CN206237635U - A kind of adjusting control circuit for LED desk lamp - Google Patents
A kind of adjusting control circuit for LED desk lamp Download PDFInfo
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- CN206237635U CN206237635U CN201621216954.7U CN201621216954U CN206237635U CN 206237635 U CN206237635 U CN 206237635U CN 201621216954 U CN201621216954 U CN 201621216954U CN 206237635 U CN206237635 U CN 206237635U
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Abstract
The utility model discloses a kind of adjusting control circuit for LED desk lamp, it includes rectifier unit, dimmer unit, controller unit and LED string, the input of rectifier unit is terminated at civil power, the output of rectifier unit is terminated at the input of dimmer unit and the input of controller unit, the output of dimmer unit is terminated at the input of LED string, and dimmer unit and controller unit are bi-directionally connected；Wherein, the controller unit using model HC8T1212 chip and its follow circuit realiration；The dimmer unit using model DU8623 chip and its follow circuit realiration.The utility model uses above-mentioned HC8T1212 chips+DU8623 chip solutions, solves the skimble-scamble problem of constant current output when in the market simulation light modulation product low-grade location starts；Adjusting control circuit simple structure for LED desk lamp of the present utility model, it is easy to control, it is easy to implement, with good practicality.
Description
Technical field
The utility model is related to a kind of adjusting control circuit for LED desk lamp.
Background technology
The simulation lamp dimmer that present market is sold, is given after the touch signal for receiving human body by touch controller
PWM（Pulse Width Modulation, pulse width modulation）Signal, transfers to hardware circuit to be converted into DC level signal,
The setting for dimming is done to constant current IC again to use.In actual use, when low-grade location, the dutycycle of pwm signal is minimum, about
PWM less than 20%, 20% changes into DC level signal this voltage commonly less than 1V, because of the touch IC that touch controller is used
Input voltage generally be less than or equal to 5V, if 1V simulation dim signal to desk lamp constant current IC, in the main electricity of desk lamp
Road then generally existing following phenomenon when just going up electricity：1st, low grade is unable to bright light；2nd, low-grade lamp flicker；3rd, low-grade king light brightness is indefinite,
I.e. continuous current varies.
Market is directed to problem above, is all the attitude of the avoidance for using, or height, such as 30% are done in the setting of deep low gear
Or 40% dutycycle, such analog voltage is just high, and the probability for ging wrong is smaller, but the consequence of do so is to consume all to enjoy
Less than the facility that LED desk lamps with dimmer switch bring.Some producers forbid desk lamp to start with low gear, are so unfavorable for that client sets.Also
Some producers tail off gear is dimmed.
It is therefore desirable to solve the problems, such as above-mentioned analog light-adjusting circuit low grade poor starting, there is provided one kind can conveniently be implemented
While cost low solution again.
Utility model content
Therefore, for above-mentioned problem, the utility model proposes a kind of adjusting control circuit for LED desk lamp, to existing
Some adjusting control circuits are improved, and solve the problems, such as analog light-adjusting circuit low grade poor starting.
In order to solve the above-mentioned technical problem, the technical scheme that the utility model is used is, a kind of tune for LED desk lamp
Light control circuit, including rectifier unit, dimmer unit, controller unit and LED string, the input termination of rectifier unit
In civil power, the output of rectifier unit is terminated at the input of dimmer unit and the input of controller unit, light modulator list
The output of unit is terminated at the input of LED string, and dimmer unit and controller unit are bi-directionally connected；Wherein, the controller
Unit using model HC8T1212 chip and its follow circuit realiration；The dimmer unit is using model DU8623's
Chip and its follow circuit realiration.
