CN101753023A - Buck-boost converting circuit and booster circuit - Google Patents
Buck-boost converting circuit and booster circuit Download PDFInfo
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- CN101753023A CN101753023A CN200810217929A CN200810217929A CN101753023A CN 101753023 A CN101753023 A CN 101753023A CN 200810217929 A CN200810217929 A CN 200810217929A CN 200810217929 A CN200810217929 A CN 200810217929A CN 101753023 A CN101753023 A CN 101753023A
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Abstract
The invention discloses a buck-boost converting circuit, which consists of a PWM ware generation circuit, a first switching circuit, a second switching circuit, an energy storage unit, an output-sampling circuit and a phase compensation circuit, the first switching circuit is connected between the energy storage unit and the power supply, and the output-sampling circuit is connected between the output end of the energy storage unit and the PWM ware generation circuit, and is used to sample the voltage outputted by the energy storage unit and feed the voltage of the feedback point of the output-sampling circuit back to the PWM ware generation circuit; the output end of the energy storage unit is coupled to the voltage output end, the second switching circuit is connected between the output end of the energy storage unit and the ground, and the control end of the second switching circuit is coupled to the output end of the first switching circuit, and is connected with the first switching circuit at the same time; the phase compensation circuit is connected in series between the input end of the energy storage unit and the ground, and the feedback point of the output-sampling circuit is also coupled to the phase compensation circuit. The invention adopts the simple circuit to implement the buck-boost conversion of the power supply.
Description
[technical field]
The present invention relates to a kind of buck translation circuit and booster circuit.
[background technology]
In the existing buck conversion, generally adopt the transform method of four switching tubes or isolating transformer, these two kinds of methods implement, not only cost height, and circuit complexity.
[summary of the invention]
The main technical problem to be solved in the present invention is, a kind of buck translation circuit is provided, and can realize stable control.
Another technical problem that the present invention will solve is, a kind of booster circuit is provided, and can realize stable control.
For solving the problems of the technologies described above, the invention provides a kind of buck translation circuit, comprise PWM wave generation circuit, first switching circuit, second switch circuit, energy-storage units and output sampling circuit, described first switching circuit is connected between described energy-storage units and the power supply, the pwm signal of described first switching circuit response PWM wave generation circuit output is used for energy-storage units being connected with power supply or disconnecting; Described output sampling circuit is connected between the output and PWM wave generation circuit of energy-storage units, and the voltage of the described energy-storage units output that is used to sample also returns the Voltage Feedback of the feedback point of described output sampling circuit to described PWM wave generation circuit; The output of described energy-storage units is coupled to voltage output end, described second switch circuit is connected between the output and ground of energy-storage units, the control end of described second switch circuit is coupled to the output of first switching circuit, be used to respond the drive signal of first switching circuit, with the conducting simultaneously of first switching circuit; Also comprise phase compensating circuit, described phase compensating circuit is serially connected between the input and ground of described energy-storage units, and the feedback point of described output sampling circuit also is coupled to phase compensating circuit.
In another embodiment, a kind of booster circuit also is provided, comprise PWM wave generation circuit, second switch circuit, energy-storage units and output sampling circuit, described energy-storage units is used to be connected between power supply and the voltage output end, described second switch circuit is connected between the output and ground of energy-storage units, and the control end of described second switch circuit is coupled to the output of PWM wave generation circuit; Described output sampling circuit is connected between the output and PWM wave generation circuit of energy-storage units, and the voltage of the described energy-storage units output that is used to sample also returns the Voltage Feedback of the feedback point of described output sampling circuit to described PWM wave generation circuit; Also comprise phase compensating circuit, described phase compensating circuit is serially connected between the input and ground of described energy-storage units, and the feedback point of described output sampling circuit also is coupled to phase compensating circuit.
The invention has the beneficial effects as follows:
The present invention carries out phase compensation to buck translation circuit or booster circuit, make feedback point consistent by a kind of special compensation scheme with the phase place of energy-storage units input point, make circuit realize reliablely and stablely control, realized buck conversion and boosting inverter by a kind of simple and low circuit of cost.
