CN206313664U - A kind of high power buck-boost type Switching Power Supply - Google Patents
A kind of high power buck-boost type Switching Power Supply Download PDFInfo
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- CN206313664U CN206313664U CN201621328476.9U CN201621328476U CN206313664U CN 206313664 U CN206313664 U CN 206313664U CN 201621328476 U CN201621328476 U CN 201621328476U CN 206313664 U CN206313664 U CN 206313664U
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- 206010034133 Pathogen resistance Diseases 0.000 description 1
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Abstract
The utility model is related to a kind of high power buck-boost type Switching Power Supply, its input filter circuit, input current and input voltage measurement control circuit, buck-boost type power switch circuit, output current and output voltage detection control circuit, output filter circuit are connected in turn, and buck-boost type pwm control circuit connects input filter circuit, input current and input voltage measurement control circuit, buck-boost type power switch circuit, output current and output voltage detection control circuit, output filter circuit respectively.The input voltage for meeting wide scope is had the technical effect that, there can be good output voltage control characteristic in input voltage change scope very greatly, improve the overall efficiency of power supply, application field is more extensive, there is huge market potential.
Description
Technical field
The utility model is related to Switching Power Supply, more particularly to a kind of high power buck-boost Switching Power Supply.
Background technology
Conventional buck-step-up switching power supply does not possess high-output power load capacity, and small-power step-down in the market-
Step-up switching power supply is in many cases to waste energy, because the whole acc power of Switching Power Supply is smaller, for Switching Power Supply
The problem is not protruded.But for high power buck-boost Switching Power Supply, if without synchronous rectification, energy wave
The problem taken is then clearly.Conventional buck-step-up switching power supply implementation is using step-down, two sets of independent controls of boosting
Circuit control model, small product size is larger, and R＆D costs are higher, is unfavorable for large-scale production.Other conventional buck-booster type is opened
Powered-down source does not have synchronous rectification driving function using independent control chip.Synchronous rectification drives the drive for including being made up of special chip
Dynamic circuit or the driving circuit built by discrete device by the control of self-driven Transformer Winding.And traditional Switching Power Supply
What technology was typically used is all that transformer or inductor winding are powered, and is easily disturbed by system, causes power supply instability.
The content of the invention
In view of problem and defect that prior art is present, a kind of high power buck-boost switch of the utility model offer
Power supply, concrete technical scheme is, a kind of high power buck-boost Switching Power Supply, including input filter circuit, input current with
Input voltage measurement control circuit, buck-boost power switch circuit, output current and output voltage detection control circuit,
Output filter circuit, buck-boost pwm control circuit, it is characterised in that：Input interface, input filter circuit, input current
With input voltage measurement control circuit, buck-boost power switch circuit, output current and output voltage detection control electricity
Road, output filter circuit, output interface are connected in turn, and buck-boost pwm control circuit is respectively connecting to input filter
Wave circuit, input current and input voltage measurement control circuit, buck-boost power switch circuit, output current and output
Voltage detecting and controling circuit, output filter circuit；Wherein, buck-boost power switch circuit is connected as power switch metal-oxide-semiconductor
Q1, power switch metal-oxide-semiconductor Q2, power switch metal-oxide-semiconductor Q3, the source electrode of power switch metal-oxide-semiconductor Q4 are connected with inductance L1 two ends, power
The Q1 drain electrodes of switch metal-oxide-semiconductor are connected with input current with input voltage measurement control circuit output end, grid is by driving resistance R3
It is connected with buck-boost pwm control circuit TG1 ends, power switch metal-oxide-semiconductor Q2 drain electrodes are detected with output current with output voltage
Control circuit input end is connected, grid is connected by driving resistance R4 with buck-boost pwm control circuit TG2 ends, and power is opened
Metal-oxide-semiconductor Q3 drain electrodes are closed to be connected with power switch metal-oxide-semiconductor Q4 drain electrodes and be followed by by power samples resistance R9, R10, R11 in parallel
Ground, be connected with buck-boost pwm control circuit CSN ends by resistance R14, patch capacitor C17 again, it is electric by delay circuit
Resistance R8 be connected with buck-boost pwm control circuit CSP ends, by after delay circuit resistance R8, patch capacitor C16 ground connection, work(
Rate switch metal-oxide-semiconductor Q3 grids are connected by driving resistance R5 with buck-boost pwm control circuit BG1 ends, power switch MOS
Pipe Q4 grids are connected by driving resistance R6 with buck-boost pwm control circuit BG2 ends.
