CN204465986U - High energy efficiency LED drive power circuit - Google Patents
High energy efficiency LED drive power circuit Download PDFInfo
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- CN204465986U CN204465986U CN201520156747.6U CN201520156747U CN204465986U CN 204465986 U CN204465986 U CN 204465986U CN 201520156747 U CN201520156747 U CN 201520156747U CN 204465986 U CN204465986 U CN 204465986U
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Abstract
The utility model discloses a kind of high energy efficiency LED drive power circuit, comprise high voltage source input, metal-oxide-semiconductor, earth point and PFC detection line.The utility model LED drive power circuit, when high voltage source input input 110VAC, improves efficiency.
Description
Technical field
The utility model relates to high energy efficiency LED drive power circuit.
Background technology
The efficiency of existing LED drive power circuit has much room for improvement.
Utility model content
The purpose of this utility model is to provide a kind of high energy efficiency LED drive power circuit.
For achieving the above object, the technical solution of the utility model is a kind of high energy efficiency LED drive power circuit of design, comprises high voltage source input, metal-oxide-semiconductor, earth point and PFC detection line;
Described high voltage source input connects earth point by the first branch road in parallel, the second branch road;
Described high voltage source input also connects the grid of metal-oxide-semiconductor by the 3rd branch road;
The drain electrode of described metal-oxide-semiconductor connects the first branch road by the 4th branch road;
The source electrode of described metal-oxide-semiconductor connects earth point;
Described first branch road is in series with the first resistance, the second resistance and the 3rd resistance successively by high voltage source input to earth point; Described first resistance two ends are also parallel with the first electric capacity;
Described second branch road is provided with the second electric capacity;
Described 3rd branch road is in series with the 4th resistance, the 5th resistance and voltage-stabiliser tube successively by high voltage source input to metal-oxide-semiconductor grid;
The 6th resistance, the 3rd electric capacity and the 7th resistance is also parallel with successively between described second branch road and the 3rd branch road;
Described 6th resistance is between the 5th resistance and the 3rd electric capacity;
Described voltage-stabiliser tube is between the 3rd electric capacity and the 7th resistance;
Described 4th branch road is provided with the 8th resistance;
The tie point of described 4th branch road and the first branch road is between the second resistance and the 3rd resistance;
Described PFC detection line is connected with the first branch road, and the tie point of described PFC detection line and the first branch road is between the second resistance and the 3rd resistance.
Preferably, described second electric capacity is electrochemical capacitor.
Advantage of the present utility model and beneficial effect are: provide a kind of high energy efficiency LED drive power circuit, when high voltage source input input 110VAC, improve efficiency.
AC voltage detecting circuit is formed by the 4th resistance, the 5th resistance, the 6th resistance, the 3rd electric capacity, as high voltage source input input 220VAC, metal-oxide-semiconductor conducting. by the 8th resistor coupled in parallel on the 3rd resistance; When high voltage source input input 110VAC input, metal-oxide-semiconductor not conducting, the 8th resistance is unsettled; Above-mentioned setting can change the detected value of PFC detection line voltage, and power management IC can reduce PFC output voltage according to PFC detection line voltage, improves efficiency from face.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection range of the present utility model with this.
The technical scheme that the utility model is specifically implemented is:
As shown in Figure 1, a kind of high energy efficiency LED drive power circuit, comprises high voltage source input HV+, metal-oxide-semiconductor Q1, earth point AGND and PFC detection line;
Described high voltage source input HV+ connects earth point AGND by the first branch road in parallel, the second branch road;
Described high voltage source input HV+ also connects the grid G of metal-oxide-semiconductor Q1 by the 3rd branch road;
The drain D of described metal-oxide-semiconductor Q1 connects the first branch road by the 4th branch road;
The source S of described metal-oxide-semiconductor Q1 connects earth point AGND;
Described first branch road is in series with the first resistance R1, the second resistance R2 and the 3rd resistance R3 successively by high voltage source input HV+ to earth point AGND; Described first resistance R1 two ends are also parallel with the first electric capacity C1;
Described second branch road is provided with the second electric capacity EC2;
Described 3rd branch road is in series with the 4th resistance R4, the 5th resistance R5 and voltage-stabiliser tube D1 successively by high voltage source input HV+ to metal-oxide-semiconductor Q1 grid G;
The 6th resistance R6, the 3rd electric capacity C3 and the 7th resistance R7 is also parallel with successively between described second branch road and the 3rd branch road;
Described 6th resistance R6 is between the 5th resistance R5 and the 3rd electric capacity C3;
Described voltage-stabiliser tube D1 is between the 3rd electric capacity C3 and the 7th resistance R7;
Described 4th branch road is provided with the 8th resistance R8;
The tie point of described 4th branch road and the first branch road is between the second resistance R2 and the 3rd resistance R3;
Described PFC detection line is connected with the first branch road, and the tie point of described PFC detection line and the first branch road is between the second resistance R2 and the 3rd resistance R3.
Described second electric capacity EC2 is electrochemical capacitor.
Described PFC detection line connects power management IC.
The utility model high energy efficiency LED drive power circuit, when high voltage source input HV+ inputs 110VAC, improves efficiency.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (2)
1. high energy efficiency LED drive power circuit, is characterized in that, comprises high voltage source input, metal-oxide-semiconductor, earth point and PFC detection line;
Described high voltage source input connects earth point by the first branch road in parallel, the second branch road;
Described high voltage source input also connects the grid of metal-oxide-semiconductor by the 3rd branch road;
The drain electrode of described metal-oxide-semiconductor connects the first branch road by the 4th branch road;
The source electrode of described metal-oxide-semiconductor connects earth point;
Described first branch road is in series with the first resistance, the second resistance and the 3rd resistance successively by high voltage source input to earth point; Described first resistance two ends are also parallel with the first electric capacity;
Described second branch road is provided with the second electric capacity;
Described 3rd branch road is in series with the 4th resistance, the 5th resistance and voltage-stabiliser tube successively by high voltage source input to metal-oxide-semiconductor grid;
The 6th resistance, the 3rd electric capacity and the 7th resistance is also parallel with successively between described second branch road and the 3rd branch road;
Described 6th resistance is between the 5th resistance and the 3rd electric capacity;
Described voltage-stabiliser tube is between the 3rd electric capacity and the 7th resistance;
Described 4th branch road is provided with the 8th resistance;
The tie point of described 4th branch road and the first branch road is between the second resistance and the 3rd resistance;
Described PFC detection line is connected with the first branch road, and the tie point of described PFC detection line and the first branch road is between the second resistance and the 3rd resistance.
2. high energy efficiency LED drive power circuit according to claim 1, is characterized in that, described second electric capacity is electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520156747.6U CN204465986U (en) | 2015-03-19 | 2015-03-19 | High energy efficiency LED drive power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520156747.6U CN204465986U (en) | 2015-03-19 | 2015-03-19 | High energy efficiency LED drive power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204465986U true CN204465986U (en) | 2015-07-08 |
Family
ID=53672803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520156747.6U Expired - Fee Related CN204465986U (en) | 2015-03-19 | 2015-03-19 | High energy efficiency LED drive power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204465986U (en) |
-
2015
- 2015-03-19 CN CN201520156747.6U patent/CN204465986U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20190319 |