CN202094124U - AC-DC switching power supply and power triode thereof - Google Patents
AC-DC switching power supply and power triode thereof Download PDFInfo
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- CN202094124U CN202094124U CN2011202039686U CN201120203968U CN202094124U CN 202094124 U CN202094124 U CN 202094124U CN 2011202039686 U CN2011202039686 U CN 2011202039686U CN 201120203968 U CN201120203968 U CN 201120203968U CN 202094124 U CN202094124 U CN 202094124U
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Abstract
The utility model provides an AC-DC switching power supply and a power triode thereof. The power triode comprises a substrate serving as a collecting electrode, at least two isolated base regions formed on the substrate, and emitting electrodes respectively formed on the base regions, as well a collecting electrode pin electrically connected the substrate, at least two base electrode pins electrically connected with the base regions and at least two emitting electrode pins electrically connected with the emitting electrodes, wherein the substrate, each base region, the emitting electrode on each base region and the corresponding pin form a triode unit. The AC-DC switching power supply comprises a power management circuit and a switch tube electrically connected with the power management circuit, wherein the switch tube is provided with the above power triode structure. By adopting the utility model, the performance of the switching power supply can be ensured under the premise that the cost is controlled.
Description
Technical field
The utility model relates to the circuit structure of Switching Power Supply, and the circuit that relates in particular to switching tube in the AC-DC Switching Power Supply is realized.
Background technology
Along with the development of society, electrical equipment and each electronic product are more and more intelligent, and more environmental protection and power saving are safer.Need the power supply of all kinds of different voltages to supply with all kinds of control chips and circuit working in the electric equipment products, the source of electronic product power supply is exactly the high-voltage ac power on the socket, and all control circuits nearly all need the DC power supply or the battery-powered operation of low pressure, so the High Level AC Voltage that provides from electrical network is to all kinds of different LVPS of electronic product work requirements and charge the battery and all need the change-over circuit of an output from the alternating current to the low-voltage direct, both AC-DC power supplys, the most frequently used AC-DC power supply is a high frequency switch power at present.
The most basic AC-DC Switching Power Supply is the direct rectification of AC power, the output DC high-voltage power supply is to transformer work, transformer is by the variation of process control energy in transformer of opening and closing of HF switch pipe, thereby control output low-voltage dc power supply is for the control circuit work of follow-up each several part.
In the AC-DC Switching Power Supply, electric power management circuit, just control chip, be responsible for situations such as the input and output of power supply and temperature are sampled, error is amplified, FEEDBACK CONTROL, and the switching process of last control switch pipe is with the output-index of realization system requirements and the safe operation of control system.Wherein the index request of power-supply system has the output voltage size, precision, output current size and precision, the output voltage ripple size, conversion efficiency, stand-by power consumption, the insulation request that may need on electrical equipment is connected of output and input etc., and the scope that can adapt to the voltage of input, EMI index etc.The control of secure context comprises the overvoltage/undervoltage protection of input and output voltage, the overheat protector of system, short-circuit protection of output or the like.
In real work, electric power management circuit and peripheral system coordination work thereof are to open and close the conversion of controlling power supply energy by the control switch pipe.Switching tube is the executor of Switching Power Supply work, and electric power management circuit is the effector, the main body that peripheral transformer and other magnetic element and capacitive element etc. then constitute power conversion.So electric power management circuit and switching tube are inalienable parts in the Switching Power Supply conversion: some Switching Power Supply management circuit and switching tube are done together, some be by with relatively independent combination of devices to working together.
The performance of switching tube has direct influence to the difficulty or ease of control and the last performance of system.Device as switching tube in the Switching Power Supply of middle low power mainly contains metal-oxide-semiconductor and triode.The device that is used as switching tube in high power switching power supply is mainly metal-oxide-semiconductor, IGBT, IPM module etc.
At the Switching Power Supply range of application at middle low power, metal-oxide-semiconductor and triode are each has something to recommend him.The advantage of triode is the withstand voltage height of doing easily, and this fail safe to the work of AC-DC Switching Power Supply is extremely important.Along with the globalization of producing, the operating voltage of electric equipment products requires more and more wideer, require to adapt to the electrical network in the whole world, wherein have two problem demand sides right: one is the specification difference of electrical network itself, AC110V is arranged, AC240V, even have that requirement all can operate as normal from AC85V to AC380V to the voltage range of input.Another is the power grid quality problem, and the power grid quality of some backward areas is on duty mutually, and the AC supply voltage deviation ratio of supply can reach more than 2 times of standard value.Therefore, increasing product requirement has very wide input service voltage range, thus to the withstand voltage index request of switching tube just than higher.Compare with metal-oxide-semiconductor, the withstand voltage easier height of doing of triode adds that the cost of triode is lower, and in the application scenario of special requirement high pressure, triode has very big advantage.The shortcoming of triode mainly comprises: owing to be current drives work, need bigger operating current during work, start difficulty, need big starting current and longer system start-up time; The bigger loss that brings because of the bigger drive current of needs; Drive complicated, because of the multiplication factor of triode has discreteness, so control relatively difficulty of suitable drive current, if drive too big, can enter dark saturation conduction state during conducting, and the dark bigger operating current of driven saturated demand, can reduce the switching frequency of triode simultaneously, the control precision that can influence switching tube increases the switching loss of triode simultaneously, if and driving is not enough, system may enter the linear work district, and the switching tube conducting is incomplete, very big power consumption can be produced, and switching tube may be burnt; Be not suitable for high-current switch.
Existing AC-DC Switching Power Supply, in order to satisfy the requirement under the above-mentioned various situation, often need be equipped with two at electric power management circuit is provided with plural triode and realizes the control of corresponding switch, this does not singly increase the number of components and parts, directly increase Material Cost and PCB space, also can make system risk increase owing to the otherness of each device itself.
As seen, be necessary the switching tube structure of existing triode type is improved in fact, giving full play under the withstand voltage situation of doing high advantage easily of triode, can overcome defectives such as the triode drive current is big, driving complexity, and it is on a wafer that two or more triodes are integrated, with under the prerequisite of controlling cost, the satisfied collocation with electric power management circuit satisfied the relevant requirements of AC-DC Switching Power Supply jointly.
The utility model content
The technical problems to be solved in the utility model is to overcome the deficiency that above-mentioned prior art exists, and proposes a kind of AC-DC Switching Power Supply and pliotron structure thereof, can guarantee the performance of Switching Power Supply under the prerequisite of controlling cost.
The technical scheme that the utility model proposes at above-mentioned technical problem comprises, a kind of pliotron of AC-DC Switching Power Supply is proposed, comprise a substrate as collector electrode, at least two bases of the mutual isolation that on this substrate, forms, an emitter that on each base, forms and the collector electrode pin that is electrically connected with this substrate, at least two base stage pins that are electrically connected with those bases, at least two emitter pins that are electrically connected with those emitters, this substrate, each base, emitter on each base and corresponding pin constitute a triode unit.
The current capacity of those triode unit has two kinds of specifications at least.
The voltage endurance capability of those triode unit all is not less than a set point.
This substrate is the N type semiconductor material, and those bases are P type semiconductor materials, and those emitters are N type semiconductor materials.
This substrate is the P type semiconductor material, and those bases are N type semiconductor materials, and those emitters are P type semiconductor materials.
The technical scheme that the utility model proposes at above-mentioned technical problem also comprises, put forward a kind of AC-DC Switching Power Supply, comprise separately electric power management circuit independently and the switching tube that is electrically connected with this electric power management circuit, this switching tube has above-mentioned pliotron structure.
In a preferred embodiment of the present utility model, one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, and another in those triode unit is controlled by this electric power management circuit and does to start and use.
In another preferred embodiment of the present utility model, one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, and another in those triode unit is controlled by this electric power management circuit and makees main switch and use with the driving saturation control of unit.
In another preferred embodiment of the present utility model, one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, and another in those triode unit is controlled by this electric power management circuit and makees main switch and use with the prime driving of unit.
In another preferred embodiment of the present utility model, one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, in those triode unit another is controlled by this electric power management circuit and does startup usefulness, and another in those triode unit is controlled by this electric power management circuit and makees main switch and use with the prime driving of unit.
Compared with prior art, AC-DC Switching Power Supply of the present utility model and pliotron thereof, triode unit by integrated at least two common collectors of while in an encapsulation, make the switching tube of triode type can realize driving flexibly and control, thereby can under the prerequisite of controlling cost, guarantee the performance of Switching Power Supply.
Description of drawings
Fig. 1 is the structural representation of pliotron embodiment of the present utility model.
Fig. 2 is the equivalent electric principle schematic of pliotron embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is given elaboration further.
As shown in Figure 1, the structure of the pliotron embodiment of the AC-DC of being applicable to Switching Power Supply of the present utility model roughly comprises: a substrate 1 as collector electrode, first of the mutual isolation that on this substrate 1, forms, the second two bases 2,4, this first, the second two bases 2, form respectively separately on 4 first, the second two emitters 3,5 and the collector electrode pin C that is electrically connected with this substrate 1, the first base stage pin B1 that is electrically connected with this first base 2, the first emitter pin E1 that is electrically connected with this first emitter 3, second base stage pin B2 that is electrically connected with this second base 4 and the second emitter pin E2 that is electrically connected with this second emitter 5.Substrate 1, first base 2, first emitter 3 and corresponding pin C, B1, E1 constitute a first module.Substrate 1, second base 4, second emitter 5 and corresponding pin C, B2, E2 constitute Unit one second.The current capacity that first module has is greater than the current capacity of this Unit second, and the voltage endurance capability that first module has roughly is equal to the voltage endurance capability of this Unit second.
Consider, the NPN triode is to be combined by two N type semiconductors and a P type semiconductor, P type semiconductor is in the middle of two N type semiconductor materials, form back-to-back two PN junctions with two N type semiconductors respectively, the electrode of trilaminate material is extracted, just realized the performance of triode between these three electrodes, such structure has just formed the NPN triode.Because the parameter of the parameter of triode and trilaminate material and geometry manufacturing process etc. are relevant, under all identical situation of other parameters, the current capacity of triode and the area of section of its PN junction are directly proportional, therefore, can be designed to the area of section of the area of section of this first base 2 greater than second base 4, the area of section of first emitter region 3 is greater than the area of section of second emitter region 5.
On C utmost point substrate, only make a base than routine as doing the pliotron that switching tube uses in the Switching Power Supply, reach and on the base, only make an emitter region, form a collector electrode at last, an emitter, a base stage, and audion of the present utility model, the triode that forms has a public collector electrode, two or more base stages and the emitter of paired mutual isolation, form the triode unit of two or more common collectors, different according to the area that base stage and emitter are shared, different triodes has different current capacities, but all has roughly the same withstand voltage index, that is to say, the voltage endurance capability of each triode unit is all above a set point, to satisfy the needs of practical application.
Need to prove that for the transistor parameter that needing to obtain, wherein the parameter of layers of material comprises the concentration of physics, the thickness of mutual cladding material and size all are controlled.The pad of the extraction electrode in the actual product, passivation protection layer, the protective layer of substrate and cross structures such as layer and do not embody.
Pliotron structure of the present utility model can be encapsulation separately, also can encapsulate in the lump with electric power management circuit.Pliotron structure of the present utility model, its pin be meant that the metal lead wire that is connected with it that produces in the PAD of wafer and the encapsulation process and encapsulation back form device with its pin of Electricity Federation mutually.
As shown in Figure 2, be the isoboles of NPN type pliotron of the present utility model.It can be used as switching tube in the AC-DC Switching Power Supply, arrange in pairs or groups mutually, drive flexibly and control realizing with electric power management circuit, such as: by startup usefulness is done in Unit second of little electric current, the first module of big electric current is done main switch usefulness, can save starting current; The driving saturation control usefulness of the first module by Unit second of little electric current being done big electric current can make the drive current of triode accurately control; Carry out switch control by classification, can reduce the demand of drive current, can improve system effectiveness.
Need to prove, though the above embodiments structure has just been mentioned the situation that constructs two triode unit on same collector electrode, but the utility model is as limit, can construct three, four and the triode unit of more number more on same collector electrode.For example, can be on same collector electrode, to construct three triode unit (scheming not shown), one in these three triode unit is controlled by this electric power management circuit and does main switch usefulness, another is controlled by this electric power management circuit and does startup usefulness, and another is controlled by this electric power management circuit and makees main switch and use with the prime driving of unit.