It is of the present utility model to have the technical effect that, there can be good output voltage in input voltage change scope very greatly
Control characteristic, there is high-power high-efficiency function, improves the utilization rate of power network, and portable higher, application field is extensive.
Brief description of the drawings
Fig. 1 is the utility model circuit catenation principle block diagram；
Fig. 2 is the electrical schematic diagram of high power buck-boost Switching Power Supply.
Specific embodiment
As shown in Figure 1, 2, a kind of high power buck-boost Switching Power Supply, including input filter circuit 1, input current
With input voltage measurement control circuit 2, buck-boost power switch circuit 3, output current and output voltage detection control electricity
Road 4, output filter circuit 5, buck-boost pwm control circuit 6, input interface, input filter circuit 1, input current with it is defeated
Enter voltage detecting and controling circuit 2, buck-boost power switch circuit 3, output current and output voltage detection control circuit 4,
Output filter circuit 5, output interface is connected in turn；37, the 38 pin connection of U1 in buck-boost pwm control circuit 6
36 pin of U1 are connected to input current with input into the output end of input filter circuit 1, buck-boost pwm control circuit 6
The output end of voltage detecting and controling circuit 2, in buck-boost pwm control circuit 6 21,26 pin of U1 be respectively connecting to step-down-liter
Q1 grids TG1, Q2 grid TG2 in die mould power switch circuit 3,17,19 pin of U1 point in buck-boost pwm control circuit 6
Q3 grid BG1, Q4 grid BG2, buck-boost pwm control circuit 6 in buck-boost power switch circuit 3 are not connected to
34 pin of middle U1 are connected to output current with the output voltage detection control input of circuit 4, buck-boost pwm control circuit 6
32 pin of middle U1 are connected to output current with the output voltage detection control output end of circuit 4, buck-boost pwm control circuit 6
9 pin of middle U1 are connected to the input of output filter circuit 5, and 30 pin of U1 are connected to defeated in buck-boost pwm control circuit 6
Go out the output end of filter circuit 5.Wherein buck-boost power switch circuit 3 is connected as power switch metal-oxide-semiconductor Q1, power switch
Metal-oxide-semiconductor Q2, power switch metal-oxide-semiconductor Q3, the source electrode of power switch metal-oxide-semiconductor Q4 are connected with inductance L1 two ends, power switch metal-oxide-semiconductor Q1
Drain electrode is connected with input current with the input voltage measurement control output end of circuit 2, grid is by driving resistance R3 and buck-boost
The TG1 ends of type pwm control circuit 6 are connected, and power switch metal-oxide-semiconductor Q2 drain electrodes detect control circuit 4 with output current and output voltage
Input is connected, grid is connected by driving resistance R4 with buck-boost pwm control circuit TG2 ends, power switch metal-oxide-semiconductor
Q3 drains and is connected with power switch metal-oxide-semiconductor Q4 drain electrodes and by being grounded after power samples resistance R9, R10, R11 in parallel, being led to again
Cross resistance R14, patch capacitor C17 be connected with the CSN ends of buck-boost pwm control circuit 6, by delay circuit resistance R8 with
The CSP ends of buck-boost pwm control circuit 6 are connected, by being grounded after delay circuit resistance R8, patch capacitor C16, power opens
Close metal-oxide-semiconductor Q3 grids to be connected with the BG1 ends of buck-boost pwm control circuit 6 by driving resistance R5, power switch metal-oxide-semiconductor
Q4 grids are connected by driving resistance R6 with the BG2 ends of buck-boost pwm control circuit 6, wherein, buck-boost PWM controls
Circuit processed 6 includes electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3, high frequency porcelain using LT8705 chips input filter circuit 1
The components such as chip capacitor C7, high frequency ceramic disc capacitor C8, high frequency ceramic disc capacitor C9 are constituted；Input current is controlled with input voltage measurement
Circuit 2 includes power samples resistance R1, power samples resistance R1a, power samples resistance R1b, high frequency ceramic disc capacitor C10, high frequency
The components such as ceramic disc capacitor C11 are constituted；Buck-boost power switch circuit 3 includes power switch metal-oxide-semiconductor Q1, power switch
