CN208461697U - One kind rectifying BUCK-BOOST digital power based on bi-directional synchronization - Google Patents
One kind rectifying BUCK-BOOST digital power based on bi-directional synchronization Download PDFInfo
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- CN208461697U CN208461697U CN201821109606.9U CN201821109606U CN208461697U CN 208461697 U CN208461697 U CN 208461697U CN 201821109606 U CN201821109606 U CN 201821109606U CN 208461697 U CN208461697 U CN 208461697U
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Abstract
The utility model provides a kind of based on bi-directional synchronization rectification BUCK-BOOST digital power, including BUCK-BOOST main circuit, metal-oxide-semiconductor, accessory power supply, driving circuit, signal conditioning circuit, ADC module and governor circuit, governor circuit control, driving circuit drives metal-oxide-semiconductor, signal conditioning circuit and ADC module acquisition input voltage, output voltage, the signal for exporting electric current, the signal of acquisition carries out operation control, constant pressure and flow output.With synchronous BUCK circuit and synchronous rectification BUCK-BOOST circuit topology made of synchronous BOOST circuits cascading, the rectifier diode in circuit is replaced using metal-oxide-semiconductor, pressure drop when being opened due to metal-oxide-semiconductor on metal-oxide-semiconductor is relatively low, the efficiency of power supply can be significantly improved, and digital power is constructed using STM32F334 high-performance 32-bit ARMCortex-M4MCU, real-time tracking output voltage reduces the steady state error of system.
Description
Technical field
The utility model belongs to field of power supplies, and in particular to one kind is based on bi-directional synchronization rectification BUCK-BOOST number electricity
Source.
Background technique
With the increasingly reduction of non-renewable resources, increase in demand of the people to new cleaning fuel is promoted such as too
Sun can generate electricity, the development of wind-power electricity generation, micro-capacitance sensor industry, storage release and the energy of energy are needed in these industry products
Two-way flow, for example the electricity that issues of solar energy, wind-force needs to boost that power grid could be accessed after inversion, and for battery or
The charge and discharge of super capacitor then need system that can be provided simultaneously with the function of boosting and decompression, realize that energy in bidirectional flow function is whole
It flows there are many kinds of driving circuit topologys, bidirectional DC-DC converter generally can be whole in classical topologies circuit by being replaced with metal-oxide-semiconductor
Stream diode obtains new topology, such as two-way Cuk circuit, Sepic circuit, Zeta circuit etc., wherein two-way Cuk circuit needs
Multiple inductance, export negative voltage, and the electric current of output is smaller；And Sepic circuit has extremely complex control loop characteristic, and efficiency
It is low；Zeta circuit is double Sepic circuits, it is desirable that the striding capacitance of higher input voltage ripple, large capacity.
Simple BUCK circuit or BOOST circuit currently on the market, can only be one-way flows, can not achieve the two-way of energy
Flowing can only realize stepping functions in same direction.
Therefore, the prior art also requires further improvement and develops.
Utility model content
The purpose of this utility model is to provide for a kind of based on bi-directional synchronization rectification BUCK-BOOST digital power, it is intended to
Solving circuit currently on the market can not achieve the two-way flow of energy, can only realize asking for stepping functions in same direction
Topic.
Used technical solution are as follows:
One kind rectifying BUCK-BOOST digital power based on bi-directional synchronization, including BUCK-BOOST main circuit, metal-oxide-semiconductor, auxiliary
Power supply, driving circuit, signal conditioning circuit, ADC module and governor circuit, governor circuit control are helped, driving circuit drives MOS
Pipe, signal conditioning circuit and ADC module acquisition input voltage, output voltage, the signal for exporting electric current, the signal of acquisition are transported
Calculate control, constant pressure and flow output.
BUCK-BOOST main circuit is formed by synchronizing BUCK circuit with synchronous BOOST circuits cascading.
Driving circuit uses half-bridge driven chip, and chip interior integrates bootstrap diode, external connection bootstrap capacitor.
Accessory power supply takes electricity from the input terminal and output end of BUCK-BOOST circuit by diode-isolated.
Operational amplifier TLV237 is arranged in signal conditioning circuit, and signal conditioning circuit includes input and output voltage detection circuit
And output current detection circuit, operational amplifier TLV237 are reduced output voltage using difference channel, ADC module sampling is realized
Input and output voltage detection, operational amplifier TLV237 sample differential realize input and output electric current detection.
For governor circuit using STM32F334 as main control chip, driving circuit is UCC27211 driving circuit, STM32F334
HRPWM module generate PWM, UCC27211 driving circuit drive metal-oxide-semiconductor.
The utility model has the advantages that the utility model, which provides one kind, rectifies BUCK-BOOST digital power based on bi-directional synchronization, use
BUCK circuit and synchronous rectification BUCK-BOOST circuit topology made of synchronous BOOST circuits cascading are synchronized, is replaced using metal-oxide-semiconductor
Rectifier diode in circuit, pressure drop when being opened due to metal-oxide-semiconductor on metal-oxide-semiconductor is relatively low, can significantly improve the effect of power supply
Rate, and digital power is constructed using STM32F334 high-performance 32-bit ARM Cortex-M4MCU, real-time tracking output voltage subtracts
The steady state error of few system.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model；
Fig. 2 is a kind of main electricity of BUCK-BOOST based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model
The circuit diagram on road；
Fig. 3 is a kind of metal-oxide-semiconductor driving circuit based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model
Circuit diagram；
Fig. 4 is a kind of circuit of the accessory power supply based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model
Figure；
Fig. 5 is a kind of input and output voltage inspection based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model
The circuit diagram of survey；
Fig. 6 is a kind of output electric current measure based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model
Circuit diagram；
Fig. 7 is a kind of circuit of the reference voltage based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model
Figure；
Fig. 8 is a kind of process of the system software based on bi-directional synchronization rectification BUCK-BOOST digital power of the utility model
Figure.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, clear, develop simultaneously implementation referring to the drawings
The utility model is further described in example.
One kind as shown in Figure 1 is based on bi-directional synchronization and rectifies BUCK-BOOST digital power, including the main electricity of BUCK-BOOST
Road, metal-oxide-semiconductor, accessory power supply, OLD driving circuit, signal conditioning circuit, ADC module and STM32F334 governor circuit.Wherein
As main control chip, PWM needed for being generated using the HRPWM module of F334 is driven STM32F334 by UCC27211 driver
Metal-oxide-semiconductor；The signals such as input voltage, output voltage, output electric current are acquired by signal conditioning circuit and ADC module, and utilizes and adopts
The signal of collection carries out operation control, to achieve the purpose that constant pressure and flow exports.Accessory power supply uses XL7005A, AMS1117-3.0
Transformation generates 12V, 3.3V two-way power supply respectively, and is MOS drive circuit, signal conditioning circuit, OLED drive, master control core
Piece power supply；The information such as working condition, output voltage, the output electric current of OLED display system.
As shown in Fig. 2, bi-directional synchronization rectification BUCK-BOOST circuit topology is by synchronous BUCK circuit and synchronous BOOST electricity
Road cascades, and bi-directional synchronization rectification BUCK-BOOST circuit realizes stepping functions in the same direction, and two-way same
The rectifier diode in circuit is replaced using metal-oxide-semiconductor in step rectification BUCK-BOOST circuit, when opening due to metal-oxide-semiconductor on metal-oxide-semiconductor
Pressure drop it is relatively low, the efficiency of power supply can be significantly improved.
As shown in figure 3, metal-oxide-semiconductor driving circuit has the half-bridge driven chip of independent high side and low side drive using TI
UCC27211, the chip interior integrate bootstrap diode, and outside need is connected bootstrap capacitor, driven by the way of Bootstrap
High side metal-oxide-semiconductor；Bootstrap capacitor chooses 0.47uF, and chip drives current peak is up to 4A, maximum guidance voltage DC 120V；?
Pwm signal input pin adds the pull down resistor of 10K, prevents metal-oxide-semiconductor when pwm signal input pull-down or high resistant from malfunctioning；Metal-oxide-semiconductor drives
Dynamic resistance uses 2 Ω, and without dead zone function, conducting when to prevent upper and lower bridge arm logical needs to be implemented on software chip interior
Dead zone function.
As shown in figure 4, accessory power supply takes electricity from the input terminal and output end of BUCK-BOOST circuit by diode-isolated,
It is converted by XL7005A and generates direct current 12V, converted by AMS1117-3.3 and generate 3.3V, A3.3V two-way power supply；Direct current 12V
It powers for driving chip to drive metal-oxide-semiconductor to work；Direct current 3.3V, A3.3V are STM32F334 and amplifier is powered.
As shown in figure 5, input and output voltage is scaled by output voltage using difference channel by amplifier TLV2374
The range that can be sampled to ADC module, reuses ADC module sampling, and software calculates output voltage.Input voltage sampling is logical
Cross inside F334 that amplifier is scaled to be sent to what ADC module was sampled.
As shown in fig. 6, output current detection circuit is realized by operational amplifier TLV2374 sample differential amplifying circuit；
Sampling resistor is placed on low side, if sampling resistor is placed on high-end, having biggish common-mode voltage keeps sample rate current inaccurate, sampling electricity
Resistance is 10m Ω, and since sampling resistor is smaller, the pressure drop on sampling resistor is smaller, is unfavorable for directly sampling, and needs to adopt again after amplifying
Sample；Since electric current two-way flow has just and has negative in the design, MCU cannot sample negative voltage, so needing a reference voltage will
Amplified negative voltage is raised to positive voltage and samples for MCU；As shown in fig. 7, reference voltage is produced with 3.3V by 1:1 electric resistance partial pressure
Raw 1.65V, the voltage follower output 1.65V formed through operational amplifier TLV2374 are used for circuit.
The pin of F334 governor circuit is as shown in table 1.
Table 1
Voltage mode control is used in digital power, i.e., generates mistake compared with desired output voltage by sampling and outputting voltage
Error input pid algorithm is calculated required duty ratio, achievees the purpose that pressure stabilizing is exported by changing duty ratio by difference signal.
As shown in figure 8, carrying out PID arithmetic in the interrupt routine of timer 3 and updating duty ratio, pid algorithm is divided into increment type and position
Set formula.
It should be understood that the application of the utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
It says, it can be modified or changed according to the above description, and all these modifications and variations all should belong to the appended power of the utility model
The protection scope that benefit requires.
Claims (6)
1. one kind based on bi-directional synchronization rectify BUCK-BOOST digital power, which is characterized in that including BUCK-BOOST main circuit,
Metal-oxide-semiconductor, accessory power supply, driving circuit, signal conditioning circuit, ADC module and governor circuit, the governor circuit control, institute
Driving circuit driving metal-oxide-semiconductor is stated, the signal conditioning circuit and ADC module acquisition input voltage, export electric current at output voltage
Signal, the signal of acquisition carry out operation control, constant pressure and flow output.
2. according to claim 1 rectify BUCK-BOOST digital power based on bi-directional synchronization, which is characterized in that described
BUCK-BOOST main circuit is formed by synchronizing BUCK circuit with synchronous BOOST circuits cascading.
3. according to claim 1 rectify BUCK-BOOST digital power based on bi-directional synchronization, which is characterized in that the drive
Dynamic circuit uses half-bridge driven chip, and the chip interior integrates bootstrap diode, external connection bootstrap capacitor.
4. according to claim 1 rectify BUCK-BOOST digital power based on bi-directional synchronization, which is characterized in that described auxiliary
Power supply is helped to take electricity from the input terminal and output end of BUCK-BOOST circuit by diode-isolated.
5. according to claim 1 rectify BUCK-BOOST digital power based on bi-directional synchronization, which is characterized in that the letter
Operational amplifier TLV237 is arranged in number conditioning circuit, and the signal conditioning circuit includes input and output voltage detection circuit and output
Current detection circuit, the operational amplifier TLV237 are reduced output voltage using difference channel, and ADC module sampling is realized defeated
Enter output voltage detection, the operational amplifier TLV237 sample differential realizes input and output electric current detection.
6. according to claim 1 rectify BUCK-BOOST digital power based on bi-directional synchronization, which is characterized in that the master
Circuit is controlled using STM32F334 as main control chip, the driving circuit is UCC27211 driving circuit, the STM32F334's
HRPWM module generates PWM, and the UCC27211 driving circuit drives metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821109606.9U CN208461697U (en) | 2018-07-13 | 2018-07-13 | One kind rectifying BUCK-BOOST digital power based on bi-directional synchronization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821109606.9U CN208461697U (en) | 2018-07-13 | 2018-07-13 | One kind rectifying BUCK-BOOST digital power based on bi-directional synchronization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631593A (en) * | 2018-07-13 | 2018-10-09 | 青岛华勋光电科技有限公司 | One kind being based on bi-directional synchronization rectification BUCK-BOOST digital powers |
| CN108631593B (en) * | 2018-07-13 | 2024-05-07 | 青岛华勋光电科技有限公司 | BUCK-BOOST digital power supply based on bidirectional synchronous rectification |
-
2018
- 2018-07-13 CN CN201821109606.9U patent/CN208461697U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631593A (en) * | 2018-07-13 | 2018-10-09 | 青岛华勋光电科技有限公司 | One kind being based on bi-directional synchronization rectification BUCK-BOOST digital powers |
| CN108631593B (en) * | 2018-07-13 | 2024-05-07 | 青岛华勋光电科技有限公司 | BUCK-BOOST digital power supply based on bidirectional synchronous rectification |
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