CN104092451A - Power consumption switching control circuit - Google Patents
Power consumption switching control circuit Download PDFInfo
- Publication number
- CN104092451A CN104092451A CN201410271890.XA CN201410271890A CN104092451A CN 104092451 A CN104092451 A CN 104092451A CN 201410271890 A CN201410271890 A CN 201410271890A CN 104092451 A CN104092451 A CN 104092451A
- Authority
- CN
- China
- Prior art keywords
- switch
- pmos pipe
- ldo
- connects
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electronic Switches (AREA)
Abstract
The invention discloses a power consumption switching control circuit. The structure of the power consumption switching control circuit is that a first current mirror passes through a first switch and a first resistor which are sequentially in series connection to be connected to the ground, one end of a second switch is connected to a second current mirror, and the other end of the second switch is connected with the first switch and the public end of a first resistor. The first switch and the public end of the first resistor pass through a first capacitor and then are connected to the ground, and the first switch and the public end of the first resistor are connected with the input end of a voltage judgment module. The output end of the voltage judgment module is connected with the input end of a starting module and the input end of a delay module respectively. The first output end of the starting module outputs control signals of the second switch, and the second output end of the starting module is connected with the enable end of a second LDO. The output end of the delay module outputs control signals of the first switch. According to the power consumption switching control circuit, a digital logic unit is used for achieving real-time quick switching of a circuit in different power states.
Description
Technical field
The invention belongs to integrated circuit (IC) design field, particularly a kind of power consumption control switching circuit.
Background technology
Along with popularizing of the portable sets such as panel computer, smart mobile phone, intelligent glasses and handheld device, people are more and more higher to the requirement of service time of battery length.Generally, when equipment is during in holding state, can enter little electric current, low power consumpting state, and then save certain electric weight; And when equipment is during in normal operating conditions, need to carry out to circuit the switching of state, provide suitable voltage, large electric current so that circuit can be worked normally.Yet, while switching, need guarantee certain real-time between holding state and normal operating conditions, so just can make equipment respond fast.
Summary of the invention
The problem existing in order to solve above-mentioned background technology, the present invention aims to provide a kind of power consumption control switching circuit, realizes the switching real-time between circuit different capacity state.
In order to realize above-mentioned technical purpose, technical scheme of the present invention:
A kind of power consumption control switching circuit, for the switching of control load circuit between holding state and normal operating conditions, described load circuit connects respectively a LDO and the 2nd LDO, the power of the one LDO is less than the 2nd LDO, when load circuit is in holding state, the one LDO work, when load circuit is in normal operating conditions, the 2nd LDO work, it is characterized in that: described power consumption commutation circuit comprises the first current mirror, the second current mirror, the first switch, second switch, the first resistance, the first electric capacity, voltage block module, opening module and time delay module, described the first current mirror through successively series connection the first switch and the first resistance after ground connection, one end of second switch connects the second current mirror, the other end connects the common port of the first switch and the first resistance, the common port of the first switch and the first resistance is ground connection after the first electric capacity, the first switch is connected the input of voltage block module with the common port of the first resistance, the output of voltage block module connects respectively the input of opening module and the input of time delay module, the first output output second switch control signal of opening module, control the folding of second switch, the second output of opening module connects the Enable Pin of the 2nd LDO, control the keying of the 2nd LDO, the output of time delay module is exported the first switch controlling signal, control the folding of the first switch.
Wherein, above-mentioned opening module comprises a PMOS pipe, the 2nd PMOS pipe, the one NMOS pipe and the 2nd NMOS pipe, the source electrode of a described PMOS pipe connects the drain electrode of a NMOS pipe, the grid of the one PMOS pipe connects the grid of a NMOS pipe, the source electrode of the 2nd PMOS pipe connects the drain electrode of the 2nd NMOS pipe, the grid of the 2nd PMOS pipe connects the grid of the 2nd NMOS pipe, the source electrode of the one PMOS pipe connects the grid of the 2nd NMOS pipe, the drain electrode access direct voltage of the one PMOS pipe and the 2nd PMOS pipe, the source ground of the one PMOS pipe and the 2nd PMOS pipe, the grid of the one PMOS pipe connects the output of voltage block module, the source electrode output second switch control signal of the one PMOS pipe, the source electrode of the 2nd PMOS pipe connects the Enable Pin of the 2nd LDO.
Wherein, above-mentioned voltage block module is Schmidt trigger.
The beneficial effect that adopts technique scheme to bring:
(1) of the present invention simple in structure, adopt digital logic unit to realize, stand-by power consumption and quiescent current power consumption are almost negligible, are particularly suitable for ultralow Consumption.Digital logic gate structural response speed is enough fast simultaneously, meets Realism Design requirement, guarantees real-time control and the switching of a LDO and the 2nd LDO;
(2) the present invention adopts Schmidt trigger to realize voltage block module, and the one, simple in structure because it is realized, the 2nd, because can make full use of the hesitation that itself has, prevent from differentiating the electrical voltage point appearance phenomenon of concussion repeatedly.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention.
Fig. 2 is the circuit diagram of opening module of the present invention.
The voltage oscillogram of each point when Fig. 3 is the first switch closure, second switch disconnection.
The voltage oscillogram of each point when Fig. 4 is the first switch disconnection, second switch closure.
Main symbol description: K1 in accompanying drawing: the first switch, K2: second switch, R1: the first resistance, C1: the first electric capacity, I1: the first current mirror output current, I2: the second current mirror output current.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is elaborated.
Structure chart of the present invention as shown in Figure 1, a kind of power consumption control switching circuit, for the switching of control load circuit between holding state and normal operating conditions, described load circuit connects respectively a LDO and the 2nd LDO (low dropout regulator), the power of the one LDO is less than the 2nd LDO, when load circuit is in holding state, and a LDO job, when load circuit is in normal operating conditions, the 2nd LDO work.This power consumption control switching circuit comprises the first current mirror, the second current mirror, the first K switch 1, second switch K2, the first resistance R 1, the first capacitor C 1, voltage block module, opening module and time delay module, described the first current mirror through successively series connection the first K switch 1 and the first resistance R 1 after ground connection, one end of second switch K2 connects the second current mirror, the other end connects the common port of the first K switch 1 and the first resistance R 1, the common port of the first K switch 1 and the first resistance R 1 is ground connection after the first capacitor C 1, the first K switch 1 is connected the input of voltage block module with the common port of the first resistance R 1, the output of voltage block module connects respectively the input of opening module and the input of time delay module, the first output output second switch control signal of opening module, control the folding of second switch K2, the second output of opening module connects the Enable Pin of the 2nd LDO, be used for enabling the 2nd LDO, thereby the state of switch load circuit, the output of time delay module is exported the first switch controlling signal, control the folding of the first K switch 1.
In the present embodiment, voltage judging module is Schmidt trigger.
In the present embodiment, as shown in Figure 2, opening module comprises a PMOS pipe, the 2nd PMOS pipe, the one NMOS pipe and the 2nd NMOS pipe, the source electrode of a described PMOS pipe connects the drain electrode of a NMOS pipe, the grid of the one PMOS pipe connects the grid of a NMOS pipe, the source electrode of the 2nd PMOS pipe connects the drain electrode of the 2nd NMOS pipe, the grid of the 2nd PMOS pipe connects the grid of the 2nd NMOS pipe, the source electrode of the one PMOS pipe connects the grid of the 2nd NMOS pipe, the drain electrode access direct voltage of the one PMOS pipe and the 2nd PMOS pipe, the source ground of the one PMOS pipe and the 2nd PMOS pipe, the grid of the one PMOS pipe connects the output of voltage block module, the source electrode output second switch control signal of the one PMOS pipe, the source electrode of the 2nd PMOS pipe connects the Enable Pin of the 2nd LDO.
Operation principle of the present invention is:
Utilize Schmidt trigger that two voltage determination point Vs1 and Vs2 are set, generally can consider Vs1=1/3*VDD, Vs2=2/3*VDD, VDD is supply voltage.According to these two voltage determination points, the present invention has three kinds of operating states.
State 1: load circuit keeps low load current, and load circuit is in holding state.The one LDO opens, the first K switch 1 closure now, and the output current I1 of the first current mirror is LDO load current image current according to a certain percentage.Now the input voltage of Schmidt trigger is I1*R1, and I1*R1<Vs2, keeps second switch K2 to disconnect, and the 2nd LDO is not enabled and wakes up.
State 2: when load circuit enters high load currents, load circuit switches to normal operating conditions from holding state.The load of the one LDO strengthens, and I1 is corresponding increase also, if I1*R1>Vs2, second switch K2 is closed, and opening module is sent enable signal simultaneously, and the 2nd LDO is enabled and wakes up, through a bit of time delay (as required, general a few uS is to tens uS) the first K switch 1, disconnect.As shown in Figure 3, this figure abscissa is the time, and unit is microsecond, and ordinate is followed successively by Schmidt trigger input terminal voltage V1in, Schmidt trigger output end voltage V1out, the first K switch 1 voltage, second switch K2 voltage from top to bottom, and unit is volt.V1in=I1*R1 at the beginning, as long as the differentiation point Vs2(that V1in is less than judging circuit herein Vs2 is 2V), K1 is closed, K2 disconnects, and supposes in figure that, from 6uS, it is large that load current starts to become, after V1in arrives 2V, K2 is conducting at once, and the 2nd LDO is enabled and wakes up simultaneously, and K1 is closed through time delay after a while (being 10.5uS) herein.
State 3: reduce to low load current when load circuit from high load currents, load circuit switches to holding state from normal operating conditions.Second switch K2 is closed at the beginning, the output current I2 of the second current mirror is the 2nd LDO load current image current according to a certain percentage, when circuit is reduced to low load current from high load currents, I2 is corresponding to be reduced, and works as I2*R1<Vs1, and second switch K2 disconnects, opening module is controlled the 2nd LDO dormancy simultaneously, closed through a bit of time delay (as required, general several uS are to tens uS) K1, circuit gets the hang of 1.As shown in Figure 4, this figure abscissa is the time, and unit is microsecond, and ordinate is followed successively by Schmidt trigger input terminal voltage V1in, Schmidt trigger output end voltage V1out, the first K switch 1 voltage, second switch K2 voltage from top to bottom, and unit is volt.V1in=I2*R1 at the beginning, as long as the differentiation point Vs1(that V1in is greater than judging circuit herein Vs1 is 1V), K1 disconnects, K2 is closed, supposes in figure that, from 51uS, load current starts to diminish, when V1in drops to 1V, K2 is closed immediately, the 2nd LDO dormancy simultaneously, and K1 is again closed through time delay after a while (being 10.5uS) herein.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection range of the present invention.
Claims (3)
1. a power consumption control switching circuit, for the switching of control load circuit between holding state and normal operating conditions, described load circuit connects respectively a LDO and the 2nd LDO, the power of the one LDO is less than the 2nd LDO, when load circuit is in holding state, the one LDO work, when load circuit is in normal operating conditions, the 2nd LDO work, it is characterized in that: described power consumption commutation circuit comprises the first current mirror, the second current mirror, the first switch, second switch, the first resistance, the first electric capacity, voltage block module, opening module and time delay module, described the first current mirror through successively series connection the first switch and the first resistance after ground connection, one end of second switch connects the second current mirror, the other end connects the common port of the first switch and the first resistance, the common port of the first switch and the first resistance is ground connection after the first electric capacity, the first switch is connected the input of voltage block module with the common port of the first resistance, the output of voltage block module connects respectively the input of opening module and the input of time delay module, the first output output second switch control signal of opening module, control the folding of second switch, the second output of opening module connects the Enable Pin of the 2nd LDO, control the keying of the 2nd LDO, the output of time delay module is exported the first switch controlling signal, control the folding of the first switch.
2. a kind of power consumption control switching circuit according to claim 1, it is characterized in that: described opening module comprises a PMOS pipe, the 2nd PMOS pipe, the one NMOS pipe and the 2nd NMOS pipe, the source electrode of a described PMOS pipe connects the drain electrode of a NMOS pipe, the grid of the one PMOS pipe connects the grid of a NMOS pipe, the source electrode of the 2nd PMOS pipe connects the drain electrode of the 2nd NMOS pipe, the grid of the 2nd PMOS pipe connects the grid of the 2nd NMOS pipe, the source electrode of the one PMOS pipe connects the grid of the 2nd NMOS pipe, the drain electrode access direct voltage of the one PMOS pipe and the 2nd PMOS pipe, the source ground of the one PMOS pipe and the 2nd PMOS pipe, the grid of the one PMOS pipe connects the output of voltage block module, the source electrode output second switch control signal of the one PMOS pipe, the source electrode of the 2nd PMOS pipe connects the Enable Pin of the 2nd LDO.
3. according to a kind of power consumption control switching circuit described in claim 1 or 2, it is characterized in that: described voltage block module is Schmidt trigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271890.XA CN104092451B (en) | 2014-06-18 | 2014-06-18 | Power consumption switching control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271890.XA CN104092451B (en) | 2014-06-18 | 2014-06-18 | Power consumption switching control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104092451A true CN104092451A (en) | 2014-10-08 |
| CN104092451B CN104092451B (en) | 2017-01-25 |
Family
ID=51640138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410271890.XA Active CN104092451B (en) | 2014-06-18 | 2014-06-18 | Power consumption switching control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104092451B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846812A (en) * | 2016-05-27 | 2016-08-10 | 南京德睿智芯电子科技有限公司 | Current automatic switching circuit and implementation method thereof |
| CN109412436A (en) * | 2018-11-26 | 2019-03-01 | 茂睿芯（深圳）科技有限公司 | A kind of synchronous rectification control chip and circuit |
| CN110263468A (en) * | 2019-06-26 | 2019-09-20 | 湖南国科微电子股份有限公司 | A kind of interior CMOS capacitor and a kind of chip |
| CN112286334A (en) * | 2020-10-30 | 2021-01-29 | 广州鸿博微电子技术有限公司 | Low-power-consumption power supply switching circuit for MCU and implementation method thereof |
| CN113364442A (en) * | 2020-03-02 | 2021-09-07 | 圣邦微电子（北京）股份有限公司 | Starting circuit and chip |
| CN116073657A (en) * | 2023-03-09 | 2023-05-05 | 钰泰半导体股份有限公司 | Discrete power supply chip |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63245236A (en) * | 1987-03-31 | 1988-10-12 | 株式会社東芝 | Electric source switching circuit |
| CN103488270B (en) * | 2012-06-13 | 2016-07-06 | 神讯电脑(昆山)有限公司 | Electricity saving method and electronic installation thereof |
| TWI475368B (en) * | 2012-11-21 | 2015-03-01 | Giga Byte Tech Co Ltd | Power control system and method thereof |
| CN204046555U (en) * | 2014-06-18 | 2014-12-24 | 无锡芯响电子科技有限公司 | A kind of power consumption control switching circuit |
-
2014
- 2014-06-18 CN CN201410271890.XA patent/CN104092451B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846812A (en) * | 2016-05-27 | 2016-08-10 | 南京德睿智芯电子科技有限公司 | Current automatic switching circuit and implementation method thereof |
| CN105846812B (en) * | 2016-05-27 | 2019-02-15 | 南京德睿智芯电子科技有限公司 | A kind of electric current automatic switch-over circuit and its implementation |
| CN109412436A (en) * | 2018-11-26 | 2019-03-01 | 茂睿芯（深圳）科技有限公司 | A kind of synchronous rectification control chip and circuit |
| CN109412436B (en) * | 2018-11-26 | 2024-02-09 | 茂睿芯（深圳）科技有限公司 | Synchronous rectification control chip and circuit |
| CN110263468A (en) * | 2019-06-26 | 2019-09-20 | 湖南国科微电子股份有限公司 | A kind of interior CMOS capacitor and a kind of chip |
| CN113364442A (en) * | 2020-03-02 | 2021-09-07 | 圣邦微电子（北京）股份有限公司 | Starting circuit and chip |
| CN113364442B (en) * | 2020-03-02 | 2022-10-14 | 圣邦微电子（北京）股份有限公司 | Starting circuit and chip |
| CN112286334A (en) * | 2020-10-30 | 2021-01-29 | 广州鸿博微电子技术有限公司 | Low-power-consumption power supply switching circuit for MCU and implementation method thereof |
| CN112286334B (en) * | 2020-10-30 | 2021-07-23 | 广州鸿博微电子技术有限公司 | Low-power-consumption power supply switching circuit for MCU and implementation method thereof |
| CN116073657A (en) * | 2023-03-09 | 2023-05-05 | 钰泰半导体股份有限公司 | Discrete power supply chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104092451B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104092451B (en) | Power consumption switching control circuit | |
| CN103178583B (en) | Mobile phone USB (Universal Serial Bus) interface charging system supporting charging for other mobile devices and charging realization method of mobile phone USB interface charging system | |
| CN204929366U (en) | DALI interface circuit | |
| CN103928958A (en) | Lithium battery charging or discharging management circuit and lithium battery management system | |
| CN205544400U (en) | Battery management system of low -power consumption standby | |
| CN106532867B (en) | A kind of charging circuit and mobile terminal | |
| WO2018224010A9 (en) | Power supply conversion circuit, charging device, and system | |
| CN102255345A (en) | Double-cell power supply circuit | |
| CN105529816A (en) | Method and device for power source switching, and hand-held terminal | |
| CN104052133A (en) | Output protection circuit of charger of electric vehicle | |
| CN103997552A (en) | Mobile phone mobile terminal and control method thereof | |
| CN203632308U (en) | Charger | |
| CN103326459B (en) | Low-voltage direct-current power supply switchover circuit and direct-current power supply | |
| CN107733413B (en) | Intelligent switch circuit and intelligent terminal of pre-installation battery system | |
| CN105988549B (en) | A kind of electronic equipment with extremely low quiescent current | |
| CN206226057U (en) | A kind of power control circuit and portable power source for portable power source | |
| CN204046555U (en) | A kind of power consumption control switching circuit | |
| CN101873346A (en) | Remote on-off control system | |
| CN103997101B (en) | A kind of charging circuit and a kind of electronic equipment | |
| CN204012767U (en) | A kind of charging and discharging lithium battery management circuit and lithium battery management system | |
| CN203643814U (en) | Digital quantity output circuit and digital quantity output board card | |
| CN202918001U (en) | Low-voltage starting device | |
| CN214540710U (en) | Low-power consumption circuit and display screen system | |
| CN105846809B (en) | A kind of buffer circuit and buffer chip | |
| CN204216633U (en) | A kind of li-ion cell protection device integrated circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |