CN202652618U - Led controller driving device - Google Patents
Led controller driving device Download PDFInfo
- Publication number
- CN202652618U CN202652618U CN 201220225273 CN201220225273U CN202652618U CN 202652618 U CN202652618 U CN 202652618U CN 201220225273 CN201220225273 CN 201220225273 CN 201220225273 U CN201220225273 U CN 201220225273U CN 202652618 U CN202652618 U CN 202652618U
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- led controller
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Abstract
The utility model discloses an LED controller driving device, which comprises a circuit board and a surface mounted device arranged on the circuit board, wherein the surface mounted device constitutes an LED controller driving circuit, and the LED controller driving circuit comprises a rectifier circuit, a filter circuit electrically connected with the rectifier circuit, an integrated circuit U1 electrically connected with the filter circuit, and a transformer circuit electrically connected with the integrated circuit U1. The LED controller driving device disclosed by the utility model is simple in circuit connection, lower in cost and good in heat dissipation, and meets energy efficiency standards.
Description
Technical field
The utility model relates to the controller technology field, relates in particular to a kind of drive unit of led controller.
Background technology
The LED(light-emitting diode) have advantages of that energy consumption is low, caloric value is lower, reach long service life, in today of global energy shortage, the above-mentioned environmental protection characteristics of LED have wide application space.The drive unit of existing led controller, the electric elements on its circuit board arrange more, so the volume of its device is larger, and cost is higher.Moreover, existing led controller drive circuit, its electromagnetic compatibility is sad, and the high pressure electric leakage is sad, can not satisfy Energy Efficiency Standard.
The utility model content
The utility model proposes a kind of led controller drive unit, its circuit connects simple, has reduced cost, and heat radiation good, satisfy Energy Efficiency Standard.
For achieving the above object, the utility model provides a kind of led controller drive unit, comprise: circuit board and be arranged at element pasted on surface on the circuit board, this element pasted on surface forms a led controller drive circuit, the filter circuit that includes rectification circuit in the described led controller drive circuit, is electrically connected with rectification circuit, the integrated circuit U1 that is electrically connected with filter circuit, and with the transformer circuit of integrated circuit U1 electric connection.
Wherein, described rectification circuit comprises the diode D1, the diode D2 that are electrically connected with an ac voltage input, diode D3, and diode D4, terminal of this ac voltage input and diode D1 and diode D3 are electrically connected, another terminal of ac voltage input and diode D2 and diode D4 electric connection.
In the utility model, described ac voltage input also is electrically connected a fusible fire prevention resistance R F1, and this is fusible, and fire prevention resistance R F1 is electrically connected between diode D1 and the diode D3.
Comprise a capacitor C 1, capacitor C 2, inductance L 1, and inductance L 2 in the filter circuit of the present utility model, this inductance L 1, inductance L 2, capacitor C 1, and capacitor C 2 form a pi type filter.
Moreover, the resistance R 1 that also is connected in parallel between described capacitor C 1 and the capacitor C 2, and resistance R 2.
Optionally, described integrated circuit U1 employing model is the device of LNG605DG.
Comprise power switch, an oscillator in this integrated circuit U1, reach CC/CV control engine.
Further, include transformer T1 in the described transformer circuit, the input of this transformer T1 armature winding one side and rectification circuit and filter circuit are electrically connected; The opposite side of transformer T1 armature winding and integrated circuit U1 are electrically connected.
In addition, also be electrically connected with diode D5, resistance R 3, resistance R 4, and capacitor C 3 between described integrated circuit U1 and the transformer T1.
Led controller drive unit of the present utility model; its volume is small and exquisite; circuit connects comparatively simple, and electric elements are less, when having saved cost; has preferably heat dispersion; satisfy the requirement of Energy Efficiency Standard, in addition, its Electro Magnetic Compatibility is better; have better earth leakage protective effect, use more safe and reliable.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit connection diagram of a kind of specific embodiment of the utility model led controller drive unit.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model provides a kind of led controller drive unit, it comprises circuit board (not shown) and is arranged at element pasted on surface (SMD:Surface Mounted Devices) on the circuit board, this element pasted on surface forms a led controller drive circuit, the filter circuit that includes rectification circuit in the described led controller drive circuit, is electrically connected with rectification circuit, the integrated circuit U1 that is electrically connected with filter circuit, and with the transformer circuit of integrated circuit U1 electric connection.
In the utility model, described rectification circuit comprises the diode D1, the diode D2 that are electrically connected with an ac voltage input 10, diode D3, and diode D4, terminal of this ac voltage input 10 and diode D1 and diode D3 are electrically connected, another terminal of ac voltage input 10 and diode D2 and diode D4 electric connection.This ac voltage input 10 also is electrically connected a fusible fire prevention resistance R F1, and this is fusible, and fire prevention resistance R F1 is electrically connected between diode D1 and the diode D3.This diode D1, diode D2, diode D3, and diode D4 ac voltage input 10 is carried out rectification.
Comprise a capacitor C 1, capacitor C 2, inductance L 1 in the filter circuit of the present utility model, reach inductance L 2.Wherein, this capacitor C 1 is selected large bulk capacitance with capacitor C 2, and it is used for ac voltage input 10 is carried out filtering.This inductance L 1, inductance L 2, capacitor C 1, and capacitor C 2 form a pi type filter, can conduct low pass filter (EMI) noise to differential mode and decay.Moreover, the resistance R 1 that also is connected in parallel between described capacitor C 1 and the capacitor C 2, and resistance R 2.This resistance R 1 and resistance R 2 can damped oscillations and are improved anti-EMI performance, and fusible fire prevention resistance R F1 can be used for limit inrush currents.
As a kind of preferred embodiment of the present utility model, it is the device of LNG605DG that described integrated circuit U1 can adopt the model of the LinkSwitch-II series of the integrated company of U.S.'s power supply (Power Integrations) production.Comprise device for power switching, an oscillator in this integrated circuit U1, reach CC/CV control engine (not shown) and startup and defencive function.This integrated circuit U1 can realize self-powered fully by bypass BP pin, and capacitor C 4 is carried out decoupling.From zero load under fully loaded a plurality of patterns, controller in the integrated circuit U1 is at first in constant-voltage phase work, this moment, it controlled regulation output voltage by ON/OFF, and keep output voltage level by skipping switch periods as required, the ratio that enables cycle and disable period by adjusting is kept voltage stabilizing.This also can make the efficient of transducer be optimized in whole loading range.Under the underloading condition, also can reduce current limit reducing transformer flux density, and then reduce audio noise and switching loss.Along with the increase of load current, current limit also will raise, thereby the cycle of skipping is also fewer and feweri.In case integrated circuit U1 detects maximum power point (being that controller stops skip cycle), controller will enter constant current mode automatically.In case need further to improve load current, output voltage just can descend thereupon.When the output voltage on detecting the FB pin descended, switching frequency descended linearity, thereby guarantees constant current output.
Further, include transformer T1 in the transformer circuit of the present utility model, the input of this transformer T1 armature winding one side and rectification circuit and filter circuit are electrically connected; The opposite side of transformer T1 armature winding and the MOSFET of integrated circuit U1 pipe (not shown) are electrically connected.The opposite side of the MOSFET pipe driving transformer T1 armature winding of this integrated circuit U1.In addition, also be electrically connected with diode D5, resistance R 3, resistance R 4, and capacitor C 3 between described integrated circuit U1 and the transformer T1.This diode D5, resistance R 3, resistance R 4, and capacitor C 3 form the RCD-R clamp circuits, be used for the drain voltage spike that the restriction leakage inductance causes.
In sum; led controller drive unit of the present utility model, its volume is small and exquisite, and circuit connects comparatively simple; electric elements are less; when having saved cost, have preferably heat dispersion, satisfy the requirement of Energy Efficiency Standard; in addition; its Electro Magnetic Compatibility is better, has better earth leakage protective effect, uses more safe and reliable.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. led controller drive unit, comprise circuit board and be arranged at element pasted on surface on the circuit board, this element pasted on surface forms a led controller drive circuit, it is characterized in that, the filter circuit that includes rectification circuit in the described led controller drive circuit, is electrically connected with rectification circuit, the integrated circuit U1 that is electrically connected with filter circuit, and with the transformer circuit of integrated circuit U1 electric connection.
2. led controller drive unit as claimed in claim 1, it is characterized in that, described rectification circuit comprises the diode D1, the diode D2 that are electrically connected with an ac voltage input, diode D3, and diode D4, terminal of this ac voltage input and diode D1 and diode D3 are electrically connected, another terminal of ac voltage input and diode D2 and diode D4 electric connection.
3. led controller drive unit as claimed in claim 2 is characterized in that, described ac voltage input also is electrically connected a fusible fire prevention resistance R F1, and this is fusible, and fire prevention resistance R F1 is electrically connected between diode D1 and the diode D3.
4. led controller drive unit as claimed in claim 3 is characterized in that, comprises a capacitor C 1, capacitor C 2, inductance L 1, and inductance L 2 in the described filter circuit, this inductance L 1, inductance L 2, capacitor C 1, and capacitor C 2 form a pi type filter.
5. led controller drive unit as claimed in claim 4 is characterized in that, the resistance R 1 that also is connected in parallel between described capacitor C 1 and the capacitor C 2, and resistance R 2.
6. led controller drive unit as claimed in claim 5 is characterized in that, it is the device of LNG605DG that described integrated circuit U1 adopts model.
7. led controller drive unit as claimed in claim 6 is characterized in that, comprises power switch, an oscillator in the described integrated circuit U1, reaches CC/CV control engine.
8. led controller drive unit as claimed in claim 5 is characterized in that, includes transformer T1 in the described transformer circuit, and the input of this transformer T1 armature winding one side and rectification circuit and filter circuit are electrically connected; The opposite side of transformer T1 armature winding and integrated circuit U1 are electrically connected.
9. led controller drive unit as claimed in claim 8 is characterized in that, also is electrically connected with diode D5, resistance R 3, resistance R 4 between described integrated circuit U1 and the transformer T1, reaches capacitor C 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220225273 CN202652618U (en) | 2012-05-18 | 2012-05-18 | Led controller driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220225273 CN202652618U (en) | 2012-05-18 | 2012-05-18 | Led controller driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202652618U true CN202652618U (en) | 2013-01-02 |
Family
ID=47421635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220225273 Expired - Fee Related CN202652618U (en) | 2012-05-18 | 2012-05-18 | Led controller driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202652618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302043A (en) * | 2014-09-15 | 2015-01-21 | 广东良得光电科技有限公司 | Constant-voltage and constant-current LED driving circuit based on primary side |
-
2012
- 2012-05-18 CN CN 201220225273 patent/CN202652618U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302043A (en) * | 2014-09-15 | 2015-01-21 | 广东良得光电科技有限公司 | Constant-voltage and constant-current LED driving circuit based on primary side |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140518 |