CN105071672A - Control device and staggered BOOST synchronous rectification converter - Google Patents
Control device and staggered BOOST synchronous rectification converter Download PDFInfo
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- CN105071672A CN105071672A CN201510478178.1A CN201510478178A CN105071672A CN 105071672 A CN105071672 A CN 105071672A CN 201510478178 A CN201510478178 A CN 201510478178A CN 105071672 A CN105071672 A CN 105071672A
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Abstract
The invention discloses a control device and a staggered BOOST synchronous rectification converter. The control device comprises a pulse-width modulation (PWM) controller, a first reverse controller, first open-drain equipment, a first driver, a second reverse controller, second open-drain equipment and a second driver, therefore, through common control of the reverse controllers and the open-drain equipment, the phenomena of mutual perfusion of current of two paths of BOOST circuits and reverse perfusion of current from the output to the input of the converter when two paths of outputs of the PWM controller are in low level are avoided; and a metal oxide semiconductor (MOS) tube is adopted as a rectifying device, so that the conduction loss is reduced; the efficiency of the staggered BOOST synchronous rectification converter is improved; the failure risk of the staggered BOOST synchronous rectification converter caused by high thermal stress of a rectifier tube is reduced; and meanwhile, the size of a radiator of the staggered BOOST synchronous rectification converter is also reduced, so that miniaturization of the subsequent staggered BOOST converter is facilitated.
Description
Technical field
The embodiment of the present invention relates to telecommunication technology field, particularly a kind of control appliance and staggered BOOST synchronous rectifier converter.
Background technology
Staggered BOOST (boosting) converter in prior art, as shown in Fig. 1 institute, adopt diode to carry out rectification, and staggered BOOST converter is by PMW (PulseWidthModulation, pulse width modulation) controller carries out the control of two-way output signal, PMW controller comes control switch and rectifying device by this two-way output signal, when two-way export Zhong mono-tunnel export high level time, this corresponding way switch conducting, corresponding inductance starts accumulation of energy of charging; And when two-way exports Zhong mono-tunnel or two-way while during output low level, switching tube is closed, rectifier diode conducting, inductance releases energy.
That diode is to carry out rectification due to what adopt in prior art, and when exporting big current, the conduction voltage drop of rectifier diode is higher, cause the conduction loss of rectifier diode very high like this, even if adopt the Schottky diode (SBD) that conduction voltage drop is minimum, also the pressure drop of about 0.6V can be produced, rectifier diode produces larger conduction loss, this not only lowers the efficiency of power supply, and increase the risk that power supply lost efficacy because rectifying tube diode bears higher thermal stress; In addition, there is certain difference in the size due to two-way electric current, this will cause two-way electric current to fill with phenomenon mutually, likely occurring that the two-way output controlled as PWM also can exist in addition is all low level Dead Time, the output end voltage of inductance may be greater than input terminal voltage, and the output voltage that at this moment there will be staggered BOOST converter fills with phenomenon by inductance to input is counter.
Summary of the invention
The conduction loss utilizing diode rectification to bring for staggered BOOST converter of the prior art is too large, and the two-way of the PWM controller of staggered BOOST synchronous rectifier converter export generation current when be all low level fill with mutually and the output of variator to the defect of input anti-filling phenomenon, the present invention proposes a kind of control device, comprising:
PWM controller, for passing through the first output port respectively to the first driver, the first reversing controller and second is opened leakage equipment and is sent the first signal; And/or by the second output port respectively to the second driver, the second reversing controller and first is opened leakage equipment and is sent secondary signal;
Described first reversing controller, for receiving described first signal, and carries out reverse process to described first signal, generates the 3rd signal;
Described first opens leakage equipment, for receiving described secondary signal, generating the 4th signal, and based on described 4th signal, the 3rd signal is carried out out drain process based on described secondary signal, generate the 6th signal;
Described first driver, for receiving described first signal, and being carried out amplification process to described first signal, generating the 5th signal, and described 5th signal is sent to the first switch, being controlled unlatching or the closedown of described first switch by described 5th signal; And for receiving the 6th signal, amplification process being carried out to described 6th signal, generates the 7th signal, and described 7th signal is sent to described first synchronous rectifier, controlled unlatching or the closedown of described first synchronous rectifier by described 7th signal;
Described second reversing controller, for receiving described secondary signal, and carries out reverse process to described secondary signal, generates the 8th signal;
Described second opens leakage equipment, for receiving described first signal, generating the 9th signal, and based on described 9th signal, the 8th signal being carried out out drain process, generate the 11 signal based on described first signal;
Described second driver, for receiving described secondary signal, and amplification process being carried out to described secondary signal, generating the tenth signal, and described tenth signal is sent to described second switch, unlatching or the closedown of described second switch is controlled by described tenth signal; And for receiving the 11 signal, amplification process is carried out to described 11 signal, generate the tenth binary signal, and described tenth binary signal is sent to described second synchronous rectifier, controlled unlatching or the closedown of described second synchronous rectifier by described tenth binary signal.
Preferably, described first reversing controller, specifically for, if described first signal is high level signal, reverse process is carried out to described first signal, generate low level 3rd signal; And if when described first signal is low level signal, carry out reverse process to described first signal, the 3rd signal of generation high level.
Described second reversing controller, specifically for, if described secondary signal is high level signal, reverse process is carried out to described secondary signal, generate low level 8th signal; And if when described secondary signal is low level signal, carry out reverse process to described secondary signal, the 8th signal of generation high level.
Described first driver, specifically for being received the first signal from the first output port of described PWM controller by the first receiving port, and amplification process is carried out to described first signal, generate the 5th signal, and send described 5th signal to the first switch by the first transmit port, and receive the 6th signal, and amplification process is carried out to described 6th signal, generate the 7th signal, and send described 7th signal to the first synchronous rectifier by the second transmit port; Wherein, described first signal is consistent with the level state of described 5th signal; Described 6th signal is consistent with the level state of described 7th signal; The level state of described 6th signal be the level state of described 3rd signal and the 4th signal comprehensive after level state.
Described second driver, specifically for being received the secondary signal from the second output port of described PWM controller by the first receiving port, and amplification process is carried out to described secondary signal, generate the tenth signal, and send described tenth signal to second switch by the first transmit port, and receive the 11 signal by the second receiving port, and amplification process is carried out to described 11 signal, generate the tenth binary signal, and send described tenth binary signal to the second synchronous rectifier by the second transmit port; Wherein said secondary signal is consistent with the level state of described tenth signal, and described 11 signal is consistent with the level state of described tenth binary signal; The level state of described 11 signal be the level state of described 8th signal and described 9th signal comprehensive after level state.
Preferably, described first switch, described second switch, the first rectifier, the second rectifier are that metal-oxide semiconductor (MOS) Mos manages.
The invention allows for a kind of staggered BOOST synchronous rectifier converter, comprise control device.
Compared with prior art, a kind of control device is proposed in the present invention, by reversing controller and the co-controlling opening leakage equipment, the circuit avoided when two-way output is all low level is filled with mutually and is filled with phenomenon with counter, and adopt Mos pipe as rectifying device, decrease conduction loss, improve the efficiency of staggered BOOST synchronous rectifier converter, reduce the failure risk that staggered BOOST synchronous rectifier converter brings greatly because of rectifying tube thermal stress, also reduce the radiator volume of staggered BOOST synchronous rectifier converter simultaneously, so that the miniaturization of follow-up staggered BOOST converter.
Accompanying drawing explanation
Fig. 1 is the structural representation of BOOST converter of the prior art;
Fig. 2 is the structural representation of a kind of control device disclosed by the invention;
Fig. 3 is the structural representation of a kind of staggered BOOST synchronous rectifier converter disclosed by the invention.
Embodiment
As stated in the Background Art, in prior art, staggered BOOST converter utilizes diode rectification conduction loss too large, the present invention proposes a kind of control device, comprising:
PWM controller, for being opened leakage equipment by the first output port send the first signal respectively to the first driver, the first reversing controller and second; And/or open leakage equipment by the second output port send secondary signal respectively to the second driver, the second reversing controller and first.
