CN105897015A - PSR constant-current constant-voltage AC/DC chip - Google Patents
PSR constant-current constant-voltage AC/DC chip Download PDFInfo
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- CN105897015A CN105897015A CN201610422421.2A CN201610422421A CN105897015A CN 105897015 A CN105897015 A CN 105897015A CN 201610422421 A CN201610422421 A CN 201610422421A CN 105897015 A CN105897015 A CN 105897015A
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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
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a PSR constant-current constant-voltage AC/DC chip. The chip comprises a control chip and a PSR flyback type transformer, wherein the control chip comprises a software driving module, a constant-current loop module, a constant-voltage loop module and a soft driving module; the PSR flyback type transformer is connected with the constant-current loop module through a feedback circuit module; the PSR flyback type transformer is connected with the constant-voltage loop module through a sampling circuit module; and the output ends of the constant-current loop module and the constant-voltage loop module are connected with the soft driving module separately. Compared with the prior art, the high-precision constant-current constant-voltage chip design is provided, so that the precision of the output voltage and the output current is greatly improved; and meanwhile, the system has relatively high overall efficiency and stability, so that the chip obtains a relatively high working performance under the coordination and matching of the modules in the chip.
Description
Technical field
The present invention relates to constant current constant voltage control chip field, be specifically related to a kind of PSR constant current constant voltage
AC/DC chip.
Background technology
In society, daily life and work start increasing use and arrives
Electronic equipment.And the function of power management chip is equivalent to " heart " of electronic equipment, it is
Electronic equipment plays the conversion to electric energy, distribution, the management function of safety detection and efficient operation.
Being developed so far, Switching Power Supply has been widely used in various electronic communication equipments, the most gradually becomes
For a kind of key core skill indispensable during hyundai electronics information industry high speed development
Art.Along with the development of semiconductor fabrication process technology and updating of integrated circuit technology level,
Switch power technology is dry towards high integration, high efficiency, high reliability, low noise and anti-electromagnetism
The tradition developing direction such as disturbing and constantly continue development, traditional big electric current rapid charge scheme possesses not
Evitable shortcoming: compatible poor, charger cost is high, and volume is big.Quick charge scheme
Propose the design of power management chip is proposed new challenge, Switching Power Supply is sent out simultaneously
Exhibition has great importance.
Summary of the invention
It is an object of the invention to provide a kind of PSR constant current constant voltage AC/DC chip, it can be effective
Solution the problems referred to above, accurately control constant current and the constant voltage precision of output, ensure that system simultaneously
Simplification and efficiently.
For achieving the above object, present invention employs techniques below scheme:
A kind of PSR constant current constant voltage AC/DC chip, it is characterised in that: include control chip and
PSR flyback transformer, control chip includes software-driven modules, constant current loop module, perseverance
Pressure loop module, soft-sphere model module, PSR flyback transformer is by feedback circuit module and perseverance
Stream loop module is connected, and SR flyback transformer is by sample circuit module and constant voltage loop
Module is connected, the outfan of constant current loop module and constant voltage loop module respectively with floppy drive dynamic model
Block is connected.Novel sampling control module and soft-sphere model module, and mistake is also included in chip
Press the module such as under-voltage, overheat protector and agitator.
Concrete scheme is: PSR flyback transformer includes by winding NAUX, primary side winding
The ancillary coil winding of NP, secondary limit winding NS composition and diode D0, D1；Diode D1
Negative pole divide one end and resistance R3 one end that two-way connects electric capacity C0 respectively, diode D1's
The drain electrode of positive pole and primary side winding NP one end equal access power transistor M0, electric capacity C0, electricity
The other end of resistance R3 and primary side winding NP is all connected with absorbing circuit, power transistor
The grid of M0 connects the G pin of control chip, and the source electrode of power transistor M0 divides two-way respectively
Connecting CS pin and one end of resistance RS of control chip, winding NAUX one end connects resistance
One end of R1, the other end of resistance R1 is connected with one end of resistance R2, resistance R1, R2
Between the FB pin of contact Access Control chip, resistance RS, resistance R2, winding NAUX
The other end all access outer signal；One end of secondary limit winding NS connects the positive pole of diode D0,
Diode D0 negative pole divides two-way to connect one end of electric capacity C1, one end of resistance R0 respectively, electricity
Hold C1, the other end all other ends with secondary limit winding NS of resistance R0 are connected.Wherein:
CS pin feeds back to the shutoff of Current-Limiting Comparator decision power tube for gathering external circuit information,
FB pin for feeding back the expression output voltage change after electric resistance partial pressure to control chip
Information, G pin is for controlling the power tube M0 of outside.
Sample circuit module includes transistor Vbias, operational amplifier CA, and VDD connects crystal
The source electrode of pipe Vbias, the drain electrode of transistor Vbias connects the source electrode of transistor M9, computing
The in-phase end of amplifier CA connects the drain electrode of transistor M9, M1, M2, operational amplifier respectively
The end of oppisite phase of CA connects the drain electrode of transistor M5, M6, M7, M8 and electric capacity C2's respectively
One end, the outfan of operational amplifier CA connects sample information outfan SH, transistor M1
Source electrode divide three tunnels to connect the drain electrode of transistor M3, one end of electric capacity C0, transistor respectively
The source electrode of M8, the source electrode of transistor M2 divides three tunnels to connect the source electrode of transistor M7, crystalline substance respectively
The drain electrode of body pipe M4 and one end of electric capacity C1, the source electrode of transistor M3, M4, M5, M6
And one end of electric capacity C0, C1, C2 is all connected with junction point A.
Soft-sphere model circuit module includes level switch module, trigger, the two of level switch module
Individual drive output connects R, S pin of trigger input respectively, trigger outfan
Q pin connects the grid of transistor M1, M3, M5 respectively, the QN pin of trigger outfan
Connecting grid and the positive pole of phase inverter CD of transistor M6, M9 respectively, VDD connects crystal
The source electrode of pipe M1 and the drain electrode of transistor M4, the drain electrode of transistor M1 connects transistor M2's
Source electrode, drain electrode point three tunnels of transistor M2 connect drain electrode and the crystalline substance of transistor M3, M5 respectively
The grid of body pipe M4, the source ground of transistor M3, M5, the source electrode of transistor M4 is respectively
Connecting drain electrode and one end of resistance R1 of transistor M7, M8, the negative pole of phase inverter CD divides
Lian Jie the grid of transistor M7, M8 and the drain electrode of transistor M6, the source of transistor M6
Pole connect VDD, resistance R1 the other end connect resistance R2 one end, transistor M3, M5, M7,
The source electrode of M8 and the equal ground connection of the other end of resistance R2, transistor M9, M10, M11, M12
Source electrode connect the grid leak short circuit of VDD, transistor M12, transistor M12 drain electrode point two-way is respectively
Connect the drain electrode of transistor M19, M13, the grid leak short circuit of transistor M11, transistor M11
Drain electrode be connected with the drain electrode of transistor M18, the grid of transistor M11 and transistor M10's
Grid is connected, and drain electrode point four tunnels of transistor M10 connect the leakage of transistor M15, M16 respectively
Pole and the grid of transistor M14, M15, the drain electrode of transistor M9 divides two-way to connect crystalline substance respectively
The drain electrode of body pipe M17 and the positive pole of phase inverter CE, the negative pole of phase inverter CE connects transistor
The grid of M13, the source electrode of M13 connects the drain electrode of transistor M14, and the negative pole of current source DC is even
Meeting VDD, the positive pole of current source DC divides the drain electrode and crystalline substance that four tunnels connect transistor M20 respectively
The grid of body pipe M18, M19, M20, the grid of transistor M17 connects feedback voltage V FB,
The grid of transistor M16 connect voltage UP, transistor M20, M19, M18, M17, M16,
The source grounding of M15, M14.
Level shifting circuit module includes transistor M1, M2, M3, M4 and phase inverter CB, letter
Number Driver-logic is respectively connected to positive pole and the grid of transistor M2 of phase inverter CB, instead
The negative pole of phase device CB connects the grid of transistor M3, and VCC connects the source of transistor M1, M4
Pole, the source ground of transistor M2, M3, transistor M1 grid, transistor M3, M4
Drain electrode be all connected with DOWN end, transistor M4 grid, transistor M1, M2 drain electrode equal
Being connected with UP end, UP end, DOWN end are that the driving signal of this level shifting circuit module is defeated
Going out end, signal Driver-logic is drive control signal.
This chip is by the detection demagnetization time thus regulates system operating frequency and realizes one newly
The current constant control mode of type, sample circuit module then chooses auxiliary winding demagnetization time interval
As the sampled point of feedback voltage at 2/3, and then by error amplifier and design threshold base
Accurate error is amplified, and soft-sphere model design includes level switch module, soft-sphere model module and totem pole
The grid electrode drive module of structure, is used for reducing switch motion EMI interference and improving efficiency.
The present invention is compared with prior art, it is proposed that a kind of high-precision constant current constant voltage chip designs,
The precision making output voltage and output electric current is greatly enhanced.Simultaneity factor has higher whole
Engine efficiency, with stable, makes this chip possess higher work under the cooperation of chip inner module
Performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of flyback transformer；
Fig. 3 is the circuit structure schematic diagram of sample circuit module；
Fig. 4 is the structure principle chart of level shifting circuit module；
Fig. 5 is the structure principle chart of soft-sphere model circuit module.
Detailed description of the invention
In order to make objects and advantages of the present invention clearer, below in conjunction with embodiment to this
Invention is specifically described.Should be appreciated that following word is only in order to describe the one of the present invention
Or several specific embodiment, the protection domain of not concrete to present invention request is carried out strictly
Limit.
The module not being discussed in detail in the present invention, those of ordinary skill in the art can be according to existing
The means that technology chips is used are implemented.
Technical scheme that the present invention takes is as it is shown in figure 1, a kind of high accuracy PSR constant current constant voltage
AC/DC chip, including PSR flyback transformer, constant current loop module, constant voltage loop module,
The modules such as control circuit module, sampling hold circuit module and soft-sphere model.PSR feedback control system
Unite by adding ancillary coil winding, utilize feedback voltage and the output voltage of ancillary coil winding
Relation output voltage is carried out feedback sample, coordinate the constant current/constant voltage in chip to control loop,
Making output have higher precision, the soft start-up process at a slow speed of soft-sphere model ensure that EMI simultaneously,
Rapidly switch off design and ensure that work efficiency.
Fig. 2 is flyback transformer, and Controller is the control core that the present invention is to be designed
Sheet, control chip has tri-pins of G, FB, CS, CS pin gather external circuit information thus
Feed back to Current-Limiting Comparator and determine the shutoff of power tube, what FB pin fed back to chip is through
The information representing output voltage change after electric resistance partial pressure, finally from the merit outside the control of G pin
Rate pipe M0, electric capacity C0 and resistance R3 are in parallel, and a termination absorbing circuit, another terminates crystal
The drain electrode of pipe M0, primary side winding NP mono-terminates absorbing circuit, another termination transistor M0's
Drain electrode, the grid of power transistor M0 connects the G pin of control chip, and source electrode connects control chip
CS interface, the source electrode of resistance RS mono-termination transistor M0, another terminates outer signal,
The positive pole of secondary limit winding NS mono-terminating diode D0, another termination capacitor C0, D0 negative pole connects
Electric capacity C0 one end, resistance R0 is in parallel with electric capacity C0, winding NAUX mono-terminating resistor RS's
One end, the other end connecting resistance of the other end connecting resistance R2, R2 of other end connecting resistance R1, R1
RS, R1 are connected with the FB end of control chip with the intermediate point of resistance R2.
Fig. 3 is the structure chart of sample circuit, and SH is sample information outfan, and VDD connects transistor
The source electrode of Vbias, the drain electrode of Vbias connects the source electrode of transistor M9, the drain electrode of transistor M9
The in-phase end of concatenation operation amplifier CA, the drain electrode of transistor M1 connects the leakage of transistor M9
Pole, its source electrode connects drain electrode and one end of electric capacity C0, the source of transistor M3 of transistor M3
Pole connect electric capacity C0 the other end, transistor M2 drain electrode connect transistor M9 drain electrode and
The in-phase end of CA, its source electrode connects source electrode and the drain electrode of transistor M4 of transistor M7, brilliant
The source electrode of body pipe M4 connects electric capacity C1 and one end of electric capacity C0, and the other end of electric capacity C1 connects
The drain electrode of transistor M4, the source electrode of transistor M8 connects the source electrode of M1, and its drain electrode connects fortune
Calculating the end of oppisite phase of amplifier CA, CA end of oppisite phase is also connected with drain electrode and the transistor of transistor M7
The drain electrode of M5, M6, the source electrode of transistor M5 and M6 connects the source electrode of transistor M3 and M4,
The two ends of electric capacity C2 connect source electrode and the drain electrode of transistor M5 and M6 respectively.
Fig. 4 is the structure chart of level shifting circuit module, and UP end and DOWN end are this module
Driving signal output part, Driver-logic is drive control signal, and VCC connects transistor
The source electrode of M1 and M4, transistor M1 grid connects drain electrode and the output down, M1 of transistor M3
The grid of the drain electrode drain electrode and output up, transistor M4 that connect transistor M2 connect M2
Drain electrode, its source electrode connects the drain electrode of transistor M3, and the grid of transistor M2 meets phase inverter CB
Positive pole and input signal end, the negative pole of phase inverter CB connects the grid of transistor M3, transistor
The source ground of M2 and M3.
Fig. 5 is the structure chart of soft-sphere model circuit, and Driver module is the level conversion in Fig. 4
Module, two drive output connects rest-set flip-flop R and S pin, the source of transistor M1
It is feedback voltage that the drain electrode of pole and transistor M4 meets VDD, VFB, and the grid of transistor M1 connects
The Q end of rest-set flip-flop, drain electrode connects the source electrode of transistor M2, and the drain electrode of M2 meets transistor M3
With the drain electrode of M5, the grid of transistor M3 and M5 connects trigger Q end, its source ground
Transistor M4 grid connects the drain electrode of M2, and its source electrode connects the drain electrode of transistor M7 and M8, crystal
One end of the drain electrode connecting resistance R1 of pipe M7, the other end of resistance R1 connects with resistance R2 one end,
The source electrode of transistor M7, M8 and one end ground connection of resistance R2, the grid of transistor M7, M8
Connecing the negative pole of phase inverter CD, phase inverter positive pole connects the QN end of rest-set flip-flop, transistor M6's
Source electrode meets VDD, and grid meets QN, and drain electrode connects the negative pole of phase inverter CD, and phase inverter CD positive pole is even
Connecing the grid of transistor M9, the source electrode of transistor M9, M10, M11, M12 meets VDD, brilliant
The grid leak short circuit of body pipe M12, its drain electrode connects the drain electrode of transistor M19, transistor M19's
Grid connects grid and the positive pole of current source DC, the drain electrode of transistor M20 of transistor M20
Connect the positive pole of current source DC, transistor M20, M19, M18, M17, M16, M15, M14
Source ground, the grid leak short circuit of transistor M11, the drain electrode with transistor M18 is connected, brilliant
The grid of body pipe M18 connects the positive pole of current source DC, and the grid of transistor M10 connects transistor
The grid of M11, its drain electrode connects the drain electrode of transistor M16, and the drain electrode of transistor M9 connects
The positive pole of phase inverter CE and the drain electrode of transistor M17, the negative pole of phase inverter CE connects transistor
The grid of M13, the drain electrode of M13 connects the drain electrode of transistor M12, and its source electrode connects transistor M14
Drain electrode, the grid of transistor M14, M15 connects the drain electrode of transistor M10, transistor M15
Drain electrode connect transistor M10 and M16 drain electrode.
In a word, the present invention can effectively reduce cost and simplify system design, improves simultaneously
The defect that PSR technology is intrinsic, it is achieved that higher constant current accuracy and output voltage precision,
Termination is closed cooperating of modules and is achieved a high efficiency constant current constant voltage control chip.
The above is only the preferred embodiment of the present invention, it is noted that for the art
Those of ordinary skill for, after knowing content described in the present invention, without departing from the present invention
On the premise of principle, it is also possible to it is made some equal conversion and replacement, and these convert on an equal basis
Also should be regarded as belonging to protection scope of the present invention with substituting.
Claims (6)
1. a PSR constant current constant voltage AC/DC chip, it is characterised in that: include control chip and
PSR flyback transformer, control chip includes software-driven modules, constant current loop module, constant voltage
Loop module, soft-sphere model module, PSR flyback transformer is by feedback circuit module and constant current ring
Road module is connected, and SR flyback transformer is connected with constant voltage loop module by sample circuit module
Connecing, constant current loop module is connected with soft-sphere model module respectively with the outfan of constant voltage loop module.
PSR constant current constant voltage AC/DC chip the most according to claim 1, it is characterised in that:
PSR flyback transformer includes being made up of winding NAUX, primary side winding NP, secondary limit winding NS
Ancillary coil winding and diode D0, D1；The negative pole of diode D1 divides two-way to connect electricity respectively
Holding one end and resistance R3 one end of C0, positive pole and primary side winding NP one end of diode D1 all connect
Enter the drain electrode of power transistor M0, electric capacity C0, resistance R3 and the other end of primary side winding NP
All being connected with absorbing circuit, the grid of power transistor M0 connects the G pin of control chip,
The source electrode of power transistor M0 divides CS pin that two-way connects control chip respectively and resistance RS's
One end, winding NAUX one end connects one end of resistance R1, the other end of resistance R1 and resistance R2
One end be connected, the FB pin of the contact Access Control chip between resistance R1, R2, resistance
RS, resistance R2, the other end of winding NAUX all access outer signal；One end of secondary limit winding NS
Connect the positive pole of diode D0, diode D0 negative pole divide one end that two-way connects electric capacity C1 respectively,
One end of resistance R0, electric capacity C1, resistance R0 the other end all with the other end of time limit winding NS
It is connected.Wherein: CS pin is used for gathering external circuit information and feeds back to Current-Limiting Comparator decision power
The shutoff of pipe, FB pin is for feeding back the expression output voltage after electric resistance partial pressure to control chip
The information of change, G pin is for controlling the power tube M0 of outside.
PSR constant current constant voltage AC/DC chip the most according to claim 1, it is characterised in that:
Sample circuit module includes transistor Vbias, operational amplifier CA, and VDD connects transistor Vbias
Source electrode, transistor Vbias drain electrode connect transistor M9 source electrode, operational amplifier CA's
In-phase end connects the drain electrode of transistor M9, M1, M2 respectively, and the end of oppisite phase of operational amplifier CA divides
Lian Jie the drain electrode of transistor M5, M6, M7, M8 and one end of electric capacity C2, operational amplifier
The outfan of CA connects sample information outfan SH, and the source electrode of transistor M1 divides three tunnels to connect respectively
The drain electrode of transistor M3, one end of electric capacity C0, the source electrode of transistor M8, the source of transistor M2
Ji Fen tri-tunnel connects the source electrode of transistor M7, the drain electrode of transistor M4 and electric capacity C1's respectively
One end, the source electrode of transistor M3, M4, M5, M6 and one end of electric capacity C0, C1, C2 all with
Junction point A is connected.
PSR constant current constant voltage AC/DC chip the most according to claim 1, it is characterised in that:
Soft-sphere model circuit module includes level switch module, trigger, two drivings of level switch module
Outfan connects R, S pin of trigger input respectively, and the Q pin of trigger outfan divides
Not Lian Jie the grid of transistor M1, M3, M5, the QN pin of trigger outfan connects crystalline substance respectively
The grid of body pipe M6, M9 and the positive pole of phase inverter CD, VDD connect transistor M1 source electrode and
The drain electrode of transistor M4, the drain electrode of transistor M1 connects the source electrode of transistor M2, transistor M2
Drain electrode point three tunnels connect drain electrode and the grid of transistor M4 of transistor M3, M5 respectively, brilliant
The source ground of body pipe M3, M5, the source electrode of transistor M4 connects transistor M7, M8 respectively
Drain electrode and one end of resistance R1, the negative pole of phase inverter CD connects transistor M7, M8 respectively
Grid and the drain electrode of transistor M6, the source electrode of transistor M6 connects VDD, the other end of resistance R1
Connect the another of one end of resistance R2, the source electrode of transistor M3, M5, M7, M8 and resistance R2
The equal ground connection in one end, the source electrode of transistor M9, M10, M11, M12 meets VDD, transistor M12's
Grid leak short circuit, transistor M12 drain electrode point two-way connects the drain electrode of transistor M19, M13 respectively,
The grid leak short circuit of transistor M11, the drain electrode of transistor M11 is connected with the drain electrode of transistor M18,
The grid of transistor M11 is connected with the grid of transistor M10, and the drain electrode of transistor M10 divides four tunnels
Connect drain electrode and the grid of transistor M14, M15, the transistor of transistor M15, M16 respectively
The drain electrode point two-way of M9 connects drain electrode and the positive pole of phase inverter CE of transistor M17 respectively, anti-phase
The negative pole of device CE connects the grid of transistor M13, and the source electrode of M13 connects the drain electrode of transistor M14,
The negative pole of current source DC connects VDD, and the positive pole of current source DC divides four tunnels to connect transistor M20 respectively
Drain electrode and the grid of transistor M18, M19, M20, the grid of transistor M17 connects feedback
The grid of voltage VFB, transistor M16 connect voltage UP, transistor M20, M19, M18, M17,
The source grounding of M16, M15, M14.
PSR constant current constant voltage AC/DC chip the most according to claim 1, it is characterised in that:
Level shifting circuit module includes transistor M1, M2, M3, M4 and phase inverter CB, signal
Driver-logic is respectively connected to positive pole and the grid of transistor M2, the phase inverter of phase inverter CB
The negative pole of CB connects the grid of transistor M3, and VCC connects the source electrode of transistor M1, M4, crystal
The source ground of pipe M2, M3, transistor M1 grid, transistor M3, M4 drain electrode all and DOWN
End is connected, and transistor M4 grid, the drain electrode of transistor M1, M2 are all connected with UP end, UP
End, DOWN end are the driving signal output part of this level shifting circuit module, signal
Driver-logic is drive control signal.
PSR constant current constant voltage AC/DC chip the most according to claim 1, it is characterised in that:
Also include over-and under-voltage module, overheat protector module and oscillator module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610422421.2A CN105897015A (en) | 2016-06-13 | 2016-06-13 | PSR constant-current constant-voltage AC/DC chip |
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| CN201610422421.2A CN105897015A (en) | 2016-06-13 | 2016-06-13 | PSR constant-current constant-voltage AC/DC chip |
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| CN201610422421.2A Pending CN105897015A (en) | 2016-06-13 | 2016-06-13 | PSR constant-current constant-voltage AC/DC chip |
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| CN112542954A (en) * | 2020-12-16 | 2021-03-23 | 南京微盟电子有限公司 | Adaptive soft drive control circuit suitable for DCM |
| CN112564511A (en) * | 2020-12-16 | 2021-03-26 | 南京微盟电子有限公司 | Self-adaptive soft drive control circuit suitable for CCM |
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| CN112542954A (en) * | 2020-12-16 | 2021-03-23 | 南京微盟电子有限公司 | Adaptive soft drive control circuit suitable for DCM |
| CN112564511A (en) * | 2020-12-16 | 2021-03-26 | 南京微盟电子有限公司 | Self-adaptive soft drive control circuit suitable for CCM |
| CN112737339A (en) * | 2020-12-16 | 2021-04-30 | 南京微盟电子有限公司 | Self-adaptive soft drive control circuit |
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