CN105071672B - A kind of control device and staggeredly BOOST synchronous rectifier converters - Google Patents
A kind of control device and staggeredly BOOST synchronous rectifier converters Download PDFInfo
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- CN105071672B CN105071672B CN201510478178.1A CN201510478178A CN105071672B CN 105071672 B CN105071672 B CN 105071672B CN 201510478178 A CN201510478178 A CN 201510478178A CN 105071672 B CN105071672 B CN 105071672B
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Abstract
A kind of the invention discloses control device and staggeredly BOOST synchronous rectifier converters, the control device includes：PWM controller, first reversing controller, first open-drain equipment, first driver, second reversing controller, second open-drain equipment, second driver, reversing controller and the co- controlling of open-drain equipment are passed through with this, the electric current for avoiding the two-way BOOST circuits when the two-way output of PWM controller is all low level is mutually filled and electric current fills phenomenon from the output of converter to input is anti-, and it is used as fairing by using Mos pipes, reduce conduction loss, improve the efficiency of staggeredly BOOST synchronous rectifier converters, reduce the failure risk that staggeredly BOOST synchronous rectifier converters are brought greatly by rectifying tube thermal stress, the radiator volume of staggeredly BOOST synchronous rectifier converters is also reduced simultaneously, so as to the miniaturization of follow-up staggeredly BOOST converter.
Description
Technical field
The present embodiments relate to telecommunication technology field, more particularly to a kind of control device and staggeredly BOOST synchronous rectifications
Converter.
Background technology
Interlock BOOST (boosting) converter in the prior art, is to carry out rectification using diode as shown in Fig. 1 institutes, and hands over
Wrong BOOST converter is carried out two-way output letter by PMW (Pulse Width Modulation, pulse width modulation) controllers
Number control, PMW controllers by this two-way output signal come controlling switch and fairing, when in two-way output all the way
When exporting high level, corresponding this way switch conducting, corresponding inductance starts to charge up accumulation of energy；And in two-way is exported all the way
Or two-way, while when exporting low level, switching tube is closed, commutation diode conducting, inductance releases energy.
Rectification is carried out due to using diode in the prior art, and in the case where exporting high current, rectification two
The conduction voltage drop of pole pipe is higher, so causes the conduction loss of commutation diode very high, even with Xiao that conduction voltage drop is minimum
Special based diode (SBD), can also produce 0.6V or so pressure drop, and commutation diode produces larger conduction loss, and this not only drops
The low efficiency of power supply, and increase the risk that power supply fails because rectifying tube diode bears higher thermal stress；In addition,
Because the size of two-way electric current has certain difference, this may result in two-way electric current and mutually fills phenomenon, in addition with being likely to occur
All it is low level dead time when the two-way output that PWM is controlled can also be present, the output end voltage of inductance may be more than defeated
Enter terminal voltage, at this moment occur that the output voltage of staggeredly BOOST converter fills phenomenon by inductance to input is anti-.
The content of the invention
It is too big for the conduction loss of the prior art staggeredly that BOOST converter is brought using diode rectification, and
Electric current is produced when staggeredly the two-way output of the PWM controller of BOOST synchronous rectifier converters is all low level mutually to fill and change
The output of device proposes a kind of control device to the anti-defect for filling phenomenon of input, the present invention, including：
PWM controller, for by the first output port respectively to the first driver, the first reversing controller and second
Open-drain equipment sends the first signal；And/or by the second output port respectively to the second driver, the second reversing controller and
First open-drain equipment sends secondary signal；
First reversing controller, reverse process is carried out for receiving first signal, and to first signal,
Generate the 3rd signal；
The first open-drain equipment, for receiving the secondary signal, the 4th signal is generated based on the secondary signal, and
3rd signal is carried out by open-drain processing based on the 4th signal, the 6th signal is generated；
First driver, processing is amplified for receiving first signal, and to first signal, generation
5th signal, and the 5th signal is sent to first switch, the first switch is controlled by the 5th signal
It is turned on and off；And for receiving the 6th signal, processing is amplified to the 6th signal, the 7th signal is generated, and will
7th signal is sent to first synchronous rectifier, and first synchronous rectifier is controlled by the 7th signal
Be turned on and off；
Second reversing controller, reverse process is carried out for receiving the secondary signal, and to the secondary signal,
Generate the 8th signal；
The second open-drain equipment, for receiving first signal, based on the signal of the first signal generation the 9th, and
8th signal is carried out by open-drain processing based on the 9th signal, the 11st signal is generated；
Second driver, processing is amplified for receiving the secondary signal, and to the secondary signal, generation
Tenth signal, and the tenth signal is sent to the second switch, control described second to open by the tenth signal
What is closed is turned on and off；And for receiving the 11st signal, processing, generation the 12nd are amplified to the 11st signal
Signal, and the tenth binary signal is sent to second synchronous rectifier, controlled by the tenth binary signal described
Second synchronous rectifier is turned on and off.
It is preferred that, first reversing controller, specifically for if first signal is high level signal, to described
First signal carries out reverse process, generates low level 3rd signal；If right and first signal is when being low level signal
First signal carries out reverse process, generates the 3rd signal of high level.
Second reversing controller, specifically for if the secondary signal is high level signal, to the secondary signal
Reverse process is carried out, low level 8th signal is generated；And if the secondary signal is when being low level signal, to described second
Signal carries out reverse process, generates the 8th signal of high level.
First driver, it is defeated specifically for receiving first from the PWM controller by the first receiving port
First signal of exit port, and processing is amplified to first signal, the 5th signal is generated, and pass through the first sending port
The 5th signal is sent to first switch, and receives the 6th signal, and processing is amplified to the 6th signal, is generated
7th signal, and the 7th signal is sent to the first synchronous rectifier by the second sending port；Wherein, first signal
It is consistent with the level state of the 5th signal；6th signal is consistent with the level state of the 7th signal；Described
The level state of six signals is the level state after the level state synthesis of the 3rd signal and the 4th signal.
Second driver, it is defeated specifically for receiving second from the PWM controller by the first receiving port
The secondary signal of exit port, and processing is amplified to the secondary signal, the tenth signal is generated, and pass through the first sending port
The tenth signal is sent to second switch, and the 11st signal is received by the second receiving port, and to the described 11st
Signal is amplified processing, generates the tenth binary signal, and same to second by the second sending port transmission the tenth binary signal
Walk rectifier；Wherein described secondary signal is consistent with the level state of the tenth signal, the 11st signal and described the
The level state of ten binary signals is consistent；The level state of 11st signal is the 8th signal and the 9th signal
Level state after level state synthesis.
It is preferred that, the first switch, the second switch, the first rectifier, the second rectifier are metal oxides half
Conductor Mos is managed.
The invention also provides one kind staggeredly BOOST synchronous rectifier converters, including control device.
Compared with prior art, a kind of control device is proposed in the present invention, passes through reversing controller and open-drain equipment
Co- controlling, it is to avoid the circuit when it is all low level that two-way, which is exported, mutually fill and it is anti-fill phenomenon, and using Mos pipes as whole
Device is flowed, conduction loss is reduced, improves the efficiency of staggeredly BOOST synchronous rectifier converters, staggeredly BOOST is reduced synchronous
The failure risk that rectifier converter is brought greatly by rectifying tube thermal stress, while also reducing staggeredly BOOST synchronous rectifier converters
Radiator volume, so as to the miniaturization of follow-up staggeredly BOOST converter.
Brief description of the drawings
Fig. 1 is the structural representation of BOOST converter of the prior art；
Fig. 2 is a kind of structural representation of control device disclosed by the invention；
Fig. 3 is a kind of structural representation of staggeredly BOOST synchronous rectifier converters disclosed by the invention.
Embodiment
As stated in the Background Art, staggeredly BOOST converter is too big using diode rectification conduction loss in the prior art, this
Invention proposes a kind of control device, including：
PWM controller, for by the first output port respectively to the first driver, the first reversing controller and second
Open-drain equipment sends the first signal；And/or by the second output port respectively to the second driver, the second reversing controller and
First open-drain equipment sends secondary signal.
As shown in Fig. 2 PWM controller has two-way output, the first output port and the second output port, first are corresponded to respectively
Output port connects the first driver, the first reversing controller and the second open-drain equipment respectively, and the second output port is distinguished
To connect the second driver, the second reversing controller and the first open-drain equipment.
First reversing controller, reverse process is carried out for receiving first signal, and to first signal,
Generate the 3rd signal.
First reversing controller, specifically for if first signal is high level signal, to first signal
Reverse process is carried out, low level 3rd signal is generated；And if first signal is when being low level signal, to described first
Signal carries out reverse process, generates the 3rd signal of high level.First reversing controller, as shown in Fig. 2 can be Reverse Turning Control
Circuit 1, the conversion for carrying out low and high level to the signal received, specifically, high level signal is converted into low level letter
Number, low level signal is converted into high level signal.
The first open-drain equipment, for receiving the secondary signal, generates the 4th signal, and be based on based on secondary signal
4th signal carries out open-drain processing to the 3rd signal, generates the 6th signal, and the 6th signal is sent into described the
One driver.
As shown in Fig. 2 the first open-drain equipment can be Open Drain (open-drain) circuit 1, Open Drain circuits 1 are connected
Second output port of PWM controller, the open-drain processing specifically carried out in the first open-drain equipment be comprehensive 3rd signal with
The 6th signal is generated after 4th signal.
First driver, processing is amplified for receiving first signal, and to first signal, generation
5th signal, and the 5th signal is sent to first switch, the first switch is controlled by the 5th signal
It is turned on and off；And for receiving the 6th signal, processing is amplified to the 6th signal, the 7th signal is generated, and will
7th signal is sent to first synchronous rectifier, and first synchronous rectifier is controlled by the 7th signal
Be turned on and off；；
First driver, it is defeated specifically for receiving first from the PWM controller by the first receiving port
First signal of exit port, and processing is amplified to first signal, the 5th signal is generated, and pass through the first sending port
The 5th signal is sent to first switch, and receives the 6th signal, and processing is amplified to the 6th signal, is generated
7th signal, and the 7th signal is sent to the first synchronous rectifier by the second sending port；Wherein, first signal
It is consistent with the level state of the 5th signal；6th signal is consistent with the level state of the 7th signal；Described
The level state of six signals is the level state after the level state synthesis of the 3rd signal and the 4th signal.
Specifically, as shown in Fig. 2 first switch is conversion switch 1, the first synchronous rectifier is circuit of synchronous rectification
1, the first driver is drive circuit 1, and wherein drive circuit 1 has two receiving ports, two sending ports, specifically, assuming
What the first output port and the second output port of PWM controller were all exported is low level signal, in the case, Reverse Turning Control
The low level signal received is converted to high level signal by circuit 1, and the connection of Open Drain circuits 1 is PWM controller
The second output port, reception is low level signal, export low level signal, with reverse control circuit export high level in
It is low level signal with the 6th signal of level generation is neutralized after rear generation low level, namely open-drain processing, and by the low level
Signal is sent to the second receiving port of drive circuit 1, and drive circuit 1 will be amplified place to the low level signal received
Reason, the first synchronous rectifier (circuit of synchronous rectification 1 in such as Fig. 2) is sent to this, and the first synchronous rectifier is Mos pipes,
The characteristic of Mos pipes is that open mode is in when receiving high level signal, and is closed when receiving low level signal,
Therefore now circuit of synchronous rectification 1 will always be in closed mode, and it is low that the first receiving port of drive circuit 1, which is received,
Level signal, and the low level signal is sent to first switch, because first switch is Mos pipes, therefore it is also at closing shape
State, with this likewise, second switch and the second rectifier be Mos pipe will also be closed, accordingly even when being that two-way is defeated
It is all low level state to go out, due to no generation path, and two-way BOOST circuits will not also occur electric current and mutually fill and export to defeated
Enter the anti-phenomenon filled, simultaneously because the conduction loss of Mos pipes is much smaller than the conduction loss of diode, so as to improve staggeredly BOOST
The efficiency of converter, reduces the failure risk that converter is brought greatly by rectifying tube thermal stress, while also reducing converter
Radiator volume, necessary condition is provided for the miniaturization of converter.
Second reversing controller, reverse process is carried out for receiving the secondary signal, and to the secondary signal,
Generate the 8th signal；
Second reversing controller, is specifically reverse control circuit 2 as shown in Figure 2, specifically for, if described second
Signal is high level signal, and reverse process is carried out to the secondary signal, generates low level 8th signal；And if described
When binary signal is low level signal, reverse process is carried out to the secondary signal, the 8th signal of high level is generated.
The second open-drain equipment, for receiving first signal, based on the signal of the first signal generation the 9th, and is based on
The 11st signal that 8th signal generated after open-drain processing is issued second driver by the 9th signal；Such as
Shown in Fig. 2, circuit 2 can be controlled for Open Drain.
Second driver a, receiving port is used to receive the secondary signal, and the secondary signal is carried out
Enhanced processing, generates the tenth signal, and the tenth signal is sent into the second switch, is controlled by the tenth signal
Make being turned on and off for the second switch；Another receiving port is used to receive the 11st signal, to the 11st signal
Processing is amplified, the tenth binary signal is generated, and the tenth binary signal is sent to second synchronous rectifier, passes through institute
The tenth binary signal is stated to control being turned on and off for second synchronous rectifier.
Second driver, it is defeated specifically for receiving second from the PWM controller by the first receiving port
The secondary signal of exit port, and processing is amplified to the secondary signal, the tenth signal is generated, and pass through the first sending port
The tenth signal is sent to second switch, and the 11st signal is received by the second receiving port, and to the described 11st
Signal is amplified processing, generates the tenth binary signal, and same to second by the second sending port transmission the tenth binary signal
Walk rectifier；Wherein described secondary signal is consistent with the level state of the tenth signal, the 11st signal and described the
The level state of ten binary signals is consistent；The level state of 11st signal is the state and the described 9th of the 8th signal
Level state after the level state neutralization of signal.
Specifically, as shown in Fig. 2 the second driver can be drive circuit 2, second switch is that conversion switch 2 (is opened
Device is closed to manage for Mos), the second synchronous rectifier can be synchronous rectificating device 2 (rectifying device is Mos pipes).
The invention also discloses a kind of BOOST synchronous rectifier converters that interlock, as shown in figure 3, including such as claim 1-6
Control device described in any one.
A kind of control device is proposed in the present invention, passes through reversing controller and the co- controlling of open-drain equipment, it is to avoid
Circuit when it is all low level that two-way, which is exported, mutually fill and it is anti-fill phenomenon, and be used as synchronous rectification dress by using Mos pipes
Put, reduce conduction loss, improve the efficiency of staggeredly BOOST converter, reduce staggeredly BOOST converter because rectifying tube heat
The failure risk that stress is brought greatly, while also reducing the radiator volume of staggeredly BOOST converter, interlocks so as to follow-up
The miniaturization of BOOST converter.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added to realize by software.Understood based on such, this hair
Bright technical scheme can be embodied in the form of software product, and the software product can be stored in a non-volatile memories
Medium (can be CD-ROM, USB flash disk, mobile hard disk etc.) in, including some instructions are to cause a computer equipment (can be
Personal computer, server, or network equipment etc.) perform method described in each of the invention implement scene.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram for being preferable to carry out scene, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also carry out one or more dresses that respective change is disposed other than this implement scene
In putting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
The invention described above sequence number is for illustration only, and the quality of implement scene is not represented.
Disclosed above is only several specific implementation scenes of the present invention, and still, the present invention is not limited to this, Ren Heben
What the technical staff in field can think change should all fall into protection scope of the present invention.
Claims (7)
1. a kind of control device, it is characterised in that including：
Pulse width modulation (PWM) controller, for by the first output port respectively to the first driver, the first reversing controller
And second open-drain control circuit send the first signal；With it is reverse to the second driver, second respectively by the second output port
Controller and the first open-drain control circuit send secondary signal；
First reversing controller, for receiving first signal, and carries out reverse process, generation to first signal
3rd signal；
First open-drain controls circuit, for receiving the secondary signal, and the 4th signal is generated based on the secondary signal, raw
Into the 4th signal it is consistent with the level state of the secondary signal, and the 3rd signal is carried out based on the 4th signal
Open-drain processing, generates the 6th signal, and the 6th signal is sent into first driver；The open-drain processing refers to electricity
It is flat with processing；
First driver, for receiving first signal, and is amplified processing, generation the 5th to first signal
Signal, and the 5th signal is sent to first switch, the unlatching of the first switch is controlled by the 5th signal
Or close；And for receiving the 6th signal, processing is amplified to the 6th signal, the 7th signal is generated, and will be described
7th signal is sent to the first synchronous rectifier, controlled by the 7th signal first synchronous rectifier unlatching or
Close；
Second reversing controller, for receiving the secondary signal, and carries out reverse process, generation to the secondary signal
8th signal；
Second open-drain controls circuit, for receiving first signal, based on the signal of the first signal generation the 9th, raw
Into the 9th signal it is consistent with the level state of first signal, and the 8th signal is carried out based on the 9th signal
Open-drain processing the 11st signal of generation, and the 11st signal is sent to second driver；
Second driver, for receiving the secondary signal, and is amplified processing, generation the tenth to the secondary signal
Signal, and the tenth signal is sent to second switch, the unlatching of the second switch is controlled by the tenth signal
Or close；And for receiving the 11st signal, processing is amplified to the 11st signal, the tenth binary signal is generated, and
Tenth binary signal is sent to the second synchronous rectifier, second synchronous rectification is controlled by the tenth binary signal
Device is turned on and off.
2. control device as claimed in claim 1, it is characterised in that
First reversing controller, specifically for if first signal is high level signal, being carried out to first signal
Reverse process, generates low level 3rd signal；And if first signal is when being low level signal, to first signal
Reverse process is carried out, the 3rd signal of high level is generated.
3. control device as claimed in claim 1, it is characterised in that
Second reversing controller, specifically for if the secondary signal is high level signal, being carried out to the secondary signal
Reverse process, generates low level 8th signal；And if the secondary signal is when being low level signal, to the secondary signal
Reverse process is carried out, the 8th signal of high level is generated.
4. control device as claimed in claim 1, it is characterised in that
First driver, specifically for receiving the first output end from the PWM controller by the first receiving port
First signal of mouth, and processing is amplified to first signal, the 5th signal is generated, and pass through the transmission of the first sending port
5th signal is to first switch, and processing is amplified to the 6th signal, generates the 7th signal, and pass through second
Sending port sends the 7th signal to the first synchronous rectifier；Wherein, the electricity of first signal and the 5th signal
Level state is consistent；6th signal is consistent with the level state of the 7th signal；The level state of 6th signal is
Level state after the level state synthesis of 3rd signal and the 4th signal；The synthesis refer to the 3rd signal and
The phase of 4th signal and computing.
5. control device as claimed in claim 1, it is characterised in that
Second driver, specifically for receiving the second output end from the PWM controller by the first receiving port
The secondary signal of mouth, and processing is amplified to the secondary signal, the tenth signal is generated, and pass through the transmission of the first sending port
Tenth signal is to second switch, and processing is amplified to the 11st signal, generates the tenth binary signal, and pass through
Second sending port sends the tenth binary signal to the second synchronous rectifier；Wherein described secondary signal and the tenth signal
Level state it is consistent, the 11st signal is consistent with the level state of the tenth binary signal；11st signal
Level state is the level state after the level state synthesis of the 8th signal and the 9th signal；The synthesis is referred to
Phase and the computing of 8th signal and the 9th signal.
6. control device as claimed in claim 1, it is characterised in that the first switch, the second switch, described first
Synchronous rectifier and second synchronous rectifier are Mos pipes.
The BOOST synchronous rectifier converters 7. one kind is interlocked, it is characterised in that including as claimed in any one of claims 1 to 6
Control device.
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| CN201510478178.1A CN105071672B (en) | 2015-08-06 | 2015-08-06 | A kind of control device and staggeredly BOOST synchronous rectifier converters |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527525A (en) * | 2009-04-08 | 2009-09-09 | 李成勇 | Synchronous rectification external drive proposal |
| CN102570833A (en) * | 2012-02-03 | 2012-07-11 | 华为技术有限公司 | Control circuit, method and converter for synchronous rectification |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8723487B2 (en) * | 2012-03-09 | 2014-05-13 | Majid Pahlevaninezhad | Zero voltage switching interleaved boost AC/DC converter |
| US9257864B2 (en) * | 2012-03-21 | 2016-02-09 | Cistel Technology Inc. | Input power controller for AC/DC battery charging |
| CN103441659B (en) * | 2013-09-18 | 2016-05-25 | 矽力杰半导体技术(杭州)有限公司 | Be applied to the control circuit of staggered-parallel-type Switching Power Supply |
-
2015
- 2015-08-06 CN CN201510478178.1A patent/CN105071672B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527525A (en) * | 2009-04-08 | 2009-09-09 | 李成勇 | Synchronous rectification external drive proposal |
| CN102570833A (en) * | 2012-02-03 | 2012-07-11 | 华为技术有限公司 | Control circuit, method and converter for synchronous rectification |
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