CN209375460U - A kind of DC-DC converter system - Google Patents
A kind of DC-DC converter system Download PDFInfo
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- CN209375460U CN209375460U CN201920003791.1U CN201920003791U CN209375460U CN 209375460 U CN209375460 U CN 209375460U CN 201920003791 U CN201920003791 U CN 201920003791U CN 209375460 U CN209375460 U CN 209375460U
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Abstract
The utility model belongs to power technique fields more particularly to a kind of DC-DC converter system, including system power supply input terminal, auxiliary power circuit, BOOST circuit, voltage and current sample circuit, control circuit and man-machine interactive system；Auxiliary power circuit input terminal connects system power supply input terminal, and output end is feeder ear.The system output ripple is smaller; input voltage 15-21V is realized by BOOST circuit and software PID control, output voltage 30-36V high-precision, the adjustable Switching Power Supply of stepping have voltage regulation factor less than 0.2%; load regulation is less than 0.1%; DC-DC converter efficiency 93%, output ripple 300mV, 2A overcurrent protection; self- recoverage; circuit simple and stable, small in size, the features such as human-computer interaction is good.
Description
Technical field
The utility model belongs to power technique fields more particularly to a kind of DC-DC converter system.
Background technique
DC-DC converter is a kind of a kind of circuit topology that DC voltage is converted to another DC voltage.Generally exist
Low power occasion uses two kinds of topologys of Buck (buck) and Boost (boost type).But it is then adopted in the very big occasion of power more
With flyback, half-bridge, recommend or the circuit topology of full-bridge.There are isolated form and non-isolation type, isolated form transformer according to structure division
It will input and carry out electrical isolation with output, energy is transmitted to output end by magnetic energy, and non-isolation type transformer is exactly to pass through
Switching tube directly changes.
DC-DC converter is widely used in all kinds of at present: electric power, communication, industrial equipment, military vehicle-mounted, ambulance,
The fields such as police car, ship, solar energy, satellite communication equipment and wind power generation, in industry in occupation of extremely important status,
The quality of DC-DC converter directly affects the working condition of electric appliance.And today's society energy-saving and emission-reduction, synergy of guaranteeing the quality, section
Learn development, there is an urgent need to DC-DC converter technologies to play a role in more and more fields for the actual requirement of sustainable development.Cause
This, is highly desirable to develop a kind of DC-DC converter power supply device, to adapt to the power demands of different occasions.People occupy at present
The application of DC-DC converter can be seen in the electric appliance that family's life uses everywhere, but the DC-DC that electric appliance uses on the market at present becomes
Parallel operation output is second-rate, be easy to cause violent de-stabilising effect, and carrying load ability is poor, output ripple is larger, to electricity consumption
The service life of device has tremendous influence.
Utility model content
It is able to achieve that high quality DC-DC transformation, high-efficient, noise is small, it is each to have the purpose of the utility model is to provide one kind
Class protection and self-recovering function, strong flexibility, the positive DC-DC converting power source of the good middle low power of human-computer interaction.
A kind of DC-DC converter system that in order to achieve the above purposes, the technical solution adopted by the utility model is:, including be
System energization input, auxiliary power circuit, BOOST circuit, voltage and current sample circuit, control circuit and man-machine interactive system；
Auxiliary power circuit input terminal connects system power supply input terminal, and output end is feeder ear；BOOST circuit input end connects system and supplies
Electrical input, output end connect voltage and current sample circuit；Voltage and current sample circuit output end connects the defeated of control circuit
Enter end；The output end of control circuit is connect with the control terminal of BOOST circuit；Man-machine interactive system is connected with control circuit.
In above-mentioned DC-DC converter system, system power supply input terminal is 15-21V DC voltage.
In above-mentioned DC-DC converter system, auxiliary power circuit includes the first, second buck converter TPS5430
It is converted to the 15-18V DC voltage of low-voltage-drop linear voltage regulator LM1117, input by the first buck converter TPS5430
9V DC voltage；Second buck converter TPS5430 connection 9V DC voltage, and 9V DC voltage is converted into 5V direct current
Pressure；Low-voltage-drop linear voltage regulator LM1117 connection 5V DC voltage, and 5V DC voltage is converted into 3.3V DC voltage.
In above-mentioned DC-DC converter system, BOOST circuit includes the first electrolytic capacitor, the second electrolytic capacitor, tile
Capacitor, freewheeling diode, switching tube and inductance, the first electrolytic capacitor are connect with inductance one end, and the inductance other end is separately connected continuous
Flow the drain electrode of diode cathode and switching tube, the source electrode ground connection of switching tube；Freewheeling diode cathode connects the second electrolytic capacitor, the
Two electrolytic capacitors are in parallel with ceramic disc capacitor；Freewheeling diode selects two SR360A, and 60V is in parallel, and switching tube selects CSD19536,
Inductance selection is using 77254A7 as magnetic core coiling inductance.
In above-mentioned DC-DC converter system, voltage and current sample circuit includes voltage sample part and current sample
Part；Voltage sample part includes emitter follower, RC filter circuit and the converter of operational amplifier OPA118 composition
ADS1118；The emitter follower of operational amplifier OPA118 composition is separately connected RC filter circuit and converter ADS1118；
Current sample part includes constantan wire sampling resistor and voltage output current distributing monitor INA282, and constantan wire sampling resistor is logical
RC circuit connection is crossed in voltage output current distributing monitor INA282 input terminal, voltage output current distributing monitor INA282
Output end is connect with converter ADS1118, and the 5V DC voltage of auxiliary power circuit is operational amplifier OPA118 power supply；It is auxiliary
The 3.3V DC voltage for helping power circuit is that converter ADS1118 and voltage output current distributing monitor INA282 powers.
In above-mentioned DC-DC converter system, control circuit includes MSP430F6638 single-chip microcontroller and metal-oxide-semiconductor driving electricity
Road；MSP430F6638 single-chip microcontroller receives the data of voltage and current sample circuit and using PID pressure stabilizing algorithm to system by I/O port
Negative-feedback regu- lation is carried out, output control waveform PWM wave inputs metal-oxide-semiconductor driving circuit；Metal-oxide-semiconductor driving circuit uses driver
UCC27211, in its output end one 10 Europe resistance of series connection；The 9V DC voltage of auxiliary power circuit is driver UCC27211
Power supply；The 5V DC voltage of auxiliary power circuit is the power supply of MSP430F6638 single-chip microcontroller.
In above-mentioned DC-DC converter system, man-machine interactive system includes OLED display screen and 3*4 matrix-scanning key
Disk, OLED display screen are connected by SPI interface with MSP430F6638 single-chip microcontroller, 3*4 matrix-scanning keyboard with
MSP430F6638 single-chip I/O mouth is connected.
The utility model has the beneficial effects that the output ripple of the utility model is smaller, pass through BOOST circuit and software PID
Control realizes input voltage 15-21V, and output voltage 30-36V high-precision, the adjustable Switching Power Supply of stepping have voltage adjustment
Rate is less than 0.2%, and load regulation is less than 0.1%, DC-DC converter efficiency 93%, output ripple 300mV, 2A overcurrent protection,
The features such as self- recoverage, circuit simple and stable is small in size, and human-computer interaction is good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the BOOST circuit circuit diagram of the utility model embodiment；
Fig. 3 is that the utility model implements novel voltage and current sample circuit figure；
Fig. 4 is the electric operation control circuit figure of the utility model embodiment；
Fig. 5 is the man-machine interactive system circuit diagram of the utility model embodiment；
Fig. 6 is the auxiliary power circuit figure of the utility model embodiment；
Wherein, 1- system power supply input terminal, 2- auxiliary power circuit, 3-BOOST circuit, 4- voltage and current sample circuit,
5- control circuit, 6- man-machine interactive system, the second buck converter TPS5430 of the first buck converter of 21- TPS5430,22-,
The first electrolytic capacitor of 23- low-voltage-drop linear voltage regulator LM1117,31-, the second electrolytic capacitor of 32-, 33- ceramic disc capacitor, 34- afterflow
Diode, 35- switching tube, 36- inductance, emitter follower, the 42-AD converter of 41- operational amplifier OPA118 composition
ADS1118,43- constantan wire sampling resistor, 44- voltage output current distributing monitor INA282,51-PWM wave, 52- driver
The Europe UCC27211,53-10 resistance, 54-MSP430F6638 single-chip microcontroller, 62-3*4 matrix-scanning keyboard, 63-OLED display screen.
Specific embodiment
The embodiments of the present invention is described in detail with reference to the accompanying drawing.
As shown in Figure 1, the present embodiment is achieved through the following technical solutions, a kind of novel DC-DC converter system,
Including system power supply input terminal 1, auxiliary power circuit 2, BOOST circuit 3, voltage and current sample circuit 4, control circuit 5, man-machine
Interactive system 6；2 input terminal of auxiliary power circuit connects system power supply input terminal 1, and output end is separately connected the power supply of each chip
End；3 input terminal of BOOST circuit connects system power supply input terminal, and output end connects voltage and current sample circuit 4；Voltage and current
The input terminal of 4 output end of sample circuit connection control circuit 5；Output end output PWM wave and the BOOST circuit 3 of control circuit 5
Control terminal connection；Man-machine interactive system 6 is connected with control circuit 5.
As shown in Fig. 2, the metal-oxide-semiconductor in BOOST circuit 3 is controlled to export a stabilization by the PWM wave that single-chip microcontroller exports
The direct current signal of level.BOOST circuit input end filters low frequency with the first big electrolytic capacitor 31, and output end selects the second big electricity
Capacitor 32 and 33 mixed filtering of ceramic disc capacitor are solved, the second electrolytic capacitor 32 filters low frequency, and ceramic disc capacitor 33 filters high frequency to reduce output
Ripple；For the freewheeling diode 34 in BOOST circuit, because SR360 Reverse recovery speed is fast, two are selected
SR3603A, 60V parallel connection access；Switching tube 35 selects switching speed fast, and conducting resistance is small, the sufficiently large CSD19536 of pressure voltage.
Inductance 36 selects using 77254A7 to be magnetic core coiling inductance to meet design requirement.
As shown in figure 3, the voltage sample part of voltage and current sample circuit 4 is directly divided by output voltage, to guarantee to adopt
The precision of sample chooses suitable intrinsic standoff ratio, inputs after the emitter follower 41 of operational amplifier OPA118 composition and RC filtering
Converter ADS111842；Current sample part selects power big, the small constantan wire of temperature drift is adopted to guarantee the precision sampled
Sample resistance 43 inputs converter ADS111842, finally after voltage output current distributing monitor INA28244 increased drawdown
By two-way AD conversion obtain data are transmitted to control circuit 5.
As shown in figure 4, control circuit 5 includes MSP430F6638 single-chip microcontroller 54 and metal-oxide-semiconductor driving circuit；MSP430F6638
Single-chip microcontroller itself has that processing capacity is strong, resourceful, convenience and high-efficiency exploitation environment etc. in arithmetic speed, fast super low-power consumption, piece
Feature.MSP430F6638 single-chip microcontroller 54 receives the data from voltage and current sample circuit by I/O port and utilizes PID in system
Pressure stabilizing algorithm carries out negative-feedback regu- lation to system, and output control waveform PWM wave 51 inputs metal-oxide-semiconductor driving circuit；Metal-oxide-semiconductor driving
Circuit use low-loss driver UCC27211 52, its output end connect 10 Europe small resistance 53 to prevent metal-oxide-semiconductor
By electrostatic breakdown；Overcurrent protection and self-recovering function are controlled by feedback system, when detecting that output electric current is greater than 2A, control
Metal-oxide-semiconductor turns off, self- recoverage after the 2.5s that is delayed.
As shown in figure 5, man-machine interactive system 6 includes OLED display screen 63 and 3*4 matrix-scanning keyboard 62, OLED display screen
63 are connected by SPI interface with MSP430F6638 single-chip microcontroller 54, and 3*4 matrix-scanning keyboard 62 is connected with its I/O port, can be real
When monitoring output electric current and output voltage.
As shown in fig. 6, auxiliary power circuit 2 includes the first buck converter TPS5430 21, the second buck converter
TPS5430 22 and low-voltage-drop linear voltage regulator LM1117 23, the 15-18V DC voltage of input is through the first buck converter
9V DC voltage is obtained after TPS5430 21,9V DC voltage obtains 5V direct current after the second buck converter TPS5430 22
Pressure, 5V DC voltage obtain 3.3V DC voltage after low-voltage-drop linear voltage regulator LM1117 23.First buck converter
21 output end 9V voltage of TPS5430 is powered to low-loss driver UCC27211 52, the second buck converter TPS5430
22 output end 5V voltages are powered to operational amplifier OPA118 41 and MSP430F6638 single-chip microcontroller 54；Low-voltage-drop linear voltage regulator
23 output end 3.3V voltage of LM1117 is to converter ADS1118 42 and voltage output current distributing monitor INA282 44
Power supply.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
Although being described in conjunction with the accompanying specific embodiment of the present utility model above, those of ordinary skill in the art
It should be appreciated that these are merely examples, various deformation or modification can be made to these embodiments, it is practical without departing from this
Novel principle and essence.The scope of the utility model is only limited by the claims that follow.
Claims (7)
1. a kind of DC-DC converter system, characterized in that including system power supply input terminal, auxiliary power circuit, BOOST circuit,
Voltage and current sample circuit, control circuit and man-machine interactive system；Auxiliary power circuit input terminal connects system power supply input terminal,
Output end is feeder ear；BOOST circuit input end connects system power supply input terminal, and output end connects voltage and current sampling electricity
Road；The input terminal of voltage and current sample circuit output end connection control circuit；The control of the output end and BOOST circuit of control circuit
End connection processed；Man-machine interactive system is connected with control circuit.
2. DC-DC converter system as described in claim 1, characterized in that system power supply input terminal is 15-21V direct current
Pressure.
3. DC-DC converter system as claimed in claim 2, characterized in that auxiliary power circuit includes the first, second decompression
The 15-18V DC voltage of converter TPS5430 and low-voltage-drop linear voltage regulator LM1117, input pass through the first buck converter
TPS5430 is converted to 9V DC voltage；Second buck converter TPS5430 connection 9V DC voltage, and 9V DC voltage is turned
It is changed to 5V DC voltage；Low-voltage-drop linear voltage regulator LM1117 connection 5V DC voltage, and 5V DC voltage is converted into 3.3V
DC voltage.
4. DC-DC converter system as described in claim 1, characterized in that BOOST circuit includes the first electrolytic capacitor, the
Two electrolytic capacitors, ceramic disc capacitor, freewheeling diode, switching tube and inductance, the first electrolytic capacitor are connect with inductance one end, and inductance is another
One end is separately connected the drain electrode of freewheeling diode anode and switching tube, the source electrode ground connection of switching tube；The connection of freewheeling diode cathode
Second electrolytic capacitor, the second electrolytic capacitor are in parallel with ceramic disc capacitor；Freewheeling diode selects two SR360A, and 60V is in parallel, switch
Pipe selects CSD19536, and inductance selection is using 77254A7 as magnetic core coiling inductance.
5. DC-DC converter system as claimed in claim 3, characterized in that voltage and current sample circuit includes voltage sample
Part and current sample part；Voltage sample part includes the emitter follower of operational amplifier OPA118 composition, RC filtered electrical
Road and converter ADS1118；The emitter follower of operational amplifier OPA118 composition is separately connected RC filter circuit and AD turns
Parallel operation ADS1118；Current sample part includes constantan wire sampling resistor and voltage output current distributing monitor INA282, constantan
Silk sampling resistor is by RC circuit connection in voltage output current distributing monitor INA282 input terminal, voltage output current distributing
Monitor INA282 output end is connect with converter ADS1118, and the 5V DC voltage of auxiliary power circuit is operational amplifier
OPA118 power supply；The 3.3V DC voltage of auxiliary power circuit is converter ADS1118 and voltage output current distributing monitors
Device INA282 power supply.
6. DC-DC converter system as claimed in claim 3, characterized in that control circuit includes MSP430F6638 single-chip microcontroller
With metal-oxide-semiconductor driving circuit；MSP430F6638 single-chip microcontroller receives the data of voltage and current sample circuit by I/O port and utilizes PID
Pressure stabilizing algorithm carries out negative-feedback regu- lation to system, and output control waveform PWM wave inputs metal-oxide-semiconductor driving circuit；Metal-oxide-semiconductor driving electricity
Road uses driver UCC27211, in its output end one 10 Europe resistance of series connection；The 9V DC voltage of auxiliary power circuit is to drive
Dynamic device UCC27211 power supply；The 5V DC voltage of auxiliary power circuit is the power supply of MSP430F6638 single-chip microcontroller.
7. DC-DC converter system as claimed in claim 5, characterized in that man-machine interactive system include OLED display screen and
3*4 matrix-scanning keyboard, OLED display screen are connected by SPI interface with MSP430F6638 single-chip microcontroller, 3*4 matrix-scanning key
Disk is connected with MSP430F6638 single-chip I/O mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920003791.1U CN209375460U (en) | 2019-01-02 | 2019-01-02 | A kind of DC-DC converter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920003791.1U CN209375460U (en) | 2019-01-02 | 2019-01-02 | A kind of DC-DC converter system |
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| Publication Number | Publication Date |
|---|---|
| CN209375460U true CN209375460U (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920003791.1U Expired - Fee Related CN209375460U (en) | 2019-01-02 | 2019-01-02 | A kind of DC-DC converter system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673055A (en) * | 2019-10-18 | 2020-01-10 | 北京动力源科技股份有限公司 | Testing device of DC/DC converter and power supply testing system |
-
2019
- 2019-01-02 CN CN201920003791.1U patent/CN209375460U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673055A (en) * | 2019-10-18 | 2020-01-10 | 北京动力源科技股份有限公司 | Testing device of DC/DC converter and power supply testing system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190910 Termination date: 20210102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |