CN207588494U - A kind of portable Android mainboard and its electric power management circuit - Google Patents
A kind of portable Android mainboard and its electric power management circuit Download PDFInfo
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- CN207588494U CN207588494U CN201721618419.9U CN201721618419U CN207588494U CN 207588494 U CN207588494 U CN 207588494U CN 201721618419 U CN201721618419 U CN 201721618419U CN 207588494 U CN207588494 U CN 207588494U
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- power management
- rechargeable battery
- electric power
- power supply
- circuit
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Abstract
The utility model is related to a kind of portable Android mainboard and its electric power management circuits, the Android mainboard includes main control unit, multiple functional units, electric power management circuit, the electric power management circuit includes power management chip, power supply adaptor, rechargeable battery, charge control module, when having mains supply access, the power supply adaptor is powered for the Android main board system, the charge control module is used to charge to the rechargeable battery, the power management chip includes power supply switch circuit, when no mains supply accesses, power supply is switched to the rechargeable battery and powered by the power supply switch circuit, the charge control module is in a dormant state, reduce kwh loss.It when there is no mains supply input, is powered by the rechargeable battery for the main control unit and each functional unit, makes the electronic product easy to carry to outdoor or a variety of occasions use.
Description
Technical field
The utility model is related to equipment power supply power supply technique fields, and in particular to a kind of portable Android mainboard and its power supply
Manage circuit.
Background technology
With the extensive use of various medium equipment, people need to carry or use electronic product outdoors, due to
Using RK3188 chips as Android mainboard, can support large screen display and touch function and WIFI, bluetooth, USB accesses,
The functions such as TF card are largely used in the existing media device in market, but this chip needs 12V power supplys to power, to above-mentioned
The carrying of media device and outdoor use bring many constant.
Utility model content
In view of this, it is necessary to which a kind of simple in structure, the portable Android mainboard and its power management that are easily achieved are provided
Circuit.
A kind of electric power management circuit of portable Android mainboard, the Android mainboard include main control unit, are respectively connected to
Multiple functional units, the electric power management circuit of the main control unit, the electric power management circuit include power management chip, power supply
Adapter, rechargeable battery, charge control module, the power supply adaptor are connected to mains supply and complete AC/DC conversions, be used for
Power when mains supply is accessed to the Android main board system, charge control mould difference block and the power supply adaptor and
The rechargeable battery connection, charges when there is mains supply access to the rechargeable battery, the power management chip packet
Power supply switch circuit is included, the power supply switch circuit is connected to the power supply adaptor and the rechargeable battery, for described
Switching between power supply adaptor power supply circuit and the rechargeable battery power supply circuit.
Further, the main control unit uses RK3188 chips.
Further, the multiple functional unit include touch screen, audio frequency and video output module, WIFI/ bluetooth modules,
USB interface modules, memory/flash memory module, each function module are respectively connected to the main control unit, are used to implement movement
The corresponding function of terminal.
Further, the power management chip is connected to the main control unit, to the main control unit and each work(
Energy unit power supply, and report the power supply adaptor and the rechargeable battery electric power thus supplied to the main control unit.
Further, the charge control module includes charge controlling chip and charge control peripheral circuit, the charging
Controlling chip, the charge controlling chip is connected to the rechargeable battery using CN3703 chips, described can be filled for controlling
The charging process of battery.
Further, the charge control peripheral circuit includes charging monitoring circuit and charge status indicating light, connects respectively
The rechargeable battery is connected to, for detecting the charging current of the rechargeable battery and charged state.
Further, the charge controlling chip is equipped with VCC pins, and the VCC pins are connected to the power supply adaptor.
Further, the charge controlling chip is equipped with DRV pins, and the DRV pins are connected to the rechargeable battery.
Further, the charge controlling chip is equipped with CHRG pins, and the CHRG pins are connected to the charging monitoring
Circuit.
Further, the charge controlling chip is equipped with DONE pins, and the DONE pins are connected to the charged state
Indicator light.
And a kind of portable Android mainboard, including main control unit, it is connected to multiple functions of the main control unit
Unit and such as features described above any one of them electric power management circuit.
In above-mentioned portable Android mainboard and its electric power management circuit, by that can be filled described in charge control module monitoring
The voltage of battery, when voltage is less than set threshold value, the charge control module controls the rechargeable battery charging,
After charging, the charge control module internal transistor shutdown exports high-impedance state.When input voltage can be filled less than described
During electric cell voltage, the charge control module reduces kwh loss automatically into sleep state.When there is no mains supply input
When, it is powered by the rechargeable battery for the main control unit and each functional unit, makes the electronic product easy to carry to family
Outer or a variety of occasions use.
Description of the drawings
Fig. 1 is the portable Android mainboard of the utility model embodiment and its structure diagram of electric power management circuit.
Fig. 2 is that the portable Android mainboard of the utility model embodiment and its power management function of electric power management circuit show
It is intended to.
Fig. 3 is the portable Android mainboard of the utility model embodiment and its power management chip of electric power management circuit
ACT8846 electrical block diagrams.
Fig. 4 is the portable Android mainboard of the utility model embodiment and its charge controlling chip of electric power management circuit
CN3703 electrical block diagrams.
Specific embodiment
The utility model is described in detail below with reference to specific embodiments and the drawings.
It please refers to Fig.1, Fig. 2, Fig. 3 and Fig. 4, a kind of portable Android mainboard and its electric power management circuit, the peace is shown
Tall and erect mainboard 100 includes main control unit 10, multiple functional units 20, electric power management circuit 30, and the electric power management circuit 30 includes
Power management chip 31, power supply adaptor 32, rechargeable battery 33, charge control module 34；The power supply adaptor 32 connects
AC/DC conversions are completed to mains supply, for the Android main board system being given to power when mains supply accesses, the charging control
Molding block 34 is connect with the power supply adaptor 32 and the rechargeable battery 33, during for there is mains supply access to it is described can
Rechargeable battery 33 charges, and the power management chip 31 includes power supply switch circuit 311, and the power supply switch circuit 311 connects
To the power supply adaptor 32 and the rechargeable battery 33, for 32 power supply circuit of power supply adaptor and described chargeable
Switching between 33 power supply circuit of battery.When having mains supply access, from the power supply adaptor 32 to the Android mainboard system
System power supply, while charge to the rechargeable battery 33；When no mains supply accesses, the power supply switch circuit 311 will be electric
Source is switched to the rechargeable battery 33 and powers, and the charge control module 34 is in a dormant state.
In the present embodiment, the main control unit 10 uses RK3188 chips, and the power management chip 31 uses
ACT8846QM460 chips, the charge controlling chip 35 use CN3703 chips.
The main control unit RK3188 chips are the cores of whole system, are completed to touch display screen, gravity sensor, temperature
Spend each function modules such as sensor, audio frequency and video output module, WIFI/ bluetooth modules, usb interface module, memory/flash memory module
20 control is used to implement the corresponding function of mobile terminal.
Further, the power management chip ACT8846 is connected to the main control unit 10, to the main control unit 10
It powers with each function module 20, and the power supply adaptor 32 and the rechargeable battery is reported to the main control unit 10
33 electric power thus supplieds.In alternating current and under-voltage rechargeable battery 33, alarm is sent out to the main control unit 10.Power management chip
31 are responsible for the transformation of electric energy, distribution, detection and management responsibility in systems.
The terminal system of the Android mainboard provides electric energy by the power supply adaptor 32 and the rechargeable battery 33,
It during the terminal system connection 220V AC powers, is powered using the power supply adaptor 32, the power supply adaptor 32 will
220V alternating currents are converted to 12V DC electricity, power to the main control unit 10 and each function module 20, described chargeable
Battery 33 is not involved in powering or in being electrically charged state.When the terminal system is without external power supply, the power supply switching
Power supply circuit is switched to the rechargeable battery 33 and powered by circuit 311.
Further, the charge control module 34 includes charge controlling chip 35 and charge control peripheral circuit, described
Charge controlling chip 35 is connected to the power supply adaptor 32 by the VCC pins, is connected to by the DRV pins described
Rechargeable battery 33 is connected to the charging monitoring circuit 351 by the CHRG pins, is connected to by the DONE pins
The charge status indicating light 352.
Threshold value is latched, and more than described chargeable when the VCC pin voltages of the charge controlling chip 35 are more than low pressure
During 33 voltage of battery, the charge control module 34 works normally, and charges to the rechargeable battery 33.If described fill
33 voltage of battery is less than 8.4V, and the charge control module 34 is automatically into trickle charge pattern, the charge controlling chip
35 carry out trickle charge with 15% pair of battery of set constant-current charge electric current.When 33 voltage of rechargeable battery is more than
8.4V, the charge control module 34 enter constant current charging mode, and charging current is by internal 200mV reference voltages and one at this time
A non-essential resistance Rcs settings, non-essential resistance Rcs are not marked in figure, i.e., charging current is 200mV/Rcs.When the chargeable electricity
When 33 voltage of pond continues to rise to constant-voltage charge voltage, the charge control module 34 enters constant-voltage charge pattern, charging current
It is gradually reduced.When charging current is reduced to the setting value of EOC pin resistance, charging terminates, DRV pins output high level.
Transistor shutdown inside CHRG pins, exports as high-impedance state；Transistor inside DONE pins is connected, and exports low level, institute
It states charge status indicating light 352 to light, to indicate that charged state terminates.If 33 voltage of rechargeable battery drops to 12V
When, automatically begin to new charge cycle.When input power power down or input voltage are less than cell voltage, the charge control
Chip 35 is automatically into sleep pattern.
And a kind of portable Android mainboard 100, including main control unit 10, it is connected to the main control unit 10
Multiple functional units 20 and electric power management circuit 30 as described above.
In the electric power management circuit of above-mentioned portable Android mainboard, being monitored by the charge control module 34 described can fill
The voltage of battery 33, when voltage is less than set threshold value, the charge control module 34 controls the rechargeable battery
33 chargings, after charging, 34 internal transistor of the charge control module shutdown exports high-impedance state.When input voltage is low
When 33 voltage of rechargeable battery, the charge control module 34 reduces kwh loss automatically into sleep state.When not having
When having mains supply input, powered, made described for the main control unit 10 and each functional unit 20 by the rechargeable battery 33
Electronic product is easy to carry to outdoor or a variety of occasions use.The utility model is simple in structure, and assembly technology is easy, at low cost
It is honest and clean, convenient for promoting.
It should be noted that the utility model is not limited to the above embodiment, it is according to the present utility model to create essence
God, those skilled in the art can also make other variations, these variations done according to the creative spirit of the utility model, all
It should be within the scope of the utility model be claimed.
Claims (10)
1. a kind of electric power management circuit of portable Android mainboard, the Android mainboard includes main control unit, is connected to institute
State multiple functional units of main control unit, which is characterized in that the electric power management circuit includes power management chip, power adaptation
Device, rechargeable battery, charge control module, the power supply adaptor is connected to mains supply and completes AC/DC conversions, in city
Power during electric plant-grid connection to the Android main board system, the charge control module respectively with the power supply adaptor and described
Rechargeable battery connects, and charges when there is mains supply access to the rechargeable battery, and the power management chip includes electricity
Source switching circuit, the power supply switch circuit are connected to the power supply adaptor and the rechargeable battery, for the power supply
Switching between adapter power supply circuit and the rechargeable battery power supply circuit.
2. the electric power management circuit of portable Android mainboard as described in claim 1, which is characterized in that the main control unit is adopted
With RK3188 chips.
3. the electric power management circuit of portable Android mainboard as described in claim 1, which is characterized in that the multiple function list
Member includes touch screen, audio frequency and video output module, WIFI/ bluetooth modules, usb interface module, memory/flash memory module, each described
Function module is respectively connected to the main control unit, is used to implement the corresponding function of mobile terminal.
4. the electric power management circuit of portable Android mainboard as claimed in claim 3, which is characterized in that the power management core
Piece is connected to the main control unit, powers to the main control unit and each functional unit, and reported to the main control unit
The power supply adaptor and the rechargeable battery electric power thus supplied.
5. the electric power management circuit of portable Android mainboard as described in claim 1, which is characterized in that the charge control mould
Block includes charge controlling chip and charge control peripheral circuit, and the charge controlling chip uses CN3703 chips, the charging
Control chip is connected to the rechargeable battery, for controlling the charging process of the rechargeable battery.
6. the electric power management circuit of portable Android mainboard as claimed in claim 5, which is characterized in that outside the charge control
It encloses circuit and includes charging monitoring circuit and charge status indicating light, be respectively connected to the rechargeable battery, it is described for detecting
The charging current and charged state of rechargeable battery.
7. the electric power management circuit of portable Android mainboard as claimed in claim 5, which is characterized in that the charge control core
Piece is equipped with VCC pins and DRV pins, and the VCC pins are connected to the power supply adaptor, and the DRV pins are connected to described
Rechargeable battery.
8. the electric power management circuit of portable Android mainboard as claimed in claim 6, which is characterized in that the charge control core
Piece is equipped with CHRG pins, and the CHRG pins are connected to the charging monitoring circuit.
9. the electric power management circuit of portable Android mainboard as claimed in claim 6, which is characterized in that the charge control core
Piece has DONE pins, and the DONE pins are connected to the charge status indicating light.
10. a kind of portable Android mainboard, which is characterized in that including main control unit, be connected to the more of the main control unit
A functional unit and such as claim 1-9 any one of them electric power management circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721618419.9U CN207588494U (en) | 2017-11-28 | 2017-11-28 | A kind of portable Android mainboard and its electric power management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721618419.9U CN207588494U (en) | 2017-11-28 | 2017-11-28 | A kind of portable Android mainboard and its electric power management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207588494U true CN207588494U (en) | 2018-07-06 |
Family
ID=62734002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721618419.9U Active CN207588494U (en) | 2017-11-28 | 2017-11-28 | A kind of portable Android mainboard and its electric power management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207588494U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115188274A (en) * | 2022-07-15 | 2022-10-14 | 美冠(北京)科技有限公司 | Digital commercial label with battery temperature monitoring function |
-
2017
- 2017-11-28 CN CN201721618419.9U patent/CN207588494U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115188274A (en) * | 2022-07-15 | 2022-10-14 | 美冠(北京)科技有限公司 | Digital commercial label with battery temperature monitoring function |
| CN115188274B (en) * | 2022-07-15 | 2023-11-07 | 美冠(北京)科技有限公司 | Digital commercial sign with battery temperature monitoring |
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