CN102778849B - Switching on and shutting down control circuit, electronic equipment and on-off control method - Google Patents
Switching on and shutting down control circuit, electronic equipment and on-off control method Download PDFInfo
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- CN102778849B CN102778849B CN201210273838.9A CN201210273838A CN102778849B CN 102778849 B CN102778849 B CN 102778849B CN 201210273838 A CN201210273838 A CN 201210273838A CN 102778849 B CN102778849 B CN 102778849B
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Abstract
The present invention discloses a kind of switching on and shutting down control circuit, for in the system comprising primary power and standby power, control primary power according to the mode of operation of standby power whether to work, it is characterized in that, comprise the control module be connected between described primary power and standby power, the test side of described control module is connected with the output terminal of described standby power operating voltage; Described control module detects the output power of standby power, judges the duty of standby power according to described output power, and controls signal to primary power accordingly to open or to close described primary power according to described duty output.Also disclose and a kind ofly use the electronic equipment of this switching on and shutting down control circuit and a kind of method for start-up and shutdown.Above-mentioned switching on and shutting down control circuit, electronic equipment and method for start-up and shutdown cost are lower.
Description
Technical field
The present invention relates to the Opportunity awaiting control for linear technology of electronic equipment, particularly relate to a kind of switching on and shutting down control circuit, a kind ofly use the electronic equipment of this switching on and shutting down control circuit and a kind of on-off control method.
Background technology
In many electronic equipments, all provide standby mode, therewith adaptably, the power-supply system of electronic equipment is equipped with primary power and standby (or system) power supply all simultaneously.As shown in Figure 1, be a kind of function structure chart of traditional power-supply system.This power-supply system comprises primary power 1 and standby power 2, and primary power 1 obtains through overcommutation and filtering by exchanging input respectively with the power supply of standby power 2.
Time under electronic equipment is in normal operating conditions, standby power 2 is in normal mode of operation, and it provides operating voltage for primary power 1, makes primary power 1 can be in running order, thus provides the required voltage that normally works for various load.Time under electronic equipment is in holding state, standby power 2 transfers standby mode to, and the operating voltage of primary power 1 is cut off by it, and only for the load of necessity provides required voltage.
Wherein the patten transformation of standby power 2 carries out automatically, and standby power 2 whether cut off for operating voltage that primary power 1 provides be carry out controlling to realize to control device (as shown in Figure 1, being generally an optocoupler) by external control signal.External control signal is usually from the control circuit on electronic equipment mainboard.
Therefore, need in traditional electronic equipment to design the operation circuit of mainboard to power-supply system, and need to set up the higher control device of the costs such as optocoupler, make the cost of whole electronic equipment relatively high.
Summary of the invention
Based on this, be necessary the switching on and shutting down control circuit that a kind of low cost is provided.
In addition, a kind of electronic equipment of low cost is also provided.
And, a kind of on-off control method of low cost.
A kind of switching on and shutting down control circuit, for in the system comprising primary power and standby power, control primary power according to the mode of operation of standby power whether to work, comprise the control module be connected between described primary power and standby power, the test side of described control module is connected with the output terminal of described standby power operating voltage; Described control module detects the output power of standby power, judges the duty of standby power according to described output power, and controls signal to primary power accordingly to open or to close described primary power according to described duty output.
Wherein in an embodiment, described control module:
Comprise the first resistance and the second resistance that are connected in series successively, one end that described first resistance is not connected with the second resistance as described test side, one end ground connection that described second resistance is not connected with the first resistance;
Also comprise the first electric capacity with described second resistor coupled in parallel;
Also comprise the first switching tube, the control end of described first switching tube is connected to the common port of described first resistance and the second resistance by the 3rd resistance, the input end of described first switching tube as the output terminal of described control module, the output head grounding of described first switching tube.
Wherein in an embodiment, described control module also comprises the first diode, and one end that negative electrode and described first resistance of described first diode are not connected with the second resistance connects, and the anode of described first diode is as described test side.
Wherein in an embodiment, described first switching tube is triode or field effect transistor.
Wherein in an embodiment, described control module:
Comprise the first resistance and the second resistance that are connected in series successively, one end that described first resistance is not connected with the second resistance as described test side, one end ground connection that described second resistance is not connected with the first resistance;
Also comprise the first electric capacity with described second resistor coupled in parallel;
Also comprise comparator device, an input end of described comparator device is connected to the common port of described first resistance and the second resistance by the 3rd resistance, another input end input reference voltage, and the output terminal of described comparator device is as the output terminal of whole control module.
Wherein in an embodiment, described comparator device is voltage comparator or operational amplifier.
Wherein in an embodiment, also comprise switch module, described switch module comprises the 4th resistance and second switch pipe, the input end of described second switch pipe is connected with the 4th resistance one end, the other end of described 4th resistance is as the input end of described switch module, the control end of described second switch pipe is connected with the output terminal of described control module as the control end of described switch module, and the output terminal of described second switch pipe is as the output terminal of described switch module.
Wherein in an embodiment, described switch module also comprises the second diode, and one end that negative electrode and described 4th resistance of described second diode are not connected with the second resistance connects, and the anode of described first diode is as described test side.
A kind of electronic equipment, comprises primary power, standby power and above-mentioned switching on and shutting down control circuit.
Whether a kind of on-off control method, in the system comprising primary power and standby power, control primary power according to the mode of operation of standby power and work, comprise the steps: the output power detecting described standby power; The duty of standby power is judged according to described output power; Duty according to described standby power outputs control signals to primary power, to open or to close described primary power.
The switching on and shutting down control circuit of above-described embodiment and method can judge residing mode of operation by the power detecting standby power, thus realize automatically opening or closing primary power.Use the electronic equipment of this switching on and shutting down control circuit not need design con-trol circuit and corresponding circuit, the cost of electronic equipment can be reduced.
Further, power detection and switch control rule can only use simple basic device just can realize, and therefore circuit structure is simple, and cost is lower.
Accompanying drawing explanation
Fig. 1 is a kind of function structure chart of traditional power-supply system;
Fig. 2 is the internal module structural drawing of electronic equipment preferred embodiment of the present invention;
Fig. 3 is the switching on and shutting down control circuit schematic diagram of an embodiment in electronic equipment of the present invention shown in Fig. 2;
Fig. 4 is the switching on and shutting down control circuit schematic diagram of another embodiment in electronic equipment of the present invention shown in Fig. 2.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
Whether the on-off control method of one embodiment, in the system comprising primary power and standby power, control primary power according to the mode of operation of standby power and work, comprise the steps.
S101: the output power detecting standby power.
S102: the duty judging standby power according to the output power of standby power.Standby power, under different mode of operations, has different output powers.The duty that standby power is current can be judged according to the power detected.
S103: the duty according to described standby power outputs control signals to primary power, to open or to close described primary power.
Said method, by detecting the output power of standby power, can the mode of operation of automatic discrimination standby power, and then control primary power and open or close.Do not need to utilize the additional circuit in electronic equipment on mainboard to provide control signal, can circuit design be simplified.
Based on said method, provide the switching on and shutting down control circuit of following various embodiment.
As shown in Figure 2, be the internal module structural drawing of electronic equipment preferred embodiment of the present invention.This electronic equipment comprises primary power 10 and standby power 20.Alternating current AC after overcommutation and filtering, be supplied to primary power 10 respectively and standby power 20 carries out voltage transformation and exports to different loads.Wherein primary power 10 output voltage is to system load, and standby power 20 is necessary voltage under providing electronic equipment holding state.The mode of operation of switching on and shutting down control circuit 30 residing for standby power 20 of the present embodiment controls standby power 20 output enable and controls signal to primary power 10, to realize automatically opening or closing primary power 10.
At electronic equipment during standby and normal work, standby power 20 is in two kinds of mode of operations respectively: standby mode and normal mode of operation.Under standby mode, standby power 20 only provides the power supply of necessary load to supply, and its power exported is less.In the electronic equipment using Switching Power Supply, showing as PWM(Pulse WidthModulation, pulse-length modulation) duty of signal is smaller, and the recurrence interval is operated in skip cycle mode.In the normal mode of operation, standby power 20 needs for primary power 10 provides operating voltage, and now the output power of standby power 20 is larger.In the electronic equipment using Switching Power Supply, the dutycycle showing as pwm signal is comparatively large, and the recurrence interval is operated in continuous mode.
Namely the switching on and shutting down control circuit 30 of the present embodiment detects the mode of operation residing for standby power 20 by the power detecting standby power 20 output, and then determines which kind of exports controls signal to primary power 10, thus opens or close primary power 10.
Particularly, as shown in Figure 3, switching on and shutting down control circuit 30 comprises control module 100 and peripheral devices.Composition graphs 2, the test side 101 of control module 100 is connected with the output terminal of standby power 20 operating voltage, and output terminal 102 outputs control signals to the control end of primary power 10.Usually, primary power 10 may adopt power management chip, and this control end can be the enable pin of power management chip.Control module 100 detects the output power of standby power 20, judges the duty of standby power 20 according to described output power, and controls signal to primary power 10 accordingly to open or to close described primary power according to described duty output.
In the present embodiment, control module 100 comprises the first diode D1, the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1 and the first switching tube Q1.
First diode D1, the first resistance R1 and the second resistance R2 are connected in series successively.Wherein the negative electrode of the first diode D1 is connected with the first resistance R1, anode is as test side 101; One end ground connection that second resistance R2 is not connected with the first resistance R1.
First electric capacity C1 is in parallel with the second resistance R2.
The control end of the first switching tube Q1 is connected to the common port of the first resistance R1 and the second resistance R2 by the 3rd resistance R3, the input end of the first switching tube Q1 is connected with the control end of primary power 10 as the output terminal 102 of control module 100, the output head grounding of the first switching tube Q1.In the present embodiment, the first switching tube Q1 adopts NPN type triode, wherein the base stage of this NPN type triode as the control end of the first switching tube Q1, collector as the input end of the first switching tube Q1, emitter as the output terminal of the first switching tube Q1.Be appreciated that control signal also can be exported by pull-up resistor R5 by the input end of the first switching tube Q1, also namely one end of not being connected with the input end of the first switching tube Q1 of pull-up resistor R5 as described output terminal 102.
In another embodiment, as shown in Figure 4, the basis of previous embodiment increases switch module 200.Switch module 200 comprises the second diode D2, the 4th resistance R4 and second switch pipe Q2.The input end of second switch pipe Q2 is connected with the 4th resistance R4, the second diode D2 successively, and wherein the negative electrode of the second diode D2 is connected with the 4th resistance R4, anode is as the input end 201 of switch module 200.The control end of second switch pipe Q2 is connected with the output terminal 102 of control module 100 as the control end 203 of switch module 200.The output terminal of second switch pipe Q2 is as the output terminal 202 of switch module 200.In the present embodiment, second switch pipe Q2 adopts PNP type triode, wherein the base stage of this PNP type triode as the control end of second switch pipe Q2, collector as the output terminal of second switch pipe Q2, emitter as the input end of second switch pipe Q2.
In a preferred embodiment, between the negative electrode of the second diode D2 and ground, and filter capacitor (not shown) can also be set up between the output terminal 202 of switch module 200 and ground.
The following concrete structure according to foregoing circuit, and composition graphs 2 and Fig. 4 illustrate switching on and shutting down control principle.
When electronic equipment is in normal mode of operation, the power that standby power 20 exports is larger, the voltage that first electric capacity C1 is formed is larger, it is enough to unlatching first switching tube Q1 makes its conducting, thus second switch pipe Q2 conducting, the operating voltage exported at standby voltage 20 can transfer to primary power 10, primary power 10 is opened and normal work.
When electronic equipment is in standby mode, the power that standby power 20 exports is less, and the voltage that the first electric capacity C1 is formed is less, it is not enough to unlatching first switching tube Q1 and makes its conducting, thus second switch pipe Q2 ends, then primary power 10 can not get operating voltage, cannot work.
The voltage swing that first electric capacity C1 is formed can also be determined by the ratio of the resistance of the first resistance R1 and the second resistance R2, by regulating the ratio of this resistance, control module 100 can be made correctly to detect the mode of operation of standby power 20.
Composition graphs 2 and Fig. 3, when not having switch module 200, the input end of the first switching tube Q1 is connected to the control end of primary power 10.Be appreciated that the change of the output power that the change of the duty of standby power 20 causes, cause the cut-off of the first switching tube Q1 or conducting consistent with above-described embodiment, namely the change in voltage of the first switching tube Q1 input end may be used for opening or closing primary power 10.
The switching on and shutting down control circuit of above-described embodiment only uses simple basic device just can realize automatically starting and cutting out primary power, and circuit structure is simple, and cost is lower.Meanwhile, use the electronic equipment of this switching on and shutting down control circuit also not need design con-trol circuit and corresponding circuit, also can reduce the cost of electronic equipment.
In above-described embodiment, the first diode D1 and the second diode D2 is counnter attack device, for preventing reverse direction current flow.In other embodiments, the first diode D1 and the second diode D2 also can omit.
In addition, the first switching tube Q1 also can use field effect transistor, voltage comparator or operational amplifier to replace.Wherein voltage comparator or operational amplifier will arrange corresponding reference voltage, to compare judgement.Second switch pipe Q2 also can use field effect transistor to replace.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a switching on and shutting down control circuit, for in the system comprising primary power and standby power, whether control primary power according to the mode of operation of standby power to work, in system standby with when normally working, standby power is in two kinds of mode of operations respectively: standby mode and normal mode of operation; Alternating current after overcommutation and filtering, be supplied to primary power respectively and standby power carries out voltage transformation and exports to different loads, wherein primary power output voltage is to system load, standby power is necessary voltage under providing electronic equipment holding state, it is characterized in that, comprise the control module be connected between described primary power and standby power, the test side of described control module is connected with the output terminal of described standby power operating voltage; Described control module detects the output power of standby power, judges the duty of standby power according to described output power, and controls signal to primary power accordingly to open or to close described primary power according to described duty output;
Described control module:
Comprise the first resistance and the second resistance that are connected in series successively, one end that described first resistance is not connected with the second resistance as described test side, one end ground connection that described second resistance is not connected with the first resistance;
Also comprise the first electric capacity with described second resistor coupled in parallel;
Also comprise the first switching tube, the control end of described first switching tube is connected to the common port of described first resistance and the second resistance by the 3rd resistance, the input end of described first switching tube as the output terminal of described control module, the output head grounding of described first switching tube;
Described control module also comprises the first diode, and one end that negative electrode and described first resistance of described first diode are not connected with the second resistance connects, and the anode of described first diode is as described test side.
2. switching on and shutting down control circuit according to claim 1, is characterized in that, described first switching tube is triode or field effect transistor.
3. switching on and shutting down control circuit according to claim 1, is characterized in that, described control module:
Comprise the first resistance and the second resistance that are connected in series successively, one end that described first resistance is not connected with the second resistance as described test side, one end ground connection that described second resistance is not connected with the first resistance;
Also comprise the first electric capacity with described second resistor coupled in parallel;
Also comprise comparator device, an input end of described comparator device is connected to the common port of described first resistance and the second resistance by the 3rd resistance, another input end input reference voltage, and the output terminal of described comparator device is as the output terminal of whole control module.
4. switching on and shutting down control circuit according to claim 3, is characterized in that, described comparator device is voltage comparator or operational amplifier.
5. switching on and shutting down control circuit according to claim 1, it is characterized in that, also comprise switch module, described switch module comprises the 4th resistance and second switch pipe, the input end of described second switch pipe is connected with the 4th resistance one end, the other end of described 4th resistance is as the input end of described switch module, the control end of described second switch pipe is connected with the output terminal of described control module as the control end of described switch module, and the output terminal of described second switch pipe outputs control signals to primary power.
6. switching on and shutting down control circuit according to claim 5, it is characterized in that, described switch module also comprises the second diode, and one end that negative electrode and described 4th resistance of described second diode are not connected with second switch pipe connects, and the anode of described first diode is as described test side.
7. an electronic equipment, is characterized in that, comprises primary power, standby power and the switching on and shutting down control circuit as described in any one of claim 1 ~ 6.
8. an on-off control method, for in the system comprising primary power and standby power, whether control primary power according to the mode of operation of standby power to work, in system standby with when normally working, standby power is in two kinds of mode of operations respectively: standby mode and normal mode of operation; Alternating current after overcommutation and filtering, be supplied to primary power respectively and standby power carries out voltage transformation and exports to different loads, wherein primary power output voltage is to system load, standby power is necessary voltage under providing electronic equipment holding state, comprises the steps:
Detect the output power of described standby power;
The duty of standby power is judged according to described output power;
Duty according to described standby power outputs control signals to primary power, to open or to close described primary power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210273838.9A CN102778849B (en) | 2012-08-01 | 2012-08-01 | Switching on and shutting down control circuit, electronic equipment and on-off control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210273838.9A CN102778849B (en) | 2012-08-01 | 2012-08-01 | Switching on and shutting down control circuit, electronic equipment and on-off control method |
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| CN102778849A CN102778849A (en) | 2012-11-14 |
| CN102778849B true CN102778849B (en) | 2015-10-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676746B (en) * | 2013-12-20 | 2016-08-17 | 青岛歌尔声学科技有限公司 | A kind of switching on and shutting down control circuit and electronic equipment |
| 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 |
| CN104135691B (en) * | 2014-08-14 | 2017-12-22 | 广州创维平面显示科技有限公司 | MCU reset control circuits and television set |
| CN104898476B (en) * | 2015-04-07 | 2017-10-03 | 海能达通信股份有限公司 | A kind of switching on and shutting down control circuit and the electronic equipment with the circuit |
| CN105093993B (en) * | 2015-09-25 | 2017-11-28 | 联想(北京)有限公司 | Electronic equipment and its control method |
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| US5585677A (en) * | 1993-12-30 | 1996-12-17 | Samsung Electronics Co., Ltd. | Backup power-supply system for emergency |
| CN202067104U (en) * | 2011-03-14 | 2011-12-07 | 广州视源电子科技有限公司 | Circuit allowing rapid switchover from stand by to starting up |
| CN102377233A (en) * | 2010-08-04 | 2012-03-14 | 康舒科技股份有限公司 | Power supply device capable of automatically switching standby power supply path |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358217C (en) * | 2003-12-11 | 2007-12-26 | 上海贝尔阿尔卡特股份有限公司 | Switching circuit for low voltage power supply in master-slave power supply mode |
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2012
- 2012-08-01 CN CN201210273838.9A patent/CN102778849B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5585677A (en) * | 1993-12-30 | 1996-12-17 | Samsung Electronics Co., Ltd. | Backup power-supply system for emergency |
| CN102377233A (en) * | 2010-08-04 | 2012-03-14 | 康舒科技股份有限公司 | Power supply device capable of automatically switching standby power supply path |
| CN202067104U (en) * | 2011-03-14 | 2011-12-07 | 广州视源电子科技有限公司 | Circuit allowing rapid switchover from stand by to starting up |
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Address after: 516006 community 37, Zhongkai high tech Zone, Huizhou, Guangdong Patentee after: Tongli Technology Co.,Ltd. Address before: 516006 Guangdong province Huizhou Zhongkai hi tech Development Zone No. 19 district Patentee before: TONLY ELECTRONICS HOLDINGS Ltd. |