CN207219108U - Three sections of change optical circuits are realized in a kind of small-power single channel output - Google Patents
Three sections of change optical circuits are realized in a kind of small-power single channel output Download PDFInfo
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- CN207219108U CN207219108U CN201721084664.6U CN201721084664U CN207219108U CN 207219108 U CN207219108 U CN 207219108U CN 201721084664 U CN201721084664 U CN 201721084664U CN 207219108 U CN207219108 U CN 207219108U
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Abstract
The utility model discloses a kind of output of small-power single channel to realize three sections of change optical circuits, from common Flyback configuration scheme, it is exactly a common constant-current supply when not accessing sectional dimming circuit, sectional dimming circuit is accessed according to mode as depicted can realize sectional dimming function, different CS resistance values are obtained from RCS2 parallel connections by resistances different RCS1/RCS3, finally change the current value of output.RCS1 and RCS3 resistances can be carried out according to actual demand arrange in pairs or groups resistance can arrange in pairs or groups out arbitrary proportion output current it is flexible；The shortcomings that common flyback IC is more cheap than light modulation IC's, and this all makes up existing scheme well.The utility model only needs a common power IC+ single-chip microcomputer can to realize the effect of sectional dimming；The CS resistance cans of modification different proportion realize the sectional dimming of different proportion electric current；Power-fail memory function；Design principle is simple, and cost is low；Light modulation current ratio can be changed flexibly；Circuit is simply easily realized；Cost advantage is obvious.
Description
Technical field
It the utility model is related to field of illumination lamp technology, and in particular to three sections of darkenings are realized in a kind of small-power single channel output
Circuit.
Background technology
At present, LED is widely used in portable lighting field, and it has efficiency high, long lifespan and the advantage such as green, wins
Users' welcome was obtained, is considered as most potential lighting source of future generation, the market of LED commercial lightings in recent years is even more to obtain
Rapid development.Megastore, large supermarket, Large-scale Hotel, office building LED illumination lamp is a feast for the eyes, can be found everywhere.
From the IC+ chip microcontroller sectional dimmings with dimming function, pass through monolithic machine testing input voltage, output setting
The PWM waveform of dutycycle is given to light modulation IC DIM pin, and light modulation IC electric currents according to corresponding to the output of PWM models realize sectional dimming
Function, as shown in Figure 1.
Using solidification dimming power source IC, IC the detection input voltage of fixed output current ratio and the order of brightness change
Switch switching exports IC setting electric currents with ratio in a fixed order, as shown in Figure 2.
But prior art has the disadvantage that：
1) special light modulation IC, is needed, is restricted in type selecting；
2), light modulation IC increased relative to common power supply IC costs；
3), the order of segmented conversion and light modulation current ratio are fixed, it is impossible to flexibly modification.
Utility model content
In view of this, in order to solve above mentioned problem of the prior art, the utility model proposes a kind of small-power single channel is defeated
Go out to realize three sections of change optical circuits.
The utility model is solved the above problems by following technological means：
Three sections of change optical circuits, including Power Switch IC chips, MCU chip are realized in a kind of small-power single channel output,
The pin VCC of the pin VCC connection MCU chips of Power Switch IC chips, pin VCC the first electric capacity of connection C-VCC of MCU chip
Positive pole, the first electric capacity C-VCC negative pole ground connection, pin VCC the first diodes of connection D-VCC of Power Switch IC chips
Negative pole, the assists winding that the first diode D-VCC positive pole passes through transformer T1 connects the first electric capacity C-VCC negative pole,
The metal-oxide-semiconductor Q of pin G connections the 3rd of Power Switch IC chips G poles, the primary that the 3rd metal-oxide-semiconductor Q D poles pass through transformer T1
Winding connects input voltage positive pole, the pin CS, Power of the 3rd metal-oxide-semiconductor Q S poles connection Power Switch IC chips
Pin CS the second metal-oxide-semiconductors of connection P2 of Switch IC chips D poles, the pin P2 of the second metal-oxide-semiconductor P2 G poles connection MCU chip, the
By 3rd resistor RCS3 the first electric capacity of connection C-VCC negative pole, the second metal-oxide-semiconductor P2 D poles pass through for two metal-oxide-semiconductor P2 S poles
Two resistance RCS2 the first electric capacity of connection C-VCC negative pole, the second metal-oxide-semiconductor P2 the first metal-oxide-semiconductor P1 of D poles connection D poles, first
The pin P1, the first metal-oxide-semiconductor P1 of metal-oxide-semiconductor P1 G poles connection MCU chip S poles pass through first resistor RCS1 the first electric capacity of connection C-
VCC negative pole, in addition to the second diode D, the second diode D positive pole pass through the electricity of transformer T1 secondary windings connection second
Hold CE negative pole, the second electric capacity CE positive pole connects the second diode D negative pole, armature winding and input voltage in transformer T1
That end, secondary windings and the second electric capacity CE negative poles that end of positive pole connection, assists winding are connected with the first electric capacity C-VCC negative poles
That end of connection is Same Name of Ends, and the second electric capacity CE positive pole connects the positive pole of the first LED 1, the first light-emitting diodes
Pipe LED1 negative pole connects the second LED N positive pole, and the second LED N negative pole connects the second electric capacity
CE negative pole.
Compared with prior art, the beneficial effects of the utility model are as follows：
1) a common power IC+ single-chip microcomputer can, is only needed to realize the effect of sectional dimming；
2) the CS resistance cans for, changing different proportion realize the sectional dimming of different proportion electric current；
3), power-fail memory function, input power-off time ＞ 5S can recover the state before power-off when being once again powered up；
4), design principle is simple, and cost is low；
5), light modulation current ratio can be changed flexibly；
6), circuit is simply easily realized；
7), cost advantage is obvious.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the circuit diagram that prior art uses IC+ chip microcontroller sectional dimmings；
Fig. 2 is circuit diagram of the prior art using the IC light modulations of solidification dimming power source；
Fig. 3 is the schematic diagram that three sections of change optical circuits are realized in the output of the utility model small-power single channel.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with accompanying drawing and
The technical solution of the utility model is described in detail specific embodiment.It is pointed out that described embodiment is only
Only it is the utility model part of the embodiment, rather than whole embodiments, based on the embodiment in the utility model, this area
The every other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to the utility model
The scope of protection.
As shown in figure 3, the utility model, which provides a kind of small-power single channel output, realizes three sections of change optical circuits, including Power
Switch IC chips, MCU chip, the pin VCC of the pin VCC connection MCU chips of Power Switch IC chips, MCU chip
Pin VCC the first electric capacity of connection C-VCC positive pole, the first electric capacity C-VCC negative pole ground connection, the pin of Power Switch IC chips
VCC the first diodes of connection D-VCC negative pole, the first diode D-VCC positive pole are connected by transformer T1 assists winding
First electric capacity C-VCC negative pole, the metal-oxide-semiconductor Q of pin G connections the 3rd of Power Switch IC chips G poles, the 3rd metal-oxide-semiconductor Q D
Pole connects input voltage positive pole, the 3rd metal-oxide-semiconductor Q S poles connection Power Switch IC cores by transformer T1 armature winding
Pin CS the second metal-oxide-semiconductors of connection P2 of pin CS, Power the Switch IC chips of piece D poles, the second metal-oxide-semiconductor P2 G poles connection
The pin P2, the second metal-oxide-semiconductor P2 of MCU chip S poles pass through 3rd resistor RCS3 the first electric capacity of connection C-VCC negative pole, the 2nd MOS
By second resistance RCS2 the first electric capacity of connection C-VCC negative pole, the second metal-oxide-semiconductor P2 D poles connect the first MOS for pipe P2 D poles
Pipe P1 D poles, the pin P1 of the first metal-oxide-semiconductor P1 G poles connection MCU chip, the first metal-oxide-semiconductor P1 S poles pass through first resistor RCS1
Connect the first electric capacity C-VCC negative pole, include the second diode D, the second diode D positive pole secondary that passes through transformer T1
Winding connects the second electric capacity CE negative pole, and the second electric capacity CE positive pole connects the second diode D negative pole, primary in transformer T1
That end that end that winding is connected with input voltage positive pole, assists winding are connected with the first electric capacity C-VCC negative poles, secondary windings with
That end of second electric capacity CE negative poles connection is Same Name of Ends, and the second electric capacity CE positive pole is connecting the first LED 1 just
Pole, the negative pole of the first LED 1 connect the second LED N positive pole, the second LED N's
Negative pole connects the second electric capacity CE negative pole.
The utility model power supply selects common Flyback configuration scheme, is exactly one general when not accessing sectional dimming circuit
Logical constant-current supply, sectional dimming circuit is accessed according to mode as depicted can realize sectional dimming function, pass through
Resistances different RCS1/RCS3 obtains different CS resistance values from RCS2 parallel connections, finally changes the current value of output.RCS1 and
RCS3 resistances can be carried out according to actual demand arrange in pairs or groups resistance can arrange in pairs or groups out arbitrary proportion output current it is flexible；Commonly
Cheap, the shortcomings that this all makes up existing scheme well of flyback IC than light modulation IC.
The utility model Power Switch IC VCC pin need one 5V of partial pressure voltage to give MCU mono- stable confession
Electricity.MCU two-way output I/O mouths are connected to the resistance in parallel that CS resistance is controlled on two small metal-oxide-semiconductors of P1/P2 respectively.
The assists winding partial pressure of transformer gives MCU mono- stable 5V power supply, while connects two from transformer assists winding
Individual electric resistance partial pressure to MCU as detection of power loss, two PWM output pins of MCU be coupled with two MOS of P1/P2 G extremely on, work
Principle is that, when input switch is shut, power supply normal work, 5V voltages stable transformer supply MCU, MCU P1 export high electric
Flat, control P1MOS pipes conducting RCS1 and RCS2 Parallel opertation corresponding currents, when input switch is powered-down once, transformer exports meeting
And then voltage declines once, voltage on winding also can and then decline, and at this moment MCU detects power down once, and MCU P1 will
Export as low level, and MCU P2 can export high level signal, control P2MOS pipe conductings RCS3 is corresponding with RCS1 Parallel opertations electric
Stream, then input switch is powered-down once, transformer output can follow voltage to decline once, under the voltage on winding can also be followed
Drop, at this moment MCU detect power down once, MCU P1/P2 will export high level signal simultaneously, P1/P2MOS is simultaneously turned on
Now CS resistance minimum output current in parallel is maximum.Switch switches sectional dimming electric current circulation change always always for input, defeated
Enter the state before can recovering power-off when power-off time ＞ 5S are once again powered up.
Compared with prior art, the beneficial effects of the utility model are as follows：
1) a common power IC+ single-chip microcomputer can, is only needed to realize the effect of sectional dimming；
2) the CS resistance cans for, changing different proportion realize the sectional dimming of different proportion electric current；
3), power-fail memory function, input power-off time ＞ 5S can recover the state before power-off when being once again powered up；
4), design principle is simple, and cost is low；
5), light modulation current ratio can be changed flexibly；
6), circuit is simply easily realized；
7), cost advantage is obvious.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to the utility model patent scope.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (1)
1. three sections of change optical circuits are realized in a kind of output of small-power single channel, it is characterised in that including Power SwitchIC chips,
MCU chip, the pin VCC of the pin VCC connection MCU chips of Power Switch IC chips, the electricity of pin VCC connections first of MCU chip
Hold C-VCC positive pole, the first electric capacity C-VCC negative pole ground connection, pin VCC the first diodes of connection of Power SwitchIC chips
D-VCC negative pole, the first diode D-VCC positive pole connect the negative of the first electric capacity C-VCC by transformer T1 assists winding
Pole, the metal-oxide-semiconductor Q of pin G connections the 3rd of Power Switch IC chips G poles, the 3rd metal-oxide-semiconductor Q D poles pass through transformer T1's
Armature winding connects input voltage positive pole, the pin CS, Power of the 3rd metal-oxide-semiconductor Q S poles connection Power Switch IC chips
Pin CS the second metal-oxide-semiconductors of connection P2 of Switch IC chips D poles, the pin P2 of the second metal-oxide-semiconductor P2 G poles connection MCU chip, the
By 3rd resistor RCS3 the first electric capacity of connection C-VCC negative pole, the second metal-oxide-semiconductor P2 D poles pass through for two metal-oxide-semiconductor P2 S poles
Two resistance RCS2 the first electric capacity of connection C-VCC negative pole, the second metal-oxide-semiconductor P2 the first metal-oxide-semiconductor P1 of D poles connection D poles, first
The pin P1, the first metal-oxide-semiconductor P1 of metal-oxide-semiconductor P1 G poles connection MCU chip S poles pass through first resistor RCS1 the first electric capacity of connection C-
VCC negative pole, in addition to the second diode D, the second diode D positive pole pass through the electricity of transformer T1 secondary windings connection second
Hold CE negative pole, the second electric capacity CE positive pole connects the second diode D negative pole, armature winding and input voltage in transformer T1
That end, secondary windings and the second electric capacity CE negative poles that end of positive pole connection, assists winding are connected with the first electric capacity C-VCC negative poles
That end of connection is Same Name of Ends, and the second electric capacity CE positive pole connects the positive pole of the first LED 1, the first light-emitting diodes
Pipe LED1 negative pole connects the second LED N positive pole, and the second LED N negative pole connects the second electric capacity
CE negative pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721084664.6U CN207219108U (en) | 2017-08-28 | 2017-08-28 | Three sections of change optical circuits are realized in a kind of small-power single channel output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721084664.6U CN207219108U (en) | 2017-08-28 | 2017-08-28 | Three sections of change optical circuits are realized in a kind of small-power single channel output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207219108U true CN207219108U (en) | 2018-04-10 |
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ID=61825391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721084664.6U Expired - Fee Related CN207219108U (en) | 2017-08-28 | 2017-08-28 | Three sections of change optical circuits are realized in a kind of small-power single channel output |
Country Status (1)
| Country | Link |
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| CN (1) | CN207219108U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677956A (en) * | 2019-10-15 | 2020-01-10 | 横店集团得邦照明股份有限公司 | LED circuit with silicon controlled rectifier dimming and switch section switching and implementation method thereof |
-
2017
- 2017-08-28 CN CN201721084664.6U patent/CN207219108U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677956A (en) * | 2019-10-15 | 2020-01-10 | 横店集团得邦照明股份有限公司 | LED circuit with silicon controlled rectifier dimming and switch section switching and implementation method thereof |
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| GR01 | Patent grant | ||
| 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: 20180410 |