CN103809649A - Control circuit capable of achieving sequential control over output voltage - Google Patents
Control circuit capable of achieving sequential control over output voltage Download PDFInfo
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- CN103809649A CN103809649A CN201210441108.5A CN201210441108A CN103809649A CN 103809649 A CN103809649 A CN 103809649A CN 201210441108 A CN201210441108 A CN 201210441108A CN 103809649 A CN103809649 A CN 103809649A
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Abstract
The invention provides a control circuit capable of achieving sequential control over output voltage. The control circuit comprises a MOS transistor and an audion used for driving the MOS transistor. A base electrode of the audion is connected with a control signal input end. Control signals and utilization voltage of a power utilization device are the same in timing sequence. The driving end of the audion is connected with a grid electrode of the MOS transistor. One end of the source electrode of the MOS transistor and one end of the drain electrode of the MOS transistor are connected with the input end of an external power source, and the other end of the source electrode of the MOS transistor and the other end of the drain electrode of the MOS transistor are connected with the output end of the power utilization device. The control circuit is capable of controlling supply voltage to be output to the power utilization device and not to be output to the power utilization device when the power utilization device does not consume power, thereby reducing circuit power consumption and improving the safety of the power utilization device and the external power source.
Description
Technical field
The present invention relates to circuit design technique field, particularly a kind of control circuit of realizing output voltage sequential control.
Background technology
At present, in the performance history of the electrical equipment such as mobile phone or computer, conventionally adopt PCB cabling directly to connect external power source and consumer, when this design is not worked at consumer, the output of external power source also can not cut off completely, has increased the consumption of circuit.Meanwhile, because external power source is always in power supply state, increased the risk that consumer short circuit, power supply damage.
Summary of the invention
The present invention is intended at least solve the technical matters existing in prior art, has proposed to special innovation a kind of control circuit of realizing output voltage sequential control.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of control circuit of realizing output voltage sequential control, comprise a metal-oxide-semiconductor and for driving the triode of described metal-oxide-semiconductor, the base stage of described triode is connected with control signal input end, the sequential of described control signal is identical with the utilization voltage sequential of consumer, the drive end of described triode is connected with the grid of described metal-oxide-semiconductor, the source electrode of described metal-oxide-semiconductor is connected with external power source input end with one end of drain electrode, and the other end is connected with consumer output terminal.
Control circuit of the present invention can be controlled the voltage of power supply to the output of consumer, in the time of not electricity consumption of consumer not to consumer output voltage, thereby reduce circuit power consumption, the security that has improved consumer and external power source.
In a preferred embodiment of the present invention, described control circuit also comprises the first resistance between base stage and the described control signal input end that is connected to described triode, is connected to the second resistance between base stage and the ground of described triode.In another kind of preferred embodiment of the present invention, described control circuit also comprises the first electric capacity between base stage and the ground that connects described triode.The present invention is connected the first resistance between the base stage of triode and control signal input end, between the base stage of triode and ground, be connected the second resistance, the first resistance and the second resistance are realized dividing potential drop effect, thereby control conducting and the cut-off of triode by the level height of control signal.Between the base stage of triode and ground, be also connected the first electric capacity, the first resistance and the first electric capacity play the effect of time delay, prevent control signal maloperation.
In a preferred embodiment of the present invention, described control circuit also comprises the second electric capacity, the 3rd electric capacity and the 3rd resistance, described the second electric capacity and the 3rd Capacitance parallel connection are between described external power source input end and ground, and described the 3rd resistance is connected between external power source input end and the grid of metal-oxide-semiconductor.
In another kind of preferred embodiment of the present invention, described control circuit also comprises four electric capacity in parallel with described the 3rd resistance two ends.
The present invention is the second electric capacity in parallel and the 3rd electric capacity between outside power input and ground, and the voltage of input is carried out to filtering, guarantees the stable of input voltage.The 3rd resistance that is connected in parallel between external power source input end and the grid of metal-oxide-semiconductor, plays the effect of drawing, the 4th electric capacity in parallel at the 3rd resistance two ends, the overshoot while preventing external power source input voltage.
In a preferred embodiment of the present invention, described control circuit also comprises the 5th resistance being connected between the drive end of described triode and the grid of described metal-oxide-semiconductor.
The present invention is connected the 5th resistance between the drive end of triode and the grid of metal-oxide-semiconductor, controls metal-oxide-semiconductor grid current and is unlikely to excessive, prevents that metal-oxide-semiconductor from misleading.
In another kind of preferred embodiment of the present invention, described control circuit also comprises the 5th electric capacity and the 6th electric capacity that are connected in parallel between described consumer output terminal and ground.The present invention carries out filtering by the 5th electric capacity and the 6th electric capacity to output voltage, guarantees that the power supply of external unit acquisition is stable, pure.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 is the circuit diagram of realizing the control circuit of output voltage sequential control in the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " longitudinally ", " laterally ", " on ", orientation or the position relationship of the indication such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The invention provides a kind of control circuit of realizing output voltage sequential control, as shown in Figure 1, this control circuit comprises a metal-oxide-semiconductor Q2 and for driving the triode Q1 of this metal-oxide-semiconductor Q2, the base stage of this triode Q1 is connected with control signal input end GPION_EN, the sequential of control signal of control signal input end GPION_EN input is identical with the utilization voltage sequential of consumer, the drive end of triode Q1 is connected with the grid of metal-oxide-semiconductor Q2, the source electrode of metal-oxide-semiconductor Q2 is connected with external power source input end VIN with one end of drain electrode, the other end is connected with consumer output terminal VOUT.
In the present embodiment, triode Q1 can be NPN type triode, can be also positive-negative-positive triode.In the time that triode Q1 is NPN type triode, the grounded emitter of triode Q1, the collector of triode Q1 is connected with the grid of metal-oxide-semiconductor Q2 as drive end.In the time that triode Q1 is positive-negative-positive triode, the grounded collector of triode Q1, the emitter of triode Q1 is connected with the grid of metal-oxide-semiconductor Q2 as drive end.
In the present embodiment, metal-oxide-semiconductor Q2 can be NMOS pipe, can be also PMOS pipe, and the source electrode of metal-oxide-semiconductor Q2 and drain electrode can be in full accord, adopt symmetric design, also can adopt asymmetric design.In the time adopting the identical metal-oxide-semiconductor Q2 of the design of source electrode and drain electrode, arbitrary end of the source electrode of metal-oxide-semiconductor Q2 and drain electrode is connected with external power source input end VIN, and the other end is connected with consumer output terminal VOUT.In the time adopting the different metal-oxide-semiconductor Q2 of the design of source electrode and drain electrode, if NMOS pipe, the source electrode of metal-oxide-semiconductor Q2 is connected with external power source input end VIN, drains and is connected with consumer output terminal VOUT; If PMOS pipe, the drain electrode of metal-oxide-semiconductor Q2 is connected with external power source input end VIN, and source electrode is connected with consumer output terminal VOUT.
As shown in Figure 1, between the base stage of triode Q1 and control signal input end GPION_EN, be connected with the first resistance R 1, between the base stage of triode Q1 and ground, be connected with the second resistance R 2, between the base stage of triode Q1 and ground, be also connected with the first capacitor C 1.This first resistance R 1 and the second resistance R 2 realize dividing potential drop effect, thereby make control signal pass through conducting and the cut-off of the height control triode of level.The first resistance R 1 and the first capacitor C 1 play the effect of time delay, prevent control signal maloperation.The resistance of the resistance of the first resistance R 1 and the second resistance R 2 can be adjusted according to the conduction voltage drop of triode Q1, and in the present embodiment, the resistance of the first resistance R 1 of selecting is 10k Ω, and the resistance of the second resistance R 2 is 100k Ω.
As shown in Figure 1, between external power source input end VIN and ground, be parallel with the second capacitor C 2 and the 3rd capacitor C 3, between external power source input end VIN and the grid of metal-oxide-semiconductor Q2, be connected with the 3rd resistance R 3, be parallel with the 4th capacitor C 4 at the 3rd resistance R 3 two ends.This second capacitor C 2 and the 3rd capacitor C 3 are carried out filtering to the voltage of outside power input VIN input, guarantee the stable, pure of input voltage, the 3rd resistance R 3 plays the effect of drawing, the overshoot that the 3rd resistance R 3 and the 4th capacitor C 4 produce when preventing external power source input end VIN input voltage.
Between the drive end of triode Q1 and the grid of metal-oxide-semiconductor Q2, be connected with the 5th resistance R 5, be unlikely to excessive for controlling the grid current of metal-oxide-semiconductor Q2, the grid potential of metal-oxide-semiconductor Q2 is dragged down, prevent that metal-oxide-semiconductor Q2 from misleading.Between consumer output terminal VOUT and ground, be connected in parallel to the 5th capacitor C 5 and the 6th capacitor C 6, for output voltage is carried out to filtering, guarantee that the power supply of external unit acquisition is stable, pure.
While utilizing control circuit of the present invention to carry out sequential control to output voltage, in the time that the control signal of control signal input end GPION_EN input is high level, triode Q1 conducting, the grid of metal-oxide-semiconductor Q2 is injected into voltage, metal-oxide-semiconductor Q2 conducting, the voltage of consumer output terminal VOUT is identical with the magnitude of voltage of external power source input end VIN.In the time that the control signal of control signal input end GPION_EN input is low level, triode Q1 cut-off, metal-oxide-semiconductor Q2 also ends, and the magnitude of voltage of consumer output terminal VOUT is zero.External power source input end VIN of the present invention is as power supply, its voltage can exist always, and the voltage of consumer output terminal VOUT is not to exist always, only in the time that the control signal of control signal input end GPION_EN input is high level, consumer output terminal VOUT just has Voltage-output, and its magnitude of voltage equals the magnitude of voltage of external power source input end VIN, can realize by controlling the conversion of control signal low and high level like this sequential control of the output voltage to consumer output terminal VOUT.
The present invention is applied in electronics and electric-control system, has the voltage turn-on of sequential requirement or the circuit of cut-off as control.Control circuit of the present invention can be controlled the output of supply voltage to consumer, in the time of consumer electricity consumption, makes power supply normal power supply, in the time of not electricity consumption of consumer, cuts off the electricity supply, and makes power supply not to consumer output voltage, thereby reduces circuit power consumption; Can prevent the damage to consumer in the time of external power source maloperation, play the effect of protection external unit, improved consumer security simultaneously.
As shown in Figure 1, between the source electrode of metal-oxide-semiconductor Q2 and drain electrode, can also connect the 4th resistance R 4, in the time not needing output voltage to control, metal-oxide-semiconductor Q2 and triode Q1 do not power on, now the 4th resistance R 4 connects the resistance that resistance is 0 Ω, or the source electrode of metal-oxide-semiconductor Q2 and drain electrode are directly connected.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (7)
1. realize the control circuit of output voltage sequential control for one kind, it is characterized in that, comprise a metal-oxide-semiconductor and for driving the triode of described metal-oxide-semiconductor, the base stage of described triode is connected with control signal input end, the sequential of described control signal is identical with the utilization voltage sequential of consumer, the drive end of described triode is connected with the grid of described metal-oxide-semiconductor, and the source electrode of described metal-oxide-semiconductor is connected with external power source input end with one end of drain electrode, and the other end is connected with consumer output terminal.
2. the control circuit of realizing output voltage sequential control as claimed in claim 1, it is characterized in that, described control circuit also comprises the first resistance between base stage and the described control signal input end that is connected to described triode, is connected to the second resistance between base stage and the ground of described triode.
3. the control circuit of realizing output voltage sequential control as claimed in claim 2, is characterized in that, described control circuit also comprises the first electric capacity between base stage and the ground that connects described triode.
4. the control circuit of realizing output voltage sequential control as claimed in claim 1, it is characterized in that, described control circuit also comprises the second electric capacity, the 3rd electric capacity and the 3rd resistance, described the second electric capacity and the 3rd Capacitance parallel connection are between described external power source input end and ground, and described the 3rd resistance is connected between external power source input end and the grid of metal-oxide-semiconductor.
5. the control circuit of realizing output voltage sequential control as claimed in claim 4, is characterized in that, described control circuit also comprises four electric capacity in parallel with described the 3rd resistance two ends.
6. the control circuit of realizing output voltage sequential control as claimed in claim 1, is characterized in that, described control circuit also comprises the 5th resistance being connected between the drive end of described triode and the grid of described metal-oxide-semiconductor.
7. the control circuit of realizing output voltage sequential control as claimed in claim 1, is characterized in that, described control circuit also comprises the 5th electric capacity and the 6th electric capacity that are connected in parallel between described consumer output terminal and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210441108.5A CN103809649A (en) | 2012-11-07 | 2012-11-07 | Control circuit capable of achieving sequential control over output voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210441108.5A CN103809649A (en) | 2012-11-07 | 2012-11-07 | Control circuit capable of achieving sequential control over output voltage |
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| CN103809649A true CN103809649A (en) | 2014-05-21 |
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| CN201210441108.5A Pending CN103809649A (en) | 2012-11-07 | 2012-11-07 | Control circuit capable of achieving sequential control over output voltage |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068596A (en) * | 2015-08-05 | 2015-11-18 | 广东欧珀移动通信有限公司 | Power on sequence adjusting circuit |
| CN109391188A (en) * | 2018-10-18 | 2019-02-26 | 深圳市优必选科技有限公司 | It is a kind of for reducing the control circuit and device of direct current generator power spikes |
| CN110071635A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of power on-off control circuit |
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| CN200983156Y (en) * | 2006-12-15 | 2007-11-28 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit |
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| CN102025354A (en) * | 2009-09-23 | 2011-04-20 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit |
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Patent Citations (7)
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| JP2008097535A (en) * | 2006-10-16 | 2008-04-24 | Matsushita Electric Works Ltd | Two-wire switching device |
| CN200965775Y (en) * | 2006-10-22 | 2007-10-24 | 青岛海信电器股份有限公司 | Voltage rising waveform controllable circuit and LCD TV |
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| CN201222720Y (en) * | 2008-07-08 | 2009-04-15 | 深圳市同洲电子股份有限公司 | Control circuit for electrification sequence |
| CN102025354A (en) * | 2009-09-23 | 2011-04-20 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068596A (en) * | 2015-08-05 | 2015-11-18 | 广东欧珀移动通信有限公司 | Power on sequence adjusting circuit |
| CN110071635A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of power on-off control circuit |
| CN109391188A (en) * | 2018-10-18 | 2019-02-26 | 深圳市优必选科技有限公司 | It is a kind of for reducing the control circuit and device of direct current generator power spikes |
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Application publication date: 20140521 |