CN112751477A - Switching power supply for conducting voltage method and rectification method - Google Patents
Switching power supply for conducting voltage method and rectification method Download PDFInfo
- Publication number
- CN112751477A CN112751477A CN202011589152.1A CN202011589152A CN112751477A CN 112751477 A CN112751477 A CN 112751477A CN 202011589152 A CN202011589152 A CN 202011589152A CN 112751477 A CN112751477 A CN 112751477A
- Authority
- CN
- China
- Prior art keywords
- resistor
- capacitor
- power supply
- tps54360
- inductor
- 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.)
- Pending
Links
Images
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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Dc-Dc Converters (AREA)
Abstract
A switching power supply for a voltage conduction method and an adjustment and modification method solve the problems of complex peripheral circuit and high cost of the conventional switching power supply for the voltage conduction method, and belong to the field of EMC (electro magnetic compatibility) testing of automobile instrument technologies. The invention relates to a switch power supply, which cancels a plurality of filter circuits at the front stage on the basis of the existing switch power supply, saves the cost, and carries out rectification and modification aiming at the rear stage of the switch power supply, thereby saving the cost, and the rectification and modification method comprises the following steps: s1, changing the value of the resistance RT according to the specific standard exceeding frequency point to enable the standard exceeding frequency point to avoid the standard exceeding position; s2, calculating the value of the inductor LO according to the magnitude of the output current, so that the inductor LO allows the output current to work in an unsaturated state; s3, selecting an electrolytic capacitor with low ESR value and good ripple characteristic by the capacitor COUT, wherein the parameter value is larger than the parameters given in the recommended circuit manual. And S4, the leakage current of the Schottky diode D is as small as possible under the condition that the current is ensured to meet the requirement.
Description
Technical Field
The invention relates to a switching power supply for a conduction voltage method and an adjustment and modification method, belonging to the field of EMC (electro magnetic compatibility) testing of automobile instrument technologies.
Background
With the development of information technology, the automobile combination meter needs to use devices with higher working frequency, so that more and more interference is generated, the problem of EMC test is increased, especially the use of the switching power supply leads to the most difficult conduction voltage method test related to the switching power supply to pass.
The prior application technology has the following defects:
1 the peripheral circuit is complex and the manufacturability is poor.
The 2 front stage input power supply filter devices are excessive, and the cost is increased.
Disclosure of Invention
Aiming at the problems of complexity and high cost of the peripheral circuit of the conventional switching power supply for the conduction voltage method, the invention provides the switching power supply for the conduction voltage method and the rectification method, which are cost-saving and optimally designed.
The switching power supply comprises a voltage stabilizing chip TPS54360, a capacitor CIN, a resistor RUVLO1, a resistor RUVLO2, a resistor RT, a capacitor CBOOT, an inductor LO, a capacitor COUT, a capacitor CHF, a resistor RCOMP, a capacitor CCOMP, a resistor RHS, a resistor RLS and a Schottky diode D;
one end of a capacitor CIN, one end of a resistor RUVLO1 and the VIN end of a voltage stabilizing chip TPS54360 are simultaneously connected with the positive electrode of the input power supply, and the other end of the capacitor CIN and one end of a resistor RUVLO2 are simultaneously connected with the negative electrode of the input power supply; the other end of the resistor RUVLO1 is connected with the other end of the resistor RUVLO2 and the EN end of the voltage stabilizing chip TPS54360 at the same time;
one end of the resistor RT is connected with the RT/CLK end of the voltage stabilizing chip 7PS57360,
one end of the capacitor CBOOT is connected with the BOOT end of the voltage stabilizing chip 7PS57360, and the other end of the capacitor CBOOT is simultaneously connected with one end of the inductor LO and the cathode of the Schottky diode D; the other end of the inductor LO, one end of the capacitor COUT and one end of the resistor RHS are connected at the same time, and the anode of the Schottky diode D and the other end of the capacitor COUT are connected with the cathode of the input power supply at the same time;
the other end of the resistor RHS and one end of the resistor RLS are simultaneously connected with the FB end of the voltage stabilizing chip TPS 54360;
the COMP end of the voltage stabilizing chip TPS54360, one end of the capacitor CHF and one end of the resistor RCOMP are connected at the same time;
the other end of the resistor RCOMP is connected with one end of the capacitor CCOMP;
the other end of the resistor RT, the PAD end of the voltage stabilization chip TPS54360, the GND end of the voltage stabilization chip TPS54360, the other end of the capacitor CHF, the other end of the capacitor CCOMP and the other end of the resistor RLS are simultaneously connected with the negative electrode of the input power supply.
Preferably, the method comprises:
and S1, changing the value of the resistance RT according to the specific standard exceeding frequency point to ensure that the standard exceeding frequency point avoids the standard exceeding position.
Preferably, the method further comprises:
and S2, calculating the value of the inductor LO according to the size of the output current, so that the inductor LO allows the output current to work in an unsaturated state.
Preferably, the method further comprises:
s3, selecting an electrolytic capacitor with low ESR value and good ripple characteristic by the capacitor COUT, wherein the parameter value is larger than the parameters given in the recommended circuit manual.
Preferably, the method further comprises:
and S4, the leakage current of the Schottky diode D is as small as possible under the condition that the current is ensured to meet the requirement.
The invention has the beneficial effects that the invention provides an improved method and a scheme in the conducted emission test project of EMI, and the risk can be avoided at the early stage of design. The invention adopts a design idea of combining principle design and actual test links to meet the test standards and requirements. The invention changes the fixed parameter collocation of the output link in the traditional power circuit design, adjusts the parameters according to the load circuit in the actual use process, analyzes each output device one by one and selects the optimal matching scheme. The invention cancels a plurality of filter circuits at the front stage, saves the cost and optimizes the production manufacturability. The invention optimizes the circuit design of the switching power supply and accurately positions in the testing link. Shortening the project cycle.
Drawings
FIG. 1 is a schematic diagram of a switching power supply according to the present invention;
FIG. 2 is a performance diagram of a switching power supply before rectification;
fig. 3 is a performance diagram of a switching power supply modified by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1, the switching power supply of this embodiment includes a voltage stabilizing chip TPS54360, a capacitor CIN, a resistor RUVLO1, a resistor RUVLO2, a resistor RT, a capacitor CBOOT, an inductor LO, a capacitor COUT, a capacitor CHF, a resistor RCOMP, a capacitor CCOMP, a resistor RHS, a resistor RLS, and a schottky diode D;
one end of a capacitor CIN, one end of a resistor RUVLO1 and the VIN end of a voltage stabilizing chip TPS54360 are simultaneously connected with the positive electrode of the input power supply, and the other end of the capacitor CIN and one end of a resistor RUVLO2 are simultaneously connected with the negative electrode of the input power supply; the other end of the resistor RUVLO1 is connected with the other end of the resistor RUVLO2 and the EN end of the voltage stabilizing chip TPS54360 at the same time;
one end of the resistor RT is connected with the RT/CLK end of the voltage stabilizing chip TPS54360,
one end of a capacitor CBOOT is connected with the BOOT end of the voltage stabilizing chip TPS54360, and the other end of the capacitor CBOOT is simultaneously connected with one end of an inductor LO and the cathode of the Schottky diode D; the other end of the inductor LO, one end of the capacitor COUT and one end of the resistor RHS are connected at the same time, and the anode of the Schottky diode D and the other end of the capacitor COUT are connected with the cathode of the input power supply at the same time;
the other end of the resistor RHS and one end of the resistor RLS are simultaneously connected with the FB end of the voltage stabilizing chip TPS 54360;
the COMP end of the voltage stabilizing chip TPS54360, one end of the capacitor CHF and one end of the resistor RCOMP are connected at the same time;
the other end of the resistor RCOMP is connected with one end of the capacitor CCOMP;
the other end of the resistor RT, the PAD end of the voltage stabilization chip TPS54360, the GND end of the voltage stabilization chip TPS54360, the other end of the capacitor CHF, the other end of the capacitor CCOMP and the other end of the resistor RLS are simultaneously connected with the negative electrode of the input power supply.
Compared with the existing switching power supply, the embodiment eliminates a plurality of pre-stage filter circuits, saves cost and optimizes production manufacturability. The embodiment makes rectification and modification aiming at the rear stage of the switching power supply, saves cost, and the rectification and modification method comprises the following steps:
s1, changing the value of the resistance RT according to the specific standard exceeding frequency point to enable the standard exceeding frequency point to avoid the standard exceeding position;
s2, calculating the value of the inductor LO according to the magnitude of the output current, so that the inductor LO allows the output current to work in an unsaturated state; the value of the inductor LO does not have a linear relation with the output current, and the required current is obtained by adjusting the value of the inductor LO to adjust the magnitude of the output current.
S3, selecting an electrolytic capacitor with low ESR value and good ripple characteristic by the capacitor COUT, wherein the parameter value is larger than the parameters given in the recommended circuit manual.
The circuit manual recommended in this embodiment defines parameters of each device in the switching power supply, but cannot meet the performance requirements of the switching power supply.
And S4, the leakage current of the Schottky diode D is as small as possible under the condition that the current is ensured to meet the requirement.
As shown in fig. 2 and fig. 3, when the performance of the switching power supply is judged, iii and iv are respectively limit values, i and ii are performance values of the switching power supply, and the principle that the switching power supply has good performance is that the peak value of i is lower than iv, and the peak value of ii is lower than iii. The performance of the switching power supply of the embodiment after the modification is obviously better than that before the modification.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (5)
1. A switching power supply for conducting voltage is characterized by comprising a voltage stabilizing chip TPS54360, a capacitor CIN, a resistor RUVLO1, a resistor RUVLO2, a resistor RT, a capacitor CBOOT, an inductor LO, a capacitor COUT, a capacitor CHF, a resistor RCOMP, a capacitor CCOMP, a resistor RHS, a resistor RLS and a Schottky diode D;
one end of a capacitor CIN, one end of a resistor RUVLO1 and the VIN end of a voltage stabilizing chip TPS54360 are simultaneously connected with the positive electrode of the input power supply, and the other end of the capacitor CIN and one end of a resistor RUVLO2 are simultaneously connected with the negative electrode of the input power supply; the other end of the resistor RUVLO1 is connected with the other end of the resistor RUVLO2 and the EN end of the voltage stabilizing chip TPS54360 at the same time;
one end of the resistor RT is connected with the RT/CLK end of the voltage stabilizing chip TPS54360,
one end of a capacitor CBOOT is connected with the BOOT end of the voltage stabilizing chip TPS54360, and the other end of the capacitor CBOOT is simultaneously connected with one end of an inductor LO and the cathode of the Schottky diode D; the other end of the inductor LO, one end of the capacitor COUT and one end of the resistor RHS are connected at the same time, and the anode of the Schottky diode D and the other end of the capacitor COUT are connected with the cathode of the input power supply at the same time;
the other end of the resistor RHS and one end of the resistor RLS are simultaneously connected with the FB end of the voltage stabilizing chip TPS 54360;
the COMP end of the voltage stabilizing chip TPS5430, one end of the capacitor CHF and one end of the resistor RCOMP are connected at the same time;
the other end of the resistor RCOMP is connected with one end of the capacitor CCOMP;
the other end of the resistor RT, the PAD end of the voltage stabilization chip TPS54360, the GND end of the voltage stabilization chip TPS54360, the other end of the capacitor CHF, the other end of the capacitor CCOMP and the other end of the resistor RLS are simultaneously connected with the negative electrode of the input power supply.
2. A method of rectifying a switching power supply according to claim 1, characterized in that the method comprises:
and S1, changing the value of the resistance RT according to the specific standard exceeding frequency point to ensure that the standard exceeding frequency point avoids the standard exceeding position.
3. The method of grooming in accordance with claim 2, wherein the method further comprises:
and S2, calculating the value of the inductor LO according to the size of the output current, so that the inductor LO allows the output current to work in an unsaturated state.
4. The finishing method according to claim 3, characterized in that the method further comprises:
s3, selecting an electrolytic capacitor with low ESR value and good ripple characteristic by the capacitor COUT, wherein the parameter value is larger than the parameters given in the recommended circuit manual.
5. The method of grooming in accordance with claim 4, characterized in that the method further comprises:
and S4, the leakage current of the Schottky diode D is as small as possible under the condition that the current is ensured to meet the requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011589152.1A CN112751477A (en) | 2020-12-28 | 2020-12-28 | Switching power supply for conducting voltage method and rectification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011589152.1A CN112751477A (en) | 2020-12-28 | 2020-12-28 | Switching power supply for conducting voltage method and rectification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112751477A true CN112751477A (en) | 2021-05-04 |
Family
ID=75646529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011589152.1A Pending CN112751477A (en) | 2020-12-28 | 2020-12-28 | Switching power supply for conducting voltage method and rectification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112751477A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231319A (en) * | 2008-02-21 | 2008-07-30 | 中兴通讯股份有限公司 | Electromagnetic interference scanning device and method |
| CN103488839A (en) * | 2013-09-27 | 2014-01-01 | 中国东方电气集团有限公司 | Method for modeling transient state conducted emission of power line of electric car |
| CN208656633U (en) * | 2018-03-26 | 2019-03-26 | 四川长虹精密电子科技有限公司 | Switching Power Supply output filter circuit |
-
2020
- 2020-12-28 CN CN202011589152.1A patent/CN112751477A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231319A (en) * | 2008-02-21 | 2008-07-30 | 中兴通讯股份有限公司 | Electromagnetic interference scanning device and method |
| CN103488839A (en) * | 2013-09-27 | 2014-01-01 | 中国东方电气集团有限公司 | Method for modeling transient state conducted emission of power line of electric car |
| CN208656633U (en) * | 2018-03-26 | 2019-03-26 | 四川长虹精密电子科技有限公司 | Switching Power Supply output filter circuit |
Non-Patent Citations (1)
| Title |
|---|
| TEXAS INSTRUMENTS: ""具有Eco-Mode的TPS54360 60V输入、3.5A、降压直流/直流转换器"", 《"具有ECO-MODE的TPS54360 60V输入、3.5A、降压直流/直流转换器"》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3494813A1 (en) | Electronic cigarette drive circuit and electronic cigarette | |
| US20090219006A1 (en) | Electric power converter | |
| US10264635B2 (en) | Ripple suppression circuit and light emitting diode driver | |
| US20180183429A1 (en) | Integrated series schottky diode rectifier | |
| CN109217697A (en) | Synchronous bridge rectifier, the operating method and its component of synchronous bridge rectifier | |
| CN112751477A (en) | Switching power supply for conducting voltage method and rectification method | |
| CN219535883U (en) | Power factor correction circuit and lamp | |
| US11147139B2 (en) | Device for driving LED and method for driving LED | |
| CN207965722U (en) | The control circuit of PFC busbar voltages | |
| CN115833630A (en) | Valley filling circuit and control method thereof | |
| CN211792163U (en) | Load drive circuit and load drive control circuit | |
| CN111083838A (en) | Boost following control circuit and LED driving power supply | |
| CN108319355A (en) | A kind of Buck framework power supply circuits improving power supply light-load efficiency | |
| CN210005944U (en) | linear voltage-reducing and voltage-stabilizing circuit suitable for internal power supply of DC-DC circuit | |
| CN107295718B (en) | Balanced synchronous driving circuit for realizing high-power LED illumination | |
| CN111917314A (en) | Electrolytic capacitor-free high-efficiency converter for inhibiting power ripples and working method thereof | |
| CN219394696U (en) | Boost type power supply circuit and PCB | |
| CN105576947A (en) | Switching power supply controller and switching power supply employing the same | |
| CN204272424U (en) | Meet the small-power BUCK circuit LED drive power of electromagnetic compatibility | |
| CN220874421U (en) | Active power factor correction circuit and switching power supply | |
| CN217335434U (en) | Automatic switching circuit for voltage reduction and power supply of automobile power supply | |
| TWM539699U (en) | Rectifier device integrating cascaded Schottky diodes | |
| CN219678328U (en) | Non-isolated power supply circuit and lamp | |
| CN214799006U (en) | Power supply secondary supply line replacing transformer auxiliary winding | |
| CN216117771U (en) | AC input voltage detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210504 |