[description of drawings]
Fig. 1 is the theory diagram of an embodiment of the present invention;
Fig. 2 is a kind of theory diagram of reduction voltage circuit;
Fig. 3 is reduction voltage circuit output ripple and switching node SW waveform schematic diagram;
Fig. 4 is output waveform and a feedback phase schematic diagram in the reduction voltage circuit;
Fig. 5 is the waveform schematic diagram of feedback point and switching node SW in the reduction voltage circuit;
Fig. 6 is the buck translation circuit block diagram of an embodiment of the present invention;
Fig. 7 is output voltage and a switching node SW phase place schematic diagram in the buck of an embodiment of the present invention;
Fig. 8 is feedback point and a switching node SW phase place schematic diagram in the buck of an embodiment of the present invention;
Fig. 9 is the buck translation circuit block diagram of the another kind of embodiment of the present invention;
Figure 10 is the feedback point after the phase compensation and the phase place schematic diagram of switching node;
Figure 11 is the circuit diagram of the another kind of embodiment of phase compensation among the present invention;
Figure 12 is the circuit diagram of another embodiment of phase compensation among the present invention;
Figure 13 is a kind of embodiment circuit diagram of booster circuit among the present invention.
[embodiment]
The application's feature and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Embodiment one:
Present embodiment has been realized the buck conversion on a kind of basis of simple buck topological circuit.
Please refer to Fig. 1, among a kind of embodiment, the buck translation circuit comprises PWM wave generation circuit, first switching circuit, energy-storage units, output sampling circuit, second switch circuit and phase compensating circuit, described first switching circuit is connected between described energy-storage units and the power supply VIN, the pwm signal of described first switching circuit response PWM wave generation circuit output is used for energy-storage units being connected with power supply VIN or disconnecting; Described output sampling circuit is connected between the output and PWM wave generation circuit of energy-storage units, the voltage of described energy-storage units output is used to sample, and the Voltage Feedback of the feedback point of described output sampling circuit returned described PWM wave generation circuit, the output of described energy-storage units is coupled to voltage output end VOUT.The second switch circuit is connected between the output and ground of energy-storage units, and the control end of described second switch circuit is coupled to the output of first switching circuit, is used to respond the drive signal of first switching circuit, with the conducting simultaneously of first switching circuit.Described phase compensating circuit is connected between the input and ground of energy-storage units, and the feedback point of described output sampling circuit also is coupled to phase compensating circuit.
First switching circuit, second switch circuit can adopt various switching circuits, for example semiconductor switch (for example triode, field effect transistor or IGBT) or mechanical switch, those skilled in the art can be according to existing knowledge and the concrete circuit connection structure of circuit requirement design.Energy storage when energy-storage units is connected at first switching circuit, when first switching circuit disconnects to voltage output end VOUT output voltage.
In one embodiment, described first switching circuit comprises first switching tube, described energy-storage units is a perceptual device, described second switch circuit comprises the second switch pipe, the control utmost point of described first switching tube is coupled to the output of PWM wave generation circuit, the first main electric current break-over utmost point of described first switching tube is coupled to power supply VIN, the second main electric current break-over utmost point of described first switching tube is coupled to the input of described perceptual device, the control utmost point of described second switch pipe is coupled to the second main electric current break-over utmost point of described first switching tube, and the two main electric current break-over utmost points of described second switch pipe are coupled to the output and the ground of described perceptual device respectively.For switching tube is the situation of triode, and the control utmost point refers to the base stage of triode, and two main electric current break-over utmost points are respectively the collector and emitters of triode.For switching tube is the situation of metal-oxide-semiconductor, and the control utmost point refers to the grid of metal-oxide-semiconductor, two drain electrode and source electrodes that the main electric current break-over utmost point is respectively a metal-oxide-semiconductor.
The operation principle of this circuit below is described.
Figure 2 shows that a kind of schematic diagram of simple reduction voltage circuit, the PWM wave generation circuit adopts pwm chip, first switching circuit adopts triode Q1, energy-storage units adopts inductance L 1, be connected with first single-way switch between the input of inductance L 1 and ground, be used for the afterflow of inductance L 1, first single-way switch can adopt diode D1 in one embodiment, the plus earth of diode D1, negative electrode connects the input of inductance L 1.Output sampling circuit comprises first resistance R 1 and second resistance R 2 that is connected between described voltage output end VOUT and the ground, and the intermediate node of described first resistance R 1 and second resistance R 2 is feedback point VFB.
The principle of reduction voltage circuit is as follows:
Adopt fixedly with reduction voltage circuit that the ON time control mode is that example describes, the control principle of the fixedly ON time control model of reduction voltage circuit as shown in Figure 3.During the switching tube conducting of reduction voltage circuit, VIN transmits energy by L1 to VOUT, and output voltage VO UT rises gradually, and switch cut out after set time of conducting.Because main switch Q1 closes, VIN does not transmit energy to VOUT, and this moment, VOUT was under the effect of output loading, and voltage begins to descend, but voltage is when dropping to the value VOUT-L of certain setting, and switching tube is opened again, and regular time of conducting is at interval once more.Certain value thereby VOUT rises again, by the time after switching tube closed, VOUT dropped to VOUT-L again gradually, thereby switching tube is opened once more.So circulation is to guarantee the stable of output voltage.
Under this pattern, control system will feel that the voltage of VOUT-L is that the dividing potential drop of the feedback point VFB by output sampling circuit realizes.The waveform relationship of VFB and VOUT as shown in Figure 4, thereby the phase relation of feedback voltage V FB and switching node as shown in Figure 5.When being main switch triode Q1 conducting, the voltage of feedback point VFB rises, behind pwm chip control triode Q1 conducting certain hour, control triode Q1 disconnects, triode Q1 off period, the voltage of feedback point VFB descends gradually, when the voltage that detects feedback point VFB when pwm chip drops to certain value, control triode Q1 conducting, the voltage of feedback point VFB rises once more.
On the basis of reduction voltage circuit, increasing a switching circuit as shown in Figure 6 is the second switch circuit, thereby realizes the buck conversion.The second switch circuit adopts triode Q2, between the output of inductance L 1 and voltage output end VOUT, be connected with second single-way switch, be used to block by the electric current of voltage output end to the energy-storage units direction, second single-way switch can adopt diode D2 in one embodiment, the anode of diode D2 connects the output of inductance L 1, and negative electrode is used to connect voltage output end VOUT.The operation principle of this circuit is as follows:
Triode Q1 and triode Q2 are the switching tube of synchronous conducting, and wherein the driving of triode Q2 comes from the driving voltage after triode Q1 opens, and belongs to the self-driven mode of this circuit structure.Among a kind of embodiment shown in Figure 6, triode Q1 is the positive-negative-positive triode, and triode Q2 is a NPN type triode, and the base stage of triode Q2 is coupled to the collector electrode of triode Q1 by resistance R 3, the collector coupled of triode Q2 is to the output of inductance L 1, and the emitter-coupled of triode Q2 is to ground.When triode Q1, triode Q2 conducting, power supply VIN transmits energy to inductance L 1, simultaneously, because of the Q2 conducting, the B point is pulled to ground among Fig. 6, and inductance L 1 stops transmitting energy to VOUT, diode D2 plays anti-reaction at this moment, prevents that electric current from inwardly being poured in down a chimney by voltage output end VOUT.When triode Q1, triode Q2 disconnected, inductance L 1 transmitted energy to voltage output end VOUT.
When triode Q1, triode Q2 disconnected, Vout voltage equaled V
L1-V
D2+ V
D1, D1, D2 pressure drop are certain, and the L1 pressure drop can be regulated by changing current changing rate, when current changing rate is big, have V
L1-V
D2+ V
D1Greater than the situation of Vin, thereby realize boosting.For the ease of analyzing, can ignore D1, D2 pressure drop, it is equal to consider that interior weber of L1 one-period is worth, i.e. V
IN* T
ON=V
OUT* (T-T
ON), then have:
When duty ratio D changed between 0-1, VOUT can realize buck.
