CN2907072Y - Switching control circuit for power factor control converter working in non-continuous mode - Google Patents
Switching control circuit for power factor control converter working in non-continuous mode Download PDFInfo
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- CN2907072Y CN2907072Y CN 200520132518 CN200520132518U CN2907072Y CN 2907072 Y CN2907072 Y CN 2907072Y CN 200520132518 CN200520132518 CN 200520132518 CN 200520132518 U CN200520132518 U CN 200520132518U CN 2907072 Y CN2907072 Y CN 2907072Y
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Abstract
The utility model provides a switching control circuit which is used to generate a switching signal to control the power factor, a detecting terminal is used to generate a detecting signal basing on the discharge of inductor, an input terminal is used to detect all switching current signals basing on the switching current of inductor, an adjusting terminal is used to determine the switching ratio of a ramp signal and the maximum conduction time, an error amplifier is used to adjust the output of a power factor control converter by generating an error signal, a mixed circuit is used to generate a mixed signal, the switching signal conducts basing on the detecting signal, once the mixed signal is stronger than the error signal, the switching signal is cut off, the switch ratio of the mixed signal is reinforced with the increment of the input voltage, the conduction time and the input voltage of the switching signal increase in inverse proportion, therefore, the utility model can reduce the input current harmonic.
Description
Technical field
The utility model relates to power factor controlling, and relates in particular to a kind of control circuit that carries out power factor controlling with non-continuous mode.
Background technology
Mostly power factor correction technology all is to use the topology of boosting, and it is with continuous or discrete inductive current mode operating, and with fixing or variable switching frequency running.Owing to the peak current of the continuous electric inducing current pattern that operates with fixing switching frequency is lower, so use it for the higher application of power.For the lower application of power, the discontinuous inductive current pattern that operates with variable switching frequency then has some advantages, comprising: inductor dimensions is less, cost is lower, Circuits System is simpler, and has zero current switching (ZCS).
Fig. 1 has illustrated an existing power factor controlling transducer, and wherein one switches signal V
GBe connected to transistor 10, to switch an inductor 20 and to control an input current I
INThe input current I of described power factor controlling transducer
ACBe controlled, to realize lower current harmonics distortion.
Fig. 2 A and 2B have illustrated input current waveform I
ACAnd I
IN, according to input voltage V
ACAnd V
INBe used for existing power factor controlling transducer.The pulse duration of power factor controlling controller is subjected to the control of voltage error amplifier, and the zigzag waveform that itself and a control circuit are produced is made comparisons.Described pulse duration is along with power supply and loading condition change, but it should remain on a constant in half power cycle.Therefore, voltage error amplifier must have lower frequency bandwidth, and must be lower than supply frequency.The zero current switching comprises some application advantages.For example, inductive current is released to zero before next switching cycle begins, thereby produces higher switching efficiency.Because the variable quantity of inductive current equals peak inductive current, and inductive current starts from zero and turn back to zero at each switching cycle, thus the inductive current waveform be shaped as triangle, its mean value equal peak current half multiply by its time.Because it is to switch on the edge between continuous and the discontinuous current pattern just that zero current switches, so caused switching frequency variable.Use lower bandwidth pulse-width modulation (PWM) to provide natural power factor correction as input current with zero current switching.
Fig. 3 has illustrated the input current I of existing power factor controlling transducer
INWaveform is along with switching signal V
GEnable and increase.ON time T
ONWith T deadline
OFFRepresent the charging and the discharge cycle of inductor 20 respectively.
Fig. 4 A, 4B and 4C have illustrated three control stage T1-T3 of existing power factor controlling transducer.When transistor 10 conductings, inductor 20 is recharged.In case transistor 10 ends, the energy of inductor 20 just sees through rectifier 30 and discharges to capacitor 50.The output voltage V of described power factor controlling transducer
0Usually be set to higher voltage, 400V for example is so that obtain better power factor controlling effect.Therefore, inductor 20 interdischarge intervals, the capacitor parasitics 15 of transistor 10 should be charged higher output voltage V
0Shown in Fig. 4 C, inductor 20 discharges back and transistor 10 as yet not before the conducting fully, and energy stored can be released to capacitor 16 (or a capacitor parasitics) in the capacitor parasitics 15.Therefore on capacitor 16, produce voltage V
OSTherefore, at lower input voltage V
ACDuring this time, voltage V
OSThe input current I of bridge rectifier 40 has forbidden flowing through
AC
Fig. 5 A and 5B have illustrated voltage V
OSThe input current distortion that causes.Recently, people develop the multiple discontinuous current power factor controlling controller that is used for power factor controlling, the TDA4862 of the ST6561 of for example French ST microelectronics (ST-Microelectronics) and Siemens (Siemens).
Fig. 6 A has illustrated the circuit diagram of existing power factor controlling controller mentioned above.One multiplier terminal VM sees through resistor 21 and 22 and comes sensing input waveform V
INShown in Fig. 6 B, the voltage of sensing on the multiplier terminal VM is used for modulation ON time T
ONON time T through modulation
ONTo reduce voltage V
OSAnd improve input current waveform.Yet the shortcoming of said method is that the power loss of resistor 21 is higher, and the control circuit system complexity.In addition, another shortcoming of above-mentioned controller is to lack under-voltage protection, and this can cause the power factor controlling transducer crossing appearance overload under the low voltage conditions.
Summary of the invention
Target of the present utility model provides a kind of control switching circuit, is used for the power factor controlling transducer of discontinuous mode, and it need not, and input voltage detects and multiplier can reduce the current harmonics distortion.Another target of the present utility model provides a kind of method, and the peak power output of coming power-limiting factor control transformation device was to carry out under-voltage protection.In addition, also provide a kind of delay circuit that limits the maximum switching frequency of switching signal, it reduces the power loss of power factor controlling transducer in the underloading running.
Described control switching circuit comprises a sense terminals, and it is couple to inductor, produces a detection signal according to the discharge of inductor.One input terminal according to the switch current of inductor, is used for detecting one and switches current signal.One slope generator produces a ramp signal according to the turn-on action of switching signal.One regulates terminal, is couple to described slope generator, decides the transfer ratio of ramp signal, and the maximum ON time of decision switching signal.One error amplifier is couple to the output of power factor controlling transducer, is used for the stable error signal of adjusting the output of power factor controlling transducer with generation.One hybrid circuit, generation and ramp signal and the proportional mixed signal of switch current signal.Therefore, switching signal is conducting according to detection signal, in case and mixed signal be higher than error signal, described switching signal will be ended.The transfer ratio of mixed signal improves along with the increase of input voltage.Therefore, the ON time of switching signal improves along with the reduction of input voltage proportionally.Therefore, Harmonics of Input is reduced.
In addition, described control switching circuit comprises a delay circuit, produces an inhibit signal according to the ending action of switching signal.Described inhibit signal comprises a time of delay, is used for delaying the turn-on action of switching signal, and the maximum switching frequency of restriction switching signal.Increase along with the minimizing of error signal described time of delay.Error signal reduces with the reduction of load proportionally.Therefore, the power loss of power factor controlling transducer in the underloading running is minimized.
Description of drawings
Alterations is in order to providing further understanding of the present utility model, and incorporates and constitute the part of this specification into.Described graphic explanation embodiment of the present utility model, and with describing, in order to explain principle of the present utility model.In graphic:
Fig. 1 is the schematic diagram of an existing power factor controlling transducer.
Fig. 2 A and 2B explanation input current waveform are according to the input voltage of existing power factor controlling transducer.
Fig. 3 illustrates the input current waveform according to switching signal.
Three control stages of Fig. 4 A, 4B and the existing power factor controlling transducer of 4C explanation.
The wave distortion of the input current of Fig. 5 A and the existing power factor controlling transducer of 5B explanation.
Fig. 6 A is the circuit diagram of an existing power factor controlling transducer, and wherein the controller of power factor controlling transducer comprises that one is used for improving the multiplier of input current harmonics distortion.
Fig. 6 B illustrates that existing modulation ON time is controlled by multiplier.
Fig. 7 is the schematic diagram according to the power factor controlling transducer of an embodiment of the present utility model.
Fig. 8 is the schematic diagram that switches control circuit according to one of an embodiment of the present utility model.
Fig. 9 is the circuit diagram according to the delay circuit of an embodiment of the present utility model.
Figure 10 is the circuit diagram according to the slope generator of an embodiment of the present utility model.
Figure 11 is the circuit diagram according to the hybrid circuit of an embodiment of the present utility model.
Embodiment
Fig. 7 is the schematic diagram with the power factor controlling transducer of discontinuous mode running according to the utility model one embodiment.Convert AC power input to direct current output V with described power factor controlling transducer
0, wherein transistor 10 sees through inductor 25, rectifier 30 and capacitor 50, by switching input voltage V
INCome control energy.The purpose of power factor controlling is that the Current Waveform Control that AC power is imported is a sinusoidal waveform, and the phase place of described electric current is maintained and power input voltage V
ACPhase place identical.By the rectified action of bridge rectifier, input voltage V
INGround connection with respect to the power factor controlling transducer is always positive.
V
IN(t)＝Vpsin(ωt)，
Vp=√ 2 * V wherein
IN(rms) and the t=time;
Input current is expressed as follows similarly:
I
IN(t)＝Ipsin(ωt)，
Ip=√ 2 * I wherein
IN(rms);
The input power of power factor controlling transducer then is expressed as follows:
Pin＝Vp×Ip/2。
If efficient (η) is included in when considering in the equation, then power output is expressed as follows:
Po＝Vp×Ip×η/2---------------------------------------------(1)
With equation 1 input current is expressed as follows:
Ip＝(2×Po)/(Vp×η)-----------------------------------------(2)
Because the cause that zero current switches, the peak inductive current of inductor 25 (IL-p) is the twice of average inductor current, as shown in the formula described:
IL-p＝2×Ip
IL-p＝(4×Po)/(Vp×η)---------------------------------------(3)
Following formula is represented inductive current with the time variable form of inductive current:
IL(t)＝(4×Po)sin(wt)/(Vp×η)-------------------------------(4)
Inductive current is found the solution, obtain inductor L is charged to for example required ON time of peak current of I=L (di/dt).
T
ON＝IL-p×L/Vp----------------------------------------------(5)
T
ON＝(4×Po×L)/(Vp
2×η)------------------------------------(6)
T
OFF＝(IL-p×L)/(Vo-Vp)
T
OFF＝(4×Po×L)/[(η×Vp)×(Vo-Vp)]--------(7)
T＝T
ON+T
OFF--------------------------------------------------(8)
Also with regard to power output P
0Represent equation 5.
Po＝[Vp
2×η/(4×L)]×T(on)---------------------------(9)
According to equation 9, power output is subjected to ON time T
ONControl.Especially for crossing under-voltage protection, limit maximum ON time and just limited peak power output.
When putting on the power factor controlling transducer, can see through inductor 25, rectifier 30 and capacitor 50 at output V to AC power
0Last generation direct voltage.Control switching circuit 100 sees through the output that resistor 51 and 52 is couple to the power factor controlling transducer.Capacitor 96 is connected to the COM terminal of control switching circuit 100, so that provide frequency compensation for the lower band width that is lower than supply frequency.Control switching circuit 100 output switching signal V
GCome driving transistors 10.As switching signal V
GFor enabling, transistor 10 is driven and conducting.See through transistor 10 conductings, inductor 25 chargings.Resistor 90 produces switch current signal V according to inductive current
SThen, switch current signal V
SBe connected to the VS terminal of control switching circuit 100.As long as switch current signal V
SBe higher than limit voltage V
R2, switching signal V
GWill be closed, so just change action be formed periodic electric current restriction.As switching signal V
GFor stopping using, transistor 10 ends, and energy stored sees through rectifier 30 and is discharged into output V in the inductor 25
0In case the discharging current of inductor 25 drops to zero, will detect zero voltage in the ancillary coil of inductor 25.The sense terminals VD of control switching circuit 100 sees through resistor 23 and is connected to described ancillary coil, is used for detecting zero current condition.Just produce a detection signal after detecting zero current condition, so control switching circuit 100 just can begin next switching cycle.
Fig. 8 explanation is according to the schematic diagram of the control switching circuit 100 of the utility model one embodiment.Slope generator 300 produces ramp signal RMP and maximum duty cycle signal MD according to switching signal VG.One MOT terminal is couple to slope generator 300, with transfer ratio and the switching signal V of decision ramp signal RMP
GMaximum ON time.Fig. 7 explanation is connected to the resistor 95 decision switching signal V of ground connection from the MOT terminal of control switching circuit 100
GMaximum ON time.Switching signal V
GMaximum ON time and then restriction switching signal V
GMinimum switching frequency, this can be avoided switching frequency to be reduced in the sonic-frequency band.Error amplifier 120 is couple to the output of power factor controlling transducer, so that produce error signal at the output of error amplifier 120, in order to the stable output of adjusting the power factor controlling transducer.Error amplifier 120 is transduction error amplifiers (trans-conductance error amplifier).The output of error amplifier 120 and then be connected to the COM terminal of control switching circuit 100 and the input of delay circuit 200.Hybrid circuit 350 produces and ramp signal RMP and switch current signal V
SProportional mixed signal V
W Comparator 115 has a negative input end and a positive input terminal, and it is connected respectively to the output and the mixed signal V of error amplifier 120
WThe output of comparator 115 is connected to the input of OR door 135, produces one first reset signal.Comparator 116 is connected to OR door 135 another inputs, produces one second reset signal.The 3rd input of OR door 135 is connected to maximum duty cycle signal MD.Limit voltage V
R2With switch current signal V
SBe connected to the input of comparator 116, in order to reach periodic electric current restriction.The output of OR door 135 is in order to reset flip-flop 140.Flip-flop 140 is used for producing switching signal V
GComparator 110 is couple to sense terminals VD and limit voltage V
R1Therefore, in case the voltage of sense terminals VD is lower than limit voltage V
R1, just can produce detection signal.Described detection signal sees through AND door 130 and enables flip-flop 140.Therefore, switching signal V
GIn case the conducting according to detection signal is and mixed signal V
WBe higher than error signal, switching signal V
GJust be cut off.In addition, delay circuit 200 is according to switching signal V
GBy and produce inhibit signal INH.See through inverter 131, inhibit signal INH is connected to another input of AND door 130.Inhibit signal INH comprises a time of delay, is used for delaying switching signal V
GTurn-on action, and restriction switching signal V
GMaximum switching frequency.
Fig. 9 has showed the circuit diagram according to the delay circuit 200 of the utility model one embodiment, wherein charging current I
GWith the time of delay of capacitor 260 decision delay circuits 200.Operational amplifier 210 is connected to the COM terminal to receive error signal.Another operational amplifier 215 is by limit voltage V
R3Supply.Operational amplifier 210,215, resistor 205 and transistor 220,230,231 produce electric current I 231.Electric current I 231 and current source 250 decision charging current I
C Current source 250 provides minimum charging current.Electric current I 231 produces pro rata with error signal, and therefore increases along with the minimizing of error signal time of delay.Error signal reduces along with the minimizing of load proportionally.Under the underloading situation, limit voltage V
R3The scope of decision error signal.As switching signal V
GDuring conducting, transistor 270 is with capacitor 260 discharges.Capacitor 260 is according to switching signal V
GBy and be recharged.Inverter 280 is connected to capacitor 260, to produce inhibit signal INH.
Switch and the power factor controlling conversion according to the zero current that carries out with discontinuous mode of the present utility model, next switching cycle begins at the boundary of zero inductance current status.The energy equation is:
ε＝L×I
2/2---------------------------------------(10)
The wattmeter that the power factor controlling transducer is supplied is shown:
Po＝[Vp
2×η×T
ON 2/(4×L×T)]------------------------(11)
Wherein showed T=T in the equation 6 and 7
ON+ T
OFF
When loading on of power factor controlling transducer reduced under the underloading situation, time of delay, Td can relatively increase, and time of delay, Td was inserted in before next switching cycle begins.Therefore, the switching cycle T of switching signal is extended for:
T＝T
OS+T
OFF+Td---------------------------------------(12)
So under underloading and no-load situation, the switching frequency of switching signal is minimized.Therefore the power loss of power factor controlling transducer is reduced.
Figure 10 has showed slope generator 300, and wherein operational amplifier 310 comprises reference voltage V
R4Operational amplifier 310, transistor 315,316,317 are in conjunction with the resistor among Fig. 7 95, to produce electric current I 317.Electric current I 317 is used for being capacitor 319 chargings.Produce ramp signal RMP at capacitor 319 places.The transfer ratio of electric current I 317 decision ramp signal RMP.NAND door 320 is connected to transistor 318, according to switching signal V
GStop using and be capacitor 319 discharges.In addition, in case the voltage of capacitor 319 is higher than limit voltage V
R5, capacitor 319 will be discharged, and has so just limited switching signal V
GMaximum ON time.The output of comparator 325 flip-flop 330 that is used for resetting.Inverter 331 is connected to the output of comparator 325, to produce maximum duty cycle signal MD.Flip-flop 330 is by switching signal V
GBe provided with.The output of flip-flop 330 is connected to second input of NAND door 320.Therefore, electric current I 317, capacitor 319 and limit voltage V
R5The maximum pulse of decision ramp signal RMP, and and then decision switching signal V
GMaximum ON time.
Figure 11 is the circuit diagram according to the hybrid circuit 350 of the utility model one embodiment.Operational amplifier 361, resistor 391 and transistor 373,374,375 form a voltage is changeed current converter.Ramp signal RMP is connected to described voltage changes current converter, so that convert ramp signal RMP to electric current I 375.Switch current signal VS is connected to buffer amplifier 362.Electric current I 375 sees through resistor 392 and is connected to buffer amplifier 362.Therefore, on resistor 392, produce mixed signal V
W, institute reaches mixed signal V
WWith ramp signal RMP and switch current signal V
SProportional.Switch current signal V
STransfer ratio along with the input voltage V of power factor controlling transducer
INIncrease and improve.Relatively, the transfer ratio of mixed signal is along with input voltage V
INIncrease and improve.Therefore, switching signal V
GON time increase, and with input voltage V
INInversely proportional.By modulation switching signal V
GON time, Harmonics of Input thereby minimizing.
The those skilled in the art is easy to understand, and can carry out various modifications and changes to structure of the present utility model under the situation that does not break away from category of the present utility model or spirit.In view of mentioned above, we wish that the utility model can contain for modifications and changes of the present utility model, as long as these modifications and changes belong to the category of aforesaid right requirement and equivalent thereof.
Claims (6)
1, a kind of control switching circuit that is used for a power factor controlling transducer wherein produces one and switches signal, is used for switching an inductor, is used for power factor controlling, it is characterized in that it comprises:
One sense terminals, it is couple to described inductor, produces a detection signal according to the discharge of described inductor;
One input terminal according to the switch current of described inductor, is used for detecting one and switches current signal, and the transfer ratio of wherein said switch current signal improves according to the increase of the input voltage of described power factor controlling transducer;
One slope generator produces a ramp signal according to described switching signal;
One regulates terminal, and it is couple to described slope generator, uses and decides the transfer ratio of described ramp signal, and determine the maximum ON time of described switching signal;
One error amplifier, the output that it is couple to described power factor controlling transducer is used for producing an error signal with the stable output of adjusting described power factor controlling transducer;
One hybrid circuit, it produces a mixed signal, and described mixed signal and described ramp signal and described switch current signal are proportional;
The conducting of wherein said switching signal according to described detection signal; And in case find that described mixed signal is higher than described error signal, described switching signal is just ended.
2, control switching circuit according to claim 1, it is characterized in that it further comprises a delay circuit, produce an inhibit signal according to the ending action of described switching signal, wherein said inhibit signal comprises a time of delay, be used for delaying the turn-on action of described switching signal, and being used for limiting the maximum switching frequency of described switching signal, increase along with the minimizing of described error signal wherein said time of delay, and described error signal reduces with the reduction of load proportionally.
3, a kind of power factor controlling transducer with a switching control circuit, be used for producing a switch current signal that is used to switch an inductor, be used for power factor controlling, the transfer ratio of wherein said switch current signal improves along with the increase of the input voltage of described power factor controlling transducer, it is characterized in that wherein said control switching circuit comprises:
One sense terminals, it is couple to described inductor, produces a detection signal according to the discharge of described inductor;
One slope generator produces a ramp signal according to described switching signal;
One regulates terminal, and it is couple to described slope generator, uses and decides the transfer ratio of described ramp signal, and determine the maximum ON time of described switching signal;
One error amplifier, the output that it is couple to described power factor controlling transducer is used for producing an error signal with the stable output of adjusting described power factor controlling transducer;
The conducting of wherein said switching signal according to described detection signal; And described switching signal is ended according to the comparison of described ramp signal and described error signal.
4, control switching circuit according to claim 3 is characterized in that it further comprises a delay circuit, produces an inhibit signal according to the ending action of described switching signal; Wherein said inhibit signal comprises a time of delay, delaying the turn-on action of described switching signal, and limits the maximum switching frequency of described switching signal, and increase along with the reduction of load wherein said time of delay.
5, a kind of control switching circuit that is used for a power factor controlling transducer wherein produces one and switches signal, is used for switching an inductor, is used for power factor controlling, it is characterized in that it comprises:
One sense terminals, it is couple to described inductor, produces a detection signal according to the discharge of described inductor;
One input terminal according to the switch current of described inductor, is used for detecting one and switches current signal, and the transfer ratio of wherein said switch current signal improves according to the increase of the input voltage of described power factor controlling transducer;
One slope generator produces a ramp signal according to described switching signal;
One error amplifier, the output that it is couple to described power factor controlling transducer is used for producing an error signal with the stable output of adjusting described power factor controlling transducer;
One hybrid circuit, its generation one and described ramp signal and the proportional mixed signal of described switch current signal;
The conducting of wherein said switching signal according to described detection signal; And described switching signal is ended according to the comparison of described mixed signal and described error signal.
6, control switching circuit according to claim 5, it is characterized in that it further comprises a delay circuit, produce an inhibit signal according to the ending action of described switching signal, wherein said inhibit signal comprises a time of delay, be used for delaying the turn-on action of described switching signal, and being used for limiting the maximum switching frequency of described switching signal, increase along with the reduction of described load wherein said time of delay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520132518 CN2907072Y (en) | 2005-11-09 | 2005-11-09 | Switching control circuit for power factor control converter working in non-continuous mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520132518 CN2907072Y (en) | 2005-11-09 | 2005-11-09 | Switching control circuit for power factor control converter working in non-continuous mode |
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| CN2907072Y true CN2907072Y (en) | 2007-05-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100421336C (en) * | 2005-11-09 | 2008-09-24 | 崇贸科技股份有限公司 | A switch-over control circuit for non-continuous mode PF control transducer |
| CN102005914A (en) * | 2009-09-03 | 2011-04-06 | 联阳半导体股份有限公司 | Power factor conversion control device |
| CN101854116B (en) * | 2009-04-02 | 2012-10-03 | 辉芒微电子（深圳）有限公司 | Power factor correcting device and controller and THD (Total Harmonic Distortion) attenuator used therein |
| CN105281591A (en) * | 2015-11-26 | 2016-01-27 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and control method of power converter |
| CN113841327A (en) * | 2018-10-29 | 2021-12-24 | 德州仪器公司 | Switched mode power supply controller |
-
2005
- 2005-11-09 CN CN 200520132518 patent/CN2907072Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100421336C (en) * | 2005-11-09 | 2008-09-24 | 崇贸科技股份有限公司 | A switch-over control circuit for non-continuous mode PF control transducer |
| CN101854116B (en) * | 2009-04-02 | 2012-10-03 | 辉芒微电子（深圳）有限公司 | Power factor correcting device and controller and THD (Total Harmonic Distortion) attenuator used therein |
| CN102005914A (en) * | 2009-09-03 | 2011-04-06 | 联阳半导体股份有限公司 | Power factor conversion control device |
| CN102005914B (en) * | 2009-09-03 | 2013-12-04 | 联阳半导体股份有限公司 | Power factor conversion control device |
| CN105281591A (en) * | 2015-11-26 | 2016-01-27 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and control method of power converter |
| US9837898B2 (en) | 2015-11-26 | 2017-12-05 | Silergy Semiconductor Technology (Hangzhou) Ltd. | Peak-value current mode control for power converters |
| CN105281591B (en) * | 2015-11-26 | 2019-07-26 | 矽力杰半导体技术(杭州)有限公司 | The control circuit and control method of power inverter |
| CN113841327A (en) * | 2018-10-29 | 2021-12-24 | 德州仪器公司 | Switched mode power supply controller |
| CN113841327B (en) * | 2018-10-29 | 2024-01-05 | 德州仪器公司 | Switching mode power supply controller |
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