CN206302338U - A kind of buck DC/DC converters - Google Patents
A kind of buck DC/DC converters Download PDFInfo
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- CN206302338U CN206302338U CN201621434066.2U CN201621434066U CN206302338U CN 206302338 U CN206302338 U CN 206302338U CN 201621434066 U CN201621434066 U CN 201621434066U CN 206302338 U CN206302338 U CN 206302338U
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- signal
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- buck
- filter capacitor
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Abstract
The utility model discloses a kind of buck DC/DC converters.It is made up of several DC/DC wired in parallel, DC/DC modules include input filter capacitor, receive the sampling resistor of input filter capacitor signal, receive boosting or the reduction voltage circuit of sampling resistor signal, collection boosting or the rectification module of reduction voltage circuit signal, receive the output sampling resistor of rectification module signal, receive output sampling resistor signal and the output filter capacitor for externally exporting, control boosting or the control chip of voltage reduction module, receive input filter capacitor signal and export to the input voltage sampling module of control chip, receive input sample resistance signal and export to the current sample of control chip, collection output sampling resistor signal is simultaneously exported to the output current sampling module of control chip, collection output filter capacitor signal is simultaneously exported to the output voltage sampling module of control chip.The utility model can for a long time export high current, and layout is easy, and reliability is high, and design cost is low.
Description
Technical field
The utility model is related to a kind of DC/DC converters, more particularly to a kind of by the dc voltage boost being input into or step-down
Ensure the constant buck DC/DC converters of output voltage.
Background technology
Buck DC/DC converters are that input voltage is carried out up conversion or down conversion to provide constant output electricity by one kind
The device of pressure.Usual buck DC/DC converters are used in automobile and intelligence equipment.When input voltage is higher than output voltage
During value, down conversion can be carried out to input voltage by the decompression mode of DC/DC converters, so as to reach target set point.When
When input voltage is less than output voltage, up conversion can be carried out to input voltage by the boost mode of DC/DC converters, so that
Output voltage is set to reach desirable value.In the prior art, buck DC/DC converters output current is smaller, even if output is larger
Electric current, its duration is short, therefore cannot meet the high-power demand for continuing output current.
Utility model content
Technical problem to be solved in the utility model is to provide one kind can overcome that output current is small, and the duration is short
Buck DC/DC converters, layout is simple, and reliability is high, and design cost is low, can also realize the defeated of long period high current
Go out.
The utility model discloses a kind of buck DC/DC converters, it is made up of several DC/DC wired in parallel, institute
Stating DC/DC modules includes input filter capacitor, receives the input sample resistance of input filter capacitor signal, receives input sample electricity
The rectification module of boosting or the reduction voltage circuit of signal, collection boosting or reduction voltage circuit signal is hindered, the defeated of rectification module signal is received
Go out sampling resistor, receive output sampling resistor signal and the output filter capacitor for externally exporting；The DC/DC modules also include control
Boosting or the control chip of reduction voltage circuit, receive input filter capacitor signal and export to the input voltage sampling mould of control chip
Block, receives input sample resistance signal and exports to the input current sampling module of control chip, collection output sampling resistor letter
Number and export to the output current sampling module of control chip, collection output filter capacitor signal is simultaneously exported to the defeated of control chip
Go out voltage sample module.
Further, the rectification module is synchronous rectification module, and the synchronous rectification module can reduce power consumption to carry
Dc-dc efficiency high.
Further, the DC/DC modules also include temperature sampling module, and the control chip receives temperature sampling module
Signal, prevents excess temperature from damaging dc-dc.
Further, the buck DC/DC converters also include a control chip for being used to adjust each DC/DC modules
The consistent regulation resistance of working frequency.
Further, the buck DC/DC converters also include a control chip for being used to adjust each DC/DC modules
Parameter makes the electric capacity of its synchronous averaging.
Further, the buck DC/DC converters also include a control chip for being used to adjust each DC/DC modules
The synchronous parallel coupled resistor capacitor of feedback signal, makes input and output feedback signal synchronization in each DC/DC module in parallel.
Further, the buck DC/DC converters also include a control chip for being used to adjust each DC/DC modules
The consistent pull-up resistor of mode of operation.
Buck DC/DC converters of the present utility model, layout is simple, and design cost is low, it is ensured that big for a long time electric
Stream output, its control process reliability is high.
Brief description of the drawings
Fig. 1 is the structural representation of buck DC/DC converters of the present utility model；
Fig. 2 is that DC-DC converter of the present utility model realizes the synchronous rough schematic view of signal.
The main DC/DC modules of wherein 1-；2- is from DC/DC modules；3- adjusts resistance；4- electric capacity；5- parallel coupled resistor capacitors；On 6-
Pull-up resistor.
