CN205485902U - Automatic start circuit and electronic equipment - Google Patents
Automatic start circuit and electronic equipment Download PDFInfo
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- CN205485902U CN205485902U CN201620083620.0U CN201620083620U CN205485902U CN 205485902 U CN205485902 U CN 205485902U CN 201620083620 U CN201620083620 U CN 201620083620U CN 205485902 U CN205485902 U CN 205485902U
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Abstract
The utility model discloses an auto -on circuit for among the electronic equipment, when electronic equipment is connected with power adapter and charges to cell, auto -on circuit trigger power source management chip auto -on, wherein, the auto -on circuit includes partial pressure module, MOS pipe and the 2nd MOS pipe, power management chip includes PWRON pin and IO pin, wherein, partial pressure module will follow be connected to after the input voltage partial pressure that power adapter obtained the grid of MOS pipe, the source electrode ground connection of MOS pipe, the drain electrode is connected to power management chip's PWRON pin, the grid of the 2nd MOS pipe is connected to power management chip's IO pin, source electrode ground connection, the drain electrode is connected to the grid of MOS pipe. When electronic equipment was inserting power adapter under the power off and charges, electronic equipment auto -on can be controlled to this auto -on circuit to the control charged state, the so as to avoid is dangerous.
Description
Technical field
This utility model relates to a kind of electronic equipment, the automatic boot circuit in a kind of electronic equipment,
When electronic equipment is inserted into power supply adaptor, automatic boot circuit controls this electronic equipment Auto Power On.
Background technology
At present electronic equipment, the most hand-held (consumption) mobile digital equipment, such as mobile phone, flat board electricity
In the equipment such as brain and intelligent sound box, the start of equipment produces an arteries and veins typically by the button pressed on equipment
Rush what signal started.The working power of equipment is provided by battery unit, is generally also configured with corresponding power supply
Managing chip, starts power management chip by the triggering of key pulse, powers controlling battery unit.When
During the electricity deficiency of battery unit, by accessing power supply adaptor, battery unit is charged.
When electronic equipment is at off-mode, when battery unit being charged now by access power supply adaptor,
Need the electronic equipment can Auto Power On, in order in charging process, power management chip can monitor always fill
Electricity condition, protects battery, to avoid danger.Therefore, it is badly in need of a kind of automatic boot circuit at present,
So that electronic equipment can Auto Power On when being inserted into power supply adaptor.
Utility model content
In view of this, this utility model provides a kind of automatic boot circuit, is applied in electronic equipment, when
When electronic equipment accesses power supply adaptor charging in the power-offstate, this automatic boot circuit can control electronics
Equipment Auto Power On, to monitor charged state, to avoid danger.
To achieve the above object, this utility model have employed following technical scheme:
A kind of automatic boot circuit, in electronic equipment, described electronic equipment includes battery unit and power supply
Managing chip, when described electronic equipment connect have power supply adaptor charge to described battery unit time, described oneself
Dynamic boot-strap circuit triggers described power management chip Auto Power On, and wherein, described automatic boot circuit includes point
Die block, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, described power management chip include PWRON pin and
I/O pin, when the signal of PWRON pin changes to high level from high level to low level again, described electricity
Source control chip is triggered, and when PWRON pin changes from high level to low level, described I/O pin is defeated
Go out a high level signal；Wherein, the input voltage obtained from described power supply adaptor is divided by described division module
Being connected to the grid of described first metal-oxide-semiconductor, the source ground of described first metal-oxide-semiconductor after pressure, drain electrode connects
PWRON pin to described power management chip；The grid of described second metal-oxide-semiconductor is connected to described power supply
The I/O pin of managing chip, source ground, drain electrode is connected to the grid of described first metal-oxide-semiconductor.
Preferably, described division module includes the first resistance and second resistance of series connection, described first resistance
One end receives the input voltage obtained from described power supply adaptor, and one end of the other end and the second resistance connects,
The other end ground connection of the second resistance；The grid of described first metal-oxide-semiconductor is connected to described first resistance and the second electricity
Between resistance.
Preferably, the resistance of described first resistance and the second resistance is equal.
Preferably, described division module also includes that an electric capacity, one end of described electric capacity are connected to described first electricity
Between resistance and the second resistance, other end ground connection.
In an other embodiment, the first metal-oxide-semiconductor in automatic boot circuit as provided above and
Second metal-oxide-semiconductor is replaced by the first audion and the second audion respectively；Wherein, described division module will be from institute
The base stage of described first audion it is connected to after stating the input voltage dividing potential drop that power supply adaptor obtains, described first
The grounded emitter of audion, colelctor electrode is connected to the PWRON pin of described power management chip；Described
The base stage of the second audion is connected to the I/O pin of described power management chip, grounded emitter, and colelctor electrode is even
Receive the base stage of described first audion.
This utility model additionally provides a kind of electronic equipment, and it includes battery unit and power management chip, also
Including automatic boot circuit as above.
Wherein, described battery unit includes the battery that an economize on electricity pressure is 4.2V, the volume of corresponding power supply adaptor
Determining voltage is 5V；Or, described battery unit includes the battery that two economize on electricity pressures are 4.2V, electricity accordingly
The rated voltage of source adapter is 12V.
Compared to prior art, the automatic boot circuit that this utility model provides, it is applied in electronic equipment,
When electronic equipment accesses power supply adaptor charging in the power-offstate, this automatic boot circuit can control electricity
Subset Auto Power On, to monitor charged state, to avoid danger.This utility model embodiment provides
Automatic boot circuit is especially particularly well-suited to the battery electron equipment that battery unit includes that two economize on electricity pressures are 4.2V,
Using binodal battery power supply to the device so that supply current reduces half, caloric value reduces, to battery and setting
Standby can playing preferably is protected.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the electronic equipment that this utility model embodiment provides；
Fig. 2 is the circuit diagram of the automatic boot circuit that this utility model embodiment provides；
Fig. 3 is the circuit diagram of the automatic boot circuit that another embodiment of this utility model provides.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is expanded on further.Should be understood that these embodiments are only used
In this utility model being described rather than limiting scope of the present utility model.In addition, it is to be understood that reading this
After the content that utility model is lectured, this utility model can be made various change or repair by those skilled in the art
Changing, these equivalent form of values fall within the application appended claims limited range equally.
Here, also, it should be noted in order to avoid having obscured this utility model because of unnecessary details,
Illustrate only in the accompanying drawings and according to the closely-related structure of scheme of the present utility model and/or process step,
And eliminate other details little with this utility model relation.
The present embodiment provide firstly a kind of electronic equipment, as it is shown in figure 1, described electronic equipment 100 includes
Battery unit 10, power management chip 20 and automatic boot circuit 30, when described electronic equipment 100 connects
Being connected to power supply adaptor 200 when described battery unit 10 charges, described automatic boot circuit 30 triggers institute
State power management chip 20 Auto Power On.
Wherein, described electronic equipment is primarily referred to as hand-held (consumption) mobile digital equipment, such as mobile phone, flat board
The equipment such as computer and intelligent sound box.Described battery unit 10 can be to include the battery that an economize on electricity pressure is 4.2V,
The rated voltage of corresponding power supply adaptor 200 is 5V；Or, described battery unit 10 includes two joints
Voltage is respectively the battery of 4.2V, and the rated voltage of corresponding power supply adaptor is 12V, such as, intelligent sound
Case, the most just uses two economize on electricity pressures to be respectively the battery of 4.2V.Use binodal battery power supply to the device so that
Supply current reduces half, and caloric value reduces, and battery and equipment can play preferably protection.
Wherein, refering to Fig. 2, the automatic boot circuit 30 provided in the present embodiment mainly include division module 31,
First metal-oxide-semiconductor 32 and the second metal-oxide-semiconductor 33, described power management chip 20 include PWRON pin and
I/O pin.When the signal of PWRON pin changes to high level from high level to low level again, described electricity
Source control chip 20 is triggered start, when PWRON pin changes from high level to low level, described IO
Pin exports a high level signal.Specifically, as in figure 2 it is shown, described division module 31 will be from described power supply
The grid g1 of described first metal-oxide-semiconductor 32 it is connected to after the input voltage vin dividing potential drop that adapter 200 obtains,
The source electrode s1 ground connection of described first metal-oxide-semiconductor 32, drain electrode d1 is connected to described power management chip 20
PWRON pin；The grid g2 of described second metal-oxide-semiconductor 33 is connected to described power management chip 20
I/O pin, source electrode s2 ground connection, drain electrode d2 is connected to the grid g1 of described first metal-oxide-semiconductor 32.
The process that automatic boot circuit 30 provided above triggers startup power management chip 20 is as follows:
(1) before inserting power supply adaptor 200, the PWRON pin of power management chip 20 is set
Being set to high level, I/O pin output low level, now the first metal-oxide-semiconductor 32 and the second metal-oxide-semiconductor 33 are
Cut-off state；
(2) when inserting power supply adaptor 200, division module 31 will obtain from described power supply adaptor 200
Form high level after input voltage vin dividing potential drop and be connected to the grid g1, a MOS of the first metal-oxide-semiconductor 32
Pipe 32 turns on, and now PWRON pin changes to low level from high level；
(3) when step (2) changes to low level when PWRON pin from high level, I/O pin output one
High level signal is connected to the grid g2 of the second metal-oxide-semiconductor 33, and the second metal-oxide-semiconductor 33 turns on, and now first
The signal that the grid g1 of metal-oxide-semiconductor 32 connects changes to low level from high level, and the first metal-oxide-semiconductor 32 ends,
PWRON pin changes to high level from low level.
Through above process, the signal of PWRON pin experienced by from high level to low level again to high level
Change, described power management chip 20 is triggered start, can monitor power supply adaptor 200 to battery unit
The charged state of 10, to avoid danger.
Specifically, in the present embodiment, as in figure 2 it is shown, described division module 31 includes the first electricity of series connection
One end of resistance R1 and the second resistance R2, described first resistance R1 receives and obtains from described power supply adaptor 200
Input voltage vin, one end of the other end and the second resistance R2 connects, another termination of the second resistance R2
Ground；The grid g1 of described first metal-oxide-semiconductor 32 be connected to described first resistance R1 and the second resistance R2 it
Between.Preferably, the resistance that the resistance of described first resistance R1 and the second resistance R2 employing is equal.
Specifically, the grid g2 of described second metal-oxide-semiconductor 33 is connected to I/O pin by the 3rd resistance R3；
The PWRON pin of power management chip 20 is connected to high level Vcc, Vcc by the 4th resistance R4 can
To be to be provided by battery unit 10, thus, when the first metal-oxide-semiconductor 32 ends, PWRON pin is set
It is set to high level.
Further, described division module 31 also includes that an electric capacity C, one end of described electric capacity C are connected to institute
State between the first resistance R1 and the second resistance R2, other end ground connection.
It should be noted that in the automatic boot circuit 30 that provided of example performed as described above, refering to Fig. 3, wherein
The first metal-oxide-semiconductor 32 and the second metal-oxide-semiconductor 33 can be respectively by the first audion 32a and the second audion
33a replaces.Specifically, as it is shown on figure 3, described first audion 32a base stage b1 is connected to described first
Between resistance R1 and the second resistance R2, emitter e 1 ground connection, colelctor electrode c1 is connected to described power management
The PWRON pin of chip 20；Base stage b2 of described second audion 33a is connected to described power management
The I/O pin of chip 20, emitter e 2 ground connection, colelctor electrode c2 is connected to the base of described first audion 32a
Pole b1.Can be respectively by the first audion 32a and second by the first metal-oxide-semiconductor 32 and the second metal-oxide-semiconductor 33
After audion 33a replaces, the work process of automatic boot circuit 30 is identical with previous embodiment,
This repeats no more.
In sum, the automatic boot circuit that this utility model provides, it is applied in electronic equipment, works as electronics
When equipment accesses power supply adaptor charging in the power-offstate, this automatic boot circuit can control electronic equipment
Auto Power On, to monitor charged state, to avoid danger.What this utility model embodiment provided opens automatically
Dynamo-electric road is especially particularly well-suited to the battery electron equipment that battery unit includes that two economize on electricity pressures are 4.2V, uses double
Batteries power supply to the device so that supply current reduces half, caloric value reduces, can to battery and equipment
Play preferably protection.
The above is only the detailed description of the invention of the application, it is noted that common for the art
For technical staff, on the premise of without departing from the application principle, it is also possible to make some improvements and modifications,
These improvements and modifications also should be regarded as the protection domain of the application.
Claims (10)
1. an automatic boot circuit, in electronic equipment, described electronic equipment includes battery unit and electricity
Source control chip, when described electronic equipment connects and has power supply adaptor to charge to described battery unit, described
Automatic boot circuit triggers described power management chip Auto Power On, it is characterised in that
Described automatic boot circuit includes division module, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, described power supply
Managing chip includes PWRON pin and I/O pin, when the signal of PWRON pin from high level to low electricity
The flat high level that arrive again is when changing, and described power management chip is triggered, when PWRON pin from high level to
During low level change, described I/O pin exports a high level signal；
Wherein, it is connected to institute after the input voltage dividing potential drop that described division module will obtain from described power supply adaptor
Stating the grid of the first metal-oxide-semiconductor, the source ground of described first metal-oxide-semiconductor, drain electrode is connected to described power supply pipe
The PWRON pin of reason chip；The grid of described second metal-oxide-semiconductor is connected to the IO of described power management chip
Pin, source ground, drain electrode is connected to the grid of described first metal-oxide-semiconductor.
Automatic boot circuit the most according to claim 1, it is characterised in that described division module includes
First resistance of series connection and the second resistance, one end of described first resistance receives and obtains from described power supply adaptor
Input voltage, one end of the other end and the second resistance connects, the other end ground connection of the second resistance；Described
The grid of one metal-oxide-semiconductor is connected between described first resistance and the second resistance.
Automatic boot circuit the most according to claim 2, it is characterised in that described first resistance and
The resistance of two resistance is equal.
4. according to the automatic boot circuit described in Claims 2 or 3, it is characterised in that described division module
Also include that an electric capacity, one end of described electric capacity are connected between described first resistance and the second resistance, the other end
Ground connection.
5. an automatic boot circuit, in electronic equipment, described electronic equipment includes battery unit and electricity
Source control chip, when described electronic equipment connects and has power supply adaptor to charge to described battery unit, described
Automatic boot circuit triggers described power management chip Auto Power On, it is characterised in that
Described automatic boot circuit includes division module, the first audion and the second audion, described power supply pipe
Reason chip includes PWRON pin and I/O pin, when the signal of PWRON pin is from high level to low level
When arriving high level change again, described power management chip is triggered, when PWRON pin from high level to low
During level change, described I/O pin exports a high level signal；
Wherein, it is connected to institute after the input voltage dividing potential drop that described division module will obtain from described power supply adaptor
Stating the base stage of the first audion, the grounded emitter of described first audion, colelctor electrode is connected to described power supply
The PWRON pin of managing chip；The base stage of described second audion is connected to described power management chip
I/O pin, grounded emitter, colelctor electrode is connected to the base stage of described first audion.
Automatic boot circuit the most according to claim 5, it is characterised in that described division module includes
First resistance of series connection and the second resistance, one end of described first resistance receives and obtains from described power supply adaptor
Input voltage, one end of the other end and the second resistance connects, the other end ground connection of the second resistance；Described
The base stage of one audion is connected between described first resistance and the second resistance.
Automatic boot circuit the most according to claim 6, it is characterised in that described first resistance and
The resistance of two resistance is equal.
8. according to the automatic boot circuit described in claim 6 or 7, it is characterised in that described division module
Also include that an electric capacity, one end of described electric capacity are connected between described first resistance and the second resistance, the other end
Ground connection.
9. an electronic equipment, including battery unit and power management chip, it is characterised in that also include as
The arbitrary described automatic boot circuit of claim 1-8.
Electronic equipment the most according to claim 9, it is characterised in that described battery unit includes one
Economize on electricity pressure is the battery of 4.2V, and the rated voltage of corresponding power supply adaptor is 5V；Or, described electricity
Pool unit includes the battery that two economize on electricity pressures are 4.2V, and the rated voltage of corresponding power supply adaptor is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620083620.0U CN205485902U (en) | 2016-01-28 | 2016-01-28 | Automatic start circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620083620.0U CN205485902U (en) | 2016-01-28 | 2016-01-28 | Automatic start circuit and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN205485902U true CN205485902U (en) | 2016-08-17 |
Family
ID=56619840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620083620.0U Active CN205485902U (en) | 2016-01-28 | 2016-01-28 | Automatic start circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205485902U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106933321A (en) * | 2017-01-20 | 2017-07-07 | 惠州Tcl移动通信有限公司 | A kind of electronic equipment and its starting-up method |
| CN107302246A (en) * | 2017-06-27 | 2017-10-27 | 南昌与德通讯技术有限公司 | charging detecting circuit and terminal device |
| CN107515749A (en) * | 2017-08-15 | 2017-12-26 | 北京小米移动软件有限公司 | Starting-up method, device and the electronic equipment of electronic equipment |
| CN108720797A (en) * | 2018-05-30 | 2018-11-02 | 山东煜和堂药业有限公司 | Charger Auto Power On and video power supply circuit are inserted into visible laryngoscope switching on and shutting down |
| CN110716757A (en) * | 2019-10-18 | 2020-01-21 | 展讯通信（深圳）有限公司 | Starting device, power management chip and electronic equipment |
| CN112882756A (en) * | 2021-01-18 | 2021-06-01 | 读书郎教育科技有限公司 | Intelligent classroom tablet system and method capable of achieving one-key startup |
| CN112925246A (en) * | 2021-01-29 | 2021-06-08 | 北京紫光展锐通信技术有限公司 | Starting-up control circuit and related device thereof |
| WO2021128710A1 (en) * | 2019-12-26 | 2021-07-01 | 上海派能能源科技股份有限公司 | Battery power-on circuit |
-
2016
- 2016-01-28 CN CN201620083620.0U patent/CN205485902U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106933321A (en) * | 2017-01-20 | 2017-07-07 | 惠州Tcl移动通信有限公司 | A kind of electronic equipment and its starting-up method |
| CN107302246A (en) * | 2017-06-27 | 2017-10-27 | 南昌与德通讯技术有限公司 | charging detecting circuit and terminal device |
| CN107302246B (en) * | 2017-06-27 | 2020-08-28 | 诸暨市澳速机械设计工作室 | Charging detection circuit and terminal equipment |
| CN107515749A (en) * | 2017-08-15 | 2017-12-26 | 北京小米移动软件有限公司 | Starting-up method, device and the electronic equipment of electronic equipment |
| CN108720797A (en) * | 2018-05-30 | 2018-11-02 | 山东煜和堂药业有限公司 | Charger Auto Power On and video power supply circuit are inserted into visible laryngoscope switching on and shutting down |
| CN110716757A (en) * | 2019-10-18 | 2020-01-21 | 展讯通信（深圳）有限公司 | Starting device, power management chip and electronic equipment |
| CN110716757B (en) * | 2019-10-18 | 2022-09-06 | 展讯通信（深圳）有限公司 | Starting device, power management chip and electronic equipment |
| WO2021128710A1 (en) * | 2019-12-26 | 2021-07-01 | 上海派能能源科技股份有限公司 | Battery power-on circuit |
| CN112882756A (en) * | 2021-01-18 | 2021-06-01 | 读书郎教育科技有限公司 | Intelligent classroom tablet system and method capable of achieving one-key startup |
| CN112925246A (en) * | 2021-01-29 | 2021-06-08 | 北京紫光展锐通信技术有限公司 | Starting-up control circuit and related device thereof |
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