CN106208707B - Power adapter and switch control unit therein - Google Patents
Power adapter and switch control unit therein Download PDFInfo
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- CN106208707B CN106208707B CN201610176706.2A CN201610176706A CN106208707B CN 106208707 B CN106208707 B CN 106208707B CN 201610176706 A CN201610176706 A CN 201610176706A CN 106208707 B CN106208707 B CN 106208707B
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- voltage
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- output voltage
- resistance
- switch
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of power adapter controls an isolated voltage transformation unit with a switch control unit, and to generate a DC output voltage, the target value of the DC output voltage can change with the different set of the goal-setting signal.One reference voltage is provided inside the switch control unit and the switch control unit includes a feedback contact and a variable resistance, for the feedback contact to receive the feedback signal for being relevant to DC output voltage, this feedback contact is coupled to the reference voltage via the variable resistance.The resistance value of variable resistance adapts to the difference of the DC output voltage and adjusts, in the case where different DC output voltage, to provide different compensation.In addition, the present invention also proposes a kind of switch control unit of power adapter.
Description
Technical field
The present invention relates to a kind of power adapters, specifically for the resistance value by adjusting a wherein variable resistance, to be directed to
Different DC output voltage provide a kind of power adapter of different compensation.
Background technique
Referring to Fig.1, wherein showing the power adapter 10 of a traditional design, an AC-input voltage and a direct current are connected to
Between output voltage Vo, it includes: a rectification unit 11 is coupled to AC-input voltage, to convert AC-input voltage as one
Voltage after rectification, as input side voltage Vp；One isolated voltage transformation unit 12 has an input lateral coil 121 and an output
Lateral coil 122, isolated voltage transformation unit 12 is according to the input side voltage Vp for being coupled to input lateral coil 121, in output lateral coil
122 generate an outlet side voltage Vs, and outlet side voltage Vs is coupled to and to generate DC output voltage Vo；One switch 13, coupling
It is connected to input lateral coil 121, to control the input side electric current Ip by input lateral coil 121；One feedback unit 14, according to straight
An output voltage Vo and goal-setting signal Vset is flowed, (Vo ' is related to DC output voltage Vo to generate a feedback signal Sf
Signal, therefore the such as, but not limited to partial pressure of Vo is according to DC output voltage Vo) according to Vo ', wherein direct current is defeated
The target value of voltage Vo can change with the different set of goal-setting signal Vset out；And a switch control unit 15, lead to
One first contact CS is crossed to sense input side electric current Ip, receives feedback signal Sf further through one second contact COMP, and according to defeated
Enter side electric current Ip and feedback signal Sf, with the on state of control switch 13.
Power adapter 10 above-mentioned, can be by setting different goal-setting signal Vset, and according to different external
DC output voltage specification demands needed for device, such as laptop need 19V power supply, smartphone to need 5V electric
Source, to provide different DC output voltage Vo.However, in different DC output voltage Vo, whole feedback control
Compensating parameter value needed for circuit will be different, but every circuit parameter inside switch control unit 15 is fixed.
Therefore, for example, if the compensating parameter inside switch control unit 15 be for DC output voltage be 19V the case where come
Design, then when DC output voltage is 5V, it is possible to cause system unstable, vice versa.
The present invention proposes a kind of power adapter and switch control unit therein, can mention for different DC output voltage
For different compensation, to solve the above problems.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, proposes a kind of power adapter and therein open
Control unit is closed, different compensation can be provided for different DC output voltage.
