CN201114007Y - Energy supply control circuit and mobile communication apparatus employing same - Google Patents
Energy supply control circuit and mobile communication apparatus employing same Download PDFInfo
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- CN201114007Y CN201114007Y CNU2007200273697U CN200720027369U CN201114007Y CN 201114007 Y CN201114007 Y CN 201114007Y CN U2007200273697 U CNU2007200273697 U CN U2007200273697U CN 200720027369 U CN200720027369 U CN 200720027369U CN 201114007 Y CN201114007 Y CN 201114007Y
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Abstract
The utility model discloses a power control circuit and a mobile communication apparatus which applies the circuit. The mobile communication apparatus comprises a system circuit and a power supply source which provides the operating voltage for the system circuit, wherein, a switching circuit is connected between a voltage output end of the power supply source and a power supply terminal of the system circuit; a control end of the switching circuit receives a switching control signal from the system circuit; and a gating end of the switching circuit is connected between the voltage output end of the power supply source and the power supply terminal of the system circuit. The utility model automatically cut off power supply of the power supply source to the system circuit when the system circuit detects that the power supply voltage of the power supply source is about to be lower than the minimum voltage under normal operation of a system through arrangement of the switching circuit between the power supply source of the system and the power supply terminal of the system circuit, thereby the whole system can achieve a stable state, which is helpful to improve the stability of complete operation of the whole mobile communication apparatus and improve the performance and the quality of products.
Description
Technical field
The utility model belongs to the power control circuit technical field, specifically, relates to a kind ofly when supply power voltage is low, avoids the control circuit of system works in labile state.
Background technology
Along with the continuous enhancing of cell-phone function, also more and more higher to the stability requirement of cell phone system.In present cell phone system, all be to adopt the power supply detection module that the energy of mobile phone power supply is detected, by in real time the electric weight size being presented on the mobile phone screen, can make the cellphone subscriber understand the current electric power thus supplied of own mobile phone easily, to help the user accurately to estimate remaining stand-by time or to remind the cellphone subscriber in time to charge, in order to avoid delay its normal use.
We know that the supply power voltage of cell phone system is when being lower than the required normal working voltage of system, and cell phone system can be in unsettled operating state, causes the generation of anomaly easily.And existing cell phone system, only be to provide guarantee for energy state that the user understands the cell phone system power supply immediately, but do not take any effective technical means to solve the problem of cell phone system operation irregularity under low-pressure state, this has caused influence for the normal stable operation of cell phone system undoubtedly, can't satisfy the high standard requirement of user to the mobile phone quality better.Therefore, how solving the problem of cell phone system job insecurity when its supply power voltage is lower than the normal working voltage of system, is subject matter to be solved in the utility model.
The utility model content
The purpose of this utility model is to provide a kind of power control circuit, by when system's supply power voltage is lower than the normal working voltage of system, in time cutting off the power supply of power supply to system, with the problem of effective resolution system operation irregularity under low-pressure state, guarantee that system is in stable operating state all the time.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of power control circuit, comprise circuit system and the power supply of operating voltage is provided for described circuit system, between the power supply terminal of the voltage output end of described power supply and circuit system, be connected with a switching circuit, the control end of described switching circuit receives the switch controlling signal from described circuit system, and the gating end is connected between the power supply terminal of the voltage output end of described power supply and circuit system.
Wherein, include power supply detection module and control circuit in described circuit system, described power supply detection module connects power supply, the electric weight of power supply is detected, and output detection signal is to described control circuit; Described control circuit generates switch controlling signal according to receiving detection signal, exports the control end of described switching circuit to.
Further, in described switching circuit, include a NPN type triode and a P channel MOS tube, the base stage of described NPN type triode connects the switch controlling signal output of described circuit system, grounded emitter, collector electrode connects the voltage output end of described power supply on the one hand by resistance, connect the grid of described P channel MOS tube on the other hand; The source electrode of described P channel MOS tube connects the voltage output end of described power supply, and drain electrode connects the power supply terminal of described circuit system.
Certainly, described switching circuit also can adopt a NPN type triode and two P channel MOS tubes to be formed by connecting.Wherein, the base stage of described NPN type triode connects the switch controlling signal output of described circuit system by potential-divider network, grounded emitter, collector electrode connect the voltage output end of described power supply on the one hand by resistance, connect the grid of two P channel MOS tubes on the other hand; The source electrode of a described P channel MOS tube connects the voltage output end of described power supply, and drain electrode connects the source electrode of the 2nd P channel MOS tube, and the drain electrode of described the 2nd P channel MOS tube connects the power supply terminal of described circuit system.
