CN209545957U - A kind of LED power control circuit - Google Patents
A kind of LED power control circuit Download PDFInfo
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- CN209545957U CN209545957U CN201822174411.9U CN201822174411U CN209545957U CN 209545957 U CN209545957 U CN 209545957U CN 201822174411 U CN201822174411 U CN 201822174411U CN 209545957 U CN209545957 U CN 209545957U
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Abstract
The utility model discloses a kind of LED power control circuits, including amplifying circuit, field-effect tube Q1, resistance R1, R2, R3, R4, capacitor C1, one end of resistance R1 and the signal output end of amplifying circuit connect, the other end is connect with one end of resistance R2, the other end of resistance R2 is connect with voltage signal output end, the grid source of field-effect tube Q1 is connect with the points of common connection of resistance R1 and the signal output end of amplifying circuit, one end of resistance R3 is connect with the end power supply VCC, the other end is connect with the source electrode of field-effect tube Q1, the drain electrode of field-effect tube Q1 is connect with one end of resistance R4, the other end of resistance R4 is connect with voltage signal output end, one end of capacitor C1 is connect with the signal output end points of common connection of resistance R1 and amplifying circuit, the other end is connect with signal output end；Above-mentioned control circuit reduces the operating voltage in entire circuit, component stops working, and effectively reduces the power consumption in circuit by being equipped with for amplifying circuit and field-effect tube Q1.
Description
Technical field
The utility model relates to LED power field of circuit technology, specially a kind of LED power control circuit.
Background technique
With the development of intelligent control technology, intelligent control chip all joined in the power driving circuit of LED, to control
LED lamp processed realizes its different function, such as: LED light can be made to issue the light of different colours, dodged while luminous
Sparkle etc., keep LED light more dazzling good-looking.
But at present in LED circuit, after LED light is closed, some components in circuit are in electricity condition,
Cause the power consumption in entire circuit very big, cause the waste to resource, component is lost constantly to electricity condition for a long time, drops
The service life of component in low circuit.
Utility model content
Based on this, the utility model provides a kind of LED power control circuit.
A kind of LED power control circuit, including amplifying circuit, field-effect tube Q1, resistance R1, R2, R3, R4, capacitor C1, electricity
The signal output end of one end and amplifying circuit for hindering R1 connects, and the other end is connect with one end of resistance R2, the other end of resistance R2
It is connect with voltage signal output end, the grid source of field-effect tube Q1 is commonly connected with the signal output end of resistance R1 and amplifying circuit
Point connection, one end of resistance R3 are connect with the end power supply VCC, and the other end is connect with the source electrode of field-effect tube Q1, field-effect tube Q1's
Drain electrode is connect with one end of resistance R4, and the other end of resistance R4 is connect with voltage signal output end, one end of capacitor C1 and resistance
R1 is connected with the signal output end points of common connection of amplifying circuit, and the other end is connect with signal output end.
One of embodiment is, the amplifying circuit include diode D1, D2, D3, D4, triode Q2, Q3, Q4, electricity
R5, R6, R7, R8, R9 are hindered, one end of resistance R5 is connect with signal input part, and the other end is connect with the anode of diode D1, two poles
The cathode of pipe D1 is connect with the base stage of triode Q2, and the anode of diode D2 connects to power supply, the anode of cathode and diode D3
Connection, the cathode of diode D3 are connect with the anode of diode D4, and the cathode of diode D4 is connect with the emitter of triode Q2,
One end of resistance R6 is connect with the collector of triode Q2, and the other end is connect with the base stage of triode Q3, one end of resistance R7 with
Earth polar connection, the points of common connection connection between the other end and resistance R6 and the collector of triode Q1, the transmitting of triode Q3
Pole ground connection, collector are connect with the base stage of triode Q4, the emitter ground connection of triode Q4, and one end of collector and resistance R1 connect
It connects, resistance R8 is connected in parallel with triode Q3, and one end of resistance R9 is connect with power supply, the other end and triode Q3 collector
Points of common connection connection between triode Q4 base stage.
One of embodiment is that the amplifying circuit further includes resistance R10, the base of the one end resistance R10 and triode Q2
Points of common connection connection between pole and the cathode of diode D1, the other end are connect with earth polar.
One of embodiment is that the amplifying circuit further includes capacitor C2, and capacitor C2 is connected in parallel with resistance R10.
One of embodiment is that triode Q2 is PNP type triode.
A kind of above-mentioned LED power control circuit works as LED light by being equipped with for amplifying circuit 10 and field-effect tube Q1
When electric power starting, when input signal is low level, when the voltage of amplifying circuit output reaches preset threshold, the source of field-effect tube Q1
Pole and drain electrode conducting, drain current make entire circuit work by resistance R4 output voltage signal；When LED light power supply is closed,
When input signal is high level, keep entire amplifying circuit 10 in the conductive state, control chip U4 drop-down ground connection, field-effect tube Q1
Cut-off, Non voltage output, LED light are closed, and the operating voltage in entire circuit is reduced, and control chip U4 stops working, effectively
The power consumption reduced in circuit.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of LED power control circuit of an embodiment of the present invention.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of utility model is described in detail.Many details are explained in the following description in order to abundant
Understand the utility model.But the utility model can be implemented with being much different from other way described herein, this field
Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public affairs
The limitation for the specific embodiment opened.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertically ", " level
", "left", "right" and similar statement for illustrative purposes only, be not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" packet
Include any and all combinations of one or more related listed items.
As shown in Figure 1, a kind of LED power control circuit, including amplifying circuit 10, field-effect tube Q1, resistance R1, R2, R3,
One end of R4, capacitor C1, resistance R1 are connect with the signal output end of amplifying circuit 10, and the other end is connect with one end of resistance R2,
The other end of resistance R2 is connect with voltage signal output end, the grid source of field-effect tube Q1 and the signal of resistance R1 and amplifying circuit 10
The points of common connection of output end connects, and one end of resistance R3 is connect with the end power supply VCC, and the source electrode of the other end and field-effect tube Q1 connect
It connects, the drain electrode of field-effect tube Q1 is connect with one end of resistance R4, and the other end of resistance R4 is connect with voltage signal output end, capacitor
One end of C1 is connect with the signal output end points of common connection of resistance R1 and amplifying circuit 10, and the other end and signal output end connect
It connects.
When LED light electric power starting, when input signal is low level, when the voltage of amplifying circuit 10 reaches preset threshold,
The grid voltage of field-effect tube Q1 reaches cut-in voltage, field-effect tube Q1 conducting, and drain electrode forms drain current, and drain current passes through
Resistance R4 forms output voltage, and control LED light is opened, and control chip U4 control circuit exports Current Voltage, makes entire circuit work
Make；When LED light power supply is closed, when input signal is high level, keep entire amplifying circuit 10 in the conductive state, controls chip
U4 drop-down ground connection, field-effect tube Q1 cut-off, Non voltage output, LED light are closed, and are reduced the operating voltage in entire circuit, are controlled
Coremaking piece U4 stops working.
In this way, a kind of LED power control circuit, by being equipped with for amplifying circuit 10 and field-effect tube Q1, work as LED light
When electric power starting, when input signal is low level, when the voltage of amplifying circuit output reaches preset threshold, the source of field-effect tube Q1
Pole and drain electrode conducting, drain current make entire circuit work by resistance R4 output voltage signal；When LED light power supply is closed,
When input signal is high level, keep entire amplifying circuit 10 in the conductive state, control chip U4 drop-down ground connection, field-effect tube Q1
Cut-off, Non voltage output, LED light are closed, and the operating voltage in entire circuit is reduced, and control chip U4 stops working, effectively
The power consumption reduced in circuit.
Further, in order to which the voltage for making amplifying circuit 10 reaches preset threshold, the amplifying circuit 10 includes diode
D1, D2, D3, D4, triode Q2, Q3, Q4, resistance R5, R6, R7, R8, R9, one end of resistance R5 connect with signal input part,
The other end is connect with the anode of diode D1, and the cathode of diode D1 is connect with the base stage of triode Q2, the anode of diode D2
It connects to power supply, cathode is connect with the anode of diode D3, and the cathode of diode D3 is connect with the anode of diode D4, diode
The cathode of D4 is connect with the emitter of triode Q2, and one end of resistance R6 is connect with the collector of triode Q2, the other end and three
The base stage of pole pipe Q3 connects, and one end of resistance R7 is connect with earth polar, between the other end and resistance R6 and the collector of triode Q1
Points of common connection connection, the emitter ground connection of triode Q3, collector connect with the base stage of triode Q4, the hair of triode Q4
Emitter grounding, collector are connect with one end of resistance R1, and resistance R8 is connected in parallel with triode Q3, one end of resistance R9 and power supply
Power supply connection, the points of common connection connection between the other end and triode Q3 collector and triode Q4 base stage.
When the control signal on R5 is 1.5V or so, the base stage of Q2 shows as being more than or equal to 0.6V, Q2 conducting, while Q3
It is also switched on, at this moment Q4 pulls down to ground by Q3, ends Q4, controls chip U4 at this time and passes through amplifying circuit and field-effect tube Q1
Be equipped with, the voltage of amplifying circuit output reaches preset threshold greater than 0.9V, and the source electrode and drain electrode of field-effect tube Q1 is connected,
Drain current is by resistance R4 output voltage signal, when making LED light electric power starting, control chip control circuit output electric current electricity
Pressure makes entire circuit work；When the control signal on R5 is high level, the base stage of Q2 shows as low level, and Q2 ends, simultaneously
Q3 is also switched off, and at this moment Q4 is divided by R9, R8, and Q4 is connected, and is controlled chip U4 by Q4 and is pulled down to earth polar, at this moment without output
Voltage reduces the operating voltage in entire circuit, and control chip stops working.
In this way, by the on and off of triode Q2, triode Q3, triode Q4, to control leading for field-effect tube Q1
Logical and cut-off, when entire circuit does not work, triode Q2, triode Q3 cut-off, triode Q4 is in the conductive state, makes to control
Chip U4 pulls down to earth polar by Q4, at this moment without output voltage, makes the lower power consumption of entire circuit, further improves component
Service life.
Further, in order to keep the working condition of triode Q2 more stable, the amplifying circuit further includes resistance R10,
Points of common connection connection between the cathode of the base stage and diode D1 of the one end resistance R10 and triode Q2, the other end and earth polar
Connection.
In this way, the setting of resistance R10, effectively plays the role of biasing and shunts, effectively protect triode Q2 not
It can be damaged because of surge current, keep triode Q2 working condition more stable.
Further, the amplifying circuit further includes capacitor C2, and capacitor C2 is connected in parallel with resistance R10.
In this way, the setting of capacitor C2, effectively filters out the high frequency spurs in circuit, the steady of entire circuit work ensure that
It is qualitative.
Further, triode Q2 is PNP type triode.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (5)
1. a kind of LED power control circuit, it is characterised in that: including amplifying circuit, field-effect tube Q1, resistance R1, R2, R3, R4,
One end of capacitor C1, resistance R1 and the signal output end of amplifying circuit connect, and the other end is connect with one end of resistance R2, resistance R2
The other end connect with voltage signal output end, the signal output end of the grid source of field-effect tube Q1 and resistance R1 and amplifying circuit
Points of common connection connection, one end of resistance R3 are connect with the end power supply VCC, and the other end is connect with the source electrode of field-effect tube Q1, field effect
Should the drain electrode of pipe Q1 connect with one end of resistance R4, the other end of resistance R4 is connect with voltage signal output end, the one of capacitor C1
End is connect with the signal output end points of common connection of resistance R1 and amplifying circuit, and the other end is connect with signal output end.
2. a kind of LED power control circuit according to claim 1, it is characterised in that: the amplifying circuit includes two poles
Pipe D1, D2, D3, D4, triode Q2, Q3, Q4, resistance R5, R6, R7, R8, R9, one end of resistance R5 are connect with signal input part,
The other end is connect with the anode of diode D1, and the cathode of diode D1 is connect with the base stage of triode Q2, the anode of diode D2
It connects to power supply, cathode is connect with the anode of diode D3, and the cathode of diode D3 is connect with the anode of diode D4, diode
The cathode of D4 is connect with the emitter of triode Q2, and one end of resistance R6 is connect with the collector of triode Q2, the other end and three
The base stage of pole pipe Q3 connects, and one end of resistance R7 is connect with earth polar, between the other end and resistance R6 and the collector of triode Q1
Points of common connection connection, the emitter ground connection of triode Q3, collector connect with the base stage of triode Q4, the hair of triode Q4
Emitter grounding, collector are connect with one end of resistance R1, and resistance R8 is connected in parallel with triode Q3, one end of resistance R9 and power supply
Power supply connection, the points of common connection connection between the other end and triode Q3 collector and triode Q4 base stage.
3. a kind of LED power control circuit according to claim 2, it is characterised in that: the amplifying circuit further includes electricity
R10 is hindered, the points of common connection connection between the cathode of the base stage and diode D1 of the one end resistance R10 and triode Q2, the other end
It is connect with earth polar.
4. a kind of LED power control circuit according to claim 2, it is characterised in that: the amplifying circuit further includes electricity
Hold C2, capacitor C2 is connected in parallel with resistance R10.
5. a kind of LED power control circuit according to claim 3, it is characterised in that: triode Q2 is three pole of positive-negative-positive
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822174411.9U CN209545957U (en) | 2018-12-24 | 2018-12-24 | A kind of LED power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822174411.9U CN209545957U (en) | 2018-12-24 | 2018-12-24 | A kind of LED power control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209545957U true CN209545957U (en) | 2019-10-25 |
Family
ID=68265861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822174411.9U Active CN209545957U (en) | 2018-12-24 | 2018-12-24 | A kind of LED power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209545957U (en) |
-
2018
- 2018-12-24 CN CN201822174411.9U patent/CN209545957U/en active Active
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