CN104600993B - Switch the system and method generated with voltage for source electrode - Google Patents
Switch the system and method generated with voltage for source electrode Download PDFInfo
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- CN104600993B CN104600993B CN201410852932.9A CN201410852932A CN104600993B CN 104600993 B CN104600993 B CN 104600993B CN 201410852932 A CN201410852932 A CN 201410852932A CN 104600993 B CN104600993 B CN 104600993B
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping 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
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses the system and method switched for source electrode and voltage is generated.System and method for adjusting power converting system.A kind of example system controller for being used to adjust power converting system includes：First controller terminal of the first transistor terminal that is associated with the first controller voltage and being coupled to the first transistor, the first transistor also includes second transistor terminal and third transistor terminal, and second transistor terminal is coupled to the armature winding of power converting system；Second controller terminal that is associated with second controller voltage and being coupled to third transistor terminal；And the threeth controller terminal associated with the 3rd controller voltage.First controller voltage is equal to first voltage difference and the 3rd controller voltage sum.Second controller voltage is equal to second voltage difference and the 3rd controller voltage sum.
Description
The application is Application No. 201210564309.4, the applying date to be on December 21st, 2012, entitled " cut for source electrode
Change with voltage generate system and method " application for a patent for invention divisional application.
Technical field
The present invention relates to integrated circuit.More specifically, the invention provides switch (source for source electrode
Switching) and/or builtin voltage generation system and method.Merely exemplary, the present invention is applied to power conversion system
System.It will be appreciated that the present invention has wider application.
Background technology
Traditional switched-mode power supply realizes gate switching commonly using high-voltage power MOSFET.But, for so
The high-voltage starting circuit of switched-mode power supply be typically to utilize expensive high-voltage semi-conductor technique manufacture.In addition, traditional
Switched-mode power supply is often subjected to slow startup and high stand-by power consumption.
Therefore, the handover scheme for improving power converting system becomes extremely important.
The content of the invention
The present invention relates to integrated circuit.More specifically, the invention provides for source electrode switching and/or builtin voltage generation
System and method.Merely exemplary, the present invention is applied to power converting system.It will be appreciated that the present invention has
Wider application.
According to one embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and second transistor terminal is coupled to power supply
The armature winding of transformation system；Second controller terminal, the second controller terminal simultaneously quilt associated with second controller voltage
It is coupled to third transistor terminal；And the 3rd controller terminal, the 3rd controller terminal is related to the 3rd controller voltage
Connection.First controller voltage is equal to first voltage difference and the 3rd controller voltage sum.Second controller voltage is equal to the second electricity
Pressure difference and the 3rd controller voltage sum.System controller is configured as making first voltage difference keep constant, and changes second
Voltage difference, the primary current of armature winding is flowed through with or off the first transistor and influence.
According to second embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and second transistor terminal is coupled to power supply
The armature winding of transformation system；Second controller terminal, the second controller terminal simultaneously quilt associated with second controller voltage
It is coupled to the first capacitor terminal of third transistor terminal and the first capacitor；With the 3rd controller terminal, the 3rd control
Device terminal is associated with the 3rd controller voltage.The system controller includes：Second transistor, the second transistor includes the 4th
Transistor terminal, the 5th transistor terminal and the 6th transistor terminal, the 5th transistor terminal are coupled to second controller end
Son；And the first clamper component, the first clamper component includes first assembly terminal and the second pack terminals, first assembly terminal
It is coupled to the first controller terminal.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and second transistor terminal is coupled to power supply
The armature winding of transformation system；Second controller terminal, the second controller terminal simultaneously quilt associated with second controller voltage
Third transistor terminal is coupled to, second controller terminal is also coupled to the first capacitor of the first capacitor by diode
Terminal；And the 3rd controller terminal, the 3rd controller terminal is associated with the 3rd controller voltage.The system controller is also
Including：Second transistor, the second transistor includes the 4th transistor terminal, the 5th transistor terminal and the 6th crystal pipe end
Son, the 5th transistor terminal is coupled to second controller terminal；And diode, including anode terminal and cathode terminal, it is cloudy
Extreme son is coupled to the first capacitor terminal, and anode terminal is coupled to second controller terminal.The system controller by with
It is set to and is charged in response to one or more current spikes by the capacitor of diode pair first.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and second transistor terminal is coupled to power supply
The armature winding of transformation system；Second controller terminal, the second controller terminal simultaneously quilt associated with second controller voltage
It is coupled to third transistor terminal；And the 3rd controller terminal, the 3rd controller terminal is related to the 3rd controller voltage
Connection.The system controller also includes：4th controller terminal, the 4th controller terminal is associated simultaneously with the 4th controller voltage
The first capacitor terminal of capacitor is coupled to, capacitor also includes the second capacitor end for being coupled to the 3rd controller terminal
Son；Second transistor, the second transistor includes the 4th transistor terminal, the 5th transistor terminal and the 6th transistor terminal,
5th transistor terminal is coupled to second controller terminal；And switch, it is configured as receiving control signal and including the
One switch terminal and second switch terminal, first switch terminal are coupled to second controller terminal, and second switch terminal is by coupling
Close to the first controller terminal.If the system controller is configured as when second transistor is turned on and if the 4th controller
When voltage is less than first threshold, then closure switch.
In one embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and third transistor terminal is coupled to power supply
The armature winding of transformation system；Second transistor, the second transistor include the 4th transistor terminal, the 5th transistor terminal and
6th transistor terminal, the 5th transistor terminal is coupled to first resistor device；And the first clamper component, it is coupled to the 4th
Transistor terminal.First clamper component is configured as receiving the electric current associated with the first controller voltage, at least based on electricity
The associated information generation reference voltage of stream, and the 4th transistor terminal is biased to reference voltage with the 5th crystal pipe end
Supply voltage is generated at son.
In another embodiment, a kind of method for adjusting power converting system, the power converting system includes having
The system controller of first controller terminal, second controller terminal and the 3rd controller terminal, this method includes：Generation and the
The first associated controller voltage of one controller terminal, the first controller terminal is coupled to the first crystal of the first transistor
Pipe end, the first transistor also includes second transistor terminal and third transistor terminal, and second transistor terminal is coupled to
The armature winding of power converting system；Generate second associated with the second controller terminal for being coupled to third transistor terminal
Controller voltage；And the generation threeth controller voltage associated with the 3rd controller terminal.This method also includes：Processing with
The associated information of first controller voltage, second controller voltage and the 3rd controller voltage, the first controller voltage is equal to
First voltage difference with the 3rd controller voltage sum, second controller voltage be equal to second voltage difference with the 3rd controller voltage it
With；First voltage difference is set to keep constant；And change second voltage is poor, flowed through just with or off the first transistor and influence
The primary current of level winding.
In another embodiment, a kind of method for adjusting power converting system, the power converting system includes having
The system controller of controller terminal, this method includes：The generation controller voltage associated with controller terminal, controller end
Son is coupled to the first transistor terminal of the first transistor, and the first transistor also includes second transistor terminal and the 3rd crystal
Pipe end, third transistor terminal is coupled to the armature winding of power converting system；Generation is associated with controller voltage
Electric current；The 4th transistor terminal of second transistor is at least biased to by reference voltage based on the information associated with electric current, the
Two-transistor also includes the 5th transistor terminal and the 6th transistor terminal, and the 6th transistor terminal is coupled to resistor；With
And supply voltage is at least generated at the 5th transistor terminal based on the information associated with reference voltage.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：Controller terminal, should
Controller terminal is associated with controller voltage and is coupled to the first transistor terminal of the first transistor, and the first transistor is also
Including second transistor terminal and third transistor terminal, third transistor terminal be coupled to power converting system it is primary around
Group；First resistor device, the first resistor device is coupled to controller terminal；And clamper component, the clamper component is coupled to
First resistor device.Clamper component is configured as receiving the electric current associated with controller voltage from first resistor device, is at least based on
Associated with electric current information generation reference voltage, and by reference voltage output to pressure regulator.
According to another embodiment, a kind of method for adjusting power converting system, the power converting system includes having
The system controller of controller terminal, this method includes：The generation controller voltage associated with controller terminal, controller end
Son is coupled to the first transistor terminal of the first transistor, and the first transistor also includes second transistor terminal and the 3rd crystal
Pipe end, third transistor terminal is coupled to the armature winding of power converting system；Generation is associated with controller voltage
Electric current, electric current flows through the resistor for being coupled to controller terminal；Reference voltage is at least generated based on the information associated with electric current；
And by reference voltage output to pressure regulator.
Compared to conventional art, by the way that present invention obtains many benefits.For example, some embodiments of the present invention are provided
The scheme of source electrode switching is carried out using the internal transistor in system controller.In another example, some implementations of the invention
Example, which is provided, to be used to being reduced to under-voltage locking (UVLO) threshold voltage into the system and method for example close to internal supply voltage.
In another example, some embodiments of the present invention, which are provided, to be used to rapidly capacitor is charged with utilizing during startup is handled
The conduction electric current of transistor is come the system and method that provide supply voltage.
Depending on embodiment, one or more benefits can be obtained.Can be comprehensive with reference to following detailed description and drawings
Ground understands these benefits and each other objects, features and advantages of the present invention.
Brief description of the drawings
Fig. 1 is to show the power conversion system with source electrode switching and/or builtin voltage generation according to embodiments of the present invention
The simplification diagram of system.
Fig. 2 is to show certain in the controller 102 according to embodiments of the present invention as the part of power converting system 100
The simplification diagram of a little components.
Fig. 3 (a) is to show the controller according to another embodiment of the present invention as the part of power converting system 100
The simplification diagram of some of 102 components.
Fig. 3 (b) is to show the controller according to another embodiment of the present invention as the part of power converting system 100
The simplification diagram of some of 102 components.
Fig. 4 is shown in the controller 102 as the part of power converting system 100 according to further embodiment of this invention
Some components simplification diagram.
Fig. 5 is shown in the controller 102 as the part of power converting system 100 according to further embodiment of this invention
Some components simplification diagram.
Embodiment
The present invention relates to integrated circuit.More specifically, the invention provides for source electrode switching and/or builtin voltage generation
System and method.Merely exemplary, the present invention is applied to power converting system.It will be appreciated that the present invention has
Wider application.
Fig. 1 is to show the power conversion system with source electrode switching and/or builtin voltage generation according to embodiments of the present invention
The simplification diagram of system.The diagram is only example, and it should not undeservedly limit the scope of claim.Those skilled in the art
It will be recognized that many variants, substitutions and modifications.
Power converting system 100 includes controller 102, armature winding 142, secondary windings 144, assists winding 146, switch
122nd, capacitor 120,128,134,150,154 and 158, resistor 124,130,132,136 and 152 including diode 160,
162,164 and 166 full-wave rectification bridge and diode 126,148 and 156.Controller 102 include terminal 104,106,108,
110th, 112,114,116 and 118.For example, system 100 provides electric power to one or more light emitting diodes.In another example,
Switch 122 is transistor.In another example, switch 122 is field-effect transistor (for example, metal oxide semiconductcor field effect
Answer transistor), it include terminal 174 (for example, drain terminal), terminal 176 (for example, gate terminal) and terminal 178 (for example,
Source terminal).
According to one embodiment, transistor 122 is based on voltage signal 182 and the end at terminal 176 (for example, gate terminal) place
The difference of the voltage signal 180 at sub 178 (for example, source terminal) places and turn on and end.In another example, system 100 passes through
The voltage signal 180 for changing terminal 178 (for example, source terminal) place to perform transistor 122 source electrode switching.In another example
In, system 100 is by making the voltage signal 182 at terminal 176 keep constant and changing terminal 178 (for example, source terminal)
The voltage signal 180 at place to perform transistor 122 source electrode switching.In another example, (the example of terminal 174 of transistor 122
Such as, drain terminal) be either directly or indirectly connected to armature winding 142, and transistor 122 terminal 176 (for example, grid
Extreme son) it is connected to terminal 116 (for example, terminal GATE).In another example, the terminal 178 of transistor 122 is (for example, source
Extreme son) it is connected to terminal 118 (for example, terminal SW).
As shown in figure 1, in certain embodiments, including the full-wave rectification bridge processing of diode 160,162,164 and 166 comes
From the AC input signal of AC provisioning components 170, and generate voltage signal 172.For example, the size of voltage signal 182 in response to
Increased by the voltage signal 172 of capacitor 120 and resistor 124, and be finally reached predefined size.In another example
In, voltage signal 182 is fixed to the predefined size.In another example, if voltage signal 182 and voltage signal 180 it
Difference is more than threshold value, then transistor 122 is turned on.In another example, electric current 184 flow through transistor 122 enter terminal 118 (for example,
Terminal SW), and terminal 112 (for example, terminal VDD) is flowed out to be charged to capacitor 128, so as to provide confession for controller 102
Piezoelectric voltage.
In another embodiment, system 100 is that controller 102 performs builtin voltage generation.For example, when controller 102 is opened
During beginning normal operating, the capacitor 120 being electrically charged provides internal current to generate internal supply voltage for controller 102.
In another example, the internal supply voltage generated is about 5V.In another example, terminal 112 (for example, terminal VDD) place
Supply voltage signal 198 can be low as internal supply voltage.
Fig. 2 is to show certain in the controller 102 according to embodiments of the present invention as the part of power converting system 100
The simplification diagram of a little components.The diagram is only example, and it should not undeservedly limit the scope of claim.Art technology
Personnel will be recognized that many variants, substitutions and modifications.Controller 102 include voltage clamp 188 (for example, Zener diode),
Diode 186, actuator assembly 190 and switch 192.For example, switch 192 is transistor.In another example, switch 192 is
Field-effect transistor (for example, MOSFET).
As shown in Fig. 2 according to some embodiments, actuator assembly 190 influences the voltage at the terminal 193 of transistor 192
Signal 194 is with or off transistor 192.For example, when transistor 192 ends, transistor 122 ends.In another example
In, when transistor 192 is turned on, the voltage 196 at terminal 110 is approximately equal to voltage signal 180, and passes through voltage signal
182 and voltage signal 180 difference be more than threshold value when, transistor 122 is turned on.In another example, during startup is handled, electric capacity
Device 120 is electrically charged in response to voltage signal 172 and the size of voltage signal 182 increases.In certain embodiments, once voltage
Signal 182 reaches predefined size, then voltage clamp 188 is just by the clamper of voltage signal 182 (for example, fixed) in predefined size
(for example, breakdown voltage of voltage clamp 188).For example, in certain embodiments, it is by the clamper of voltage clamp 188.Example
Such as, the characteristic of voltage clamp 188 influences the predefined size (for example, 18V).In another example, the maximum of voltage signal 180
Value is equal to voltage signal 182 and the pressure drop sum on diode 186 in size.In another example, in the normal operation period,
Capacitor 120 continue to electric charge (for example, to be freed from spike caused by the switch of transistor 122 and transistor 192) so as to
Voltage signal 182 is set to keep constant or substantial constant.
Fig. 3 (a) is to show the controller according to another embodiment of the present invention as the part of power converting system 100
The simplification diagram of some of 102 components.The diagram is only example, and it should not undeservedly limit the scope of claim.
It would be recognized by those skilled in the art that many variants, substitutions and modifications.Controller 102 includes voltage clamp 202 (for example, neat
Receive diode), diode 204 and 212, actuator assembly 206, switch 208, under-voltage locking and low voltage difference output (UVLO＆LDO)
Component 210, resistor 213 and switch 214.For example, switch 208 is transistor.In another example, switch 208 is field-effect
Transistor (for example, MOSFET).
As shown in Fig. 3 (a), according to some embodiments, the terminal 218 of the influence transistor 208 of actuator assembly 206 (for example,
Gate terminal) place voltage signal 216 so as on or off transistor 208.For example, the state of transistor 122 is (for example, lead
Logical or cut-off) it is on or off depending on transistor 208.In another example, during startup is handled, voltage signal
182 size increases in response to the voltage signal 172 by resistor 124 and capacitor 120.In certain embodiments, one
Denier voltage signal 182 reaches predefined size, then voltage clamp 202 (for example, Zener diode) is just by the clamper of voltage signal 182
(for example, fixed) is in the predefined size (for example, breakdown voltage of voltage clamp 202).For example, the spy of voltage clamp 202
Property influences the predefined size (for example, 18V).
In one embodiment, when the difference of voltage signal 182 and voltage signal 180 is more than threshold value, transistor 122 starts
Electric current 174 is conducted, electric current 174 flows through terminal 118 (for example, terminal SW).In another example, if switch 214 in response to
The signal 222 (for example, porB) that UVLO＆LDO components 210 are generated) and close (for example, connection), then electric current 172 flows through two poles
Pipe 212 and switch to capacitor 128 214 to charge, and the voltage signal 224 at terminal 112 (for example, terminal VDD) place is big
Small increase.In another example, when the size of voltage signal 224 is more than first predetermined threshold voltage (for example, upper limit threshold),
UVLO＆LDO components 210 change signal 222 to disconnect (for example, shut-off) switch 214.In another example, if voltage signal
224 size drops under the second predetermined threshold voltage (for example, lower threshold), then UVLO＆LDO components 210 change signal
222 to close (for example, connection) switch 214, so as to be charged again to capacitor 128.In another example, electric current 172 is at least
Limited by the resistor 213 being coupled between terminal 118 (for example, terminal SW) and terminal 112 (for example, terminal VDD).
In another example, the maximum of voltage signal 180 is equal to voltage signal 182 and the pressure drop sum on diode 204 in size.
In another example, the first predetermined threshold voltage and the second predetermined threshold voltage are similar and different.Resistor 213 is in some realities
Apply in example and be omitted.
In another embodiment, assists winding 146 is removed, and switch 214 is always maintained at connecting.In another embodiment
In, assists winding 146 and switch 214 are removed, and diode 212 is coupled between terminal 118 and terminal 112.For example,
In the case of no assists winding 146, the supply voltage of controller 102 is provided by transistor 122.In another example
In, switch 214 is realized using p-channel field-effect transistor (for example, p-channel mos field effect transistor)
's.
Fig. 3 (b) is to show the controller as the part of power converting system 100 according to further embodiment of this invention
The simplification diagram of some of 102 components.The diagram is only example, and it should not undeservedly limit the scope of claim.
It would be recognized by those skilled in the art that many variants, substitutions and modifications.Controller 102 includes voltage clamp 202 (for example, neat
Receive diode), diode 204 and 212, actuator assembly 206, transistor 208, under-voltage locking and low voltage difference output (UVLO＆
LDO) component 210, resistor 213 and switch 214.In addition, controller 102 includes current source 230 and diode 232.For example, opening
It is field-effect transistor (for example, MOSFET) to close 208.
According to one embodiment, the voltage signal 182 of terminal 176 (for example, gate terminal of transistor 122) is retained as
Not less than predetermined level.For example, diode 232 has forward voltage (for example, Vf).In another example, in power conversion system
During the normal operating of system 100, the voltage signal 224 at terminal 112 (for example, terminal VDD) place is not less than under-voltage locking voltage (example
Such as, VUVLO).Therefore, according to some embodiments, the minimum value of voltage signal 182 is determined as follows：
VGATE≥VUVLO–Vf (1)
Wherein VGATERepresent voltage signal 182.For example, when the size of voltage signal 182 less than voltage signal 224 subtracts two
During the forward voltage of pole pipe 232, capacitor 120 is electrically charged in response to electric current 234, and electric current 234 is from terminal 112 (for example, terminal
VDD) terminal 116 (for example, terminal GATE) is flowed to by diode 232.
Fig. 4 is shown in the controller 102 as the part of power converting system 100 according to further embodiment of this invention
Some components simplification diagram.The diagram is only example, and it should not undeservedly limit the scope of claim.This area
Technical staff will be recognized that many variants, substitutions and modifications.Controller 102 includes voltage clamp 302 and 332, diode 304
With 312, actuator assembly 306, switch 308 and 334, under-voltage locking (UVLO) component 310, switch 314, the and of resistor 330
336.For example, switch 308 and 334 is transistor.In another example, switch 308 be field-effect transistor (for example,
MOSFET).In another example, switch 334 is field-effect transistor (for example, MOSFET).
As shown in figure 4, according to some embodiments, the terminal 318 of the influence transistor 308 of actuator assembly 306 is (for example, grid
Extreme son) place voltage signal 316 so as on or off transistor 308.For example, the state of transistor 122 is (for example, conducting
Or cut-off) be on or off depending on transistor 308.In another example, during startup is handled, voltage signal 182
Size increase in response to the voltage signal 172 by resistor 124 and capacitor 120.In certain embodiments, once it is electric
Pressure signal 182 reaches predefined size, then voltage clamp 302 is just predetermined big at this by the clamper of voltage signal 182 (for example, fixed)
Small (for example, breakdown voltage of voltage clamp 302).
In one embodiment, when the difference of voltage signal 182 and voltage signal 180 is more than threshold value, transistor 122 starts
Electric current 174 is conducted, electric current 174 flows through terminal 118 (for example, terminal SW).In another example, if switch 314 in response to
The signal 322 (for example, porB) that UVLO components 310 are generated) and close (for example, connection), then electric current 172 flows through diode
312 and switch 314 to be charged to capacitor 128, and the size of the voltage signal 324 at terminal 112 (for example, terminal VDD) place
Increase.In another example, when the size of voltage signal 324 is more than first predetermined threshold voltage (for example, upper limit threshold),
UVLO components 310 change signal 322 to disconnect (for example, shut-off) switch 314.In another example, if voltage signal 324
Size drops under the second predetermined threshold voltage (for example, lower threshold), then UVLO components 310 change signal 322 to close
(for example, connection) switch 314, so as to be charged again to capacitor 128.In another example, the first predetermined threshold voltage with
Second predetermined threshold voltage is similar and different.
In another embodiment, when controller 102 starts normal operating, the capacitor 120 being electrically charged provides electric current
350, electric current 350 flows through resistor 330.For example, being generated in response to the electric current 350 that voltage clamp 332 is flowed to from resistor 330
Reference voltage signal 352 is (for example, Vref).In certain embodiments, reference voltage signal 352 is provided to pressure regulator as ginseng
Examine level.For example, pressure regulator includes transistor 334, transistor 334 is configured to source follower.In another example, refer to
Voltage signal 352 is (for example, Vref) be generated at terminal 354 (for example, gate terminal) place of transistor 334.In another example
In, once voltage signal 352 is (for example, Vref) reaching predefined size, then voltage clamp 332 is just by the clamper of voltage signal 352
(for example, fixed) is in the predefined size (for example, breakdown voltage of voltage clamp 332).In another example, if transistor
334 conductings, then voltage signal 356 (for example, AVDD) is generated by resistor 336 at the terminal 358 of transistor 334.
In another example, voltage signal 356 (for example, AVDD) be used to provide internal supply voltage for controller 102.In another example
In, signal 356 (for example, AVDD) is the internal signal of controller 102, for example, internal supply voltage.
VAVDD=Vref–Vth (2)
Wherein, VrefRepresent reference voltage signal 352, VthRepresent the threshold voltage of transistor 334.
For example, the breakdown voltage of voltage clamp 332 (for example, Zener diode) is about 6V, and transistor 334
Threshold voltage is about 1V.In certain embodiments, voltage signal 356 is generated as about 5V.Even if for example, voltage signal
324 be that about 5V is so low, and transistor 334 still can generate about 5V voltage signal by being operated in the range of linearity
356.Therefore, in certain embodiments, the second predetermined threshold voltage (for example, lower threshold) of UVLO components 310 can be subtracted
Small is low size (for example, 5V).
In another embodiment, in the normal operation period, capacitor 120 is in response in the every of transistor 308 (for example, M2)
During secondary switch by diode 304 (for example, D2) generate spike and be electrically charged, so as to make voltage signal 182 keep it is constant or
Substantial constant.For example, there is resistor 124 big resistance to reduce power attenuation.In another example, spike is mainly in crystalline substance
Body pipe 308 is generated when ending.
Fig. 5 is to show the controller 102 as the part of power converting system 100 according to further embodiment of this invention
The simplification diagram of primary clustering.The diagram is only example, and it should not undeservedly limit the scope of claim.This area skill
Art personnel will be recognized that many variants, substitutions and modifications.Controller 402 includes Zener diode 402,432 and 462, diode
404 and 412, actuator assembly 406, transistor 408 and 434, under-voltage locking (UVLO) component 410, switch 414,464,466 and
468 and resistor 430 and 436.For example, transistor 408 is field-effect transistor (for example, MOSFET).In another example
In, transistor 434 is field-effect transistor (for example, MOSFET).
As shown in figure 5, according to some embodiments, the terminal 418 of the influence transistor 408 of actuator assembly 406 is (for example, grid
Extreme son) place voltage signal 416 with or off transistor 408.For example, transistor 122 state (for example, conducting or
Cut-off) it is on or off depending on transistor 408.In another example, during startup is handled, voltage signal 182
Size increases in response to the voltage signal 172 by resistor 124 and capacitor 120.In certain embodiments, once voltage
Signal 182 reaches predefined size, then it is at least by the clamper of Zener diode 402 (for example, fixed).For example, starting process phase
Between, the size of the voltage signal 424 at terminal 112 (for example, terminal VDD) place is less than the first predetermined threshold voltage (for example, upper limit threshold
Value), and the generation signal 422 of UVLO components 410 (for example, porB) is to close (for example, connection) switch 414 and 464, and it is raw
Into signal 470 (for example, por) 466 and 468 are switched to disconnect (for example, shut-off).In another example, when signal 422 is logic
During high level, signal 470 is logic low, and when signal 422 is logic low, signal 470 is logic high.
In one embodiment, when the difference of voltage signal 182 and voltage signal 180 is more than threshold value, transistor 122 starts
Electric current 174 is conducted, electric current 174 flows through terminal 118 (for example, terminal SW).In another example, if switch 414 is in response to letter
Number 422 (for example, porB)) and close (for example, connection), then electric current 172 flows through diode 412 and switch 414 with to capacitor
128 chargings, and the size increase of the voltage signal 424 at terminal 112 (for example, terminal VDD) place.In another example, work as electricity
When pressing the size of signal 424 more than the first predetermined threshold voltage, UVLO components 410 change signal 422 to disconnect (for example, shut-off)
Switch 414.In another example, if the size of voltage signal 424 drops to the second predetermined threshold voltage (for example, lower limit threshold
Value) under, then UVLO components 410 change signal 422 to close (for example, connection) switch 414, so that again to capacitor 128
Charging.In another example, if the size of voltage signal 424 is more than the first predetermined threshold voltage, switch 466 in response to
Signal 470 that UVLO components 410 are generated and close (for example, connection), and voltage signal 182 is by the clamper of Zener diode 402
(for example, fixed).In another example, if the size of voltage signal 424 drops to below the second predetermined threshold voltage, open
Close 466 and (for example, shut-off) is disconnected in response to the signal 470 that UVLO components 410 are generated, and voltage signal 182 is by Zener two
Pole pipe 402 and the clamper of Zener diode 462 (for example, fixed).In another example, the first predetermined threshold voltage and second pre-
Determine threshold voltage similar and different.
In another embodiment, when 102 normal operating of controller, if the size of voltage signal 424 is pre- more than first
Determine threshold voltage, then switch 468 and (for example, connection) is closed in response to the signal 470 that UVLO components 410 are generated, and switch
464 disconnect (for example, shut-off) in response to signal 422.In another example, the capacitor 120 being electrically charged provides electric current 450,
Electric current 450 flows through resistor 430.For example, generating reference in response to the electric current 450 that voltage clamp 432 is flowed to from resistor 430
Voltage signal 452 is (for example, Vref).In certain embodiments, reference voltage signal 452 is provided to pressure regulator as with reference to electricity
It is flat.For example, pressure regulator includes transistor 434, transistor 434 is configured to source follower.In another example, reference voltage
Signal 452 is generated at terminal 454 (for example, gate terminal) place of transistor 434.In another example, if transistor 434
Conducting, then voltage signal 456 (for example, AVDD) is generated by resistor 436 at the terminal 458 of transistor 434.Another
In example, signal 456 (for example, AVDD) is the internal signal of controller 102, for example, internal supply voltage.
VAVDD=Vref–Vth (3)
Wherein, VrefRepresent reference voltage signal 452, VthRepresent the threshold voltage of transistor 434.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and the second transistor terminal is by coupling
Close the armature winding of power converting system；Second controller terminal, the second controller terminal and second controller voltage phase
Associate and be coupled to the third transistor terminal；And the 3rd controller terminal, the 3rd controller terminal and the 3rd control
Device voltage processed is associated.It is poor with the 3rd controller voltage sum that the first controller voltage is equal to first voltage.It is described
It is poor with the 3rd controller voltage sum that second controller voltage is equal to second voltage.The system controller is configured as making
First voltage difference keeps constant, and it is poor to change the second voltage, with the simultaneously shadow of the first transistor described on or off
Ring the primary current for flowing through the armature winding.For example, the system controller is according to Fig. 1, Fig. 2, Fig. 3 (a), Fig. 3 (b), Fig. 4
And/or Fig. 5 is realized.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and the second transistor terminal is by coupling
Close the armature winding of power converting system；Second controller terminal, the second controller terminal and second controller voltage phase
Associate and be coupled to the first capacitor terminal of the third transistor terminal and the first capacitor；With the 3rd controller end
Son, the 3rd controller terminal is associated with the 3rd controller voltage.The system controller includes：Second transistor, this second
Transistor includes the 4th transistor terminal, the 5th transistor terminal and the 6th transistor terminal, the 5th transistor terminal quilt
It is coupled to the second controller terminal；And the first clamper component, the first clamper component includes first assembly terminal and the
Two pack terminals, the first assembly terminal is coupled to the first controller terminal.For example, the system controller at least root
Realized according to Fig. 2, Fig. 3 (a), Fig. 3 (b), Fig. 4 and/or Fig. 5.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and the second transistor terminal is by coupling
Close the armature winding of power converting system；Second controller terminal, the second controller terminal and second controller voltage phase
Associate and be coupled to the third transistor terminal, the second controller terminal is also coupled to the first electricity by diode
First capacitor terminal of container；And the 3rd controller terminal, the 3rd controller terminal is related to the 3rd controller voltage
Connection.The system controller also includes：Second transistor, the second transistor includes the 4th transistor terminal, the 5th crystal pipe end
Son and the 6th transistor terminal, the 5th transistor terminal are coupled to the second controller terminal；And two pole
Pipe, including anode terminal and cathode terminal, the cathode terminal are coupled to first capacitor terminal, the anode terminal
It is coupled to the second controller terminal.The system controller is configured to respond to one or more current spikes and passes through institute
The first capacitor described in diode pair is stated to charge.For example, the system controller is according at least to Fig. 2, Fig. 3 (a), Fig. 3 (b), Fig. 4
And/or Fig. 5 is realized.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and the second transistor terminal is by coupling
Close the armature winding of power converting system；Second controller terminal, the second controller terminal and second controller voltage phase
Associate and be coupled to the third transistor terminal；And the 3rd controller terminal, the 3rd controller terminal and the 3rd control
Device voltage processed is associated.The system controller also includes：4th controller terminal, the 4th controller terminal and the 4th controller
Voltage is associated and is coupled to the first capacitor terminal of capacitor, and the capacitor also includes being coupled to the 3rd control
Second capacitor terminal of device terminal；Second transistor, the second transistor includes the 4th transistor terminal, the 5th crystal pipe end
Son and the 6th transistor terminal, the 5th transistor terminal are coupled to the second controller terminal；And switch, by with
It is set to reception control signal and including first switch terminal and second switch terminal, the first switch terminal is coupled to institute
Second controller terminal is stated, the second switch terminal is coupled to the first controller terminal.The system controller by with
If when being set to the second transistor conducting and if when the 4th controller voltage is less than first threshold, closing institute
State switch.For example, the system controller is realized according at least to Fig. 3 (a), Fig. 3 (b), Fig. 4 and/or Fig. 5.
In one embodiment, a kind of system controller for being used to adjust power converting system includes：First controller end
Son, the first controller terminal is associated with the first controller voltage and is coupled to the first crystal pipe end of the first transistor
Son, the first transistor also includes second transistor terminal and third transistor terminal, and the third transistor terminal is by coupling
Close the armature winding of power converting system；Second transistor, the second transistor includes the 4th transistor terminal, the 5th crystal
Pipe end and the 6th transistor terminal, the 5th transistor terminal are coupled to first resistor device；And the first clamper component,
It is coupled to the 4th transistor terminal.First clamper component is configured as receiving associated with the first controller voltage
Electric current, reference voltage is at least generated based on the information associated with the electric current, and the 4th transistor terminal is inclined
The reference voltage is set to generate supply voltage at the 5th transistor terminal.For example, the system controller at least root
Realized according to Fig. 4 and/or Fig. 5.
In another embodiment, a kind of method for adjusting power converting system, the power converting system includes having
The system controller of first controller terminal, second controller terminal and the 3rd controller terminal, this method includes：Generation and institute
The first associated controller voltage of the first controller terminal is stated, the first controller terminal is coupled to the first transistor
The first transistor terminal, the first transistor also includes second transistor terminal and third transistor terminal, and described second is brilliant
Body pipe end is coupled to the armature winding of the power converting system；Generate and be coupled to the of the third transistor terminal
The associated second controller voltage of two controller terminals；And generation threeth controller associated with the 3rd controller terminal
Voltage.This method also includes：Processing and the first controller voltage, the second controller voltage and the 3rd controller
The associated information of voltage, it is poor with the 3rd controller voltage sum, institute that the first controller voltage is equal to first voltage
State second controller voltage poor equal to second voltage with the 3rd controller voltage sum；The first voltage difference is set to keep permanent
It is fixed；And to change the second voltage poor, with the first transistor described on or off and influence flows through the armature winding
Primary current.For example, this method is realized according to Fig. 1, Fig. 2, Fig. 3 (a), Fig. 3 (b), Fig. 4 and/or Fig. 5.
In another embodiment, a kind of method for adjusting power converting system, the power converting system includes having
The system controller of controller terminal, this method includes：The generation controller voltage associated with the controller terminal, it is described
Controller terminal is coupled to the first transistor terminal of the first transistor, and the first transistor also includes second transistor end
Son and third transistor terminal, the third transistor terminal are coupled to the armature winding of the power converting system；Generation
The electric current associated with the controller voltage；At least based on the information associated with the electric current by the 4th of second transistor the
Transistor terminal is biased to reference voltage, and the second transistor also includes the 5th transistor terminal and the 6th transistor terminal,
6th transistor terminal is coupled to resistor；And at least based on the information associated with the reference voltage described
Supply voltage is generated at 5th transistor terminal.For example, this method is realized according at least to Fig. 4 and/or Fig. 5.
According to another embodiment, a kind of system controller for being used to adjust power converting system includes：Controller terminal, should
Controller terminal is associated with controller voltage and is coupled to the first transistor terminal of the first transistor, the first crystal
Pipe also includes second transistor terminal and third transistor terminal, and the third transistor terminal is coupled to the power conversion
The armature winding of system；First resistor device, the first resistor device is coupled to the controller terminal；And clamper component, should
Clamper component is coupled to the first resistor device.Clamper component is configured as receiving and the control from the first resistor device
The associated electric current of device voltage, at least based on the information generation reference voltage associated with the electric current, and by the reference
Voltage output is to pressure regulator.For example, the system controller is realized according at least to Fig. 4 and/or Fig. 5.
According to another embodiment, a kind of method for adjusting power converting system, the power converting system includes having
The system controller of controller terminal, this method includes：The generation controller voltage associated with the controller terminal, it is described
Controller terminal is coupled to the first transistor terminal of the first transistor, and the first transistor also includes second transistor end
Son and third transistor terminal, the third transistor terminal are coupled to the armature winding of the power converting system；Generation
The electric current associated with the controller voltage, the electric current flows through the resistor for being coupled to the controller terminal；At least base
Reference voltage is generated in the information associated with the electric current；And by the reference voltage output to pressure regulator.For example, the party
Method is realized according at least to Fig. 4 and/or Fig. 5.
For example, some or all of components in each of the invention embodiment individually and/or with least another component phase group
It is one kind or many using one or more component softwares, one or more nextport hardware component NextPorts and/or software and nextport hardware component NextPort to close ground
Combination is planted to realize.In another example, some or all of components in each of the invention embodiment individually and/or with extremely
Few another component realizes in one or more circuits combinedly, such as in one or more analog circuits and/or one or
Realized in multiple digital circuits.In another example, each embodiment of the invention and/or example can be with combined.
Although having been described for the specific embodiment of the present invention, but it will be apparent to one skilled in the art that it is also present in described
The equivalent other embodiments of embodiment.It will, therefore, be evident that the present invention is not limited by shown specific embodiment, but only by weighing
The scope that profit is required is limited.
Claims (11)
1. a kind of system controller for being used to adjust power converting system, the system controller includes：
First controller terminal, the first controller terminal is associated with the first controller voltage and is coupled to the first transistor
The first transistor terminal, the first transistor also include second transistor terminal and third transistor terminal, the described 3rd
Transistor terminal is coupled to the armature winding of power converting system；
Second transistor, the second transistor includes the 4th transistor terminal, the 5th transistor terminal and the 6th transistor terminal,
5th transistor terminal is coupled to first resistor device；And
First clamper component, is coupled to the 4th transistor terminal；
Wherein, the first clamper component is configured as receiving the electric current associated with the first controller voltage, at least base
Reference voltage is generated in the information associated with the electric current, and the 4th transistor terminal is biased to the reference electricity
Pressure is with the generation supply voltage at the 5th transistor terminal.
2. the system as claimed in claim 1 controller, wherein, the 4th transistor terminal is coupled by second resistance device
To the first controller terminal.
3. the system as claimed in claim 1 controller, in addition to：
Second controller terminal, the second controller terminal is associated with second controller voltage and is coupled to the 3rd crystalline substance
Body pipe end；And
3rd controller terminal, the 3rd controller terminal is associated with the 3rd controller voltage.
4. system controller as claimed in claim 3, in addition to it is coupled to the second clamper group of the first controller terminal
Part；
Wherein：
It is poor with the 3rd controller voltage sum that the second controller voltage is equal to second voltage；And
It is poor that the second transistor is configured as changing the second voltage, with the first transistor described on or off and influences
Flow through the primary current of the armature winding.
5. system controller as claimed in claim 4, wherein：
It is poor with the 3rd controller voltage sum that the first controller voltage is equal to first voltage；And
The second clamper component is configured as keeping the first voltage difference to be no more than predetermined threshold.
6. the system as claimed in claim 1 controller, in addition to：
Second controller terminal, the second controller terminal is associated with second controller voltage；
3rd controller terminal, the 3rd controller terminal is associated with the 3rd controller voltage and is coupled to the first capacitor
The first capacitor terminal, the capacitor also includes being coupled to the second capacitor terminal of the second controller terminal；With
And
First switch, is configured as receiving the first control signal and including first switch terminal and second switch terminal, described
First switch terminal is coupled to the 4th transistor terminal, and the second switch terminal is coupled to the second controller end
Son；
Wherein, the system controller is configured as closing described first if the 3rd controller voltage is less than threshold value and opening
Close.
7. system controller as claimed in claim 6, in addition to：
Second switch, is configured as receiving the second control signal and be configured as will be associated with the first controller voltage
Electric current is conducted to the first clamper component；
Wherein, the system controller is configured as：
If the 3rd controller voltage is more than the threshold value, the second switch is closed so that first controller is electric
The associated electric current of pressure is conducted to the first clamper component；And
If the 3rd controller voltage is less than the threshold value, the second switch is disconnected.
8. a kind of method for adjusting power converting system, the power converting system includes the system control with controller terminal
Device processed, this method includes：
The generation controller voltage associated with the controller terminal, the controller terminal is coupled to the first transistor
The first transistor terminal, the first transistor also includes second transistor terminal and third transistor terminal, and the described 3rd is brilliant
Body pipe end is coupled to the armature winding of the power converting system；
The generation electric current associated with the controller voltage；
The 4th transistor terminal of second transistor is at least biased to by reference voltage based on the information associated with the electric current,
The second transistor also includes the 5th transistor terminal and the 6th transistor terminal, and the 6th transistor terminal is coupled to
Resistor；And
Supply voltage is at least generated at the 5th transistor terminal based on the information associated with the reference voltage.
9. a kind of system controller for being used to adjust power converting system, the system controller includes：
Controller terminal, the controller terminal is associated with controller voltage and is coupled to the first transistor of the first transistor
Terminal, the first transistor also includes second transistor terminal and third transistor terminal, the third transistor terminal quilt
It is coupled to the armature winding of the power converting system；
First resistor device, the first resistor device is coupled to the controller terminal；And
Clamper component, the clamper component is coupled to the first resistor device；
Wherein, the clamper component is configured as receiving the electricity associated with the controller voltage from the first resistor device
Stream, at least based on associated with electric current information generation reference voltage, and by the reference voltage output to pressure regulator.
10. system controller as claimed in claim 9, wherein：
The pressure regulator includes second transistor, and the second transistor includes the 4th transistor terminal, the 5th transistor terminal
With the 6th transistor terminal, the 6th transistor terminal is coupled to second resistance device；
4th transistor terminal is coupled to the clamper component；And
The clamper component is configured as the 4th transistor terminal being biased to the reference voltage with brilliant the described 5th
Supply voltage is generated at body pipe end.
11. a kind of method for adjusting power converting system, the power converting system includes the system with controller terminal
Controller, this method includes：
The generation controller voltage associated with the controller terminal, the controller terminal is coupled to the first transistor
The first transistor terminal, the first transistor also includes second transistor terminal and third transistor terminal, and the described 3rd is brilliant
Body pipe end is coupled to the armature winding of the power converting system；
The generation electric current associated with the controller voltage, the electric current flows through the resistance for being coupled to the controller terminal
Device；
Reference voltage is at least generated based on the information associated with the electric current；And
By the reference voltage output to pressure regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410852932.9A CN104600993B (en) | 2012-12-21 | 2012-12-21 | Switch the system and method generated with voltage for source electrode |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410852932.9A CN104600993B (en) | 2012-12-21 | 2012-12-21 | Switch the system and method generated with voltage for source electrode |
| CN201210564309.4A CN103066852B (en) | 2012-12-21 | 2012-12-21 | For the system and method that source electrode switches and voltage generates |
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|---|---|---|---|
| CN201210564309.4A Division CN103066852B (en) | 2012-12-21 | 2012-12-21 | For the system and method that source electrode switches and voltage generates |
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| CN104600993A CN104600993A (en) | 2015-05-06 |
| CN104600993B true CN104600993B (en) | 2017-07-21 |
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| CN103066852B (en) | 2012-12-21 | 2016-02-24 | 昂宝电子（上海）有限公司 | For the system and method that source electrode switches and voltage generates |
| CN107196511B (en) | 2017-03-30 | 2019-07-05 | 昂宝电子（上海）有限公司 | Controller and method for power inverter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197539A (en) * | 2006-12-08 | 2008-06-11 | 群康科技(深圳)有限公司 | Electric power circuit |
| CN201087939Y (en) * | 2007-10-19 | 2008-07-16 | 英格尔科技股份有限公司 | Improved construction of exchanging type power converter circuit |
| CN101604672A (en) * | 2008-05-30 | 2009-12-16 | 技领半导体(上海)有限公司 | Realize the constant-current constant-voltage controller and the three-pin encapsulation thereof of pin multiplexing |
-
2012
- 2012-12-21 CN CN201410852932.9A patent/CN104600993B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197539A (en) * | 2006-12-08 | 2008-06-11 | 群康科技(深圳)有限公司 | Electric power circuit |
| CN201087939Y (en) * | 2007-10-19 | 2008-07-16 | 英格尔科技股份有限公司 | Improved construction of exchanging type power converter circuit |
| CN101604672A (en) * | 2008-05-30 | 2009-12-16 | 技领半导体(上海)有限公司 | Realize the constant-current constant-voltage controller and the three-pin encapsulation thereof of pin multiplexing |
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