As shown in Figure 2, PWM controller has two-way to export, corresponding first output port and the second output port respectively, first output port connects the first driver respectively, leakage equipment opened by the first reversing controller and second, and the second output port connects the second driver respectively, leakage equipment opened by the second reversing controller and first.
Described first reversing controller, for receiving described first signal, and carries out reverse process to described first signal, generates the 3rd signal.
Described first reversing controller, specifically for, if described first signal is high level signal, reverse process is carried out to described first signal, generate low level 3rd signal; And if when described first signal is low level signal, carry out reverse process to described first signal, the 3rd signal of generation high level.First reversing controller as shown in Figure 2, can be reverse control circuit 1, for carrying out the conversion of low and high level to the received signal, concrete, high level signal is converted to low level signal, low level signal is converted to high level signal.
Described first opens leakage equipment, for receiving described secondary signal, generating the 4th signal, and open drain process based on the 4th signal to described 3rd signal based on secondary signal, generate the 6th signal, and described 6th signal is sent to described first driver.
As shown in Figure 2, first to open leakage equipment can be OpenDrain (opening leakage) circuit 1, OpenDrain circuit 1 connects the second output port of PWM controller, concrete open first opening after drain process is comprehensive 3rd signal and the 4th signal that leakage equipment carries out and generates the 6th signal.
Described first driver, for receiving described first signal, and being carried out amplification process to described first signal, generating the 5th signal, and described 5th signal is sent to the first switch, being controlled unlatching or the closedown of described first switch by described 5th signal; And for receiving the 6th signal, amplification process being carried out to described 6th signal, generates the 7th signal, and described 7th signal is sent to described first synchronous rectifier, controlled unlatching or the closedown of described first synchronous rectifier by described 7th signal; ;
Described first driver, specifically for being received the first signal from the first output port of described PWM controller by the first receiving port, and amplification process is carried out to described first signal, generate the 5th signal, and send described 5th signal to the first switch by the first transmit port, and receive the 6th signal, and amplification process is carried out to described 6th signal, generate the 7th signal, and send described 7th signal to the first synchronous rectifier by the second transmit port; Wherein, described first signal is consistent with the level state of described 5th signal; Described 6th signal is consistent with the level state of described 7th signal; The level state of described 6th signal be the level state of described 3rd signal and the 4th signal comprehensive after level state.
Concrete, as shown in Figure 2, first switch is conversion switch 1, first synchronous rectifier is circuit of synchronous rectification 1, first driver is drive circuit 1, wherein drive circuit 1 has two receiving ports, two transmit ports, concrete, what suppose that the first output port of PWM controller and the second output port all export is low level signal, in the case, the low level signal received is converted to high level signal by reverse control circuit 1, and OpenDrain circuit 1 connects is the second output port of PWM controller, what receive is low level signal, output low level signal, with rear generation low level in the high level exported with reverse control circuit, also namely opening the 6th signal generated with level in after drain process is low level signal, and this low level signal is sent to the second receiving port of drive circuit 1, drive circuit 1 will carry out amplification process to the low level signal received, the first synchronous rectifier (circuit of synchronous rectification 1 as in Fig. 2) is sent to this, and the first synchronous rectifier is Mos pipe, the characteristic of Mos pipe is in open mode when receiving high level signal, and when receiving low level signal, be in closed condition, therefore now circuit of synchronous rectification 1 will be in closed condition always, and the first receiving port of drive circuit 1 receives is low level signal, and this low level signal is sent to the first switch, because the first switch is Mos pipe, therefore also closed condition is in, same therewith, second switch and the second rectifier are that Mos pipe also will be in closed condition, even two-way exports like this is all low level state, owing to not there is path, also electric current can not be there is and fill with mutually and export to the anti-phenomenon of filling with of input in two-way BOOST circuit, simultaneously because the conduction loss of Mos pipe is much smaller than the conduction loss of diode, thus improve the efficiency of staggered BOOST converter, reduce the failure risk that converter brings greatly because of rectifying tube thermal stress, also reduce the radiator volume of converter simultaneously, for the miniaturization of converter provides necessary condition.
Described second reversing controller, for receiving described secondary signal, and carries out reverse process to described secondary signal, generates the 8th signal;
Described second reversing controller, concrete is reverse control circuit 2 as shown in Figure 2, specifically for, if described secondary signal is high level signal, reverse process is carried out to described secondary signal, generate low level 8th signal; And if when described secondary signal is low level signal, carry out reverse process to described secondary signal, the 8th signal of generation high level.
Described second opens leakage equipment, for receiving described first signal, generate the 9th signal, and the 11 signal generated after described 8th signal being carried out out drain process based on described 9th signal issues described second driver based on the first signal; As shown in Figure 2, can be OpenDrain control circuit 2.
Described second driver, a receiving port for receiving described secondary signal, and carries out amplification process to described secondary signal, generates the tenth signal, and described tenth signal is sent to described second switch, unlatching or the closedown of described second switch is controlled by described tenth signal; Another receiving port is for receiving the 11 signal, amplification process is carried out to described 11 signal, generate the tenth binary signal, and described tenth binary signal is sent to described second synchronous rectifier, controlled unlatching or the closedown of described second synchronous rectifier by described tenth binary signal.
Described second driver, specifically for being received the secondary signal from the second output port of described PWM controller by the first receiving port, and amplification process is carried out to described secondary signal, generate the tenth signal, and send described tenth signal to second switch by the first transmit port, and receive the 11 signal by the second receiving port, and amplification process is carried out to described 11 signal, generate the tenth binary signal, and send described tenth binary signal to the second synchronous rectifier by the second transmit port; Wherein said secondary signal is consistent with the level state of described tenth signal, and described 11 signal is consistent with the level state of described tenth binary signal; The level state of described 11 signal be in the state of described 8th signal and the level state of described 9th signal and after level state.
Concrete, as shown in Figure 2, the second driver can be drive circuit 2, and second switch is conversion switch 2 (switching device is Mos pipe), and the second synchronous rectifier can be synchronous rectificating device 2 (rectifying device is Mos pipe).
The invention also discloses a kind of staggered BOOST synchronous rectifier converter, as shown in Figure 3, comprise the control device as described in claim 1-6 any one.
A kind of control device is proposed in the present invention, by reversing controller and the co-controlling opening leakage equipment, the circuit avoided when two-way output is all low level is filled with mutually and is filled with phenomenon with counter, and by adopting Mos pipe to be used as synchronous rectificating device, decrease conduction loss, improve the efficiency of staggered BOOST converter, reduce the failure risk that staggered BOOST converter is brought greatly because of rectifying tube thermal stress, also reduce the radiator volume of staggered BOOST converter, so that the miniaturization of follow-up staggered BOOST converter simultaneously.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform each method implementing described in scene of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram preferably implementing scene, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device implemented in scene can carry out being distributed in the device of enforcement scene according to implementing scene description, also can carry out respective change and being arranged in the one or more devices being different from this enforcement scene.The module of above-mentioned enforcement scene can merge into a module, also can split into multiple submodule further.
The invention described above sequence number, just to describing, does not represent the quality implementing scene.
Be only several concrete enforcement scene of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (7)
1. a control device, is characterized in that, comprising:
Pulse width modulation (PWM) controller, for passing through the first output port respectively to the first driver, the first reversing controller and second is opened leakage equipment and is sent the first signal; And/or by the second output port respectively to the second driver, the second reversing controller and first is opened leakage equipment and is sent secondary signal;
Described first reversing controller, for receiving described first signal, and carries out reverse process to described first signal, generates the 3rd signal;
Described first opens leakage equipment, for receiving described secondary signal, generating the 4th signal, and based on described 4th signal, the 3rd signal is carried out out drain process based on described secondary signal, generate the 6th signal, and described 6th signal is sent to described first driver;
Described first driver, for receiving described first signal, and being carried out amplification process to described first signal, generating the 5th signal, and described 5th signal is sent to the first switch, being controlled unlatching or the closedown of described first switch by described 5th signal; And for receiving the 6th signal, amplification process being carried out to described 6th signal, generates the 7th signal, and described 7th signal is sent to described first synchronous rectifier, controlled unlatching or the closedown of described first synchronous rectifier by described 7th signal;
Described second reversing controller, for receiving described secondary signal, and carries out reverse process to described secondary signal, generates the 8th signal;
Described second opens leakage equipment, for receiving described first signal, generate the 9th signal based on described first signal, and based on described 9th signal, the 8th signal is carried out out drain process generation the 11 signal, and described 11 signal is issued described second driver;
Described second driver, for receiving described secondary signal, and amplification process being carried out to described secondary signal, generating the tenth signal, and described tenth signal is sent to described second switch, unlatching or the closedown of described second switch is controlled by described tenth signal; And for receiving the 11 signal, amplification process is carried out to described 11 signal, generate the tenth binary signal, and described tenth binary signal is sent to described second synchronous rectifier, controlled unlatching or the closedown of described second synchronous rectifier by described tenth binary signal.
2. control device as claimed in claim 1, is characterized in that,
Described first reversing controller, specifically for, if described first signal is high level signal, reverse process is carried out to described first signal, generate low level 3rd signal; And if when described first signal is low level signal, carry out reverse process to described first signal, the 3rd signal of generation high level.
3. control device as claimed in claim 1, is characterized in that,
Described second reversing controller, specifically for, if described secondary signal is high level signal, reverse process is carried out to described secondary signal, generate low level 8th signal; And if when described secondary signal is low level signal, carry out reverse process to described secondary signal, the 8th signal of generation high level.
4. control device as claimed in claim 1, is characterized in that,
Described first driver, specifically for being received the first signal from the first output port of described PWM controller by the first receiving port, and amplification process is carried out to described first signal, generate the 5th signal, and send described 5th signal to the first switch by the first transmit port, and amplification process is carried out to described 6th signal, generate the 7th signal, and send described 7th signal to the first synchronous rectifier by the second transmit port; Wherein, described first signal is consistent with the level state of described 5th signal; Described 6th signal is consistent with the level state of described 7th signal; The level state of described 6th signal be the level state of described 3rd signal and the 4th signal comprehensive after level state.
5. control device as claimed in claim 1, is characterized in that,
Described second driver, specifically for being received the secondary signal from the second output port of described PWM controller by the first receiving port, and amplification process is carried out to described secondary signal, generate the tenth signal, and send described tenth signal to second switch by the first transmit port, and amplification process is carried out to described 11 signal, generate the tenth binary signal, and send described tenth binary signal to the second synchronous rectifier by the second transmit port; Wherein said secondary signal is consistent with the level state of described tenth signal, and described 11 signal is consistent with the level state of described tenth binary signal; The level state of described 11 signal be the level state of described 8th signal and described 9th signal comprehensive after level state.
6. control device as claimed in claim 1, is characterized in that, second switch, described first rectifier and described second rectifier described in described first switch are Mos pipes.
7. a staggered BOOST synchronous rectifier converter, is characterized in that, comprises the control device as described in claim 1-6 any one.
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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 (5)
| 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 |
| US20130235631A1 (en) * | 2012-03-09 | 2013-09-12 | Majid Pahlevaninezhad | Zero voltage switching interleaved boost ac/dc converter |
| US20130249469A1 (en) * | 2012-03-21 | 2013-09-26 | Majid Pahlevaninezhad | Input power controller for ac/dc battery charging |
| US20150077073A1 (en) * | 2013-09-18 | 2015-03-19 | Silergy Semiconductor Technology (Hangzhou) Ltd | Control circuit of interleaved switching power supply |
-
2015
- 2015-08-06 CN CN201510478178.1A patent/CN105071672B/en active Active
Patent Citations (5)
| 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 |
| US20130235631A1 (en) * | 2012-03-09 | 2013-09-12 | Majid Pahlevaninezhad | Zero voltage switching interleaved boost ac/dc converter |
| US20130249469A1 (en) * | 2012-03-21 | 2013-09-26 | Majid Pahlevaninezhad | Input power controller for ac/dc battery charging |
| US20150077073A1 (en) * | 2013-09-18 | 2015-03-19 | Silergy Semiconductor Technology (Hangzhou) Ltd | Control circuit of interleaved switching power supply |
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