CN204423218U - A kind of current controller - Google Patents
A kind of current controller Download PDFInfo
- Publication number
- CN204423218U CN204423218U CN201420836462.2U CN201420836462U CN204423218U CN 204423218 U CN204423218 U CN 204423218U CN 201420836462 U CN201420836462 U CN 201420836462U CN 204423218 U CN204423218 U CN 204423218U
- Authority
- CN
- China
- Prior art keywords
- nmos
- correctional tube
- current
- current controller
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Current controller of the present utility model comprises current-limiting resistance, for controlling the output current limiting value of product; Negative feedback loop, for stable prod output end voltage value, is particularly useful for high voltage stabilizing.Whole main circuit will adopt single chip integrated LDO control chip, NMOS Correctional tube, makes output voltage stabilization in the voltage stabilizing value of setting, simultaneously by the setting then of inner high-accuracy current-limiting point, especially can realize voltage stabilizing during high-power output by backfeed loop.The utility model adopts advanced microwave assembly technology, realizes that volume is little, rapid heat dissipation, reliability are high, can fully meet high-quality power supply requirement.
Description
Technical field
The utility model relates to field of power supplies, particularly relates to a kind of current controller that can provide regulated output voltage when larger current exports.
Background technology
Since 19th-century electromagnetic induction phenomenon finds, various electric/electronic device has been deep into the every field of mankind's daily life, becomes the irreplaceable productive life instrument of people already, such as electric light, mobile phone, TV, motor etc.Any one electric/electronic device all needs Power supply.The normal table that quality of power supply directly affects electric/electronic device runs, and power supply quality is bad also easily causes security incident.Along with the raising of era development and people's quality of life, people require also more and more higher to quality of power supply, and accurate electric/electronic device is higher to power quality requirements.
Along with microelectric technique development, various semi-conductor chip plays indispensable effect in social life, as mobile phone, computer just have various chip.Because semi-conductor chip self character, the requirement of most of semi-conductor chip to power supply is exactly that electric current and voltage amount requires also little, but quality requirements is high.The a bit abnormal variation of electric current and voltage just may affect chip performance and even lose efficacy, so the special power supply supply that important semi-conductor chip or the module device that comprises chip must be good.If inside modules semi-conductor chip quantity is many or have power semiconductor device, then not only also must there be enough current/voltage deliverabilities to power quality requirements height.
Export the voltage stabilizer of big current extremely important in circuit, but and be not easy design, when adopting existing regulator design to provide large output current, voltage stabilizer uses high-precision current-limiting resistance usually, and the resistance of these current-limiting resistances is difficult to accurately setting.Simultaneously when producing product, also must easily debug resistance size.Current controller is as current limliting, voltage-stabilizing device, and output power may be larger, and when product is in cut-off current state continuous firing, the power consumption of interiors of products is comparatively large, product is generated heat obviously, therefore needs to carry out heat dissipation design to product.
therefore must solve in prior art and adopt controller in High-current output situation, realize the process of voltage stabilizing and heat radiation.
Big current controller needs large output current mainly for actual conditions, the requirement that output voltage is more stable simultaneously designs, output current scope is adjustable, different current needs can be met, be mainly used in the equipment that radio frequency T/R assembly, power amplifier, phased-array radar etc. include a large amount of semi-conductor chip.
Summary of the invention
In order to solve the deficiencies in the prior art, the concrete technical scheme of the utility model is as follows.
A kind of current controller, is characterized in that: comprise low pressure difference linear voltage regulator control chip, NMOS Correctional tube, feedback resistance R1, feedback resistance R2 and current-limiting resistance Rs.
Described low pressure difference linear voltage regulator control chip, NMOS Correctional tube, feedback resistance R1 and feedback resistance R2 form negative feedback loop, the EN pin of described low pressure difference linear voltage regulator control chip passes through resistance eutral grounding, VP pin meets Vcc, VDD pin meets Vin, G pin connects NMOS Correctional tube grid, and D pin connects the drain electrode of NMOS Correctional tube; Described NMOS Correctional tube source class meets Vout, and described NMOS Correctional tube source class is ground connection after serial Feedback resistance R1, feedback resistance R2 successively.
Described current-limiting resistance Rs is spun gold or the gold ribbon of the pressure welding in parallel of power input Vin and NMOS Correctional tube drain terminal.
Further, described NMOS Correctional tube is IRFZ44.
Again further, the indirect diode 1N4148 of described NMOS Correctional tube grid and source class.
Described low pressure difference linear voltage regulator control chip is MIC5156.
Again further, described feedback resistance R1 value is 5-10k Ω.
described current controller adopts copper cavity, and does substrate base with beryllia and carry out micro-assembling.
The bonding of described NMOS Correctional tube and beryllia substrate adopts metallic aluminum and aluminium wire bonding.
The beneficial effects of the utility model are: by arranging the resistance of high-accuracy current-limiting resistance, when realizing especially high-power output voltage export stable.The beryllia high by thermal conductivity does chip substrate, adopt the copper cavity that thermal conductivity is good simultaneously, adopt advanced microwave assembly technology, decrease volume to greatest extent, realize very fast heat radiation, it also avoid the reduction of gold-aluminium bonding intensity and there is the impact of failure risk on circuit integrity performance.
Accompanying drawing explanation
fig. 1 is current controller circuit structure diagram.
Embodiment
This instructions comprises arbitrary feature disclosed in any accessory claim, summary and accompanying drawing, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Below in conjunction with specific embodiments and the drawings, the utility model is described in further detail.
As shown in Figure 1, current controller is mainly divided into current-limiting circuit and output voltage stabilizing circuit two parts, current-limiting circuit part, comprises current-limiting resistance Rs and NMOS Correctional tube, and wherein current-limiting resistance Rs is spun gold or the gold ribbon of power input and NMOS Correctional tube drain terminal pressure welding in parallel.NMOS Correctional tube is preferably IRFZ44, the indirect diode 1N4148 of IRFZ44 grid and source class.The cut-off current that current controller exports is regulated by the current-limiting resistance Rs changed between Vin and NMOS tube drain terminal, now its resistance value is set as 2.25m Ω, the maximum voltage that low pressure difference linear voltage regulator (LDO) control chip MIC5156 limits on Rs reduces to 35mV, and the cut-off current of product and the relation of Rs are as shown in (1) formula:
（1）
Output current limiting value controls as 15.5A.
Output voltage stabilizing circuit is realized by the negative-feedback circuit loop of LDO control chip MIC5156, IRFZ44, feedback resistance R1, R2 composition.The EN pin of MIC5156 is by resistance eutral grounding, and VP pin meets Vcc, and VDD pin meets Vin, and G pin connects IRFZ44 grid, and D pin connects IRFZ44 drain electrode; IRFZ44 source class meets Vout, and IRFZ44 source class is connected ground connection after R1, R2 successively.
When the input voltage of current controller is higher than threshold voltage, threshold voltage and output voltage linear, be V
out-0.6V.Resistance R1, R2 adjust output voltage values, shown in (2):
（2）
Wherein 1.235V is interiors of products reference voltage, and for avoiding the electric current that divider resistance consumption is large, generally first set the larger divider resistance of a resistance, limiting R1 is herein 5-10k Ω.R1 determines, then the resistance value of R2 just can be determined by (2) formula, and R1 resistance is general coincide with institute's resistance of selling on market, convenient purchase.Divider resistance R1=9.1k Ω is selected, then R2=1.5k Ω in the present embodiment.
When input voltage is lower than threshold voltage 8%, LDO control chip MIC5156 internal control port will automatically shut down, and Vcc will provide grid end driving voltage for NMOS Correctional tube IRFZ44, and now output end voltage value is:
（3）
This linear relationship is that MIC5156 determines, now, typical input and output voltage reduces to:
。
The utility model current controller adopts copper cavity, and does substrate base with beryllia and carry out micro-assembling.Beryllia thermal conductivity is higher, big current path can help the heat on Correctional tube carry out fast dissipation, be burned to avoid NMOS tube temperature too high.Bonding due to NMOS tube and substrate adopts the bonding of spun gold and aluminium lamination, of long duration can slowly form golden aluminium compound, the intensity of gold-aluminium bonding is reduced greatly, in order to avoid the failure risk that may exist is on the impact of whole circuit performance, in the present embodiment, the bonding of NMOS tube IRFZ44 and beryllia substrate adopts metallic aluminum and aluminium wire bonding.
The utility model structure is simple, and apply advanced microwave assembly technology, volume is little, good heat dissipation effect, and reliability is high, is applicable to the exigent place of power volume.The utility model output power is large, and output voltage current stabilization, fully can meet the actual conditions of power supply requirement.