Circuit shown in Figure 6 is equivalent to first switching circuit when opening, and VIN does not transmit energy to voltage output end VOUT, and when first switching circuit turn-offed, the energy ability that is stored in the inductance L 1 transmitted to VOUT.This energy transfer mode is opposite with reduction voltage circuit.The relation of the voltage of its voltage output end VOUT and the first switching circuit output node SW as shown in Figure 7, fixedly the relation of the voltage of the voltage output end VOUT of ON time control model and the first switching circuit output node SW is opposite with the employing shown in Fig. 3.If still use the fixedly control mode of ON time, promptly still use the fixedly pwm chip of conduction mode, then must cause the pattern of VOUT-L bottom this detection voltage can't operate as normal.Because of reduction voltage circuit fixedly the working method of conduction mode be: switching tube ON time TON fixes, conduction period VOUT voltage rises, close back VOUT and descend, be lower than certain and be worth then switching tube and open and enter next cycle, promptly to open moment VOUT voltage minimum for switching tube.And in the graph of a relation shown in Figure 7, VOUT voltage descends during the switching tube conducting, and voltage is minimum to appear at the initial instantaneous that switching tube is closed, and this moment, control chip detected minimum voltage, needs by logic that the control switch pipe is open-minded more immediately, then can cause the work confusion.As seen after changing reduction voltage circuit into the buck translation circuit, the variation of VOUT is compared with decompression mode, differs 180 degree on phase place.This moment, VOUT was after output sampling circuit carries out the dividing potential drop sampling, and the phase relation of VFB and SW as shown in Figure 8.
More than explanation, under fixing ON time pattern, there is the phase difference of 180 degree between the feedback point VFB of circuit diagram shown in Figure 6 and the SW point, in like manner under on-fixed ON time pattern, still can has a phase difference between the feedback point VFB of circuit diagram shown in Figure 6 and the SW point.
For making feedback point VFB consistent with SW point phase place, no matter making based on the fixing pwm chip of conduction mode still is the pwm chip of other pattern, the buck translation circuit can both normally feed back, in an embodiment of the present invention, introduce phase compensating circuit, connect a phase compensating circuit between the input of described energy-storage units and ground, the feedback point of described output sampling circuit also is coupled to phase compensating circuit.
Figure 9 shows that a kind of embodiment that introduces phase compensating circuit, increased phase compensating circuit on the basis of embodiment shown in Figure 6, phase compensating circuit is connected between the input and ground of inductance L 1.Described phase compensating circuit comprises the resistance branch and first capacitor C 1 of series connection, the other end of resistance branch connects the input of inductance L 1, the other end ground connection of first capacitor C 1, the intermediate node A of the described resistance branch and first capacitor C 1 is coupled to the feedback point VFB of described output sampling circuit.Resistance branch comprises the series connection that the series connection of the 4th resistance R 4 of series connection and second capacitor C, 2, the four resistance R 4 and second capacitor C 2 can be as shown in Figure 9, the 4th resistance R 4 in sequential series, second capacitor C 2 and first capacitor C 1 between the input of inductance L 1 and ground.The series connection of the 4th resistance R 4 and second capacitor C 2 also can be adopted series connection shown in Figure 11, second capacitor C 2 in sequential series, the 4th resistance R 4 and first capacitor C 1 between the input of inductance L 1 and ground.
In the present embodiment, the effect of output sampling circuit is just taken a sample to the average voltage of VOUT, phase compensating circuit is introduced phase signal from switching node SW, its phase relation comes from switching node SW, thereby the phase place to the relative switching node SW of feedback point VFB is corrected, make inductive current consistent with VFB ripple phase place, thus the phase error that the compensation late-class circuit brings.The selection of parameter of the 4th resistance R 4 and first capacitor C 1 has certain influence to phase compensation in the phase compensating circuit, R4, C1 choose excessive, the phase place of switching node SW is too small to the phase effect of feedback point VFB, pwm chip can not detect the VFB ripple well, and R4, C1 selection is too small, VOUT alters a great deal when different loads, and promptly load regulation is poor.About general R4 value 1M, C1 value hundreds of pico farad is suitable.By rationally choosing the parameter value of the 4th resistance R 4 and first capacitor C 1, the phase relation of feedback point VFB and switching node SW as shown in figure 10 after phase compensation, when SW is high (VON), VFB voltage rises, this moment, inductive current increased, when SW was low (VOFF), VFB voltage descended, and this moment, inductive current also reduced.So reach substantially after the phase compensation with reduction voltage circuit in identical phase relation, thereby realize based on the fixedly buck conversion of ON time pattern.
In like manner, by the phase compensation of this phase compensating circuit, also can make based on the feedback of the buck translation circuit of on-fixed ON time pattern (for example based on the fixed frequency control mode) normal.
Embodiment two:
As shown in figure 13, in another embodiment, the mode that the phase place that this phase compensating circuit is ordered to SW compensates can also be applied in the booster circuit of BOOST mode.
The booster circuit of present embodiment comprises PWM wave generation circuit, second switch circuit, energy-storage units, output sampling circuit and phase compensating circuit, described energy-storage units is used to be connected between power supply and the voltage output end, described second switch circuit is connected between the output and ground of energy-storage units, and the control end of described second switch circuit is coupled to the output of PWM wave generation circuit; Described output sampling circuit is connected between the output and PWM wave generation circuit of energy-storage units, and the voltage of the described energy-storage units output that is used to sample also returns the Voltage Feedback of the feedback point of described output sampling circuit to described PWM wave generation circuit; Described phase compensating circuit is serially connected between the input and ground of described energy-storage units, and the feedback point of described output sampling circuit also is coupled to phase compensating circuit.
Compare with embodiment shown in Figure 9, omitted first switching circuit in the present embodiment, energy-storage units is connected between power supply and the voltage output end, and the control end of second switch circuit is coupled to the output of PWM wave generation circuit, and other parts are identical with the foregoing description.In the phase compensating circuit of the foregoing description, the effect of R4, C1 is to make VFB ripple voltage phase place consistent with inductive current, the effect of C2 is the influence of isolating switch node SW DC component to feedback point VFB, to improve load regulation, experimental results show that, added C2 back loading regulation and be optimized to 0.2%, but removed C2 circuit steady operation still by 1%.So in a further embodiment, when DC component hour, phase compensating circuit also can adopt the mode of simplification shown in Figure 12 to carry out the compensation of phase place, and promptly resistance branch comprises that the 4th resistance R 4, the four resistance R 4 and first capacitor C 1 are connected between the input and ground of inductance L 1.
In the foregoing description, first resistance R 1, second resistance R 2 and the 4th resistance R 4 can be resistance independently, it also can be the resistor network that series, parallel or series-parallel connection by resistance form, first capacitor C 1 and second capacitor C 2 also can be electric capacity independently, also can be the capacitance networks that series, parallel or series-parallel connection by electric capacity form.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. buck translation circuit, comprise PWM wave generation circuit, first switching circuit, second switch circuit, energy-storage units and output sampling circuit, described first switching circuit is connected between described energy-storage units and the power supply, the pwm signal of described first switching circuit response PWM wave generation circuit output, be used for energy-storage units being connected with power supply or disconnecting, the output of described energy-storage units is coupled to voltage output end; Described output sampling circuit is connected between the output and PWM wave generation circuit of energy-storage units, and the voltage of the described energy-storage units output that is used to sample also returns the Voltage Feedback of the feedback point of described output sampling circuit to described PWM wave generation circuit; Described second switch circuit is connected between the output and ground of energy-storage units, and the control end of described second switch circuit is coupled to the output of first switching circuit, is used to respond the drive signal of first switching circuit, with the conducting simultaneously of first switching circuit; It is characterized in that: also comprise phase compensating circuit, described phase compensating circuit is serially connected between the input and ground of described energy-storage units, and the feedback point of described output sampling circuit also is coupled to phase compensating circuit.
2. buck translation circuit as claimed in claim 1 is characterized in that: described phase compensating circuit comprises the resistance branch and first electric capacity of series connection, and the intermediate node of the described resistance branch and first electric capacity is coupled to the feedback point of described output sampling circuit.
3. buck translation circuit as claimed in claim 2 is characterized in that: described resistance branch comprises that the 4th resistance or described resistance branch comprise the 4th resistance and second electric capacity of series connection.
4. as each described buck translation circuit in the claim 1 to 3, it is characterized in that: described energy-storage units is a perceptual device.
5. buck translation circuit as claimed in claim 4, it is characterized in that: described buck translation circuit also comprises first single-way switch and second single-way switch, described first single-way switch is connected between the input and ground of energy-storage units, be used for the afterflow of energy-storage units, described second single-way switch is connected between the output and voltage output end of energy-storage units, is used to block by the electric current of voltage output end to the energy-storage units direction.
6. buck translation circuit as claimed in claim 4, it is characterized in that: described first switching circuit comprises first switching tube, described second switch circuit comprises the second switch pipe, the control utmost point of described first switching tube is coupled to the output of PWM wave generation circuit, the first main electric current break-over utmost point of described first switching tube is coupled to power supply, the second main electric current break-over utmost point of described first switching tube is coupled to the input of described perceptual device, the control utmost point of described second switch pipe is coupled to the second main electric current break-over utmost point of described first switching tube, and the two main electric current break-over utmost points of described second switch pipe are coupled to the output and the ground of described perceptual device respectively.
7. buck translation circuit as claimed in claim 4 is characterized in that: described output sampling circuit comprises first resistance and second resistance that is connected between described voltage output end and the ground, and the intermediate node of described first resistance and second resistance is a feedback point.
8. booster circuit, comprise PWM wave generation circuit, second switch circuit, energy-storage units and output sampling circuit, described energy-storage units is used to be connected between power supply and the voltage output end, described second switch circuit is connected between the output and ground of energy-storage units, and the control end of described second switch circuit is coupled to the output of PWM wave generation circuit; Described output sampling circuit is connected between the output and PWM wave generation circuit of energy-storage units, and the voltage of the described energy-storage units output that is used to sample also returns the Voltage Feedback of the feedback point of described output sampling circuit to described PWM wave generation circuit; It is characterized in that: also comprise phase compensating circuit, described phase compensating circuit is serially connected between the input and ground of described energy-storage units, and the feedback point of described output sampling circuit also is coupled to phase compensating circuit.
9. booster circuit as claimed in claim 8 is characterized in that: described phase compensating circuit comprises the resistance branch and first electric capacity of series connection, and the intermediate node of the described resistance branch and first electric capacity is coupled to the feedback point of described output sampling circuit.
10. booster circuit as claimed in claim 9 is characterized in that: described resistance branch comprises that the 4th resistance or described resistance branch comprise the 4th resistance and second electric capacity of series connection.
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| CN2008102179294A CN101753023B (en) | 2008-12-02 | 2008-12-02 | Buck-boost converting circuit and booster circuit |
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| CN2008102179294A CN101753023B (en) | 2008-12-02 | 2008-12-02 | Buck-boost converting circuit and booster circuit |
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| CN101753023A true CN101753023A (en) | 2010-06-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723927A (en) * | 2012-02-03 | 2012-10-10 | 苏州天擎电子通讯有限公司 | Bidirectional integrated filter |
| CN107154731A (en) * | 2017-07-04 | 2017-09-12 | 天津天地伟业信息系统集成有限公司 | A kind of POE electric power systems boosted based on non-isolated |
| WO2018023354A1 (en) * | 2016-08-01 | 2018-02-08 | Intersil Americas LLC | Buck-boost converter power supply with drive circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1159124A1 (en) * | 1984-01-26 | 1985-05-30 | Чувашский государственный университет им.И.Н.Ульянова | Pulse voltage regulator |
| DE10061738A1 (en) * | 2000-12-07 | 2002-06-20 | Siemens Ag | DC/DC converter has controler that deactivates linear regulator after end of start-up phase and then uses output voltage from base unit as operating voltage |
| CN101162868B (en) * | 2006-10-13 | 2011-10-26 | 深圳迈瑞生物医疗电子股份有限公司 | Converter with continuously adjustable output |
| JP2008160904A (en) * | 2006-12-21 | 2008-07-10 | Rohm Co Ltd | Switching regulator |
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2008
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723927A (en) * | 2012-02-03 | 2012-10-10 | 苏州天擎电子通讯有限公司 | Bidirectional integrated filter |
| WO2018023354A1 (en) * | 2016-08-01 | 2018-02-08 | Intersil Americas LLC | Buck-boost converter power supply with drive circuit |
| CN110622404A (en) * | 2016-08-01 | 2019-12-27 | 英特矽尔美国有限公司 | Buck-boost converter power supply with drive circuit |
| US10811972B2 (en) | 2016-08-01 | 2020-10-20 | Intersil Americas LLC | Buck-boost converter power supply with drive circuit |
| CN110622404B (en) * | 2016-08-01 | 2021-09-14 | 英特矽尔美国有限公司 | Power supply, system including the same, and method of operating the same |
| CN107154731A (en) * | 2017-07-04 | 2017-09-12 | 天津天地伟业信息系统集成有限公司 | A kind of POE electric power systems boosted based on non-isolated |
| CN107154731B (en) * | 2017-07-04 | 2023-12-08 | 天津天地伟业信息系统集成有限公司 | POE power supply system based on non-isolated boost |
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| CN101753023B (en) | 2012-11-21 |
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