CN104049549A - Electricity-saving control circuit and electronic equipment - Google Patents
Electricity-saving control circuit and electronic equipment Download PDFInfo
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- CN104049549A CN104049549A CN201410268178.4A CN201410268178A CN104049549A CN 104049549 A CN104049549 A CN 104049549A CN 201410268178 A CN201410268178 A CN 201410268178A CN 104049549 A CN104049549 A CN 104049549A
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Abstract
The invention provides an electricity-saving control circuit and electronic equipment. The electricity-saving control circuit comprises an LDO, a power-on impact capacitor and an MCU, the LDO comprises a power source input pin, a switch pin and a power source output pin, one end of the power-on impact capacitor is connected with the power source input pin, the other end of the power-on impact capacitor is connected with the switch pin, the MCU comprises an MCU power source pin and an MCU control pin, the MCU power source pin is connected with the power source output pin, and the MCU control pin is connected with the switch pin. The MCU is used for being triggered by a preset trigger condition to output low levels to the MCU control pin under a normal mode to enter in an electricity saving mode, and according to the normal mode, the MCU outputs high levels to the MCU control pin. According to the electricity-saving control circuit and the electronic equipment, power consumption can be reduced to the maximum extent when an MCU system with the LDO is in a low power consumption mode, and the electricity consumption is zero when the MCU is idle or does not need to work. The enabling control function of the switch pin of the LDO is utilized, the power supply of the MCU can be powered off automatically, and the power supply can be restarted under proper excitation.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of Saving Power Control Circuit and electronic equipment.
Background technology
In MCU (Micro Control Unit, micro-control unit) chip design process, there is the setting of low-power consumption mode at present, to allow chip more power saving in idle.But current any low-power consumption mode, has all just closed the no control module of part, and chip still has power consumption.
And in MCU system, design LDO (Low Drop-Out Regulator, low pressure difference linear voltage regulator) to stablize suitable voltage for the work of MCU chip provides, but, in traditional use-pattern, the output terminal of LDO (Vout) only can provide stable output voltage, can not break voluntarily oneself output voltage more can not restart output under suitable excitation.
Therefore, how guaranteeing to reduce to greatest extent power consumption with the MCU system of LDO when the low-power consumption mode, is problem demanding prompt solution.
Summary of the invention
The present invention is intended to one of address the above problem.
Fundamental purpose of the present invention is to provide a kind of Saving Power Control Circuit;
Another object of the present invention is to provide a kind of electronic equipment.
For achieving the above object, technical scheme of the present invention is specifically achieved in that
One aspect of the present invention provides a kind of Saving Power Control Circuit, comprising: LDO, and described LDO comprises: power supply input pin, switch pin and power supply output pin; Upper surge electric capacity, one end of described upper surge electric capacity connects described power supply input pin, and the other end connects described switch pin; MCU, described MCU comprises: MCU power pins, MCU control pin; Described MCU power pins connects described power supply output pin, and described MCU controls pin and connects described switch pin; Described MCU, for when the normal mode, preset trigger condition triggering and to described MCU, controls pin output low level and enter energy-saving mode; Wherein, described normal mode is that described MCU controls the pattern of pin output high level to described MCU.
In addition, described LDO, for when the described power supply electrifying, starts working; Described MCU, also for after starting working at described LDO, controls pin output high level to described MCU and enters described normal mode.
In addition, described MCU control pin connects described switch pin by current-limiting circuit.
In addition, described MCU controls pin by preventing jittering circuit ground connection.
In addition, described MCU control pin connects described switch pin by current-limiting circuit and/or preventing jittering circuit.
In addition, described power supply input pin is by holding circuit ground connection.
In addition, described power supply input pin is by the first capacity earth, and described power supply output pin is by the second capacity earth.
In addition, described default trigger condition is: the executable operations time does not surpass Preset Time to described MCU.
In addition, described MCU also comprises: trigger pin, described default trigger condition is: described triggering pin is triggered; Or described MCU also comprises: communication pin, described default trigger condition is: described communication pin receives and enters energy-saving mode instruction.
The present invention provides a kind of electronic equipment on the other hand, comprises above-mentioned Saving Power Control Circuit.
As seen from the above technical solution provided by the invention, by the present invention, can guarantee to reduce to greatest extent power consumption with the MCU system of LDO when the low-power consumption mode, making MCU is zero in power consumption idle or while not needing work.The present invention utilize LDO switch pin enable to control function, can automatically cut off the power supply of MCU, and restart power supply under suitable excitation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the principle schematic of Saving Power Control Circuit provided by the invention;
The schematic diagram of the Saving Power Control Circuit that Fig. 2 provides for the embodiment of the present invention 1;
The schematic diagram of the Saving Power Control Circuit that Fig. 3 provides for the embodiment of the present invention 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or quantity or position.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.
Fig. 1 has shown the principle schematic of Saving Power Control Circuit of the present invention, and referring to Fig. 1, Saving Power Control Circuit of the present invention, comprising: LDO, upper surge electric capacity, MCU; Wherein:
LDO comprises: power supply input pin, switch pin and power supply output pin; Concrete, power supply input pin can be connected to power supply, and the power supply that this power supply can provide for battery can be positioned at the outside of electronic equipment, also can be positioned at the inside of electronic equipment; The power supply that this power supply also can provide for the energization pins of USB interface or other interfaces.By power supply, it can be whole circuit supply.In addition, the supply voltage of this power supply can be 1.8V to 5.5V, can select suitable supply voltage according to the different demands of distinct electronic apparatuses; Voltage by the power supply output pin output after LDO also can be exported suitable voltage according to the different demands of distinct electronic apparatuses.
One end of upper surge electric capacity connects power supply input pin, other end connecting valve pin; Concrete, when power supply input pin moment that switches on power obtains Power supply voltage, on this, surge electric capacity, to an of short duration high level of switch pin output of LDO, starts working LDO, power supply output pin output voltage.
MCU comprises: MCU power pins, MCU control pin; MCU power pins connects power supply output pin, and MCU controls pin connecting valve pin; MCU, for when the normal mode, preset trigger condition triggering and to MCU, controls pin output low level and enter energy-saving mode; Wherein, normal mode is that MCU controls the pattern of pin output high level to MCU.Concrete, at upper surge electric capacity, open after LDO work, the power supply output pin output MCU required voltage of LDO, now MCU starts working, and controls pin output high level to MCU, to make the switch pin of LDO obtain this high level, LDO continuous firing, be LDO, when power supply electrifying, start working; MCU, after LDO starts working, controls pin output high level to MCU and enters described normal mode.When electronic equipment need to enter energy-saving mode, the trigger condition of being preset MCU triggers to be controlled pin output low level to MCU and enters energy-saving mode, now, MCU controls pin to the switch pin output low level of LDO, LDO quits work, and disconnects the power supply to MCU, and MCU quits work thus, thereby realize the power-off of electronic equipment, save to greatest extent electric energy.Certainly, if need electronic equipment to re-power, only need to again power to power supply input pin, for example: open the switch of battery, reinsert the operations such as USB interface.
Thus, by Saving Power Control Circuit of the present invention, can guarantee to reduce to greatest extent power consumption with the MCU system of LDO when the low-power consumption mode, making MCU is zero in power consumption idle or while not needing work.The present invention utilize LDO switch pin enable to control function, can automatically cut off the power supply of MCU, and restart power supply under suitable excitation.
In addition, MCU is preset under trigger condition to be triggered when controlling pin output low level and enter energy-saving mode to MCU, this default trigger condition can for but be not limited to following mode:
The executable operations time does not surpass Preset Time to mode one: this default trigger condition can be: MCU; Concrete, MCU surpasses certain hour without any operation in the situation that, and MCU thinks and can enter energy-saving mode, and now, MCU surpasses Preset Time and forms default trigger condition without any operation in the situation that.Based on this kind of mode, MCU can enter energy-saving mode automatically, guarantees the zero power consumption of MCU, to save electric energy.
Mode two: MCU also comprises: trigger pin; Default trigger condition is: trigger pin and be triggered; Concrete, MCU can also comprise one and trigger pin, and this triggering pin can receive trigger pip, now, forms default trigger condition.For example: when button is pressed, produce trigger pip, the triggering pin of MCU receives the trigger pip that button produces, trigger pin and be triggered.Based on this kind of mode, MCU can accept at one's leisure manual control and enter energy-saving mode, when not using, can cut off the electricity supply, and can control in real time the power consumption of MCU, saves electric energy.
Mode three: MCU also comprises: communication pin; Default trigger condition is: communication pin receives and enters energy-saving mode instruction.Concrete, MCU can also comprise a communication pin, and this communication pin can receive all kinds of instructions, comprises and enters energy-saving mode instruction etc., now, forms default trigger condition.For example: the communication pin connecting by USB interface, what receive that USB interface transmission comes enters energy-saving mode instruction.Based on this kind of mode, MCU can accept at one's leisure manual control and enter energy-saving mode, when not using, can cut off the electricity supply, and can control in real time the power consumption of MCU, saves electric energy.
In addition; in order further to improve the stability of Saving Power Control Circuit of the present invention; in Saving Power Control Circuit of the present invention, can also comprise a kind of or combination in any in current-limiting circuit, preventing jittering circuit, holding circuit; below only the annexation of each circuit is briefly described, but the present invention is not limited thereto:
MCU controls pin by current-limiting circuit connecting valve pin;
MCU controls pin by preventing jittering circuit ground connection;
MCU controls pin by current-limiting circuit and/or preventing jittering circuit connecting valve pin;
Power supply input pin is by holding circuit ground connection.
Above current-limiting circuit can comprise the elements such as resistance; preventing jittering circuit can comprise the elements such as electric capacity; holding circuit can comprise the elements such as resistance and/or electric capacity, but the present invention is not limited to said elements, as long as can realize the function of above-mentioned each circuit.
Meanwhile, in order to guarantee that LDO normally works, the power supply input pin of LDO is by the first capacity earth, and power supply output pin is by the second capacity earth.
Below, provide two kinds of specific implementations of Saving Power Control Circuit of the present invention, but the present invention is not limited to following two kinds of implementations.
Embodiment 1
Fig. 2 has shown the schematic diagram of the Saving Power Control Circuit that the embodiment of the present invention 1 provides, and referring to Fig. 2, the Saving Power Control Circuit of the embodiment of the present invention 1 comprises:
Power supply connects the power supply input pin Vin of LDO, power supply is by the 3rd capacitor C 3 and the second resistance (holding circuit) R2 ground connection in parallel, power supply connects the switch pin Ven of LDO by the first electric capacity (upper surge electric capacity) C1, the switch pin Ven of LDO is connected one end of the 3rd resistance (current-limiting circuit) R3 by the second electric capacity (preventing jittering circuit) C2 in parallel with the first resistance (holding circuit) R1, the other end of the 3rd resistance (current-limiting circuit) R3 connects the control pin MCU-POWEREN of MCU, the power supply output pin Vout of LDO is by the 4th capacitor C 4 ground connection, the power supply output pin Vout of LDO connects the power pins MCU-POWER of MCU.
Embodiment 2
Fig. 3 has shown the schematic diagram of the Saving Power Control Circuit that the embodiment of the present invention 2 provides, and referring to Fig. 3, the Saving Power Control Circuit of the embodiment of the present invention 2 comprises:
Power supply connects the power supply input pin Vin of LDO, power supply is by the 7th capacitor C 7 and the 6th resistance (holding circuit) R6 ground connection in parallel, power supply connects the switch pin Ven of LDO by the 5th electric capacity (upper surge electric capacity) C5, the switch pin Ven of LDO connects the control pin MCU-POWEREN of MCU by the 5th resistance (current-limiting circuit) R5, the control pin MCU-POWEREN of MCU is by the 7th resistance (holding circuit) R7 and the 6th electric capacity (preventing jittering circuit) the C6 ground connection of series connection, the power supply output pin Vout of LDO is by the 8th capacitor C 8 ground connection, the power supply output pin Vout of LDO connects the power pins MCU-POWER of MCU.
Below provide the simple declaration of the principle of work of above-described embodiment 1 and embodiment 2:
Present principles be take 5V and is turned 3.3V LDO feed circuit and describe as example: after power end access 5V voltage, upper surge electric capacity is to an of short duration high level of switch pin Ven end of LDO, make Vout end output 3.3V, MCU has now had power supply, after unlatching work, to MCU, control high level of pin MCU-POWEREN, make switch pin Ven end have a stable high level, when LDO has stable enabling, after high level, stablize output 3.3V, MCU steady operation.When MCU enters trigger condition, to close after LDO, to MCU, control low level of pin MCU-POWEREN, thereby give MCU power-off.If allow MCU restart work, need power end to re-enter voltage.
Thus, the power consumption when making MCU in the free time or not needing work is zero, realizes low-power consumption to greatest extent.
In addition, MCU of the present invention can arrange multiple energy-saving mode according to different economize on electricity demands, and such as battery saving modes such as closed portion functions, and the pointed energy-saving mode of the present invention is the minimum pattern of power consumption.
In the present invention, " connection " refers to direct connection or indirectly connects, and directly connection can be for direct-connected between element, and connection can be by not affecting other devices of circuit function, indirectly to connect between element indirectly.
The present invention also provides a kind of electronic equipment, and this electronic equipment comprises Saving Power Control Circuit of the present invention, to reduce the power consumption of electronic equipment, saves some energy.This electronic equipment can be the electronic cipher equipment such as USB key, audio frequency KEY, bluetooth KEY, OTP, and it can possess one or more functions such as electronic signature, data encrypting and deciphering, certificate verification, dynamic password generation.
In process flow diagram or any process of otherwise describing at this or method describe and can be understood to, represent to comprise that one or more is for realizing module, fragment or the part of code of executable instruction of the step of specific logical function or process, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be understood by embodiments of the invention person of ordinary skill in the field.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, a plurality of steps or method can realize with being stored in storer and by software or the firmware of suitable instruction execution system execution.For example, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: have for data-signal being realized to the discrete logic of the logic gates of logic function, the special IC with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, this program, when carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.If described integrated module usings that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention in the situation that not departing from principle of the present invention and aim, modification, replacement and modification.Scope of the present invention is by claims and be equal to and limit.
Claims (10)
1. a Saving Power Control Circuit, is characterized in that, comprising:
LDO, described LDO comprises: power supply input pin, switch pin and power supply output pin;
Upper surge electric capacity, one end of described upper surge electric capacity connects described power supply input pin, and the other end connects described switch pin;
MCU, described MCU comprises: MCU power pins, MCU control pin; Described MCU power pins connects described power supply output pin, and described MCU controls pin and connects described switch pin;
Described MCU, for when the normal mode, preset trigger condition triggering and to described MCU, controls pin output low level and enter energy-saving mode; Wherein, described normal mode is that described MCU controls the pattern of pin output high level to described MCU.
2. Saving Power Control Circuit according to claim 1, is characterized in that,
Described LDO, for when the described power supply electrifying, starts working;
Described MCU, also for after starting working at described LDO, controls pin output high level to described MCU and enters described normal mode.
3. Saving Power Control Circuit according to claim 1 and 2, is characterized in that,
Described MCU controls pin and connects described switch pin by current-limiting circuit.
4. according to the Saving Power Control Circuit described in claims 1 to 3 any one, it is characterized in that,
Described MCU controls pin by preventing jittering circuit ground connection.
5. according to Saving Power Control Circuit described in claim 1 or 2, it is characterized in that,
Described MCU controls pin and connects described switch pin by current-limiting circuit and/or preventing jittering circuit.
6. according to Saving Power Control Circuit described in claim 1 to 5 any one, it is characterized in that,
Described power supply input pin is by holding circuit ground connection.
7. according to the Saving Power Control Circuit described in claim 1 to 6 any one, it is characterized in that,
Described power supply input pin is by the first capacity earth, and described power supply output pin is by the second capacity earth.
8. according to the Saving Power Control Circuit described in claim 1 to 7 any one, it is characterized in that,
Described default trigger condition is: the executable operations time does not surpass Preset Time to described MCU.
9. according to the Saving Power Control Circuit described in claim 1 to 7 any one, it is characterized in that,
Described MCU also comprises: trigger pin, described default trigger condition is: described triggering pin is triggered; Or
Described MCU also comprises: communication pin, described default trigger condition is: described communication pin receives and enters energy-saving mode instruction.
10. an electronic equipment, is characterized in that, comprises the Saving Power Control Circuit as described in claim 1 to 9 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410268178.4A CN104049549B (en) | 2014-06-16 | 2014-06-16 | Electricity-saving control circuit and electronic equipment |
| HK15100347.3A HK1199947A1 (en) | 2014-06-16 | 2015-01-13 | Power-saving control circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410268178.4A CN104049549B (en) | 2014-06-16 | 2014-06-16 | Electricity-saving control circuit and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104049549A true CN104049549A (en) | 2014-09-17 |
| CN104049549B CN104049549B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410268178.4A Active CN104049549B (en) | 2014-06-16 | 2014-06-16 | Electricity-saving control circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN104049549B (en) |
| HK (1) | HK1199947A1 (en) |
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| CN106293005A (en) * | 2016-08-09 | 2017-01-04 | 成都蓉芯微科技有限公司 | Reduce the system and method for MCU chip stand-by power consumption |
| CN113395668A (en) * | 2020-03-16 | 2021-09-14 | 无锡市铖月科技有限公司 | Low-power consumption communication control circuit |
| CN113948331A (en) * | 2021-10-14 | 2022-01-18 | 深圳市联洲国际技术有限公司 | Push type switch and communication equipment |
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| CN113948331B (en) * | 2021-10-14 | 2023-12-22 | 成都市联洲国际技术有限公司 | Push type switch and communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1199947A1 (en) | 2015-07-24 |
| CN104049549B (en) | 2017-04-19 |
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