Claims (7)
1. a current controller, is characterized in that:
Comprise low pressure difference linear voltage regulator control chip, NMOS Correctional tube, feedback resistance R1, feedback resistance R2 and current-limiting resistance Rs;
Described low pressure difference linear voltage regulator control chip, NMOS Correctional tube, feedback resistance R1 and feedback resistance R2 form negative feedback loop, the EN pin of described low pressure difference linear voltage regulator control chip passes through resistance eutral grounding, VP pin meets Vcc, VDD pin meets Vin, G pin connects NMOS Correctional tube grid, and D pin connects the drain electrode of NMOS Correctional tube; Described NMOS Correctional tube source class meets Vout, and described NMOS Correctional tube source class is ground connection after serial Feedback resistance R1, feedback resistance R2 successively;
Described current-limiting resistance Rs is spun gold or the gold ribbon of the pressure welding in parallel of power input Vin and NMOS Correctional tube drain terminal.
2. current controller according to claim 1, is characterized in that, described NMOS Correctional tube is IRFZ44.
3. current controller according to claim 2, is characterized in that, the indirect diode 1N4148 of described NMOS Correctional tube grid and source class.
4. current controller according to claim 1, is characterized in that described low pressure difference linear voltage regulator control chip is MIC5156.
5., according to the arbitrary described current controller of claim 1-4, it is characterized in that, described feedback resistance R1 value is between 5-10k Ω.
6. current controller according to claim 5, is characterized in that described current controller adopts copper cavity, and does substrate base with beryllia and carry out micro-assembling.
7. current controller according to claim 6, its feature adopts metallic aluminum and aluminium wire bonding at the bonding of described NMOS Correctional tube and beryllia substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420836462.2U CN204423218U (en) | 2014-12-26 | 2014-12-26 | A kind of current controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420836462.2U CN204423218U (en) | 2014-12-26 | 2014-12-26 | A kind of current controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204423218U true CN204423218U (en) | 2015-06-24 |
Family
ID=53473568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420836462.2U Active CN204423218U (en) | 2014-12-26 | 2014-12-26 | A kind of current controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204423218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120908A1 (en) * | 2016-12-29 | 2018-07-05 | 珠海奥释科技有限公司 | Wireless voltage-stabilizing and current-limiting circuit for exercise bicycle that can generate electricity |
-
2014
- 2014-12-26 CN CN201420836462.2U patent/CN204423218U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120908A1 (en) * | 2016-12-29 | 2018-07-05 | 珠海奥释科技有限公司 | Wireless voltage-stabilizing and current-limiting circuit for exercise bicycle that can generate electricity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101727120B (en) | Linear voltage regulator circuit for rapidly responding to load change without plug-in capacitor | |
| US9198243B2 (en) | LED driver circuit for supplying TRIAC holding current by using controllable current source | |
| CN103595018B (en) | Over-voltage protecting circuit, LED backlight drive circuit and liquid crystal displayer | |
| CN103368051A (en) | Semiconductor laser driving system used for fiber laser pump | |
| CN103747561B (en) | Adjustment of load compensated switching power supply | |
| CN105554954A (en) | Control chip for LED (Light-Emitting Diode) driving | |
| US20220278618A1 (en) | Electronic cigarette chip with automatic closed-loop control for output voltage and working method thereof | |
| CN203645873U (en) | Load regulation compensating circuit based on quasi-resonance LED constant current switch power supply | |
| CN206595544U (en) | A kind of adjustable constant-flow semiconductor laser drive power | |
| CN204423218U (en) | A kind of current controller | |
| CN108430139B (en) | LED driving circuit with silicon controlled rectifier dimmer and control method thereof | |
| CN106329958B (en) | Line voltage compensation circuit | |
| JP2015122294A (en) | Controller for automatically detecting maximum operating current of light source and controlling method thereof | |
| CN203422694U (en) | TEC drive circuit | |
| CN205160397U (en) | High -pressure linear stabilized power supply of online integrated integration | |
| CN107425724B (en) | Flyback power supply preloading device | |
| CN201403226Y (en) | LED backlight driving device | |
| CN204145794U (en) | Current ripples eliminates integrated circuit, current source loads drive unit and lighting | |
| US9204515B2 (en) | Light source module, light source module driving circuit and driving method | |
| CN108345339A (en) | A kind of high-power constant-flow driver based on NEW TYPE OF COMPOSITE Darlington circuit topological structure | |
| CN104470095A (en) | Ripple rejection LED drive circuit | |
| CN204442775U (en) | A kind of controllable silicon light modulation LED drive circuit with compensating circuit | |
| CN105515357B (en) | A kind of DCDC current-limiting circuits | |
| CN103117659A (en) | Current closed-loop control circuit for series load resonant converter | |
| CN103440008B (en) | Self-adaptive load circuit with output voltage regulation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |