CN107332952A - Mobile terminal and its circuit - Google Patents
Mobile terminal and its circuit Download PDFInfo
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- CN107332952A CN107332952A CN201710705593.5A CN201710705593A CN107332952A CN 107332952 A CN107332952 A CN 107332952A CN 201710705593 A CN201710705593 A CN 201710705593A CN 107332952 A CN107332952 A CN 107332952A
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- pin
- voltage
- stablizer
- input pin
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
- H04M1/233—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof including a pointing device, e.g. roller key, track ball, rocker switch or joystick
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Telephone Function (AREA)
Abstract
The invention discloses a kind of mobile terminal and its circuit, the circuit includes power management chip, indicator lamp driving chip, process chip and one-way conduction unit, power management chip includes main power supply output pin, voltage-stablizer input pin and voltage-stablizer output pin, and main power supply output pin is connected with voltage-stablizer input pin；Indicator lamp driving chip includes the first supply input pin, and the first supply input pin is connected with main power supply output pin；Process chip includes the second supply input pin, and the second supply input pin is connected with voltage-stablizer output pin；One-way conduction unit is connected on the supply access between main power supply output pin and the second supply input pin, and the one-way conduction unit is used to limit the main power supply output pin to the second supply input pin one-way flow.By the above-mentioned means, the present invention can avoid indicator lamp driving chip operation irregularity.
Description
Technical field
The present invention relates to electronic device field, more particularly to a kind of mobile terminal and its circuit.
Background technology
At present, the mobile terminal such as smart mobile phone turns into the necessity in people's daily life, the function of mobile terminal
Increasingly diversification.
Mobile terminal would generally set the indicator lamps such as breath light, the message under screen lock state be reminded, it is to avoid user
Missed messages, bring great convenience to user.But, the circuit design of current mobile terminal causes breath light to send out
It is raw abnormal, for example, breath light does not flash, brightness is dimmed etc., it is necessary to which restarting could recover after mobile terminal normally, more serious
In the case of, it still can not recover normal after mobile terminal is restarted, knowing that oneself have received and disappear when causing user anxious
Breath, has a strong impact on user and normally uses mobile terminal.
The content of the invention
The embodiment of the present invention provides a kind of mobile terminal and its circuit, can avoid indicator lamp driving chip operation irregularity.
The embodiment of the present invention use a technical scheme be：A kind of circuit of mobile terminal, the circuit includes power supply pipe
Chip, indicator lamp driving chip, process chip and one-way conduction unit are managed, power management chip includes main power supply output and drawn
Pin, voltage-stablizer input pin and voltage-stablizer output pin, main power supply output pin are connected with voltage-stablizer input pin；Indicator lamp
Driving chip includes the first supply input pin, and the first supply input pin is connected with main power supply output pin, so that power supply pipe
The main power supply output pin of reason chip is powered for indicator lamp driving chip；Process chip includes the second supply input pin, second
Supply input pin is connected with voltage-stablizer output pin, so that the main power supply output pin output voltage of power management chip is through electricity
Powered after the internal voltage regulator processing of source control chip for process chip；One-way conduction unit be connected to it is main power supply output pin with
On supply access between second supply input pin, the one-way conduction unit is used to limit the main power supply output pin extremely
The second supply input pin one-way flow.
The embodiment of the present invention use another technical scheme be：A kind of mobile terminal is provided, the mobile terminal includes upper
The circuit stated.
The beneficial effect of the embodiment of the present invention is：The embodiment of the present invention is by setting the circuit of mobile terminal to include power supply pipe
Chip, indicator lamp driving chip, process chip and one-way conduction unit are managed, power management chip includes main power supply output and drawn
Pin, voltage-stablizer input pin and voltage-stablizer output pin, main power supply output pin are connected with voltage-stablizer input pin；Indicator lamp
Driving chip includes the first supply input pin, and the first supply input pin is connected with main power supply output pin, so that power supply pipe
The main power supply output pin of reason chip is powered for indicator lamp driving chip；Process chip includes the second supply input pin, second
Supply input pin is connected with voltage-stablizer output pin, so that the main power supply output pin output voltage of power management chip is through electricity
Powered after the internal voltage regulator processing of source control chip for process chip；One-way conduction unit be connected to it is main power supply output pin with
On supply access between second supply input pin, the one-way conduction unit is used to limit the main power supply output pin extremely
The second supply input pin one-way flow, to avoid when main power supply output pin does not export supply voltage, from second
The voltage output of supply input pin to main power supply output pin causes indicator lamp driving chip operation irregularity, passes through above-mentioned side
Formula, the embodiment of the present invention can avoid indicator lamp driving chip operation irregularity.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the first embodiment of the circuit of mobile terminal of the present invention；
Fig. 2 is a kind of electrical block diagram of internal voltage regulator in the embodiment of the present invention；
Fig. 3 is the anticreep principle schematic of circuit first embodiment of mobile terminal of the present invention；
Fig. 4 is the structural representation of the second embodiment of the circuit of mobile terminal of the present invention；
Fig. 5 is the anticreep principle schematic of circuit second embodiment of mobile terminal of the present invention；
Fig. 6 is the structural representation of mobile terminal of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described.It is understood that specific embodiment described herein is only used for explaining the present invention, rather than to the limit of the present invention
It is fixed.It also should be noted that, it illustrate only part related to the present invention for the ease of description, in accompanying drawing and not all knot
Structure.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Term " first ", " second " in the present invention etc. are to be used to distinguish different objects, rather than specific suitable for describing
Sequence.In addition, term " comprising " and " having " and their any deformations, it is intended that covering is non-exclusive to be included.For example comprising
The step of process of series of steps or unit, method, system, product or equipment are not limited to list or unit, and
It is the step of alternatively also including not listing or unit, or alternatively also include for these processes, method, product or equipment
Intrinsic other steps or unit.
Referenced herein " embodiment " is it is meant that the special characteristic, structure or the characteristic that describe can be wrapped in conjunction with the embodiments
In at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Mobile terminal mentioned herein can be smart mobile phone, tablet personal computer, wearable smart machine etc..
Indicator lamp (such as breath light) is as a kind of function element of information alert, in the design of mobile terminal increasingly
It is universal, but because its function is relatively easy but the characteristics of its response speed and high reliability requirement so that it is to electrifying timing sequence
It is required that especially high.Because the usage scenario of indicator lamp is complex, such as under charged state, under holding state, information alert etc.
Require that indicator lamp can work under scene, to indicate various states.
Indicator lamp is typically by power management chip (PMIC, Power Management Integrated Circuit)
Main power supply output pin VPH_PWR power, the voltage output pin of battery is by connecting the internal electric source of power management chip
Voltage input pin VBAT provides power supply for power management chip, and the main power supply output pin VPH_PWR of power management chip is again
Supply voltage is exported to indicator lamp driving chip.
Become increasingly complex, cause in some scenarios with the design of mobile terminal, such as (crossing to put is under the scene put excessively
Refer to battery electric quantity completely depleted, in the case of charging equipment is connected, within a certain period of time, mobile terminal can not be opened
Machine is, it is necessary to could normal boot-strap after certain time of charging), the system of mobile terminal is not run also during connection charging equipment, such as
Electric leakage, which occurs, for fruit causes the problem of breath light dysfunction just occurs in electrical anomaly on breath light, and now needing to restart could be extensive
It is multiple, bad experience is brought to user.
Mobile terminal when connecting external charging equipment, can be by USB (Universal Serial Bus, it is general
Universal serial bus) interface is attached.
Mobile terminal is just entered after connection external charging equipment after being recognized for chip solution platform using charge type
The scheme of row charging, for example, the power management chip of high-pass platform is, it is necessary to recognize after charge type, the master of power management chip
Power supply output pin just has supply voltage output, and is the data pin by USB interface when carrying out charge type identification
Signal transmitting and receiving is identified judgement, therefore in charge type identification process is carried out the data pin D+ of USB interface, data
Voltage presence is had on pin D-, thus occurs data pin electric leakage to the main power supply output pin of power management chip
Situation, so as to cause the operation irregularity of indicator lamp driving chip.
For example, charge type can be SDP (standard down port), CDP (charging downlink port), DCP (special charging ends
Mouthful) etc..
The voltage for leaking off to main power supply output pin is typically smaller than the rated operational voltage of indicator lamp driving chip, can cause
Indicator lamp driving chip initialization exception, on the one hand, the brightness that indicator lamp is shown can be dark, on the other hand, indicator lamp does not have
The effect of flicker.In some cases, the voltage for leaking off to main power supply output pin is also possible to that indicator lamp driving chip can be more than
Rated operational voltage, cause indicator lamp driving chip or indicator lamp to burn.The embodiment of the present invention is by setting one-way conduction list
Member blocks the electric leakage, the description specifically seen below.
Referring to Fig. 1, Fig. 1 is the structural representation of the first embodiment of the circuit of mobile terminal of the present invention.In this implementation
In example, the circuit of mobile terminal can include：The circuit includes power management chip 11, indicator lamp driving chip 12, processing core
Piece 13, one-way conduction unit 14, indicator lamp 15, battery 16 and USB socket 17.
Power management chip 11 includes main power supply output pin 111, voltage-stablizer input pin 112, voltage-stablizer output pin
113rd, internal power source voltage input pin 114, outer power voltage input pin 115.
Internal voltage regulator 116 can be integrated with inside power management chip 11, the voltage-stablizer input pin 112 can be should
The input of internal voltage regulator 114, the voltage-stablizer output pin 113 can be the output end of internal voltage regulator 114.Main power supply is defeated
Go out pin 111 to be connected with voltage-stablizer input pin 112.
The internal voltage regulator 116 is used for defeated by voltage-stablizer after the voltage that main power supply output pin 111 is exported is handled
Go out pin 113 to be powered the element in mobile terminal.Specifically, main power supply output pin 111 can be exported
Voltage exports the element into mobile terminal after carrying out decompression processing or boosting processing.For example, the element in the mobile terminal
Can be the process chip 13 in mobile terminal, the description specifically seen below.
Alternatively, the internal voltage regulator 116 can be LDO (low dropout regulator, low pressure difference linearity voltage stabilizing
Device).For example, if the supply voltage that main power supply output pin 111 is exported is 5V, internal voltage regulator 116 can be by the voltage step-down
To be exported after 3.3V by voltage-stablizer output pin 113.
Referring to Fig. 2, Fig. 2 is a kind of electrical block diagram of internal voltage regulator in the embodiment of the present invention.In this implementation
In example, internal voltage regulator 116 includes current source is, diode D, comparator A, series connection adjustment pipe VT, the first sample resistance R1 with
And the second sample resistance R2.
Current source isPositive pole connection voltage-stablizer input pin 112, current source isNegative pole connection diode D negative pole, two
Pole pipe D plus earth.
First sample resistance R1 and the second sample resistance R2 are connected between voltage-stablizer output pin 113 and ground.It is specific and
Speech, the second sample resistance R2 first end connection voltage-stablizer output pin 113, the first sample resistance R1 first end connection second
Sample resistance R2 the second end, the first sample resistance R1 the second end ground connection.
Comparator A inverting input connection diode D negative pole.Comparator A normal phase input end connection first is sampled
Resistance R1 first end.
Series connection adjustment pipe VT can be P-channel field-effect transistor (PEFT) pipe.Series connection adjustment pipe VT control end connection comparator A output
End, series connection adjustment pipe VT the first path terminal connection voltage-stablizer input pin 112, series connection adjustment pipe VT alternate path end connection
Voltage-stablizer output pin 113.
Illustrate the operation principle of internal voltage regulator 116 below.
The voltage Uin of voltage-stablizer input pin 112 is applied to comparator A normal phase input end, anti-with being applied to comparator A
The reference voltage Uref (Uout*R2/ (R1+R2)) of phase input compares, and both differences are after amplifier A amplifications by comparing
Device A output end output control series connection adjustment pipe VT pressure drop, so that regulated output voltage.
When output voltage Uout is reduced, reference voltage Uref and sampling voltage Uin difference increase, comparator A outputs
Driving current increase, series connection adjustment pipe VT pressure drops reduce, so that output voltage Uout is raised.Wherein, output voltage Uout
Refer to the voltage on voltage-stablizer output pin 113.
Conversely, if output voltage Uout exceedes required setting value, the preceding driving current of comparator A outputs reduces, from
And make output voltage Uout reductions.In power supply process, output voltage correction is carried out continuously, and adjustment time is only by comparator A and string
The limitation of joint debugging homogeneous tube VT loops reaction speed.
Indicator lamp driving chip 12 includes the first supply input pin 121 and driving voltage output pin 122, the first power supply
Input pin 121 is connected with main power supply output pin 111, so that the main power supply output pin 111 of power management chip 11 is finger
Show that lamp driving chip 12 is powered.
Process chip 13 includes the second supply input pin 131, the first data pin 132 and the second data pin 133,
Second supply input pin 131 is connected with voltage-stablizer output pin 131, so that the main power supply output pin of power management chip 11
Internal voltage regulator 114 of 111 output voltages through power management chip 11 is powered after handling for process chip 13.
Alternatively, the process chip 13 can be application chip (AP, Application Processor), in other realities
Apply in example, process chip 13 can also be baseband chip (BP, Baseband Processor) or other process chips.
One-way conduction unit 14 is connected to the power supply between the main power supply supply input pin 131 of output pin 111 and second
On path.The supply access can power output pin 111- voltage-stablizer input pin 112- voltage-stablizer output pins 113- based on
Second supply input pin 131.One-way conduction unit 14 is used to limit main power supply output pin to the second supply input pin list
To circulation.
Specifically, one-way conduction unit 14 allows the electricity of the main power supply supply input of output pin 111 to the second pin 131
Stream passes through, to allow main power supply output pin 111 through internal voltage regulator 116 to the output voltage of the second supply input pin 131.
One-way conduction unit 14 blocks the second supply input pin 131 to the electric current of main power supply output pin 111, to avoid
When main power supply output pin 111 does not export supply voltage, the voltage output from the second supply input pin 131 to main power supply
Output pin 111 causes the operation irregularity of indicator lamp driving chip 12.
Indicator lamp 15 is connected with driving voltage output pin 122, the drive that indicator lamp 15 is exported in indicator lamp driving chip 12
Dynamic voltage effect is lower luminous.
Alternatively, indicator lamp 15 can be LED (light emitting diode, light emitting diode) lamp, in other realities
Apply in example, indicator lamp 15 can also be other light-emitting components.The positive pole connection driving voltage output pin 122, LED of LED
The negative pole ground connection of lamp.
Battery 16 is connected with the internal power source voltage input pin 114 of power management chip 11.Battery 16 is used to be power supply
Managing chip 11 provides operating voltage VBAT.The connection internal power source voltage of positive pole 161 output pin 114 of battery 16, battery 16
Negative pole 162 be grounded.
USB socket 17 includes the 3rd data pin 171, the 4th data pin 172, supply voltage pin 173 and first
Mode bit recognizes pin 174.Power management chip 11 further comprise the 5th data pin 117, the 6th data pin 118 and
Second mode bit recognizes pin 119.
First data pin 132 connects the 3rd data pin 171, and the second data pin 133 connects the 4th data pin
172。
5th data pin 116 is connected with the 3rd data pin 171, the 6th data pin 117 and the 4th data pin 172
Connection.
The 3rd data pin 171, the 4th data pin 172 of USB socket 17 are data wire positive pole D+ and data wire respectively
Negative pole D-.
Second state is connected for identification pin 118 with first state position identification pin 174.First state position identification pin
174 be the USB_ID pins of USB socket 17.
Alternatively, one-way conduction unit 14 is connected between main power supply output pin 111 and voltage-stablizer input pin 112.
One-way conduction unit 14 allows the electric current of main power supply output pin 111 to voltage-stablizer input pin 112 to pass through, unidirectionally
Onunit 14 blocks voltage-stablizer input pin 112 to the electric current of main power supply output pin 111.
Alternatively, one-way conduction unit 14 can be diode, and the positive pole 141 of diode connects main power supply output pin
111, the connection voltage-stablizer of negative pole 142 input pin 112 of diode.
In other embodiments, one-way conduction unit 14 can only allow the element of electric current one-way conduction for other.
Power management chip 11 also includes the first grounding pin 120, and USB socket 17 also includes the second grounding pin 175, place
Managing chip 13 also includes the 3rd grounding pin 134, the first grounding pin 120, the second grounding pin 175 and the 3rd grounding pin
134 are grounded.Ground connection described in text is all connected with same ground wire, namely all elements are altogether.
When USB socket 17 connects external charging equipment, power management chip 11 passes through the 5th data pin the 116, the 6th
Data pin 117 detects the charge type of external charging equipment, and external charging equipment passes through after completing to determine charge type
Supply voltage pin 173 and outer power voltage input pin 115 are that power management chip 11 is powered, and then main power supply output is drawn
The ability output voltage of pin 111 is to indicator lamp driving chip 12.The process of charge type detection before completing to determine charge type
In, it is to be realized by the communication between data pin, process chip 13 is the main frame as data communication, therefore all numbers
According to pin (the first data pin 132, the second data pin 133, the 3rd data pin 171, the 4th data pin the 172, the 5th number
According to pin 117, the 6th data pin 118) on the presence of voltage.
Described in brought forward, Fig. 3 is referred to incorporated by reference to Fig. 1, Fig. 3 is that the circuit first embodiment of mobile terminal of the present invention is anticreep
Principle schematic.
As shown in figure 3, dotted line represents the path of electric leakage, the voltage from external charging equipment is by the 3rd of USB socket 17
Data pin 171, the 4th data pin 172 leak off to the first data pin 132 and the second data pin of process chip 13
133, in the case that process chip 13 has voltage in the first data pin 132 and the second data pin 133, the can be leaked off to
On two supply input pins 131, the second supply input pin 131 leaks off to voltage-stablizer output pin 113 again, then leaks off to again
Voltage-stablizer input pin 112, because the electric current of voltage-stablizer input pin 112 to main power supply output pin 111 is by one-way conduction list
Member 14 is blocked, therefore, it is impossible to further leak off to main power supply output pin 111, will not cause the first of indicator lamp driving chip 12
Beginningization is abnormal.
In addition, after determination charge type is completed, the main power supply normal output voltage of output pin 111 is supplied due to main
The electric current of electricity output pin 111 to voltage-stablizer input pin 112 be one-way conduction unit 14 allow by, therefore, Bu Huiying
It is that process chip 13 is powered to ring power management chip 11.
Referring to Fig. 4, Fig. 4 is the structural representation of the circuit second embodiment of mobile terminal of the present invention.
In the present embodiment, one-way conduction unit 24 is again connected to the main power supply supply input of output pin 111 and second
On supply access between pin 131.
Difference is that in the present embodiment, one-way conduction unit 24 is connected to voltage-stablizer output pin 113 and second
Between supply input pin 131, one-way conduction unit 24 allows the supply input pin 131 of voltage-stablizer output pin 113 to the second
Electric current pass through, one-way conduction unit 24 block the second supply input pin 131 to voltage-stablizer output pin 113 electric current.
Alternatively, one-way conduction unit 24 is diode, and the positive pole connection voltage-stablizer output pin 113 of the diode should
The negative pole of diode connects the second supply input pin 131,.
In other embodiments, one-way conduction unit 24 can only allow the element of electric current one-way conduction, this hair for other
Bright embodiment is not limited this.
Described in brought forward, Fig. 5 is referred to incorporated by reference to Fig. 4, Fig. 5 is that the circuit second embodiment of mobile terminal of the present invention is anticreep
Principle schematic.
As shown in figure 5, dotted line represents the path of electric leakage, the voltage from external charging equipment is by the 3rd of USB socket 17
Data pin 171, the 4th data pin 172 leak off to the first data pin 132 and the second data pin of process chip 13
133, in the case that process chip 13 has voltage in the first data pin 132 and the second data pin 133, the can be leaked off to
On two supply input pins 131, due to the electric current coverlet guide of the second supply input pin 131 to voltage-stablizer output pin 113
Logical element 24 is blocked, and will not continue to leak off to voltage-stablizer input pin 112, therefore, it is impossible to further leak off to main power supply output
Pin 111, will not cause the initialization exception of indicator lamp driving chip 12.
In addition, after determination charge type is completed, the main power supply normal output voltage of output pin 111, voltage-stablizer is defeated
The electric current for going out the supply input of pin 113 to the second pin 131 is that one-way conduction unit 24 allows by therefore, not interfering with
Power management chip 11 is that process chip 13 is powered.
Referring to Fig. 6, Fig. 6 is the structural representation of mobile terminal of the embodiment of the present invention.In the present embodiment, mobile terminal
20 include circuit 21, and the circuit 21 can be the circuit described in above-mentioned any one embodiment.
The embodiment of the present invention is by setting the circuit of mobile terminal to include power management chip, indicator lamp driving chip, place
Chip and one-way conduction unit are managed, power management chip includes main power supply output pin, voltage-stablizer input pin and voltage stabilizing
Device output pin, main power supply output pin is connected with voltage-stablizer input pin；Indicator lamp driving chip includes the first supply input
Pin, the first supply input pin is connected with main power supply output pin, so that the main power supply output pin of power management chip is
Indicator lamp driving chip is powered；Process chip includes the second supply input pin, and the second supply input pin is exported with voltage-stablizer
Pin is connected, so that at main internal voltage regulator of the power supply output pin output voltage through power management chip of power management chip
Powered after reason for process chip；One-way conduction unit is connected to the confession between main power supply output pin and the second supply input pin
On electric pathway, the one-way conduction unit is unidirectional to the second supply input pin for limiting the main power supply output pin
Circulation, to avoid when main power supply output pin does not export supply voltage, the voltage output from the second supply input pin is extremely
Main power supply output pin causes indicator lamp driving chip operation irregularity, by the above-mentioned means, the embodiment of the present invention can avoid referring to
Show lamp driving chip operation irregularity.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, is included within the scope of the present invention.
Claims (10)
1. a kind of circuit of mobile terminal, it is characterised in that the circuit includes：
Power management chip, including main power supply output pin, voltage-stablizer input pin and voltage-stablizer output pin, the main confession
Electricity output pin is connected with the voltage-stablizer input pin；
Indicator lamp driving chip, including the first supply input pin, the first supply input pin are exported with the main power supply
Pin is connected, and is powered so that the main power supply output pin of the power management chip is the indicator lamp driving chip；
Process chip, including the second supply input pin, the second supply input pin connect with the voltage-stablizer output pin
Connect, so that main internal voltage regulator of the power supply output pin output voltage through the power management chip of the power management chip
It is that the process chip is powered after processing；
One-way conduction unit, is connected to the supply access between the main power supply output pin and the second supply input pin
On, the one-way conduction unit is used to limit the main power supply output pin to the second supply input pin one-way flow.
2. circuit according to claim 1, it is characterised in that the one-way conduction unit is connected to the main power supply output
Between pin and the voltage-stablizer input pin, the one-way conduction unit allows the main power supply output pin to the voltage stabilizing
The electric current of device input pin passes through, and the one-way conduction unit blocks the voltage-stablizer input pin to the main power supply output to draw
The electric current of pin.
3. circuit according to claim 2, it is characterised in that the one-way conduction unit is diode, the diode
Positive pole connect the main power supply output pin, negative pole connects the voltage-stablizer input pin.
4. circuit according to claim 1, it is characterised in that the one-way conduction unit is connected to the voltage-stablizer output
Between pin and the second supply input pin, the one-way conduction unit allows the voltage-stablizer output pin to described the
The electric current of two supply input pins passes through, and the one-way conduction unit blocks the second supply input pin to the voltage-stablizer
The electric current of output pin.
5. circuit according to claim 4, it is characterised in that the one-way conduction unit is diode, the diode
Positive pole connect the voltage-stablizer output pin, negative pole connects the second supply input pin.
6. the circuit according to claim 1-5 any one, it is characterised in that the process chip further comprises first
Data pin and the second data pin, the circuit further comprise USB socket, and the USB socket includes the 3rd data pin
With the 4th data pin, first data pin connects the 3rd data pin, and the second data pin connection is described
4th data pin.
7. circuit according to claim 6, it is characterised in that the power management chip further comprises internal electric source electricity
Press input pin and outer power voltage input pin, the mobile terminal further comprises battery, the battery with it is described interior
Portion's supply voltage input pin connection, the USB socket further comprises supply voltage pin, the supply voltage pin and institute
State the connection of outer power voltage input pin.
8. circuit according to claim 7, it is characterised in that
The power management chip further comprises the 5th data pin and the 6th data pin, the 5th data pin and institute
The connection of the 3rd data pin is stated, the 6th data pin is connected with the 4th data pin,
When the USB socket connects external charging equipment, the power management chip passes through the 5th data pin, the 6th data
Pin detects the charge type of the external charging equipment, it is determined that the external charging equipment passes through after the charge type
The supply voltage pin and the outer power voltage input pin are that the power management chip is powered.
9. circuit according to claim 1, it is characterised in that the indicator lamp driving chip further comprises driving voltage
Output pin, the circuit further comprises indicator lamp, and the indicator lamp is connected with the driving voltage output pin.
10. a kind of mobile terminal, it is characterised in that the mobile terminal includes the circuit described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705593.5A CN107332952B (en) | 2017-08-16 | 2017-08-16 | Mobile terminal and circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705593.5A CN107332952B (en) | 2017-08-16 | 2017-08-16 | Mobile terminal and circuit thereof |
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| CN107332952B CN107332952B (en) | 2020-09-04 |
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