CN107612333A - A kind of control circuit and method based on two-tube buck-boost converter - Google Patents
A kind of control circuit and method based on two-tube buck-boost converter Download PDFInfo
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Abstract
The present invention proposes a kind of control circuit and method based on two-tube buck-boost converter, including sampling module, compare control module and drive module, the comparison control module includes mode adjustment judging unit, voltage difference matching unit and self-adaptive controller.Its advantage is：The working condition of two-tube buck-boost converter can voluntarily be judged, to control two-tube buck-boost converter to be operated in boost mode, decompression mode or direct mode operation, and circuit is taken over seamlessly between boost mode and decompression mode by the transition of direct mode operation, so as to ensure that the stability of system.
Description
Technical field
The present invention relates to solar energy unmanned plane power-supply system power management techniques field, and in particular to one kind is based on two-tube liter
The control circuit and method of buck converter.
Background technology
Core as solar energy unmanned plane forms, and the main task of solar energy unmanned plane power-supply system is during flight
High-quality, highly reliable uninterruptable power are provided for unmanned plane, to meet the power demand of full mechanomotive force load.
Compared with conventional spatial overlay, solar energy unmanned plane power-supply system has ultra-large, ultra high power, multipotency
The features such as source integrates, is not only needed to realize high-power output, and in order to improve the stability of a system and energy efficiency, power is become
The topological structure and its control strategy of parallel operation propose higher requirement.
Due to unmanned plane in flight course it is influenced by ambient temperature, solar battery array operating voltage changes with environment temperature
And have greatly changed, therefore have decompression concurrently simultaneously（Buck）With boosting（Boost）The buck of regulative mode（Buck-
Boost）Converter is easy to implement the power conversion of wide input voltage range.
Buck（Buck-Boost）Converter conversion efficiency has significant raising, but the topology itself has one and lacked
Fall into：It is being depressured（Buck）With boosting（Boost）Saltus step can occur for the moment of two kinds of regulative mode switchings, the dutycycle of switching tube,
This means output voltage will produce larger pulsation when regulative mode switches, considering from the stability angle of system can not
Take.
In order to overcome drawbacks described above, original control strategy is improved, DC/DC circuit Buck patterns with
A direct mode operation is added between Boost patterns, so as to utilize the transition of direct mode operation, and then proposes a kind of two-tube buck
Converter, but taking over seamlessly between Buck patterns, Boost patterns and direct mode operation how is realized, do not control suitably also
Method.
The content of the invention
, can be voluntarily it is an object of the invention to provide a kind of control circuit and method based on two-tube buck-boost converter
Judge the working condition of two-tube buck-boost converter, control converter is operated in Buck patterns, Boost patterns or straight-through mould
Formula, and converter is smoothly cut between Buck patterns and Boost patterns by the transition of direct mode operation
Change, so as to ensure that the stability of system.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of control circuit based on two-tube buck-boost converter, the input connection sun of described two-tube buck-boost converter
Energy cell array, output end connect batteries and load respectively；It is characterized in that described control circuit includes：
Sampling module, for gathering the input voltage U of two-tube buck-boost converterin, input current Iin, output capacitance electric current Ico
And output voltage UoInformation；
Compare control module, include mode adjustment judging unit, voltage difference matching unit and self-adaptive controller；Pattern
Judging unit is adjusted to be used to obtain output capacitance electric current I from sampling module under the control of voltage difference matching unitcoSampling
Information, and output mode adjustment judged result gives voltage difference matching unit；Voltage difference matching unit is used for from sampling module
Obtain input voltage UinAnd output voltage UoSample information, and binding pattern adjustment judging unit mode adjustment judge knot
Fruit exports the operating mode information of two-tube buck-boost converter, and the operating mode information includes buck-boost mode or direct mode operation；
Self-adaptive controller obtains input voltage U according to sampling modulein, input current IinSample information and voltage difference
Operating mode information with unit exports corresponding boost mode control information or decompression mode control information or direct mode operation control
Information processed is to drive module；
Drive module, input connect the output end of comparison control circuit, and output end connection boosted switch pipe Q1 and decompression are opened
Pipe Q2 is closed, with the boost mode control information or decompression mode control information or direct mode operation exported according to self-adaptive controller
Control information come drive two-tube buck-boost converter corresponding modes work.
The above-mentioned control circuit based on two-tube buck-boost converter, wherein：
Described two-tube buck-boost converter includes boosted switch pipe Q1 and step-down switching pipe Q2；When boosted switch pipe Q1 is in
Normal open state, step-down switching pipe Q2 are in modulation condition, and two-tube buck-boost converter is in boost mode；As boosted switch pipe Q1
In modulation condition, step-down switching pipe Q2 is in normal off state, and two-tube buck-boost converter is in decompression mode；Work as boosted switch
Pipe Q1 is in normal open state, and step-down switching pipe Q2 is in normal off state, and two-tube buck-boost converter is in direct mode operation.
The above-mentioned control circuit based on two-tube buck-boost converter, wherein, in described comparison control module：
Wherein, described mode adjustment judging unit includes：
Integrating circuit, the output capacitance electric current I that input is exported by a switching tube S1 connections sampling modulecoSample information；
First comparator, one default comparison voltage Δ V1 of negative terminal input, anode connect the output end of integrating circuit；
Wherein, described voltage difference matching unit includes：
Absolute difference circuit, a pair of inputs connect the input voltage U of sampling module output respectivelyin, output voltage UoSampling
Information；
Adder, a pair of inputs connect the output end of absolute difference circuit and the output end of first comparator respectively；
Bleeder circuit, output end connection adaptation control circuit；
Second comparator, negative terminal connect the output end of adder, one default comparison voltage Δ V2 of anode input, and output end connects respectively
Connect output end, switching tube S1 and the adaptation control circuit of first comparator.
The above-mentioned control circuit based on two-tube buck-boost converter, wherein, described adaptation control circuit includes：
MPPT control circuits, a pair of inputs connect the input voltage U of sampling module output respectivelyin, input current IinSampling
Information, MPPT control circuits pass through to input voltage UinWith input current IinSampled value is adjusted so that its product is maximum；
Subtracter, anode connect the output end of MPPT control circuits, and negative terminal connects the output end of the second comparator；
Maximum value circuit is taken, a pair of inputs connect the output end of subtracter and the output end of bleeder circuit respectively；
3rd comparator, anode connect the output end for taking maximum value circuit, and negative terminal connects triangle of the voltage range at [V3, V4]
Ripple, output end connection drive module；
4th comparator, the output end of anode bonding pad maximum value circuit, negative terminal connect triangle of the voltage range at [V1, V2]
Ripple, output end connection drive module.
The above-mentioned control circuit based on two-tube buck-boost converter, wherein：
V3 ＞ V2.
A kind of control method based on two-tube buck-boost converter, it is characterized in that：
Sampling module gathers the input voltage U of two-tube buck-boost converterin, input current Iin, output capacitance electric current IcoIt is and defeated
Go out voltage UoInformation；
Mode adjustment judging unit obtains output capacitance electric current I under the control of voltage difference matching unit from sampling moduleco's
Sample information, and output mode adjustment judged result gives voltage difference matching unit；
Voltage difference matching unit obtains input voltage U from sampling moduleinAnd output voltage UoSample information, and combine mould
The mode adjustment judged result of formula adjustment judging unit exports the operating mode information of two-tube buck-boost converter, the mode of operation
Packet contains buck-boost mode or direct mode operation；
Self-adaptive controller obtains input voltage U according to sampling modulein, input current IinSample information and voltage difference
The operating mode information for being worth matching unit exports corresponding boost mode control information or decompression mode control information or straight-through mould
Formula control information is to drive module；
The boost mode control information or decompression mode control information or straight-through that drive module exports according to self-adaptive controller
Mode control information come drive two-tube buck-boost converter corresponding modes work.
The present invention has advantages below compared with prior art：
1st, can voluntarily judge the working condition of two-tube buck-boost converter, so as to control converter be operated in Buck patterns,
Boost patterns or direct mode operation, and converter can effectively be made in Buck patterns and Boost by the transition of direct mode operation
Taken over seamlessly between pattern, so as to ensure that the stability of system；
2nd, it is simple and reliable, it can be realized by way of hardware circuit, flown for the near space using solar energy unmanned plane as representative
The energy supply of row device provides reference and help.
Brief description of the drawings
Fig. 1 is annexation figure of the control circuit with two-tube buck-boost converter of the present invention；
Fig. 2 is the topological circuit figure of the two-tube buck-boost converter in embodiments of the invention；
Fig. 3 is the circuit diagram of the control circuit in embodiments of the invention.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferable specific embodiment in detail, the present invention is further elaborated.
Solar energy unmanned plane power-supply system is mainly by solar battery array, two-tube buck-boost converter, control circuit, lithium ion
Batteries etc. form.It is battery while solar battery array is load supplying when bearing power is smaller in illumination period
Group charging；When bearing power is larger or during solar battery array power output deficiency, solar battery array and batteries joint are negative
Carry power supply.In the shade phase, batteries are individually for load supplying.That is, as shown in figure 1, the input of two-tube buck-boost converter
Solar array is connected, output end connects batteries and load respectively.
As shown in Fig. 2 two-tube buck-boost converter generally comprises boosted switch pipe Q1 and step-down switching pipe Q2, two-tube liter
Buck converter has three kinds of mode of operations：
Boost mode：Switching tube Q1 is in normal open state, and switching tube Q2 is in modulation condition；
Decompression mode：Switching tube Q1 is in modulation condition, and switching tube Q2 is in normal off state；
Direct mode operation：Switching tube Q1 is in normal open state, and switching tube Q2 is in normal off state.
When two-tube buck-boost converter is operated in boosting or decompression mode, output capacitance CoutNormal discharge and recharge, its electric current
Value IcoIntegration in a cycle is zero；When two-tube buck-boost converter is operated in direct mode operation, output capacitance CoutLocate always
In charge or discharge state, its current value IcoIntegration be that voltage change is not zero.
As shown in figure 3, being based on above-mentioned principle, the present invention proposes a kind of control electricity based on two-tube buck-boost converter
Road, comprising：
Sampling module, for gathering the input voltage U of two-tube buck-boost converterin, input current Iin, output capacitance electric current Ico
And output voltage UoInformation；
Compare control module, include mode adjustment judging unit, voltage difference matching unit and self-adaptive controller；Pattern
Judging unit is adjusted to be used to obtain output capacitance electric current I from sampling module under the control of voltage difference matching unitcoSampling
Information, and output mode adjustment judged result gives voltage difference matching unit；Voltage difference matching unit is used for from sampling module
Obtain input voltage UinAnd output voltage UoSample information, and binding pattern adjustment judging unit mode adjustment judge knot
Fruit exports the operating mode information of two-tube buck-boost converter, and the operating mode information includes buck-boost mode or direct mode operation；
Self-adaptive controller obtains input voltage U according to sampling modulein, input current IinSample information and voltage difference
Operating mode information with unit exports corresponding boost mode control information or decompression mode control information or direct mode operation control
Information processed is to drive module；
Drive module, input connect the output end of comparison control circuit, and output end connection boosted switch pipe Q1 and decompression are opened
Pipe Q2 is closed, with the boost mode control information or decompression mode control information or direct mode operation exported according to self-adaptive controller
Control information come drive two-tube buck-boost converter corresponding modes work.Drive module can include Buck（Decompression）Driving electricity
Road and Boost（Boosting）Drive circuit.
In described comparison control module：
Wherein, described mode adjustment judging unit includes：
Integrating circuit, the output capacitance electric current I that input is exported by a switching tube S1 connections sampling modulecoSample information；
First comparator COM1, one default comparison voltage Δ V1 of negative terminal input, anode connect the output end of integrating circuit, Δ V1 roots
Selected according to requirement of engineering；
Wherein, described voltage difference matching unit includes：
Absolute difference circuit, a pair of inputs connect the input voltage U of sampling module output respectivelyin, output voltage UoSampling
Information；
Adder, a pair of inputs connect the output end of absolute difference circuit and first comparator COM1 output end respectively；
Bleeder circuit, output end connection adaptation control circuit；
Second comparator COM2, negative terminal connect the output end of adder, one default comparison voltage Δ V2 of anode input, output end point
Not Lian Jie first comparator COM1 output end, switching tube S1 and adaptation control circuit, Δ V2 carries out according to requirement of engineering
Selection.
Described adaptation control circuit includes：
MPPT control circuits, a pair of inputs connect the input voltage U of sampling module output respectivelyin, input current IinSampling
Information, MPPT control circuits pass through to input voltage UinWith input current IinSampled value is adjusted so that and its product is maximum,
Even if solar battery array Maximum Power Output；
Subtracter, anode connect the output end of MPPT control circuits, and negative terminal connects the second comparator COM2 output end；
Maximum value circuit is taken, a pair of inputs connect the output end of subtracter and the output end of bleeder circuit respectively；
3rd comparator COM3, anode connect the output end for taking maximum value circuit, and negative terminal connects a voltage range at [V3, V4]
Triangular wave, output end connection drive module；
4th comparator COM4, the output end of anode bonding pad maximum value circuit, negative terminal connect a voltage range at [V1, V2]
Triangular wave, output end connection drive module.In the present embodiment, V3 ＞ V2.
The invention also provides a kind of control method based on two-tube buck-boost converter, comprising：
Sampling module gathers the input voltage U of two-tube buck-boost converterin, input current Iin, output capacitance electric current IcoIt is and defeated
Go out voltage UoInformation；
Mode adjustment judging unit obtains output capacitance electric current I under the control of voltage difference matching unit from sampling moduleco's
Sample information, and output mode adjustment judged result gives voltage difference matching unit；
Voltage difference matching unit obtains input voltage U from sampling moduleinAnd output voltage UoSample information, and combine mould
The mode adjustment judged result of formula adjustment judging unit exports the operating mode information of two-tube buck-boost converter, the mode of operation
Packet contains buck-boost mode or direct mode operation；
Self-adaptive controller obtains input voltage U according to sampling modulein, input current IinSample information and voltage difference
The operating mode information for being worth matching unit exports corresponding boost mode control information or decompression mode control information or straight-through mould
Formula control information is to drive module；
The boost mode control information or decompression mode control information or straight-through that drive module exports according to self-adaptive controller
Mode control information come drive two-tube buck-boost converter corresponding modes work.
The present invention operation principle be：
As input voltage UinWith output voltage UoThe absolute value of difference when being more than Δ V2, converter is operated in boosting or decompression mould
Formula, comprise the following steps that：
Step 1：The input of absolute difference circuit is input voltage UinSampled value and output voltage UoSampled value, input voltage sampling
UinWith output voltage UoSample rate is 1, and when the output of absolute difference circuit is more than Δ V2, the output of adder is naturally larger than Δ
V2, anode input value Δ V2, the second comparator COM2 output more than the second comparator COM2 is zero, and bleeder circuit output is also
Zero.
Step 2：Switch S1 control signal is the second comparator COM2 output, the second comparator COM2 outputs zero, is opened
Pipe S1 normal offs to be closed, cause integrating circuit not work, its output is zero, the negative terminal input Δ V2 less than first comparator COM2, the
One comparator COM1 outputs are zero.
Step 3：The input signal of MPPT control circuits is input voltage UinSampling and input current IinSampling, MPPT controls
The major function of circuit processed is by input voltage UinWith input current IinSampled value be adjusted so that its product is most
Greatly, even if solar battery array Maximum Power Output.Second comparator COM2 and bleeder circuit output are zero, MPPT control circuits
After subtracting zero by subtracter, exported with original value, and by taking maximum value circuit to input the ratios of the 3rd comparator COM3 and the 4th
Compared with device COM4 anode.
Step 4：3rd comparator COM3 negative terminal triangular waves trig1 voltage range [V3, V4], the 4th comparator negative terminal three
Angle ripple trig2 voltage range [V1, V2], setting V3 are more than V2；
Step 5：MPPT control circuits are while solar battery array Maximum Power Output is ensured, model of its output voltage in permission
Fluctuated in enclosing, the triangular wave of Auto-matching [V1, V2] and the triangular wave of [V3, V4] so that converter is operated in boosting
Or decompression mode.As output voltage UoSubtract input voltage UinDuring more than Δ V2, the output valve of MPPT control circuits is more than V3
Less than V4, the 3rd comparator COM3 output PWM waveforms, and modulation condition is in by Boost drive circuit adjusting switch pipes Q2；
4th comparator COM4 exports high level, and normally open, converter work are in by Buck drive circuit adjusting switch pipes Q1
In boost mode.As input voltage UinSubtract output voltage UoDuring more than Δ V2, the output valve of MPPT control circuits is small more than V1
In V2, the 3rd comparator COM3 output low levels, normal off state is in by Boost drive circuit adjusting switch pipes Q2；4th
Comparator COM4 exports PWM waveform, is in modulation condition by Buck drive circuit adjusting switch pipes Q1, converter is operated in drop
Die pressing type.
As input voltage UinWith output voltage UinThe absolute value of difference when being less than Δ V2, converter is operated in direct mode operation,
Comprise the following steps that：
Step 1：The output of absolute difference circuit is less than Δ V2, while first comparator COM1 outputs are zero, the output of adder
Less than Δ V2, therefore the second comparator COM2 exports high level.
Step 2：Switching tube S1 is closed, and integrating circuit input signal samples for the output current of converter, therefore integrates electricity
The output on road is to start the voltage change of converter output capacitance this moment, when integrating circuit output valve is less than Δ V1, first
Comparator COM1 outputs are still zero, do not influence the output valve of adder.
Step 3：Second comparator COM2 exports high level, and the output valve of MPPT control circuits subtracts the second comparator COM2
Output valve after vanishing.Second comparator COM2 output valve is after bleeder circuit partial pressure, by taking maximum value circuit to export
To the 3rd comparator COM3 and the 4th comparator COM4 anode.
Step 4：Bleeder circuit output valve is less than V3 more than V2, therefore, the 3rd comparator COM3 output high level, the 4th ratio
Low level is exported compared with device COM4, Boost drive circuit controlling switch pipes Q2 is in normal off state, Buck drive circuit controlling switches
Pipe Q1 is in normal open state, and now, buck-boost converter is in pass-through state, and solar battery array is directly powered for rear end.
As input voltage UinWith output voltage UoThe absolute value of difference be more than Δ V1 again, converter works by direct mode operation
Boosting or decompression mode are switched to, is comprised the following steps that：
Under converter pass-through state, switching tube S1 closures, integrating circuit input signal samples for the output current of converter, therefore
The output of integrating circuit is to start the changing value of the voltage change of converter output capacitance, i.e. converter output voltage this moment,
When integrating circuit output valve is more than Δ V1, first comparator COM1 output high level, therefore adder output high level, second
It is zero, MPPT control modules control circuit again that comparator COM2 negative terminal voltage, which is more than Δ V2, the second comparator COM2 output,
Boosting or decompression mode are operated in, realizes converter by direct mode operation to boosting or decompression mode takes over seamlessly.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1. a kind of control circuit based on two-tube buck-boost converter, the input connection of described two-tube buck-boost converter is too
Positive energy cell array, output end connect batteries and load respectively；Characterized in that, described control circuit includes：
Sampling module, for gathering the input voltage U of two-tube buck-boost converterin, input current Iin, output capacitance electric current Ico
And output voltage UoInformation；
Compare control module, include mode adjustment judging unit, voltage difference matching unit and self-adaptive controller；Pattern
Judging unit is adjusted to be used to obtain output capacitance electric current I from sampling module under the control of voltage difference matching unitcoSampling
Information, and output mode adjustment judged result gives voltage difference matching unit；Voltage difference matching unit is used for from sampling module
Obtain input voltage UinAnd output voltage UoSample information, and binding pattern adjustment judging unit mode adjustment judge knot
Fruit exports the operating mode information of two-tube buck-boost converter, and the operating mode information includes buck-boost mode or direct mode operation；
Self-adaptive controller obtains input voltage U according to sampling modulein, input current IinSample information and voltage difference
Operating mode information with unit exports corresponding boost mode control information or decompression mode control information or direct mode operation control
Information processed is to drive module；
Drive module, input connect the output end of comparison control circuit, and output end connection boosted switch pipe Q1 and decompression are opened
Pipe Q2 is closed, with the boost mode control information or decompression mode control information or direct mode operation exported according to self-adaptive controller
Control information come drive two-tube buck-boost converter corresponding modes work.
2. the control circuit as claimed in claim 1 based on two-tube buck-boost converter, it is characterised in that：
Described two-tube buck-boost converter includes boosted switch pipe Q1 and step-down switching pipe Q2；When boosted switch pipe Q1 is in
Normal open state, step-down switching pipe Q2 are in modulation condition, and two-tube buck-boost converter is in boost mode；As boosted switch pipe Q1
In modulation condition, step-down switching pipe Q2 is in normal off state, and two-tube buck-boost converter is in decompression mode；Work as boosted switch
Pipe Q1 is in normal open state, and step-down switching pipe Q2 is in normal off state, and two-tube buck-boost converter is in direct mode operation.
3. the control circuit as claimed in claim 1 based on two-tube buck-boost converter, it is characterised in that described comparison control
In molding block：
Wherein, described mode adjustment judging unit includes：
Integrating circuit, the output capacitance electric current I that input is exported by a switching tube S1 connections sampling modulecoSample information；
First comparator, one default comparison voltage Δ V1 of negative terminal input, anode connect the output end of integrating circuit；
Wherein, described voltage difference matching unit includes：
Absolute difference circuit, a pair of inputs connect the input voltage U of sampling module output respectivelyin, output voltage UoSampling
Information；
Adder, a pair of inputs connect the output end of absolute difference circuit and the output end of first comparator respectively；
Bleeder circuit, output end connection adaptation control circuit；
Second comparator, negative terminal connect the output end of adder, one default comparison voltage Δ V2 of anode input, and output end connects respectively
Connect output end, switching tube S1 and the adaptation control circuit of first comparator.
4. the control circuit as claimed in claim 3 based on two-tube buck-boost converter, it is characterised in that described is adaptive
Control circuit includes：
MPPT control circuits, a pair of inputs connect the input voltage U of sampling module output respectivelyin, input current IinSampling
Information, MPPT control circuits pass through to input voltage UinWith input current IinSampled value is adjusted so that its product is maximum；
Subtracter, anode connect the output end of MPPT control circuits, and negative terminal connects the output end of the second comparator；
Maximum value circuit is taken, a pair of inputs connect the output end of subtracter and the output end of bleeder circuit respectively；
3rd comparator, anode connect the output end for taking maximum value circuit, and negative terminal connects triangle of the voltage range at [V3, V4]
Ripple, output end connection drive module；
4th comparator, the output end of anode bonding pad maximum value circuit, negative terminal connect triangle of the voltage range at [V1, V2]
Ripple, output end connection drive module.
5. the control circuit as claimed in claim 4 based on two-tube buck-boost converter, it is characterised in that：
V3 ＞ V2.
A kind of 6. control method based on two-tube buck-boost converter, it is characterised in that：
Sampling module gathers the input voltage U of two-tube buck-boost converterin, input current Iin, output capacitance electric current IcoIt is and defeated
Go out voltage UoInformation；
Mode adjustment judging unit obtains output capacitance electric current I under the control of voltage difference matching unit from sampling moduleco's
Sample information, and output mode adjustment judged result gives voltage difference matching unit；
Voltage difference matching unit obtains input voltage U from sampling moduleinAnd output voltage UoSample information, and combine mould
The mode adjustment judged result of formula adjustment judging unit exports the operating mode information of two-tube buck-boost converter, the mode of operation
Packet contains buck-boost mode or direct mode operation；
Self-adaptive controller obtains input voltage U according to sampling modulein, input current IinSample information and voltage difference
The operating mode information of matching unit exports corresponding boost mode control information or decompression mode control information or direct mode operation
Control information is to drive module；
The boost mode control information or decompression mode control information or straight-through that drive module exports according to self-adaptive controller
Mode control information come drive two-tube buck-boost converter corresponding modes work.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108964197A (en) * | 2018-08-07 | 2018-12-07 | 深圳宝砾微电子有限公司 | A kind of charging circuit and power supply device |
| CN109494976A (en) * | 2018-12-06 | 2019-03-19 | 福建睿能科技股份有限公司 | A kind of Switching Power Supply and its driving circuit |
| CN110168892A (en) * | 2018-08-02 | 2019-08-23 | 深圳欣锐科技股份有限公司 | A kind of traditional direct current booster circuit |
| CN111049360A (en) * | 2019-12-31 | 2020-04-21 | 广州金升阳科技有限公司 | Voltage reduction circuit and voltage reduction control method |
| CN111262434A (en) * | 2020-02-20 | 2020-06-09 | 上海南芯半导体科技有限公司 | Buck-boost DC-DC converter and control method |
| CN112467983A (en) * | 2020-12-16 | 2021-03-09 | 上海空间电源研究所 | Control circuit based on buck-boost synchronous regulator |
| CN114884354A (en) * | 2022-07-11 | 2022-08-09 | 禹创半导体(深圳)有限公司 | Direct-current power supply conversion control framework capable of being used for boosting or reducing voltage |
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| CN110168892A (en) * | 2018-08-02 | 2019-08-23 | 深圳欣锐科技股份有限公司 | A kind of traditional direct current booster circuit |
| CN108964197A (en) * | 2018-08-07 | 2018-12-07 | 深圳宝砾微电子有限公司 | A kind of charging circuit and power supply device |
| CN108964197B (en) * | 2018-08-07 | 2020-11-17 | 深圳宝砾微电子有限公司 | Charging circuit and power supply device |
| CN109494976A (en) * | 2018-12-06 | 2019-03-19 | 福建睿能科技股份有限公司 | A kind of Switching Power Supply and its driving circuit |
| CN111049360A (en) * | 2019-12-31 | 2020-04-21 | 广州金升阳科技有限公司 | Voltage reduction circuit and voltage reduction control method |
| CN111049360B (en) * | 2019-12-31 | 2021-05-18 | 广州金升阳科技有限公司 | Voltage reduction circuit and voltage reduction control method |
| CN111262434A (en) * | 2020-02-20 | 2020-06-09 | 上海南芯半导体科技有限公司 | Buck-boost DC-DC converter and control method |
| CN111262434B (en) * | 2020-02-20 | 2022-03-29 | 上海南芯半导体科技股份有限公司 | Buck-boost DC-DC converter and control method |
| CN112467983A (en) * | 2020-12-16 | 2021-03-09 | 上海空间电源研究所 | Control circuit based on buck-boost synchronous regulator |
| CN114884354A (en) * | 2022-07-11 | 2022-08-09 | 禹创半导体(深圳)有限公司 | Direct-current power supply conversion control framework capable of being used for boosting or reducing voltage |
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