CN204406258U - A kind of current source circuit based on Switching Power Supply - Google Patents
A kind of current source circuit based on Switching Power Supply Download PDFInfo
- Publication number
- CN204406258U CN204406258U CN201520106416.1U CN201520106416U CN204406258U CN 204406258 U CN204406258 U CN 204406258U CN 201520106416 U CN201520106416 U CN 201520106416U CN 204406258 U CN204406258 U CN 204406258U
- Authority
- CN
- China
- Prior art keywords
- power supply
- switching power
- unit
- pin
- acquisition unit
- 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.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of current source circuit based on Switching Power Supply, comprise switching power supply, current acquisition unit, conversion and feedback unit and load unit; Described switching power supply is connected with feedback unit with converting with current acquisition unit respectively, and the feedback voltage that switching power supply receiving conversion and feedback unit export also exports adjustable voltage; Described current acquisition unit and switching power supply, convert and be connected with feedback unit, load unit, load unit electric current is converted to voltage by current acquisition unit; Conversion is connected with feedback unit and switching power supply, current acquisition unit, and conversion and feedback unit accept the output voltage of current acquisition unit and feed back to the adjustment that switching power supply carries out switching power supply output voltage.The utility model adopts Switching Power Supply to realize current source circuit, improves the efficiency of current source and significantly reduces heating, improve comprehensive benefit.
Description
Technical field
The utility model relates to a kind of current source, especially a kind of current source circuit based on Switching Power Supply.
Background technology
Current source is basic element circuit, is used widely in electric equipment products.The structure species of current source is various, but in the structure of the overwhelming majority, the current source be mostly based on linear circuit of employing, this is because the circuit material of this respect comparatively easily obtains.But, the current source of linear circuit structure also also exists some and compares the problem being easy to be ignored by people, and these problems are little at electrical quantity, can't cause special problem when power is faint, once in big current and the application of high-power demand, problem will be outstanding all the more.This problem is exactly efficiency, and because efficiency is unevident, and bring heating serious, serious heating can cause again the too early inefficacy of a lot of thermo-responsive components and parts.
Utility model content
In view of this, the purpose of this utility model is the current source of linear circuit, and during work, not high, the serious deficiency of generating heat of efficiency, provides a kind of current source circuit based on Switching Power Supply, adopts switching power supply to solve above-mentioned efficiency and heating problem.
For achieving the above object, the utility model by the following technical solutions:
Based on a current source circuit for Switching Power Supply, wherein, switching power supply, current acquisition unit, conversion and feedback unit and load unit is comprised; Described switching power supply is connected with feedback unit with converting with current acquisition unit respectively, and the feedback voltage that switching power supply receiving conversion and feedback unit export also exports adjustable voltage; Described current acquisition unit and switching power supply, convert and be connected with feedback unit, load unit, load unit electric current is converted to voltage by current acquisition unit; Conversion is connected with feedback unit and switching power supply, current acquisition unit, and conversion and feedback unit accept the output voltage of current acquisition unit and feed back to the adjustment that switching power supply carries out switching power supply output voltage.
As preferably, described switching power supply comprises input electrochemical capacitor Cin, switch power module chip U1, schottky diode D1, commutation inductance L1 and exports electrochemical capacitor Cout; 35V input direct voltage is connected with the Vin pin of switch power module chip U1 with the positive pole of input electrochemical capacitor Cin respectively; The negative pole of input electrochemical capacitor Cin, the GND pin of switch power module chip U1 are connected the ground of power supply with OFF pin, the OUTPUT pin of switch power module chip U1 is connected with one end of commutation inductance L1 with the negative electrode of schottky diode D1 respectively, the other end of commutation inductance L1 is connected with current acquisition unit with the positive pole exporting electrochemical capacitor Cout respectively, and the anode of schottky diode D1 and the negative pole of output electrochemical capacitor Cout are connected to the ground; Switch power module chip U1 adopts LM2576HV-ADJ.
As preferably, described current acquisition unit comprises resistance R1 and amplifier U2; The two ends of resistance R1 connect+IN and the-IN pin of amplifier U2 respectively, + IN the pin of amplifier U2 connects the positive pole and commutation inductance L1 that export electrochemical capacitor Cout, 35V input voltage is connected with the Vs pin of amplifier U2, and the GND pin of amplifier U2 is connected with the ground of power supply; The OUT pin of amplifier U2 is connected with the FB pin of switch power module chip U1;-IN the pin of described amplifier U2 is connected load unit with resistance R1.
As preferably, the amplifier U2 of described current acquisition unit adopts AD8219.
As preferably, described load unit is RL, and load unit RL one end connects-IN pin and the resistance R1 of amplifier U2, and the other end connects the ground of power supply.
Described conversion and this circuit of feedback unit adopt the output of current acquisition unit FB pin that is direct and U1 to carry out feedback form.
The beneficial effect of utility model is: the utility model comprises switching power supply, current acquisition unit, conversion and feedback unit and load unit four part, solve the current source of existing linear circuit, the not enough problem that during work, the not high heating of efficiency is serious, switching power supply is adopted to realize current source circuit, improve the efficiency of current source and significantly reduce heating, improve comprehensive benefit simultaneously.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, the utility model comprises switching power supply 001, current acquisition unit 002, conversion and feedback unit 003 and load unit 004; Described switching power supply 001 is connected with feedback unit 003 with converting with current acquisition unit 002 respectively, and the feedback voltage that switching power supply 001 receiving conversion and feedback unit 003 export also exports adjustable voltage; Described current acquisition unit 002 and switching power supply 001, convert and be connected with feedback unit 003, load unit 004, load unit 004 electric current is converted to voltage 002 by current acquisition unit 002; Conversion is connected with feedback unit 003 and switching power supply 001, current acquisition unit 002, and conversion and feedback unit 003 accept the output voltage of current acquisition unit 002 and feed back to the adjustment that switching power supply 001 carries out switching power supply output voltage.
The utility model by switching power supply 001, current acquisition unit 002, conversion and feedback unit 003 and load unit 004 respective handling after, effectively raise the efficiency of current source and save energy consumption.
As shown in Figure 2, switching power supply comprises input electrochemical capacitor Cin, switch power module chip U1, schottky diode D1, commutation inductance L1 and exports electrochemical capacitor Cout.Annexation is: 35V input direct voltage is connected with the Vin pin of switch power module chip U1 with the positive pole of input electrochemical capacitor Cin respectively; The negative pole of input electrochemical capacitor Cin, the GND pin of switch power module chip U1 are connected the ground of power supply with OFF pin, the OUTPUT pin of switch power module chip U1 is connected with one end of commutation inductance L1 with the negative electrode of schottky diode D1 respectively, the other end of commutation inductance L1 is connected with current acquisition unit with the positive pole exporting electrochemical capacitor Cout respectively, and the anode of schottky diode D1 and the negative pole of output electrochemical capacitor Cout are connected to the ground; Switch power module chip U1 adopts LM2576HV-ADJ.
Current acquisition unit comprises resistance R1 and amplifier U2; The two ends of resistance R1 connect+IN and the-IN pin of amplifier U2 respectively, + IN the pin of amplifier U2 connects the positive pole and commutation inductance L1 that export electrochemical capacitor Cout, 35V input voltage is connected with the Vs pin of amplifier U2, and the GND pin of amplifier U2 is connected with the ground of power supply; The OUT pin of amplifier U2 is connected with the FB pin of switch power module chip U1;-IN the pin of described amplifier U2 is connected load unit with resistance R1.
The amplifier U2 of current acquisition unit adopts AD8219.Load unit is RL, and load unit RL one end connects-IN pin and the resistance R1 of amplifier U2, and the other end connects the ground of power supply.
Under the effect of the switching power source chip LM2576HV-ADJ of switching power supply 001, produce output voltage and flow through load RL through RL, now can flow through the electric current of RL by generation current, this electric current and the electric current flowing through load RL are same electric currents.If this electric current is less than arrange electric current, the amplifier U2 output voltage of current acquisition unit 002 will be less than normal setting voltage, impel the switching power source chip LM2576HV-ADJ of switching power supply 001 to produce larger output voltage after feedback, impel the electric current flowing through RL to increase to some extent; If this electric current is greater than arrange electric current, the amplifier U2 output voltage of current acquisition unit 002 will be greater than normal setting voltage, impel the switching power source chip LM2576HV-ADJ of switching power supply 001 to produce less output voltage after feedback, impel the electric current flowing through RL to reduce to some extent.Until reach setting electric current, thus, realize the effect of dynamic constant current.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, other amendments that those skilled in the art make the technical solution of the utility model or equivalently to replace, only otherwise depart from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of right of the present utility model.
Claims (5)
1. based on a current source circuit for Switching Power Supply, it is characterized in that: comprise switching power supply, current acquisition unit, conversion and feedback unit and load unit; Described switching power supply is connected with feedback unit with converting with current acquisition unit respectively, and the feedback voltage that switching power supply receiving conversion and feedback unit export also exports adjustable voltage; Described current acquisition unit and switching power supply, convert and be connected with feedback unit, load unit, load unit electric current is converted to voltage by current acquisition unit; Conversion is connected with feedback unit and switching power supply, current acquisition unit, and conversion and feedback unit accept the output voltage of current acquisition unit and feed back to the adjustment that switching power supply carries out switching power supply output voltage.
2. a kind of current source circuit based on Switching Power Supply according to claim 1, is characterized in that: described switching power supply comprises input electrochemical capacitor Cin, switch power module chip U1, schottky diode D1, commutation inductance L1 and exports electrochemical capacitor Cout; 35V input direct voltage is connected with the Vin pin of switch power module chip U1 with the positive pole of input electrochemical capacitor Cin respectively; The negative pole of input electrochemical capacitor Cin, the GND pin of switch power module chip U1 are connected the ground of power supply with OFF pin, the OUTPUT pin of switch power module chip U1 is connected with one end of commutation inductance L1 with the negative electrode of schottky diode D1 respectively, the other end of commutation inductance L1 is connected with current acquisition unit with the positive pole exporting electrochemical capacitor Cout respectively, and the anode of schottky diode D1 and the negative pole of output electrochemical capacitor Cout are connected to the ground; Switch power module chip U1 adopts LM2576HV-ADJ.
