CN204538993U - A kind of multi-output power supply adapter circuit - Google Patents
A kind of multi-output power supply adapter circuit Download PDFInfo
- Publication number
- CN204538993U CN204538993U CN201520093660.9U CN201520093660U CN204538993U CN 204538993 U CN204538993 U CN 204538993U CN 201520093660 U CN201520093660 U CN 201520093660U CN 204538993 U CN204538993 U CN 204538993U
- Authority
- CN
- China
- Prior art keywords
- transformer
- winding
- output
- circuit
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of multi-output power supply adapter circuit, comprises filter rectifier, RCD absorption circuit, current regulating circuit and transformer; Filter rectifier input connects power supply input, output connects the input of RCD absorption circuit and current regulating circuit respectively, the armature winding of the output connection transformer of RCD absorption circuit, the armature winding of transformer is coupled with the secondary winding of transformer, and the secondary winding of transformer connects load; The armature winding of the output connection transformer of current regulating circuit, current regulating circuit regulates the output current of the armature winding of transformer with output constant current electric current according to the change in voltage of the secondary winding of sampling transformer.The utility model simultaneously compatiblely can be suitable for different electrical equipment, and realizes class constant current output.
Description
Technical field
The utility model relates to power supply adaptor technical field, refers in particular to a kind of multi-output power supply adapter circuit.
Background technology
In prior art, shaver, LED drive and FM broadcast receiver, usually all coordinate different power supply adaptors.
The power supply adaptor of tradition shaver be meet shaver V I characteristic, often adopt linear power supply, do similar constant power output by silicon steel sheet compound mode, not only cost increase and heaviness are unfavorable for taking just for they.The power supply adaptor of another kind of traditional shaver is in order to save space, adopt non-isolated mode, the output of a constant voltage is done in resistance-capacitance depressurization mode, because adopt the mode of non-isolated, increase the risk that user gets an electric shock, again because of constant voltage design, during for shaver terminal charged pool, constant voltage design can not good full charging pond.
The power supply adaptor that LED drives often adopts constant current IC as driving, is not with optical flare to control, and often can not compatible low pressure during constant current, and again because constant current IC can not do voltage control, often output voltage depends on a number of LED or the joint pressure of LED.
The wireless power supply adaptor of FM affects radio reception effect for preventing from external interference, traditional power adaptor often wants additional filtering common mode inductance and differential mode inductance, or toroidal core, and cost is larger.
Described three kinds of products, when applying, need carry many moneys power supply because not unifying a power supply, if just conveniently, only several module overlapped, spatially require size large and weight lays particular stress on, for solving described problem, this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of multi-output power supply adapter circuit, is suitable for different electrical equipment, and realizes class constant current output with simultaneously compatible.
For reaching above-mentioned purpose, solution of the present utility model is:
A kind of multi-output power supply adapter circuit, comprises filter rectifier, RCD absorption circuit, current regulating circuit and transformer; Filter rectifier input connects power supply input, output connects the input of RCD absorption circuit and current regulating circuit respectively, the armature winding of the output connection transformer of RCD absorption circuit, the armature winding of transformer is coupled with the secondary winding of transformer, and the secondary winding of transformer connects load; The armature winding of the output connection transformer of current regulating circuit, current regulating circuit regulates the output current of the armature winding of transformer with output constant current electric current according to the change in voltage of the secondary winding of sampling transformer.
Further, described current regulating circuit comprises the feedback winding be coupled with the secondary winding of transformer, current sampling resistor R106, integrated IC and current regulating resistance R108, R109, R110, R111; Feedback winding one tunnel connects the InV pin of integrated IC through current sampling resistor R106, another road connects current regulating resistance R111, current regulating resistance R111 mono-tunnel connects the CS pin of integrated IC, another road connects current regulating resistance R108, ground connection after current regulating resistance R108 current regulating resistance R109, R110 after parallel connection; The VDD pin of integrated IC connects filter rectifier output, ground connection after the E pin of integrated IC current regulating resistance R109, R110 after parallel connection, and the armature winding of the Drain pin connection transformer of integrated IC.
Further, described feedback winding and secondary winding are around the innermost layer of transformer coil frame, outer around armature winding.
Further, described transformer also arranges shield winding, the winding mode of shield winding and feedback winding be evenly dredge around, there is uniform gap between adjacent coiling.
Further, the electric capacity C102 in described RCD absorption circuit is polyester film capacitor.
After adopting such scheme, the armature winding of the output single connection transformer of the utility model current regulating circuit, current regulating circuit regulates the output current of the armature winding of transformer with output constant current electric current according to the change in voltage of the secondary winding of sampling transformer.The utility model be applicable to different electrical equipment as shaver, LED drive and broadcast receiver time, current regulating circuit exports different continuous currents automatically according to different loads, realizes the universal compatibility for different electrical equipment.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model;
Fig. 2 is the V-I curve chart of the utility model when being applicable to shaver.
Label declaration
Filter rectifier 1 RCD absorption circuit 2
Current regulating circuit 3 transformer 4
Armature winding 41 secondary winding 42
Feedback winding 43.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in detail.
Consult shown in Fig. 1, a kind of multi-output power supply adapter circuit that the utility model discloses, comprise filter rectifier 1, RCD absorption circuit 2, current regulating circuit 3 and transformer 4.
Filter rectifier 1 input connects power supply input, output connects the input of RCD absorption circuit 2 and current regulating circuit 3 respectively, the armature winding 41 of the output connection transformer 4 of RCD absorption circuit 2, the armature winding 41 of transformer 4 is coupled with the secondary winding 42 of transformer 4, and the secondary winding 42 of transformer 4 connects load.
The armature winding 41 of the output connection transformer 4 of current regulating circuit 3, current regulating circuit 4 regulates the output current of the armature winding 41 of transformer 4 with output constant current electric current according to the change in voltage of the secondary winding 42 of sampling transformer 4.
In the present embodiment, described current regulating circuit 3 comprises the feedback winding 43 be coupled with the secondary winding 42 of transformer 4, current sampling resistor R106, integrated IC and current regulating resistance R108, R109, R110, R111.
Feedback winding 43 1 tunnel connects the InV pin of integrated IC through current sampling resistor R106, another road connects current regulating resistance R111, current regulating resistance R111 mono-tunnel connects the CS pin of integrated IC, another road connects current regulating resistance R108, ground connection after current regulating resistance R108 current regulating resistance R109, R110 after parallel connection.
The VDD pin of integrated IC connects filter rectifier output, ground connection after the E pin of integrated IC current regulating resistance R109, R110 after parallel connection, and the armature winding 41 of the Drain pin connection transformer 4 of integrated IC.
Described integrated IC is the integrated IC (SN27) being designed with PWM and PFM function, can power initiation laggard enter frequency-selecting battery saving mode and class constant current operation, and frequency can from 2.5 Khz to 65 Khz, to ensure that electric shaver is when startup requires big current, comparatively ideal effect is reached by putting forward high-frequency mode, to ensure same initial conditions, export larger power, simultaneously after normal boot-strap, if be not activated the load under this state of electric shaver, by the mode of frequency reducing, reach reduction no-load power, 75mW max is less than to reach standby power, meeting DOE Level and the requirement of COC2016 efficiency. typical V-I curve is as shown in Figure 2.
When the operating load required for transformer 4 output is different, by Vref detection port perception output loading situation now, when required load is larger, when energy is more, the energy of feedback winding 43 perception is also different, now energy is larger, now determined above base current R111, outside meeting, to add to the certain electric current of integrated ICVcs by outside, with ensure comparatively heavy load time power points improve, when required load is less, less by the energy of feedback winding 43 perception, additional to determine base current very little, and determine electric current much smaller than what normally work, now work in class constant current mode, but can not to make the mistake judgement due to electrical network reason, to ensure that LED equilibrium is not dodged.
When the utility model is applicable to FM broadcast receiver, for preventing FM to be subject to the interference of other power consumption equipment when carrying out frequency modulation, different with supply current according to different signal frequencies, the PWM operating frequency of integrated IC also can be different.
Described feedback winding 43 and secondary winding 42 are around the innermost layer of transformer coil frame, outer around armature winding 41.By feedback winding 43 and secondary winding around transformer innermost layer to improve their degree of coupling; and suitably increase the turn ratio of feedback winding 43 pairs of secondary winding 42; when secondary winding 42 overvoltage; feedback winding 43 can faster coupled voltages exactly; give integrated IC by the signal transmission of overvoltage, thus enter overvoltage protection state.This overvoltage protection scheme is more effective, and eliminates secondary voltage-stabilizing protection assembly or loop of voltage regulation, thus adds the competitiveness of product.As a same reason, when shaver short circuit, secondary winding 42 also presents short-circuit condition, and now the coupled voltages fed back on winding 43 also drops to zero rapidly, and cannot provide operating voltage to integrated IC, integrated IC enters under-voltage protection pattern, realizes short-circuit protection function.
Described transformer 4 also arranges shield winding, the winding mode of shield winding and feedback winding 43 be evenly dredge around, there is uniform gap between adjacent coiling.By feedback winding 43 and shield winding with evenly dredge around mode reach transformer 4 builtin voltage balance, the common-mode voltage that noise immunity is produced is minimum with the EMI effect reached, according to formula: C=ε s/4 π kd, when d is even, the junction capacitance C then produced is even, and two winding electric magnetic direction are contrary simultaneously, feedback winding 43 outlet and shield winding lambda line, thus electric capacity produce common-mode voltage, positive and negative offset the earth.
Electric capacity C102 in described RCD absorption circuit 2 is polyester film capacitor, and polyester film capacitor frequency response bandwidth is wide, and dielectric loss is little, effectively prevents interference and the spatial of noise, thus meets IEC noise requirements and be maximumly no more than 20 Db.
The foregoing is only preferred embodiment of the present utility model, not to the restriction of this case design, all equivalent variations done according to the design key of this case, all fall into the protection range of this case.
Claims (5)
1. a multi-output power supply adapter circuit, is characterized in that: comprise filter rectifier, RCD absorption circuit, current regulating circuit and transformer; Filter rectifier input connects power supply input, output connects the input of RCD absorption circuit and current regulating circuit respectively, the armature winding of the output connection transformer of RCD absorption circuit, the armature winding of transformer is coupled with the secondary winding of transformer, and the secondary winding of transformer connects load; The armature winding of the output connection transformer of current regulating circuit, current regulating circuit regulates the output current of the armature winding of transformer with output constant current electric current according to the change in voltage of the secondary winding of sampling transformer.
2. a kind of multi-output power supply adapter circuit as claimed in claim 1, it is characterized in that: described current regulating circuit comprises the feedback winding be coupled with the secondary winding of transformer, current sampling resistor R106, integrated IC and current regulating resistance R108, R109, R110, R111; Feedback winding one tunnel connects the InV pin of integrated IC through current sampling resistor R106, another road connects current regulating resistance R111, current regulating resistance R111 mono-tunnel connects the CS pin of integrated IC, another road connects current regulating resistance R108, ground connection after current regulating resistance R108 current regulating resistance R109, R110 after parallel connection; The VDD pin of integrated IC connects filter rectifier output, ground connection after the E pin of integrated IC current regulating resistance R109, R110 after parallel connection, and the armature winding of the Drain pin connection transformer of integrated IC.
3. a kind of multi-output power supply adapter circuit as claimed in claim 2, is characterized in that: described feedback winding and secondary winding are around the innermost layer of transformer coil frame, outer around armature winding.
4. a kind of multi-output power supply adapter circuit as claimed in claim 2 or claim 3, is characterized in that: described transformer also arranges shield winding, the winding mode of shield winding and feedback winding be evenly dredge around, there is uniform gap between adjacent coiling.
5. a kind of multi-output power supply adapter circuit as claimed in claim 1 or 2, is characterized in that: the electric capacity C102 in described RCD absorption circuit is polyester film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520093660.9U CN204538993U (en) | 2015-02-10 | 2015-02-10 | A kind of multi-output power supply adapter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520093660.9U CN204538993U (en) | 2015-02-10 | 2015-02-10 | A kind of multi-output power supply adapter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204538993U true CN204538993U (en) | 2015-08-05 |
Family
ID=53752949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520093660.9U Active CN204538993U (en) | 2015-02-10 | 2015-02-10 | A kind of multi-output power supply adapter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204538993U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682743A (en) * | 2015-02-10 | 2015-06-03 | 厦门台和电子有限公司 | Multi-output power adapter circuit |
-
2015
- 2015-02-10 CN CN201520093660.9U patent/CN204538993U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682743A (en) * | 2015-02-10 | 2015-06-03 | 厦门台和电子有限公司 | Multi-output power adapter circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3787170A1 (en) | Dcdc converter, vehicle-mounted charger and electric vehicle | |
| CN104682743A (en) | Multi-output power adapter circuit | |
| CN112803610B (en) | Device to be charged, system, wireless charging method and storage medium | |
| CN105226732B (en) | The draw-out power supply circuit of cable temperature monitoring device | |
| CN107947252A (en) | Terminal and equipment | |
| CN107528294A (en) | Power supply changeover device with load switch error protection | |
| CN104184200A (en) | Power supply adapter, power supply adapter control method and notebook | |
| CN109905042A (en) | A kind of power-supply device and its power circuit | |
| CN108964457A (en) | The embodiment of high-efficiency battery charger for electronic device | |
| CN203813661U (en) | Primary control flyback switch power supply control chip and output line voltage compensating circuit | |
| CN102664528B (en) | A kind of Switching Power Supply | |
| CN203288400U (en) | Transformer used for flyback switch power supply | |
| CN103840567A (en) | Device and method for obtaining electric energy through current transformer made of composite magnetic core materials | |
| CN106233602A (en) | Power supply device, AC adapter, AC charger, electronic equipment and electric power supply system | |
| CN106655824A (en) | Switching power source control circuit and switching power source | |
| CN106233603A (en) | Power supply device, AC adapter, AC charger, electronic equipment and electric power supply system | |
| CN203933169U (en) | A kind of electromagnetic induction power taking radio frequency temperature measuring equipment | |
| WO2024051086A9 (en) | Electric power receiving device, electric power sending device, and electric power transmission method | |
| CN207200580U (en) | A kind of Burst Mode voltage adaptives adjust circuit | |
| CN112930512B (en) | Display system, display device and control method thereof | |
| CN105356545B (en) | A kind of Electrical Safety acquisition module electric supply installation | |
| CN204538993U (en) | A kind of multi-output power supply adapter circuit | |
| CN206259864U (en) | Switching power source control circuit and Switching Power Supply | |
| CN219513975U (en) | Programmable power supply device | |
| CN205070531U (en) | Double -H groove weld SB fills socket soon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yi Shoutuan Inventor after: Pan Lianxing Inventor after: Jian Zhijian Inventor after: Zhou Ying Inventor before: Huang Dongyang |
|
| COR | Change of bibliographic data |