CN106410758A - Voltage conversion device and mobile terminal - Google Patents
Voltage conversion device and mobile terminal Download PDFInfo
- Publication number
- CN106410758A CN106410758A CN201611013744.2A CN201611013744A CN106410758A CN 106410758 A CN106410758 A CN 106410758A CN 201611013744 A CN201611013744 A CN 201611013744A CN 106410758 A CN106410758 A CN 106410758A
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- China
- Prior art keywords
- unit
- voltage conversion
- voltage
- conversion device
- manostat
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
Abstract
The present invention provides a voltage conversion device and a mobile terminal. The voltage conversion device comprises a voltage conversion unit, a clamping unit, a switching unit, a voltage stabilization unit and a control unit; the clamping unit and the voltage stabilization unit are connected with the voltage input end of the voltage conversion unit; the switching unit is connected with the clamping unit and the voltage stabilization unit; the voltage stabilization unit, the control unit and the voltage conversion unit are connected in order; when the voltage input end of the voltage conversion unit is powered down, the clamping unit triggers the closure of the switching unit to allow the voltage stabilization unit to output the predetermined level to the control unit; and the control unit controls the closure of the voltage conversion unit according to the predetermined level. The voltage conversion device and the mobile terminal can prevent the power in the load from flowing back in the voltage conversion unit when the voltage input end of the voltage conversion unit is powered down, and have the beneficial effect on avoiding the load flow backward or abnormal power pumping to the load.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of voltage conversion device and mobile terminal.
Background technology
At present in the terminal, anti-back flow circuit is directly connected switching tube and is added in the outfan of voltage conversion circuit,
In addition corresponding drive control circuit is constituted, to prevent load or external equipment input or to pour in down a chimney in voltage conversion circuit, right
Voltage conversion circuit abnormal discharge causes damage.
Present mobile electrical equipment or be supported on the reliability not affecting that device parameters or user use, safety, outward
On the premise of sight, input current is done greatly as far as possible, in order to shorten the charging interval, improve up time and the side of mobile device
Just, motility.Thus the switching tube of the outfan being serially connected in voltage conversion circuit is put forward higher requirement, switching tube
Parameter type selecting will directly influence efficiency, temperature rise, output ripple, wiring space, cost, or even can give appearance design, and device selects
Type brings challenges.
Therefore, prior art existing defects, need to improve.
Content of the invention
The embodiment of the present invention provides a kind of voltage conversion device and mobile terminal, to solve in prior art in voltage conversion
The technical problem pouring in down a chimney or taking out electricity to voltage conversion unit for the load end during input port power down of unit.
Embodiments provide a kind of voltage conversion device, including：Voltage conversion unit, clamping unit, switch are single
Unit, voltage regulation unit and control unit；Described clamping unit, voltage regulation unit are all connected with the voltage input end of voltage conversion unit
Connect, described switch element is connected with clamping unit and voltage regulation unit respectively, described voltage regulation unit, control unit and described electricity
Pressure converting unit is sequentially connected；
When the voltage input end power down of voltage conversion unit, described clamping unit trigger switch unit cut-off, so that
Obtain described voltage regulation unit and export predetermined level to described control unit, described control unit is changed according to predetermined level control voltage
Unit ends.
The embodiment of the present invention additionally provides a kind of mobile terminal, including the voltage conversion device described in any of the above-described.
The present invention is all connected with the voltage input end of voltage conversion unit by clamping unit, voltage regulation unit, described switch
Unit is connected with clamping unit and voltage regulation unit respectively, described voltage regulation unit, control unit and described voltage conversion unit
It is sequentially connected, when the voltage input end power down of voltage conversion unit, the voltage on clamping unit reduces, thus trigger switch list
Unit's cut-off, so that the voltage regulation unit of voltage regulation unit exports predetermined level to control unit, control unit is according to this predetermined electricity
Flat control voltage converting unit cut-off, thus electricity when reaching the voltage input end power down avoiding voltage conversion unit, in load
Flow back in voltage conversion unit, have to prevent from loading and pour in down a chimney or to the improper beneficial effect taking out electricity of load.
Brief description
Fig. 1 is the structure chart of one of one embodiment of the present invention voltage conversion device.
Fig. 2 is the structure chart of another kind of voltage conversion device in one embodiment of the present invention.
Specific embodiment
Refer to schema, below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention
It is clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole
Embodiment.Based on the embodiment in the present invention, those skilled in the art are obtained under the premise of not making creative work
Every other embodiment, broadly falls into the scope of protection of the invention.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " up time
The orientation of instruction such as pin ", " counterclockwise " or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of
The description present invention and simplification describe, rather than the device of instruction or hint indication or element must have specific orientation, Yi Te
Fixed azimuth configuration and operation, are therefore not considered as limiting the invention.Additionally, term " first ", " second " are only used for
Description purpose, and it is not intended that indicating or hint relative importance or the implicit quantity indicating indicated technical characteristic.
Thus, define " first ", the feature of " second " can be expressed or implicitly include one or more described feature.?
In description of the invention, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be mechanical connection or electrical connection or can mutually communicate；Can be to be joined directly together it is also possible to pass through between intermediary
Connect connected, can be the connection of two element internals or the interaction relationship of two elements.Ordinary skill for this area
For personnel, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score
The first and second feature directly contacts can be included not to be directly contact but passes through it is also possible to include the first and second features
Between other characterisation contact.And, fisrt feature second feature " on ", that " top " and " above " include first is special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention.In order to
Simplify disclosure of the invention, hereinafter the part and setting of specific examples is described.Certainly, they are only merely illustrative, and
And purpose does not lie in the restriction present invention.Additionally, the present invention can in different examples repeat reference numerals and/or reference letter,
This repeat to be for purposes of simplicity and clarity, itself do not indicate discussed various embodiment and/or setting between
Relation.Additionally, the invention provides various specific technique and material example, but those of ordinary skill in the art are permissible
Recognize the application of other techniques and/or the use of other materials.
The voltage conversion device that the present invention provides is mainly used in the mobile terminals such as IPAD, mobile phone, this voltage conversion device
Can be used in the charging circuit of mobile terminal.
Refer to Fig. 1, in the preferred embodiment, this voltage conversion device includes：Voltage conversion unit 10, clamping unit
20th, switch element 30, voltage regulation unit 40 and control unit 50.Clamping unit 20, voltage regulation unit 30 are all and voltage conversion unit
10 voltage input end 11 connects, and switch element 30 is connected with clamping unit 20, voltage regulation unit 40 and ground wire respectively, voltage stabilizing list
Unit 40, control unit 50 and voltage conversion unit 10 are sequentially connected.
When voltage input end 11 power down of voltage conversion unit 10, clamping unit 20 trigger switch unit 30 ends, from
And making voltage regulation unit 40 export predetermined level to control unit 50, control unit 50 is changed single according to predetermined level control voltage
Unit 10 cut-off.
Wherein, this voltage conversion unit 10 can be boosting unit or pressure unit or step-up/down list
Unit, the Power convert that it is used for inputting input power 100 is the voltage of predefined size and exports to load 200.This voltage turns
Changing unit 10 can be voltage conversion circuit or voltage conversion chip, to realize its voltage conversion function.
Please also refer to Fig. 2, this clamping unit 20 be clamp circuit, it include Zener diode DZ1,3rd resistor R3 with
And the 4th resistance R4.The negative pole of this Zener diode DZ1 is connected with the voltage input end of this voltage conversion unit 10.This voltage stabilizing two
The positive pole of pole pipe DZ1 is connected with one end of one end of this 3rd resistor R3 and the 4th resistance R4.This 3rd resistor R3 another
One end is connected with the control end of this switch element 30.The other end ground connection of the 4th resistance R4.
This switch element 30 includes audion Q1 and diode D1, and this audion Q1 can also for crystal triode
For field-effect transistor.In the present embodiment, this audion Q1 is field-effect transistor, the drain electrode of this audion Q1 and voltage stabilizing list
The earth terminal of unit 40 connects, and the source electrode of this audion Q1 is connected with the positive pole of this diode D1, the minus earth of this diode D1.
The grid of this audion Q1 is connected with one end of this 3rd resistor R3.It is to be appreciated that this switch element 30 can also only include
One audion Q1, this diode D1 can omit.
This voltage regulation unit 40 includes manostat U1 and partial pressure unit, wherein, this manostat U1 have grounding ports GND,
Input port VIN and output port VOUT.This input port VIN is connected with one end of this partial pressure unit, this partial pressure unit
The other end is connected with the control source port of this voltage conversion unit 10.This partial pressure unit includes first resistor R1 parallel with one another
And second resistance R2.This grounding ports GND is connected with audion Q1.This output port OUT and the Enable Pin of control unit 50
Mouth connects.This manostat U1 can be low pressure difference linear voltage regulator.It is to be appreciated that this voltage regulation unit 40 can also only include surely
Depressor U1, and this partial pressure unit can be omitted.
This control unit 50 is control chip, and it is used for output control signal to voltage conversion unit 10, to control this electricity
Pressure converting unit 10 on or off.
It is to be appreciated that this voltage conversion device can also include the first filter capacitor C1, the one of the first filter capacitor C1
End is connected with the output port VOUT of manostat U1, the other end ground connection of the first filter capacitor C1.
It is to be appreciated that this voltage conversion device can also include the second filter capacitor C2, the one of the second filter capacitor C2
End is connected with the input port VOUT of manostat U1, the other end ground connection of the second filter capacitor C2.
When voltage input end 11 power down of voltage conversion unit 10, the voltage on clamping unit 20 reduces, thus triggering
Switch element 30 ends, so that grounding ports GND of the manostat U1 of this voltage regulation unit 40 cannot be grounded, so that surely
The output port VOUT of the manostat U1 of pressure unit 40 exports predetermined level to control unit 50, in the present embodiment for low electricity
Flat.Control unit 50 is ended according to this predetermined level control voltage converting unit 10, thus reach avoiding voltage conversion unit 10
Voltage input end power down when, the electricity in load flows back in voltage conversion unit 10, has and prevents load from pouring in down a chimney or to negative
Carry the improper beneficial effect taking out electricity.
The embodiment of the present invention additionally provides a kind of mobile terminal, and it includes the voltage conversion device in above-described embodiment.
In sum although the present invention is disclosed above with preferred embodiment, but above preferred embodiment and be not used to limit
The present invention processed, those of ordinary skill in the art, without departing from the spirit and scope of the present invention, all can make various change and profit
Decorations, therefore protection scope of the present invention is defined by the scope that claim defines.
Claims (10)
1. a kind of voltage conversion device is it is characterised in that include：Voltage conversion unit, clamping unit, switch element, voltage stabilizing list
Unit and control unit；Described clamping unit, voltage regulation unit are all connected with the voltage input end of voltage conversion unit, described switch
Unit is connected with clamping unit and voltage regulation unit respectively, described voltage regulation unit, control unit and described voltage conversion unit
It is sequentially connected；
When the voltage input end power down of voltage conversion unit, described clamping unit trigger switch unit cut-off, so that institute
State voltage regulation unit and export predetermined level to described control unit, described control unit is according to predetermined level control voltage converting unit
Cut-off.
2. voltage conversion device according to claim 1 is it is characterised in that described voltage regulation unit includes manostat, described
The input port of manostat is connected with the control source port of described voltage conversion unit, the output port of described manostat and control
Unit processed connects, and the grounding ports of described manostat are connected with described switch element.
3. voltage conversion device according to claim 2 is it is characterised in that described voltage regulation unit also includes partial pressure unit,
The input port of described manostat is connected with the control source port of described voltage conversion unit by described partial pressure unit.
4. voltage conversion device according to claim 3 is it is characterised in that described partial pressure unit includes the first electricity of parallel connection
Resistance and second resistance.
5. the voltage conversion device according to Claims 2 or 3 is it is characterised in that also include the first filter capacitor, and described
One end of one filter capacitor is connected with the output port of described manostat, the other end ground connection of described first filter capacitor.
6. the voltage conversion device according to Claims 2 or 3 is it is characterised in that also include the second filter capacitor, and described
One end of two filter capacitors is connected with the input port of described manostat, the other end ground connection of described second filter capacitor.
7. the voltage conversion device according to Claims 2 or 3 is it is characterised in that described manostat is that low pressure difference linearity is steady
Depressor.
8. voltage conversion device according to claim 1 it is characterised in that described clamping unit include Zener diode,
3rd resistor and the 4th resistance, the negative pole of described Zener diode is connected with the voltage input end of described voltage conversion unit,
The positive pole of described Zener diode is connected with one end of one end of 3rd resistor and the 4th resistance, described 3rd resistor another
End is connected with switch element, the other end ground connection of described 4th resistance.
9. voltage conversion device according to claim 1 is it is characterised in that described switch element includes audion and two
Pole pipe, the control end of described audion is connected with described clamping unit, the input of described audion and described voltage regulation unit
Grounding ports connect, and the outfan of described audion is connected with the positive pole of described diode, the minus earth of described diode.
10. a kind of mobile terminal is it is characterised in that include the voltage conversion device described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611013744.2A CN106410758B (en) | 2016-11-17 | 2016-11-17 | Voltage conversion device and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611013744.2A CN106410758B (en) | 2016-11-17 | 2016-11-17 | Voltage conversion device and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106410758A true CN106410758A (en) | 2017-02-15 |
| CN106410758B CN106410758B (en) | 2019-06-25 |
Family
ID=58068471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611013744.2A Active CN106410758B (en) | 2016-11-17 | 2016-11-17 | Voltage conversion device and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106410758B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4864213A (en) * | 1987-12-11 | 1989-09-05 | Nec Corporation | DC supply having low and high constant voltages for powering a polarity inverter controller |
| CN203026919U (en) * | 2012-11-29 | 2013-06-26 | 无锡市金赛德电子有限公司 | Input under-voltage protection circuit of photovoltaic inverter power supply |
| CN203368107U (en) * | 2013-08-09 | 2013-12-25 | 向智勇 | Charger with overvoltage and overcurrent protection function |
| CN104102318A (en) * | 2013-04-15 | 2014-10-15 | 鸿富锦精密电子(天津)有限公司 | Power source circuit |
-
2016
- 2016-11-17 CN CN201611013744.2A patent/CN106410758B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4864213A (en) * | 1987-12-11 | 1989-09-05 | Nec Corporation | DC supply having low and high constant voltages for powering a polarity inverter controller |
| CN203026919U (en) * | 2012-11-29 | 2013-06-26 | 无锡市金赛德电子有限公司 | Input under-voltage protection circuit of photovoltaic inverter power supply |
| CN104102318A (en) * | 2013-04-15 | 2014-10-15 | 鸿富锦精密电子(天津)有限公司 | Power source circuit |
| CN203368107U (en) * | 2013-08-09 | 2013-12-25 | 向智勇 | Charger with overvoltage and overcurrent protection function |
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| Publication number | Publication date |
|---|---|
| CN106410758B (en) | 2019-06-25 |
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| CB02 | Change of applicant information |
Address after: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant before: Guangdong OPPO Mobile Communications Co., Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |