other end of the thermistor RT1 is electrically connected with the enable input pin of the first USB current-limiting identification module, and the other end of the resistor RT2 is grounded.
Furthermore, the USB current-limiting identification module also comprises a second over-temperature protection module, and the second over-temperature protection module is electrically connected with the enable input pin of the second USB current-limiting identification module.
Further, the second over-temperature protection module comprises a thermistor RT3 and a resistor RT4, one end of the thermistor RT3 is electrically connected to the 5V power supply, the other end of the thermistor RT3 is electrically connected to one end of the resistor RT4, and the other end of the thermistor RT4 is electrically connected to the enable input pin of the second USB current-limiting identification module 5.
The utility model has the advantages that: the utility model provides a take interlocking control's two port chargers of USB adjusts the output of first USB interface and second USB interface through setting up first interlocking circuit and second interlocking circuit, guarantees when single mouthful of work that USB battery charging outfit can full power output, satisfies the requirement that the user charges fast. When the two ports work simultaneously, the first USB interface and the second USB interface both output half power, so that the total output power of the USB charging equipment is ensured not to exceed the rated power, and overload protection is further triggered. The USB double-buckle charger has a simple circuit structure, adopts universal devices, is low in price, and can be widely applied to various charger occasions.
Drawings
Fig. 1 is a block diagram of a USB dual port charger with interlock control according to an embodiment of the present invention;
fig. 2 is a circuit diagram of the USB dual port charger with interlock control shown in fig. 1.
The intelligent USB temperature control device comprises a power conversion module 1, a first interlocking circuit 2, a second interlocking circuit 3, a first USB current-limiting identification module 4, a second USB current-limiting identification module 5, a first USB interface 6, a second USB interface 7, a first over-temperature protection module 8 and a second over-temperature protection module 9.
Detailed Description
The technical solution of the present invention will be further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, a USB dual-port charger with interlock control includes a power conversion module 1, a first interlock circuit 2, a second interlock circuit 3, a first USB current-limiting identification module 4, a second USB current-limiting identification module 5, a first USB interface 6, and a second USB interface 7;
the power supply conversion module 1 is used for converting 220V alternating current into 5V direct current, and the first interlocking circuit 2 is electrically connected with the first USB current-limiting identification module 4; the second interlock circuit 3 is electrically connected with the second USB current-limiting identification module 5; the first USB current-limiting identification module 4 and the second USB current-limiting identification module 5 are electrically connected with the power conversion module 1, the first USB interface 6 is electrically connected with the first USB current-limiting identification module 4, and the second USB interface 7 is electrically connected with the second USB current-limiting identification module 5.
The utility model provides a take interlocking control's two port chargers of USB, including power conversion module 1, first interlocking circuit 2, second interlocking circuit 3, first USB current-limiting identification module 4, second USB current-limiting identification module 5, first USB interface 6 and second USB interface 7. Wherein the first interlock circuit 2 is electrically connected with the first USB current-limiting identification module 4; second interlock circuit 3 and second USB current-limiting identification module 5 electric connection, through first USB current-limiting identification module 4 and second USB current-limiting identification module 5 discernment first USB interface 6 and the operating condition of second USB interface 7 respectively, and convey to first interlock circuit 2 and second interlock circuit 3, first interlock circuit 2 and second interlock circuit 3 convert high level or low level, thereby adjust the output power of first USB interface 6 and second USB interface 7, guarantee when the single port work, the USB charger can full power output, satisfy the requirement that the user charges fast. When the two ports work simultaneously, the first USB interface 6 and the second USB interface 7 both output half power, so that the total output power of the USB charger cannot exceed the rated power, and overload protection is triggered.
The USB double-buckle charger has a simple circuit structure, adopts universal devices, is low in price, and can be widely applied to various charger occasions.
Further, the first interlock circuit 2 includes a resistor R1, a resistor R2, a resistor R3, a MOS transistor Q1, and a control signal STAT2, one end of the resistor R1 is electrically connected to the 5V dc power supply, and the other end of the resistor R1 is electrically connected to the control signal STAT 2; the control signal STAT2 is electrically connected with the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is electrically connected with one end of the resistor R3, the source of the MOS transistor Q1 is electrically connected with the other end of the resistor R3, and the source of the MOS transistor Q1 is grounded; one end of the resistor R2 is electrically connected to the drain of the MOS transistor Q1, and the other end of the resistor R2 is electrically connected to the current-limiting threshold input pin of the first USB current-limiting identification module 4.
Further, the second interlock circuit 3 includes a resistor R4, a resistor R5, a resistor R6, a MOS transistor Q2 and a control signal STAT1, one end of the resistor R4 is electrically connected to the 5V dc power supply, the other end of the resistor R4 is electrically connected to the control signal STAT1, the control signal STAT1 is electrically connected to the gate of the MOS transistor Q2, the drain of the MOS transistor Q2 is electrically connected to one end of the resistor R6, the source of the MOS transistor Q2 is electrically connected to the other end of the resistor R6, the source of the MOS transistor Q2 is grounded, one end of the resistor R5 is electrically connected to the drain of the MOS transistor Q2, and the other end of the resistor R5 is electrically connected to the current-limiting threshold input pin of the second USB current-limiting identification module 5.
In case the first USB interface 6 is not connected to any load, the control signal STAT1 will output a high level. At this time, the MOS transistor Q2 is in a conducting state, the resistor R6 is equivalent to being short-circuited, and since one end of the resistor R5 is electrically connected to the current-limiting threshold input pin of the second USB current-limiting identification module 5, the output power of the second USB current-limiting identification module 5 is determined by the resistance of the resistor R5. By setting the resistance value of R5, the output power of the second USB interface 7 can be set to full power output, e.g. 5V2A, to ensure that the mobile electronic device can be charged quickly through the second USB interface 7. After the first USB interface 6 is connected to the load, the control signal STAT1 will output a low level. At this time, the MOS transistor Q2 will be in the off state, the resistor R5 and the resistor R6 form a series connection, and the output power of the second USB current-limiting identification module 5 will be determined by the total resistance of the resistor R5 and the resistor R6. By setting the resistance values of the resistor R5 and the resistor R6, the output power of the first USB interface 6 can be set to be half of the full power, for example, 5V1A, so as to ensure that the total output power of the first USB interface 6 and the second USB interface 7 does not exceed the rated value when the second USB interface 7 is also in the operating state.
Similarly, in the case where the second USB interface 7 is not connected to any load, the control signal STAT2 will output a high level. At this time, the MOS transistor Q1 is in a conducting state, the resistor R3 is equivalent to being short-circuited, and since one end of the resistor R2 is electrically connected to the current-limiting threshold input pin of the first USB current-limiting identification module 4, the output power of the first USB current-limiting identification module 4 is determined by the resistance of the resistor R2. By setting the resistance value of R2, the output power of the first USB interface 6 can be set to full power output, e.g. 5V2A, to ensure that the mobile electronic device can be charged quickly through the first USB interface 6. After the second USB interface 7 is connected to the load, the control signal STAT2 will output a low level. At this time, the MOS transistor Q1 will be in the off state, the resistor R2 and the resistor R3 form a series connection, and the output power of the first USB current-limiting identification module 4 will be determined by the total resistance of the resistor R2 and the resistor R3. By setting the resistance values of the resistor R2 and the resistor R3, the output power of the second USB interface 7 can be set to be half of the full power, for example, 5V1A, so as to ensure that the total output power of the first USB interface 6 and the second USB interface 7 does not exceed the rated value when the first USB interface 6 is also in the operating state.
For example, the first current-limiting identification module and the second current-limiting identification module are selected as the USB current-limiting chip PL2700, and the resistances of the resistor R2, the resistor R3, the resistor R5 and the resistor R6 are set to 3.4K Ω, respectively, so that when the user charges the mobile electronic device by using only the first USB interface 6 or the second USB interface 7, the output power of the first USB interface 6 or the second USB interface 7 is 5V2A, and the total output power is 10W. When the user uses the first USB interface 6 and the second USB interface 7 to charge the mobile electronic device, the output power of the first USB interface 6 and the second USB interface 7 is 5V1A, and the total output power is also 10W.
The utility model discloses a charger is not limited to two port output, can extend 3 or above USB interface with it. According to the quantity of the USB interfaces, the USB current-limiting chips and the control signals with equal quantity are set, then the serial resistors with equal quantity and equal resistance are connected to the current-limiting threshold input pins of the USB current-limiting chips, the control signals are used for carrying out interlocking control on the USB current-limiting chips, full power output of the USB charging equipment during single-port working can be guaranteed, half power output of each USB interface is achieved during two-port working, output power of each USB interface is reduced progressively during multi-port working, the requirement of quick charging of a user is met, and meanwhile the total output power of the USB charging equipment cannot exceed rated power.
Further, the control signal STAT1 is at a high level when the first USB interface 6 is idle, and the control signal STAT1 is at a low level when the first USB interface 6 is active.
