CN2798412Y - Readiness circuit for switch electric source - Google Patents
Readiness circuit for switch electric source Download PDFInfo
- Publication number
- CN2798412Y CN2798412Y CNU2005200334225U CN200520033422U CN2798412Y CN 2798412 Y CN2798412 Y CN 2798412Y CN U2005200334225 U CNU2005200334225 U CN U2005200334225U CN 200520033422 U CN200520033422 U CN 200520033422U CN 2798412 Y CN2798412 Y CN 2798412Y
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- power supply
- circuit
- switching
- switching power
- stand
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Abstract
The utility model relates to a switching power supply, particularly a switching stand-by power supply circuit. The utility model discloses a switching stand-by power supply circuit and has the technical schemes that the switching stand-by power supply circuit comprises a first power supply and a second power supply. The utility model is characterized in that the second power supply is connected with the sampling end of the switching power supply through a switching circuit, and the control end of the switching circuit is connected with stand-by signals. The utility model has the advantages of simple circuit structure, low cost, lower stand-by power consumption of the switching power supply and high reliability of the switching power supply. The utility model is especially suitable for the stand-by power supply circuits of household appliances.
Description
Technical field
The utility model relates to Switching Power Supply, particularly a kind of Switch Power Treat Electromechanical Way.
Background technology
Switching Power Supply is that a kind of adaptation voltage range is wide, and capacity is big, and volume is little, the power supply that efficient is high.Use very generally, particularly enjoy favor in household appliance technical field.General Switching Power Supply all has many group outputs, comprises first power supply (V1) and second source (V2).When Switching Power Supply was in normal operating conditions, V2 inserted the Switching Power Supply sampling end by bleeder circuit, and Switching Power Supply is according to controlling its output voltage to the sampled voltage of V2, and V2 powers to system central processor (CPU) by pressurizer simultaneously.When Switching Power Supply was in holding state, prior art was to reduce output voltage by switch sampling voltage, reached the purpose that reduces stand-by power consumption.When power supply entered holding state, lower voltage V1 was access in the Switching Power Supply sampling end, and Switching Power Supply reaches the purpose that reduces output voltage by to its controlling of sampling output voltage, and this moment, the power supply of CPU was provided by V1.The Switching Power Supply typical circuit of prior art is seen Fig. 1.The stand-by circuit of prior art, though reached the purpose that reduces stand-by power consumption, its major defect is, the circuit structure more complicated, cost is higher, and reliability is relatively poor.
The utility model content
Technical problem to be solved in the utility model is exactly at existing Switch Power Treat Electromechanical Way more complicated, and the higher and relatively poor shortcoming of reliability of cost provides a kind of circuit simpler, and cost is lower, the Switch Power Treat Electromechanical Way that reliability is higher.
The utility model solves its technical problem, and the technical scheme of employing is that Switch Power Treat Electromechanical Way comprises first power supply and second source, it is characterized in that: described second source is connected with the Switching Power Supply sampling end by commutation circuit; Described commutation circuit control end is connected with standby signal.
The beneficial effects of the utility model are, circuit structure is simple, and cost is low, has reduced the Switching Power Supply stand-by power consumption, has improved the reliability of Switching Power Supply.
Description of drawings
Fig. 1 is prior art switching power circuit figure;
Fig. 2 is the circuit diagram of embodiment.
Embodiment
Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.
The technical solution of the utility model is improved the Switching Power Supply standby mode of prior art.Utilize standby signal control commutation circuit, second source is connected with the Switching Power Supply sampling end by commutation circuit.When power supply was in holding state, second source was access in sampling end, made Switching Power Supply be in two sampling configurations, had reduced the voltage of sampling end.Sampled voltage passes through the output voltage of feedback control for networked control Switching Power Supply, thereby the output voltage of Switching Power Supply is reduced, and reaches the purpose that reduces stand-by power consumption.Because the change of circuit formula makes stand-by circuit become simpler, reduce circuit cost simultaneously, increased the reliability of power supply.
Embodiment
This routine Switch Power Treat Electromechanical Way as shown in Figure 2.In Fig. 2 circuit, it is V1 that Switching Power Supply is exported first voltage, and second voltage is V2, and V2＞V1.Resistance R 4, R6 are bleeder circuit among the figure, and the first power supply V1 arrives ground by resistance R 4, R6; The Switching Power Supply sampling end is connected with R6 with resistance R 4; Second source V2 is connected with triode N3 collector electrode by resistance R 5; Triode N3 grounded emitter, triode N3 base stage links to each other with standby signal by the biasing circuit that resistance R 8, R7 form; Diode D1 is anodal to be connected with triode N3 collector electrode, and negative pole is connected with the Switching Power Supply sampling end.
The operation principle of Fig. 2 circuit is: when standby signal was high level, Switching Power Supply was in normal operating conditions, and this moment, triode N3 was in conducting state, and diode D1 ends, and the Switching Power Supply sampling end is only sampled to V1.When Switching Power Supply entered holding state, standby signal was a low level, and triode N3 ends, diode D1 conducting, and V2 is access in sampling end by resistance R 5, and Switching Power Supply is in two sampling configurations.Because V1 is no longer for CPU provides operating voltage, the V1 in the time of can be with standby designs lowlyer.Guaranteeing that the V2 output voltage satisfies under the condition of CPU job requirement, by the resistance of suitable selection resistance R 5, it is lower that sampled voltage Vf is obtained, and can reduce Switching Power Supply standby voltage equally, reduces stand-by power consumption.But the used components and parts of circuit are less, and structure is simpler, and reliability is higher.
For the circuit form of different Switching Power Supplies, use basic technique principle of the present utility model, can design different circuit, reach same purpose, it all belongs to protection range of the present utility model.
Claims (3)
1. Switch Power Treat Electromechanical Way comprises first power supply and second source, it is characterized in that: described second source is connected with the Switching Power Supply sampling end by commutation circuit; Described commutation circuit control end is connected with standby signal.
2. Switch Power Treat Electromechanical Way according to claim 1 is characterized in that: described second source voltage is higher than described first supply voltage.
3. Switch Power Treat Electromechanical Way according to claim 2 is characterized in that: described commutation circuit comprises resistance (R5), triode (N3), diode (D1); Described resistance (R5) end is connected with second source, and the other end is connected with triode (N3) collector electrode; Triode (N3) base stage reception machine signal, grounded emitter; Diode (D1) is anodal to be connected with triode (N3) collector electrode, and negative pole is connected with the Switching Power Supply sampling end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200334225U CN2798412Y (en) | 2005-03-10 | 2005-03-10 | Readiness circuit for switch electric source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200334225U CN2798412Y (en) | 2005-03-10 | 2005-03-10 | Readiness circuit for switch electric source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2798412Y true CN2798412Y (en) | 2006-07-19 |
Family
ID=36869662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200334225U Expired - Fee Related CN2798412Y (en) | 2005-03-10 | 2005-03-10 | Readiness circuit for switch electric source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2798412Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843051A (en) * | 2012-08-24 | 2012-12-26 | 天津三星电子有限公司 | Power adapter |
-
2005
- 2005-03-10 CN CNU2005200334225U patent/CN2798412Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843051A (en) * | 2012-08-24 | 2012-12-26 | 天津三星电子有限公司 | Power adapter |
| CN102843051B (en) * | 2012-08-24 | 2016-02-03 | 天津三星电子有限公司 | Power supply adaptor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangdong Changhong Electronics Co., Ltd. Assignor: Sichuan Changhong Electrical Appliance Co., Ltd. Contract fulfillment period: 2006.8.18 to 2012.8.18 Contract record no.: 2008440000476 Denomination of utility model: Readiness circuit for switch electric source Granted publication date: 20060719 License type: Exclusive license Record date: 20081211 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2006.8.18 TO 2012.8.18; CHANGE OF CONTRACT Name of requester: GUANGDONG CHANGHONG ELECTRONICS CO., LTD. Effective date: 20081211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060719 Termination date: 20140310 |