Specific embodiment
With reference to embodiment, content of the present utility model is more specifically illustrated.Implementation of the present utility model is not limited to
The following examples, any formal accommodation or change made to the utility model all should be in protection scope of the present invention
It is interior.
Embodiment 1
The present embodiment is enumerated by two buck DC/DC converters for constituting in parallel of DC/DC modules 1,2, as shown in figure 1,
And one of DC/DC modules are called for main DC/DC modules 1, another DC/DC module is from DC/DC modules 2.
Single buck DC/DC modules, it includes input filter capacitor, receives the input sample of input filter capacitor signal
Resistance, receives the rectification module of boosting or the reduction voltage circuit of input sample resistance signal, collection boosting or reduction voltage circuit signal, this
Synchronous rectification module is used in embodiment, so as to reduce power consumption to improve DC/DC block converter efficiency；Receive rectification module letter
Number output sampling resistor, receive output sampling resistor signal and the output filter capacitor that externally exports；The DC/DC modules are also wrapped
The control chip of control boosting or reduction voltage circuit is included, input filter capacitor signal is received and is exported to the input voltage of control chip
Sampling module, receives input sample resistance signal and exports to the input current sampling module of control chip, collection output sampling
Resistance signal is simultaneously exported to the output current sampling module of control chip, is gathered output filter capacitor signal and is exported and gives control core
The output voltage sampling module of piece；The DC/DC modules also include temperature sampling module, and control chip receives temperature sampling module letter
Number input, prevent excess temperature damage DC/DC converters, for overheat protector.
The buck DC/DC converters according to disclosed in the utility model, can realize rising by following methods to circuit system
Step-down control.
When input voltage is less than target output voltage value, input voltage is carried out through two principal and subordinate DC/DC modules 1,2 in parallel
Boosting；Single DC/DC modules boost process is as follows：Input filter capacitor is by signal transmission to input sample resistance and input voltage
Signal is transferred to sampling module, input sample resistance booster circuit and input current sampling module respectively, and control chip is received
From tuning up Duty ratio control booster circuit after input voltage sampling module and input current sampling module signal so that voltage liter
Height, the synchronized rectification module of signal is transferred to output sampling resistor after synchronizing rectification, exports sampling resistor by signal transmission
To output current sampling module and output filter capacitor, output current sampling module is by signal transmission to control chip, output electricity
The signal of pressure sampling module collection output filter capacitor output simultaneously passes to control chip, and control chip receives signal simultaneously further
Judge the size of magnitude of voltage and target output voltage value；When magnitude of voltage is still less than target output voltage value, booster circuit is repeated, directly
Exported through output filter capacitor after reaching target output voltage value to voltage.
When input voltage is higher than target output voltage value, input voltage is carried out through two principal and subordinate DC/DC modules 1,2 in parallel
Boosting；Single DC/DC modules pressure reduction is as follows：Input filter capacitor is by signal transmission to input sample resistance and input voltage
Signal is transferred to sampling module, input sample resistance reduction voltage circuit and input current sampling module respectively, and control chip is received
From turning Duty ratio control booster circuit down after input voltage sampling module and input current sampling module signal so that voltage drop
It is low, output sampling resistor is transferred to after the synchronized rectification module synchronous rectification of signal, output sampling resistor transmits a signal to defeated
Go out current sample module and output filter capacitor, output current sampling module by signal transmission to control chip, adopt by output voltage
The signal of egf block collection output filter capacitor output simultaneously passes to control chip, and control chip receives signal and determines whether
The size of magnitude of voltage and target output voltage value；When magnitude of voltage is still greater than target output voltage value, reduction voltage circuit is repeated, until electric
Pressure is exported after reaching target output voltage value through output filter capacitor.
In order that parallel connection principal and subordinate DC/DC modules 1, the signal synchronization between 2, the utility model is additionally provided with some and synchronously controls
Part processed, as shown in Figure 2.In order to ensure principal and subordinate DC/DC modules 1 in parallel, working frequency is consistent between 2, and buck DC/DC becomes
Parallel operation is additionally provided with a regulation resistance 3, and two principal and subordinate's DC/DC modules in parallel are adjusted by adjusting the resistance of regulation resistance 3
1,2 master ＆ slave control working frequency of chip；In order that two synchronous averagings of principal and subordinate DC/DC modules 1,2 in parallel, buck DC/
DC converters are additionally provided with an electric capacity 4, start output delay time by adjusting the capacitance of electric capacity 4 and setting, so as to adjust parallel connection
Two principal and subordinate DC/DC modules 1, master ＆ slave control chip parameter in 2 is started synchronously with reaching；In order to control two principal and subordinate DC/ of parallel connection
DC modules 1, input and output feedback signal synchronization in 2, buck DC/DC converters are additionally provided with a parallel coupled resistor capacitor 5,
Two principal and subordinate DC/DC modules 1 in parallel are adjusted by setting the parameter of parallel coupled resistor capacitor 5, the master ＆ slave control chip feedback in 2
Signal, realizes input and output feedback signal synchronization；It is consistent in order to ensure two mode of operations of principal and subordinate DC/DC modules 1,2 in parallel, should
Buck DC/DC converters are additionally provided with a pull-up resistor 6, and high level is reached by the resistance value for adjusting pull-up resistor 6, real
Mode of operation is consistent between two principal and subordinate DC/DC modules 1,2 of existing parallel connection.
Additionally, for two principal and subordinate DC/DC modules 1 in parallel, occurring abnormal conditions, such as input current sampling module between 2
Or input voltage sampling module to detect input current, overtension or input voltage too low, or master ＆ slave control chip inspection
When measuring output current, overtension, master ＆ slave control chip blocks output voltage, to prevent excessively stream, over-pressed or under-voltage to DC/
DC modules 1,2 cause to damage；
Master ＆ slave control chip is judged after receiving temperature sampling module by signal, if temperature is too high, master ＆ slave control chip
Output voltage is blocked, prevents excess temperature from damaging master ＆ slave control chip.
Claims (7)
1. a kind of buck DC/DC converters, it is characterised in that：It is made up of several DC/DC wired in parallel, the DC/DC
Module includes input filter capacitor, receives the input sample resistance of input filter capacitor signal, receives input sample resistance signal
Boosting or reduction voltage circuit, collection boosting or reduction voltage circuit signal rectification module, receive rectification module signal output sampling
Resistance, receives output sampling resistor signal and the output filter capacitor for externally exporting；The DC/DC modules also include control boosting or
The control chip of reduction voltage circuit, receives input filter capacitor signal and exports to the input voltage sampling module of control chip, connects
Receive input sample resistance signal and export to the input current sampling module of control chip, collection output sampling resistor signal is simultaneously defeated
Go out to the output current sampling module of control chip, gather output filter capacitor signal and export to the output voltage of control chip
Sampling module.
2. buck DC/DC converters according to claim 1, it is characterised in that：The rectification module is synchronous rectification mould
Block.
3. buck DC/DC converters according to claim 1, it is characterised in that：The DC/DC modules are also adopted including temperature
Egf block, control chip receives the temperature sampling module by signal.
4. buck DC/DC converters according to claim 1, it is characterised in that：The converter also includes that one is used to adjust
Save the consistent regulation resistance of the control chip working frequency of each DC/DC modules.
5. buck DC/DC converters according to claim 1, it is characterised in that：The converter also includes that one is used to adjust
The control chip parameter for saving each DC/DC modules makes the electric capacity of its synchronous averaging.
6. buck DC/DC converters according to claim 1, it is characterised in that：The converter also includes that one is used to adjust
Save the synchronous parallel coupled resistor capacitor of the control chip feedback signal of each DC/DC modules.
7. buck DC/DC converters according to claim 1, it is characterised in that：The converter also includes that one is used to adjust
Save the consistent pull-up resistor of the control chip mode of operation of each DC/DC modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621434066.2U CN206302338U (en) | 2016-12-26 | 2016-12-26 | A kind of buck DC/DC converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621434066.2U CN206302338U (en) | 2016-12-26 | 2016-12-26 | A kind of buck DC/DC converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206302338U true CN206302338U (en) | 2017-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621434066.2U Active CN206302338U (en) | 2016-12-26 | 2016-12-26 | A kind of buck DC/DC converters |
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| CN (1) | CN206302338U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452054A (en) * | 2016-12-26 | 2017-02-22 | 上海展枭新能源科技有限公司 | Buck-boost DC/DC converter and buck-boost control method thereof for circuit system |
| CN107546981A (en) * | 2017-09-01 | 2018-01-05 | 歌尔股份有限公司 | A kind of power circuit |
-
2016
- 2016-12-26 CN CN201621434066.2U patent/CN206302338U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452054A (en) * | 2016-12-26 | 2017-02-22 | 上海展枭新能源科技有限公司 | Buck-boost DC/DC converter and buck-boost control method thereof for circuit system |
| CN107546981A (en) * | 2017-09-01 | 2018-01-05 | 歌尔股份有限公司 | A kind of power circuit |
| CN107546981B (en) * | 2017-09-01 | 2019-11-29 | 歌尔股份有限公司 | A kind of power circuit |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220621 Address after: 333000 north of Zhihang Road, high tech Zone, Changjiang District, Jingdezhen City, Jiangxi Province (within Jingdezhen Weihang Technology Co., Ltd.) Patentee after: Jiangxi Zhanxiao New Energy Technology Co.,Ltd. Address before: 201611 Building 5, Wenchang Enterprise Park, 50 CHEYANG Road, Songjiang District, Shanghai Patentee before: SHANGHAI CAPENERGY TECHNOLOGY Co.,Ltd. |