CN203193589U - Power source control circuit and electronic product with slow-start control - Google Patents
Power source control circuit and electronic product with slow-start control Download PDFInfo
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- CN203193589U CN203193589U CN 201320221188 CN201320221188U CN203193589U CN 203193589 U CN203193589 U CN 203193589U CN 201320221188 CN201320221188 CN 201320221188 CN 201320221188 U CN201320221188 U CN 201320221188U CN 203193589 U CN203193589 U CN 203193589U
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Abstract
The utility model discloses a power source control circuit and an electronic product with slow-start control. The circuit is provided with a P-channel power tube, a capacitor, and a discharge control circuit used for discharging the charge in the capacitor. The source of the power tube is connected with a power source input terminal, the drain of the power tube is connected with a power source output terminal, and the gate of the power tube is connected with the capacitor and the power source input terminal. The positive electrode of the capacitor is connected to the discharge control circuit. The control end of the discharge control circuit receives power source switching signals. With the circuit provided by the utility model, power supply outputted from the power source circuit can be subjected to slow-start control, such that the generation of instantaneous large current at the power supply connection moment caused by the influence of backend capacitive load can be avoided. Therefore, the backend load can be protected, and system operation reliability can be ensured. When the power source control circuit with the slow-start control is applied in an electronic product, the system can operate normally when the power supply is connected, and damage to the components and system abnormal problems can be avoided.
Description
Technical field
The utility model belongs to the power circuit technical field, specifically, relates to a kind of for the electronic product that the power supply of power circuit output is realized opening the power control circuit of sequencing control and adopted described power control circuit design.
Background technology
Along with warming day by day of global climate, energy-saving and emission-reduction have become the most important thing of national governments work, and particularly household electric appliances closely bound up with daily life are pulled to the teeth of the storm especially.In American-European market, low standby power loss becomes the pass that electronic product is sold to this market with safety, EMI, and high efficiency, low-power consumption have become household appliances one of necessary key factor of considering on stream.
At present, China requires below 1W for the stand-by power consumption of household appliances, for the stand-by power consumption that makes electronic product meets national standard, require electronic product after entering standby mode, cut off the power supply of peripheral circuit, make peripheral circuit enter closed condition, to avoid producing extra power consumption.Adopt this Opportunity awaiting control for linear mode, when electronic product changed the startup operational mode over to again by standby mode, the power supply of exporting by power circuit directly transferred to peripheral circuit, was the peripheral circuit power supply.This supply power mode, when having capacitive load in the peripheral circuit, power supply is being opened moment, can transient high-current occur under the influence of rear end capacitive load, causes the damage of peripheral circuit components and parts.
Summary of the invention
It is a kind of with the power control circuit that has delayed control that the purpose of this utility model is to provide, slowly open-minded by the power supply of control power circuit output, to avoid occurring very big immediate current, realizes the effective protection to the rear end load.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of with the power control circuit that has delayed control, as to be provided with P channel power pipe, electric capacity and to be used for the electric charge of electric capacity is released charge/discharge control circuit; The source electrode of described P channel power pipe connects power input terminal, and drain electrode connects power output terminal, and grid connects electric capacity and links to each other with described power input terminal; The positive pole of described electric capacity connects charge/discharge control circuit, and the control end of described charge/discharge control circuit receives power switch signal.
Further, be provided with a switching circuit in described charge/discharge control circuit, the switch ways of described switching circuit is connected between the positive pole and ground of electric capacity, and the control end of switching circuit receives described power switch signal.
Preferably, in connecting the circuit of positive pole of described electric capacity, the switch ways of described switching circuit is in series with bleeder resistance.
A kind of preferred design as described switching circuit, in described switching circuit, be provided with a NPN type triode, the collector electrode of described NPN type triode connects the positive pole of described electric capacity by the bleeder resistance of series connection, the grounded emitter of NPN type triode, base stage receives described power switch signal.
Further again, the grid of described P channel power pipe connects described power input terminal by current-limiting resistance.
Further again, the control end of described charge/discharge control circuit connects processor, the power switch signal of receiving processor output.
Preferably, described processor is the standby microprocessor, i.e. the microprocessor that moves during standby, and described standby receives standby signal with microprocessor, generates and export described power switch signal according to described standby signal.
Preferably, described P channel power pipe preferably adopts the P-channel enhancement type metal-oxide-semiconductor.
The power control circuit that has delayed control based on above-mentioned band, the utility model has also proposed the electronic product that a kind of power control circuit that adopts described band to delay control designs, and the internal circuit board of described electronic product is provided with power circuit, has delayed the power control circuit of control with electric loading and described band; The charge/discharge control circuit that in described power control circuit, is provided with P channel power pipe, electric capacity and is used for the electric charge of electric capacity is released; The source electrode of described P channel power pipe connects power input terminal, and drain electrode connects power output terminal, and grid connects electric capacity and links to each other with described power input terminal; The positive pole of described electric capacity connects charge/discharge control circuit, and the control end of described charge/discharge control circuit receives power switch signal; In described power control circuit, power input terminal connects described power circuit, receives the power supply of power circuit output; Power output terminal connects the described electric loading of using, to exporting power supply with electric loading.
Further, have at least one to be capacitive load described in electric loading.
Compared with prior art; advantage of the present utility model and good effect are: the utility model is by increasing the power control circuit that band has delayed control at power circuit and between with electric loading; the power supply of power circuit being exported by this power control circuit has delayed control; can avoid thus opening moment at power supply; cause the generation of instantaneous large-current owing to the influence of rear end capacitive load; effectively protect the rear end load, guaranteed reliability of system operation.The power control circuit that described band has been delayed control is applied in the electronic product, and the system that can guarantee can normally move when power supply is opened, and avoids occurring the damage of element device and the generation of system exception problem.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below.Apparently, the accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of a kind of embodiment of band that the utility model the proposes power control circuit that delayed control.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described.Obviously, described embodiment only is a part of embodiment in the utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiment that obtain under the creative work prerequisite, all belong to the scope of the utility model protection.
For the advantage that makes technical solutions of the utility model is clearer, below in conjunction with drawings and Examples the utility model is explained.
Embodiment one; present embodiment has delayed control for the power supply to power circuit output; to avoid occurring very big transient current; set up the power control circuit that band has delayed control at the power circuit of electronic product inside and between with electric loading; slowly open-minded with the control power supply; avoid the components and parts of rear end are caused rush of current the protection electric loading.
The power control circuit that the band of present embodiment has delayed control is mainly formed by a P channel power pipe, electric capacity and charge/discharge control circuit establishment.Wherein, P channel power pipe is used for the transmission channel of power supply is carried out break-make control, and the power tube that can select for use the big electric currents of support such as MOSFET, IGBT to pass through carries out circuit design.Present embodiment is that example is specifically described with P-channel enhancement type metal-oxide-semiconductor Q1, referring to shown in Figure 1.The source S of P-channel enhancement type metal-oxide-semiconductor Q1 is connected power input terminal, connect power circuit by power input terminal, receive the power supply VCC of power circuit output.The drain D of P-channel enhancement type metal-oxide-semiconductor Q1 is connected power output terminal, connect the electric loading of use of rear end by power output terminal, export power supply VCC-1 for the rear end with electric loading.In the usefulness electric loading of rear end, have at least one to be capacitive load with electric loading.The grid G of described P-channel enhancement type metal-oxide-semiconductor Q1 is connected power input terminal by current-limiting resistance R1 on the one hand, perhaps directly connect described power input terminal; The positive pole that connects capacitor C 1 on the other hand, and the minus earth by capacitor C 1.Described charge/discharge control circuit is used for capacitor C 1 charge stored is released, the positive pole that connects described capacitor C 1, control end by charge/discharge control circuit receives power switch signal STBY_PWROFF, the power supply of power circuit output need be transferred to the rear end use electric loading the time, by exporting the path of releasing that effective power switch signal STBY_PWROFF control charge/discharge control circuit is communicated with electric charge, capacitor C 1 is slowly discharged, thereby control P-channel enhancement type metal-oxide-semiconductor Q1 slowly opens, when avoiding power supply VCC moment to open, the generation of the big electric current of transient state that causes owing to the influence of rear end capacitive load.
In the present embodiment, described charge/discharge control circuit preferably adopts bleeder resistance R3 to cooperate a switching circuit to set up and forms, with the switch ways one end ground connection of described switching circuit, other end series connection bleeder resistance R3, and connect the positive pole of described capacitor C 1 by bleeder resistance R3; The control end of switching circuit receives power switch signal STBY_PWROFF, under the control action of power switch signal STBY_PWROFF, is communicated with or cuts off the discharge loop of capacitor C 1, and then the break-make sequential of P-channel enhancement type metal-oxide-semiconductor Q1 is realized control.
For described switching circuit, the components and parts that can adopt transistor, field effect transistor, controllable silicon etc. to have on-off action carry out the specific design of switching circuit.Present embodiment is that example describes with NPN type triode Q2, referring to shown in Figure 1, with the collector electrode connection bleeder resistance R3 of NPN type triode Q2, and passes through the positive pole that bleeder resistance R3 connects capacitor C 1; With the grounded emitter of NPN type triode Q2, base stage receives described power switch signal STBY_PWROFF.
In the present embodiment, described power switch signal STBY_PWROFF can be provided by the output of the processor in the electronic product.For the electronic product with standby mode, in order to reach the purpose of design that reduces stand-by power consumption, can specifically adopt the standby in the electronic product to connect the base stage (being the control end of charge/discharge control circuit) of NPN type triode Q2 with microprocessor by current-limiting resistance R2, to realize the break-make control to NPN type triode Q2.Described standby namely is arranged in the electronic product with microprocessor, receive the standby command that key circuit or remote controller send when being used for being in standby mode in system, and then control system is changed over to the special-purpose small-power chip of operational mode by standby.By standby is incorporated into microprocessor in the design of circuit system, in the time of can entering standby mode in system, the power supply of primary processor in the cut-out system makes primary processor out of service, finishes the task of receiving standby command with microprocessor and change by standby.Because standby can select for use the minimum simple chip of power consumption to realize with microprocessor, thereby can significantly reduce the stand-by power consumption of system, the stand-by power consumption that satisfies electronic product is lower than the designing requirement of 1W, makes the stand-by power consumption of electronic product can meet national standard.
Operation principle below in conjunction with the power control circuit of the present embodiment of Fig. 1 is explained in detail.
When electronic product is in holding state, power circuit in the electronic product keeps running status, continues output power supply VCC, at this moment, by the power switch signal STBY_PWROFF of standby with the microprocessor output low level, control NPN type triode Q2 ends.At this moment, owing to be full of in the capacitor C 1, the grid voltage that makes P-channel enhancement type metal-oxide-semiconductor Q1 is high level, and equal the source voltage of P-channel enhancement type metal-oxide-semiconductor Q1, thereby make P-channel enhancement type metal-oxide-semiconductor Q1 be in cut-off state, cut off the transmission channel of power supply VCC, load outage in rear end is out of service, reaches the purpose of design that reduces the system standby power consumption.
When electronic product transferred the start running status to by standby, standby was controlled NPN type triode Q2 saturation conduction with the power switch signal STBY_PWROFF of microprocessor output high level, sets up capacitor C 1 discharge path over the ground.At this moment, the electric charge of preserving in the capacitor C 1 is released via the collector and emitter of NPN type triode Q2 over the ground by bleeder resistance R3, makes the grid voltage of P-channel enhancement type metal-oxide-semiconductor Q1 reduce gradually.In the process that capacitor C 1 is slowly discharged, when the difference of the source voltage of P-channel enhancement type metal-oxide-semiconductor Q1 and its grid voltage reaches the cut-in voltage of metal-oxide-semiconductor, P-channel enhancement type metal-oxide-semiconductor Q1 slowly opens, make the power supply VCC by power circuit output slowly transfer to the rear end load via source electrode and the drain electrode of P-channel enhancement type metal-oxide-semiconductor Q1, provide power supply VCC-1 for the rear end with electric loading.
Because P-channel enhancement type metal-oxide-semiconductor Q1 slowly opens; therefore; can avoid power supply VCC moment to open and the generation of the big electric current of transient state that causes; and then avoided the big electric current of transient state to the impact failure of posterior member device; effectively protect all loads of rear end, improved the electronic product reliability of operation.
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 the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also should belong to protection range of the present utility model.
Claims (10)
1. a band has delayed the power control circuit of control, it is characterized in that: the charge/discharge control circuit that is provided with P channel power pipe, electric capacity and is used for the electric charge of electric capacity is released; The source electrode of described P channel power pipe connects power input terminal, and drain electrode connects power output terminal, and grid connects electric capacity and links to each other with described power input terminal; The positive pole of described electric capacity connects charge/discharge control circuit, and the control end of described charge/discharge control circuit receives power switch signal.
2. band according to claim 1 has delayed the power control circuit of control, it is characterized in that: in described charge/discharge control circuit, be provided with a switching circuit, the switch ways of described switching circuit is connected between the positive pole and ground of electric capacity, and the control end of switching circuit receives described power switch signal.
3. band according to claim 2 has delayed the power control circuit of control, it is characterized in that: be in series with bleeder resistance in the switch ways of described switching circuit connects the circuit of positive pole of described electric capacity.
4. band according to claim 3 has delayed the power control circuit of control, it is characterized in that: in described switching circuit, be provided with a NPN type triode, the collector electrode of described NPN type triode connects the positive pole of described electric capacity by the bleeder resistance of series connection, the grounded emitter of NPN type triode, base stage receives described power switch signal.
5. band according to claim 1 has delayed the power control circuit of control, and it is characterized in that: the grid of described P channel power pipe connects described power input terminal by current-limiting resistance.
6. delayed the power control circuit of control according to each described band in the claim 1 to 5, it is characterized in that: the control end of described charge/discharge control circuit connects processor, the power switch signal of receiving processor output.
7. band according to claim 6 has delayed the power control circuit of control, it is characterized in that: described processor is the standby microprocessor, described standby receives standby signal with microprocessor, generates and export described power switch signal according to described standby signal.
8. delayed the power control circuit of control according to each described band in the claim 1 to 5, it is characterized in that: described P channel power pipe is the P-channel enhancement type metal-oxide-semiconductor.
9. an electronic product is characterized in that: the power control circuit that the internal circuit board of described electronic product is provided with power circuit, uses electric loading and delayed control as the described band of each claim in the claim 1 to 7; In described power control circuit, power input terminal connects described power circuit, receives the power supply of power circuit output; Power output terminal connects the described electric loading of using, to exporting power supply with electric loading.
10. electronic product according to claim 9 is characterized in that: have at least one to be capacitive load described in electric loading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320221188 CN203193589U (en) | 2013-04-27 | 2013-04-27 | Power source control circuit and electronic product with slow-start control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320221188 CN203193589U (en) | 2013-04-27 | 2013-04-27 | Power source control circuit and electronic product with slow-start control |
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| Publication Number | Publication Date |
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| CN203193589U true CN203193589U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320221188 Expired - Fee Related CN203193589U (en) | 2013-04-27 | 2013-04-27 | Power source control circuit and electronic product with slow-start control |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270000A (en) * | 2014-09-10 | 2015-01-07 | 深圳市易联技术有限公司 | Thermal printer power supply soft start system for POS machine |
| CN104779678A (en) * | 2015-04-29 | 2015-07-15 | 从兴技术有限公司 | Power management circuit |
| CN106339066A (en) * | 2016-11-15 | 2017-01-18 | 歌尔科技有限公司 | Power consumption control method, circuit and wearable electronic product |
| CN115220561A (en) * | 2022-09-05 | 2022-10-21 | 北京紫光芯能科技有限公司 | Load balancing circuit and system for multi-core SOC debugging |
| CN115377937A (en) * | 2022-10-24 | 2022-11-22 | 浙江富特科技股份有限公司 | Electronic fuse structure, power supply device comprising same and working method of power supply device |
-
2013
- 2013-04-27 CN CN 201320221188 patent/CN203193589U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270000A (en) * | 2014-09-10 | 2015-01-07 | 深圳市易联技术有限公司 | Thermal printer power supply soft start system for POS machine |
| CN104779678A (en) * | 2015-04-29 | 2015-07-15 | 从兴技术有限公司 | Power management circuit |
| CN106339066A (en) * | 2016-11-15 | 2017-01-18 | 歌尔科技有限公司 | Power consumption control method, circuit and wearable electronic product |
| CN106339066B (en) * | 2016-11-15 | 2023-10-20 | 歌尔科技有限公司 | Power consumption control method, circuit and wearable electronic product |
| CN115220561A (en) * | 2022-09-05 | 2022-10-21 | 北京紫光芯能科技有限公司 | Load balancing circuit and system for multi-core SOC debugging |
| CN115220561B (en) * | 2022-09-05 | 2022-12-27 | 北京紫光芯能科技有限公司 | Load balancing circuit and system for multi-core SOC debugging |
| CN115377937A (en) * | 2022-10-24 | 2022-11-22 | 浙江富特科技股份有限公司 | Electronic fuse structure, power supply device comprising same and working method of power supply device |
| CN115377937B (en) * | 2022-10-24 | 2023-03-24 | 浙江富特科技股份有限公司 | Electronic fuse structure, power supply device comprising same and working method of electronic fuse structure |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20190427 |