Used as a preferred scheme, the controller unit includes chip U1, electric capacity C1, electric capacity C18, electric capacity C15, electricity
Hold C16, electric capacity C19, resistance R8, resistance R15, resistance R17 and resistance R70, chip U1 uses the chip of model HC8T1212
Realize, rectifier unit is connected to all the way after the 15th pin serial connection resistance R70 of chip U1, the 11st of chip U1 is connected all the way and is drawn
Pin；One end of electric capacity C18, the 10th pin of chip U1, electric capacity C19 are connected after the 11st pin serial connection electric capacity C15 of chip U1
One end and one end of electric capacity C16；The other end of electric capacity C18 is connected to the 12nd pin of chip U1, the other end and electricity of electric capacity C19
The other end for holding C16 is connected to the 9th pin of chip U1；Light modulation is connected to all the way after the 13rd pin serial connection resistance R8 of chip U1
Device unit, is grounded after series resistance R17 all the way, is grounded after resistance R15 and electric capacity C1 is sequentially connected in series all the way.By experiment and reality
Using checking, its effect is best when the resistance of the resistance R15 is 3.6K.
Used as a specific scheme, the dimmer unit includes chip U3, electric capacity C3, electric capacity C5, electric capacity C7, electric capacity
C9, electric capacity C14, electric capacity C17, electrochemical capacitor CE2, diode D1, inductance L1, inductance L4, inductance L8, resistance R4, resistance R14,
Resistance R21, resistance R23 and resistance R24, chip U3 realize that the 1st pin of chip U3 is connected using the chip of model DU8623
To controller unit；It is grounded after the 2nd pin serial connection electric capacity C14 of chip U3；The 3rd pin ground connection of chip U3；The 4th of chip U3
Pin is grounded after series capacitance C17 all the way, and rectifier unit, one end of inductance L8, electrolysis are connected after another road series resistance R21
The first input end of the positive pole of electric capacity CE2, one end of resistance R4, one end of electric capacity C7, one end of electric capacity C3 and inductance L4, electric capacity
The other end ground connection of C3；The negative pole of the other end connection diode D1 of inductance L8, the 5th of the positive pole connection chip U3 of diode D1 the
Pin；The negative pole of electrochemical capacitor CE2, the other end of resistance R4, electric capacity C7 are connected after the 5th pin serial connection inductance L1 of chip U3
Second input of the other end, one end of electric capacity C5 and inductance L4, the other end ground connection of electric capacity C5；6th pin of chip U3 connects
The 5th pin and one end of electric capacity C9 of chip U3 is connect, is grounded after the other end series resistance R14 of electric capacity C9；Draw the 7th of chip U3
One end of 8th pin, one end of resistance R23 and resistance R24 of pin connection chip U3, the other end of resistance R23 and resistance R24's
The other end is grounded.LED string is connected in parallel between first output end and the second output end of inductance L4.
Further, the adjusting control circuit also includes white light backlight and RGB lamps, white light backlight and RGB lamps it is defeated
Enter to be terminated at the output end of controller unit.White light backlight and RGB lamps may be used to indicate purposes.
Further, the adjusting control circuit also includes push-button unit, and the output of push-button unit is terminated at controller unit
Input.Push-button unit is used to receive the instruction of user, and passes to controller unit.
The utility model uses above-mentioned HC8T1212 chips+DU8623 chip solutions, solves in the market simulation light modulation product
The skimble-scamble problem of constant current output when low-grade location starts；And by Optimal Parameters, critical device resistance R15 is set up, made
The effect of its being optimal；Adjusting control circuit simple structure for LED desk lamp of the present utility model, it is easy to control, easily
In implementation, with good practicality.
Brief description of the drawings
Fig. 1 is the theory diagram of adjusting control circuit of the present utility model；
Fig. 2 is the circuit theory diagrams of adjusting control circuit of the present utility model.
Specific embodiment
The utility model is further illustrated in conjunction with the drawings and specific embodiments.
As a specific example, referring to Fig. 1, a kind of adjusting control circuit for LED desk lamp of the present utility model,
Including rectifier unit, dimmer unit, controller unit, LED string, white light backlight, RGB lamps and push-button unit, rectification
The input of device unit is terminated at civil power, and the output of rectifier unit is terminated at the input and controller unit of dimmer unit
Input, the output of dimmer unit is terminated at the input of LED string, and dimmer unit and controller unit are bi-directionally connected；
The input of white light backlight and RGB lamps is terminated at the output end of controller unit, and white light backlight and RGB lamps may be used to indicate
With.The output of push-button unit is terminated at the input of controller unit, and push-button unit is used to receive the instruction of user, and passes to
Controller unit.
Fig. 2 is the electrical schematic diagram and light modulation relevant portion of the adjusting control circuit for LED desk lamp of the present utility model, its
In, controller unit includes chip U1, electric capacity C1, electric capacity C18, electric capacity C15, electric capacity C16, electric capacity C19, resistance R8, resistance
R15, resistance R17 and resistance R70, chip U1 use the chip of model HC8T1212 to realize, the 15th pin serial connection of chip U1
Rectifier unit is connected to after resistance R70 all the way, the 11st pin of chip U1 is connected all the way；The 11st pin serial connection electricity of chip U1
One end, one end of the 10th pin, one end of electric capacity C19 and electric capacity C16 of chip U1 of electric capacity C18 is connected after appearance C15；Electric capacity
The other end of C18 is connected to the 12nd pin of chip U1, and the other end of electric capacity C19 and the other end of electric capacity C16 are connected to chip
9th pin of U1；Dimmer unit is connected to all the way after the 13rd pin serial connection resistance R8 of chip U1, all the way series resistance R17
After be grounded, be sequentially connected in series all the way after resistance R15 and electric capacity C1 and be grounded.By experiment and actually used checking, the resistance of resistance R15
Its effect is best during for 3.6K.
Dimmer unit includes chip U3, electric capacity C3, electric capacity C5, electric capacity C7, electric capacity C9, electric capacity C14, electric capacity C17, electrolysis
Electric capacity CE2, diode D1, inductance L1, inductance L4, inductance L8, resistance R4, resistance R14, resistance R21, resistance R23 and resistance
R24, chip U3 realize that the 1st pin of chip U3 is connected to controller unit using the chip of model DU8623；Chip U3's
It is grounded after 2nd pin serial connection electric capacity C14；The 3rd pin ground connection of chip U3；4th pin of chip U3 is all the way after series capacitance C17
Ground connection, connects rectifier unit, one end of inductance L8, the positive pole of electrochemical capacitor CE2, resistance R4 after another road series resistance R21
One end, one end of electric capacity C7, the first input end of one end of electric capacity C3 and inductance L4, the other end ground connection of electric capacity C3；Inductance
The negative pole of the other end connection diode D1 of L8, the 5th pin of the positive pole connection chip U3 of diode D1；Draw the 5th of chip U3
Negative pole, the other end of resistance R4, the other end of electric capacity C7, the one of electric capacity C5 of electrochemical capacitor CE2 are connected after pin series inductance L1
End and second input of inductance L4, the other end ground connection of electric capacity C5；5th pin of the 6th pin connection chip U3 of chip U3
With one end of electric capacity C9, it is grounded after the other end series resistance R14 of electric capacity C9；The 8th of the 7th pin connection chip U3 of chip U3
One end of pin, one end of resistance R23 and resistance R24, the other end of resistance R23 and the other end ground connection of resistance R24.Inductance L4
The first output end and the second output end between be connected in parallel LED string.
The utility model uses such scheme, when low grade starts, is directly exported different from currently marketed like product
PWM, but the high level of a length of 0.01 second does startup use to simulation dimmer unit when first exporting one section, is exported again after 0.01 second
The corresponding PWM 10% of this gear or other.Generally, the analog signal of controller unit output PWM waveform is to pass through
Two electric resistance partial pressures, the output for meeting PWM, another earthing potential；The resistance of earthing potential is again and a upper 1UF left side simultaneously
Right electric capacity.In the utility model, be improved to electric capacity C1 first connected with a resistance R15, then and with ground potential be connected divide
On piezoresistance R16.
This new realization principle is specifically described below：In Fig. 2, in controller unit, chip U1 uses model
The chip of HC8T1212 is realized；In dimmer unit, constant current chip is realized using the chip of model DU8623.Specifically, core
Piece U1 is touch controller, the 13rd pin output PWM dimming waveforms of chip U1 through resistance R8, resistance R17 partial pressures, resistance R15 and
Electric capacity C1 is filtered.The addition of resistance R15 is that this is new based on the demand for optimizing whole circuit.Described further below this is set up
The effect of resistance R15 and the value of this patent：When chip U1 receives low-grade location enabling signal, 20% or 10% dutycycle is exported
Waveform, if not setting up resistance R15, routinely analyze, through electric resistance partial pressure again by C1 filtering can be obtain one it is steady
Fixed analog signal is given U3 and is dimmed, but the signal of this stabilization has a state ignored before producing, due to
The capacitive character of electric capacity C1 is that electric capacity both end voltage can not be mutated therefore upper his voltage of electric initial stage is 0V, then is filled by relatively slow
Electric process just reaches simulation dimmer voltage value.Constant current chip during this（DU8623）In the middle of work, he is not
Can wait until that the analog signal complete stability of chip U1 works again after establishing, therefore because analog signal voltage is too less than perseverance during start
The value that stream chip normal energy is sensed, so low-grade startup is unable to steady operation.And with the addition of the resistance R15 shown in figure and then may be used
This problem is solved with perfection, even if reason is electric capacity C1 did not had voltage at the upper electric initial stage, can also be assigned on resistance R15 enough
Allow the signal of constant current chip U3 normal responses.The occurrence of resistance R15 may be referred to the minimum response electricity of specifications of constant current chip
Press and be determined by experiment, during this is new, its value is 3.6K.
In addition, the minimum shelves dutycycle of the 12nd pin output of chip U1 is relatively low so cause low-grade poor starting, in hardware
Reason is had been described above in implementation, it is assumed that if touch controller chip U1 first exports one section of high level before deep low gear PWM and allows perseverance
Stream chip be introduced into normal working condition, after high level output very short a period of time through test 0.01 to 0.005 it
Between be proper.Corresponding 20% or 10% or other dutycycle dim signal is followed by exported again there will be no problem
, because the light modulation analog level signal that obtains of constant current chip is from the recognizable interval of stabilization for being triggered to shutdown and being always held at IC
Interior, then circuit also just can steady operation.
It is of the present utility model to use the above-mentioned adjusting control circuit for LED desk lamp, using single-chip microcomputer HC8T1212 and perseverance
Stream chip DU8623 coordinates light modulation, it is easy to implement, and practical scheme of the present utility model can solve simulation light modulation with very effective
Low grade start and the problem of job insecurity, fraction defective is reduced to production, improves First Pass Yield, and reduces cost has huge work
With, can also meet demand of the market to product specification, there is huge meaning to market development.In addition, scheme of the present utility model is also
It is easily controllable, it is easy to implement.
Although specifically showing and describing the utility model with reference to preferred embodiment, those skilled in the art should
This is understood, not departing from the spirit and scope of the present utility model that appended claims are limited, in form and details
On the utility model can be made a variety of changes, be protection domain of the present utility model.
Claims (6)
1. a kind of adjusting control circuit for LED desk lamp, it is characterised in that：Including rectifier unit, dimmer unit, control
Device unit and LED string, the input of rectifier unit are terminated at civil power, and the output of rectifier unit is terminated at dimmer unit
The input of input and controller unit, the output of dimmer unit is terminated at the input of LED string, dimmer unit and
Controller unit is bi-directionally connected；Wherein, the controller unit using model HC8T1212 chip and its follow circuit reality
It is existing；The dimmer unit using model DU8623 chip and its follow circuit realiration.
2. the adjusting control circuit for LED desk lamp according to claim 1, it is characterised in that：The controller unit
Including chip U1, electric capacity C1, electric capacity C18, electric capacity C15, electric capacity C16, electric capacity C19, resistance R8, resistance R15, resistance R17 and electricity
Resistance R70, chip U1 are realized using the chip of model HC8T1212, connected all the way after the 15th pin serial connection resistance R70 of chip U1
Rectifier unit is connected to, the 11st pin of chip U1 is connected all the way；Electric capacity is connected after the 11st pin serial connection electric capacity C15 of chip U1
One end of C18, one end of the 10th pin, one end of electric capacity C19 and electric capacity C16 of chip U1；The other end of electric capacity C18 is connected to
12nd pin of chip U1, the other end of electric capacity C19 and the other end of electric capacity C16 are connected to the 9th pin of chip U1；Chip U1
The 13rd pin serial connection resistance R8 after be connected to dimmer unit all the way, all the way after series resistance R17 be grounded, be sequentially connected in series all the way
It is grounded after resistance R15 and electric capacity C1.
3. the adjusting control circuit for LED desk lamp according to claim 2, it is characterised in that：The resistance of the resistance R15
It is 3.6K to be worth.
4. the adjusting control circuit for LED desk lamp according to claim 1 or 2 or 3, it is characterised in that：The light modulation
Device unit includes chip U3, electric capacity C3, electric capacity C5, electric capacity C7, electric capacity C9, electric capacity C14, electric capacity C17, electrochemical capacitor CE2, two poles
Pipe D1, inductance L1, inductance L4, inductance L8, resistance R4, resistance R14, resistance R21, resistance R23 and resistance R24, chip U3 are used
The chip of model DU8623 realizes that the 1st pin of chip U3 is connected to controller unit；The 2nd pin serial connection electricity of chip U3
It is grounded after holding C14；The 3rd pin ground connection of chip U3；4th pin of chip U3 is grounded after series capacitance C17 all the way, another road string
Rectifier unit, one end of inductance L8, the positive pole of electrochemical capacitor CE2, one end of resistance R4, electric capacity C7 are connected after connection resistance R21
One end, one end of electric capacity C3 and inductance L4 first input end, electric capacity C3 the other end ground connection；The other end connection of inductance L8
The negative pole of diode D1, the 5th pin of the positive pole connection chip U3 of diode D1；After the 5th pin serial connection inductance L1 of chip U3
The of the negative pole of connection electrochemical capacitor CE2, the other end of resistance R4, the other end of electric capacity C7, one end of electric capacity C5 and inductance L4
Two inputs, the other end ground connection of electric capacity C5；5th pin of the 6th pin connection chip U3 of chip U3 and one end of electric capacity C9,
It is grounded after the other end series resistance R14 of electric capacity C9；8th pin of the 7th pin connection chip U3 of chip U3, resistance R23
One end and one end of resistance R24, the other end of resistance R23 and the other end ground connection of resistance R24.
5. the adjusting control circuit for LED desk lamp according to claim 1 or 2 or 3, it is characterised in that：The light modulation control
Circuit processed also includes white light backlight and RGB lamps, and the input of white light backlight and RGB lamps is terminated at the output of controller unit
End.
6. the adjusting control circuit for LED desk lamp according to claim 1 or 2 or 3, it is characterised in that：The light modulation control
Circuit processed also includes push-button unit, and the output of push-button unit is terminated at the input of controller unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621216954.7U CN206237635U (en) | 2016-11-11 | 2016-11-11 | A kind of adjusting control circuit for LED desk lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621216954.7U CN206237635U (en) | 2016-11-11 | 2016-11-11 | A kind of adjusting control circuit for LED desk lamp |
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| Publication Number | Publication Date |
|---|---|
| CN206237635U true CN206237635U (en) | 2017-06-09 |
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ID=58990084
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621216954.7U Active CN206237635U (en) | 2016-11-11 | 2016-11-11 | A kind of adjusting control circuit for LED desk lamp |
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| Country | Link |
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| CN (1) | CN206237635U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109104795A (en) * | 2018-09-30 | 2018-12-28 | 厦门思泰克智能科技股份有限公司 | Dimmable L ED drive control circuit |
-
2016
- 2016-11-11 CN CN201621216954.7U patent/CN206237635U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109104795A (en) * | 2018-09-30 | 2018-12-28 | 厦门思泰克智能科技股份有限公司 | Dimmable L ED drive control circuit |
| CN109104795B (en) * | 2018-09-30 | 2023-12-22 | 厦门思泰克智能科技股份有限公司 | Dimmable LED drive control circuit |
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