CN203617916U - Simplified switching power supply - Google Patents
Simplified switching power supply Download PDFInfo
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- CN203617916U CN203617916U CN201320775483.3U CN201320775483U CN203617916U CN 203617916 U CN203617916 U CN 203617916U CN 201320775483 U CN201320775483 U CN 201320775483U CN 203617916 U CN203617916 U CN 203617916U
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Abstract
The utility model provides a simplified switching power supply. The simplified switching power supply comprises a housing and a circuit device; the circuit device comprises a circuit board disposed in the housing and a fan disposed on the housing; the circuit board is provided with an electromagnetic interference filter circuit, an input rectifier/filter circuit, a switch switching circuit, a transformer and an output rectifier/filter circuit which are successively in series connection from front to back, and a feedback loop formed by a detection/protection circuit, a control circuit module and a drive circuit; an input terminal of the detection/protection circuit is electrically connected with a DC output terminal of the output rectifier/filter circuit; and an output terminal of the drive circuit is electrically connected with one input terminal of the switch switching circuit. The simplified switching power supply is structurally characterized in that a power terminal of the fan is electrically connected with the DC output terminal of the output rectifier/filter circuit. A fan rectifier/filter circuit and a voltage regulator circuit which are specially used for supplying the fan with power in the prior art are saved, so that compared with the prior art, the simplified switching power supply is relatively simple in structure, cost is reduced, and working reliability is enhanced.
Description
Technical field
The utility model relates to AC-DC field of switch power, is specifically related to the reduced form Switching Power Supply that a kind of circuit structure is simplified.
Background technology
Conventionally the circuit being made up of a large amount of electronic devices and components is integrated in to circuit board such as the Switching Power Supply in the electrical equipment such as LED display, circuit board is arranged in the seal casinghousing that space is less, when its work, can produce a large amount of heats, as heat radiation not in time, will affect power source life, even cause power supply to burn because of overheated.Thereby must take technical measures to dispel the heat to Switching Power Supply.One of at present common technological means to Switching Power Supply heat radiation is provided with fan, is ventilated and realizes the object of heat radiation to circuit arrangement in Switching Power Supply by the work of fan.As shown in Figure 1, common Switching Power Supply, the normal employing of working power of its fan arranges fan rectifying filter circuit and voltage stabilizing circuit specially, from the power supply that increases by a road output transformer after fan rectifying filter circuit and voltage stabilizing circuit are processed respectively for fan provides working power.Its weak point is: the one, due to special for fan is provided with fan rectifying filter circuit and voltage stabilizing circuit, thereby increased on circuit board the difficulty of layout and production in the confined space; The 2nd, because making the functional reliability of Switching Power Supply, increasing of circuit reduce; The 3rd, increase the circuit of special drive fan, make the corresponding raising of manufacturing cost of Switching Power Supply; The 4th, increase the circuit of special drive fan, can loss power, make the efficiency step-down of Switching Power Supply.
Utility model content
The purpose of this utility model is: overcome the deficiencies in the prior art, provide a kind of omission in prior art, to aim at the reduced form Switching Power Supply that the fan rectifying filter circuit of fan power supply use simple, cost relative to voltage stabilizing circuit thereby structure, functional reliability strengthen.
The technical solution of the utility model is: reduced form Switching Power Supply of the present utility model, comprises shell and circuit arrangement; Described circuit arrangement comprises circuit board in the enclosure of setting and is arranged on the fan on shell; Circuit board is provided with electromagnetic interference filter circuit, input rectifying filter circuit, switch switching circuit, transformer, output rectifier and filter, detection/protective circuit, control circuit module and drive circuit;
Described electromagnetic interference filter circuit is provided with ac input end and output; Input rectifying filter circuit, transformer, detection/protective circuit, control circuit module and drive circuit are provided with input and output respectively; Switch switching circuit is provided with first input end, the second input and output; Output rectifier and filter is provided with input and DC output end;
The input of input rectifying filter circuit is electrically connected with the output of electromagnetic interference filter circuit; The first input end of switch switching circuit is electrically connected with the output of input rectifying filter circuit; The second input of switch switching circuit is electrically connected with the output of drive circuit; The input of transformer is electrically connected with the output of switch switching circuit; The input of output rectifier and filter is electrically connected with the output of transformer; The input of detection/protective circuit is electrically connected with the DC output end of output rectifier and filter; The input of control circuit module is electrically connected with the output of detection/protective circuit; The input of drive circuit is electrically connected with the output of control circuit module; Its design feature is:
Described fan has power end; The power end of fan is electrically connected with the DC output end of output rectifier and filter.
Further scheme is: the fan that described fan is DC driven; When the rated operational voltage of fan and output rectifier and filter work, the voltage of the DC power supply of output matches.
The utlity model has positive effect: reduced form Switching Power Supply of the present utility model, according to the fan of the corresponding operating voltage of the corresponding selection of voltage swing of the DC power supply of Switching Power Supply output, and fan is directly parallel on the output of Switching Power Supply, thereby can omit the fan rectifying filter circuit and the voltage stabilizing circuit that in prior art, aim at fan power supply use, thus its relatively simple, cost of structure, functional reliability strengthen in terms of existing technologies.
Accompanying drawing explanation
Fig. 1 is the electric theory diagram of a kind of Switching Power Supply of prior art;
Fig. 2 is electric theory diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
(embodiment 1)
See Fig. 2, the reduced form Switching Power Supply of the present embodiment, is mainly made up of shell and circuit arrangement.Circuit arrangement comprises circuit board and is arranged on the circuit on circuit board and is arranged on the fan composition on shell.Shell and circuit board do not draw in Fig. 2.
The circuit being arranged on circuit board mainly contains: electromagnetic interference filter circuit, input rectifying filter circuit, switch switching circuit, transformer, output rectifier and filter, detection/protective circuit, control circuit module and drive circuit.
Electromagnetic interference filter circuit is provided with ac input end (AC end) and output; Input rectifying filter circuit, transformer, detection/protective circuit, control circuit module and drive circuit are provided with input and output respectively; Switch switching circuit is provided with first input end, the second input and output; Output rectifier and filter is provided with input and DC output end (DC end).
The input of input rectifying filter circuit is electrically connected with the output of electromagnetic interference filter circuit; The first input end of switch switching circuit is electrically connected with the output of input rectifying filter circuit; The second input of switch switching circuit is electrically connected with the output of drive circuit; The input of transformer is electrically connected with the output of switch switching circuit; The input of output rectifier and filter is electrically connected with the output of transformer; The input of detection/protective circuit is electrically connected with the DC output end of output rectifier and filter; The input of control circuit module is electrically connected with the output of detection/protective circuit; The input of drive circuit is electrically connected with the output of control circuit module; When use, the ac input end of electromagnetic interference filter circuit connects civil power; The DC output end output DC power supply of output rectifier and filter.
Fan is provided with one.Fan adopts the fan of DC powered, and when the rated operational voltage of fan and output rectifier and filter work, the voltage of the DC power supply of output matches.
The power end of fan is electrically connected with the DC output end of output rectifier and filter.
In sum, the reduced form Switching Power Supply of the present embodiment, according to the fan of the corresponding operating voltage of the corresponding selection of voltage swing of the DC power supply of Switching Power Supply output, and fan is directly parallel on the output of Switching Power Supply, thereby can omit the fan rectifying filter circuit and the voltage stabilizing circuit that in prior art, aim at fan power supply use, thus its relatively simple, cost of structure, functional reliability strengthen in terms of existing technologies.
Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not in the situation that departing from spirit and scope of the present utility model; can also make various conversion and variation and obtain the corresponding technical scheme being equal to, therefore all technical schemes that are equal to all should be included into scope of patent protection of the present utility model.
Claims (2)
1. a reduced form Switching Power Supply, comprises shell and circuit arrangement; Described circuit arrangement comprises circuit board in the enclosure of setting and is arranged on the fan on shell; Circuit board is provided with electromagnetic interference filter circuit, input rectifying filter circuit, switch switching circuit, transformer, output rectifier and filter, detection/protective circuit, control circuit module and drive circuit;
Described electromagnetic interference filter circuit is provided with ac input end and output; Input rectifying filter circuit, transformer, detection/protective circuit, control circuit module and drive circuit are provided with input and output respectively; Switch switching circuit is provided with first input end, the second input and output; Output rectifier and filter is provided with input and DC output end;
The input of input rectifying filter circuit is electrically connected with the output of electromagnetic interference filter circuit; The first input end of switch switching circuit is electrically connected with the output of input rectifying filter circuit; The second input of switch switching circuit is electrically connected with the output of drive circuit; The input of transformer is electrically connected with the output of switch switching circuit; The input of output rectifier and filter is electrically connected with the output of transformer; The input of detection/protective circuit is electrically connected with the DC output end of output rectifier and filter; The input of control circuit module is electrically connected with the output of detection/protective circuit; The input of drive circuit is electrically connected with the output of control circuit module; It is characterized in that:
Described fan has power end; The power end of fan is electrically connected with the DC output end of output rectifier and filter.
2. reduced form Switching Power Supply according to claim 1, is characterized in that: the fan that described fan is DC driven; When the rated operational voltage of fan and output rectifier and filter work, the voltage of the DC power supply of output matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320775483.3U CN203617916U (en) | 2013-11-29 | 2013-11-29 | Simplified switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320775483.3U CN203617916U (en) | 2013-11-29 | 2013-11-29 | Simplified switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617916U true CN203617916U (en) | 2014-05-28 |
Family
ID=50770535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320775483.3U Expired - Fee Related CN203617916U (en) | 2013-11-29 | 2013-11-29 | Simplified switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617916U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995251A (en) * | 2019-04-02 | 2019-07-09 | 童芸芸 | A kind of indifference formula power supply of ring network cabinet dehumidification system |
-
2013
- 2013-11-29 CN CN201320775483.3U patent/CN203617916U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995251A (en) * | 2019-04-02 | 2019-07-09 | 童芸芸 | A kind of indifference formula power supply of ring network cabinet dehumidification system |
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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 |
Granted publication date: 20140528 Termination date: 20191129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |