CN202488823U - Dimming LED (light-emitting diode) controller - Google Patents
Dimming LED (light-emitting diode) controller Download PDFInfo
- Publication number
- CN202488823U CN202488823U CN2012200566862U CN201220056686U CN202488823U CN 202488823 U CN202488823 U CN 202488823U CN 2012200566862 U CN2012200566862 U CN 2012200566862U CN 201220056686 U CN201220056686 U CN 201220056686U CN 202488823 U CN202488823 U CN 202488823U
- Authority
- CN
- China
- Prior art keywords
- controller
- links
- input
- divider resistance
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a dimming LED (light-emitting diode) controller, comprising a dimming control circuit an output terminal of which is connected with an external LED load, wherein the dimming control circuit comprises a singlechip control device and a switch tube, one I/O (input/output) port of the singlechip control device is connected with a grid of the switch tube, a source electrode of the switch tube is grounded, a drain electrode of the switch tube is connected with a negative pole input terminal of the external LED load; and the dimming LED controller is characterized by also comprising an output short circuit protection circuit, wherein the output short circuit protection circuit comprises a first divider resistor and a second divider resistor, a first terminal of the first divider resistor is connected with a positive pole power supply input terminal, a second terminal of the first divider resistor is connected with the first terminal of the second divider resistor, and the second terminal of the second divider resistor is connected with a negative pole power supply input terminal; and the second terminal of the first divider resistor is connected with another I/O port of the singlechip controller. Compared with the prior art, the dimming LED controller disclosed by the utility model has the advantages of simple circuit structure and low cost.
Description
Technical field
The utility model relates to a kind of dimming LED (Light Emitting Diode) controller.
Background technology
Existing most dimming LED (Light Emitting Diode) controller is not provided with output short circuit protection circuit, when controller uses, can have unsafe factor.Even the dimming LED (Light Emitting Diode) controller that has is provided with output short circuit protection circuit, its circuit structure is complicated, and cost is higher.
The utility model content
The utility model technical problem to be solved is to above-mentioned prior art the dimming LED (Light Emitting Diode) controller with output short circuit protection circuit that a kind of circuit structure is simple, cost is low to be provided.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this dimming LED (Light Emitting Diode) controller; The adjusting control circuit that comprises the load of output termination external LED; This adjusting control circuit comprises singlechip controller and switching tube; Wherein singlechip controller I/O I/O port links to each other with the grid of said switching tube, the source ground of said switching tube, and the drain electrode of said switching tube links to each other with the negative input of external LED load; The electrode input end of external LED load links to each other with the cathode power supply input; Ground connection behind the power input connection electric capacity of singlechip controller; It is characterized in that: said dimming LED (Light Emitting Diode) controller also comprises output short circuit protection circuit; This output short circuit protection circuit comprises first divider resistance and second divider resistance; Wherein first end of first divider resistance links to each other with the cathode power supply input, and second end of first divider resistance links to each other with first end of second divider resistance, and second end of second divider resistance links to each other with the negative power supply input; Second end of first divider resistance links to each other with another I/O I/O port of said singlechip controller, and said singlechip controller is one to have the singlechip controller of comparator.
As improvement; The dimming LED (Light Emitting Diode) controller that the utility model provides also comprises the anti-circnit NOT of input; The anti-circnit NOT of this input comprises first diode, second diode; Wherein, the anode of first diode links to each other with the cathode power supply input, first end of the negative electrode of first diode and said first divider resistance; The anode of second diode links to each other with the cathode power supply input, and the negative electrode of second diode links to each other with the power input of said singlechip controller after connecting the step-down module.
Compared with prior art; The advantage of the utility model is: form output short circuit protection circuit through two divider resistances are set; The dimming LED (Light Emitting Diode) controller that makes the utility model provide has the problem that prevents the LED load short circuits, even if the LED load short circuits can not cause the damage of controller yet; And circuit structure is simple, and cost is low; In addition, the anti-circnit NOT of input is set, the dimming LED (Light Emitting Diode) controller that makes the utility model provide has the problem of input counnter attack.
Description of drawings
Fig. 1 is the circuit theory diagrams of dimming LED (Light Emitting Diode) controller in the embodiment of the invention one.
Fig. 2 is the circuit theory diagrams of dimming LED (Light Emitting Diode) controller in the embodiment of the invention two.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Embodiment one
Referring to dimming LED (Light Emitting Diode) controller shown in Figure 1; It comprises the adjusting control circuit and the output short circuit protection circuit of the load of output termination external LED; Wherein adjusting control circuit comprises singlechip controller N1 and switching tube Q1; It is the microprocessor with comparator of PIC12F629 that singlechip controller N1 adopts model; The I/O I/O port of singlechip controller N1 (the 5th pin GP2) resistance R 4 backs link to each other with the grid of said switching tube Q1, the source ground of said switching tube Q1, and the drain electrode of said switching tube Q1 links to each other with the negative input of external LED load; The electrode input end of external LED load links to each other with the cathode power supply input; And output short circuit protection circuit comprises the first divider resistance R1 and the second divider resistance R2; Wherein, the power input of singlechip controller N1 connects capacitor C 1 back ground connection; First end of the first divider resistance R1 links to each other with the cathode power supply input, and second end of the first divider resistance R1 links to each other with first end of the second divider resistance R2, and second end of second divider resistance links to each other with the negative power supply input; Second end of the first divider resistance R1 links to each other with another I/O I/O port (the 6th pin GP1) of said singlechip controller N1.
Under the normal condition, when switching tube Q1 is not in closed condition fully, after the electrode input end short circuit of the negative input of external LED load and external LED load, can not cause the damage of dimming LED (Light Emitting Diode) controller.If switching tube Q1 is in opening; The input power source voltage will descend rapidly after the electrode input end short circuit of the negative input of external LED load and external LED load; The dividing potential drop of the first divider resistance R1 and the second divider resistance R2 also will descend rapidly; Because the existence of capacitor C 1, this moment, singlechip controller will in running order and sustainable a period of time.After the dividing potential drop of the first divider resistance R1 and the second divider resistance R2 drops to below the threshold value of comparator in the singlechip controller N1; Singlechip controller N1 closes switching tube Q1 at once; And continue long time, and will return to normal condition with damage input voltage this moment that prevents switching tube Q1, singlechip controller also turns back to normal operating conditions; And then open switching tube Q1; Size in the said process that circulates simultaneously, the dividing potential drop that continues the inspection first divider resistance R1 and the second divider resistance R2 and singlechip controller between the threshold value of comparator is till the electrode input end disconnection of the negative input of external LED load and external LED load.
Embodiment two
Different with embodiment one is, referring to shown in Figure 2, it also comprises the anti-circnit NOT of input, and this input prevents that circnit NOT comprises the first diode D1, the second diode D2; The anode of the first diode D1 links to each other with the cathode power supply input, first end of the negative electrode of the first diode D1 and the said first divider resistance R1; The anode of the second diode D2 links to each other with the cathode power supply input, and the negative electrode of the second diode D2 links to each other with the power input of said singlechip controller N1 after connecting the step-down module.
Claims (2)
1. dimming LED (Light Emitting Diode) controller; The adjusting control circuit that comprises the load of output termination external LED; This adjusting control circuit comprises singlechip controller and switching tube; Wherein singlechip controller I/O I/O port links to each other with the grid of said switching tube, the source ground of said switching tube, and the drain electrode of said switching tube links to each other with the negative input of external LED load; The electrode input end of external LED load links to each other with the cathode power supply input; Ground connection behind the power input connection electric capacity of singlechip controller; It is characterized in that: said dimming LED (Light Emitting Diode) controller also comprises output short circuit protection circuit; This output short circuit protection circuit comprises first divider resistance and second divider resistance; Wherein first end of first divider resistance links to each other with the cathode power supply input, and second end of first divider resistance links to each other with first end of second divider resistance, and second end of second divider resistance links to each other with the negative power supply input; Second end of first divider resistance links to each other with another I/O I/O port of said singlechip controller, and said singlechip controller is one to have the singlechip controller of comparator.
2. dimming LED (Light Emitting Diode) controller according to claim 1; It is characterized in that: also comprise the anti-circnit NOT of input; The anti-circnit NOT of this input comprises first diode, second diode; Wherein, the anode of first diode links to each other with the cathode power supply input, first end of the negative electrode of first diode and said first divider resistance; The anode of second diode links to each other with the cathode power supply input, and the negative electrode of second diode links to each other with the power input of said singlechip controller after connecting the step-down module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200566862U CN202488823U (en) | 2012-02-21 | 2012-02-21 | Dimming LED (light-emitting diode) controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200566862U CN202488823U (en) | 2012-02-21 | 2012-02-21 | Dimming LED (light-emitting diode) controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202488823U true CN202488823U (en) | 2012-10-10 |
Family
ID=46963205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200566862U Expired - Lifetime CN202488823U (en) | 2012-02-21 | 2012-02-21 | Dimming LED (light-emitting diode) controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202488823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595731A (en) * | 2012-02-21 | 2012-07-18 | 林万炯 | Light-dimming LED controller and output short-circuit protection method thereof |
-
2012
- 2012-02-21 CN CN2012200566862U patent/CN202488823U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595731A (en) * | 2012-02-21 | 2012-07-18 | 林万炯 | Light-dimming LED controller and output short-circuit protection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202454840U (en) | Multipurpose delay power socket | |
| CN203691724U (en) | Hot plug protection circuit used for LED illuminator | |
| CN102970791B (en) | Light-emitting diode (LED) constant current driving circuit and LED lamp | |
| CN203071896U (en) | High-anti-interference power-on reset circuit | |
| CN103826363B (en) | For the hot plug holding circuit of LED luminaire | |
| CN102595731A (en) | Light-dimming LED controller and output short-circuit protection method thereof | |
| CN202197098U (en) | Overvoltage protection circuit, light-emitting diode (LED) driving power supply and LED lighting device | |
| CN202488823U (en) | Dimming LED (light-emitting diode) controller | |
| CN205827885U (en) | A kind of LCD backlight power circuit | |
| CN103683264A (en) | Circuit for preventing reverse plug in of direct current power supply and lamp | |
| CN103269064B (en) | Zero-power-consumption releasing circuit of anti-interference capacitor at AC end of switching power supply | |
| CN202435015U (en) | Power supply system | |
| CN202548687U (en) | Electronic device and control circuit thereof | |
| CN203251282U (en) | Infrared sensor module | |
| CN201490902U (en) | Resistance-capacitance voltage reduction power circuit | |
| CN204597540U (en) | Portable power source circuit | |
| CN202260602U (en) | Power-uninterruptible low-voltage output isolation circuit | |
| CN102570200A (en) | Multi-purpose delayed power socket | |
| CN203814018U (en) | Light-operated switch circuit | |
| CN204966871U (en) | Safe socket with earthleakage protective equipment | |
| CN204465055U (en) | Indicator light change-over circuit is full of without postponing charging | |
| CN103457255A (en) | Power supply reverse-connection-preventing circuit and lamp | |
| CN203352156U (en) | Zero power consumption release circuit for anti-interference capacitors on switching power supply AC end | |
| CN203167370U (en) | Night timing lighting circuit and lamp | |
| CN203839998U (en) | Battery charging reverse-connection protecting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20140416 |
|
| RGAV | Abandon patent right to avoid regrant |