CN203883679U - LED switching power source controller integrated circuit - Google Patents
LED switching power source controller integrated circuit Download PDFInfo
- Publication number
- CN203883679U CN203883679U CN201420139367.7U CN201420139367U CN203883679U CN 203883679 U CN203883679 U CN 203883679U CN 201420139367 U CN201420139367 U CN 201420139367U CN 203883679 U CN203883679 U CN 203883679U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- connects
- integrated circuit
- controller integrated
- circuit
- 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 - Fee Related
Links
Landscapes
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The utility model belongs to the technical field of switch power sources and relates to an LED switching power source controller integrated circuit. The LED switching power source controller integrated circuit includes an EMI filtering circuit connected with alternating current, a rectifier bridge, a CBB capacitor C1 and a power factor correction circuit, a PWM control chip and a switching transformer. The LED switching power source controller integrated circuit has the advantages of high efficiency and reasonability.
Description
Technical field
The utility model relates to switch power technology field, relates in particular to LED switch power controller integrated circuit.
Background technology
LED, as novel energy-conserving light source, has the features such as light efficiency is high, environmental protection, life-span length.It is that power supply supply is converted to specific electric current and voltage with the luminous power supply changeover device of driving LED that LED needs the driving power LED driving power of constant current output while using, generally, the input of LED driving power comprises high pressure industrial frequency AC (being civil power), low-voltage direct, high voltage direct current, low pressure high-frequency ac etc.LED driving power belongs to Switching Power Supply, and the quality and reliability of Switching Power Supply depends on its circuit design, production technology, and the quality of device, and meanwhile, LED driving power directly affects the useful life of LED.Yet often there is the shortcoming of inefficient and unreasonable circuit structure in existing LED driving power.
Summary of the invention
The purpose of this utility model is to provide for the deficiencies in the prior art a kind of high efficiency and rational LED switch power controller integrated circuit.
For achieving the above object, the utility model adopts following technical scheme: LED switch power controller integrated circuit, it comprises the EMI filter circuit that connects alternating current, and rectifier bridge, CBB capacitor C 1, circuit of power factor correction, pwm chip and switch transformer; Described switch transformer comprises switching tube Q1, armature winding N1, secondary winding N2, rectifier diode VD1, capacitor C 2, resistance R 3 and capacitor C 7, described secondary winding N2 connects rectifier diode VD1 and capacitor C 2, and described resistance R 3 and capacitor C 7 are in parallel with rectifier diode VD1; The output of described EMI filter circuit connects the input of rectifier bridge, the output of rectifier bridge connects respectively CBB capacitor C 1, circuit of power factor correction and armature winding N1, the drain electrode of armature winding N1 connecting valve pipe Q1, is connected with sampling resistor R2 between the source electrode of switching tube Q1 and ground; The output contact resistance R1 of rectifier bridge, resistance R 1 connects pwm chip so that starting current to be provided, the grid of the pulse output end connecting valve pipe Q1 of pwm chip.
Further, the input of described EMI filter circuit is connected with fuse F1, and fuse F1 connects alternating current.
Further, the input of described EMI filter circuit is connected with thermistor RT1, and thermistor RT1 connects alternating current.
The utility model beneficial effect is: LED switch power controller integrated circuit described in the utility model comprises the EMI filter circuit that connects alternating current, and rectifier bridge, CBB capacitor C 1, circuit of power factor correction, pwm chip and switch transformer, there is the rational advantage of high efficiency and circuit.
Accompanying drawing explanation
Accompanying drawing 1 is schematic block circuit diagram of the present utility model.
Accompanying drawing 2 is switch transformer circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described: as depicted in figs. 1 and 2, LED switch power controller integrated circuit described in the utility model, it comprises the EMI filter circuit that connects alternating current, and rectifier bridge, CBB capacitor C 1, circuit of power factor correction, pwm chip and switch transformer; Described switch transformer comprises switching tube Q1, armature winding N1, secondary winding N2, rectifier diode VD1, capacitor C 2, resistance R 3 and capacitor C 7, described secondary winding N2 connects rectifier diode VD1 and capacitor C 2, and described resistance R 3 and capacitor C 7 are in parallel with rectifier diode VD1; The output of described EMI filter circuit connects the input of rectifier bridge, the output of rectifier bridge connects respectively CBB capacitor C 1, circuit of power factor correction and armature winding N1, the drain electrode of armature winding N1 connecting valve pipe Q1, is connected with sampling resistor R2 between the source electrode of switching tube Q1 and ground; The output contact resistance R1 of rectifier bridge, resistance R 1 connects pwm chip so that starting current to be provided, the grid of the pulse output end connecting valve pipe Q1 of pwm chip.Further, the input of described EMI filter circuit is connected with fuse F1, and fuse F1 connects alternating current.
Preferably, the input of described EMI filter circuit is connected with thermistor RT1, thermistor RT1 connects alternating current, thermistor RT1 can prevent that surge current from causing damage to device below, when power supply is not also switched on, the resistance of thermistor RT1 is very large, so can play the effect of limit inrush currents, after the normal work of circuit, thermistor RT1 is owing to there being electric current to pass through to generate heat, cause resistance can become very little, so after normal work, the power loss of thermistor RT1 is very little.
During work, after alternating current input circuit, after fuse and the rectification of EMI filter circuit, through passing through again 1 filtering of CBB capacitor C after rectifier bridge filtering, then pass through circuit of power factor correction, power factor is improved.Electric current arrives ground through armature winding N1, switching tube Q1 and sampling resistor R2 afterwards, forms the major loop of power input.By the electric current of control major loop, realize constant current and control, concrete method is, by sampling resistor R2, the current signal of input is converted into voltage signal, and the duty that feeds back to the pin adjustment chip output pulse of pwm chip is recently realized.The core that power supply is realized constant current control is pwm chip, and resistance R 1 connects pwm chip so that starting current to be provided.The grid of the pulse output end of pwm chip and switching tube Q1, with conducting and the cut-off of the grid of control switch pipe Q1.Input voltage is through after switch transformer transformation, through being exported by capacitor C 2 filtering after supper-fast recovery rectifier diode VD1 rectification again.Because rectifier diode VD1 is in the on off state of high frequency when the circuit working, resistance R 3 and capacitor C 7 produce vibration with avoiding rectifier diode VD1.LED switch power controller integrated circuit described in the utility model has high efficiency and the rational advantage of circuit.
The above is only better embodiment of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (3)
1.LED switch power controller integrated circuit, is characterized in that: it comprises the EMI filter circuit that connects alternating current, and rectifier bridge, CBB capacitor C 1, circuit of power factor correction, pwm chip and switch transformer; Described switch transformer comprises switching tube Q1, armature winding N1, secondary winding N2, rectifier diode VD1, capacitor C 2, resistance R 3 and capacitor C 7, described secondary winding N2 connects rectifier diode VD1 and capacitor C 2, and described resistance R 3 and capacitor C 7 are in parallel with rectifier diode VD1; The output of described EMI filter circuit connects the input of rectifier bridge, the output of rectifier bridge connects respectively CBB capacitor C 1, circuit of power factor correction and armature winding N1, the drain electrode of armature winding N1 connecting valve pipe Q1, is connected with sampling resistor R2 between the source electrode of switching tube Q1 and ground; The output contact resistance R1 of rectifier bridge, resistance R 1 connects pwm chip so that starting current to be provided, the grid of the pulse output end connecting valve pipe Q1 of pwm chip.
2. LED switch power controller integrated circuit according to claim 1, is characterized in that: the input of described EMI filter circuit is connected with fuse F1, and fuse F1 connects alternating current.
3. LED switch power controller integrated circuit according to claim 1, is characterized in that: the input of described EMI filter circuit is connected with thermistor RT1, and thermistor RT1 connects alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139367.7U CN203883679U (en) | 2014-03-26 | 2014-03-26 | LED switching power source controller integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139367.7U CN203883679U (en) | 2014-03-26 | 2014-03-26 | LED switching power source controller integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203883679U true CN203883679U (en) | 2014-10-15 |
Family
ID=51684143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420139367.7U Expired - Fee Related CN203883679U (en) | 2014-03-26 | 2014-03-26 | LED switching power source controller integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203883679U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944394A (en) * | 2014-03-26 | 2014-07-23 | 东莞市冠日光电科技有限公司 | LED switching power supply controller integrated circuit |
-
2014
- 2014-03-26 CN CN201420139367.7U patent/CN203883679U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944394A (en) * | 2014-03-26 | 2014-07-23 | 东莞市冠日光电科技有限公司 | LED switching power supply controller integrated circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203206508U (en) | Novel LED lamp driving circuit | |
| CN202857066U (en) | Novel high-power LED isolation constant-current driving circuit composed by discrete components | |
| CN203734894U (en) | LED drive circuit | |
| CN203883679U (en) | LED switching power source controller integrated circuit | |
| CN202857065U (en) | Novel LED isolation constant-current drive circuit having active power factor correction function | |
| CN103747567A (en) | LED light source constant-current driving circuit | |
| CN203590550U (en) | Large-power LED lamp realized by adopting voltage-isolated fly-back controller | |
| CN203775459U (en) | LED driver convenient to adjust output current | |
| CN103944394A (en) | LED switching power supply controller integrated circuit | |
| CN201766513U (en) | Switch power with zero-crossing detection of pulper | |
| CN203884030U (en) | LED switching power source adopting primary side control technology | |
| CN204442775U (en) | A kind of controllable silicon light modulation LED drive circuit with compensating circuit | |
| CN204206576U (en) | A kind of LED drive power circuit | |
| CN203884032U (en) | Primary side feedback LED driving circuit | |
| CN103105555B (en) | Aging of product proving installation | |
| CN103369792A (en) | LED drive circuit | |
| CN105245107A (en) | Current type AC power converter | |
| CN204168566U (en) | A kind of LED drive circuit | |
| CN204425197U (en) | For the electromagnetic interference denoising device of former limit sampling LED control system | |
| CN204145801U (en) | LED drive power | |
| CN204053198U (en) | The two arc of a kind of submerge arc stablizes handover control system | |
| CN203015238U (en) | Off-line LED driving power supply | |
| CN204046865U (en) | A kind of high-efficiency separated LED drive circuit | |
| CN203072219U (en) | LED driving power supply | |
| CN203884031U (en) | LED constant current driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20150326 |
|
| EXPY | Termination of patent right or utility model |