When the first USB interface 6 is idle, that is, when the first USB interface 6 is not connected to any load, the control signal STAT1 is at a high level, so that the second USB interface 7 can quickly charge the mobile electronic device; when the first USB interface 6 is in operation, the control signal STAT1 is at a low level, so that the total output power of the first USB interface 6 and the second USB interface 7 is lower than or equal to the rated total output power, thereby ensuring the safety of the charger. The high level or the low level of the control signal STAT1 can be generated by the first USB current-limiting identification module 4 itself, or can be obtained by conversion of an external current and voltage detection circuit; the external current and voltage detection circuit enables the control signal STAT1 to output a high level or a low level by detecting that the first USB interface 6 is in an idle state or a working state.
Further, the control signal STAT2 is at a high level when the second USB interface 7 is idle, and the control signal STAT2 is at a low level when the second USB interface 7 is active.
When the second USB interface 7 is idle, that is, when the second USB interface 7 is not connected to any load, the control signal STAT2 is at a high level, so that the first USB interface 6 can quickly charge the mobile electronic device; when the second USB interface 7 is in operation, the control signal STAT2 is at a low level, so that the total output power of the first USB interface 6 and the second USB interface 7 is lower than or equal to the rated total output power, thereby ensuring the safety of the charger. The high level or the low level of the control signal STAT2 may be generated by the second USB current-limiting identification module 5 itself, or may be obtained by conversion of an external current and voltage detection circuit. The external current and voltage detection circuit enables the control signal STAT2 to output a high level or a low level by detecting that the second USB interface 7 is in an idle state or a working state.
Furthermore, the USB current-limiting identification device further comprises a first over-temperature protection module 8, wherein the first over-temperature protection module 8 is electrically connected with an enabling input pin of the first USB current-limiting identification module 4.
A first over-temperature protection module 8 is provided for protecting the first USB interface 6. The first over-temperature protection module 8 is electrically connected with the enable input pin of the first USB current-limiting identification module 4, and the first over-temperature protection module 8 controls the first USB current-limiting identification module 4 to stop working under the abnormal conditions of short circuit or poor contact and the like output by the first USB interface 6, so that the first USB interface 6 is protected.
Further, the first over-temperature protection module 8 includes a thermistor RT1 and a resistor RT2, one end of the thermistor RT1 is electrically connected to the 5V power supply, the other end of the thermistor RT1 is electrically connected to one end of the resistor RT2, the other end of the thermistor RT1 is electrically connected to the enable input pin of the first USB current-limiting identification module 4, and the other end of the resistor RT2 is grounded.
The first USB current-limiting identification module 4 is an existing general-purpose circuit, and the first USB current-limiting identification module 4 employs a USB current-limiting chip, such as PL2700 or the like. Thermistor RT1 is a positive temperature coefficient thermistor whose resistance increases with increasing temperature. The other end of the thermistor RT1 is connected to an enable input pin of the first USB current-limiting identification module 4, and is used to control the operating state of the first USB current-limiting identification module 4. When the first USB interface 6 outputs an abnormal state such as a short circuit or a poor contact, the resistance of the thermistor RT1 increases due to a temperature increase, and when the resistance increases to a certain degree, the first USB current-limiting identification module 4 is controlled to stop working. The resistance value of the resistor RT2 is reasonably set, so that the first USB interface 6 can be protected from over-temperature.
Furthermore, the USB current-limiting identification device further comprises a second over-temperature protection module 9, wherein the second over-temperature protection module 9 is electrically connected with an enabling input pin of the second USB current-limiting identification module 5.
A second over-temperature protection module 9 is provided for protecting the second USB interface 7. The second over-temperature protection module 9 is electrically connected with an enable input pin of the second USB current-limiting identification module 5, and the second over-temperature protection module 9 controls the second USB current-limiting identification module 5 to stop working under the abnormal conditions of short circuit or poor contact and the like output by the second USB interface 7, so as to protect the second USB interface 7.
Further, the second over-temperature protection module 9 includes a thermistor RT3 and a resistor RT4, one end of the thermistor RT3 is electrically connected to the 5V power supply, the other end of the thermistor RT3 is electrically connected to one end of the resistor RT4, and the other end of the thermistor RT4 is electrically connected to the enable input pin of the second USB current-limiting identification module 5.
The second USB current-limiting identification module 5 is an existing general-purpose circuit, and the second USB current-limiting identification module 5 employs a USB current-limiting chip, such as PL2700 or the like. Thermistor RT3 is a positive temperature coefficient thermistor whose resistance increases with increasing temperature. The other end of the thermistor RT3 is connected to an enable input pin of the second USB current-limiting identification module 5, and is used to control the operating state of the second USB current-limiting identification module 5. When the second USB interface 7 outputs an abnormal state such as a short circuit or a poor contact, the resistance of the thermistor RT3 increases due to a temperature increase, and when the resistance increases to a certain degree, the second USB current-limiting identification module 5 is controlled to stop working. The resistance value of the resistor RT4 is reasonably set, so that over-temperature protection can be provided for the second USB interface 7.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. A USB double-port charger with interlocking control is characterized by comprising a power supply conversion module, a first interlocking circuit, a second interlocking circuit, a first USB current-limiting identification module, a second USB current-limiting identification module, a first USB interface and a second USB interface;
the power supply conversion module is used for converting 220V alternating current into 5V direct current, and the first interlocking circuit is electrically connected with the first USB current-limiting identification module; the second interlocking circuit is electrically connected with the second USB current-limiting identification module; the first USB current-limiting identification module and the second USB current-limiting identification module are electrically connected with the power conversion module, the first USB interface is electrically connected with the first USB current-limiting identification module, and the second USB interface is electrically connected with the second USB current-limiting identification module.
2. The USB dual-port charger with the interlocking control as claimed in claim 1, wherein the first interlocking circuit comprises a resistor R1, a resistor R2, a resistor R3, a MOS transistor Q1 and a control signal STAT2, one end of the resistor R1 is electrically connected with a 5V DC power supply, and the other end of the resistor R1 is electrically connected with the control signal STAT 2; the control signal STAT2 is electrically connected to the gate of the MOS transistor Q1, the drain of the MOS transistor Q1 is electrically connected to one end of the resistor R3, the source of the MOS transistor Q1 is electrically connected to the other end of the resistor R3, and the source of the MOS transistor Q1 is grounded; one end of the resistor R2 is electrically connected with the drain of the MOS transistor Q1, and the other end of the resistor R2 is electrically connected with the current-limiting threshold input pin of the first USB current-limiting identification module.
3. The USB dual-port charger with the interlock control according to claim 1, wherein the second interlock circuit comprises a resistor R4, a resistor R5, a resistor R6, a MOS transistor Q2 and a control signal STAT1, one end of the resistor R4 is electrically connected to a 5V DC power supply, the other end of the resistor R4 is electrically connected to the control signal STAT1, the control signal STAT1 is electrically connected to the gate of the MOS transistor Q2, the drain of the MOS transistor Q2 is electrically connected to one end of the resistor R6, the source of the MOS transistor Q2 is electrically connected to the other end of the resistor R6, the source of the MOS transistor Q2 is grounded, one end of the resistor R5 is electrically connected to the drain of the MOS transistor Q2, and the other end of the resistor R5 is electrically connected to the current-limiting threshold input pin of the second USB current-limiting identification module.
4. The USB dual-port charger with the interlock control as claimed in claim 3, wherein the control signal STAT1 is high when the first USB interface is idle, and the control signal STAT1 is low when the first USB interface is active.
5. The USB dual-port charger with the interlock control as claimed in claim 2, wherein the control signal STAT2 is high when the second USB interface is idle, and the control signal STAT2 is low when the second USB interface is active.
6. The USB dual-port charger with the interlocking control function according to claim 1, further comprising a first over-temperature protection module, wherein the first over-temperature protection module is electrically connected with an enable input pin of the first USB current-limiting identification module.
7. The USB dual-port charger with the interlocking control function as claimed in claim 6, wherein the first over-temperature protection module comprises a thermistor RT1 and a resistor RT2, one end of the thermistor RT1 is electrically connected to a 5V power supply, the other end of the thermistor RT1 is electrically connected to one end of the resistor RT2, the other end of the thermistor RT1 is electrically connected to an enable input pin of the first USB current-limiting identification module, and the other end of the resistor RT2 is grounded.
8. The USB dual-port charger with the interlocking control function according to claim 1, further comprising a second over-temperature protection module, wherein the second over-temperature protection module is electrically connected to an enable input pin of the second USB current-limiting identification module.
9. The USB dual-port charger with the interlocking control function as claimed in claim 8, wherein the second over-temperature protection module comprises a thermistor RT3 and a resistor RT4, one end of the thermistor RT3 is electrically connected to a 5V power supply, the other end of the thermistor RT3 is electrically connected to one end of the resistor RT4, and the other end of the thermistor RT4 is electrically connected to an enable input pin of the second USB current-limiting identification module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921394146.3U CN210273552U (en) | 2019-08-26 | 2019-08-26 | USB double-port charger with interlocking control |
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| CN201921394146.3U CN210273552U (en) | 2019-08-26 | 2019-08-26 | USB double-port charger with interlocking control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429688A (en) * | 2019-08-26 | 2019-11-08 | 吉安伊戈尔电气有限公司 | A kind of USB twoport charger of the mutual lock control of band |
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2019
- 2019-08-26 CN CN201921394146.3U patent/CN210273552U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429688A (en) * | 2019-08-26 | 2019-11-08 | 吉安伊戈尔电气有限公司 | A kind of USB twoport charger of the mutual lock control of band |
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