CN202309043U - Switch power supply and reinforced insulating protection circuit thereof - Google Patents
Switch power supply and reinforced insulating protection circuit thereof Download PDFInfo
- Publication number
- CN202309043U CN202309043U CN2011204416588U CN201120441658U CN202309043U CN 202309043 U CN202309043 U CN 202309043U CN 2011204416588 U CN2011204416588 U CN 2011204416588U CN 201120441658 U CN201120441658 U CN 201120441658U CN 202309043 U CN202309043 U CN 202309043U
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- power supply
- voltage
- switching power
- optocoupler
- resistance
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Abstract
The utility model discloses a switch power supply and a reinforced insulating protection circuit thereof. The reinforced insulating protection circuit of the switch power supply comprises a resistor and a voltage-regulator tube which are serially connected, wherein the first terminal of the resistor is connected with a feedback function pin of the control chip in the switch power supply; the second terminal of the resistor is connected with the anode of the voltage-regulator tube and the fourth pin of an optical coupler in the switch power supply; the resistor adopts 0603 packaging size; the voltage-regulator tube is connected with the secondary of the optical coupler in parallel; the anode of the voltage-regulator tube is connected with the second terminal of the resistor and the fourth pin of the optical coupler; and the cathode of the voltage-regulator tube is connected with the third pin of the optical coupler. The switch power supply of the utility model can meet the requirements of UL8750 and UL60950 for safety standard insulating strength.
Description
Technical field
The utility model relates to power technique fields, relates in particular to Switching Power Supply and reinforced insulation protective circuit thereof.
Background technology
Along with the fast development of LED (Light Emitting Diode, light-emitting diode) driving power, the importance of various security regulations causes the great attention of numerous producers, drops into more research and development energy, and obtaining various safety certifications becomes the admission card that comes into the market.Continuing to bring out of new technology, market competition are developed to specialized, highly reliable, high-level direction day by day.
In the prior art, the Switching Power Supply that is realized by traditional feedback control circuit can not satisfy the requirement of UL8750+UL60950 safety standard dielectric strength under single failure.
Fig. 1 is a kind of principle schematic of the Switching Power Supply that is realized by traditional feedback control circuit.As shown in Figure 1; In traditional feedback control circuit; Be that optocoupler V2 forms current circuit through resistance R 1 and the Primary Component that influences dielectric strength only, optocoupler V2 is not protected like this, and resistance R 1 package dimension is bigger in simultaneously traditional feedback control circuit; Usually adopt the package dimension of 0805 (2.0mm*1.2mm), prolonged the harm time of optocoupler V2 like this.In case break down; Control chip in the Switching Power Supply; The inside that like FSFR2100 is N2 among Fig. 1 is with high pressure input pin (first pin) and feedback function pin (crus secunda) short circuit, and high pressure makes the output of optocoupler V2 receive impacting with high pressure through resistance R 1 and optocoupler V2 branch road; The produced simultaneously big electric current optocoupler V2 that flows through damages optocoupler V2.In case optocoupler V2 damages, and then can not satisfy the requirement of UL8750+UL60950 safety standard dielectric strength, the safety of products quality can not get guaranteeing.
The utility model content
The utility model embodiment provides a kind of reinforced insulation protective circuit of Switching Power Supply, and in order to realize that Switching Power Supply under single failure, still can satisfy the requirement of UL8750+UL60950 safety standard dielectric strength, this circuit comprises:
Resistance that is connected in series and voltage-stabiliser tube;
First end of said resistance is connected with the feedback function pin of control chip in the Switching Power Supply, and second end of said resistance is connected with the 4th pin of optocoupler in the Switching Power Supply with the anode of said voltage-stabiliser tube; Said resistance adopts 0603 package dimension;
Said voltage-stabiliser tube is parallel to the secondary of said optocoupler, and wherein, the anode of said voltage-stabiliser tube is connected with second end of said resistance and the 4th pin of said optocoupler, and the negative electrode of said voltage-stabiliser tube is connected with the tripod of said optocoupler.
Among the embodiment, said control chip is FSFR2100, NCP1396 or L6599.
Among the embodiment, when said control chip was FSFR2100, said feedback function pin was the crus secunda of FSFR2100.
The utility model embodiment also provides a kind of Switching Power Supply, and in order to realize that Switching Power Supply under single failure, still can satisfy the requirement of UL8750+UL60950 safety standard dielectric strength, this Switching Power Supply comprises:
The reinforced insulation protective circuit of control chip, optocoupler and above-mentioned Switching Power Supply.
Among the utility model embodiment, when the high pressure input pin of control chip in the Switching Power Supply and feedback function pin because during the fault generating short circuit, owing to above-mentioned resistance is arranged and be connected in parallel on the secondary above-mentioned voltage-stabiliser tube of optocoupler in the Switching Power Supply; Make its energy through this resistance and voltage-stabiliser tube branch road; Resistance is burnt, play the not impaired effect of protection optocoupler, simultaneously; Because voltage-stabiliser tube carries out voltage clamp with the output of optocoupler, optocoupler can not be broken down by high-voltage.Like this, can realize Switching Power Supply under single failure, be that optocoupler is effectively protected to the Primary Component that influences dielectric strength in the Switching Power Supply, thereby satisfy the requirement of UL8750+UL60950 safety standard dielectric strength, promote the safety of products quality.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.In the accompanying drawings:
Fig. 1 is the principle schematic of the Switching Power Supply that traditional feedback control circuit is realized in the prior art;
Fig. 2 is for having the principle schematic of the Switching Power Supply of reinforced insulation protective circuit among the utility model embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment is clearer, the utility model embodiment is explained further details below in conjunction with accompanying drawing.At this, illustrative examples of the utility model and explanation thereof are used to explain the utility model, but not as the qualification to the utility model.
In order to realize Switching Power Supply under single failure, still can satisfy the requirement of UL8750+UL60950 safety standard dielectric strength, the utility model embodiment is that optocoupler carries out the reinforced insulation protection to the Primary Component that influences dielectric strength in the Switching Power Supply.
The utility model embodiment provides a kind of reinforced insulation protective circuit of Switching Power Supply, and this circuit comprises:
Resistance that is connected in series and voltage-stabiliser tube; Wherein:
First end of resistance is connected with the feedback function pin of control chip in the Switching Power Supply, and second end of resistance is connected with the 4th pin of optocoupler in the Switching Power Supply with the anode of voltage-stabiliser tube; Resistance adopts 0603 package dimension;
Voltage-stabiliser tube is parallel to the secondary of optocoupler, and wherein, the anode of voltage-stabiliser tube is connected with second end of resistance and the 4th pin of optocoupler, and the negative electrode of voltage-stabiliser tube is connected with the tripod of optocoupler.
The utility model embodiment also provides a kind of Switching Power Supply, and this Switching Power Supply comprises: the reinforced insulation protective circuit of control chip, optocoupler and above-mentioned Switching Power Supply.
During practical implementation, the control chip in the Switching Power Supply can be FSFR2100, and this moment, its feedback function pin was a crus secunda, i.e. CON feedback function pin.Control chip in the Switching Power Supply also can be other chips of the same type, like NCP1396, L6599 etc.
Fig. 2 is for having the principle schematic of the Switching Power Supply of reinforced insulation protective circuit among the utility model embodiment.As shown in Figure 2; If the control chip in the Switching Power Supply adopts FSFR2100 (being N2 among Fig. 2); Optocoupler in the Switching Power Supply adopts PC817 (being V2 among Fig. 2), is the reinforced insulation protective circuit of above-mentioned Switching Power Supply in the frame of broken lines, comprising resistance R that is connected in series 1 and voltage-stabiliser tube V1.First end of resistance R 1 is that crus secunda is connected with the CON feedback function pin of FSFR2100, and second end of resistance R 1 is connected with the 4th pin of the anode of voltage-stabiliser tube V1 and optocoupler V2; Resistance R 1 adopts 0603 package dimension; Voltage-stabiliser tube V1 is parallel to the secondary of optocoupler V2, and wherein, the anode of voltage-stabiliser tube V1 is connected with second end of resistance R 1 and the 4th pin of optocoupler V2, and the negative electrode of voltage-stabiliser tube V1 is connected with the tripod of optocoupler V2.
Above-described specific embodiment; Purpose, technical scheme and beneficial effect to the utility model have carried out further explain, it should be understood that the above is merely the specific embodiment of the utility model; And be not used in the protection range that limits the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (4)
1. the reinforced insulation protective circuit of a Switching Power Supply is characterized in that, comprising:
Resistance that is connected in series and voltage-stabiliser tube;
First end of said resistance is connected with the feedback function pin of control chip in the Switching Power Supply, and second end of said resistance is connected with the 4th pin of optocoupler in the Switching Power Supply with the anode of said voltage-stabiliser tube; Said resistance adopts 0603 package dimension;
Said voltage-stabiliser tube is parallel to the secondary of said optocoupler, and wherein, the anode of said voltage-stabiliser tube is connected with second end of said resistance and the 4th pin of said optocoupler, and the negative electrode of said voltage-stabiliser tube is connected with the tripod of said optocoupler.
2. the reinforced insulation protective circuit of Switching Power Supply as claimed in claim 1 is characterized in that, said control chip is FSFR2100, NCP1396 or L6599.
3. the reinforced insulation protective circuit of Switching Power Supply as claimed in claim 1 is characterized in that, when said control chip was FSFR2100, said feedback function pin was the crus secunda of FSFR2100.
4. a Switching Power Supply is characterized in that, comprising:
The reinforced insulation protective circuit of control chip, optocoupler and each described Switching Power Supply of claim 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204416588U CN202309043U (en) | 2011-11-09 | 2011-11-09 | Switch power supply and reinforced insulating protection circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204416588U CN202309043U (en) | 2011-11-09 | 2011-11-09 | Switch power supply and reinforced insulating protection circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309043U true CN202309043U (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204416588U Expired - Fee Related CN202309043U (en) | 2011-11-09 | 2011-11-09 | Switch power supply and reinforced insulating protection circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309043U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109874372A (en) * | 2016-08-29 | 2019-06-11 | 斯兰纳亚洲有限公司 | Switched-mode power supply with anti saturation circuit |
| US11984810B2 (en) | 2023-02-15 | 2024-05-14 | Appulse Power Inc. | Switching mode power supply with a voltage clamping circuit |
-
2011
- 2011-11-09 CN CN2011204416588U patent/CN202309043U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109874372A (en) * | 2016-08-29 | 2019-06-11 | 斯兰纳亚洲有限公司 | Switched-mode power supply with anti saturation circuit |
| CN109874372B (en) * | 2016-08-29 | 2021-11-02 | 阿帕尔斯电力股份有限公司 | Switched mode power supply with anti-saturation circuit |
| US11271485B2 (en) | 2016-08-29 | 2022-03-08 | Appulse Power Inc. | Switching mode power supply with a voltage clamping circuit |
| US11621641B2 (en) | 2016-08-29 | 2023-04-04 | Appulse Power Inc. | Switching mode power supply with a voltage clamping circuit |
| US11984810B2 (en) | 2023-02-15 | 2024-05-14 | Appulse Power Inc. | Switching mode power supply with a voltage clamping circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Switch power supply and reinforced insulating protection circuit thereof Effective date of registration: 20150618 Granted publication date: 20120704 Pledgee: Beijing technology business factoring Ltd. Pledgor: Beijing Tonlier Energy-saving LLC. Registration number: 2015990000483 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20171109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |