CN202142902U - Low power charger - Google Patents
Low power charger Download PDFInfo
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- CN202142902U CN202142902U CN201120228279U CN201120228279U CN202142902U CN 202142902 U CN202142902 U CN 202142902U CN 201120228279 U CN201120228279 U CN 201120228279U CN 201120228279 U CN201120228279 U CN 201120228279U CN 202142902 U CN202142902 U CN 202142902U
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Abstract
The utility model relates to the power supply field, specifically relating to a low power charger comprising an AC (alternating current) input terminal L, an AC input terminal N, a protective tube F1, a primary rectifier circuit unit, a filter circuit unit, an inverter circuit unit, a secondary rectifier filter circuit unit, a DC (direct current) output terminal V+ and a DC output terminal V-, wherein the inverter circuit unit mainly includes a transformer T1 and a chip U1; and the transformer T1 is a specific design which makes the low power charger provided by the utility model pass an EMI (electro-magnetic interference) test with no requirements for Y capacitance and a primary clamping circuit and has the advantages of simple circuit and low cost, thus realizing miniaturization and lightweight of a charger.
Description
Technical field
The utility model relates to field of power supplies, particularly relates to a kind of small-power charger.
Background technology
Because the continuous development and the customer requirements of technology improve day by day, the miniaturization of electronic equipment forward, lightweight development, therefore, miniaturization, light-weighted electronic equipment charger also receive user's favor deeply.
In the prior art, general small-power charger all is to adopt secondary feedback, several resistance, electric capacity that secondary feedback generally need use TL431, optocoupler and mate with TL431, optocoupler; The making of employed transformer all is to twine primary coil earlier; Then twine secondary coil; Just twine feedback coil at last, and the winding of all coils all is same direction, uses the charger circuit of this design of transformer; For through EMI test, generally all must in circuit, increase Y electric capacity and elementary clamp circuit is realized.The components and parts that the sort circuit design causes circuit to use are many, and charger can not be realized miniaturization and light-weighted requirement, and has increased cost.
Therefore, to the problem that exists in the prior art, needing badly provides a kind of circuit simple, saves cost, realizes miniaturization and light-weighted small-power charger.
Summary of the invention
The purpose of the utility model is to avoid weak point of the prior art and a kind of small-power charger is provided; This small-power charger need not use Y electric capacity and elementary clamp circuit just can test through EMI; Circuit is simple, saves cost, thereby realizes miniaturization and lightweight.
The purpose of the utility model realizes through following technical measures.
A kind of small-power charger is provided, comprises ac input end L, ac input end N, protective tube F1, elementary rectification circuit unit, filter circuit unit, inverter circuit unit, secondary commutation filter circuit unit, dc output end V+ and dc output end V-;
Said ac input end L is electrically connected with said elementary rectification circuit unit through protective tube F1; Said ac input end N is electrically connected with said elementary rectification circuit unit; Said elementary rectification circuit unit, filter circuit unit, inverter circuit unit and secondary commutation filter circuit unit are electrically connected successively, and said secondary commutation filter circuit unit is electrically connected said dc output end V+ and dc output end V-;
Said inverter circuit unit comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 6A, resistance R 7, capacitor C 3, capacitor C 4, capacitor C 5, diode D5, diode D6, transformer T1 and chip U1; Said resistance R 2 one ends connect said filter circuit unit, transformer T1 the 1st pin; Resistance R 2 other ends connect capacitor C 3 positive poles, diode D5 negative pole, chip U1 the 3rd pin, and capacitor C 3 negative poles connect power supply ground, and transformer T1 the 2nd pin connects chip U1 the 5th pin, chip U1 the 6th pin; Transformer T1 the 9th pin connects diode D6 positive pole, resistance R 7 one ends; Diode D6 negative pole connects capacitor C 5 one ends, secondary commutation filter circuit unit, and resistance R 7 other ends connect capacitor C 5 other ends, and transformer T1 the 6th pin connects secondary commutation filter circuit unit; Anodal resistance R 3 one ends that connect of diode D5; Resistance R 3 other ends connect resistance R 5 one ends, transformer T1 the 5th pin, and transformer T1 the 4th pin connects power supply ground, and resistance R 5 other ends connect resistance R 6 one ends, resistance R 6A one end, transformer U1 the 2nd pin; Resistance R 6 other ends, the resistance R 6A other end connect power supply ground; Transformer U1 the 8th pin connects power supply ground, and capacitor C 4 is connected between chip U1 the 1st pin and the power supply ground, and resistance R 4 is connected between chip U1 the 4th pin and the power supply ground.
As preferred implementation, said elementary rectification circuit unit comprises rectifier bridge, and said filter circuit unit comprises capacitor C 1, capacitor C 2, inductance L 1, inductance L 2, and said secondary commutation filter circuit unit comprises capacitor C 6 and resistance R 8; Said protective tube F1 is connected between ac input end L and rectifier bridge the 2nd pin; Ac input end N connects said rectifier bridge the 3rd pin; Said rectifier bridge the 4th pin connects inductance L 1 one ends, capacitor C 1 positive pole; Said rectifier bridge the 1st pin connects capacitor C 1 negative pole, inductance L 2 one ends, and inductance L 1 other end connects resistance R 2 one ends of capacitor C 2 positive poles, inverter circuit unit, and inductance L 2 other ends connect capacitor C 2 negative poles, power supply ground; T1 the 6th pin of inverter circuit unit connects capacitor C 6 negative poles, resistance R 8 other ends, dc output end V-.
Further, the model of said U1 is AP3968.
Further; Said transformer T1 comprises skeleton, magnetic core, the first line bag, the second line bag, three-way bag and the 4th line bag; It is inner that said magnetic core is positioned over said skeleton; The said first line bag, the second line bag, three-way bag and the 4th line looping are around on the said skeleton, and said skeleton is provided with and has fed back line end, feedback take-up end, elementary line end, elementary take-up end, secondary line end, secondary take-up end and hanging wire end, wherein; Said feedback rises between line end and the said hanging wire end and is provided with lead, and said feedback rises between line end and the feedback take-up end and is provided with the said first line bag; Be provided with the second line bag between said feedback take-up end and the power supply ground; Be provided with three-way bag between said elementary line end and the elementary take-up end; Be provided with the 4th line bag between said secondary line end and the secondary take-up end; The said first line bag, the second line bag, three-way bag and the 4th line wrap in range upon range of placement on the skeleton from bottom to top, between the said first line bag and the second line bag, between the second line bag and the three-way bag, be provided with insulating tape between three-way bag and the 4th line bag.
Further; Said feedback plays two hanging wire heads that line end, feedback take-up end, elementary line end, elementary take-up end, secondary line end and secondary take-up end all are linked with the first line bag, three-way bag and the 4th line bag, and said hanging wire head is provided with the sleeve pipe of being processed by Teflon.
Further, said insulating tape is provided with two-layer.
The beneficial effect of the utility model:
A kind of small-power charger of the utility model comprises ac input end L, ac input end N, protective tube F1, elementary rectification circuit unit, filter circuit unit, inverter circuit unit, secondary commutation filter circuit unit, dc output end V+ and dc output end V-; Ac input end L is electrically connected with elementary rectification circuit unit through protective tube F1; Ac input end N is electrically connected with elementary rectification circuit unit; Elementary rectification circuit unit, filter circuit unit, inverter circuit unit and secondary commutation filter circuit unit are electrically connected successively, and secondary commutation filter circuit unit is electrically connected dc output end V+ and dc output end V-; The inverter circuit unit comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 6A, resistance R 7, capacitor C 3, capacitor C 4, capacitor C 5, diode D5, diode D6, transformer T1 and chip U1; Resistance R 2 one ends connect filter circuit unit, transformer T1 the 1st pin; Resistance R 2 other ends connect capacitor C 3 positive poles, diode D5 negative pole, chip U1 the 3rd pin, and capacitor C 3 negative poles connect power supply ground, and transformer T1 the 2nd pin connects chip U1 the 5th pin, chip U1 the 6th pin; Transformer T1 the 9th pin connects diode D6 positive pole, resistance R 7 one ends; Diode D6 negative pole connects capacitor C 5 one ends, secondary commutation filter circuit unit, and resistance R 7 other ends connect capacitor C 5 other ends, and transformer T1 the 6th pin connects secondary commutation filter circuit unit; Anodal resistance R 3 one ends that connect of diode D5; Resistance R 3 other ends connect resistance R 5 one ends, transformer T1 the 5th pin, and transformer T1 the 4th pin connects power supply ground, and resistance R 5 other ends connect resistance R 6 one ends, resistance R 6A one end, transformer U1 the 2nd pin; Resistance R 6 other ends, the resistance R 6A other end connect power supply ground; Transformer U1 the 8th pin connects power supply ground, and capacitor C 4 is connected between chip U1 the 1st pin and the power supply ground, and resistance R 4 is connected between chip U1 the 4th pin and the power supply ground.
A kind of small-power charger of the utility model need not use Y electric capacity and elementary clamp circuit just can test through EMI, and circuit is simple, saves cost, thereby realizes miniaturization and lightweight.
Description of drawings
Utilize accompanying drawing that the utility model is further specified, but the content in the accompanying drawing does not constitute any restriction to the utility model.
Fig. 1 is the circuit diagram of embodiment of a kind of small-power charger of the utility model.
Fig. 2 is the transformer principle figure of embodiment of a kind of small-power charger of the utility model.
Fig. 3 is the structure chart of skeleton of transformer of embodiment of a kind of small-power charger of the utility model.
Fig. 4 is the coiling precedence diagram of transformer of embodiment of a kind of small-power charger of the utility model.
In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, include:
Elementary rectification circuit unit 11, filter circuit unit 12, inverter circuit unit 13, secondary commutation filter circuit unit 14, line end 5, feedback take-up end 4, elementary line end 2, elementary take-up end 1, secondary line end 9, secondary take-up end 6, hanging wire end 100 have been fed back.
Embodiment
In conjunction with following examples the utility model is described further.
Embodiment
A kind of small-power charger of present embodiment such as Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4,
A kind of small-power charger of present embodiment, comprise ac input end L, ac input end N,
Protective tube F1, elementary rectification circuit unit 11, filter circuit unit 12, inverter circuit unit 13, secondary commutation filter circuit unit 14, dc output end V+ and dc output end V-; Ac input end L is electrically connected with elementary rectification circuit unit 11 through protective tube F1; Ac input end N is electrically connected with elementary rectification circuit unit 11; Elementary rectification circuit unit 11, filter circuit unit 12, inverter circuit unit 13 and secondary commutation filter circuit unit 14 are electrically connected successively, and secondary commutation filter circuit unit 14 is electrically connected dc output end V+ and dc output end V-; Inverter circuit unit 13 comprises resistance R 2, R3, R4, R5, R6, R6A, R7, capacitor C 3, C4, C5, diode D5, D6, transformer T1 and chip U1, and R2 one end connects filter circuit unit 12, T1 the 1st pin, and the R2 other end connects C3 positive pole, D5 negative pole, U1 the 3rd pin; The C3 negative pole connects power supply ground, and T1 the 2nd pin connects U1 the 5th pin, U1 the 6th pin, and T1 the 9th pin connects D6 positive pole, R7 one end; The D6 negative pole connects the electrode input end of C5 one end, secondary commutation filter circuit unit 14, and the R7 other end connects the C5 other end, and T1 the 6th pin connects the negative input of secondary commutation filter circuit unit 14; Anodal R3 one end that connects of D5; The R3 other end connects R5 one end, T1 the 5th pin, and T1 the 4th pin connects power supply ground, and the R5 other end connects R6 one end, R6A one end, U1 the 2nd pin; The R6 other end, the R6A other end connect power supply ground; U1 the 8th pin connects power supply ground, and C4 is connected between U1 the 1st pin and the power supply ground, and R4 is connected between U1 the 4th pin and the power supply ground.
Elementary rectification circuit unit 11 comprises rectifier bridge, and filter circuit unit 12 comprises capacitor C 1, C2, inductance L 1, L2, and secondary commutation filter circuit unit 14 comprises capacitor C 6 and resistance R 8; Protective tube F1 is connected between ac input end L and rectifier bridge the 2nd pin; Ac input end N connects rectifier bridge the 3rd pin; Rectifier bridge the 4th pin connects L1 one end, C1 is anodal; Rectifier bridge the 1st pin connects C1 negative pole, L2 one end, and the L1 other end connects R2 one end of C2 positive pole, inverter circuit unit 13, and the L2 other end connects C2 negative pole, power supply ground; T1 the 6th pin of inverter circuit unit 13 connects C6 negative pole, the R8 other end, dc output end V-.
The model of U1 is AP3968.
Transformer T1 comprises skeleton, magnetic core, the first line bag, the second line bag, three-way bag and the 4th line bag; Magnetic core is positioned over skeleton inside; The first line bag, the second line bag, three-way bag and the 4th line looping are around on the skeleton; Skeleton is provided with and has fed back line end 5, feedback take-up end 4, elementary line end 2, elementary take-up end 1, secondary line end 9, secondary take-up end 6 and hanging wire end 100; Wherein, fed back between line end 5 and the hanging wire end 100 and be provided with lead, fed back between line end and the feedback take-up end and be provided with the first line bag; Be provided with the second line bag between feedback take-up end 4 and the power supply ground; Be provided with three-way bag between elementary line end 2 and the elementary take-up end 1; Be provided with the 4th line bag between secondary line end 9 and the secondary take-up end 6; The first line bag, the second line bag, three-way bag and the 4th line wrap in range upon range of placement on the skeleton from bottom to top, between the first line bag and the second line bag, between the second line bag and the three-way bag, be provided with insulating tape between three-way bag and the 4th line bag.
The first line bag comprises 25 circle leads, and the coiling number of plies is 1 layer, and this lead is the lead of Φ 0.13*2P; Three-way bag comprises 130 circle leads, and the coiling number of plies is 3 layers, and this lead is the lead of Φ 0.13*1P; The second line bag comprises 0.9 circle Copper Foil.
The 4th line bag comprises 13 circle leads, and the coiling number of plies is 1 layer, and this lead is the lead of Φ 0.3*1P.
Two hanging wire heads that fed back line end, feed back the take-up end, elementary line end, elementary take-up end, secondary line end and secondary take-up end all are linked with the first line bag, three-way bag and the 4th line bag, the hanging wire head is provided with the sleeve pipe of being processed by Teflon.
Fed back the hanging wire headgear pipe of line end, the hanging wire headgear Guan Jun of feedback take-up end is the sleeve pipe that is of a size of Φ 0.35*10mm; The hanging wire headgear Guan Jun of the hanging wire headgear pipe of elementary line end, elementary take-up end is the sleeve pipe that is of a size of Φ 0.25*10mm; The hanging wire headgear Guan Jun of the hanging wire headgear pipe of secondary line end, secondary take-up end is the sleeve pipe that is of a size of Φ 0.45*23mm.
Insulating tape is provided with two-layer.
A kind of small-power charger of the utility model, its circuit theory is following:
Owing to adopt elementary feedback adjustment technology, so the resistance capacitance that has saved optocoupler, TL431 and mated with optocoupler, TL431; Through the particular design of transformer, need not use Y electric capacity and elementary clamp circuit just can test through EMI; Use is built-in with the chip AP3968 of triode, can realize copped wave and PWM control, and direct current is become interchange.
A kind of small-power charger of the utility model, its transformer manufacturing process comprises the steps:
1, line packs work: coiling is as the criterion with right hand machine, the clockwise direction rotation, and take-up the end of a thread need meet at right angles and draw.The first line bag be close around, begin to twine from feedback line end 5 with the lead of Φ 0.13mm*2P, from feeding back line end 5 backguys to hanging wire end 100; Unroll toward feedback take-up end 4 directions from hanging wire end 100, last the end of a thread is fixed on feedback take-up end 4 again, and coiling needs smooth; The coiling number of plies is 1 layer, totally 25 circles, and hanging wire headgear pipe uses the sleeve pipe that is of a size of Φ 0.35*10mm; Hanging wire headgear pipe exposes 3-5mm, double-bags with UL12mm buff insulating tape again; The second line bag is a 6mm length and width Copper Foil, and initial line is in feedback line end 5, and the other end is unsettled, plays shielding action; Three-way bag be close around, from elementary line end 2 initial lines, twine 3 layers with the lead of Φ 0.13mm*1P; Totally 130 circles, hanging wire are in elementary take-up end 1, and hanging wire headgear pipe uses the sleeve pipe that is of a size of Φ 0.25*10mm; Hanging wire headgear pipe exposes 3-5mm, double-bags with UL12mm buff insulating tape again; The 4th line bag be close around, from secondary line end 9 initial lines, twine 1 layer with the lead of Φ 0.3mm*1P; Totally 13 circles, hanging wire are in secondary take-up end 6, and hanging wire headgear pipe uses the sleeve pipe of Φ 0.45*23mm; Hanging wire headgear pipe exposes 5-8mm, double-bags with UL12mm buff insulating tape again.
2, the kinking wicking: flat stitch root twines and wicking, guarantee wicking after tin point do not exceed boss, notice during wicking that Wuxi, contact pin top is sharp.
3, assembling, test and impregnation: after the test electrical property is qualified, carry out impregnation, note can not being dipped into insulating oil on the stitch, then oven dry is handled.
4, packing: after the detecting electric parameter is qualified, attach a label to the transformer side, put in extranal packing box successively then.
The small-power charger of the utility model need not use Y electric capacity and elementary clamp circuit just can test through EMI; Entire circuit uses components and parts few, saves cost, thereby makes charger realize miniaturization and lightweight.
Should be noted that at last; Above embodiment only be used to explain the utility model technical scheme but not to the restriction of the utility model protection range; Although the utility model has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model, and do not break away from the essence and the scope of the utility model technical scheme.
Claims (6)
1. a small-power charger comprises ac input end L, ac input end N, protective tube F1, elementary rectification circuit unit, filter circuit unit, inverter circuit unit, secondary commutation filter circuit unit, dc output end V+ and dc output end V-;
Said ac input end L is electrically connected with said elementary rectification circuit unit through protective tube F1; Said ac input end N is electrically connected with said elementary rectification circuit unit; Said elementary rectification circuit unit, filter circuit unit, inverter circuit unit and secondary commutation filter circuit unit are electrically connected successively, and said secondary commutation filter circuit unit is electrically connected said dc output end V+ and dc output end V-;
It is characterized in that: said inverter circuit unit comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 6A, resistance R 7, capacitor C 3, capacitor C 4, capacitor C 5, diode D5, diode D6, transformer T1 and chip U1; Said resistance R 2 one ends connect said filter circuit unit, transformer T1 the 1st pin; Resistance R 2 other ends connect capacitor C 3 positive poles, diode D5 negative pole, chip U1 the 3rd pin, and capacitor C 3 negative poles connect power supply ground, and transformer T1 the 2nd pin connects chip U1 the 5th pin, chip U1 the 6th pin; Transformer T1 the 9th pin connects diode D6 positive pole, resistance R 7 one ends; Diode D6 negative pole connects capacitor C 5 one ends, secondary commutation filter circuit unit, and resistance R 7 other ends connect capacitor C 5 other ends, and transformer T1 the 6th pin connects secondary commutation filter circuit unit; Anodal resistance R 3 one ends that connect of diode D5; Resistance R 3 other ends connect resistance R 5 one ends, transformer T1 the 5th pin, and transformer T1 the 4th pin connects power supply ground, and resistance R 5 other ends connect resistance R 6 one ends, resistance R 6A one end, transformer U1 the 2nd pin; Resistance R 6 other ends, the resistance R 6A other end connect power supply ground; Transformer U1 the 8th pin connects power supply ground, and capacitor C 4 is connected between chip U1 the 1st pin and the power supply ground, and resistance R 4 is connected between chip U1 the 4th pin and the power supply ground.
2. a kind of small-power charger according to claim 1; It is characterized in that: said elementary rectification circuit unit comprises rectifier bridge; Said filter circuit unit comprises capacitor C 1, capacitor C 2, inductance L 1, inductance L 2, and said secondary commutation filter circuit unit comprises capacitor C 6 and resistance R 8; Said protective tube F1 is connected between ac input end L and rectifier bridge the 2nd pin; Ac input end N connects said rectifier bridge the 3rd pin; Said rectifier bridge the 4th pin connects inductance L 1 one ends, capacitor C 1 positive pole; Said rectifier bridge the 1st pin connects capacitor C 1 negative pole, inductance L 2 one ends, and inductance L 1 other end connects resistance R 2 one ends of capacitor C 2 positive poles, inverter circuit unit, and inductance L 2 other ends connect capacitor C 2 negative poles, power supply ground; T1 the 6th pin of inverter circuit unit connects capacitor C 6 negative poles, resistance R 8 other ends, dc output end V-.
3. a kind of small-power charger according to claim 2 is characterized in that: the model of said chip U1 is AP3968.
4. a kind of small-power charger according to claim 3; It is characterized in that: said transformer T1 comprises skeleton, magnetic core, the first line bag, the second line bag, three-way bag and the 4th line bag; It is inner that said magnetic core is positioned over said skeleton; The said first line bag, the second line bag, three-way bag and the 4th line looping are around on the said skeleton, and said skeleton is provided with and has fed back line end, feedback take-up end, elementary line end, elementary take-up end, secondary line end, secondary take-up end and hanging wire end, wherein; Said feedback rises between line end and the said hanging wire end and is provided with lead, and said feedback rises between line end and the feedback take-up end and is provided with the said first line bag; Said feedback rises and is provided with the second line bag between line end and the power supply ground; Be provided with three-way bag between said elementary line end and the elementary take-up end; Be provided with the 4th line bag between said secondary line end and the secondary take-up end; The said first line bag, the second line bag, three-way bag and the 4th line wrap in range upon range of placement on the skeleton from bottom to top, between the said first line bag and the second line bag, between the second line bag and the three-way bag, be provided with insulating tape between three-way bag and the 4th line bag.
5. a kind of small-power charger according to claim 4; It is characterized in that: said feedback plays two hanging wire heads that line end, feedback take-up end, elementary line end, elementary take-up end, secondary line end and secondary take-up end all are linked with the first line bag, three-way bag and the 4th line bag, and said hanging wire head is provided with the sleeve pipe of being processed by Teflon.
6. a kind of small-power charger according to claim 4, it is characterized in that: said insulating tape is provided with two-layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120228279U CN202142902U (en) | 2011-06-30 | 2011-06-30 | Low power charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120228279U CN202142902U (en) | 2011-06-30 | 2011-06-30 | Low power charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202142902U true CN202142902U (en) | 2012-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120228279U Expired - Fee Related CN202142902U (en) | 2011-06-30 | 2011-06-30 | Low power charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202142902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112514013A (en) * | 2020-04-13 | 2021-03-16 | 深圳欣锐科技股份有限公司 | Transformer, transformation device and transformation method |
-
2011
- 2011-06-30 CN CN201120228279U patent/CN202142902U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112514013A (en) * | 2020-04-13 | 2021-03-16 | 深圳欣锐科技股份有限公司 | Transformer, transformation device and transformation method |
| WO2021207893A1 (en) * | 2020-04-13 | 2021-10-21 | 深圳欣锐科技股份有限公司 | Transformer, transformation apparatus and transformation method |
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| 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: 20120208 Termination date: 20190630 |
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| CF01 | Termination of patent right due to non-payment of annual fee |