CN205015774U - Low -pressure end load switching circuit based on adjustable low -dropout regulator of negative pressure - Google Patents
Low -pressure end load switching circuit based on adjustable low -dropout regulator of negative pressure Download PDFInfo
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- CN205015774U CN205015774U CN201520767089.4U CN201520767089U CN205015774U CN 205015774 U CN205015774 U CN 205015774U CN 201520767089 U CN201520767089 U CN 201520767089U CN 205015774 U CN205015774 U CN 205015774U
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- control section
- stabiliser
- load system
- utility
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- 239000003381 stabilizer Substances 0.000 claims abstract description 21
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model provides a low -pressure end load switching circuit based on adjustable low -dropout regulator of negative pressure, it includes FB end control section, steady voltage sub circuit and load system, FB end control section is used for controlling the level height of FB end, the steady voltage sub circuit respectively with FB end control section with load system connects, and level height according to the FB end switches its on off state, the steady voltage sub circuit includes LT1185 type stabiliser U1, FB end control section includes controllable switch K1, high -low level warp controllable switch K1 inserts stabiliser U1's FB end, the input negative voltage is gone into to stabiliser U1's IN termination, stabiliser U1's REF end is through a grounding, stabiliser U1's OUT end is through load system ground connection. The utility model has the advantages of no electric strike sparks, have limited number of time life -span, no mechanical wear.
Description
Technical field
The utility model relates to low pressure end load switch technology, specifically, relate to a kind of low pressure end load switching circuit based on the adjustable low-dropout regulator of negative pressure.
Background technology
The dependence of modern life people to smart machine and network is more and more strong, and tracing it to its cause is nothing but that it is convenient for carrying and facilitates the required information of acquisition.But be that network or smart machine all need a large amount of electronics and electric components to support rearward, especially IC acts on significantly especially.Along with the development of semiconductor technology, more and more higher to the requirement of the power rail of IC, as: to power rail power up sequence, the speed etc. that powers on is proposed very concrete requirement.And mostly come by Electromechanical Control element before, as: relay and switch with mechanical contact etc., it seems now that these cannot be competent at, must have and just can take on suitable Power IC in controllability in speed, central particularly conventional with load switch again.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, provide a kind of circuit structure simple, without electrically striking sparks, the low pressure end load switching circuit based on the adjustable low-dropout regulator of negative pressure of mechanical wearing and tearing and long service life.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of low pressure end load switching circuit based on the adjustable low-dropout regulator of negative pressure, it comprises FB and holds control section, voltage stabilizing electronic circuit and load system, the level height that described FB holds control section to hold for control FB; Described voltage stabilizing electronic circuit holds control section and described load system to be connected respectively with described FB, according to the level height of FB end, switch its on off state; Described voltage stabilizing electronic circuit comprises LT1185 type voltage stabilizer U1, described FB holds control section to comprise gate-controlled switch K1, low and high level accesses the FB end of described voltage stabilizer U1 through described gate-controlled switch K1, the IN termination of described voltage stabilizer U1 enters to input negative voltage, the REF end of described voltage stabilizer U1 is by a resistance eutral grounding, and the OUT end of described voltage stabilizer U1 is through load system ground connection.
The utility model hinge structure has substantive distinguishing features and progress, specifically, the utility model adopts the adjustable low-dropout regulator of negative pressure as switch and controls one, the low and high level held by control FB is completed and switches on and off function to input voltage and load, thus the switching function of realizing circuit.The utility model has without the advantage of electrically striking sparks, wear and tear without limited number of time life-span, mechanical, has more economy, do not increase management compared with special load switch IC.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is circuit block diagram of the present utility model.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As depicted in figs. 1 and 2, a kind of low pressure end load switching circuit based on the adjustable low-dropout regulator of negative pressure, it comprises FB and holds control section, voltage stabilizing electronic circuit and load system, the level height that described FB holds control section to hold for control FB; Described voltage stabilizing electronic circuit holds control section and described load system to be connected respectively with described FB, according to the level height of FB end, switch its on off state; Described voltage stabilizing electronic circuit comprises LT1185 type voltage stabilizer U1, described FB holds control section to comprise gate-controlled switch K1, low and high level accesses the FB end of described voltage stabilizer U1 through described gate-controlled switch K1, the IN termination of described voltage stabilizer U1 enters to input negative voltage, the REF end of described voltage stabilizer U1 is by a resistance eutral grounding, and the OUT end of described voltage stabilizer U1 is through load system ground connection.
Controlled the input of low and high level of the FB end of described voltage stabilizer U1 in the utility model by described gate-controlled switch K1, can complete that function is switched on and off to input voltage and load system, thus the switching function of realizing circuit.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (1)
1. based on a low pressure end load switching circuit for the adjustable low-dropout regulator of negative pressure, it is characterized in that: it comprises FB and holds control section, voltage stabilizing electronic circuit and load system, the level height that described FB holds control section to hold for control FB; Described voltage stabilizing electronic circuit holds control section and described load system to be connected respectively with described FB, according to the level height of FB end, switch its on off state; Described voltage stabilizing electronic circuit comprises LT1185 type voltage stabilizer U1, described FB holds control section to comprise gate-controlled switch K1, low and high level accesses the FB end of described voltage stabilizer U1 through described gate-controlled switch K1, the IN termination of described voltage stabilizer U1 enters to input negative voltage, the REF end of described voltage stabilizer U1 is by a resistance eutral grounding, and the OUT end of described voltage stabilizer U1 is through load system ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520767089.4U CN205015774U (en) | 2015-09-30 | 2015-09-30 | Low -pressure end load switching circuit based on adjustable low -dropout regulator of negative pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520767089.4U CN205015774U (en) | 2015-09-30 | 2015-09-30 | Low -pressure end load switching circuit based on adjustable low -dropout regulator of negative pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205015774U true CN205015774U (en) | 2016-02-03 |
Family
ID=55214367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520767089.4U Expired - Fee Related CN205015774U (en) | 2015-09-30 | 2015-09-30 | Low -pressure end load switching circuit based on adjustable low -dropout regulator of negative pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205015774U (en) |
-
2015
- 2015-09-30 CN CN201520767089.4U patent/CN205015774U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160203 |