Based on above-mentioned power control circuit structure, the utility model has proposed a kind of mobile communication equipment with described power control circuit again, by between the power supply of mobile communication equipment and circuit system, setting up described switching circuit, when the output voltage that detects power supply is lower than the required minimum voltage of system's operate as normal, control described switching circuit and turn-off, keep the purpose that whole cell phone system always works in stable state thereby reach.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by being provided with switching circuit between the power supply terminal of system's power supply and circuit system, when the supply power voltage that detects power supply at circuit system is about to be lower than the minimum voltage of system's operate as normal, automatically shut down the power supply of power supply, thereby make whole system can reach a stable status to circuit system.Described circuit application in present mobile communication equipment, can effectively be solved the job insecurity problem that portable terminal occurs when its supply power voltage is low, helps to promote the stability and the complete machine performance of mobile communication equipment work.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of embodiment of the power control circuit that proposes of the utility model;
Fig. 2 is the circuit theory diagrams of the another kind of embodiment of the power control circuit that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is done explanation in further detail.
The utility model is in order to satisfy user's job stability requirement growing to cell phone system, adopt the low voltage control technology to make the supply power voltage of cell phone system when being lower than the required normal working voltage of circuit system, can reach a stable status, specifically adopted the design philosophy that between mobile phone power supply and circuit system, increases switching circuit.Wherein, when the cell phone system operate as normal, utilize the power supply detection module in the cell phone system circuit that the electric weight of power supply is detected in real time, and the control circuit of output detection signal to the circuit system.Described circuit system can specifically refer to the main process chip in the cell phone system, and described main process chip shows current electric quantity by mobile phone screen to the user on the one hand in real time according to the detection signal that receives; Be converted to the control end that corresponding switch controlling signal exports switching circuit on the other hand, control with on off operating mode to described switching circuit.Specifically, when the electric weight that detects the mobile phone power supply can satisfy circuit system operate as normal required voltage, main process chip output control signal is controlled described switching circuit conducting, promptly be communicated with the connecting path between the power supply terminal of described power supply and circuit system, make power supply normally provide operating voltage for circuit system.And the output voltage that detects power supply when the power supply detection module reminds the user mobile phone electric weight low excessively by mobile phone screen when being about to be lower than the required minimum voltage of circuit system operate as normal on the one hand, is about to shutdown; Control the machine system circuit on the other hand and enter off-mode, and by main process chip output control signal to turn-off described switching circuit, and then the cut-out power supply is to the power supply of circuit system, guarantee that circuit system can remain on a kind of stable status under low-pressure state, to improve the stability of circuit system work, avoid user mobile phone anomaly to occur.
In the utility model, described switching circuit can adopt multiple version to realize, is that example is specifically addressed the switching circuit structure that the utility model was proposed with two kinds of circuit structures of Fig. 1, Fig. 2 only below.
Embodiment one, and referring to shown in Figure 1, in the present embodiment, described switching circuit adopts a NPN type triode V1 and a P channel MOS tube V2 (a P channel MOS tube) to be formed by connecting.Wherein, the base stage of NPN type triode V1 connects the switch controlling signal output of described main process chip by the potential-divider network of being made up of resistance R 1, R2, and described switch controlling signal output can select for use wherein one road GPIO mouth of main process chip or DAC cause for gossip existing.The grounded emitter of NPN type triode V1, collector electrode connect the voltage output end VBAT of power supply on the one hand by resistance R 3, connect the grid of described P channel MOS tube V2 on the other hand; The source electrode of described P channel MOS tube V2 connects the voltage output end VBAT of power supply, the power supply terminal VAT_D of drain electrode connected system circuit.
Its operation principle is: when the power supply detection module detects power supply sufficient electric weight is arranged, by main process chip output high level switch controlling signal MD, control described NPN type triode V1 conducting.Because the conducting of NPN type triode V1 is dragged down the grid potential of P channel MOS tube V2, thereby makes P channel MOS tube V2 be in conducting state,, make circuit system get electric operate as normal to be communicated with the connecting path between power supply and the circuit system.And the output voltage that detects power supply when the power supply detection module by main process chip output low level switch controlling signal MD, ends NPN type triode V1 when being about to be lower than the required minimum voltage of the normal operation of system.At this moment, P channel MOS tube V2 ends owing to its source voltage equals its grid voltage, thereby cuts off the power supply of power supply to circuit system, to avoid the generation of circuit system wild effect under the operating on low voltage state.
For the accuracy that improves switching circuit work and the stability of power supply output voltage, between the power supply terminal VAT_D of the drain electrode of described P channel MOS tube V2 and circuit system, can also connect one road P channel MOS tube V3 (the 2nd P channel MOS tube) again.The grid of described P channel MOS tube V3 connects the collector electrode of NPN type triode V1, and source electrode connects the drain electrode of P channel MOS tube V2, the power supply terminal VAT_D of drain electrode connected system circuit.When P channel MOS tube V2 conducting, the source voltage of metal-oxide-semiconductor V3 also is in conducting state greater than its grid voltage; And when P channel MOS tube V2 ended, metal-oxide-semiconductor V3 ended owing to its source voltage is equal to or less than its grid voltage, thereby can effectively guarantee the break-make sequential of switching circuit.
Why present embodiment adopts metal-oxide-semiconductor to be connected between power supply and the circuit system, is to have made full use of the characteristic that metal-oxide-semiconductor conducting electric current is big, conducting resistance is little, to reach the purpose that reduces energy loss.Certainly, switching circuit of the present utility model is not limited in above-mentioned giving an example, adopt the transistor of at present common relay, integrated switch chip or other types to cooperate simple peripheral circuit equally can realize purpose of design of the present utility model, the utility model does not specifically limit this yet.
Power control circuit of the present utility model is simple in structure, and is with low cost, can be widely used in the mobile communication equipments such as mobile phone, Personal Handyphone System, walkie-talkie, and the stability of moving to machine system provides powerful guarantee.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1, a kind of power control circuit, comprise circuit system and the power supply of operating voltage is provided for described circuit system, it is characterized in that: between the power supply terminal of the voltage output end of described power supply and circuit system, be connected with a switching circuit, the control end of described switching circuit receives the switch controlling signal from described circuit system, and the gating end is connected between the power supply terminal of the voltage output end of described power supply and circuit system.
2, power control circuit according to claim 1, it is characterized in that: in described circuit system, include power supply detection module and control circuit, described power supply detection module connects power supply, the electric weight of power supply is detected, and output detection signal is to described control circuit; Described control circuit generates switch controlling signal according to receiving detection signal, exports the control end of described switching circuit to.
3, power control circuit according to claim 1 and 2, it is characterized in that: in described switching circuit, include a NPN type triode and a P channel MOS tube, the base stage of described NPN type triode connects the switch controlling signal output of described circuit system, grounded emitter, collector electrode connects the voltage output end of described power supply on the one hand by resistance, connect the grid of described P channel MOS tube on the other hand; The source electrode of described P channel MOS tube connects the voltage output end of described power supply, and drain electrode connects the power supply terminal of described circuit system.
4, power control circuit according to claim 1 and 2, it is characterized in that: in described switching circuit, include a NPN type triode and two P channel MOS tubes, the base stage of described NPN type triode connects the switch controlling signal output of described circuit system, grounded emitter, collector electrode connects the voltage output end of described power supply on the one hand by resistance, connect the grid of two P channel MOS tubes on the other hand; The source electrode of a described P channel MOS tube connects the voltage output end of described power supply, and drain electrode connects the source electrode of the 2nd P channel MOS tube; The drain electrode of described the 2nd P channel MOS tube connects the power supply terminal of described circuit system.
5, power control circuit according to claim 4 is characterized in that: the base stage of described NPN type triode connects the switch controlling signal output of described circuit system by potential-divider network.
6, a kind of mobile communication equipment with power control circuit comprises circuit system and the power supply of operating voltage is provided for described circuit system in described mobile communication equipment; It is characterized in that: between the power supply terminal of the voltage output end of described power supply and circuit system, be connected with a switching circuit, the control end of described switching circuit receives the switch controlling signal from described circuit system, and the gating end is connected between the power supply terminal of the voltage output end of described power supply and circuit system.
7, mobile communication equipment according to claim 6, it is characterized in that: in described circuit system, include power supply detection module and control circuit, described power supply detection module connects power supply, the electric weight of power supply is detected, and output detection signal is to described control circuit; Described control circuit generates switch controlling signal according to receiving detection signal, exports the control end of described switching circuit to.