Metal-oxide-semiconductor Q2, power switch metal-oxide-semiconductor Q3, power switch metal-oxide-semiconductor Q4, driving resistance R3, driving resistance R4, driving resistance R5, driving
Resistance R6, power samples resistance R9, power samples resistance R10, power samples resistance R10, delay circuit resistance R8, resistance R14,
The components such as patch capacitor C16, patch capacitor C17 are constituted；Output current is adopted with output voltage detection control circuit 4 including power
The units such as sample resistance R2, power samples resistance R2a, power samples resistance R2b, high frequency ceramic disc capacitor C12, high frequency ceramic disc capacitor C13
Device is constituted；Output filter circuit 5 includes electrochemical capacitor C4, electrochemical capacitor C5, electrochemical capacitor C6, high frequency ceramic disc capacitor C14, height
The components such as frequency ceramic disc capacitor C15 are constituted；Buck-boost pwm control circuit is included by insulting the master control that Li Erte producers develop
Coremaking piece LT8705 U1, Chip-R R12, Chip-R R13, Chip-R R15, Chip-R R16, Chip-R R17,
Chip-R R18, Chip-R R19, Chip-R R20, Chip-R R21, Chip-R R22, Chip-R R23, paster
Resistance R24, Chip-R R15, high frequency ceramic disc capacitor C18, high frequency ceramic disc capacitor C19, high frequency ceramic disc capacitor C20, high frequency ceramics
Electric capacity C21, high frequency ceramic disc capacitor C22, high frequency ceramic disc capacitor C23, high frequency ceramic disc capacitor C24, high frequency ceramic disc capacitor C25, high frequency
The components such as ceramic disc capacitor C26, bootstrap diode D1, bootstrap diode D2 are constituted.
The utility model realizes that wide scope input is high using the buck-boost regulation circuit designed by analog electronics
Power efficient buck-boost Switching Power Supply is designed, in order to reduce the switching loss of power MOSFET tube, using this design
The converter of scheme would generally the relation of monitoring input voltage and output voltage determine to be operated in different patterns.
When input voltage is significantly higher than output voltage, device will operate in depressor area.In the workspace, MOS is switched
Pipe Q3 is turned off all the time.In addition, switch metal-oxide-semiconductor Q2 is then turned on all the time, unless detected in burst modulo operation or discontinuous mode
Reverse current.In the starting point in each cycle, synchro switch metal-oxide-semiconductor Q4 is first turned on.When metal-oxide-semiconductor Q4 conductings are switched, by sampling
Resistance detects to inductive current, and a slope-compensation slope is added to detection voltage, and then compared with reference voltage
Compared with.After detection inductive current is brought down below reference voltage, metal-oxide-semiconductor Q4 shut-offs are switched in the remaining time in the cycle, and
The Q1 conductings of switch metal-oxide-semiconductor.Metal-oxide-semiconductor Q1 and switch metal-oxide-semiconductor Q4 are switched by alternate conduction.
When input voltage is close to output voltage, switch power controller enters buck-boost area.In each cycle,
If controller is to switch the conducting of metal-oxide-semiconductor Q4 and switch metal-oxide-semiconductor Q2 as starting, the initial operation of switch power controller
It is like in depressor area.Switch metal-oxide-semiconductor Q4 is turned off and is switched metal-oxide-semiconductor Q1 conductings, untill the centre of clock cycle.
Then, switch metal-oxide-semiconductor Q2 is turned off and is switched metal-oxide-semiconductor Q3 conductings.Subsequent mode of operation is similar with boost mode, final switch
Metal-oxide-semiconductor Q3 is turned off and is switched metal-oxide-semiconductor Q2 conductings, untill end cycle.
If switch power controller is to switch the conducting of metal-oxide-semiconductor Q1 and switch metal-oxide-semiconductor Q3 as starting, Switching Power Supply
The initial operation of controller is similar with boost mode.Switch metal-oxide-semiconductor Q3 is turned off and is switched metal-oxide-semiconductor Q2 conductings, until the clock cycle
Centre untill.Then, switch metal-oxide-semiconductor Q1 is turned off and is switched metal-oxide-semiconductor Q4 conductings.Subsequent mode of operation and decompression mode class
Seemingly, final switch metal-oxide-semiconductor Q4 is turned off and is switched metal-oxide-semiconductor Q1 conductings, untill end cycle.
When output voltage is significantly higher than input voltage, device will operate in press area, in the workspace, switch MOS
Pipe Q1 is turned on all the time, in addition, switch metal-oxide-semiconductor Q4 is then turned off all the time, in the starting point in each cycle, synchro switch metal-oxide-semiconductor Q3 is first
Conducting, when metal-oxide-semiconductor Q3 conductings are switched, is detected, a slope-compensation slope is added to by sampling resistor to inductive current
Detection voltage, and be then compared with reference voltage.After detection inductive current is elevated above reference voltage, in the cycle
Remaining time in switch metal-oxide-semiconductor Q3 shut-off, and switch metal-oxide-semiconductor Q2 conductings, switch metal-oxide-semiconductor Q3 and switch metal-oxide-semiconductor Q2 will replace
Conducting, its switch motion is similar to a typical synchronous boost type voltage-stablizer.
When output voltage is significantly larger than input voltage, the dutycycle of switch metal-oxide-semiconductor Q3 will increase.Cause switch metal-oxide-semiconductor
The turn-off time of Q3 switches is reduced.The turn-off time of switch metal-oxide-semiconductor Q3 switches should be maintained at higher than 245ns, to maintain stable state to grasp
Make, and avoid the situation that duty cycle dither, output ripple increase and maximum output current reduces from occurring.
Principle
The pulsating voltage signal of input is sent to after input filter circuit, input filter circuit filter input voltage, should
Voltage signal flows through input current and controls circuit with input voltage measurement, sentences by carrying out detection to input voltage and input current
Have no progeny, determine high power buck-boost Switching Power Supply mode of operation, and voltage signal is transmitted to buck-boost PWM controls
Circuit processed, buck-boost pwm control circuit output voltage signal is transferred to output current with output voltage detection control electricity
Road, after output current carries out detection judgement with output voltage detection control circuit to output voltage and output current, voltage is believed
Number output filter circuit is sent to, so as to obtain required voltage signal.Buck-boost pwm control circuit is to input current
Signal detection is carried out with input voltage measurement control circuit, to output current and output voltage detection control circuit, realize inside
The confirmation of mode of operation, so that realize carrying out buck-boost power switch circuit hair pulse signal control, so as to reach tune
The purpose of section output voltage and output current, it is ensured that power good reliably works.
The input bleeder circuit being made up of divider resistance R17, R19 is sampled to input voltage, by the voltage after sampling
Value and U1（LT8705）The a reference value of inner setting is compared, and calculation process is carried out by internal arithmetic amplifier, by result
Buck-boost power switch circuit is fed back to, so as to the purpose for reaching under-voltage protection, mode of operation determines.Input current ring
Control is sampled by current divider sampling resistor R1, sampling resistor R1a, sampling resistor R1b to input current, after current sample
Signal is input to the negative terminal of internal arithmetic amplifier as Setting signal.Reference signal can be by U1（LT8705）Inner setting
Produce, the purpose that overcurrent protection is input into Switching Power Supply is reached with this.
The bleeder circuit being made up of divider resistance R7, R12 and R13 is sampled to output voltage, by divider resistance R7,
R12 and R13 carries out partial pressure, and Voltage loop is by the magnitude of voltage and U1 after partial pressure（LT8705）The a reference value of inner setting is compared,
Calculation process is carried out by internal arithmetic amplifier, result is fed back into buck-boost power switch circuit, so as to reach tune
Save the purpose of output voltage.Output current ring is controlled by current divider sampling resistor R2, sampling resistor R2a, sampling resistor R2b to defeated
Go out electric current to be sampled, the signal after current sample is input to the negative terminal of internal arithmetic amplifier, benchmark letter as Setting signal
Number can be by U1（LT8705）Inner setting is produced, and the purpose of regulation output current is reached with this.
By foregoing circuit so that by after the filtering of input filter circuit 1, being controlled by input current and input voltage measurement
Circuit 2, buck-boost power switch circuit 3, output current and output voltage detection control circuit 4, output filter circuit 5
Afterwards, output voltage signal is transported to output port.Voltage and current signal after output is controlled by, buck-boost PWM
Circuit 6 is sampled, is compared, analyzed, judged.
Claims (1)
1. a kind of high power buck-boost Switching Power Supply, including input filter circuit（1）, input current and input voltage inspection
Observing and controlling circuit（2）, buck-boost power switch circuit（3）, output current and output voltage detection control circuit（4）, it is defeated
Go out filter circuit（5）, buck-boost pwm control circuit（6）, it is characterised in that：Input interface, input filter circuit（1）、
Input current controls circuit with input voltage measurement（2）, buck-boost power switch circuit（3）, output current with output electricity
Pressure detection control circuit（4）, output filter circuit（5）, output interface be connected in turn, buck-boost PWM control electricity
Road（6）It is respectively connecting to input filter circuit（1）, input current and input voltage measurement control circuit（2）, buck-boost
Power switch circuit（3）, output current and output voltage detection control circuit（4）, output filter circuit（5）；Wherein, be depressured-
Boost type power on-off circuit（3）It is connected as power switch metal-oxide-semiconductor Q1, power switch metal-oxide-semiconductor Q2, power switch metal-oxide-semiconductor Q3, work(
The source electrode of rate switch metal-oxide-semiconductor Q4 is connected with inductance L1 two ends, and power switch metal-oxide-semiconductor Q1 drain electrodes are examined with input current with input voltage
Observing and controlling circuit（2）Output end is connected, grid is by driving resistance R3 and buck-boost pwm control circuit（3）TG1 ends phase
Even, power switch metal-oxide-semiconductor Q2 drain electrodes and output current and output voltage detection control circuit（4）Input is connected, grid passes through
Drive resistance R4 and buck-boost pwm control circuit（6）TG2 ends are connected, and power switch metal-oxide-semiconductor Q3 drains and power switch
Metal-oxide-semiconductor Q4 drain electrodes are connected and by being grounded after power samples resistance R9, R10, R11 in parallel, again by resistance R14, paster electricity
Hold C17 to be connected with buck-boost pwm control circuit CSN ends, controlled by delay circuit resistance R8 and buck-boost PWM
Circuit CSP ends be connected, by after delay circuit resistance R8, patch capacitor C16 be grounded, power switch metal-oxide-semiconductor Q3 grids by drive
Dynamic resistance R5 is connected with buck-boost pwm control circuit BG1 ends, power switch metal-oxide-semiconductor Q4 grids by drive resistance R6 and
Buck-boost pwm control circuit BG2 ends are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621328476.9U CN206313664U (en) | 2016-12-06 | 2016-12-06 | A kind of high power buck-boost type Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621328476.9U CN206313664U (en) | 2016-12-06 | 2016-12-06 | A kind of high power buck-boost type Switching Power Supply |
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| Publication Number | Publication Date |
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| CN206313664U true CN206313664U (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621328476.9U Expired - Fee Related CN206313664U (en) | 2016-12-06 | 2016-12-06 | A kind of high power buck-boost type Switching Power Supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445379A (en) * | 2019-07-12 | 2019-11-12 | 华南理工大学 | A kind of direct current level converter for wireless energy transfer system output stage |
| CN110962525A (en) * | 2018-09-30 | 2020-04-07 | 广东威灵汽车部件有限公司 | Electric automobile, compressor and control method and device of compressor |
| CN116345645A (en) * | 2023-05-29 | 2023-06-27 | 深圳市鑫赛科科技发展有限公司 | Power supply circuit, method and system for wide-range voltage input |
-
2016
- 2016-12-06 CN CN201621328476.9U patent/CN206313664U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110962525A (en) * | 2018-09-30 | 2020-04-07 | 广东威灵汽车部件有限公司 | Electric automobile, compressor and control method and device of compressor |
| CN110962525B (en) * | 2018-09-30 | 2021-10-22 | 广东威灵汽车部件有限公司 | Electric automobile, compressor and control method and device of compressor |
| CN110445379A (en) * | 2019-07-12 | 2019-11-12 | 华南理工大学 | A kind of direct current level converter for wireless energy transfer system output stage |
| CN116345645A (en) * | 2023-05-29 | 2023-06-27 | 深圳市鑫赛科科技发展有限公司 | Power supply circuit, method and system for wide-range voltage input |
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Effective date of registration: 20180926 Address after: 300211 No. 6, Taishan Road, Tianjin, Hexi District Patentee after: TIANJIN HUIGAO MAGNETICS Co.,Ltd. Address before: 300211 No. 6, Taishan Road, Tianjin, Hexi District Patentee before: TIANJIN PHOTOELECTRIC RUNDA ELECTRONICS Co.,Ltd. |
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