CN110798066A - Low ripple numerical control boosting power supply - Google Patents
Low ripple numerical control boosting power supply Download PDFInfo
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- CN110798066A CN110798066A CN201910956344.2A CN201910956344A CN110798066A CN 110798066 A CN110798066 A CN 110798066A CN 201910956344 A CN201910956344 A CN 201910956344A CN 110798066 A CN110798066 A CN 110798066A
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- China
- Prior art keywords
- push
- pull circuit
- boost converter
- pwm signal
- circuit
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- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a low-ripple numerical control boosting power supply which comprises a single chip microcomputer, a push-pull circuit, an inverse push-pull circuit, a first BOOST converter, a second BOOST converter and a sampling circuit, wherein the single chip microcomputer outputs a first PWM signal and a second PWM signal respectively, the first PWM signal and the second PWM signal have equal frequency, and the sum of duty ratios is 1; the first PWM signal is input into a push-pull circuit, the second PWM signal is input into an inverted push-pull circuit, the push-pull circuit and the inverted push-pull circuit respectively generate control signals with opposite phases and the same duty ratio, the control signal of the push-pull circuit controls a first BOOST converter, and the control signal of the inverted push-pull circuit controls a second BOOST converter; the output ends of the first BOOST converter and the second BOOST converter are connected in parallel and then are used as the output of the boosting power supply; the sampling circuit collects output voltage and feeds the output voltage back to the singlechip to form closed-loop control; the circuit has the advantages of small current ripple, high conversion efficiency of the converter and faster dynamic response when the load changes.
Description
Technical Field
The invention relates to the technical field of switching power supplies, in particular to a low-ripple numerical control boosting power supply.
Background
The switching power supply is an important branch of the power supply field, and plays an important role in high-power supply application. The traditional switch power supply is mostly an analog switch power supply, is simple and easy to use, but has poor expansibility and cannot quickly and accurately adjust parameters. In addition, the switching tube has a low response speed, which causes problems such as large power consumption loss, large heat generation, and difficulty in controlling ripples.
Disclosure of Invention
The invention aims to provide a low-ripple numerical control boosting power supply which is high in conversion efficiency, quick in dynamic response when a load changes and easy to control ripples.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a low-ripple numerical control boosting power supply comprises a single chip microcomputer, a push-pull circuit, an inverse push-pull circuit, a first BOOST converter, a second BOOST converter and a sampling circuit, wherein the single chip microcomputer outputs a first PWM signal and a second PWM signal respectively, the first PWM signal and the second PWM signal have equal frequency, and the sum of duty ratios is 1; the first PWM signal is input into a push-pull circuit, the second PWM signal is input into an inverted push-pull circuit, the push-pull circuit and the inverted push-pull circuit respectively generate control signals with opposite phases and the same duty ratio, the control signal of the push-pull circuit controls a first BOOST converter, and the control signal of the inverted push-pull circuit controls a second BOOST converter; the output ends of the first BOOST converter and the second BOOST converter are connected in parallel and then are used as the output of the boosting power supply; the sampling circuit collects output voltage and feeds the output voltage back to the singlechip to form closed-loop control.
The invention has the advantages that the push-pull circuit and the reverse push-pull circuit respectively generate control signals with opposite phases and the same duty ratio, so that the current ripple is very small, a single BOOST converter generates less heat, the conversion efficiency is high, and the dynamic response is faster when the load changes.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is an electrical schematic block diagram of the present invention;
fig. 2 is a schematic circuit diagram of the push-pull circuit, the reverse push-pull circuit, two BOOST converters and the sampling circuit of the present invention.
Detailed Description
As shown in fig. 1, the invention provides a low-ripple digital control BOOST power supply, which comprises a single chip microcomputer 1, a push-pull circuit 2, an inverse push-pull circuit 3, a first BOOST converter 4, a second BOOST converter 5 and a sampling circuit 6, wherein the single chip microcomputer 1 respectively outputs a first PWM signal and a second PWM signal, the first PWM signal and the second PWM signal have the same frequency, and the sum of duty ratios is 1; a first PWM signal is input into a push-pull circuit 2, a second PWM signal is input into an inverted push-pull circuit 3, the push-pull circuit 2 and the inverted push-pull circuit 3 respectively generate control signals with opposite phases and the same duty ratio, the control signal of the push-pull circuit 2 controls a first BOOST converter 4, and the control signal of the inverted push-pull circuit 3 controls a second BOOST converter 5; the output ends of the first BOOST converter 4 and the second BOOST converter 5 are connected in parallel and then are used as the output of the BOOST power supply; the sampling circuit 6 collects the output voltage and feeds the output voltage back to the singlechip 1 to form closed-loop control.
More specifically, as shown in fig. 2, the push-pull circuit 2 is composed of resistors R1, R2 connected to each other and transistors Q1, Q3, and the reverse push-pull circuit 3 is composed of resistors R5, R6 connected to each other and transistors Q4, Q6; the first BOOST converter 4 comprises an inductor L1, a diode D1, resistors R3 and R4 and a MOS transistor Q2 which are connected with each other, and the second BOOST converter 5 comprises an inductor L2, a diode D2, resistors R7 and R8 and a MOS transistor Q5 which are connected with each other; the first BOOST converter 4 and the second BOOST converter 5 share the same power source VCC, and output ends thereof are connected in parallel and then output a voltage V0 through a capacitor C1 to provide power for a load RL. The sampling circuit comprises resistors R9 and R10 which are connected in series, and the output voltage VO is divided by the resistors R9 and R10 and fed back to the single chip microcomputer 1 through the voltage follower N1.
When the first PWM signal is at a high level, the transistor Q1 is turned on, the transistor Q3 is turned off, and a high level is output, so that the MOS transistor Q2 is turned on, and a current flows from VCC to the MOS transistor Q2 and GND through the inductor L1; when the first PWM signal is at a low level, the transistor Q3 is turned on, the transistor Q1 is turned off, and a low level is output, so that the MOS transistor Q2 is turned off, and a current flows from VCC to the diode D1 through the inductor L1, and is output from the capacitor C1.
When the second PWM signal is at a high level, the transistor Q6 is turned on, the transistor Q4 is turned off, and a low level is output, so that the MOS transistor Q5 is turned off, and a current flows from VCC to the diode D2 through the inductor L2, and is output from the capacitor C1; when the second PWM is at low level, the transistor Q4 is turned on, the transistor Q6 is turned off, and a high level is output, so that the MOS transistor Q5 is turned on, and current flows from VCC to the MOS transistor Q5 and GND through the inductor L2.
The two BOOST converters output alternately, the output current is continuous, and the input current ripple is small. In addition, the pull-down resistors R3, R4, R7 and R8 can enable the parasitic capacitance Cgs of the MOS transistor to discharge rapidly, and further reduce power consumption; due to the adoption of the double BOOST converters, the heating and the loss of a single converter can be reduced inevitably, and the power conversion is improved.
The purpose of the voltage division of the sampling circuit is to attenuate the output voltage so as to realize level matching with the input interface of the singlechip 1, further read the output sampling voltage, and quickly respond to stabilize the output voltage.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.
Claims (1)
1. A low-ripple numerical control boosting power supply is characterized by comprising a single chip microcomputer, a push-pull circuit, an inverse push-pull circuit, a first BOOST converter, a second BOOST converter and a sampling circuit, wherein the single chip microcomputer outputs a first PWM signal and a second PWM signal respectively, the first PWM signal and the second PWM signal have the same frequency, and the sum of duty ratios is 1; the first PWM signal is input into a push-pull circuit, the second PWM signal is input into an inverted push-pull circuit, the push-pull circuit and the inverted push-pull circuit respectively generate control signals with opposite phases and the same duty ratio, the control signal of the push-pull circuit controls a first BOOST converter, and the control signal of the inverted push-pull circuit controls a second BOOST converter; the output ends of the first BOOST converter and the second BOOST converter are connected in parallel and then are used as the output of the boosting power supply; the sampling circuit collects output voltage and feeds the output voltage back to the singlechip to form closed-loop control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956344.2A CN110798066A (en) | 2019-10-10 | 2019-10-10 | Low ripple numerical control boosting power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956344.2A CN110798066A (en) | 2019-10-10 | 2019-10-10 | Low ripple numerical control boosting power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110798066A true CN110798066A (en) | 2020-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910956344.2A Pending CN110798066A (en) | 2019-10-10 | 2019-10-10 | Low ripple numerical control boosting power supply |
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| CN (1) | CN110798066A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10164750A (en) * | 1996-11-26 | 1998-06-19 | Nec Corp | Output voltage varying system |
| JPH10243640A (en) * | 1997-02-25 | 1998-09-11 | Funai Electric Co Ltd | Step-up chopper type switching power supply |
| JP2007195282A (en) * | 2006-01-17 | 2007-08-02 | Renesas Technology Corp | Power unit |
| CN103151923A (en) * | 2013-03-28 | 2013-06-12 | 北京经纬恒润科技有限公司 | Voltage stabilizer |
-
2019
- 2019-10-10 CN CN201910956344.2A patent/CN110798066A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10164750A (en) * | 1996-11-26 | 1998-06-19 | Nec Corp | Output voltage varying system |
| JPH10243640A (en) * | 1997-02-25 | 1998-09-11 | Funai Electric Co Ltd | Step-up chopper type switching power supply |
| JP2007195282A (en) * | 2006-01-17 | 2007-08-02 | Renesas Technology Corp | Power unit |
| CN103151923A (en) * | 2013-03-28 | 2013-06-12 | 北京经纬恒润科技有限公司 | Voltage stabilizer |
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Application publication date: 20200214 |
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| RJ01 | Rejection of invention patent application after publication |