3. a kind of current source circuit based on Switching Power Supply according to claim 2, is characterized in that: described current acquisition unit comprises resistance R1 and amplifier U2; The two ends of resistance R1 connect+IN and the-IN pin of amplifier U2 respectively, + IN the pin of amplifier U2 connects the positive pole and commutation inductance L1 that export electrochemical capacitor Cout, 35V input voltage is connected with the Vs pin of amplifier U2, and the GND pin of amplifier U2 is connected with the ground of power supply; The OUT pin of amplifier U2 is connected with the FB pin of switch power module chip U1;-IN the pin of described amplifier U2 is connected load unit with resistance R1.
4. a kind of current source circuit based on Switching Power Supply according to claim 3, is characterized in that: the amplifier U2 of described current acquisition unit adopts AD8219.
5. a kind of current source circuit based on Switching Power Supply according to claim 4, is characterized in that: described load unit is RL, and load unit RL one end connects-IN pin and the resistance R1 of amplifier U2, and the other end connects the ground of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520106416.1U CN204406258U (en) | 2015-02-14 | 2015-02-14 | A kind of current source circuit based on Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520106416.1U CN204406258U (en) | 2015-02-14 | 2015-02-14 | A kind of current source circuit based on Switching Power Supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204406258U true CN204406258U (en) | 2015-06-17 |
Family
ID=53430102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520106416.1U Expired - Fee Related CN204406258U (en) | 2015-02-14 | 2015-02-14 | A kind of current source circuit based on Switching Power Supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204406258U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696938A (en) * | 2017-10-21 | 2019-04-30 | 国神光电科技（上海）有限公司 | A kind of electronic device and control method for current source control |
| CN110031123A (en) * | 2018-01-04 | 2019-07-19 | 联发科技股份有限公司 | Heat sensor integrated circuit and resistor for heat sensor |
| CN110635691A (en) * | 2019-08-29 | 2019-12-31 | 合肥博雷电气有限公司 | Current source module |
-
2015
- 2015-02-14 CN CN201520106416.1U patent/CN204406258U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696938A (en) * | 2017-10-21 | 2019-04-30 | 国神光电科技（上海）有限公司 | A kind of electronic device and control method for current source control |
| CN109696938B (en) * | 2017-10-21 | 2023-11-03 | 国神光电科技（上海）有限公司 | Electronic device for current source control and control method |
| CN110031123A (en) * | 2018-01-04 | 2019-07-19 | 联发科技股份有限公司 | Heat sensor integrated circuit and resistor for heat sensor |
| CN110635691A (en) * | 2019-08-29 | 2019-12-31 | 合肥博雷电气有限公司 | Current source module |
| CN110635691B (en) * | 2019-08-29 | 2021-06-29 | 合肥博雷电气有限公司 | Current source module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204406258U (en) | A kind of current source circuit based on Switching Power Supply | |
| CN204696914U (en) | A kind of novel B oost converter | |
| CN205490142U (en) | Switched inductor boost converter | |
| CN205195559U (en) | Novel DC -DC converter steps up | |
| CN109510463A (en) | The continuous buck DC-DC converter of input and output electric current | |
| CN204948016U (en) | A kind of photovoltaic power generation apparatus adopting zero voltage switch auxiliary resonance | |
| CN204947919U (en) | A kind of parallel resonance no-voltage photovoltaic power generation apparatus | |
| CN204696953U (en) | A kind of Z-source inverter being applicable to photovoltaic generation | |
| CN205336107U (en) | Crisscross parallelly connected soft switch circuit of boost | |
| CN204705931U (en) | Wide region is adjustable linear stabilized power supply | |
| CN204215302U (en) | Online integrated high precision constant current source | |
| CN209030117U (en) | A kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach | |
| CN203167360U (en) | High efficiency environmental protection LED high voltage linear constant current driving circuit | |
| CN201594746U (en) | Series-output-based electric energy feedback type electronic load | |
| CN203151827U (en) | Ultra-long-life large-current light emitting diode (LED) drive power circuit | |
| CN202282641U (en) | Power supply circuit for high-frequency ignition of integrated stove | |
| CN205304642U (en) | Invariable pulse current's device is provided for load | |
| CN202889194U (en) | Solar controller | |
| CN202889193U (en) | A switching power supply with multiple outputs and a sampling feedback device thereof | |
| CN202607048U (en) | Control module of electric welding machine | |
| CN204290455U (en) | The fast charger of a kind of novel constant-temperature | |
| CN109494979A (en) | A kind of step-up dc-dc converter | |
| CN204190688U (en) | DC/DC translation circuit in a kind of solar photovoltaic generation system | |
| CN203180772U (en) | Converter used for photovoltaic power generation system | |
| CN204615684U (en) | The power module of three-phase alternating current input and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |