CN202142003U - Laptop power adapter - Google Patents
Laptop power adapter Download PDFInfo
- Publication number
- CN202142003U CN202142003U CN201120284836U CN201120284836U CN202142003U CN 202142003 U CN202142003 U CN 202142003U CN 201120284836 U CN201120284836 U CN 201120284836U CN 201120284836 U CN201120284836 U CN 201120284836U CN 202142003 U CN202142003 U CN 202142003U
- Authority
- CN
- China
- Prior art keywords
- control chip
- circuit
- voltage
- output
- winding
- 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.)
- Expired - Fee Related
Links
- 238000004804 winding Methods 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 9
- 230000009466 transformation Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Abstract
The utility model provides a laptop power adapter. The laptop power adapter comprises an input rectification filter circuit for converting alternate current into direct current, a DC output terminal for outputting low-voltage direct current, a switch transformer for converting direct current into low-voltage direct current, a control chip for controlling voltage conversion of the switch transformer, a power switch, a starting circuit, a working power supply circuit, an output rectification filter circuit and a feedback circuit. The laptop power adapter has low energy consumption in the no-load and light-load state, and discrete components outside the control chip are fewer, so that the system power density is effectively improved, the system cost is lowered, and the system EMI (Electromagnetic Interference) property is improved.
Description
Technical field
The utility model relates to the laptop field, relates in particular to a kind of laptop adapter.
Background technology
Notebook computer just lower with its price, advantages of small volume, has been easy to carry and extensively receives consumer's recognition and acceptance since coming out in 2007, and last year, only fourth quarter, its shipment amount in the whole world just reached 1,000 ten thousand ones, and visible speed of development is so fast.
And power supply adaptor---as " source of power " of online notebook, also the demand because of market must develop like the mushrooms after rain.The quality of power supply adaptor is very different at present, and following drawback is arranged: power density is low, and light-load efficiency is low, and skin temperature is high, and the EMI characteristic is poor, and cost is high.
The utility model content
The purpose of the utility model is to provide that a kind of power density is high, efficient is high, the laptop adapter that the EMI characteristic is good.
The purpose of the utility model realizes through following technical scheme.
A kind of laptop adapter comprises alternating current is transformed to galvanic input rectifying filtering circuit that this circuit provides electrode input end and negative input; The dc output end of output low-voltage DC;
Direct current is transformed to the switch transformer of low-voltage DC, the second subprime winding that this switch transformer has an elementary winding that connects electrode input end, first secondary winding that connects negative input, is connected with dc output end;
The control chip of CS transformer voltage of transformation, this control chip control pin sends control signal;
Be connected between the other end and negative input of elementary winding, controlled by said control signal, conducting or turn-off the power switch of elementary winding;
The said control chip of another termination of the said electrode input end of one termination starts the start-up circuit to the control chip power supply that is used for when starting of pin;
Connect the other end of said first secondary winding, the work feed circuit of working power are provided to the control chip supply pin;
Be connected on the output rectifier and filter that is used for filtering and burning voltage between said second subprime winding and the dc output end;
Feed back the feedback circuit of said second subprime winding output voltage signal to control chip feedback pin.
Preferably: said control chip adopts pwm chip 082269.
Preferably: said power switch is a FET.
Preferably: said input rectifying filtering circuit comprises first electromagnetic interface filter that is connected on alternating current inlet wire side.
Preferably: said output rectifier and filter comprises second electromagnetic interface filter that is connected on dc output end outlet side.
The utility model embodiment compared with prior art, the utility model energy consumption under unloaded light condition is low, the outer discrete component of control chip is few; Effectively improved the power density of system; The cost of reduction system has improved the EMI characteristic of system, has reduced the cost of system.
Description of drawings
Fig. 1 is the utility model theory diagram.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Referring to shown in Figure 1, the utility model comprises: alternating current is transformed to galvanic input rectifying filtering circuit 1, and this circuit provides electrode input end V+ and negative input V-; Dc output end Vo, the GND of output low-voltage DC; Direct current is transformed to the switch transformer 2 of low-voltage DC, the second subprime winding that this switch transformer has an elementary winding that connects electrode input end, first secondary winding that connects negative input, is connected with dc output end; The control chip 3 of CS transformer voltage of transformation, this control chip control pin GATE sends control signal; This control signal is controlled the break-make of a power switch 8; This switch series is connected between the other end and negative input V-of elementary winding; Power switch 8 is according to control signal certain frequency conducting and shutoff, thereby driving switch transformer Tl work is transformed to low-voltage DC with high voltage direct current; Another termination control chip of the said electrode input end of one termination starts the start-up circuit 4 to the control chip power supply that is used for when starting of pin VIN; Connect the other end of first secondary winding, the work feed circuit 5 of working power are provided to control chip supply pin VDD; Be connected on the output rectifier and filter 7 that is used for filtering and burning voltage between second subprime winding and the dc output end; Feedback circuit 9 to control chip feedback pin FB feedback second subprime winding output voltage signal.
In preferred embodiment, elementary winding two also connects absorption circuit 6.Control chip adopts pwm chip 082269, and power switch 8 is a FET.Feedback circuit 9 comprises the photoelectrical coupler IC2 that feedback voltage signal is isolated.Input rectifying filtering circuit l comprises the electromagnetic interface filter LF1 that is connected on alternating current inlet wire side.Output rectifier and filter 7 comprises the electromagnetic interface filter LF2 that is connected on dc output end outlet side.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (5)
1. a laptop adapter comprises alternating current is transformed to galvanic input rectifying filtering circuit, and this circuit provides electrode input end and negative input; The dc output end of output low-voltage DC; It is characterized in that also comprising:
Direct current is transformed to the switch transformer of low-voltage DC, the second subprime winding that this switch transformer has an elementary winding that connects electrode input end, first secondary winding that connects negative input, is connected with dc output end;
The control chip of CS transformer voltage of transformation, this control chip control pin sends control signal;
Be connected between the other end and negative input of elementary winding, controlled by said control signal, conducting or turn-off the power switch of elementary winding;
The said control chip of another termination of the said electrode input end of one termination starts the start-up circuit to the control chip power supply that is used for when starting of pin;
Connect the other end of said first secondary winding, the work feed circuit of working power are provided to the control chip supply pin;
Be connected on the output rectifier and filter that is used for filtering and burning voltage between said second subprime winding and the dc output end;
Feed back the feedback circuit of said second subprime winding output voltage signal to control chip feedback pin.
2. laptop adapter as claimed in claim 1 is characterized in that: said control chip adopts pwm chip 082269.
3. laptop adapter as claimed in claim 1 is characterized in that: said power switch is a FET.
4. laptop adapter as claimed in claim 1 is characterized in that: said input rectifying filtering circuit comprises first electromagnetic interface filter that is connected on alternating current inlet wire side.
5. laptop adapter as claimed in claim 1 is characterized in that: said output rectifier and filter comprises second electromagnetic interface filter that is connected on dc output end outlet side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120284836U CN202142003U (en) | 2011-08-05 | 2011-08-05 | Laptop power adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120284836U CN202142003U (en) | 2011-08-05 | 2011-08-05 | Laptop power adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202142003U true CN202142003U (en) | 2012-02-08 |
Family
ID=45553056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120284836U Expired - Fee Related CN202142003U (en) | 2011-08-05 | 2011-08-05 | Laptop power adapter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202142003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107708260A (en) * | 2017-10-30 | 2018-02-16 | 东莞市铭皓照明有限公司 | It is a kind of that the circuit at DC low-voltage end is changed by alternating current interval break-make number |
-
2011
- 2011-08-05 CN CN201120284836U patent/CN202142003U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107708260A (en) * | 2017-10-30 | 2018-02-16 | 东莞市铭皓照明有限公司 | It is a kind of that the circuit at DC low-voltage end is changed by alternating current interval break-make number |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201540530U (en) | Power adapter applicable to laptop | |
| CN101865980A (en) | Method for aging of low-voltage, high-current and non-isolated DC-DC power supply | |
| CN101917131B (en) | Cascade Buck-boost high power factor alternating current-direct current (AC-DC) converter and current converting method | |
| CN203167379U (en) | An isolated driving power supply of a LED fluorescent lamp | |
| WO2022206481A1 (en) | Power conversion circuit and adapter | |
| CN204068745U (en) | A kind of transformer leakage inductance Energy harvesting type flyback sourse system | |
| CN203326888U (en) | Light-load and high-efficiency novel-type adapter power supply | |
| CN202142003U (en) | Laptop power adapter | |
| CN202424283U (en) | Charger based on single-chip three-end TOP22X integrated chip | |
| CN202025031U (en) | Single-phase low-power carrier consumption-controlled intelligent electric energy meter based on DC-DC | |
| CN202218174U (en) | Modified sine wave inverter having charging function | |
| CN204068742U (en) | Low-power power adapter drive circuit | |
| CN207304013U (en) | The power factor correction circuit compared based on stagnant ring | |
| CN202907268U (en) | LED driving circuit | |
| CN203015174U (en) | Led drive circuit | |
| CN204597791U (en) | A kind of digital switch power supply based on DSP | |
| CN201550033U (en) | Switch power supply based on PWM control and charger provided with same | |
| CN217693075U (en) | High-energy-efficiency switching power supply of LED lamp strip | |
| CN105007666A (en) | Flicker-free high power factor LED drive power supply | |
| CN203708560U (en) | Load drive circuit of low voltage DC power supply equipment | |
| CN204741417U (en) | Electric power maintenance vehicle's vehicle mounted power | |
| CN214799000U (en) | Charging circuit and device based on resonant controller | |
| CN203086225U (en) | Battery charger based on single-chip six-terminal TOP 24X series | |
| CN204205994U (en) | A kind of sound equipment power circuit | |
| CN102891590A (en) | Power supply control device and switch power supply comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151014 Address after: 518000 Guangdong province Shenzhen city Nanshan District high tech Zone North Song Ping Shan Qi Min Road No. 3 Building 4 floor south Yu Yang Patentee after: SHENZHEN ROMOSS TECHNOLOGY CO., LTD. Address before: 518000, Shenzhen, Guangdong province Baoan District manhole street, Dili Road Agricultural Company Dili Industrial Zone A Zone No. 2 Patentee before: Shenzhen LikkPower Electronics Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20190805 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |