CN107482932A - A kind of self-powered double pole triode drive circuit and switching power circuit - Google Patents
A kind of self-powered double pole triode drive circuit and switching power circuit Download PDFInfo
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- CN107482932A CN107482932A CN201710774136.1A CN201710774136A CN107482932A CN 107482932 A CN107482932 A CN 107482932A CN 201710774136 A CN201710774136 A CN 201710774136A CN 107482932 A CN107482932 A CN 107482932A
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- Prior art keywords
- double pole
- power supply
- power
- pole triode
- circuit
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/605—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors with galvanic isolation between the control circuit and the output circuit
- H03K17/61—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors with galvanic isolation between the control circuit and the output circuit using transformer coupling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of self-powered double pole triode drive circuit and switching power circuit.The double pole triode drive circuit includes：Double pole triode, power switch, transformer, drive current source, power supply capacitor, power switch and closing switch.The present invention is when charge cycle starts, drive current source is closed to stop powering for double pole triode, then, by closing power switch and turning on power switch, charged to drive the electric current in double pole triode for power supply capacitor, when power supply capacitor charging reaches preset requirement, double pole triode is closed by turning on closing switch, terminate power supply capacitor charging, and realize the power supply capacitor voluntarily to charge, extra supplementary power can be provided for double pole triode, and then eliminate the design of assists winding, reduce peripheral circuit, save system cost, additionally provide safe and reliable power bipolar triode type of drive.
Description
Technical field
The present invention relates to drive circuit technical field, more particularly to a kind of self-powered double pole triode drive circuit and
Switching power circuit.
Background technology
Fig. 1 is a kind of rough schematic view of traditional flyback switching power circuit, including one is connected to input AC electricity
The rectifier bridge of pressure, is connected to the bus capacitor C10 of rectification bridge output end, and one starts resistance Rst0, a power supply capacitor Cvcc0, and one
Power switch M10, transformer a T10, an output commutation diode D1 and output capacitance a C30, a sampling resistor Rcs0.It is necessary
Ground, in addition to a transformer assists winding, one power supply diode Dvcc, power supply diode Dvcc be connected to transformer auxiliary around
Between group and power supply capacitor Cvcc0.
When power switch M10 is closed, secondary commutation diode D1 conductings, now, the voltage in transformer assists winding
To be in direct ratio on the occasion of and with voltage on output capacitance C30, this auxiliary winding voltage can be that power supply capacitor Cvcc0 powers,
The information of output voltage can also be provided.
This traditional switch power driving circuit major defect is：
In order to meet the driving power consumption requirements of power bipolar triode, transformer must carry assists winding.Add
System cost and complexity, reduce reliability.
The content of the invention
In order to solve problem of the prior art, the embodiments of the invention provide a kind of self-powered double pole triode to drive
Circuit and switching power circuit.The technical scheme is as follows：
On the one hand, the embodiments of the invention provide a kind of self-powered double pole triode drive circuit, including：It is ambipolar
Triode, power switch, transformer, drive current source, the power supply capacitor for providing power supply for drive current source, power supply are opened
Pass and closing switch,
When each charge cycle starts, stop supplying for the double pole triode by closing the drive current source
Electricity, it is the confession to drive the electric current in the double pole triode by closing power switch and turning on the power switch
Electric capacity charges；
When power supply capacitor charging reaches preset requirement, closed by turning on the closing switch described ambipolar
Triode, terminate the power supply capacitor charging.
In the above-mentioned double pole triode drive circuit of the embodiment of the present invention, the colelctor electrode of the double pole triode with
The electrical connection of the transformer, the emitter stage drain electrode with the power switch and the power supply respectively of the double pole triode
One end electrical connection of switch, the other end of the power switch electrically connect with the positive pole of the power supply capacitor, the power supply capacitor
Positive pole also electrically connected with the drive current source, the negative pole of the power supply capacitor electrically connects with the source electrode of the power switch,
The one end of the base stage of the double pole triode respectively with the drive current source and the closing switch electrically connects, the closing
The other end ground connection of switch.
In the above-mentioned double pole triode drive circuit of the embodiment of the present invention, in addition to：Sampling resistor, control circuit,
Sample circuit,
The sample circuit is used for the sample information obtained from the sampling resistor,
The control circuit is used for the sample information provided according to the sample circuit, the driving as described in default SECO
Current source, the power switch, the power switch and the closing switch are turned on and off.
In the above-mentioned double pole triode drive circuit of the embodiment of the present invention, the control control circuit is additionally operable to according to institute
The information of voltage in power supply capacitor is stated, adjusts the ON time of the power switch.
In the above-mentioned double pole triode drive circuit of the embodiment of the present invention, one end of the sampling resistor respectively with institute
State the source electrode of power switch and the negative pole electrical connection of the power supply capacitor, the other end of the sampling resistor and the sample circuit
Electrical connection, the control circuit respectively with the sample circuit, grid of the power switch, the drive current source, described
Power switch and closing switch electrical connection.
In the above-mentioned double pole triode drive circuit of the embodiment of the present invention, the drive current source is opened in drive cycle
During the beginning, the driving current of the non-definite value of excess is first provided, after continuing expeced time, is provided according to the voltage on the sampling resistor
Into the driving current of preset ratio relation.
In the above-mentioned double pole triode drive circuit of the embodiment of the present invention, the power switch is that voltage class is low
N-type FET.
On the other hand, the embodiments of the invention provide a kind of switching power circuit, the switching power circuit to include：As above
Described double pole triode drive circuit.
In the above-mentioned switching power circuit of the embodiment of the present invention, the topological classification of the switching power circuit is flyback
Any one of topology, buck topology and buck-boost type topology.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Stop powering for double pole triode by when charge cycle starts, closing drive current source, then, pass through pass
Close power switch and turn on power switch, charged to drive the electric current in double pole triode for power supply capacitor, work as power supply capacitor
When charging reaches preset requirement, double pole triode is closed by turning on closing switch, terminates power supply capacitor charging, and is realized
The power supply capacitor voluntarily to charge, extra supplementary power can be provided for double pole triode, and then eliminate the design of assists winding,
Peripheral circuit is reduced, system cost is saved, additionally provides safe and reliable power bipolar triode type of drive.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of rough schematic view for switching power circuit that prior art provides；
Fig. 2 is a kind of structural representation for double pole triode drive circuit that the embodiment of the present invention one provides；
Fig. 3 is a kind of work wave schematic diagram for double pole triode drive circuit that the embodiment of the present invention one provides；
Fig. 4 is a kind of structural representation for switching power circuit that the embodiment of the present invention two provides.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
The embodiments of the invention provide a kind of self-powered double pole triode drive circuit, and referring to Fig. 2, this ambipolar three
Pole pipe drive circuit can include：Double pole triode Q1, power switch S1, transformer T1, drive current source I1, for for drive
Streaming current source I1 provides power supply capacitor Cvcc, power switch S2 and the closing switch S3 of power supply, double pole triode Q1 collection
Electrode and transformer T1 electrical connection, double pole triode Q1 the emitter stage drain electrode with power switch S1 and power switch respectively
S2 one end electrical connection, the power switch S2 other end electrically connect with power supply capacitor Cvcc positive pole, and power supply capacitor Cvcc is just
Pole also electrically connects with drive current source I1, and power supply capacitor Cvcc negative pole electrically connects with power switch S1 source electrode, and ambipolar three
The one end of pole pipe Q1 base stage respectively with drive current source I1 and closing switch S3 electrically connects, closing switch S3 another termination
Ground.
When each charge cycle starts, stop powering for double pole triode Q1 by closing drive current source I1, lead to
Cross closing power switch S1 and turn on power switch S2, filled to drive the electric current in double pole triode Q1 for power supply capacitor Cvcc
Electricity；When power supply capacitor Cvcc chargings reach preset requirement, double pole triode Q1 is closed by turning on closing switch S3, is tied
Beam power supply capacitor Cvcc charges.
In traditional switching power circuit, because the base current of power bipolar FET needs its colelctor electrode electric
More than/10th of stream, provided so must be supplemented by assists winding.In the present embodiment, start in each charge cycle
When, stop powering for double pole triode Q1 by closing drive current source I1, by closing power switch S1 and turning on power supply
S2 is switched, is charged to drive the electric current in double pole triode Q1 for power supply capacitor Cvcc, and power supply capacitor Cvcc can be then
Drive current source I1 provides extra supplementary power, and then eliminates the design of assists winding, reduces peripheral circuit, save system into
This, additionally provides safe and reliable power bipolar triode type of drive.In actual applications, power switch S1 can be electricity
Press the low N-type FET of grade.
It should be noted that referring to Fig. 3, the double pole triode drive circuit is driven by drive cycle, its
In, the time shown in t2 is charge cycle, that is, by controlling various switches to realize what is charged to power supply capacitor Cvcc
Cycle.
Specifically, can also include referring to Fig. 2, the double pole triode drive circuit：Sampling resistor RCS, control circuit
100th, sample circuit 200, sampling resistor RCS one end respectively with power switch S1 source electrode and power supply capacitor Cvcc negative electricity
Connection, the sampling resistor RCS other end electrically connects with sample circuit 200, control circuit 100 respectively with sample circuit 200, power
Switch S1 grid, drive current source I1, power switch S2 and closing switch S3 electrical connections.
Wherein, sample circuit 200 is used for the sample information obtained from sampling resistor RCS, and sampling resistor RCS opens with power
S1 electrical connections are closed, can effectively gather the current information on transformer T1, sample circuit 200 is by gathering sampling resistor RCS
On current information pay close attention to transformer T1 peak point current.
The sample information that control circuit 100 is used to be provided according to sample circuit 200 is come by default SECO driving current
Source I1, power switch S1, power switch S2 and closing switch S3 are turned on and off, and realize the tune to whole drive cycle
Section.
Further, control control circuit 100 is additionally operable to, according to the information of voltage on power supply capacitor Cvcc, adjust power switch
S1 ON time, and then realize the regulation to charge cycle.
It should be noted that power supply capacitor Cvcc provides extra supplementary power in the base stage for double pole triode Q1
When, also provide operating current for control circuit 100.
With reference to Fig. 2 and Fig. 3, to illustrate the driving process of the double pole triode drive circuit：
When each drive cycle starts, power switch S1 takes the lead in being opened, now double pole triode Q1 emitter stage
Voltage is equal to circuit, meanwhile, drive current source I1 starts base stage of the output current to double pole triode Q1, while electricity of powering
Hold Cvcc and auxiliary power supply is carried out to double pole triode Q1 base stage also by drive current source I1.In the design example of optimization
In, drive current source I1 driving current and non-constant value, as shown in figure 3, but when drive cycle starts, first export slightly more
Driving current, after continuing for some time, the size of driving current is adjusted according to the voltage on sampling resistor RCS.
After a suitable time, it is necessary to be charged to power supply capacitor Cvcc (i.e. in Fig. 3 after t1), now unlatching charging is all
Phase, drive current source I1 are stopped power supply, and power switch S1 is closed, while power switch S2 is open-minded, now, although ambipolar three
Pole pipe Q1 does not have base current (by drive current source I1), but due to ambipolar triode Q1 smearing, its current collection
Impedance between pole and emitter stage is still relatively low, and collector current continues to rise, and emitter current is flowed into by power switch S2
Power supply capacitor Cvcc, and realize the charging to power supply capacitor Cvcc.
After the t2 times, power supply capacitor Cvcc charging complete, now, closing switch S3 are open-minded so that power bipolar
Triode Q1 base stage is by quick pull-down to ground, power bipolar triode Q1 also quick closedowns, one charge cycle of completion.
After charge cycle terminates, closing switch S3, which is opened, continues conducting a period of time, completes whole drive cycle, then,
Power switch S1 is taken the lead in being opened, and power switch S2 and closing switch S3 are closed simultaneously, and then opens new drive cycle.
Wherein, in each drive cycle, the summation of t1 times and t2 times can be determined by control circuit 100, control
Circuit 100 obtains the current information in transformer T1 by sample circuit 200, when it reaches internal reference value, makes ambipolar
Triode Q1 quick closedowns, so as to control the peak point current of double pole triode Q1 colelctor electrode.And the t1 times can be by powering
Electric capacity Cvcc voltage dynamic regulations, when electric capacity Cvcc undertensions, power switch S1 conducting is reduced by control control circuit 100
Time, to reduce the ratio of t1 times, when power supply capacitor Cvcc voltages are higher, power switch is increased by control control circuit 100
S1 ON time, to increase the ratio of t1 times.It is possible thereby to the supply current for being just met for demand is set to flow into power supply capacitor
Cvcc。
The embodiment of the present invention stops supplying for double pole triode by when charge cycle starts, closing drive current source
Electricity, then, by closing power switch and turning on power switch, to drive the electric current in double pole triode to be filled for power supply capacitor
Electricity, when power supply capacitor charging reaches preset requirement, double pole triode is closed by turning on closing switch, terminates power supply electricity
Capacity charge, and the power supply capacitor voluntarily to charge is realized, extra supplementary power can be provided for double pole triode, and then eliminate auxiliary
The design of winding is helped, reduces peripheral circuit, saves system cost, additionally provides safe and reliable power bipolar triode driving
Mode.
Embodiment two
The embodiments of the invention provide a kind of switching power circuit, and referring to Fig. 4, the switching power circuit includes：Embodiment
Double pole triode drive circuit described in one.
Referring to Fig. 4, the switching power circuit also includes：The rectifier bridge of input ac voltage, it is connected to rectification bridge output end
Bus capacitor C1, start resistance Rst.
It should be noted that double pole triode drive circuit is largely integrated into driving chip (chip in Fig. 4
Pin include：VCC, C, FB, CS, VSS etc.) suffer, those skilled in the art can be completed with conjunction with the embodiments one and Fig. 2
The design of whole switching power circuit, here not in repeat specification.
In the present embodiment, the topological classification of powered-down source circuit can be flyback topology, buck topology and lifting
Any one of die mould topology, the i.e. type of drive of double pole triode drive circuit can apply to flyback topology, and voltage-dropping type is opened up
Flutter and buck-boost type topology in.
The embodiment of the present invention stops supplying for double pole triode by when charge cycle starts, closing drive current source
Electricity, then, by closing power switch and turning on power switch, to drive the electric current in double pole triode to be filled for power supply capacitor
Electricity, when power supply capacitor charging reaches preset requirement, double pole triode is closed by turning on closing switch, terminates power supply electricity
Capacity charge, and the power supply capacitor voluntarily to charge is realized, extra supplementary power can be provided for double pole triode, and then eliminate auxiliary
The design of winding is helped, reduces peripheral circuit, saves system cost, additionally provides safe and reliable power bipolar triode driving
Mode.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (9)
- A kind of 1. self-powered double pole triode drive circuit, it is characterised in that including：Double pole triode (Q1), power Switch (S1), transformer (T1), drive current source (I1), the power supply capacitor for providing power supply for drive current source (I1) (Cvcc), power switch (S2) and closing switch (S3),When each charge cycle starts, stop being the double pole triode (Q1) by closing the drive current source (I1) Power supply, by closing power switch (S1) and turning on the power switch (S2), to drive in the double pole triode (Q1) Electric current be the power supply capacitor (Cvcc) charging；When the power supply capacitor (Cvcc) charging reaches preset requirement, closed by turning on the closing switch (S3) described Double pole triode (Q1), terminate the power supply capacitor (Cvcc) charging.
- 2. double pole triode drive circuit according to claim 1, it is characterised in that the double pole triode (Q1) Colelctor electrode and the transformer (T1) electrical connection, the emitter stage of the double pole triode (Q1) opens with the power respectively Close the drain electrode of (S1) and one end electrical connection of the power switch (S2), the other end and the power supply of the power switch (S2) The positive pole electrical connection of electric capacity (Cvcc), the positive pole of the power supply capacitor (Cvcc) also electrically connect with the drive current source (I1), The negative pole of the power supply capacitor (Cvcc) electrically connects with the source electrode of the power switch (S1), the double pole triode (Q1) The one end of base stage respectively with the drive current source (I1) and the closing switch (S3) electrically connects, the closing switch (S3) The other end is grounded.
- 3. double pole triode drive circuit according to claim 1, it is characterised in that also include：Sampling resistor (RCS), control circuit (100), sample circuit (200),The sample circuit (200) is used for the sample information obtained from the sampling resistor (RCS),The control circuit (100) is used for the sample information provided according to the sample circuit (200), by default SECO institute State the unlatching of drive current source (I1), the power switch (S1), the power switch (S2) and the closing switch (S3) Or close.
- 4. double pole triode drive circuit according to claim 3, it is characterised in that the control control circuit (100) It is additionally operable to, according to the information of voltage in the power supply capacitor (Cvcc), adjust the power switch (S1) ON time.
- 5. double pole triode drive circuit according to claim 3, it is characterised in that the sampling resistor (RCS) One end electrically connects with the source electrode of the power switch (S1) and the negative pole of the power supply capacitor (Cvcc) respectively, the sampling resistor (RCS) the other end electrically connects with the sample circuit (200), the control circuit (100) respectively with the sample circuit (200), the grid of the power switch (S1), the drive current source (I1), the power switch (S2) and the closing Switch (S3) electrical connection.
- 6. double pole triode drive circuit according to claim 3, it is characterised in that the drive current source (I1) exists When drive cycle starts, the driving current of the non-definite value of excess is first provided, after continuing expeced time, according to the sampling resistor (RCS) voltage on provides into the driving current of preset ratio relation.
- 7. double pole triode drive circuit according to claim 1, it is characterised in that the power switch (S1) is electricity Press the low N-type FET of grade.
- 8. a kind of switching power circuit, it is characterised in that including the double pole triode driving described in claim any one of 1-7 Circuit.
- 9. switching power circuit according to claim 8, it is characterised in that the topological classification of the switching power circuit is Any one of flyback topology, buck topology and buck-boost type topology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710774136.1A CN107482932A (en) | 2017-08-31 | 2017-08-31 | A kind of self-powered double pole triode drive circuit and switching power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710774136.1A CN107482932A (en) | 2017-08-31 | 2017-08-31 | A kind of self-powered double pole triode drive circuit and switching power circuit |
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| CN107482932A true CN107482932A (en) | 2017-12-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710774136.1A Pending CN107482932A (en) | 2017-08-31 | 2017-08-31 | A kind of self-powered double pole triode drive circuit and switching power circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462378A (en) * | 2018-03-15 | 2018-08-28 | 深圳市芯茂微电子有限公司 | A kind of adaptive BJT driving circuits |
| CN108599561A (en) * | 2018-06-04 | 2018-09-28 | 武汉上水微电子科技有限公司 | A method of carrying out chip power power supply using triode storage time |
| CN116755655A (en) * | 2023-08-21 | 2023-09-15 | 深圳市芯茂微电子有限公司 | Multiplication and division arithmetic unit |
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| CN205249037U (en) * | 2015-09-11 | 2016-05-18 | 深圳欧创芯半导体有限公司 | Switch triode from supply circuit , LED drive module and integrated circuit |
| CN106059279A (en) * | 2016-06-22 | 2016-10-26 | 成都启臣微电子股份有限公司 | Switching power supply quick starting and VDD self-power supply circuit |
| CN206432888U (en) * | 2016-11-22 | 2017-08-22 | 上海晶丰明源半导体股份有限公司 | Power supply circuit, Switching Power Supply control chip and switch power supply system |
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2017
- 2017-08-31 CN CN201710774136.1A patent/CN107482932A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205249037U (en) * | 2015-09-11 | 2016-05-18 | 深圳欧创芯半导体有限公司 | Switch triode from supply circuit , LED drive module and integrated circuit |
| CN106059279A (en) * | 2016-06-22 | 2016-10-26 | 成都启臣微电子股份有限公司 | Switching power supply quick starting and VDD self-power supply circuit |
| CN206432888U (en) * | 2016-11-22 | 2017-08-22 | 上海晶丰明源半导体股份有限公司 | Power supply circuit, Switching Power Supply control chip and switch power supply system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462378A (en) * | 2018-03-15 | 2018-08-28 | 深圳市芯茂微电子有限公司 | A kind of adaptive BJT driving circuits |
| CN108599561A (en) * | 2018-06-04 | 2018-09-28 | 武汉上水微电子科技有限公司 | A method of carrying out chip power power supply using triode storage time |
| CN116755655A (en) * | 2023-08-21 | 2023-09-15 | 深圳市芯茂微电子有限公司 | Multiplication and division arithmetic unit |
| CN116755655B (en) * | 2023-08-21 | 2023-10-17 | 深圳市芯茂微电子有限公司 | Multiplication and division arithmetic unit |
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Inventor after: Zhao Xin Inventor after: Zong Qiang Inventor after: Guan Lei Inventor after: Yin Zhong Inventor before: Zong Qiang Inventor before: Guan Lei Inventor before: Yin Zhong |
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Application publication date: 20171215 |
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