CN103488226B - Output voltage control circuit - Google Patents
Output voltage control circuit Download PDFInfo
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- CN103488226B CN103488226B CN201310407484.7A CN201310407484A CN103488226B CN 103488226 B CN103488226 B CN 103488226B CN 201310407484 A CN201310407484 A CN 201310407484A CN 103488226 B CN103488226 B CN 103488226B
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Abstract
The invention discloses an output voltage control circuit. The output voltage control circuit has the advantages that currents which are about to be fed back to a voltage stabilizing chip are inputted into a logic signal control circuit, so that voltages outputted by a voltage stabilizing circuit can be controlled, and different output voltages can be provided for a system under different conditions; power of a power supply can be saved for the system while normal running of the system is guaranteed; the output voltage control circuit is simple in structure and easy to implement, and conversion of the output voltages can be accurately controlled.
Description
Technical field
The present invention relates to circuit engineering field, particularly relate to a kind of output voltage controlling circuit.
Background technology
At present, along with the renewal day by day of product, efficient power management is one of key factor becoming circuit design.
Because system is under different operating state, be different to the demand of voltage.Such as, when needs process mass data time, use the voltage that amplitude is higher, when calculated amount is little, or when being under holding state, the voltage that amplitude is lower can be used.
If power supply provides high voltage always, then may cause the waste of electricity.If provide low voltage always, then can run by influential system, cannot extensive calculation process be carried out.
Therefore, now on the design field of power-efficient, one of them is exactly must provide different output voltages for the different operating situation of system, to realize while guarantee system is normally run, for system saves electric quantity of power supply.
Summary of the invention
The embodiment of the present invention provides a kind of output voltage controlling circuit, for realizing while guarantee system is normally run, for system saves electric quantity of power supply.
A kind of output voltage controlling circuit, comprising: voltage input end mouth (11), voltage output end mouth (12), logic input terminal mouth (13), mu balanced circuit (14), feedback circuit (15) and logic control circuit (16);
Wherein, described mu balanced circuit (14) one end is connected with described voltage input end mouth (11), and the other end of described mu balanced circuit (14) is connected with described voltage output end mouth (12);
Described feedback circuit (15) one end is connected with described voltage output end mouth (12), and described feedback circuit (15) other end is connected with described mu balanced circuit (14);
Described logic control circuit (16) one end is connected with described logic input terminal mouth (13), and the other end of described logic control circuit (16) is connected with feedback circuit (15);
Described logic control circuit (16), according to the logic control signal received from described logic input terminal mouth (13), control the size that described feedback circuit (15) feeds back to the feedback current of described mu balanced circuit (14); Described mu balanced circuit (14) varies in size according to the feedback current received, exports the voltage of corresponding size to described voltage output end mouth (12).
Preferably, described mu balanced circuit (14) comprises voltage stabilizing chip (141) and inductance (142); Described feedback circuit (15) comprises the first resistance (151), the second resistance (152) and the 3rd resistance (153); Described logic control circuit comprises triode (161) and the 4th resistance (162);
Wherein, the first port of described voltage stabilizing chip (141) is connected with described voltage input end mouth (11); Second port of described voltage stabilizing chip (141) is connected with described voltage output end mouth (12) by described inductance (142);
Described first resistance (151), the second resistance (152), the 3rd resistance (153) are connected between described voltage output end mouth (12) and ground, and the 3rd port of described voltage stabilizing chip (141) is connected between described first resistance (151) and the second resistance (152);
The collector of described triode (161) is connected between described second resistance (152) and the 3rd resistance (153); The grounded emitter of described triode (161); The base stage of described triode (161) is by the 4th resistance (162) ground connection, and meanwhile, the base stage of described triode (161) is connected with described logic input terminal mouth (13).
The output voltage controlling circuit of the present embodiment, by feeding back to the size of the electric current of voltage stabilizing chip in input logic signal control circuit, and then controls the size of voltage that described mu balanced circuit exports, with in varied situations for system provides different output voltages.Realize while guarantee system is normally run, for system saves electric quantity of power supply.And circuit structure is simple, realize easily, more adequately to control the conversion of output voltage.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write instructions, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of output voltage controlling circuit in the embodiment of the present invention;
Fig. 2 is another structural representation of output voltage controlling circuit in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Because system is under different operating state, be different to the demand of voltage.The invention provides a kind of conversion that can realize simply, quickly and accurately electric power output voltage.
As shown in Figure 1, the output voltage controlling circuit of the embodiment of the present invention, comprising: voltage input end mouth 11, voltage output end mouth 12, logic input terminal mouth 13, mu balanced circuit 14, feedback circuit 15, logic control circuit 16.
Wherein, mu balanced circuit 14 one end is connected with voltage input end mouth 11, and the other end of mu balanced circuit 14 is connected with voltage output end mouth 12.
Feedback circuit 15 one end is connected with voltage output end mouth 12, and feedback circuit 15 other end is connected with mu balanced circuit 14.
Logic control circuit 16 one end is connected with logic input terminal mouth 13, and the other end of logic control circuit 16 is connected with feedback circuit 15.
Logic control circuit 16, according to the logic control signal received from logic input terminal mouth 13, feedback control circuit 15 feeds back to the size of the feedback current of mu balanced circuit 14; Mu balanced circuit 14 varies in size according to the feedback current received, exports the voltage of corresponding size to voltage output end mouth 12.
Preferably, as shown in Figure 2, mu balanced circuit 14 comprises voltage stabilizing chip 141 and inductance 142; Feedback circuit 15 comprises the first resistance 151, second resistance 152 and the 3rd resistance 153; Logic control circuit comprises triode 161 and the 4th resistance 162.
Wherein, the first port IN of voltage stabilizing chip 141 is connected with voltage input end mouth 11; Second port OUT of voltage stabilizing chip 141 is connected with voltage output end mouth 12 by inductance 142.
First resistance 151, second resistance 152, the 3rd resistance 153 are connected between voltage output end mouth 12 and ground, and the 3rd port FB of voltage stabilizing chip 141 is connected between the first resistance 151 and the second resistance 152.
The collector of triode 161 is connected between the second resistance 152 and the 3rd resistance 153; The grounded emitter of triode 161; The base stage of triode 161 is by the 4th resistance 162 ground connection, and meanwhile, the base stage of triode 161 is connected with logic input terminal mouth 13.
Below the specific works principle of the output voltage controlling circuit of the embodiment of the present invention is described.
Under different operating state, the demand of system to voltage is different.System can be operated in two kinds of voltage modes, 3.3V and 5V, when needs process mass data time, uses 5V voltage, when calculated amount is little, or when being under holding state, uses 3.3V voltage.
Arranging logic control signal is 0 or 1, by controlling the closure or openness as the triode 161 of switch, make the 3rd resistance 153 place in circuit in feedback circuit 15 or by short circuit, change the feedback current being supplied to voltage stabilizing chip 141, to change the output voltage of mu balanced circuit 14.
In the present embodiment, the output voltage that can control mu balanced circuit 14 is 5V or 3.3V.Logic input terminal mouth 13 receive logic control signal 0 or 1, the result output voltage that voltage output end mouth 14 controls according to logic control signal.
As shown in table 1 below, when logic control signal is 0, be equivalent to when triode 161 base stage provides a low level, triode 161 is opened, and the 3rd resistance 153 is linked in circuit.At this moment, because the first resistance 151, second resistance 152 and the 3rd resistance 153 are connected, feedback circuit resistance increases, electric current on this series circuit reduces, thus the feedback current that the 3rd port FB of voltage stabilizing chip 141 obtains also reduces, the voltage that second port OUT of voltage stabilizing chip 141 exports increases, and makes the voltage exporting 5V at voltage output end mouth 12.
When logic control signal is 1, be equivalent to when triode 161 base stage provides a high level, triode 161 closes, and makes the 3rd resistance 153 by short circuit.At this moment, because the first resistance 151 and the second resistance 152 are connected, feedback circuit resistance reduces, electric current on this series circuit increases, thus the feedback current that the 3rd port FB of voltage stabilizing chip 141 obtains also increases, the voltage that second port OUT of voltage stabilizing chip 141 exports reduces, and makes the voltage exporting 3.3V at voltage output end mouth 12.
