CN211606164U - Watchdog charging circuit and device - Google Patents
Watchdog charging circuit and device Download PDFInfo
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- CN211606164U CN211606164U CN202020603281.0U CN202020603281U CN211606164U CN 211606164 U CN211606164 U CN 211606164U CN 202020603281 U CN202020603281 U CN 202020603281U CN 211606164 U CN211606164 U CN 211606164U
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- charging
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- watchdog
- switch module
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Abstract
The utility model discloses a watchdog charging circuit and a device, which comprises a processing module and a switch module; the switch module is used for being connected in series between an external charging head and the mobile equipment to form a charging loop; the processing module is connected with the control end of the switch module and used for detecting the current value in the charging loop and controlling the on-off of the switch module according to the current value so as to realize the disconnection or the connection of the charging loop; compared with the prior art, the watchdog charging circuit provided by the utility model detects the current value in the charging circuit through the processing module, and controls the on-off of the switch module according to the current value, so as to realize the disconnection or the connection of the charging circuit; compared with the prior art, can remove the end and charge and break off or switch on between the head according to the current value size control that charges, can in time carry out the outage to the mobile device that is full of the electricity and handle, protect the battery of mobile device, prolong the practical life of battery.
Description
Technical Field
The utility model relates to a technical field that charges especially relates to a watchdog charging circuit and device.
Background
A mobile terminal is used for a daily life style, so that the mobile terminal becomes a necessity; the common living habit is that the mobile terminal is used in the daytime and is charged when sleeping at night; but the night time is long, the electric quantity of the mobile terminal is already fully charged within 3 hours, and the mobile terminal which is fully charged is continuously charged in the rest time; the mobile terminal battery needs to be charged for a long time only when used for the first few times, and if the battery is charged for a long time all the time, the service life of the mobile terminal battery is shortened; at present, in the prior art, a device capable of effectively controlling the charging time of a mobile terminal has not appeared.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects existing in the technology, the utility model provides a watchdog charging circuit and a device, which controls the on-off condition of a mobile terminal charging circuit by detecting the charging current in the charging circuit; the overcharge phenomenon in the long-time charging process is prevented, and the service life of the mobile terminal battery is prolonged.
In order to achieve the above object, the utility model provides a watchdog charging circuit, which comprises a processing module and a switch module; the switch module is used for being connected in series between an external charging head and the mobile equipment to form a charging loop; the processing module is connected with the control end of the switch module and used for detecting the current value in the charging loop and controlling the on-off of the switch module according to the current value so as to realize the disconnection or the connection of the charging loop.
The preferred scheme also comprises a power supply conversion module, wherein the input end of the power supply conversion module is connected with an external charging head, and the input end of the power supply conversion module is connected with the processing module; the voltage value input by the input end is converted into the working voltage value of the processing module.
Specifically, the power conversion module comprises a power conversion chip with the model number of AP 1117-33; the power conversion chip comprises an input pin and an output pin; the input pin of the power conversion chip is used for being electrically connected with an external charging head, and the output end of the power conversion chip is used for being electrically connected with an external moving end.
Specifically, the processing module comprises a processing chip, and the processing chip comprises a current sampling pin and an enabling pin; the sampling pin is used for being connected with the input end or the output end of the switch module, the enabling pin is connected with the control end of the switch module, and a signal for controlling the on-off of the switch module is output according to the input value of the sampling pin.
More specifically, the processing chip is an HR7P153 model chip.
In a preferred scheme, the switch module comprises a first branch circuit, the first branch circuit comprises a first MOS (metal oxide semiconductor) tube, a drain electrode of the first MOS tube is used for being electrically connected with an external charging positive electrode power head, a source electrode of the first MOS tube is used for being electrically connected with a negative electrode of the charging head, and a grid electrode of the first MOS tube is used for being connected with an output end of the processing module; and a first resistor is connected in series between the source electrode and the negative electrode of the charging head.
In a preferred embodiment, the switch module further comprises a second branch connected in parallel with the first branch; the second branch circuit comprises a second MOS tube, the drain electrode of the second MOS tube is used for being electrically connected with an external charging anode electric head, the source electrode of the second MOS tube is used for being electrically connected with the cathode of the charging head, and the grid electrode of the second MOS tube is used for being connected with the output end of the processing module; and a second resistor is connected in series between the source electrode and the negative electrode of the charging head.
In the preferred scheme, the input end of the detection module is electrically connected with a connection point of the switch module and the external mobile equipment, and the output end of the detection module is connected with the processing module; and transmitting a pulse signal generated when the moving end is electrically connected with the switch module to the processing module.
Preferably, the detection module comprises a triode, a base electrode of the triode is electrically connected with a connection point of the switch module and the external mobile equipment, an emitting electrode of the triode is connected with the ground, and a collecting electrode of the triode is connected with the input end of the processing module.
In order to achieve the above object, the utility model also provides a watchdog device, which comprises a shell; one end of the shell is provided with a plug which is electrically connected with an external charging head, the other end of the shell is provided with a slot which is electrically connected with the movable end, and a circuit board which is arranged in the shell; a watchdog charging circuit is arranged on the circuit board; and one end of the switch module is electrically connected with the plug, and the other end of the switch module is electrically connected with the slot.
The utility model has the advantages that:
1. the utility model provides a watchdog charging circuit, through the current value in processing module detection charging circuit to according to the size control switch module's of current value break-make, realize the disconnection or the switch-on of charging circuit; compared with the prior art, can remove the end and charge and break off or switch on between the head according to the current value size control that charges, can in time carry out the outage to the mobile device that is full of the electricity and handle, protect the battery of mobile device, prolong the practical life of battery.
2. The switch modules are arranged in parallel for multiple branches, so that the charging power of the charger is increased; and a quick charging function is supported.
3. The charging dog is electrically connected between the charging head and the mobile phone in a plug-in manner, and can be directly adapted to the existing charger as optional equipment in the charging process; the compatibility is strong.
Drawings
FIG. 1 is a block diagram of the structure relationship of the modules of the present invention;
FIG. 2 is a schematic view of the present invention in use;
FIG. 3 is a circuit diagram of the power conversion module of the present invention; (ii) a
FIG. 4 is a circuit diagram of a processing module according to the present invention;
fig. 5 is a circuit diagram of the switch module of the present invention;
fig. 6 is a view of the structure of the watchdog of the present invention.
The main element symbols are as follows:
1. a switch module; 2. a processing module; 3. a power conversion module; 4. a mobile phone; 5. a charging head; 6. a watchdog device; 7. a data line; 61. a slot; 62. a plug; u23 and a power conversion chip; u16, processing chip; EN-MA/EN-A, enable pin; IOUT-AD, sampling pin; q1, a first MOS tube; q3 and a second MOS tube; q2, triode.
Detailed Description
In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings.
As described in the background art, there is no device for protecting the battery of the mobile phone 4 during the charging process in the prior art; when the mobile phone 4 is charged for a long time at night, the service life of the battery of the mobile phone 4 is reduced, therefore, the utility model provides a watchdog charging circuit, which is shown in figure 1 and comprises a processing module 2 and a switch module 1; the switch module 1 is used for being connected in series between an external charging head 5 and the mobile equipment to form a charging loop; the processing module 2 is connected with the control end of the switch module 1 and used for detecting the current value in the charging loop and controlling the on-off of the switch module 1 according to the current value so as to realize the disconnection or connection of the charging loop.
Compared with the prior art, this practicality can remove the end and charge and break off or switch on between the head 5 according to the current value size control that charges, can in time carry out the outage to the mobile device that is full of the electricity and handle, protects the battery of mobile device, prolongs the practical life of battery.
In the embodiment, the mobile terminal includes a mobile phone 4, a tablet computer and an MP 4.
In this embodiment, when the processing module 2 detects that the charging current is less than 50mA or greater than 3A, the switch module 1 is controlled to be turned off, and the charging process of the mobile terminal is stopped; if the charging current is less than 50mA, the mobile phone 4 is indicated to be fully charged, and then the continuous charging can be stopped, so that the service life of the battery is prevented from being reduced due to over-charging; when the current is greater than 3A, indicating a short circuit or other risk, the circuit also needs to be opened immediately to protect the handset 4.
Referring to fig. 1 and 3, the device further includes a power conversion module 3, an input end of the power conversion module 3 is connected to an external charging head 5, and an input end is connected to the processing module 2; for converting the voltage value inputted from the input terminal into the working voltage value of the processing module 2.
Specifically, the power conversion module 3 comprises a power conversion chip U23 with the model number of AP 1117-33; the power conversion chip U23 comprises an input pin and an output pin; the input pin of the power conversion chip U23 is used to electrically connect with the external charging head 5, and the output terminal is used to electrically connect with the external mobile terminal.
In the present embodiment, the output voltage of the charging head 5 is typically 5.0V to 6.0V; since the operating voltage of the processing module 2 is 3.3V, the voltage reduction processing needs to be performed by the power conversion chip U23.
Referring to fig. 1 and 4, the processing module 2 includes A processing chip U16, the processing chip U16 includes A current sampling pin IOUT-AD and an enable pin EN-MA/EN-A; the sampling pin IOUT-AD is used for being connected with the input end or the output end of the switch module 1, the enabling pin EN-MA/EN-A is connected with the control end of the switch module 1, and A signal for controlling the on-off of the switch module 1 is output according to the input value of the sampling pin IOUT-AD.
In the present embodiment, the processing chip U16 is an HR7P153 model chip; the working voltage of the chip is provided by the power supply module.
Referring to fig. 1 and 5, the switch module 1 includes a first branch circuit, the first branch circuit includes a first MOS transistor Q1, a drain of the first MOS transistor Q1 is used for electrically connecting to an external charging positive terminal, a source of the first MOS transistor Q1 is used for electrically connecting to a negative terminal of the charging terminal 5, and a gate of the first MOS transistor Q1 is used for connecting to an output terminal of the processing module 2; and a first resistor is connected in series between the source electrode and the negative electrode of the charging head 5.
Specifically, the sampling pin IOUT-AD of the processing chip U16 is connected between the connection point of the first resistor and the source, and obtains the voltage value or the current value at this point.
In this embodiment, when the enable pin EN-MA/EN-A of the processing module 2 outputs A low level, the MOS transistor is turned on, the positive electrode of the charging head 5 is turned on with the negative electrode of the charging head 5, A complete charging loop is formed between the mobile phone 4 and the charging head 5, and the charging head 5 charges the mobile phone 4; when the enable pin EN-MA/EN-A outputs high level, the MOS tube is cut off, the charging loop between the mobile phone 4 and the charging head 5 is disconnected, and the charging head 5 stops charging the mobile phone 4.
Preferably, the switch module 1 further includes a second branch connected in parallel with the first branch; the second branch comprises a second MOS tube Q3, the drain of the second MOS tube Q3 is used for being electrically connected with an external charging positive electrode terminal, the source is used for being electrically connected with the negative electrode of the charging terminal 5, and the grid is used for being connected with the output end of the processing module 2; and a second resistor is connected in series between the source electrode and the negative electrode of the charging head 5.
In the embodiment, by arranging two parallel circuits, the maximum charging current value in the charging circuit is increased; the maximum charging power of 60W is supported, and various fast charging protocols are supported.
In this embodiment, when the switch adopts two branches, the processing chip U16 may control the on/off of the first MOS transistor Q1 or the second MOS transistor Q3 through one or two enable pins EN-MA/EN-A; the sampling pins IOUT-AD respectively sample the current of the two branches.
In the preferred scheme, the input end of the detection module is electrically connected with a connection point of the switch module 1 and external mobile equipment, and the output end of the detection module is connected with the processing module 2; and transmits a pulse signal generated when the moving end is electrically connected with the switch module 1 to the processing module 2.
Specifically, the detection module comprises a triode Q2, the base of the triode Q2 is electrically connected with the connection point of the switch module 1 and the external mobile equipment, the emitter is connected with the ground, and the collector is connected with the input end of the processing module 2; when the external mobile terminal is connected, a pulse signal is generated at the base electrode of the triode Q2, and the pulse signal enables the triode to be conducted; the processing module 2 obtains a low-level signal; i.e. it is detected that the handset 4 has been plugged in.
Referring to fig. 2 and 6, a watchdog arrangement 6 comprises a housing; one end of the shell is provided with a plug 62 used for being electrically connected with the external charging head 5, the other end of the shell is provided with a slot 61 used for being electrically connected with the moving end, and a circuit board arranged in the shell; a watchdog charging circuit is arranged on the circuit board; and one end of the switch module 1 is electrically connected with the plug 62, and the other end is electrically connected with the slot 61.
In this embodiment, the two ends of the watchdog device 6 are respectively a USB plug 62 and a USB slot 61; when the practical watchdog is needed, the data line 7 and the charging head 5 of the charger are pulled out, the plug 62 end of the watchdog is inserted into the charging head 5, and the data line 7 is inserted into the USB slot 61; the watchdog device 6 can be adapted to any charging; meanwhile, when the new mobile phone 4 is charged, the watchdog can be detached; when the old mobile phone 4 is charged, a watchdog is connected; can be selected autonomously.
The utility model has the advantages that:
1. the utility model provides a watchdog charging circuit, through the current value in processing module detection charging circuit to according to the size control switch module's of current value break-make, realize the disconnection or the switch-on of charging circuit; compared with the prior art, can remove the end and charge and break off or switch on between the head according to the current value size control that charges, can in time carry out the outage to the mobile device that is full of the electricity and handle, protect the battery of mobile device, prolong the practical life of battery.
2. The switch modules are arranged in parallel for multiple branches, so that the charging power of the charger is increased; and a quick charging function is supported.
3. The charging dog is electrically connected between the charging head and the mobile phone in a plug-in manner, and can be directly adapted to the existing charger as optional equipment in the charging process; the compatibility is strong.
The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.
Claims (10)
1. A watchdog charging circuit is characterized by comprising a processing module and a switch module; the switch module is used for being connected in series between an external charging head and the mobile equipment to form a charging loop; the processing module is connected with the control end of the switch module and used for detecting the current value in the charging loop and controlling the on-off of the switch module according to the current value so as to realize the disconnection or the connection of the charging loop.
2. The watchdog charging circuit of claim 1, further comprising a power conversion module, wherein an input terminal of the power conversion module is connected to an external charging head, and an input terminal of the power conversion module is connected to the processing module; the voltage value input by the input end is converted into the working voltage value of the processing module.
3. The watchdog charging circuit of claim 2, wherein the power conversion module comprises a power conversion chip of model AP 1117-33; the power conversion chip comprises an input pin and an output pin; the input pin of the power conversion chip is used for being electrically connected with an external charging head, and the output end of the power conversion chip is used for being electrically connected with an external moving end.
4. The watchdog charging circuit of claim 1, wherein the processing module comprises a processing chip, the processing chip comprising a current sampling pin and an enable pin; the sampling pin is used for being connected with the input end or the output end of the switch module, the enabling pin is connected with the control end of the switch module, and a signal for controlling the on-off of the switch module is output according to the input value of the sampling pin.
5. The watchdog charging circuit of claim 4, wherein the processing chip is an HR7P153 model chip.
6. The watchdog charging circuit of claim 1, wherein the switch module comprises a first branch, the first branch comprises a first MOS transistor, a drain of the first MOS transistor is configured to be electrically connected to an external positive charging terminal, a source of the first MOS transistor is configured to be electrically connected to a negative terminal of the charging terminal, and a gate of the first MOS transistor is configured to be connected to an output terminal of the processing module; and a first resistor is connected in series between the source electrode and the negative electrode of the charging head.
7. The watchdog charging circuit of claim 6, wherein the switch module further comprises a second branch in parallel with the first branch; the second branch circuit comprises a second MOS tube, the drain electrode of the second MOS tube is used for being electrically connected with an external charging anode electric head, the source electrode of the second MOS tube is used for being electrically connected with the cathode of the charging head, and the grid electrode of the second MOS tube is used for being connected with the output end of the processing module; and a second resistor is connected in series between the source electrode and the negative electrode of the charging head.
8. The watchdog charging circuit of claim 1, further comprising a detection module, wherein an input end of the detection module is electrically connected with a connection point of the switch module and an external mobile device, and an output end of the detection module is connected with the processing module; and transmitting a pulse signal generated when the moving end is electrically connected with the switch module to the processing module.
9. The watchdog charging circuit of claim 1, wherein the detection module comprises a transistor, a base of the transistor is electrically connected to a connection point of the switching module and the external mobile device, an emitter of the transistor is connected to ground, and a collector of the transistor is connected to the input of the processing module.
10. A watchdog arrangement comprising a housing; one end of the shell is provided with a plug which is electrically connected with an external charging head, the other end of the shell is provided with a slot which is electrically connected with the movable end, and a circuit board which is arranged in the shell; the watchdog charging circuit of any one of claims 1-9 is arranged on the circuit board; and one end of the switch module is electrically connected with the plug, and the other end of the switch module is electrically connected with the slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020603281.0U CN211606164U (en) | 2020-04-21 | 2020-04-21 | Watchdog charging circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020603281.0U CN211606164U (en) | 2020-04-21 | 2020-04-21 | Watchdog charging circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211606164U true CN211606164U (en) | 2020-09-29 |
Family
ID=72584090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020603281.0U Expired - Fee Related CN211606164U (en) | 2020-04-21 | 2020-04-21 | Watchdog charging circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211606164U (en) |
-
2020
- 2020-04-21 CN CN202020603281.0U patent/CN211606164U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200929 |