CN103488226A - Output voltage control circuit - Google Patents
Output voltage control circuit Download PDFInfo
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- CN103488226A CN103488226A CN201310407484.7A CN201310407484A CN103488226A CN 103488226 A CN103488226 A CN 103488226A CN 201310407484 A CN201310407484 A CN 201310407484A CN 103488226 A CN103488226 A CN 103488226A
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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 the circuit engineering field, relate in particular to a kind of output voltage controlling circuit.
Background technology
At present, along with the renewal day by day of product, efficient power management has become one of key factor of circuit design.
Due to system, under the different operating state, to the demand of voltage, be different.For example, when needs are processed mass data, the voltage that the use amplitude is higher, when calculated amount is little, or, in holding state lower time, can be used the voltage that amplitude is lower.
If power supply provides high voltage always, may cause the waste of electric weight.If low voltage is provided always, can affect the system operation, can't carry out extensive calculation process.
Therefore, on the design field of power-efficient, one of them is exactly to provide different output voltages for the different operating situation of system now, to realize in the normal operation of assurance system, for system is saved 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 in the normal operation of assurance system, for system is saved electric quantity of power supply.
A kind of output voltage controlling circuit comprises: voltage input end mouth (11), Voltage-output port (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 ends are connected with described voltage input end mouth (11), and the other end of described mu balanced circuit (14) is connected with described Voltage-output port (12);
Described feedback circuit (15) one ends are connected with described Voltage-output port (12), and described feedback circuit (15) other end is connected with described mu balanced circuit (14);
Described logic control circuit (16) one ends are 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 port (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); The second port of described voltage stabilizing chip (141) is connected with described Voltage-output port (12) by described inductance (142);
Described the first resistance (151), the second resistance (152), the 3rd resistance (153) are connected between described Voltage-output port (12) and ground, and the 3rd port of described voltage stabilizing chip (141) is connected between described the first resistance (151) and the second resistance (152);
The collector of described triode (161) is connected between described the 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 simultaneously, 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 the input logic signal control circuit, and then control the size of the voltage of described mu balanced circuit output, take under different situations as system different output voltages is provided.Realization is in the normal operation of assurance system, for system is saved electric quantity of power supply.And circuit structure is simple, realize easily can controlling comparatively exactly the conversion of output voltage.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the instructions write, claims and accompanying drawing.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms the part of instructions, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
The structural representation that Fig. 1 is output voltage controlling circuit in the embodiment of the present invention;
Another structural representation that Fig. 2 is 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, only for description and interpretation the present invention, is not intended to limit the present invention.
Due to system, under the different operating state, to the demand of voltage, be different.The invention provides and a kind ofly can realize simply, quickly and accurately the conversion to electric power output voltage.
As shown in Figure 1, the output voltage controlling circuit of the embodiment of the present invention comprises: voltage input end mouth 11, Voltage-output port 12, logic input terminal mouth 13, mu balanced circuit 14, feedback circuit 15, logic control circuit 16.
Wherein, mu balanced circuit 14 1 ends are connected with voltage input end mouth 11, and the other end of mu balanced circuit 14 is connected with Voltage-output port 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, the 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; The second port OUT of voltage stabilizing chip 141 is connected with Voltage-output port 12 by inductance 142.
The first resistance 151, the second resistance 152, the 3rd resistance 153 are connected between Voltage-output port 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 simultaneously, 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 the different operating state, system is different to the demand of voltage.System can be operated in two kinds of voltage modes, and 3.3V and 5V, when needs are processed mass data, are used 5V voltage, when calculated amount is little, or, in holding state lower time, uses 3.3V voltage.
It is 0 or 1 that logic control signal is set, by controlling the closure or openness as the triode 161 of switch, make the 3rd resistance 153 places in circuit in feedback circuit 15 or, by short circuit, change the feedback current that offers 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 signals 0 or 1, the output voltage as a result that Voltage-output port 14 is controlled according to logic control signal.
As shown in table 1 below, when logic control signal is 0, be equivalent to when triode 161 base stages provide a low level, triode 161 is opened, and makes the 3rd resistance 153 be linked in circuit.At this moment, due to the first resistance 151, the second resistance 152 and the 3rd resistance 153 series connection, the feedback circuit resistance increases, electric current on this series circuit reduces, thereby the feedback current that the 3rd port FB of voltage stabilizing chip 141 obtains also reduces, the voltage of the second port OUT output of voltage stabilizing chip 141 increases, and makes the voltage at Voltage-output port 12 output 5V.
When logic control signal is 1, be equivalent to when triode 161 base stages provide a high level, triode 161 closures, make the 3rd resistance 153 by short circuit.At this moment, due to the first resistance 151 and the second resistance 152 series connection, the feedback circuit resistance reduces, electric current on this series circuit increases, thereby the feedback current that the 3rd port FB of voltage stabilizing chip 141 obtains also increases, the voltage of the second port OUT output of voltage stabilizing chip 141 reduces, and makes the voltage at Voltage-output port 12 output 3.3V.
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 the input logic signal control circuit, and then control the size of the voltage of mu balanced circuit output, take under different situations as system different output voltages is provided.Realization is in the normal operation of assurance system, for system is saved electric quantity of power supply.And circuit structure is simple, realize easily can controlling comparatively exactly the conversion of output voltage.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (2)
1. an output voltage controlling circuit, is characterized in that, comprising: voltage input end mouth (11), Voltage-output port (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 ends are connected with described voltage input end mouth (11), and the other end of described mu balanced circuit (14) is connected with described Voltage-output port (12);
Described feedback circuit (15) one ends are connected with described Voltage-output port (12), and described feedback circuit (15) other end is connected with described mu balanced circuit (14);
Described logic control circuit (16) one ends are 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 port (12).
2. circuit according to claim 1, is characterized in that, 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); The second port of described voltage stabilizing chip (141) is connected with described Voltage-output port (12) by described inductance (142);
Described the first resistance (151), the second resistance (152), the 3rd resistance (153) are connected between described Voltage-output port (12) and ground, and the 3rd port of described voltage stabilizing chip (141) is connected between described the first resistance (151) and the second resistance (152);
The collector of described triode (161) is connected between described the 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 simultaneously, 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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407484.7A CN103488226B (en) | 2013-09-09 | 2013-09-09 | Output voltage control circuit |
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| CN103488226A true CN103488226A (en) | 2014-01-01 |
| CN103488226B CN103488226B (en) | 2015-06-10 |
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| CN201310407484.7A Expired - Fee Related CN103488226B (en) | 2013-09-09 | 2013-09-09 | Output voltage control circuit |
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Cited By (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 |
| CN115437444A (en) * | 2022-10-12 | 2022-12-06 | 群联电子股份有限公司 | Voltage stabilizing circuit module, memory storage device and voltage control method |
| CN116978904A (en) * | 2023-07-27 | 2023-10-31 | 屹晶微电子(台州)有限公司 | Power supply voltage stabilizing circuit and integrated chip |
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| CN116978904A (en) * | 2023-07-27 | 2023-10-31 | 屹晶微电子(台州)有限公司 | Power supply voltage stabilizing circuit and integrated chip |
| 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 |
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| CN103488226B (en) | 2015-06-10 |
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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 |