Foregoing; it only is preferred embodiment of the present utility model; be not to be used to limit embodiment of the present utility model; those of ordinary skills are according to main design of the present utility model and spirit; protection range of the present utility model can carry out corresponding flexible or modification very easily, so should be as the criterion with the desired protection range of claims.
Claims (10)
1. the pliotron of an AC-DC Switching Power Supply, it is characterized in that, comprise a substrate as collector electrode, in at least two bases of the mutual isolation that forms on this substrate, the emitter that on each base, forms and the collector electrode pin that is electrically connected with this substrate, at least two base stage pins that are electrically connected with those bases, at least two emitter pins being electrically connected with those emitters, emitter on this substrate, each base, each base and corresponding pin constitute a triode unit.
2. according to the described pliotron of claim 1, it is characterized in that the current capacity of those triode unit has two kinds of specifications at least.
3. according to the described pliotron of claim 1, it is characterized in that the voltage endurance capability of those triode unit all is not less than a set point.
4. according to the described pliotron of claim 1, it is characterized in that this substrate is the N type semiconductor material, those bases are P type semiconductor materials, and those emitters are N type semiconductor materials.
5. according to the described pliotron of claim 1, it is characterized in that this substrate is the P type semiconductor material, those bases are N type semiconductor materials, and those emitters are P type semiconductor materials.
6. an AC-DC Switching Power Supply comprises an electric power management circuit and the switching tube that is electrically connected with this electric power management circuit, it is characterized in that, this switching tube has by each described pliotron structure of claim 1 to 5.
7. according to the described AC-DC Switching Power Supply of claim 6, it is characterized in that one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, another in those triode unit is controlled by this electric power management circuit and does to start and use.
8. according to the described AC-DC Switching Power Supply of claim 6, it is characterized in that, one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, and another in those triode unit is controlled by this electric power management circuit and makees main switch and use with the driving saturation control of unit.
9. according to the described AC-DC Switching Power Supply of claim 6, it is characterized in that, one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, and another in those triode unit is controlled by this electric power management circuit and makees main switch and use with the prime driving of unit.
10. according to the described AC-DC Switching Power Supply of claim 6, it is characterized in that, one in those triode unit is controlled by this electric power management circuit and does main switch usefulness, in those triode unit another is controlled by this electric power management circuit and does startup usefulness, and another in those triode unit is controlled by this electric power management circuit and makees main switch and use with the prime driving of unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202039686U CN202094124U (en) | 2011-06-16 | 2011-06-16 | AC-DC switching power supply and power triode thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202039686U CN202094124U (en) | 2011-06-16 | 2011-06-16 | AC-DC switching power supply and power triode thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202094124U true CN202094124U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202039686U Expired - Lifetime CN202094124U (en) | 2011-06-16 | 2011-06-16 | AC-DC switching power supply and power triode thereof |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222670A (en) * | 2011-06-16 | 2011-10-19 | 深圳市力生美半导体器件有限公司 | AC-DC (alternating current-direct current) switching power supply and power triode thereof |
-
2011
- 2011-06-16 CN CN2011202039686U patent/CN202094124U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222670A (en) * | 2011-06-16 | 2011-10-19 | 深圳市力生美半导体器件有限公司 | AC-DC (alternating current-direct current) switching power supply and power triode thereof |
| WO2012171342A1 (en) * | 2011-06-16 | 2012-12-20 | 深圳市力生美半导体器件有限公司 | Ac-dc switch power supply and power triode thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518000, Shenzhen, Guangdong Province, Nanshan District science and technology road, 1, SED science and technology building on the south side of the 10 floor, block A Patentee after: SHENZHEN LII SEMICONDUCTOR CO., LTD. Address before: Longgang District of Shenzhen City, Guangdong province 518000 Longgang Street Baolong community Jinlong Avenue 2 refined ingot technology industrial plant building No. 1 201~202 Patentee before: Shenzhen Lishengmei Semiconductor Deveces Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |