CN209642549U - A kind of high-current dc power supply switching circuit - Google Patents
A kind of high-current dc power supply switching circuit Download PDFInfo
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- CN209642549U CN209642549U CN201920570157.6U CN201920570157U CN209642549U CN 209642549 U CN209642549 U CN 209642549U CN 201920570157 U CN201920570157 U CN 201920570157U CN 209642549 U CN209642549 U CN 209642549U
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- 239000003990 capacitor Substances 0.000 claims abstract description 39
- 239000004065 semiconductor Substances 0.000 claims abstract description 34
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- 210000004899 c-terminal region Anatomy 0.000 description 1
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Abstract
The utility model embodiment provides a kind of high-current dc power supply switching circuit, including triode and metal-oxide-semiconductor, and the collector of the triode connects the source electrode of the metal-oxide-semiconductor, and the base stage of the triode connects power supply output control terminal；It is connected with the 4th resistance R4 and 3rd resistor R3 between the collector and the source electrode in turn, the 3rd resistor R3 is parallel with first capacitor C1；Tie point of the first capacitor between the 3rd resistor R3 and the 4th resistance R4 also passes through the drain electrode that third capacitor C3 is connected to metal-oxide-semiconductor；The source electrode and drain electrode of the metal-oxide-semiconductor is separately connected 24V DC supply input and 24V DC power output end, pass through the size of setting resistance, capacitor, it causes cell voltage appearance substantially to fall when avoiding equipment starting, influence other equipment normal work and battery life, realization is actuated for accurately controlling to each equipment.
Description
Technical field
The utility model embodiment is related to switching circuit technical field more particularly to a kind of high-current dc power supply switch electricity
Road.
Background technique
In recent years, mobile terminal has become essential terminal device in people's daily life, and people are to mobile whole
The application of most of function is held to require to realize by mobile terminal.Vehicle-mounted monitoring system has numerous external electromechanical equipments,
Such as hard disk, camera, video recorder, heater, display screen, these equipment successively follow closely, or start simultaneously, to cause larger
Starting current.The curent change range of some hardware module circuits of mobile terminal is larger, therefore usually requires in hardware mould
The input terminal of block adds bulky capacitor to meet the dynamic response of hardware module electric current, and still, the increase of bulky capacitor often will cause
Hardware module and capacitor can generate very big operating current in the moment that external electromechanical equipment is opened, and cause hardware module leading portion electric
The output voltage in source reduces, and influences the normal work for other circuit modules being connected with the power supply.
However automobile storage battery capacity is limited, causes cell voltage appearance substantially to fall when starting in order to avoid equipment, shadow
Other equipment normal work and battery life are rung, needs that each equipment is actuated for accurately controlling.
Utility model content
The utility model embodiment provides a kind of high-current dc power supply switching circuit, causes electricity when avoiding equipment starting
Cell voltage appearance is substantially fallen, influences other equipment normal work and battery life, and realization is actuated for essence to each equipment
Really control.
The utility model embodiment provides a kind of high-current dc power supply switching circuit, including triode and metal-oxide-semiconductor, described
The collector of triode connects the source electrode of the metal-oxide-semiconductor, and the base stage of the triode connects power supply output control terminal；
It is connected with the 4th resistance R4 and 3rd resistor R3, the 3rd resistor R3 between the collector and the source electrode in turn
It is parallel with first capacitor C1；Tie point of the first capacitor C1 between the 3rd resistor R3 and the 4th resistance R4 is also logical
Cross the drain electrode that third capacitor C3 is connected to metal-oxide-semiconductor；The source electrode and drain electrode of the metal-oxide-semiconductor is separately connected 24V DC supply input
With 24V DC power output end.
Preferably, first resistor R1 is connected between the base stage and power supply output control terminal, the first resistor R1
It is grounded between base stage by second resistance R2；The emitter of the triode is grounded.
Preferably, the grid of the metal-oxide-semiconductor is grounded by the second capacitor C2, the second capacitor C2 is additionally coupled to institute
It states between first capacitor C1 and the third capacitor C3.
Preferably, the 24V DC power output end is also parallel with external ground capacity.
A kind of high-current dc power supply switching circuit provided by the embodiment of the utility model, including triode and metal-oxide-semiconductor, institute
The collector for stating triode connects the source electrode of the metal-oxide-semiconductor, and the base stage of the triode connects power supply output control terminal；The collection
It is connected with the 4th resistance R4 and 3rd resistor R3 between electrode and the source electrode in turn, the 3rd resistor R3 is parallel with first capacitor
C1；Tie point of the first capacitor between the 3rd resistor R3 and the 4th resistance R4 also passes through third capacitor C3 and connects
To the drain electrode of metal-oxide-semiconductor；The source electrode and drain electrode of the metal-oxide-semiconductor is separately connected 24V DC supply input and the output of 24V DC power supply
End, by the size of setting resistance, capacitor, when so that metal-oxide-semiconductor disconnecting, pressure difference (input voltage) is less than Vds between the pole D and the pole S,
When triode ON, the pressure difference between the pole G and the pole S has to be larger than Vgsth, and big as far as possible, but the pressure resistance being less than between GS
Value；It causes cell voltage appearance substantially to fall when avoiding equipment starting, influence other equipment normal work and battery life, it is real
Now each equipment is actuated for accurately controlling.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the high-current dc power supply switching circuit structure schematic diagram of the utility model embodiment.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
The curent change range of some hardware module circuits of mobile terminal is larger, therefore usually requires in hardware module
Input terminal adds bulky capacitor to meet the dynamic response of hardware module electric current, and still, the increase of bulky capacitor often will cause hardware
Module and capacitor can generate very big operating current in the moment that external electromechanical equipment is opened, and lead to hardware module leading portion power supply
Output voltage reduces, and influences the normal work for other circuit modules being connected with the power supply.However automobile storage battery capacity is limited,
In order to avoid causing cell voltage appearance substantially to fall when equipment starting, influencing other equipment normal work and battery life, need
Each equipment is actuated for accurately controlling.Therefore, the utility model embodiment provides a kind of high-current dc power supply and opens
Powered-down road causes cell voltage appearance substantially to fall, influences other equipment normal work and battery longevity when avoiding equipment starting
Life, realization are actuated for accurately controlling to each equipment.Expansion explanation and introduction will be carried out by multiple embodiments below.
Fig. 1 is according to a kind of high-current dc power supply switching circuit provided by the embodiment of the utility model, including triode
And metal-oxide-semiconductor, the collector (C-terminal in figure) of the triode connect the source electrode of the metal-oxide-semiconductor, the base stage of the triode (B in figure
End) connection power supply output control terminal；
It is connected with the 4th resistance R4 and 3rd resistor R3, the 3rd resistor R3 between the collector and the source electrode in turn
It is parallel with first capacitor C1；Tie point of the first capacitor between the 3rd resistor R3 and the 4th resistance R4 also passes through
Third capacitor C3 is connected to the drain electrode of metal-oxide-semiconductor；The source electrode and drain electrode of the metal-oxide-semiconductor be separately connected 24V DC supply input and
24V DC power output end.
In the present embodiment and following embodiment, emitter, base stage and the collector of triode are expressed as in Fig. 1 respectively
The pole E, the pole B and the pole C；Grid, drain electrode and the source electrode of metal-oxide-semiconductor are expressed as the pole G, the pole D and the pole S in Fig. 1 respectively.
In the present embodiment, as shown in fig. 1, previously according to the control signal of the power supply output control terminal output of equipment
POWER_CTL level, input voltage carry out selection, the setting of resistance, capacitor and triode, according to input voltage, load current
Metal-oxide-semiconductor is selected, the key parameters such as including Vds, Vgsth, Rdson, when so that metal-oxide-semiconductor disconnecting, pressure difference (is inputted between the pole D and the pole S
Voltage) it is less than Vds, when triode ON, the pressure difference between the pole G and the pole S is greater than Vgsth, and big as far as possible；Load current *
Rdson+MOS switching loss is less than the maximum power dissipation (P that metal-oxide-semiconductor allowsD), but the pressure voltage being less than between GS.
Specifically, in the present embodiment, metal-oxide-semiconductor Vgsth selects R3, R4；According to load current, starting current index, choosing
Select C1, C2, C3 (can partially use).
On the basis of the above embodiments, as a preferred embodiment, the base stage and power supply output control terminal
Between be connected with first resistor R1, be grounded between the first resistor R1 and base stage by second resistance R2；The transmitting of the triode
Pole ground connection.
On the basis of the above embodiments, as a preferred embodiment, the grid of the metal-oxide-semiconductor passes through the second electricity
Hold C2 ground connection, the second capacitor C2 is additionally coupled between the first capacitor C1 and the third capacitor C3.
On the basis of the above embodiments, as a preferred embodiment, the 24V DC power output end also simultaneously
It is associated with external ground capacity.
A kind of high-current dc power supply switching circuit provided by the embodiment of the utility model, including triode and metal-oxide-semiconductor, institute
The collector for stating triode connects the source electrode of the metal-oxide-semiconductor, and the base stage of the triode connects power supply output control terminal；The collection
It is connected with the 4th resistance R4 and 3rd resistor R3 between electrode and the source electrode in turn, the 3rd resistor R3 is parallel with first capacitor
C1；Tie point of the first capacitor between the 3rd resistor R3 and the 4th resistance R4 also passes through third capacitor C3 and connects
To the drain electrode of metal-oxide-semiconductor；The source electrode and drain electrode of the metal-oxide-semiconductor is separately connected 24V DC supply input and the output of 24V DC power supply
End, by the size of setting resistance, capacitor, when so that metal-oxide-semiconductor disconnecting, pressure difference (input voltage) is less than Vds between the pole D and the pole S,
When triode ON, the pressure difference between the pole G and the pole S has to be larger than Vgsth, and big as far as possible, but the pressure resistance being less than between GS
Value；It causes cell voltage appearance substantially to fall when avoiding equipment starting, influence other equipment normal work and battery life, it is real
Now each equipment is actuated for accurately controlling.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (4)
1. a kind of high-current dc power supply switching circuit, which is characterized in that including triode and metal-oxide-semiconductor, the collection of the triode
Electrode connects the source electrode of the metal-oxide-semiconductor, and the base stage of the triode connects power supply output control terminal；
It is connected with the 4th resistance R4 and 3rd resistor R3 between the collector and the source electrode in turn, the 3rd resistor R3 is in parallel
There is first capacitor C1；Tie point of the first capacitor C1 between the 3rd resistor R3 and the 4th resistance R4 also passes through
Three capacitor C3 are connected to the drain electrode of metal-oxide-semiconductor；The source electrode and drain electrode of the metal-oxide-semiconductor is separately connected 24V DC supply input and 24V
DC power output end.
2. high-current dc power supply switching circuit according to claim 1, which is characterized in that the base stage and power supply export
It is connected with first resistor R1 between control terminal, is grounded between the first resistor R1 and base stage by second resistance R2；The triode
Emitter ground connection.
3. high-current dc power supply switching circuit according to claim 1, which is characterized in that the grid of the metal-oxide-semiconductor is logical
The second capacitor C2 ground connection is crossed, the second capacitor C2 is additionally coupled between the first capacitor C1 and the third capacitor C3.
4. high-current dc power supply switching circuit according to claim 1, which is characterized in that the 24V DC power supply is defeated
Outlet is also parallel with external ground capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920570157.6U CN209642549U (en) | 2019-04-24 | 2019-04-24 | A kind of high-current dc power supply switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920570157.6U CN209642549U (en) | 2019-04-24 | 2019-04-24 | A kind of high-current dc power supply switching circuit |
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| CN209642549U true CN209642549U (en) | 2019-11-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917297A (en) * | 2020-09-02 | 2020-11-10 | 深圳市科力晟通科技有限公司 | Copper ion disinfection power supply circuit |
-
2019
- 2019-04-24 CN CN201920570157.6U patent/CN209642549U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917297A (en) * | 2020-09-02 | 2020-11-10 | 深圳市科力晟通科技有限公司 | Copper ion disinfection power supply circuit |
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