CN111669059A - Method for realizing ultra-wide input voltage range based on UCC28070 and peripheral circuit - Google Patents
Method for realizing ultra-wide input voltage range based on UCC28070 and peripheral circuit Download PDFInfo
- Publication number
- CN111669059A CN111669059A CN202010657903.2A CN202010657903A CN111669059A CN 111669059 A CN111669059 A CN 111669059A CN 202010657903 A CN202010657903 A CN 202010657903A CN 111669059 A CN111669059 A CN 111669059A
- Authority
- CN
- China
- Prior art keywords
- ucc28070
- input voltage
- sampling
- power supply
- output voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a method for realizing an ultra-wide input voltage range based on a UCC28070 and a peripheral circuit, and solves the technical problem that the UCC28070 adopts a Boost topological structure, a staggered PFC power supply based on the DC-DC application of the ultra-wide input voltage range of the UCC28070 is designed, and the ultra-wide input voltage range of a switching power supply in a DC-DC mode is realized. In order to achieve the above effects and advantages, the present innovation adopts a technical means of artificially changing the determination method of UCC28070 during startup starting from the sampling logic of the input voltage and the output voltage of the peripheral circuit of UCC 28070.
Description
Technical Field
The invention relates to a method and a peripheral circuit for realizing an ultra-wide input voltage range based on UCC 28070.
Background
In prior art UCC28070 circuits, a resistor R is connected between groundIMOTo set the gain of the multiplier; a resistor R is connected between the pin 7 and the groundSYNDetermining the size of the reduction rate in current synthesis; pins 8 and 9 are input of two-phase detection current, and the internal part of the pin is connected with the non-inverting input end of the current amplifier; the pin 10 is a current limiting setting; pins 11 and 12 are the outputs of the two-phase current amplifier; a pin 13 is a 6V reference power supply; a gate drive with a pin of A phase is provided at 14; a pin 15 is a working power supply, and a pin 16 is a reference ground; pin 17 is a control signal of the B-phase power switch; the 18 feet are soft starting; 19 to RRTSetting the working frequency of an internal oscillator; a resistor R is connected between the pin 20 and the groundDMXAccording to RDMXAnd RRTThe ratio between them determines the maximum duty cycle of the PWM wave output.
The operating principle of the UCC28070 in the existing application circuit is as follows: the UCC28070 is an interleaved parallel Boost power factor correction circuit specially designed by TI corporation, and comprises a bridge rectifier, an output filter capacitor COUTUCC28070 controller, boost inductor L1、L2Diode D1、D2Power switch tube VT1、VT2And a current sensing transformer T1、T2And the like.
The specific working principle is as follows: the AC power supply is converted into DC voltage V after passing through the bridge rectifierinThe value of the DC voltage VinProviding a sampled value V of the input voltage of the UCC28070 controllerVINAC(ii) a Before the UCC28070 controller is not started, the output voltage value V of the circuitOUTFor an input voltage value VinThrough a diode drop, the output voltage value V at the momentOUTAn output voltage sample value Vvsense of the UCC28070 controller is provided; when the output voltage sampling value Vvsense is greater than 0.75V, UCC28070 starts to start up to provide drive for mos tubes in the Boost voltage booster circuit, so that the circuit works normally.
The driving waveforms of a pin 14 and a pin 17 of the UCC28070 chip act on two Boost PFC converter units with the same parameters, the phase difference of PWM driving signals of two power switching tubes in the circuit is 180 degrees, the two Boost PFC converter units work in an interlaced state, and the input current is the sum of the mutual superposition of two inductive currents. Because the two inductors of the converter are in the staggered working state, the ripple currents of the two inductors are also in the staggered state, and the ripples of the two inductors are cancelled when the two inductors are superposed, so that the input current ripple caused by the boost inductor and the power switch is reduced.
However, due to the inherent startup mode of UCC28070, its input voltage range is relatively narrow in DC-DC applications for the following reasons:
1) UCC28070 typically interleaves the voltage divider networks in parallel Boost PFC circuits that require VINAC and VSENSE to be in the same proportion;
2) the UCC28070 is typically required in a staggered parallel Boost PFC circuit, 5 pins of the chip are used for sampling input voltage, and a resistor is directly adopted for VinDividing the input voltage into 8 parts according to the sampling of the input voltage, namely, considering that the input effective value in a range is fixed, as shown in FIG. 3;
3) the UCC28070 is typically required in a staggered parallel Boost PFC circuit, 4 pins of the chip are used for sampling output voltage, and a resistor is directly adopted for VOUTAnd performing voltage division, wherein the value obtained by voltage division determines whether the chip is started.
In combination with the above three points, it can be seen that in a typical application circuit, the input voltage range of the switching power supply is relatively narrow.
Disclosure of Invention
The technical problem to be solved by the invention is that UCC28070 is used for designing an interleaved PFC power supply based on the ultra-wide input voltage range DC-DC application of UCC28070 by adopting a Boost topological structure, so that the ultra-wide input voltage range of the switching power supply in a DC-DC mode is realized.
In order to achieve the above effects and advantages, the technical means adopted by the innovation is to artificially change the judgment method of the UCC28070 during startup starting from the sampling logic of the input voltage and the output voltage of the UCC28070 peripheral circuit;
the original method for judging the sampling circuit when the UCC28070 is started up is to judge whether the chip is normally started up according to the size of the sampling value of the output voltage of the UCC28070, and judge the effective value grade of the input voltage of the switching power supply according to the size of the sampling value of the input voltage of the UCC28070, and meanwhile, the proportion of the divider resistance of the sampling circuit of the input voltage and the output voltage is the same;
the peripheral circuitry of UCC28070 is modified using the sample value characteristics of UCC28070 described above, as shown in fig. 1. Resistors R1 and R3, R1 and R4 are respectively connected in series and then connected in parallel to an input voltage end VINAC _28070 of the UCC28070 chip; a capacitor C1 is connected between R3 and R4, R2 and R4 are respectively grounded, and R1, R3 and a capacitor C1 are respectively connected with + 15V; the other ends of the R1 and the R2 are respectively connected with a diode Dvsense which is conducted in the forward direction, and the other end of the diode Dvsense is respectively connected with a capacitor C2, a resistor R5, a resistor R6 and an output voltage end VSENSE of the UCC28070 in parallel; capacitor C2, resistors R5, R6 are respectively grounded, and the manufacturer of the UCC28070 chip is texas instruments-TI. The other end of the diode vsense is also connected with a resistor RA1 in parallel, and the resistor RA1 is connected with Vout. Vout 800V, RA1 1600k Ω, R5, R6 12k Ω, R3 20k Ω, R4 5.1k Ω, R1 22.1k Ω, and R2 4.02k Ω.
Firstly, an input voltage sampling circuit is shielded, so that the input voltage of the input voltage sampling circuit does not participate in closed-loop control when the UCC28070 is started, an external power supply method is adopted, a voltage dividing resistor is used for dividing voltage, and an obtained input voltage sampling value VINAC directly influences the effective value grade of the input voltage of a switching power supply (generally, when a high-power switching power supply is manufactured, the input voltage sampling value VINAC is larger than 2.6V, so that Kvff 3.857 of the UCC28070 is fixed, and the effective value of the input voltage is not limited at this moment);
then, an output voltage sampling circuit is modified, an external power supply sampling circuit is added to the original output voltage sampling circuit (two external power supply voltages can be designed by adopting the same voltage value), the sampling circuit is only effective when the UCC28070 is started, and before the input voltage value of the switching power supply is started, the sampling value VSENSE of the output voltage of the UCC28070 is higher than 0.75V, so that the ultra-wide input voltage range of the switching power supply in the DC-DC mode is realized; meanwhile, in order to ensure that the sampling circuit does not affect the feedback of the UCC28070, a sinking current is applied to the pin through the voltage dividing resistor, the influence of the sinking current on the feedback is eliminated by the diode, and after the switching power supply module is normally started, the UCC28070 works in an inherent control mode.
The ultra-wide input voltage range of the switching power supply in the DC-DC mode can be realized by the peripheral circuit of UCC28070 pin designed as shown in fig. 1.
Drawings
FIG. 1 is a peripheral circuit based on UCC28070 pins;
FIG. 2 is a circuit diagram of an exemplary interleaved parallel Boost PFC circuit of UCC 28070;
FIG. 3 is a table of relationships between input voltage sampling values and input voltage valid values;
fig. 4 shows the ultra wide input voltage range of the switching power supply in DC-DC mode implemented after the peripheral circuitry of UCC28070 pin is connected to UCC 28070.
Detailed Description
The foregoing and additional embodiments and advantages of the present invention are described more fully hereinafter with reference to the accompanying drawings. It is to be understood that the described embodiments are merely some, and not all, embodiments of the invention.
As is known, an auxiliary power supply (the auxiliary power supply can provide voltage before the UCC28070 chip works) is commonly used in a switching power supply, the auxiliary power supply is a customized power supply for providing required energy for each functional circuit inside an electronic product or other external functional circuits, and currently, auxiliary power supply topologies frequently used include a flyback auxiliary power supply topology, a forward auxiliary power supply topology, and the like;
in the DC-DC power supply of this design, a flyback auxiliary power supply is used to provide voltage for UCC28070, and the output voltage of the auxiliary power supply is set to 15V, as shown in fig. three;
the above is only one way to generate this supply voltage, and other external or internal supplies may be applied, without being limited thereto;
in order to enable a DC-DC switching power supply to work in an ultra-wide input range when UCC28070 is applied, the method starts from the sampling logic of input voltage and output voltage of a peripheral circuit of UCC28070, samples are taken from a specific sampling loop when the UCC28070 is started, and the original inherent judgment method when the UCC28070 is started is changed; the original inherent judgment method of the sampling circuit is to judge whether the chip is normally started according to the size of the output voltage sampling value of the UCC28070, judge the effective value grade of the input voltage of the switching power supply according to the size of the input voltage sampling value of the UCC28070, and simultaneously, the voltage division networks of the sampling circuits of the input voltage and the output voltage are the same;
the additional sampling circuitry provided by the output voltage of the auxiliary power supply to UCC28070 is shown in the upper left-hand circuit of FIG. 4 (for convenience, we will call the particular sampling loop S for the sake of convenience below)O)；
The following changes, input voltage sampling loop and output voltage sampling loop, do not need to have same proportion voltage dividing network.
Firstly, we change the original inherent input voltage sampling loop to make the input voltage sampling always be SOIn-circuit sampling, e.g. setting value VVINAC3V, and greater than 2.6V, to fix Kvff of UCC28070 to 3.857, the effective value of the input voltage is not limited.
In the DC-DC switching power supply, assuming that the rated output voltage is 600V, the proportion of the voltage dividing resistances of the input voltage sampling circuit and the output voltage sampling circuit is the same according to requirements, when the input voltage is less than 200V, if the original inherent sampling loop is adopted, the sampling value V is the sameVENSEWill be less than 0.75V, UCC28070 will not start; therefore, we will modify the original inherent output voltage sampling loop when the auxiliary power supply is workingWhen UCC28070 is ready to start, UCC28070 samples the output voltage at SOIn circuits, e.g. sampling values VVENSESet to 1.5V and greater than 0.75V (UCC28070 when its output voltage samples VVENSEWhen the voltage is more than 0.75V, the device is acquiescently started); at the same time to ensure SOThe circuit does not affect the feedback of UCC28070, a sinking current is applied to the pin through a voltage-dividing resistor, and a diode is used for removing SOThe effect of the circuit on the feedback; after UCC28070 is started, the original inherent output voltage sampling value VVENSEWill be greater than SOThe output voltage sampling value provided by the circuit is used for sampling and judging the original inherent output voltage;
in summary, the ultra-wide input voltage range of the switching power supply in DC-DC mode can be achieved by peripheral circuitry of UCC28070 pin, as designed in fig. 1.
The above embodiments further describe the object, technical means, and advantageous effects of the present invention in detail. It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.
Claims (5)
1. A method for realizing an ultra-wide input voltage range based on UCC28070 is characterized by comprising the following steps: modifying peripheral circuits of the UCC28070, and connecting resistors R1 and R3, and R1 and R4 in series respectively and then connecting the resistors in parallel to an input voltage end Vvinac of a UCC28070 chip; a capacitor C1 is connected between R3 and R4, R2 and R4 are respectively grounded, and R1, R3 and a capacitor C1 are respectively connected with + 15V; the other ends of the R1 and the R2 are respectively connected with a diode Dvsense which is conducted in the forward direction, and the other end of the diode Dvsense is respectively connected with a capacitor C2, a resistor R5, a resistor R6 and an output voltage end VSENSE of the UCC28070 in parallel; the capacitor C2, the resistors R5 and R6 are respectively grounded, the other end of the diode vsense is also connected with a resistor RA1 in parallel, the resistor RA1 is connected with Vout, and the numerical values of all the elements (including Vout and the power supply voltage) are obtained;
firstly, shielding an input voltage sampling circuit to ensure that the input voltage does not participate in closed-loop control when the UCC28070 is started, adopting an external power supply method, dividing the voltage by using a voltage dividing resistor to obtain an input voltage sampling value VINAC which directly influences the effective value grade of the input voltage of the switching power supply;
then, an output voltage sampling circuit is modified, an external power supply sampling circuit is added on the original output voltage sampling circuit, two external power supply voltages can be designed by adopting the same voltage value, the sampling circuit is effective only when the UCC28070 is started, and before the input voltage value of the switching power supply is started, the sampling value VSENSE of the output voltage of the UCC28070 is higher than 0.75V, so that the ultra-wide input voltage range of the switching power supply in a DC-DC mode is realized; meanwhile, in order to ensure that the sampling circuit does not affect the feedback of the UCC28070, a sinking current is applied to the pin through the voltage dividing resistor, the influence of the sinking current on the feedback is eliminated by the diode, and after the switching power supply module is normally started, the UCC28070 works in an inherent control mode.
2. The method of claim 1, wherein: further comprising:
in order to enable a DC-DC switching power supply to work in an ultra-wide input range when UCC28070 is applied, the method starts from the sampling logic of input voltage and output voltage of a peripheral circuit of UCC28070, samples are taken from a specific sampling loop when the UCC28070 is started, and the original inherent judgment method when the UCC28070 is started is changed; the original inherent judgment method of the sampling circuit is to judge whether the chip is normally started according to the size of the output voltage sampling value of the UCC28070, judge the effective value grade of the input voltage of the switching power supply according to the size of the input voltage sampling value of the UCC28070, and simultaneously, the voltage division networks of the sampling circuits of the input voltage and the output voltage are the same;
the additional sampling circuit provided by UCC28070 is the auxiliary power supply output voltage, and we name the specific sampling loop as SO(ii) a The input voltage sampling circuit and the output voltage sampling circuit do not need to be in accordance with the same voltage division network with the same proportion, and only need to be in accordance with the divisionThe pressure proportion is the same;
firstly, we change the original inherent input voltage sampling loop to make the input voltage sampling always be SOIn-circuit sampling, e.g. setting value VVINAC3V, which is larger than 2.6V, so that Kvff of UCC28070 is fixed to 3.857, and the effective value of the input voltage is not limited;
in the DC-DC switching power supply, assuming that the rated output voltage is 600V, the proportion of the voltage dividing resistances of the input voltage sampling circuit and the output voltage sampling circuit is the same according to requirements, when the input voltage is less than 200V, if the original inherent sampling loop is adopted, the sampling value V is the sameVENSEWill be less than 0.75V, UCC28070 will not start; therefore, we modify the original inherent output voltage sampling loop to sample the output voltage of UCC28070 at S when the auxiliary power supply is active and UCC28070 is ready for power-on startupOIn circuits, e.g. sampling values VVENSESet to 1.5V, greater than 0.75V, UCC28070 samples V when its output voltage is sampledVENSEWhen the voltage is more than 0.75V, the machine is acquiescently started; at the same time to ensure SOThe circuit does not affect the feedback of UCC28070, a sinking current is applied to the pin through a voltage-dividing resistor, and a diode is used for removing SOThe effect of the circuit on the feedback; after UCC28070 is started, the original inherent output voltage sampling value VVENSEWill be greater than SOThe output voltage sampling value provided by the circuit is used for judging the original inherent output voltage sampling.
3. An implementation circuit for a method according to claim 1 or 2, characterized in that:
resistors R1 and R3, R1 and R4 are respectively connected in series and then connected in parallel to an input voltage end VINAC _28070 of the UCC28070 chip;
a capacitor C1 is connected between R3 and R4, R2 and R4 are respectively grounded, and R1, R3 and a capacitor C1 are respectively connected with + 15V;
the other ends of the R1 and the R2 are respectively connected with a diode Dvsense which is conducted in the forward direction, and the other end of the diode Dvsense is respectively connected with a capacitor C2, a resistor R5, a resistor R6 and an output voltage end VSENSE of the UCC28070 in parallel;
capacitor C2, resistors R5, R6 are respectively grounded, and the manufacturer of the UCC28070 chip is texas instruments-TI.
4. The peripheral circuit of claim 3, wherein: the other end of the diode Dvsense is also connected with a resistor RA1 in parallel, and the resistor RA1 is connected with Vout.
5. The peripheral circuit of claim 4, wherein: vout 800V, RA1 1600k Ω, R5, R6 12k Ω, R3 20k Ω, R4 5.1k Ω, R1 22.1k Ω, and R2 4.02k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010657903.2A CN111669059A (en) | 2020-07-09 | 2020-07-09 | Method for realizing ultra-wide input voltage range based on UCC28070 and peripheral circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010657903.2A CN111669059A (en) | 2020-07-09 | 2020-07-09 | Method for realizing ultra-wide input voltage range based on UCC28070 and peripheral circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111669059A true CN111669059A (en) | 2020-09-15 |
Family
ID=72391875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010657903.2A Pending CN111669059A (en) | 2020-07-09 | 2020-07-09 | Method for realizing ultra-wide input voltage range based on UCC28070 and peripheral circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111669059A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821782A (en) * | 2021-03-10 | 2021-05-18 | 深圳前海云充科技有限公司 | Wide voltage AC input power module |
-
2020
- 2020-07-09 CN CN202010657903.2A patent/CN111669059A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821782A (en) * | 2021-03-10 | 2021-05-18 | 深圳前海云充科技有限公司 | Wide voltage AC input power module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8446135B2 (en) | Control circuit and method for a ripple regulator system | |
| CN110212771B (en) | Control module and method for controlling a switching converter | |
| US7193871B2 (en) | DC-DC converter circuit | |
| CN102195479B (en) | Controller for, and method of controlling, a switched mode power converter | |
| CN205901595U (en) | DC DC step -down converter | |
| US20100141222A1 (en) | Load transient sensing circuit for a power converter | |
| US20180145596A1 (en) | Method for conrolling on time of power switch in power converter | |
| Cervera et al. | Resonant switched-capacitor voltage regulator with ideal transient response | |
| US10840808B2 (en) | Plug-and-play electronic capacitor for voltage regulator modules applications | |
| US11147132B2 (en) | Switching converter, control circuit and control method thereof | |
| US11646670B2 (en) | Power conversion module | |
| JP2002010632A (en) | Ac/dc converter and dc-dc converter | |
| US11779826B2 (en) | Multi-phase switched-mode power supplies | |
| CN114204817A (en) | Asymmetric half-bridge flyback converter and peak current suppression method thereof | |
| CN112953199A (en) | Switching power supply controller and control method thereof | |
| CN210724566U (en) | Switch converter and control circuit thereof | |
| WO2019015624A1 (en) | Three-level voltage bus apparatus and method | |
| CN111669059A (en) | Method for realizing ultra-wide input voltage range based on UCC28070 and peripheral circuit | |
| CN112653324A (en) | Boost converter system without direct power supply | |
| CN212323997U (en) | Peripheral circuit for realizing ultra-wide input voltage range based on UCC28070 | |
| KR20130084199A (en) | Single power stage power factor correction circuit | |
| Kirshenboim et al. | Plug-and-play electronic capacitor for VRM applications | |
| US11552573B1 (en) | Cycle-by-cycle reverse current limiting in ACF converters | |
| US20230387777A1 (en) | System and method for estimating a current in an inductor of a power converter | |
| CN113517813B (en) | Fixed frequency dual-mode synchronous buck controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |