CN105955009A - Power supply circuit and intelligent bracelet of real-time clock - Google Patents
Power supply circuit and intelligent bracelet of real-time clock Download PDFInfo
- Publication number
- CN105955009A CN105955009A CN201610270633.3A CN201610270633A CN105955009A CN 105955009 A CN105955009 A CN 105955009A CN 201610270633 A CN201610270633 A CN 201610270633A CN 105955009 A CN105955009 A CN 105955009A
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- China
- Prior art keywords
- power supply
- real
- battery
- time clock
- lithium battery
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Classifications
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
- A44C5/0007—Bracelets specially adapted for other functions or with means for attaching other articles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the technical field of intelligent terminal, and especially relates to a power supply circuit and an intelligent bracelet of a real-time clock. In the embodiment of the invention, the power supply circuit of the real-time clock separately comprises a first power supply branch and a second power supply branch which supply the power for a real-time clock chip, the first power supply branch comprises the anode of a lithium battery, a voltage division circuit and the real-time clock chip which are connected in sequence, the second power supply branch comprises the anode of a lithium battery, a voltage reduction circuit and the real-time clock chip which are connected in sequence, a battery protection circuit detects that the lithium battery output is undervoltage, the second power supply branch is powered off, the first power supply branch maintains a conducting state, the real-time clock chip can not stop working because of power off, the time without losing is ensured, and no new battery is added in the scheme, so that the volume and the cost of the intelligent bracelet are avoided to increase.
Description
Technical field
The invention belongs to intelligent terminal's technical field, particularly relate to power supply circuits and the intelligence of a kind of real-time clock
Bracelet.
Background technology
The power supply of existing Intelligent bracelet real-time clock has two ways, one to be that real-time clock is with Intelligent bracelet
Other circuit share a battery, and share a road battery protection.When cell voltage is less than 3V, battery
Protection circuit Enable Pin OD output low level, makes MOS disconnect battery ground and the connection on master control ground, thus disconnected
Open the power supply of the mainboard 3.3V of Intelligent bracelet, in this case.Within the time of Intelligent bracelet power-off,
The real-time clock of Intelligent bracelet cannot the retention time, when the 3.3V of master control borad powers on again, Intelligent bracelet
Time will be reset to default value rather than current time.
In order to ensure the period in Intelligent bracelet power-off, the time of real-time clock is not lost, and uses a list
Only button cell is powered to the real-time clock of bracelet, and other circuit of Intelligent bracelet then use another lithium battery
Power supply.Although so can ensure that when the lithium battery of Intelligent bracelet is less than 3V, i.e. the voltage 3.3V of other circuit
During disconnection, the time of real-time clock can continue to keep.However it is necessary that one button cell of interpolation, increase intelligence
The volume of energy bracelet and cost.
Summary of the invention
The purpose of the embodiment of the present invention is to provide the power supply circuits of a kind of real-time clock, it is intended to solution is now
Avoid Intelligent bracelet real-time clock not power-off, it is necessary to increase volume and the problem of cost of Intelligent bracelet.
The embodiment of the present invention is achieved in that the power supply circuits of a kind of real-time clock, described real-time clock
Power supply circuits include that lithium battery and real-time timepiece chip, the power supply circuits of described real-time clock also include:
Bleeder circuit, reduction voltage circuit, battery protecting circuit and double metal-oxide-semiconductor；
The power supply circuits of described real-time clock include the first power supply branch road and the second power supply branch road, and described first supplies
Electricity branch road is the positive pole of described lithium battery, bleeder circuit and the real-time timepiece chip being sequentially connected with, described second
Power supply branch road is the positive pole of described lithium battery, reduction voltage circuit and the real-time timepiece chip being sequentially connected with；
The detection of described battery protecting circuit terminates the positive pole of described lithium battery, holding of described battery protecting circuit
The drive end of row described pair of metal-oxide-semiconductor of termination, the two ends of described pair of metal-oxide-semiconductor connect the electricity of described lithium battery respectively
Ground, pond and master control ground, described battery protecting circuit detects that the output of described lithium battery is under-voltage, controls described double
Metal-oxide-semiconductor cuts off described battery ground and the loop on master control ground, and described second power supply branch road power-off, described first supplies
Electricity branch road is held on.
In said structure, the power supply circuits of described real-time clock also include:
It is connected to the diode between positive pole and the test side of battery protecting circuit of described lithium battery.
In said structure, described battery protecting circuit uses battery protection chip U1, described battery protection chip
The test side CSI of U1 meets the positive pole of described lithium battery, described battery protection chip U1 by described diode
Charge protection actuating station OD and discharge prevention actuating station OC connect two drivings of described pair of metal-oxide-semiconductor respectively
End.
The another object of the embodiment of the present invention is to provide a kind of Intelligent bracelet, including the power supply electricity of real-time clock
Road, the power supply circuits of described real-time clock include lithium battery and real-time timepiece chip, the confession of described real-time clock
Electricity circuit also includes:
Bleeder circuit, reduction voltage circuit, battery protecting circuit and double metal-oxide-semiconductor；
The power supply circuits of described real-time clock include the first power supply branch road and the second power supply branch road, and described first supplies
Electricity branch road is the positive pole of described lithium battery, bleeder circuit and the real-time timepiece chip being sequentially connected with, described second
Power supply branch road is the positive pole of described lithium battery, reduction voltage circuit and the real-time timepiece chip being sequentially connected with；
The detection of described battery protecting circuit terminates the positive pole of described lithium battery, holding of described battery protecting circuit
The drive end of row described pair of metal-oxide-semiconductor of termination, the two ends of described pair of metal-oxide-semiconductor connect the electricity of described lithium battery respectively
Ground, pond and master control ground, described battery protecting circuit detects that the output of described lithium battery is under-voltage, controls described double
Metal-oxide-semiconductor cuts off described battery ground and the loop on master control ground, and described second power supply branch road power-off, described first supplies
Electricity branch road is held on.
In said structure, the power supply circuits of described real-time clock also include:
It is connected to the diode between positive pole and the test side of battery protecting circuit of described lithium battery.
In said structure, described battery protecting circuit uses battery protection chip U1, described battery protection chip
The test side CSI of U1 meets the positive pole of described lithium battery, described battery protection chip U1 by described diode
Charge protection actuating station OD and discharge prevention actuating station OC connect two drivings of described pair of metal-oxide-semiconductor respectively
End.
In embodiments of the present invention, the power supply circuits of described real-time clock include supplying for real-time timepiece chip respectively
First power supply branch road of electricity and the second power supply branch road, described first power supply branch road is the described lithium electricity being sequentially connected with
The positive pole in pond, bleeder circuit and real-time timepiece chip, described second power supply branch road is the described lithium being sequentially connected with
The positive pole of battery, reduction voltage circuit and real-time timepiece chip, battery protecting circuit detects that lithium battery output is under-voltage,
Second power supply branch road power-off, the first power supply branch road is held on, and real-time timepiece chip also will not be because of power-off
Quitting work, it is ensured that the time does not loses, the program is not owing to increasing new battery simultaneously, it is to avoid increase
The volume of Intelligent bracelet and cost.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the power supply circuits of the real-time clock that first embodiment of the invention provides；
Fig. 2 is the circuit structure diagram of the power supply circuits of the real-time clock that second embodiment of the invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
Fig. 1 shows the circuit structure of the power supply circuits of the real-time clock that first embodiment of the invention provides, for
It is easy to explanation, illustrate only the part relevant to the embodiment of the present invention.
The power supply circuits of a kind of real-time clock, the power supply circuits of described real-time clock include that lithium battery 1 is with in real time
Clock chip 2, the power supply circuits of described real-time clock also include:
Bleeder circuit 3, reduction voltage circuit 4, battery protecting circuit 5 and double metal-oxide-semiconductor 6；
The power supply circuits of described real-time clock include the first power supply branch road and the second power supply branch road, and described first supplies
Electricity branch road is the positive pole of described lithium battery 1, bleeder circuit 3 and the real-time timepiece chip 2 being sequentially connected with, institute
Stating the second power supply branch road is the positive pole of described lithium battery 1, reduction voltage circuit 4 and the real-time clock core being sequentially connected with
Sheet 2；And the second power supply branch road powers the most also to other functional circuits.
The detection of described battery protecting circuit 5 terminates the positive pole of described lithium battery 1, described battery protecting circuit
The drive end performing described pair of metal-oxide-semiconductor 6 of termination of 5, the two ends of described pair of metal-oxide-semiconductor 6 connect described respectively
The battery ground of lithium battery 1 and master control ground, described battery protecting circuit 5 detects that the output of described lithium battery 1 is owed
Pressure, control described pair of metal-oxide-semiconductor 6 with cutting off described battery and master control ground loop, described second power supply
Road power-off, described first power supply branch road is held on.
So exporting under-voltage because of lithium battery 1, the second power supply branch road is cut off, and the first power supply branch road keeps leading
Logical, real-time timepiece chip 2 is directly powered by lithium battery 1, though therefore other functional circuit power-off, in real time
Clock chip 2 also will not quit work because of power-off, it is ensured that the time does not loses.
Fig. 2 shows the circuit structure of the power supply circuits of the real-time clock that second embodiment of the invention provides, for
It is easy to explanation, illustrate only the part relevant to the embodiment of the present invention.
As one embodiment of the invention, the power supply circuits of described real-time clock also include:
It is connected to the diode 7 between positive pole and the test side of battery protecting circuit 5 of described lithium battery 1.
As one embodiment of the invention, described battery protecting circuit 5 uses battery protection chip U1, described electricity
The test side CSI of pond protection chip U1 connects the positive pole of described lithium battery 1 by described diode 7, described
Charge protection actuating station OD of battery protection chip U1 and discharge prevention actuating station OC connect described double respectively
Two drive ends of metal-oxide-semiconductor 6.
As it is shown in figure 1, the embodiment of the present invention also provides for a kind of Intelligent bracelet, including the power supply electricity of real-time clock
Road, the power supply circuits of described real-time clock include lithium battery 1 and real-time timepiece chip 2, described real-time clock
Power supply circuits also include:
Bleeder circuit 3, reduction voltage circuit 4, battery protecting circuit 5 and double metal-oxide-semiconductor 6；
The power supply circuits of described real-time clock include the first power supply branch road and the second power supply branch road, and described first supplies
Electricity branch road is the positive pole of described lithium battery 1, bleeder circuit 3 and the real-time timepiece chip 2 being sequentially connected with, institute
Stating the second power supply branch road is the positive pole of described lithium battery 1, reduction voltage circuit 4 and the real-time clock core being sequentially connected with
Sheet 2；
The detection of described battery protecting circuit 5 terminates the positive pole of described lithium battery 1, described battery protecting circuit
The drive end performing described pair of metal-oxide-semiconductor 6 of termination of 5, the two ends of described pair of metal-oxide-semiconductor 6 connect described respectively
The battery ground of lithium battery 1 and master control ground, described battery protecting circuit 5 detects that the output of described lithium battery 1 is owed
Pressure, control described pair of metal-oxide-semiconductor 6 with cutting off described battery and master control ground loop, described second power supply
Road power-off, described first power supply branch road is held on.
As in figure 2 it is shown, as one embodiment of the invention, the power supply circuits of described real-time clock also include:
It is connected to the diode 7 between positive pole and the test side of battery protecting circuit 5 of described lithium battery 1.
As one embodiment of the invention, described battery protecting circuit 5 uses battery protection chip U1, described electricity
The test side CSI of pond protection chip U1 connects the positive pole of described lithium battery 1 by described diode 7, described
Charge protection actuating station OD of battery protection chip U1 and discharge prevention actuating station OC connect described double respectively
Two drive ends of metal-oxide-semiconductor 6.
The operation principle of the power supply circuits of this real-time clock be exemplified below:
This programme uses a lithium battery 1 to power, and real-time timepiece chip 2 is powered by two power supply branch roads, and one
Route lithium battery 1 voltage is powered directly to real-time timepiece chip 2 through bleeder circuit 3, another route lithium electricity
Pond 1 powers, when lithium battery 1 voltage to after reduction voltage circuit 4 is depressured to 3.3V real-time timepiece chip 2 again
During higher than 3.6V, lithium battery 1 can provide voltage by bio-occlusion reduction voltage circuit 4, thus reduction voltage circuit 4 can export
Normal 3.3V, now, real-time timepiece chip 2 all uses 3.3V to power with other all circuit of mainboard,
Intelligent bracelet normally works；When lithium battery 1 voltage is down to 3.6V, because there is pressure drop in diode 7, electricity
The input voltage that pond protection circuit 5 detects is 3V, reaches exactly to the under-voltage level of battery protection chip, electricity
Pond protection circuit 5 output low level.Thus with being disconnected the master control of double mos pipe 5 with the loop on battery ground,
Lithium battery 1 no longer discharges to Intelligent bracelet, and now other functional circuits of Intelligent bracelet mainboard quit work；
And real-time timepiece chip 2 detects that 3.3V input pin, less than 1.2V, automatically switches to by lithium battery 1 straight
The power voltage supply of offer is provided, because real-time timepiece chip 2 power consumption that we use is the lowest, even if so lithium
The remaining electricity of battery 1 is few, also can guarantee that the long-time of real-time timepiece chip 2 is not lost.
In embodiments of the present invention, the power supply circuits of described real-time clock include supplying for real-time timepiece chip respectively
First power supply branch road of electricity and the second power supply branch road, described first power supply branch road is the described lithium electricity being sequentially connected with
The positive pole in pond, bleeder circuit and real-time timepiece chip, described second power supply branch road is the described lithium being sequentially connected with
The positive pole of battery, reduction voltage circuit and real-time timepiece chip, battery protecting circuit detects that lithium battery output is under-voltage,
Second power supply branch road power-off, the first power supply branch road is held on, and real-time timepiece chip also will not be because of power-off
Quitting work, it is ensured that the time does not loses, the program is not owing to increasing new battery simultaneously, it is to avoid increase
The volume of Intelligent bracelet and cost.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (6)
1. power supply circuits for real-time clock, the power supply circuits of described real-time clock include that lithium battery is with in real time
Clock chip, it is characterised in that the power supply circuits of described real-time clock also include:
Bleeder circuit, reduction voltage circuit, battery protecting circuit and double metal-oxide-semiconductor；
The power supply circuits of described real-time clock include the first power supply branch road and the second power supply branch road, and described first supplies
Electricity branch road is the positive pole of described lithium battery, bleeder circuit and the real-time timepiece chip being sequentially connected with, described second
Power supply branch road is the positive pole of described lithium battery, reduction voltage circuit and the real-time timepiece chip being sequentially connected with；
The detection of described battery protecting circuit terminates the positive pole of described lithium battery, holding of described battery protecting circuit
The drive end of row described pair of metal-oxide-semiconductor of termination, the two ends of described pair of metal-oxide-semiconductor connect the electricity of described lithium battery respectively
Ground, pond and master control ground, described battery protecting circuit detects that the output of described lithium battery is under-voltage, controls described double
Metal-oxide-semiconductor cuts off described battery ground and the loop on master control ground, and described second power supply branch road power-off, described first supplies
Electricity branch road is held on.
2. the power supply circuits of real-time clock as claimed in claim 1, it is characterised in that described real-time clock
Power supply circuits also include:
It is connected to the diode between positive pole and the test side of battery protecting circuit of described lithium battery.
3. the power supply circuits of real-time clock as claimed in claim 2, it is characterised in that described battery protection
Circuit uses battery protection chip U1, the test side CSI of described battery protection chip U1 by described two poles
Pipe connects the positive pole of described lithium battery, charge protection actuating station OD of described battery protection chip U1 and electric discharge
Protection actuating station OC connects two drive ends of described pair of metal-oxide-semiconductor respectively.
4. an Intelligent bracelet, including the power supply circuits of real-time clock, the power supply circuits bag of described real-time clock
Include lithium battery and real-time timepiece chip, it is characterised in that the power supply circuits of described real-time clock also include:
Bleeder circuit, reduction voltage circuit, battery protecting circuit and double metal-oxide-semiconductor；
The power supply circuits of described real-time clock include the first power supply branch road and the second power supply branch road, and described first supplies
Electricity branch road is the positive pole of described lithium battery, bleeder circuit and the real-time timepiece chip being sequentially connected with, described second
Power supply branch road is the positive pole of described lithium battery, reduction voltage circuit and the real-time timepiece chip being sequentially connected with；
The detection of described battery protecting circuit terminates the positive pole of described lithium battery, holding of described battery protecting circuit
The drive end of row described pair of metal-oxide-semiconductor of termination, the two ends of described pair of metal-oxide-semiconductor connect the electricity of described lithium battery respectively
Ground, pond and master control ground, described battery protecting circuit detects that the output of described lithium battery is under-voltage, controls described double
Metal-oxide-semiconductor cuts off described battery ground and the loop on master control ground, and described second power supply branch road power-off, described first supplies
Electricity branch road is held on.
5. Intelligent bracelet as claimed in claim 4, it is characterised in that the power supply circuits of described real-time clock
Also include:
It is connected to the diode between positive pole and the test side of battery protecting circuit of described lithium battery.
6. Intelligent bracelet as claimed in claim 5, it is characterised in that described battery protecting circuit uses electricity
Protection chip U1, the test side CSI of described battery protection chip U1 connect described lithium by described diode in pond
The positive pole of battery, charge protection actuating station OD of described battery protection chip U1 and discharge prevention actuating station
OC connects two drive ends of described pair of metal-oxide-semiconductor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610270633.3A CN105955009B (en) | 2016-04-27 | 2016-04-27 | Power supply circuit of real-time clock and intelligent bracelet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610270633.3A CN105955009B (en) | 2016-04-27 | 2016-04-27 | Power supply circuit of real-time clock and intelligent bracelet |
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| Publication Number | Publication Date |
|---|---|
| CN105955009A true CN105955009A (en) | 2016-09-21 |
| CN105955009B CN105955009B (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610270633.3A Active CN105955009B (en) | 2016-04-27 | 2016-04-27 | Power supply circuit of real-time clock and intelligent bracelet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106805384A (en) * | 2017-03-08 | 2017-06-09 | 南京信息工程大学 | A kind of new weather monitoring Intelligent bracelet |
| CN111025887A (en) * | 2019-12-19 | 2020-04-17 | 深圳市创维群欣安防科技股份有限公司 | RTC circuit and RTC electronic product of circulation power supply |
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| CN106805384A (en) * | 2017-03-08 | 2017-06-09 | 南京信息工程大学 | A kind of new weather monitoring Intelligent bracelet |
| CN111025887A (en) * | 2019-12-19 | 2020-04-17 | 深圳市创维群欣安防科技股份有限公司 | RTC circuit and RTC electronic product of circulation power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105955009B (en) | 2019-12-10 |
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Effective date of registration: 20190417 Address after: 518000 Guangdong province Shenzhen Longgang District Bantian Street five and Avenue North 4012 Yuan Zheng Industrial Park. Applicant after: Yuanzheng Science and Technology Co., Ltd., Shenzhen City Address before: 518000 Shenzhen, Guangdong province Longgang District ban Xue Gang Industrial Zone five and Avenue North Yuan Zheng Industrial Park. Applicant before: HESVIT HEALTH TECH CO., LTD. |
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