CN102082505A - Booster charge pump and boosting method thereof and mobile terminal - Google Patents
Booster charge pump and boosting method thereof and mobile terminal Download PDFInfo
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- CN102082505A CN102082505A CN2010105964255A CN201010596425A CN102082505A CN 102082505 A CN102082505 A CN 102082505A CN 2010105964255 A CN2010105964255 A CN 2010105964255A CN 201010596425 A CN201010596425 A CN 201010596425A CN 102082505 A CN102082505 A CN 102082505A
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Abstract
The invention discloses a booster charge pump and a boosting method thereof and a mobile terminal. The booster charge pump comprises a first capacitor, a second capacitor, a controller and a plurality of selector switches which are controlled by the controller, wherein the controller is used for controlling the on-off of the selector switches, so that the booster charge pump circulates in a charging state, a first boosting state and a second boosting state in turn; when the booster charge pump is in the charging state, an input port, the first capacitor, the second capacitor and a grounding port are electrically communicated with one another; when the booster charge pump is in the first boosting state, the input port, the first capacitor and an output port are electrically communicated with one another; and when the booster charge pump is in the second boosting state, the input port, the first capacitor, the second capacitor and the output port electrically communicated with one another by the controller. The booster charge pump is sequentially switched among the charging state, the first boosting state and the second boosting state in a circulating way, so that the voltage of the output end is improved by 1.33 times.
Description
Technical field
The present invention relates to a kind of low power pressure build-up technique, particularly a kind of boosting charge pump and its step-up method and portable terminal.
Background technology
In the handheld terminal circuit design field, the terminal main electricity is generally lithium ion battery or Ni-MH battery.But in physical circuit because of the difference of each circuit module power reguirements, the circuit that has need input power supply step-down, and then needing of having boosts, and boost and the amplitude of step-down lower, generally need to realize that by the chip of regulation this makes that the cost of terminal is higher.
Thereby prior art is still waiting to improve and improve.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of boosting charge pump and its step-up method and portable terminal, the input supply voltage of terminal can be raise 1.33 times, power to terminal.
In order to achieve the above object, the present invention has taked following technical scheme:
A kind of boosting charge pump, wherein, comprise first electric capacity, second electric capacity, controller and a plurality of diverter switch that is controlled by the controller, described controller is used to control described diverter switch respectively and the conducting state between input port, grounding ports and the output port of first electric capacity, second electric capacity, boosting charge pump, makes boosting charge pump successively at charged state, pressure-increasning state and circulating in the pressure-increasning state for the second time for the first time; Wherein: when boosting charge pump was in charged state, controller was controlled described input port, first electric capacity, second electric capacity and is connected successively with grounding ports, and made output port floating empty; When boosting charge pump was in for the first time pressure-increasning state, controller controlled that described input port is connected with the negative pole of first electric capacity, the positive pole of first electric capacity is connected with described output port, and makes second electric capacity float sky; When boosting charge pump is in for the second time pressure-increasning state, controller makes that described input port is connected with the positive pole of first electric capacity, the negative pole of first electric capacity is connected with the negative pole of second electric capacity, the positive pole of second electric capacity is connected with described output port, and makes grounding ports floating empty.
Described boosting charge pump wherein, also comprises the 3rd electric capacity, and an end of described the 3rd electric capacity is connected with described output port, other end ground connection.
Described boosting charge pump, wherein, described diverter switch comprises first diverter switch, second diverter switch, the 3rd diverter switch, the 4th diverter switch, the 5th diverter switch, the 6th diverter switch, the 7th diverter switch and the 8th diverter switch; Wherein: the first input end of the first input end of described first diverter switch and second diverter switch is connected with described input port respectively, and the output of first diverter switch is connected with the positive pole of described first electric capacity and the first input end of the 3rd diverter switch respectively; The output of described second diverter switch is connected with the negative pole of described first electric capacity, the first input end of the 4th diverter switch and the first input end of the 5th diverter switch respectively; The output of described the 3rd diverter switch is connected with the output of described the 4th diverter switch, the first input end of the 6th diverter switch and the first input end of the 7th diverter switch respectively; The output of described the 5th diverter switch is connected with the negative pole of second electric capacity and the first input end of the 8th diverter switch respectively; The output of described the 6th diverter switch connects the positive pole of second electric capacity; The output of the 7th diverter switch is connected with described output port, the output head grounding of the 8th diverter switch; Second input of second input of second input of first diverter switch, second input of second diverter switch, the 3rd diverter switch, second input of the 4th diverter switch, the 5th diverter switch, second input of the 6th diverter switch, second input of the 7th diverter switch, second input of the 8th diverter switch are connected with described controller respectively.
Described boosting charge pump, wherein, described diverter switch is a speed-sensitive switch.
The method that a kind of boosting charge pump realization is boosted wherein, comprising:
A, be connected successively with grounding ports, and make the output port of boosting charge pump floating empty, give described boosting charge pump charging by input port, first electric capacity, second electric capacity of controller control boosting charge pump;
B, control by controller that described input port is connected with the negative pole of first electric capacity, the positive pole of first electric capacity is connected with described output port, and make second electric capacity floating empty, boost for described boosting charge pump for the first time;
C, make by controller that described input port is connected with the positive pole of first electric capacity, the negative pole of first electric capacity is connected with the negative pole of second electric capacity, the positive pole of second electric capacity is connected with described output port, and make grounding ports floating empty, boost for boosting charge pump for the second time, then execution in step A.
Described method, wherein, the output end voltage of boosting charge pump is 1.33 times of its input terminal voltage.
Described method, wherein, the charged state of described boosting charge pump, pressure-increasning state and the voltage employing kirchhoff voltage theorem acquisition of pressure-increasning state for the second time for the first time.
A kind of portable terminal, wherein, in described portable terminal, be provided with boosting charge pump, described boosting charge pump comprises first electric capacity, second electric capacity, controller and a plurality of diverter switch that is controlled by the controller, described controller is used to control described diverter switch respectively and the conducting state between input port, grounding ports and the input port of first electric capacity, second electric capacity, boosting charge pump, makes boosting charge pump successively at charged state, pressure-increasning state and circulating in the pressure-increasning state for the second time for the first time; Wherein: when boosting charge pump was in charged state, controller was controlled described input port, first electric capacity, second electric capacity and is connected successively with grounding ports, and made output port floating empty; When boosting charge pump was in for the first time pressure-increasning state, controller controlled that described input port is connected with the negative pole of first electric capacity, the positive pole of first electric capacity is connected with described output port, and makes second electric capacity float sky; When boosting charge pump is in for the second time pressure-increasning state, controller makes that described input port is connected with the positive pole of first electric capacity, the negative pole of first electric capacity is connected with the negative pole of second electric capacity, the positive pole of second electric capacity is connected with described output port, and makes grounding ports floating empty.
Described portable terminal wherein, comprises that boosting charge pump also comprises the 3rd electric capacity, and an end of described the 3rd electric capacity is connected with described output port, other end ground connection.
Described portable terminal, wherein, described diverter switch comprises first diverter switch, second diverter switch, the 3rd diverter switch, the 4th diverter switch, the 5th diverter switch, the 6th diverter switch, the 7th diverter switch and the 8th diverter switch; Wherein: the first input end of the first input end of described first diverter switch and second diverter switch is connected with described input port respectively, and the output of first diverter switch is connected with the positive pole of described first electric capacity and the first input end of the 3rd diverter switch respectively; The output of described second diverter switch is connected with the negative pole of described first electric capacity, the first input end of the 4th diverter switch and the first input end of the 5th diverter switch respectively; The output of described the 3rd diverter switch is connected with the output of described the 4th diverter switch, the first input end of the 6th diverter switch and the first input end of the 7th diverter switch respectively; The output of described the 5th diverter switch is connected with the negative pole of second electric capacity and the first input end of the 8th diverter switch respectively; The output of described the 6th diverter switch connects the positive pole of second electric capacity; The output of the 7th diverter switch is connected with described output port, the output head grounding of the 8th diverter switch; Second input of second input of second input of first diverter switch, second input of second diverter switch, the 3rd diverter switch, second input of the 4th diverter switch, the 5th diverter switch, second input of the 6th diverter switch, second input of the 7th diverter switch, second input of the 8th diverter switch are connected with described controller respectively.
A kind of boosting charge pump provided by the invention and its step-up method and portable terminal, by the controller control its switch respectively and the conducting state between input port, grounding ports and the input port of first electric capacity, second electric capacity, boosting charge pump, make boosting charge pump successively in charged state, the pressure-increasning state and the switching that circulates in the pressure-increasning state second time for the first time, thereby provide a kind of 1.33 times boosting charge pump, and the electronic component of the use of this charge pump is few, and cost is low.
Description of drawings
The schematic diagram of the boosting charge pump that Fig. 1 provides for the embodiment of the invention.
The charged state figure of the boosting charge pump that Fig. 2 provides for the embodiment of the invention.
The first pressure-increasning state figure of the boosting charge pump that Fig. 3 provides for the embodiment of the invention.
The second pressure-increasning state figure of the boosting charge pump that Fig. 4 provides for the embodiment of the invention.
The method flow diagram that Fig. 5 boosts for the boosting charge pump realization that the embodiment of the invention provides.
Embodiment
The invention provides a kind of boosting charge pump and its step-up method and portable terminal, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below with reference to accompanying drawing and give an actual example that the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, the boosting charge pump that the embodiment of the invention provides is a kind of boosting charge pump of low range, and it comprises first capacitor C 1, second capacitor C 2, controller and a plurality of diverter switch, and all control of controlled device of these diverter switches.
Described controller is used for the on off operating mode of control its switch, thereby control the conducting state between input port VIN, grounding ports and the output port VOUT of first capacitor C 1, second capacitor C 2 and boosting charge pump, make boosting charge pump successively charged state (being state one), pressure-increasning state (being state two) and circulate in the pressure-increasning state for the second time (being state three) for the first time.
See also Fig. 2, when boosting charge pump is in charged state, controller is controlled between described input port VIN, first capacitor C 1, second capacitor C 2 and the grounding ports and is connected successively, and make output port VOUT floating empty, this moment first capacitor C 1 and series connection of second capacitor C 2, and charge for their by the input power supply.
See also Fig. 3, when boosting charge pump was in for the first time pressure-increasning state, controller controlled that described input port VIN is connected with the negative pole of first capacitor C 1, the positive pole of first capacitor C 1 is connected with described output port VOUT, and makes second capacitor C 2 float sky.First capacitor C 1 that this moment, the diverter switch handle linked to each other with the input power supply and 2 disconnections of second capacitor C, and make the positive pole of first capacitor C 1 be forwarded to output port VOUT realization charge pump to boost for the first time.
See also Fig. 4 when boosting charge pump is in for the second time pressure-increasning state, controller makes that described input port VIN is connected with the positive pole of first capacitor C 1, the negative pole of first capacitor C 1 is connected with the negative pole of second capacitor C 2, the positive pole of second capacitor C 2 is connected with described output port VOUT, and makes grounding ports floating empty.At this moment, first capacitor C 1 and 2 series connection of second capacitor C, and be series between input port VIN and the output port VOUT and realize boosting for the second time, wherein first capacitor C 1 is reversed access in this course, promptly the positive pole of first capacitor C 1 is connected to input port VIN, and the positive pole of second capacitor C 2 is connected to output port VOUT.
In the present embodiment, after the second time of boosting charge pump, boost action was finished, rapidly the circuit connection is switched to charged state by diverter switch again, thereby enter next circulation.
Continuity for the output voltage that keeps boosting charge pump is parallel with the 3rd capacitor C 3 at the output port VOUT place of described boosting charge pump, and wherein, an end of described the 3rd capacitor C 3 is connected other end ground connection with described output port VOUT.
Please continue to consult Fig. 1, in order to ensure boosting charge pump in charged state, for the first time pressure-increasning state and Rapid Cycle in the pressure-increasning state for the second time, described diverter switch is a speed-sensitive switch, this speed-sensitive switch is a prior art in the utilization of electron trade, and speed-sensitive switch has become the professional term of this area, does not do in detail herein.
Certainly in other embodiments, this diverter switch can also adopt relay switch, and just the speed of relay switch action is slower than the speed that speed-sensitive switch switches.
Please consult Fig. 1 once more, in the present embodiment, described diverter switch is eight, is respectively first diverter switch, second diverter switch, the 3rd diverter switch, the 4th diverter switch, the 5th diverter switch, the 6th diverter switch, the 7th diverter switch and the 8th diverter switch.
Wherein, the first input end of the first input end of described first diverter switch and second diverter switch is connected with described input port VIN respectively, and the output of first diverter switch is connected with the positive pole of described first capacitor C 1 and the first input end of the 3rd diverter switch respectively.
The output of described second diverter switch is connected with the negative pole of described first capacitor C 1, the first input end of the 4th diverter switch and the first input end of the 5th diverter switch respectively; The output of described the 3rd diverter switch is connected with the output of described the 4th diverter switch, the first input end of the 6th diverter switch and the first input end of the 7th diverter switch respectively.
The output of described the 5th diverter switch is connected with the negative pole of second capacitor C 2 and the first input end of the 8th diverter switch respectively; The output of described the 6th diverter switch connects the positive pole of second capacitor C 2; The output of the 7th diverter switch is connected the output head grounding of the 8th diverter switch with the positive pole of the 3rd capacitor C 3 respectively with output port VOUT.
And second input of second input of second input of first diverter switch, second input of second diverter switch, the 3rd diverter switch, second input of the 4th diverter switch, the 5th diverter switch, second input of the 6th diverter switch, second input of the 7th diverter switch, second input of the 8th diverter switch are connected with described controller respectively.
When boosting charge pump is in charged state, described controller is controlled first diverter switch, the 4th diverter switch, the 6th diverter switch and the 8th diverter switch closure, second diverter switch, the 3rd diverter switch, the 5th diverter switch and the 7th diverter switch are disconnected, thereby described input port VIN, first capacitor C 1, second capacitor C 2 are connected successively with grounding ports, give first capacitor C 1 and 2 chargings of second capacitor C.
When boosting charge pump is in for the first time pressure-increasning state, described controller is controlled second diverter switch, the 3rd diverter switch and the 7th diverter switch closure, first diverter switch, the 4th diverter switch the 5th diverter switch and the 6th diverter switch are disconnected, thereby make the negative pole of first capacitor C 1 connect input port VIN, the positive pole of the positive pole of first capacitor C 1 and the 3rd capacitor C 3 all is connected output port VOUT, makes second capacitor C 2 be in floating dummy status simultaneously.
When the boosting charge pump processing pressure-increasning state second time, described controller is controlled first diverter switch, the 5th diverter switch, the 6th diverter switch and the 7th diverter switch closure, make second to switch day pass the 3rd diverter switch, the 4th diverter switch and the disconnection of the 8th diverter switch simultaneously, thereby the positive pole that makes first capacitor C 1 connects the input power supply, its negative pole is connected with the negative pole of second capacitor C 2, and the positive pole of the positive pole of second capacitor C 2 and second capacitor C 2 all is connected output port VOUT.
This is that the mechanism of the boosting charge pump that provides of embodiment is that switching by speed-sensitive switch makes integrated circuit constantly keep circulation to switch in above-mentioned three kinds of states, thereby realizes 1.33 times the framework that boosts.Wherein, the charged state of described boosting charge pump, pressure-increasning state and the voltage employing kirchhoff voltage theorem acquisition of pressure-increasning state for the second time for the first time.
Please consult Fig. 2 to Fig. 4 once more, as follows by every kind of of-state voltage equation that kirchhoff voltage theorem is determined:
State one: VIN=VC1+VC2 (1)
State two: VOUT=VIN+VC1 (2)
State three: VOUT=VIN-VC1+ VC2 (3)
In above three kinds of status circuits, because the output port VOUT of boosting charge pump has also connected the 3rd capacitor C 3, after above-mentioned three kinds of cycle of states switching makes the charging of the 3rd capacitor C 3 reach balance, because the continuity of the 3rd capacitor C 3 electric charge charge and discharge, change in the process of state three at state two, the voltage of output port VOUT also keeps its continuity.
That is, the VOUT(state two)=VOUT(state three)
Equally, because the continually varying characteristic of capacitance voltage, in the high-speed switching process of above three kinds of states, VC1 and VC2 also are continually varyings.
That is, the VC1(state one)=VC1(state two)=VC1(state three)
That is, the VC2(state one)=VC2(state two)=VC2(state three)
So (2) can be brought into (3) gets:
VIN+VC1=VIN-VC1+VC2 (4)
Be VC2=2VC1 (5)
(5) are brought into (1) to get:
VC1=1/3VIN (6)
By the cycling of these three kinds of states, 1/3rd, second capacitor C 2 that first capacitor C 1 will be charged to input voltage will be charged to 2/3rds of input voltage as shown from the above formula.
(6) are brought into (2) to get
VOUT=4/3VIN (7)
So, the boosting charge pump that the embodiment of the invention provides its output voltage be elevated to input voltage 4/3rds (4/3) doubly, realized 1.33 times of low ranges of input voltage are boosted.
Based on above-mentioned boosting charge pump, the also corresponding method that provides a kind of boosting charge pump to realize and boosting of the embodiment of the invention sees also Fig. 5, and described method comprises:
S110, be connected successively with grounding ports, and make the output port of boosting charge pump floating empty, give described boosting charge pump charging by input port, first electric capacity, second electric capacity of controller control boosting charge pump;
S120, control by controller that described input port is connected with the negative pole of first electric capacity, the positive pole of first electric capacity is connected with described output port, and make second electric capacity floating empty, boost for described boosting charge pump for the first time;
S130, make by controller that described input port is connected with the positive pole of first electric capacity, the negative pole of first electric capacity is connected with the negative pole of second electric capacity, the positive pole of second electric capacity is connected with described output port, and make grounding ports floating empty, boost for boosting charge pump for the second time, then execution in step S110.
This boosting charge pump can not stop charged state, for the first time pressure-increasning state and for the second time in the pressure-increasning state circulation switch, realized 1.33 times of frameworks that boost.
The embodiment of the invention also correspondence provides a kind of portable terminal, is provided with boosting charge pump in this portable terminal, can obtain higher power-efficient to LCD of mobile phone (Liquid Crystal Display, LCD) the backlight power supply of portable terminal.Above describing in detail based on this boosting charge pump, repeating no more herein.
In sum, a kind of boosting charge pump provided by the invention and its step-up method and portable terminal, by the controller control its switch respectively and the conducting state between input port, grounding ports and the input port of first electric capacity, second electric capacity, boosting charge pump, make boosting charge pump successively in charged state, the pressure-increasning state and the switching that circulates in the pressure-increasning state second time for the first time, thereby provide a kind of 1.33 times boosting charge pump, and the electronic component of the use of this charge pump is few, and cost is low.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. boosting charge pump, it is characterized in that, comprise first electric capacity, second electric capacity, controller and a plurality of diverter switch that is controlled by the controller, described controller is used to control described diverter switch respectively and the conducting state between input port, grounding ports and the output port of first electric capacity, second electric capacity, boosting charge pump, makes boosting charge pump successively at charged state, pressure-increasning state and circulating in the pressure-increasning state for the second time for the first time; Wherein:
When boosting charge pump was in charged state, controller was controlled described input port, first electric capacity, second electric capacity and is connected successively with grounding ports, and made output port floating empty;
When boosting charge pump was in for the first time pressure-increasning state, controller controlled that described input port is connected with the negative pole of first electric capacity, the positive pole of first electric capacity is connected with described output port, and makes second electric capacity float sky;
When boosting charge pump is in for the second time pressure-increasning state, controller makes that described input port is connected with the positive pole of first electric capacity, the negative pole of first electric capacity is connected with the negative pole of second electric capacity, the positive pole of second electric capacity is connected with described output port, and makes grounding ports floating empty.
2. boosting charge pump according to claim 1 is characterized in that, also comprises the 3rd electric capacity, and an end of described the 3rd electric capacity is connected with described output port, other end ground connection.
3. boosting charge pump according to claim 1, it is characterized in that described diverter switch comprises first diverter switch, second diverter switch, the 3rd diverter switch, the 4th diverter switch, the 5th diverter switch, the 6th diverter switch, the 7th diverter switch and the 8th diverter switch; Wherein:
The first input end of the first input end of described first diverter switch and second diverter switch is connected with described input port respectively, and the output of first diverter switch is connected with the positive pole of described first electric capacity and the first input end of the 3rd diverter switch respectively;
The output of described second diverter switch is connected with the negative pole of described first electric capacity, the first input end of the 4th diverter switch and the first input end of the 5th diverter switch respectively;
The output of described the 3rd diverter switch is connected with the output of described the 4th diverter switch, the first input end of the 6th diverter switch and the first input end of the 7th diverter switch respectively;
The output of described the 5th diverter switch is connected with the negative pole of second electric capacity and the first input end of the 8th diverter switch respectively;
The output of described the 6th diverter switch connects the positive pole of second electric capacity; The output of the 7th diverter switch is connected with described output port, the output head grounding of the 8th diverter switch;
Second input of second input of second input of first diverter switch, second input of second diverter switch, the 3rd diverter switch, second input of the 4th diverter switch, the 5th diverter switch, second input of the 6th diverter switch, second input of the 7th diverter switch, second input of the 8th diverter switch are connected with described controller respectively.
4. boosting charge pump according to claim 3 is characterized in that, described diverter switch is a speed-sensitive switch.
5. the method that boosting charge pump is realized boosting is characterized in that, comprising:
A, be connected successively with grounding ports, and make the output port of boosting charge pump floating empty, give described boosting charge pump charging by input port, first electric capacity, second electric capacity of controller control boosting charge pump;
B, control by controller that described input port is connected with the negative pole of first electric capacity, the positive pole of first electric capacity is connected with described output port, and make second electric capacity floating empty, boost for described boosting charge pump for the first time;
C, make by controller that described input port is connected with the positive pole of first electric capacity, the negative pole of first electric capacity is connected with the negative pole of second electric capacity, the positive pole of second electric capacity is connected with described output port, and make grounding ports floating empty, boost for boosting charge pump for the second time, then execution in step A.
6. method according to claim 5 is characterized in that, the output end voltage of boosting charge pump is 1.33 times of its input terminal voltage.
7. method according to claim 5 is characterized in that, the charged state of described boosting charge pump, pressure-increasning state and the voltage employing kirchhoff voltage theorem acquisition of pressure-increasning state for the second time for the first time.
8. portable terminal, it is characterized in that, in described portable terminal, be provided with boosting charge pump, described boosting charge pump comprises first electric capacity, second electric capacity, controller and a plurality of diverter switch that is controlled by the controller, described controller is used to control described diverter switch respectively and the conducting state between input port, grounding ports and the input port of first electric capacity, second electric capacity, boosting charge pump, makes boosting charge pump successively at charged state, pressure-increasning state and circulating in the pressure-increasning state for the second time for the first time; Wherein:
When boosting charge pump was in charged state, controller was controlled described input port, first electric capacity, second electric capacity and is connected successively with grounding ports, and made output port floating empty;
When boosting charge pump was in for the first time pressure-increasning state, controller controlled that described input port is connected with the negative pole of first electric capacity, the positive pole of first electric capacity is connected with described output port, and makes second electric capacity float sky;
When boosting charge pump is in for the second time pressure-increasning state, controller makes that described input port is connected with the positive pole of first electric capacity, the negative pole of first electric capacity is connected with the negative pole of second electric capacity, the positive pole of second electric capacity is connected with described output port, and makes grounding ports floating empty.
9. portable terminal according to claim 8 is characterized in that, comprises that boosting charge pump also comprises the 3rd electric capacity, and an end of described the 3rd electric capacity is connected with described output port, other end ground connection.
10. portable terminal according to claim 8, it is characterized in that described diverter switch comprises first diverter switch, second diverter switch, the 3rd diverter switch, the 4th diverter switch, the 5th diverter switch, the 6th diverter switch, the 7th diverter switch and the 8th diverter switch; Wherein:
The first input end of the first input end of described first diverter switch and second diverter switch is connected with described input port respectively, and the output of first diverter switch is connected with the positive pole of described first electric capacity and the first input end of the 3rd diverter switch respectively;
The output of described second diverter switch is connected with the negative pole of described first electric capacity, the first input end of the 4th diverter switch and the first input end of the 5th diverter switch respectively;
The output of described the 3rd diverter switch is connected with the output of described the 4th diverter switch, the first input end of the 6th diverter switch and the first input end of the 7th diverter switch respectively;
The output of described the 5th diverter switch is connected with the negative pole of second electric capacity and the first input end of the 8th diverter switch respectively;
The output of described the 6th diverter switch connects the positive pole of second electric capacity; The output of the 7th diverter switch is connected with described output port, the output head grounding of the 8th diverter switch;
Second input of second input of second input of first diverter switch, second input of second diverter switch, the 3rd diverter switch, second input of the 4th diverter switch, the 5th diverter switch, second input of the 6th diverter switch, second input of the 7th diverter switch, second input of the 8th diverter switch are connected with described controller respectively.
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| CN103840656A (en) * | 2012-11-22 | 2014-06-04 | 联咏科技股份有限公司 | Charge pumping module and voltage generation method thereof |
| TWI456880B (en) * | 2012-11-19 | 2014-10-11 | Ind Tech Res Inst | Switch circuit |
| WO2018032990A1 (en) * | 2016-08-15 | 2018-02-22 | 珠海市魅族科技有限公司 | Charging circuit, system and method, and electronic device |
| CN110022059A (en) * | 2017-12-20 | 2019-07-16 | 美光科技公司 | Electronic device and its operating method |
| WO2020155288A1 (en) * | 2019-01-28 | 2020-08-06 | 展讯通信（上海）有限公司 | Buck-boost circuit and control method |
| US11088617B2 (en) | 2017-12-20 | 2021-08-10 | Micron Technology, Inc. | Electronic device with an output voltage booster mechanism |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI456880B (en) * | 2012-11-19 | 2014-10-11 | Ind Tech Res Inst | Switch circuit |
| US9348351B2 (en) | 2012-11-19 | 2016-05-24 | Industrial Technology Research Institute | Switch circuit |
| CN103840656A (en) * | 2012-11-22 | 2014-06-04 | 联咏科技股份有限公司 | Charge pumping module and voltage generation method thereof |
| WO2018032990A1 (en) * | 2016-08-15 | 2018-02-22 | 珠海市魅族科技有限公司 | Charging circuit, system and method, and electronic device |
| US10978898B2 (en) | 2016-08-15 | 2021-04-13 | Meizu Technology Co., Ltd. | Charging circuit, system and method, and electronic device |
| CN110022059A (en) * | 2017-12-20 | 2019-07-16 | 美光科技公司 | Electronic device and its operating method |
| US11088617B2 (en) | 2017-12-20 | 2021-08-10 | Micron Technology, Inc. | Electronic device with an output voltage booster mechanism |
| WO2020155288A1 (en) * | 2019-01-28 | 2020-08-06 | 展讯通信（上海）有限公司 | Buck-boost circuit and control method |
| US11799376B2 (en) | 2019-01-28 | 2023-10-24 | Spreadtrum Communications (Shanghai) Co., Ltd. | Buck-boost circuit and control method |
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Application publication date: 20110601 |