8, according to claim 6 or 7 described mobile communication equipments, it is characterized in that: in described switching circuit, include a NPN type triode and a P channel MOS tube, the base stage of described NPN type triode connects the switch controlling signal output of described circuit system, grounded emitter, collector electrode connects the voltage output end of described power supply on the one hand by resistance, connect the grid of described P channel MOS tube on the other hand; The source electrode of described P channel MOS tube connects the voltage output end of described power supply, and drain electrode connects the power supply terminal of described circuit system.
9, according to claim 6 or 7 described mobile communication equipments, it is characterized in that: in described switching circuit, include a NPN type triode and two P channel MOS tubes, the base stage of described NPN type triode connects the switch controlling signal output of described circuit system, grounded emitter, collector electrode connects the voltage output end of described power supply on the one hand by resistance, connect the grid of two P channel MOS tubes on the other hand; The source electrode of a described P channel MOS tube connects the voltage output end of described power supply, and drain electrode connects the source electrode of the 2nd P channel MOS tube, and the drain electrode of described the 2nd P channel MOS tube connects the power supply terminal of described circuit system.
10, mobile communication equipment according to claim 9 is characterized in that: the base stage of described NPN type triode connects the switch controlling signal output of described circuit system by potential-divider network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200273697U CN201114007Y (en) | 2007-09-05 | 2007-09-05 | Energy supply control circuit and mobile communication apparatus employing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200273697U CN201114007Y (en) | 2007-09-05 | 2007-09-05 | Energy supply control circuit and mobile communication apparatus employing same |
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| Publication Number | Publication Date |
|---|---|
| CN201114007Y true CN201114007Y (en) | 2008-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200273697U Expired - Fee Related CN201114007Y (en) | 2007-09-05 | 2007-09-05 | Energy supply control circuit and mobile communication apparatus employing same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977858A (en) * | 2014-04-04 | 2015-10-14 | 惠州市德赛西威汽车电子有限公司 | Control method of vehicle-mounted electronic device turn-on and turn-off |
| CN107869932A (en) * | 2017-11-21 | 2018-04-03 | 西安航天动力技术研究所 | A kind of metal-oxide-semiconductor formula firing circuit for launching control equipment |
| CN109358180A (en) * | 2018-09-08 | 2019-02-19 | 吉睿智控科技（天津）有限公司 | Wind turbine generator lubricating oil on-line monitoring system and monitoring method |
| CN110416986A (en) * | 2019-07-02 | 2019-11-05 | 昆山嘉提信息科技有限公司 | For quick discharging circuit after the shutdown of mainboard |
| CN111857322A (en) * | 2020-06-19 | 2020-10-30 | 海信（山东）冰箱有限公司 | Method and device for reducing standby power consumption of washing machine, washing machine and related equipment |
| CN113495208A (en) * | 2021-06-10 | 2021-10-12 | 广州亚美信息科技有限公司 | Power circuit testing device, system and method for mounting circuit board |
-
2007
- 2007-09-05 CN CNU2007200273697U patent/CN201114007Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977858A (en) * | 2014-04-04 | 2015-10-14 | 惠州市德赛西威汽车电子有限公司 | Control method of vehicle-mounted electronic device turn-on and turn-off |
| CN104977858B (en) * | 2014-04-04 | 2017-12-22 | 惠州市德赛西威汽车电子股份有限公司 | A kind of control method of vehicle electronic device switching on and shutting down |
| CN107869932A (en) * | 2017-11-21 | 2018-04-03 | 西安航天动力技术研究所 | A kind of metal-oxide-semiconductor formula firing circuit for launching control equipment |
| CN109358180A (en) * | 2018-09-08 | 2019-02-19 | 吉睿智控科技（天津）有限公司 | Wind turbine generator lubricating oil on-line monitoring system and monitoring method |
| CN110416986A (en) * | 2019-07-02 | 2019-11-05 | 昆山嘉提信息科技有限公司 | For quick discharging circuit after the shutdown of mainboard |
| CN111857322A (en) * | 2020-06-19 | 2020-10-30 | 海信（山东）冰箱有限公司 | Method and device for reducing standby power consumption of washing machine, washing machine and related equipment |
| CN113495208A (en) * | 2021-06-10 | 2021-10-12 | 广州亚美信息科技有限公司 | Power circuit testing device, system and method for mounting circuit board |
| CN113495208B (en) * | 2021-06-10 | 2023-12-26 | 广州亚美信息科技有限公司 | Device, system and method for testing power supply circuit of packaged circuit board |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |