CN110247555B - Isolated power supply adapter device without high-voltage electrolytic capacitor and optical coupler - Google Patents
Isolated power supply adapter device without high-voltage electrolytic capacitor and optical coupler Download PDFInfo
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- CN110247555B CN110247555B CN201910616588.6A CN201910616588A CN110247555B CN 110247555 B CN110247555 B CN 110247555B CN 201910616588 A CN201910616588 A CN 201910616588A CN 110247555 B CN110247555 B CN 110247555B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 45
- 230000003287 optical effect Effects 0.000 title claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims abstract description 7
- 238000002955 isolation Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000005684 electric field Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 4
- 229920005591 polysilicon Polymers 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 230000005674 electromagnetic induction Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M3/33569—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 having several active switching elements
- H02M3/33576—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to an isolated power supply adapter without a high-voltage electrolytic capacitor and an optical coupler, which comprises a double-base island structure formed by a primary controller and a secondary controller, wherein a field coupler ET is connected between the primary controller and the secondary controller so as to realize the isolation transmission of electric signals between the primary controller and the secondary controller; the transformer T, the first NMOS tube M1 and the second NMOS tube M2 are also included; the LC energy storage ring comprises an inductance L, a nonpolar capacitor C and a polar capacitor C L The method comprises the steps of carrying out a first treatment on the surface of the One end of the inductor L is connected with the output positive electrode of the diode rectifier bridge, and the other end of the inductor L is connected with one end of the nonpolar capacitor C. Compared with the prior art, the LC second-order energy storage ring is adopted to replace a high-voltage electrolytic capacitor, so that electromagnetic interference is greatly reduced, and the power factor is close to 1; the signal transmission between the primary controller and the primary controller adopts the field coupler to replace the optical coupler, so that the signal can be transmitted bidirectionally, the control precision is obviously improved, and the requirements of industry and scientific research can be met.
Description
Technical Field
The invention relates to the field of electronic power, in particular to an isolated power supply adapter without a high-voltage electrolytic capacitor and an optical coupler.
Background
The high-voltage electrolytic capacitor and the optical coupler in the existing switching power supply are indispensable devices, and the high-voltage electrolytic capacitor is used for filtering the cosine wave voltage after full-wave rectification into a smooth direct-current voltage. The disadvantage of this method is that the conduction angle of the current is small, which causes strong electromagnetic interference. Another disadvantage is that the current phase lags the voltage phase, the power factor is very low, typically less than 0.5, resulting in an increase of reactive power in the grid, increasing the burden on the power plant. The third disadvantage is that the service life of the high-voltage capacitor is only about 3000 hours at high temperature, and the service life of other devices is higher than 10000 hours, which shortens the service life of the switching power supply by two thirds.
The optical coupler is an optical-electric converter, and has the main functions of primary and secondary isolation besides error signal transmission, so that the secondary high-voltage commercial power is prevented, and the personal safety is ensured. Its advantages are poor temp characteristics, high drift current (3 times greater than 0 deg.C) at 50 deg.C, and low precision of controller. Another disadvantage is that the signal can only be transmitted unidirectionally, and the application is limited.
Disclosure of Invention
The invention provides an isolated power supply adapter without a high-voltage electrolytic capacitor and an optical coupler, which has the characteristic of higher control precision.
The invention provides an isolated power supply adapter without a high-voltage electrolytic capacitor and an optical coupler, which comprises a double-base island structure consisting of a primary controller and a secondary controller, and further comprises a diode rectifier bridge, wherein two input ends of the diode rectifier bridge are used for connecting an AC power supply;
a field coupler ET is connected between the primary controller and the secondary controller to realize the isolation transmission of electric signals between the primary controller and the secondary controller;
the transformer T, the first NMOS tube M1 and the second NMOS tube M2 are also included; the LC energy storage ring comprises an inductance L, a nonpolar capacitor C and a polar capacitor C L The method comprises the steps of carrying out a first treatment on the surface of the One end of the inductor L is connected with the output positive electrode of the diode rectifier bridge, and the other end of the inductor L is connected with one end of the nonpolar capacitor C; the other end of the nonpolar capacitor C is connected with the homonymous end of the primary coil of the transformer T; the negative electrode of the diode rectifier bridge is connected with the synonym end of the primary coil of the transformer T; the secondary coil of the transformer T is used for supplying power to a load;
the grid electrode of the first NMOS tube M1 is connected with the primary controller, and the source electrode thereof passes through a resistor R CS The drain electrode is connected with the other end of the inductor L; the grid electrode of the second NMOS tube M2 is connected with the secondary controller, the source electrode of the second NMOS tube M is connected with the homonymous end of the secondary coil of the transformer T, and the drain electrode of the second NMOS tube M is connected with a load; the polar capacitance C L The positive pole is connected with the synonym end of the secondary coil of the transformer T, and the negative pole is connected with the drain electrode of the second NMOS tube M2.
In the scheme of the invention, an LC second-order energy storage ring is adopted to replace a high-voltage electrolytic capacitor, and the electromagnetic interference is greatly reduced because the conduction angle of the inductor is far larger than that of the capacitor and no charging pulse current exists. In addition, the voltage phase of the inductor is advanced to the current, the voltage phase of the capacitor is delayed to the current, and the voltage phase and the current phase of the LC second-order serial loop after the two are counteracted are the same, so that the power factor is close to 1. The defects of high electromagnetic interference and low power factor of the high-voltage electrolytic capacitor in the prior art are overcome. The signal transmission between the primary controller and the primary controller adopts the field coupler to replace the optical coupler, so that the signal can be transmitted bidirectionally, the control precision is obviously improved, and the requirements of industry and scientific research can be met.
The nonpolar capacitor C adopts a thin film capacitor.
The primary controller, the secondary controller, the first NMOS tube M1 and the field coupler ET form a control chip.
The control chip adopts a multi-base island packaging structure.
The primary controller and the secondary controller of the control chip are respectively packaged on two substrates of the same chip, electric signals of the primary controller and the secondary controller are transmitted through a field coupler ET, and the field coupler ET and the two controllers are packaged in the same chip.
The field coupler ET adopts a magnetic field coupler or an electric field coupler.
The magnetic field coupler consists of two conductor coils and transmits a modulated signal by electromagnetic induction.
The conductor of the magnetic field coupler is made of polysilicon material or metal material.
The medium of the magnetic field coupler is made of silicon oxide material or silicon nitride.
Compared with the prior art, the technical scheme of the invention improves the power factor, the service life of the power supply and the control precision, and reduces the electromagnetic interference.
Drawings
FIG. 1 is a schematic diagram of an isolated power adapter according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a secondary controller according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a primary controller according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of one embodiment of an electric field coupler;
FIG. 5 is a schematic diagram of one embodiment of a magnetic field coupler;
FIG. 6 is a schematic diagram of a control chip according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
The invention aims at the defects of the traditional switching power supply converter adopting a high-voltage electrolytic capacitor and an optical coupler, improves the topological structure, and is specifically described by specific embodiments.
As shown in fig. 1, the isolated power supply adapting device without the high-voltage electrolytic capacitor and the optical coupler provided by the invention comprises a double-base island structure consisting of a primary controller and a secondary controller, and further comprises a diode rectifier bridge, wherein two input ends of the diode rectifier bridge are used for connecting an AC power supply;
a field coupler ET is connected between the primary controller and the secondary controller to realize the isolation transmission of electric signals between the primary controller and the secondary controller;
the transformer T, the first NMOS tube M1 and the second NMOS tube M2 are also included; the LC energy storage ring comprises an inductance L, a nonpolar capacitor C and a polar capacitor C L The method comprises the steps of carrying out a first treatment on the surface of the One end of the inductor L is connected with the output positive electrode of the diode rectifier bridge, and the other end of the inductor L is connected with one end of the nonpolar capacitor C; the other end of the nonpolar capacitor C is connected with the homonymous end of the primary coil of the transformer T; the negative electrode of the diode rectifier bridge is connected with the synonym end of the primary coil of the transformer T; the secondary coil of the transformer T is used for supplying power to a load;
the grid electrode of the first NMOS tube M1 is connected with the primary controllerSource electrode passing resistor R CS The drain electrode is connected with the other end of the inductor L; the grid electrode of the second NMOS tube M2 is connected with the secondary controller, the source electrode of the second NMOS tube M is connected with the homonymous end of the secondary coil of the transformer T, and the drain electrode of the second NMOS tube M is connected with a load; the polar capacitance C L The positive pole is connected with the synonym end of the secondary coil of the transformer T, and the negative pole is connected with the drain electrode of the second NMOS tube M2.
In the scheme of the invention, an LC second-order energy storage ring is adopted to replace a high-voltage electrolytic capacitor, and the electromagnetic interference is greatly reduced because the conduction angle of the inductor is far larger than that of the capacitor and no charging pulse current exists. In addition, the voltage phase of the inductor is advanced to the current, the voltage phase of the capacitor is delayed to the current, and the voltage phase and the current phase of the LC second-order serial loop after the two are counteracted are the same, so that the power factor is close to 1. The defects of high electromagnetic interference and low power factor of the high-voltage electrolytic capacitor in the prior art are overcome.
In the scheme of the invention, the voltage stabilization, the constant current and the single-stage PFC circuit are integrated into a whole; the control loop replaces analog circuitry with digital circuitry, which is executable code designed in a hardware description language, which may be implemented in an ASIC, FPGA or DSP.
In the scheme of the invention, the optical coupler is replaced by a field coupler in signal transmission between the primary controller and the primary controller, the primary controller and the secondary controller are connected with electric signals by a bidirectional field coupler, and the field medium is used for isolation. As shown in fig. 1, the field coupler bidirectionally transmits signals, and error signals obtained by sampling output voltage and current by the secondary controller are transmitted from A2 to A1 to control the PWM controller of the primary controller; the switching signal of the sampled first NMOS transistor M1 is transmitted from A1 to A2, and the second NMOS transistor M2 connected with the secondary control is controlled.
The insulation resistance of the field coupler is larger than 10MΩ, the breakdown voltage is higher than 2KV, the temperature coefficient is almost equal to zero, signals can be transmitted in two directions, the control precision is obviously improved, and the requirements of industry and scientific research can be met.
As one embodiment of the present invention, the nonpolar capacitor C is a thin film capacitor. As shown in figure 1, the nonpolar capacitor C in the loop is only a thin film capacitor with small capacity, the service life is more than 10 times of that of high-voltage electrolysis, and the defect of low service life caused by adopting high-voltage electrolysis in the prior art is overcome.
As one embodiment of the present invention, as shown in fig. 1, the primary controller, the secondary controller, the first NMOS transistor M1 and the field coupler form a control chip, and the control chip includes a double-base island structure formed by the primary controller and the secondary controller.
As shown in fig. 2, the secondary controller includes a voltage comparator, a current comparator, a first ADC converter, a second ADC converter, and a first modem; the non-inverting input end of the voltage comparator is connected with the reference voltage, the inverting input end of the voltage comparator is connected with the feedback voltage output to the load by the transformer T, and the output end of the voltage comparator is connected with the first modem through the first ADC; the positive-phase input end of the current comparator is connected with the reference current, the negative-phase input end of the current comparator is connected with the feedback current output to the load by the transformer T, and the output end of the current comparator is connected with the first modem through the second ADC. The error voltage (current) obtained by the sampling circuit is compared with the reference voltage (current) to obtain an error signal, the error signal is quantized into a digital signal by an ADC, then modulated onto a high-frequency carrier wave, and transmitted to A1 through A2 to control the PWM controller of the primary controller.
The PWM pulse signal of the primary controller is transmitted to A2 through A1, and the secondary controller detects the pulse edge signal to switch the second NMOS tube M2 to finish synchronous rectification.
As shown in fig. 3, the primary controller is composed of a second modem, a first DAC converter, a second DAC converter, and a PWM controller. The high-frequency modulated wave received by A1 is passed through a second modem to obtain a digital error signal, and then converted into an analog error signal by two DAC converters, and the PWM controller is a multimode second-order control loop, and can output high-frequency pulse signals with different widths according to the size of the error signal, so that the first NMOS tube M1 is controlled to obtain high-frequency pulse current. PWM switching current is in resistor R CS The pressure drop across is used for over-current protection.
The same name end of the high-frequency transformer is changed, the converter can work in a flyback mode or a forward mode, a control circuit of the chip can support a double mode, and the converter can be automatically converted in DCM, CCM and BCM states according to the load size.
As an embodiment of the present invention, the control chip adopts a multi-island package structure.
The primary controller and the secondary controller of the control chip are respectively packaged on two substrates of the same chip, electric signals of the primary controller and the secondary controller are transmitted through a field coupler, and the field coupler ET and the two controllers are packaged in the same chip.
As an embodiment of the present invention, the field coupler is a transmitting/receiving antenna in a micro space, and can operate in an electric field coupler or a magnetic field coupler mode according to different shapes of the antenna.
As shown in fig. 4, the electric field coupler is in the shape of one embodiment, and is composed of two closely spaced conductors, the material may be polysilicon or metal, and the medium may be silicon oxide or silicon nitride. Which transmits a high frequency modulated signal away from the electric field of the plate capacitor.
As shown in fig. 5, one embodiment of the magnetic field coupler is in the shape of a coil of two closely spaced electrical conductors, which transmit a modulated signal by electromagnetic induction.
As an embodiment of the present invention, as shown in fig. 6, the field coupler is a magnetic field coupler, and is packaged together with the primary controller and the secondary controller in one chip. The primary controller and the secondary controller are respectively packaged on two substrates of the same chip, electric signals between the chips are transmitted through a field coupler, and the field coupler and the two controllers are packaged in the same chip. The present invention is not limited to the number of chips and the number of field couplers in one package.
As an embodiment of the present invention, the field coupler is an electric field coupler, and is packaged together with the primary controller and the secondary controller in one chip.
As an embodiment of the present invention, the conductor of the magnetic field coupler is made of a polysilicon material or a metal material.
As an embodiment of the present invention, the medium of the magnetic field coupler is silicon oxide material or silicon nitride.
The scheme of the invention is suitable for the industrial-grade switching power supply with 5W-60W output power, and the control chip can be designed into flyback state and forward state, and can also replace the traditional household adapter, mobile electric appliance and LED illumination power supply.
Based on the embodiment shown in fig. 1, the power factor is improved from 0.4 to more than 0.98 by adopting the isolated power supply adapting device provided by the scheme of the invention, the service life of the power supply is prolonged by 2 times, the electromagnetic interference is reduced to about 50%, and the control precision is improved by 3 times.
The technical scheme of the invention is developed based on microelectronic technology, electric power technology, electromagnetic field technology and radio frequency communication technology, and is closest to the power factor correction technology, flyback control technology and forward control technology in the high-frequency conversion integrated circuit of the AC-DC switching power supply.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (9)
1. The isolated power supply adapting device without the high-voltage electrolytic capacitor and the optical coupler comprises a double-base island structure formed by a primary controller and a secondary controller, and further comprises a diode rectifier bridge, wherein two input ends of the diode rectifier bridge are used for connecting an AC power supply; the method is characterized in that a field coupler ET is connected between the primary controller and the secondary controller so as to realize isolation transmission of electric signals between the primary controller and the secondary controller; the transformer T, the first NMOS tube M1 and the second NMOS tube M2 are also included; the LC energy storage ring comprises an inductance L, a nonpolar capacitor C and a polar capacitor C L The method comprises the steps of carrying out a first treatment on the surface of the One end of the inductor L is connected with the output positive electrode of the diode rectifier bridge, and the other end of the inductor L is connected with one end of the nonpolar capacitor C; the other end of the nonpolar capacitor C is connected with the homonymous end of the primary coil of the transformer T; the cathode of the diode rectifier bridge and the primary coil of the transformer TIs connected with the heteronym end of the file; the secondary coil of the transformer T is used for supplying power to a load; the grid electrode of the first NMOS tube M1 is connected with the primary controller, and the source electrode thereof passes through a resistor R CS The drain electrode is connected with the other end of the inductor L; the grid electrode of the second NMOS tube M2 is connected with the secondary controller, the source electrode of the second NMOS tube M is connected with the homonymous end of the secondary coil of the transformer T, and the drain electrode of the second NMOS tube M is connected with a load; the polar capacitance C L The positive pole is connected with the synonym end of the secondary coil of the transformer T, and the negative pole is connected with the drain electrode of the second NMOS tube M2.
2. The isolated power adapter of claim 1 wherein the nonpolar capacitor C is a thin film capacitor.
3. The isolated power adapter device according to claim 1, wherein the primary controller, the secondary controller, the first NMOS transistor M1 and the field coupler ET constitute a control chip.
4. The isolated power adapter of claim 3 wherein the control chip is a multi-island package.
5. The isolated power adapter of claim 3 wherein the primary and secondary controllers of the control chip are packaged on two substrates of the same chip, respectively, and the electrical signals of the primary and secondary controllers are transmitted through a field coupler ET, which is packaged in the same chip as the two controllers.
6. An isolated power adaptation device according to claim 3, wherein the field coupler ET employs a magnetic field coupler or an electric field coupler.
7. The isolated power adapter of claim 6 wherein the magnetic field coupler is comprised of two conductive coils for transmitting the modulated signal using electromagnetic induction.
8. The isolated power adapter of claim 7 wherein the electrical conductor of the magnetic field coupler is a polysilicon material or a metallic material.
9. The isolated power adapter of claim 6 wherein the magnetic field coupler medium is a silicon oxide material or silicon nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616588.6A CN110247555B (en) | 2019-07-09 | 2019-07-09 | Isolated power supply adapter device without high-voltage electrolytic capacitor and optical coupler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616588.6A CN110247555B (en) | 2019-07-09 | 2019-07-09 | Isolated power supply adapter device without high-voltage electrolytic capacitor and optical coupler |
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| Publication Number | Publication Date |
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| CN110247555A CN110247555A (en) | 2019-09-17 |
| CN110247555B true CN110247555B (en) | 2024-02-13 |
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| CN103944360A (en) * | 2012-11-14 | 2014-07-23 | 电力集成公司 | Switch mode power converters using magnetically coupled galvanically isolated lead frame communication |
| CN109286307A (en) * | 2017-07-20 | 2019-01-29 | 南京理工大学 | A forward and flyback power factor correction device |
| CN209913710U (en) * | 2019-07-09 | 2020-01-07 | 上海来远电子科技有限公司 | Isolated power supply adapter device without high-voltage electrolytic capacitor and optical coupler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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