In order to achieve the above object, one of viewpoint is sayed, it is whole to receive one the present invention provides a kind of power adapter
Voltage after stream, and a DC output voltage is generated, it includes: an isolated voltage transformation unit has an input lateral coil and one
Lateral coil is exported, which couples the voltage after the rectification to obtain an input side voltage, and the outlet side is coil-induced
The input lateral coil and generate the DC output voltage；One switch, is coupled to the input lateral coil, passes through the input side with control
One input side electric current of coil；One feedback unit, according to the DC output voltage and a goal-setting signal, to generate a feedback
Signal, wherein the target value of the DC output voltage can change with the different set of the goal-setting signal；And one switch
Control unit, to control the on state of the switch, is provided to generate a switch control signal inside the switch control unit
One reference voltage and the switch control unit include a feedback contact and a variable resistance, and the feedback contact is to receive the feedback
Signal, this feedback contact are coupled to the reference voltage via the variable resistance, are somebody's turn to do with generating to correspond in the feedback junction
One feedback voltage of feedback signal, wherein the duty cycle of the switch control signal is relevant to the feedback voltage, and wherein, should
The resistance value of variable resistance adapts to the difference of the DC output voltage and adjusts, in the case where different DC output voltage,
Different compensation is provided.
In one embodiment, which determines the switch also according to the sensing result to the input side electric current
Control the end time point of the duty cycle of signal.
In one embodiment, which includes a resistance control unit again, according to the DC output voltage, with certainly
The resistance value of the fixed variable resistance.
In one embodiment, which is a voltage-controlled variable resistance, and the resistance control unit includes an electricity
Pressure mapping (mapping) unit, this voltage map unit generates a corresponding voltage according to the DC output voltage, with control
The resistance value of the variable resistance.
In one embodiment, which includes multiple concatenated resistance and accordingly in parallel multiple with multiple resistance
Switch, and the resistance control unit includes an ON-OFF control circuit, is corresponded to according to the sensing result to the DC output voltage
Ground controls multiple switch, to control the resistance value of the variable resistance.
In one embodiment, which includes an optically coupled circuit.
In one embodiment, which includes an output voltage setup unit again, is coupled to the optically coupled circuit, this is defeated
Voltage setup unit determines the target value of the DC output voltage according to a goal-setting signal out.
In one embodiment, which includes the branch adjustment circuit (Shunt being coupled against each other
) and a compensation circuit regulator.
In order to achieve the above object, saying with regard to another viewpoint, the present invention provides a kind of switch control units, are applied to a power supply
Converter.This power adapter generates a DC output voltage to the voltage after receiving a rectification, the power adapter packet
Contain: an isolated voltage transformation unit has an input lateral coil and an output lateral coil, after which couples the rectification
Voltage to obtain an input side voltage, the coil-induced input lateral coil of the outlet side and generate the DC output voltage；One opens
It closes to control the input side electric current by the input lateral coil；And a feedback unit, according to the DC output voltage and one
Goal-setting signal, to generate a feedback signal, wherein the target value of the DC output voltage can be with the goal-setting signal
Different set and change.Switch control unit includes to control the switch, switch control unit: a reference voltage；One feedback
Contact, to receive the feedback signal；One variable resistance is coupled between the feedback contact and the reference voltage, as a result, at this
Feedback junction generates the feedback voltage for corresponding to the feedback signal, wherein the duty cycle of the switch control signal is related
In the feedback voltage；One resistance control unit, according to the DC output voltage, to determine the resistance value of the variable resistance, as a result,
In the case where different DC output voltage, different compensation is provided；And a switch control signal generation circuit, according to this time
Voltage is awarded, to generate switch control signal, determines the turn-on time of the switch.
In one embodiment, which determines also according to the sensing result to the input side electric current
The end time point of the duty cycle of the fixed switch control signal.
Below by way of specific embodiment elaborate, when be easier to understand the purpose of the present invention, technology contents, feature and its
The effect of reached.
Detailed description of the invention
Fig. 1 shows the schematic diagram of power adapter according to prior art；
Fig. 2 shows the schematic diagram of power adapter according to an embodiment of the invention；
One embodiment of Fig. 3 display switch control signal generation unit；
Fig. 4 shows one embodiment of resistance control unit；
Fig. 5 shows another embodiment of resistance control unit；
Fig. 6 shows one embodiment of feedback unit；
Fig. 7 illustrates that changing resistance value can change the effect of compensation.
Symbol description in figure
10 existing power supply converters
11 rectification units
12 isolated voltage transformation units
121 input lateral coils
122 output lateral coils
13 switches
14 feedback units
15 switch control units
20 power adapters
22 isolated voltage transformation units
221 input lateral coils
222 output lateral coils
23 switches
24 feedback units
241 optically coupled circuits
242 output voltage setup units
25 switch control units
250 switch control signals generate unit
251 resistance control units
252 comparison circuits
253 latch circuits
254 period signal generation circuits
261 branch adjustment circuits
262 compensation circuits
CS, COMP, Gate, GND, Pvo contact
C1, C2 capacitor
Ip input side electric current
Q output
R resets input
R1, R2, R3, R4 resistance
Rv variable resistance
S setting input
Sf feedback signal
Vm maps voltage
Vo DC output voltage
The related signal of Vo ' DC output voltage
Vp input side voltage
Vref reference voltage
Vs outlet side voltage
Vset goal-setting signal
Vs1 feedback voltage
Vs2 sensing voltage
Specific embodiment
For the present invention aforementioned and other technology contents, feature and effect, it is following cooperation with reference to schema one preferably
In the detailed description of embodiment, can clearly it present.The direction term being previously mentioned in following embodiment, such as: upper and lower, left,
It is right, front or rear etc., it is only the direction with reference to annexed drawings.Schema in the present invention belongs to signal, is mostly intended to indicate each device
And the function relationship between each element, it then and not according to ratio is drawn as shape, thickness and width.
Referring to Fig. 2, wherein show power adapter 20 according to an embodiment of the invention, to receive the electricity after a rectification
Pressure, and generate a DC output voltage.Rectification unit 11 is coupled to AC-input voltage, after being rectified, generates an input side
Voltage Vp.Power adapter 20 includes an isolated voltage transformation unit 22, a switch 23, a feedback unit 24 and a switch control
Unit 25 processed.Isolated voltage transformation unit 22 has an input lateral coil 221 and an output lateral coil 222, the input lateral coil 221
Rectification unit 11 is coupled to obtain input side voltage Vp, and exports the induction of lateral coil 222 input lateral coil 221 and generates one defeated
Side voltage Vs out, this outlet side voltage Vs is to generate DC output voltage Vo.Switch 23 is coupled to input lateral coil 221, with
The input side electric current Ip that control passes through input lateral coil 221.Feedback unit 24 is set according to DC output voltage Vo and a target
Signal Vset is determined, to generate a feedback signal Sf, wherein the target value of DC output voltage Vo can be with the goal-setting signal
The different set of Vset and change.Switch control unit 25 to generate a switch control signal (from contact Gate export), with
The on state of control switch 23.A reference voltage Vref is provided inside switch control unit 25, and switch control unit includes
One feedback contact COMP and a variable resistance Rv, feedback contact COMP are to receive feedback signal Sf, and feedback contact COMP is passed through
Reference voltage Vref is coupled to by variable resistance Rv, to generate at feedback contact COMP one time that corresponds to feedback signal Sf
Award voltage Vs1.Feedback voltage Vs1 is equal to reference voltage Vref and subtracts the cross-pressure on variable resistance Rv.In switch control unit 25
Unit 250 also is generated comprising a switch control signal, the duty cycle of switch control signal is determined according to feedback voltage Vs1.
According to the present invention, the resistance value of variable resistance Rv is suitable for the difference of DC output voltage Vo and adjusts, with defeated in different direct currents
Out in the case where voltage Vo, different compensation is provided.
Switch control signal generates unit 250, and there are many modes can determine that switch control is interrogated according to feedback voltage Vs2
Number duty cycle.For example, referring to Fig. 3, in an embodiment, it may include one that switch control signal, which generates unit 250,
Comparison circuit 252, a latch circuit 253 and a period signal generation circuit 254.Period signal generation circuit 254 is, for example, one
Oscillator.Switch control unit 25 is received to the sensing result of input side electric current Ip from current sense contact CS (that is, sensing voltage
Vs2).The setting input S of latch circuit 253 receives the output of period signal generation circuit 254, to determine that the conducting of switch 23 rises
Beginning time point；Comparison circuit 252 compares feedback voltage Vs1 and sensing voltage Vs2, and transmits comparison result to latch circuit 253
Input R is reseted, to determine that the conducting of switch 23 terminates time point.The output Q of latch circuit 254 generates switch control signal, with control
Make switch 23.
The foregoing is merely one of embodiments, can there is various change.It for example, also can be by feedback voltage Vs1
Compared with a slope signal, to determine that the conducting of switch 23 originates time point, and compared by sensing voltage Vs2 with a default threshold value
Compared with to determine that the conducting of switch 23 terminates time point.In short, the turn-on time of switch 23 should be with to reach the purpose of feedback control
Feedback voltage Vs1 is related.
It is aforementioned that " resistance value of variable resistance Rv is suitable for the difference of DC output voltage Vo and adjusts, in different direct currents
In the case where output voltage Vo, different compensation is provided ", it can be implemented there are many mode.It is opened in an embodiment referring to Fig. 2
Closing control unit 25 again includes a resistance control unit 251, according to DC output voltage Vo, to determine the resistance of variable resistance
Value.Relevent information in relation to DC output voltage Vo can such as, but not limited to be obtained by a contact Pvo.This contact Pvo
It can be such as, but not limited to, coupled to an auxiliary winding (not shown), to obtain the relevant information of the actual value of DC output voltage Vo.
Or this contact Pvo can also directly receive the target set point of DC output voltage Vo.
In one embodiment, refering to Fig. 4, variable resistance Rv can be a voltage-controlled variable resistance, and resistance control unit
251 map (mapping) unit comprising a voltage, and according to DC output voltage, (actual value or target are set this voltage map unit
Definite value) relevant information and generate a corresponding mapping voltage Vm, to control the resistance value of variable resistance Rv.Variable resistance Rv's
Resistance value in successional variation or can be in stepped with different DC output voltage (actual value or target set point)
(step-wise) variation；Also that is, voltage map unit can be by different DC output voltage (actual value or target set point)
Correspond different mapping voltage Vm or by different DC output voltage (actual value or target set point) a part
Correspond to different mapping voltage Vm and another part corresponds to identical mapping voltage Vm, and variable resistance Rv is a voltage control
The variable resistance of system can change its resistance value according to different mapping voltage Vm.
In one embodiment, refering to Fig. 5, variable resistance Rv may include multiple concatenated resistance and with multiple resistance accordingly
Multiple switch in parallel, and the resistance control unit 251 includes an ON-OFF control circuit, according to DC output voltage (actual value
Or target set point) relevant information and accordingly control multiple switch, to control the resistance value of variable resistance Rv.
Referring to Fig. 6, in an embodiment, feedback unit 24 may include that an optically coupled circuit 241 and output voltage setting are single
Member 242.Between ground connection, output voltage setup unit 242 include a branch adjustment circuit (Shunt regulator) 261 with
And a compensation circuit 262, branch adjustment circuit 261 is coupled between optically coupled circuit 241 and ground connection, and receives direct current output
The partial pressure (corresponding to the Vo ' in Fig. 1 and 2) and voltage setting signal Vset of voltage Vo, to determine the mesh of DC output voltage Vo
Scale value.Compensation circuit 262 is coupled to branch adjustment circuit 261, to provide compensation.It should be noted that: icon compensation circuit 262
It is only to illustrate, depending on the demand of viewing compensation, compensation circuit 262 can have different circuit structures.
Referring to Fig. 7, display is according to the present invention in an embodiment, the part-structure of power adapter, it includes resistance R1,
R2, R3, R4, Rv and capacitor C1, C2, symbol indicate that element also illustrates that the correspondence resistance value or capacitance of the element.It is general by drawing
After (Laplace Transform) is converted in Lars, the transfer function of DC output voltage Vo and feedback voltage Vs1 therein are as follows:
Wherein, CTR is the CTR current transfer ratio (Current Transfer Ratio) of optically coupled circuit.According to conversion letter
Number, it is known that if changing the resistance value of variable resistance Rv, i.e., changeable compensation.
Illustrate the present invention for preferred embodiment above, it is described above, only it is easy to those skilled in the art
Solve the contents of the present invention, interest field not for the purpose of limiting the invention.Under same spirit of the invention, those skilled in the art
Member can think and various equivalence changes.Two circuits or interelement that icon is directly connected in each embodiment, can plant does not influence to lead
Want other circuits or element of function, it is only necessary to the meaning of corresponding modification interlock circuit or signal.All this kind, all can root
Analogize according to teachings of the present invention and obtain, therefore, the scope of the present invention should cover above-mentioned and other all equivalence changes.For example, electric
Resistance control unit receives voltage control signal, to determine the resistance value etc. of variable resistance.Each embodiment above-mentioned, however it is not limited to
It is used alone, such as, but not limited to two embodiments can be also used in combination with combined application, or with the part of one of embodiment
Circuit replaces the corresponding circuits of another embodiment.
Claims (12)
1. a kind of power adapter, to receive the voltage after a rectification, and a DC output voltage is generated, which is characterized in that
Include:
One isolated voltage transformation unit has an input lateral coil and an output lateral coil, after which couples the rectification
Voltage to obtain an input side voltage, the coil-induced input lateral coil of the outlet side and generate the DC output voltage；
One switch, is coupled to the input lateral coil, to control the input side electric current for passing through the input lateral coil；
One feedback unit, according to the DC output voltage and a goal-setting signal, to generate a feedback signal, wherein this is straight
The target value of stream output voltage can change with the different set of the goal-setting signal；And
One switch control unit, to generate a switch control signal, to control the on state of the switch, the switch control list
It is first internal to provide a reference voltage and the switch control unit includes a feedback contact and a variable resistance, the feedback contact to
The feedback signal is received, this feedback contact is coupled to the reference voltage via the variable resistance, to produce in the feedback junction
The raw feedback voltage for corresponding to the feedback signal, wherein the duty cycle of the switch control signal is relevant to the feedback voltage,
And wherein, the resistance value of the variable resistance adapts to the difference of the DC output voltage and adjusts, in different DC output voltage
In the case where, different compensation is provided.
2. power adapter as described in claim 1, wherein the switch control unit is also according to the sense to the input side electric current
It surveys as a result, and determining the end time point of the duty cycle of the switch control signal.
3. power adapter as described in claim 1, wherein the switch control unit includes a resistance control unit, root again
According to the DC output voltage, to determine the resistance value of the variable resistance.
4. power adapter as claimed in claim 3, wherein the variable resistance is a voltage-controlled variable resistance, and should
Resistance control unit includes a voltage map unit, and it is corresponding that this voltage map unit according to the DC output voltage generates one
Voltage, to control the resistance value of the variable resistance.
5. power adapter as claimed in claim 3, wherein the variable resistance include multiple concatenated resistance and with it is multiple
Resistance accordingly in parallel multiple switch, and the resistance control unit includes an ON-OFF control circuit, according to the direct current output
The sensing result of voltage and accordingly control multiple switch, to control the resistance value of the variable resistance.
6. power adapter as described in claim 1, wherein the feedback unit includes an optically coupled circuit.
7. power adapter as claimed in claim 6, wherein the feedback unit includes an output voltage setup unit, coupling again
It is connected to the optically coupled circuit, which determines the mesh of the DC output voltage according to a goal-setting signal
Scale value.
8. power adapter as claimed in claim 7, wherein the output voltage setup unit includes the branch being coupled against each other
Adjustment circuit and a compensation circuit.
9. a kind of switch control unit is applied to a power adapter, after wherein the power adapter is to receive a rectification
Voltage, and a DC output voltage is generated, which includes: an isolated voltage transformation unit, has an input lateral coil
With an output lateral coil, which couples the voltage after the rectification to obtain an input side voltage, the output lateral coil
Incude the input lateral coil and generates the DC output voltage；One switch is to control the input side electricity by the input lateral coil
Stream；And a feedback unit, according to the DC output voltage and a goal-setting signal, to generate a feedback signal, wherein should
The target value of DC output voltage can change with the different set of the goal-setting signal, and the switch control unit is to control
The switch, which is characterized in that this switch control unit includes:
One reference voltage；
One feedback contact, to receive the feedback signal；
One variable resistance is coupled between the feedback contact and the reference voltage, is corresponded to as a result, in feedback junction generation
One feedback voltage of the feedback signal, wherein the turn-on time of the switch is relevant to the feedback voltage；
One resistance control unit, according to the DC output voltage, to determine the resistance value of the variable resistance, as a result, different straight
In the case where flowing output voltage, different compensation is provided；And
One switch control signal generation circuit, to generate switch control signal, determines the conducting of the switch according to the feedback voltage
Time.
10. switch control unit as claimed in claim 9, wherein the switch control signal generation circuit is also according to defeated to this
Enter the sensing result of side electric current, and determines the end time point of the duty cycle of the switch control signal.
11. switch control unit as claimed in claim 9, wherein the variable resistance is a voltage-controlled variable resistance, and
The resistance control unit includes a voltage map unit, this voltage map unit is according to the sensing result to the DC output voltage
And a corresponding voltage is generated, to control the resistance value of the variable resistance.
12. switch control unit as claimed in claim 9, wherein the variable resistance includes multiple concatenated resistance and and should
Multiple resistance accordingly in parallel multiple switch, and the resistance control unit includes an ON-OFF control circuit, according to the direct current
The sensing result of output voltage and accordingly control multiple switch, to control the resistance value of the variable resistance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562169116P | 2015-06-01 | 2015-06-01 | |
| US62/169,116 | 2015-06-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106208707A CN106208707A (en) | 2016-12-07 |
| CN106208707B true CN106208707B (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610176706.2A Active CN106208707B (en) | 2015-06-01 | 2016-03-25 | Power adapter and switch control unit therein |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106208707B (en) |
| TW (1) | TWI587619B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10630167B2 (en) * | 2018-02-06 | 2020-04-21 | Infineon Technologies Austria Ag | Adaptive loading techniques to avoid negative voltage slope and output overshoot during system start-up |
| CN112491390A (en) * | 2020-12-30 | 2021-03-12 | 兰州大学 | Active variable resistor |
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|---|---|---|---|---|
| JPH08154047A (en) * | 1994-11-25 | 1996-06-11 | Sunx Ltd | Detection switch |
| CN1848640A (en) * | 2005-04-14 | 2006-10-18 | 三星Sdi株式会社 | Plasma display device, power device thereof, and driving method thereof |
| JP2009148112A (en) * | 2007-12-17 | 2009-07-02 | Daikin Ind Ltd | Power switching circuit |
| CN102957309A (en) * | 2011-08-26 | 2013-03-06 | 立锜科技股份有限公司 | Frequency jitter control circuit and method of PFM power supply |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080291723A1 (en) * | 2007-05-23 | 2008-11-27 | Wang Daniel C | Source biasing of nor-type flash array with dynamically variable source resistance |
| TWI452810B (en) * | 2011-11-08 | 2014-09-11 | Richtek Technology Corp | Mixed mode compensation circuit and method for a power converter |
| TW201414146A (en) * | 2012-09-21 | 2014-04-01 | Anwell Semiconductor Corp | Power conversion control chip and device thereof |
| TWI523391B (en) * | 2014-02-14 | 2016-02-21 | 立錡科技股份有限公司 | Mixed mode compensation circuit |
-
2016
- 2016-03-17 TW TW105108226A patent/TWI587619B/en active
- 2016-03-25 CN CN201610176706.2A patent/CN106208707B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08154047A (en) * | 1994-11-25 | 1996-06-11 | Sunx Ltd | Detection switch |
| CN1848640A (en) * | 2005-04-14 | 2006-10-18 | 三星Sdi株式会社 | Plasma display device, power device thereof, and driving method thereof |
| JP2009148112A (en) * | 2007-12-17 | 2009-07-02 | Daikin Ind Ltd | Power switching circuit |
| CN102957309A (en) * | 2011-08-26 | 2013-03-06 | 立锜科技股份有限公司 | Frequency jitter control circuit and method of PFM power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106208707A (en) | 2016-12-07 |
| TW201703412A (en) | 2017-01-16 |
| TWI587619B (en) | 2017-06-11 |
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