Table 1
| Logic control signal | Output voltage |
| 0 | 5V |
| 1 | 3.3V |
The output voltage controlling circuit of the embodiment of the present invention, by feeding back to the size of the electric current of voltage stabilizing chip in input logic signal control circuit, and then controls the size of voltage that mu balanced circuit exports, with in varied situations for system provides different output voltages.Realize while guarantee system is normally run, for system saves electric quantity of power supply.And circuit structure is simple, realize easily, more adequately to control the conversion of output voltage.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (1)
1. an output voltage controlling circuit, it is characterized in that, comprising: voltage input end mouth (11), voltage output end mouth (12), logic input terminal mouth (13), mu balanced circuit (14), feedback circuit (15) and logic control circuit (16);
Wherein, described mu balanced circuit (14) one end is connected with described voltage input end mouth (11), and the other end of described mu balanced circuit (14) is connected with described voltage output end mouth (12);
Described feedback circuit (15) one end is connected with described voltage output end mouth (12), and described feedback circuit (15) other end is connected with described mu balanced circuit (14);
Described logic control circuit (16) one end is connected with described logic input terminal mouth (13), and the other end of described logic control circuit (16) is connected with feedback circuit (15);
Described logic control circuit (16), according to the logic control signal received from described logic input terminal mouth (13), control the size that described feedback circuit (15) feeds back to the feedback current of described mu balanced circuit (14); Described mu balanced circuit (14) varies in size according to the feedback current received, exports the voltage of corresponding size to described voltage output end mouth (12);
Described mu balanced circuit (14) comprises voltage stabilizing chip (141) and inductance (142); Described feedback circuit (15) comprises the first resistance (151), the second resistance (152) and the 3rd resistance (153); Described logic control circuit (16) comprises triode (161) and the 4th resistance (162);
Wherein, the first port of described voltage stabilizing chip (141) is connected with described voltage input end mouth (11); Second port of described voltage stabilizing chip (141) is connected with described voltage output end mouth (12) by described inductance (142);
Described first resistance (151), the second resistance (152), the 3rd resistance (153) are connected between described voltage output end mouth (12) and ground, and the 3rd port of described voltage stabilizing chip (141) is connected between described first resistance (151) and the second resistance (152);
The collector of described triode (161) is connected between described second resistance (152) and the 3rd resistance (153); The grounded emitter of described triode (161); The base stage of described triode (161) is by the 4th resistance (162) ground connection, and meanwhile, the base stage of described triode (161) is connected with described logic input terminal mouth (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407484.7A CN103488226B (en) | 2013-09-09 | 2013-09-09 | Output voltage control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407484.7A CN103488226B (en) | 2013-09-09 | 2013-09-09 | Output voltage control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103488226A CN103488226A (en) | 2014-01-01 |
| CN103488226B true CN103488226B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310407484.7A Expired - Fee Related CN103488226B (en) | 2013-09-09 | 2013-09-09 | Output voltage control circuit |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363558A (en) * | 2020-11-12 | 2021-02-12 | 安徽熙泰智能科技有限公司 | Voltage regulating circuit |
| CN115437444B (en) * | 2022-10-12 | 2024-03-12 | 群联电子股份有限公司 | Voltage stabilizing circuit module, memory storage device and voltage control method |
| CN116978904B (en) * | 2023-07-27 | 2024-02-23 | 屹晶微电子(台州)有限公司 | Power supply voltage stabilizing circuit and integrated chip |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051717Y (en) * | 2007-07-09 | 2008-04-23 | 俞跃华 | No contact binary transformer voltage-adjusting power supply |
| TWI339323B (en) * | 2007-10-01 | 2011-03-21 | Inventec Corp | Feedback and comparison apparatus and dc-dc voltage converter |
| CN101414195B (en) * | 2008-12-05 | 2011-01-12 | 张培侠 | High voltage stabilizing feedback type electricity-saving device |
| CN101552560B (en) * | 2009-01-13 | 2011-06-22 | 成都芯源系统有限公司 | Switch voltage stabilizing circuit and control method thereof |
| CN101599696B (en) * | 2009-07-27 | 2012-09-12 | 福建星网锐捷网络有限公司 | Non-isolation DC/DC control circuit and converter |
| CN101710786B (en) * | 2009-11-11 | 2012-04-25 | 成都芯源系统有限公司 | Switch voltage stabilizing circuit and method |
| CN201608633U (en) * | 2009-12-25 | 2010-10-13 | 天津诺尔哈顿电器制造有限公司 | Voltage stabilization output feedback and isolation circuit |
| CN201830166U (en) * | 2010-09-10 | 2011-05-11 | 赵龙升 | Current-stabilizing and voltage-stabilizing power supply |
| CN102469666B (en) * | 2010-11-17 | 2014-01-29 | 晨星软件研发(深圳)有限公司 | Feedback voltage stabilizing circuit |
| CN201917840U (en) * | 2011-01-20 | 2011-08-03 | 深圳市斯尔顿科技有限公司 | Voltage regulator |
| CN102647073B (en) * | 2012-05-15 | 2014-11-26 | 成都芯源系统有限公司 | Switch voltage stabilizing circuit and control circuit and method thereof |
| CN102957886A (en) * | 2012-11-13 | 2013-03-06 | 广东长虹电子有限公司 | System and method for controlling television set backlight |
| CN103218003B (en) * | 2013-04-26 | 2015-06-10 | 无锡中星微电子有限公司 | Low-dropout voltage stabilizer with multiple power sources input |
| CN203444384U (en) * | 2013-09-09 | 2014-02-19 | 天脉聚源(北京)传媒科技有限公司 | Output voltage control circuit |
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Denomination of invention: A kind of output voltage controlling circuit Effective date of registration: 20170401 Granted publication date: 20150610 Pledgee: Silicon Valley Bank Co.,Ltd. Pledgor: TVMINING (BEIJING) MEDIA TECHNOLOGY Co.,Ltd. Registration number: 2017310000019 |
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Granted publication date: 20150610 Termination date: 20210909 |