CN201629669U - Boosting synchronous rectification switching circuit - Google Patents
Boosting synchronous rectification switching circuit Download PDFInfo
- Publication number
- CN201629669U CN201629669U CN2009202968295U CN200920296829U CN201629669U CN 201629669 U CN201629669 U CN 201629669U CN 2009202968295 U CN2009202968295 U CN 2009202968295U CN 200920296829 U CN200920296829 U CN 200920296829U CN 201629669 U CN201629669 U CN 201629669U
- Authority
- CN
- China
- Prior art keywords
- resistance
- pin
- diode
- capacitor
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a boosting synchronous rectification switching circuit, comprising a PWM control module, an inductance L02, capacitors C03 and C04, resistances R05 and R06, and a switching tube K01; a phase inversion drive and a recharging suppression module are arranged between a synchronous rectification tube K02 and the PWM control module, a boosting assisting circuit module is arranged between one ends of the PWM control module and the synchronous rectification tube K02, so as to lead the low input voltage to be boosted to the voltage range that the PWM control module controls the IC to work normally by the PWM control module, after the PWM control module controls the IC to work normally, one path of output PWM pulse controls the switching tube K01, and the other path thereof drives the synchronous rectification tube K02 through the phase inversion drive and the recharging suppression module; when low voltage is input, the switching circuit can work reliably, the synchronous rectification function can be realized and the efficiency of the switching device is improved, so as to reach the purpose of designing high-efficiency boosting switching device under low input voltage and avoid current recharging phenomenon when the synchronous rectification tube is switched off.
Description
[technical field]
The utility model relates to a kind of circuit, is specifically related to a kind of synchronous rectification change-over circuit that boosts that is used under the low input.
[background technology]
Please refer to shown in Figure 1, traditional voltage up converting circuit comprises the PWM control module, be connected in switching tube on the PWM control module, be connected in capacitor C 0 and the resistance R 01, R02 of VOUT end between holding with GND, be connected in inductance L 0 and rectifier diode D0 between VOUT end and the Vin end, be connected in the capacitor C 02 between Vin end and the GND end, be connected in the resistance R 03 between PWM IC module and inductance L 0 one ends, the other two ends of described switching tube K0 are connected to reaching on the GND end between inductance L 0 and the rectifier diode D0.Described PWM IC module is connected between resistance R 01, the R02.Owing to adopt rectifier diode D0, make that its delivery efficiency is lower, the loss of power reaches temperature rise greatly.In addition, since the operating voltage height of the IC unit that the PWMIC module is controlled, the feasible boost converter that can't design than low input.
[utility model content]
Technical purpose of the present utility model be provide in order to solve the problem that above-mentioned prior art exists a kind of can satisfy carry out high efficiency boost conversion under the low input and avoid synchronous rectifier the synchronous rectification change-over circuit that boosts that phenomenon that electric current recharges takes place when shutdown, to occur.
In order to realize above-mentioned technical problem, the utility model provides a kind of synchronous rectification change-over circuit that boosts, it comprises the PWM control module that input and output are connected altogether, be connected in inductance L 02 between Vout end and the Vin end, be connected to the capacitor C 03 between Vout end or Vin end and the GND end, C04, be connected in the resistance R 05 between Vout end and the GND end, R06, be connected between joining between inductance L 02 and the synchronous rectifier K02 and the GND end and be connected in switching tube K01 on the PWM control module, between Vout end and Vin end, be provided with the synchronous rectifier K02 that is connected in series with inductance L 02, be provided with between place and middle the locating between two GND hold in the middle of between Vout end and the Vin end be connected the PWM control module on switching tube K01; Between synchronous rectifier K02 and PWM control module, be provided with paraphase and drive and recharge the inhibition module; Between PWM control module and synchronous rectifier K02 one end, be provided with the auxiliary circuit module of boosting.
According to above-mentioned major technique feature, described synchronous rectifier K02 comprises N channel field-effect pipe Q2, is connected in resistance R 6 between N channel field-effect pipe Q2 one end and the gate terminal; The other end of described N channel field-effect pipe Q2 also is connected with capacitor C 2, C3, C4, C5, C10, resistance R 12, R13, R14, R16 and inductance L 2; Described synchronous rectifier K02 is the N MOSFET pipe of N channel field-effect pipe.
According to above-mentioned major technique feature, described switching tube K01 comprises N channel field-effect pipe Q1, is connected in resistance R 10, diode D1 and voltage stabilizing didoe ZD1 on the N channel field-effect pipe Q1 grid; Described diode D1 and voltage stabilizing didoe ZD1 are connected in parallel.
According to above-mentioned major technique feature, described paraphase drives and recharges the inhibition module and comprises triode Q6, be connected in the resistance R 19 on the collector electrode of triode Q6, be connected in the triode Q5 on the triode Q6 base stage, be connected to the capacitor C 18 on the triode Q5 base stage, resistance R 21, be connected in the resistance R 22 between resistance R 21 and the capacitor C 18, be connected in the voltage stabilizing didoe ZD2 of an end on the resistance R 22, be connected in the resistance R 20 between voltage stabilizing didoe ZD2 negative terminal and the triode Q6 base stage, the triode Q4 that is connected with resistance R 20, be connected in the triode Q3 on the triode Q4 base stage, be connected in collector electrode and resistance R between the emitter 7 and diode D6 on the triode Q4, described resistance R 7 is connected in series with diode D6, is connected in the resistance R 9 between triode Q3 base stage and the emitter, capacitor C 17 and diode D7.
According to above-mentioned major technique feature, the described auxiliary circuit module of boosting comprises the integrated circuit voltage regulator U1 of built-in switch pipe, be arranged at pin 1 on the integrated circuit voltage regulator U1 to pin 8, be connected in the resistance R 1 on the pin 8, be connected in the diode D3 on the pin 1, be connected in the capacitor C 7 on the pin 3, these capacitor C 7 other ends are connected on the common ends of pin 2 and pin 4, and connect earth terminal, be connected in the capacitor C 8 between diode D3 and the resistance R 4, be connected in the resistance R 2 on the pin 5, R3, described resistance R 3 one ends are connected on the diode D3, be connected in the inductance L 3 on the diode D3 input, be connected in resistance R 8 and diode D2 on the inductance L 3, be connected in the resistance R 5 on this diode D2.
According to above-mentioned major technique feature, described PWM control module comprises PWM controller U201, be arranged at pin 1 on the U201 to pin 8, be connected in resistance R 11 and capacitor C 12 on the pin 2, be connected in the diode D4 on the capacitor C 12, be connected in the resistance R 23 on the diode D4 output, the other end of this resistance R 23 is connected with pin 8, be connected in the resistance R 15 on the pin 3, R17 and capacitor C 13, C14, be connected in the capacitor C 15 on resistance R 17 and the capacitor C 14 total ends, C16 and diode D5, be connected in the capacitor C 9 on the pin 7, be connected in the resistance R 18 between pin 4 and the pin 8.
Useful technique effect of the present utility model: drive and recharge the inhibition module because of between synchronous rectifier K02 and PWM control module, being provided with paraphase; Between PWM control module and synchronous rectifier K02 one end, be provided with the auxiliary circuit module of boosting, make the rectifier diode in traditional booster circuit is replaced by synchronous rectifier K02, the auxiliary circuit module of boosting will lower input voltage boosts to the voltage range of PWM control module control IC operate as normal, after the PWM control module control IC operate as normal, a road of the pwm pulse of output removes control switch pipe K01, another road drives and recharges inhibition module rear drive synchronous rectifier K02 through paraphase, so, when low pressure is imported, change-over circuit energy reliably working, synchronous rectification also can be realized, improved the efficient of transducer, carry out high efficiency boost conversion under the low input thereby reach to satisfy, also can avoid synchronous rectifier the phenomenon generation that electric current recharges when shutdown, to occur simultaneously.
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
[description of drawings]
Fig. 1 is the structural representation of voltage up converting circuit traditional in existing;
Fig. 2 is the square frame principle schematic diagram of synchronous rectification change-over circuit of boosting in the utility model;
Fig. 3 is the circuit diagram of synchronous rectification change-over circuit of boosting in the utility model;
Fig. 4 is the schematic diagram of the integrated circuit voltage regulator of built-in switch pipe in the utility model;
Fig. 5 is the schematic diagram of PWM control IC in the utility model.
[embodiment]
Please refer to Fig. 2 to shown in Figure 5, below in conjunction with specific embodiment a kind of synchronous rectification change-over circuit that boosts is described, it comprises the PWM control module that input and output are connected altogether, be connected in inductance L 02 between Vout end and the Vin end, be connected to the capacitor C 03 between Vout end or Vin end and the GND end, C04, be connected in the resistance R 05 between Vout end and the GND end, R06, be connected between joining between inductance L 02 and the synchronous rectifier K02 and the GND end and be connected in switching tube K01 on the PWM control module, between Vout end and Vin end, be provided with the synchronous rectifier K02 that is connected in series with inductance L 02, be provided with between place and middle the locating between two GND hold in the middle of between Vout end and the Vin end be connected the PWM control module on switching tube K01; Between synchronous rectifier K02 and PWM control module, be provided with paraphase and drive and recharge the inhibition module; Between PWM control module and synchronous rectifier K02 one end, be provided with the auxiliary circuit module of boosting.
Described synchronous rectifier K02 comprises N channel field-effect pipe Q2, is connected in resistance R 6 between N channel field-effect pipe Q2 one end and the gate terminal; The other end of described N channel field-effect pipe Q2 also is connected with capacitor C 2, C3, C4, C5, C10, resistance R 12, R13, R14, R16 and inductance L 2; Described synchronous rectifier K02 is the N MOSFET pipe of N channel field-effect pipe.
Described switching tube K01 comprises N channel field-effect pipe Q1, is connected in resistance R 10, diode D1 and voltage stabilizing didoe ZD1 on the Q1 grid; Described diode D1 and voltage stabilizing didoe ZD1 are connected in parallel.
Described paraphase drives and recharges the inhibition module and comprises triode Q6, be connected in the resistance R 19 on the collector electrode of triode Q6, be connected in the triode Q5 on the triode Q6 base stage, be connected to the capacitor C 18 on the triode Q5 base stage, resistance R 21, be connected in the resistance R 22 between resistance R 21 and the capacitor C 18, be connected in the voltage stabilizing didoe ZD2 of an end on the resistance R 22, be connected in the resistance R 20 between voltage stabilizing didoe ZD2 negative terminal and the triode Q6 base stage, the triode Q4 that is connected with resistance R 20, be connected in the triode Q3 on the triode Q4 base stage, be connected in collector electrode and resistance R between the emitter 7 and diode D6 on the triode Q4, described resistance R 7 is connected in series with diode D6, is connected in the resistance R 9 between triode Q3 base stage and the emitter, capacitor C 17 and diode D7.Paraphase drives with recharging the paraphase that suppresses in the module and drives and be meant that signal is carried out 180 degree to be amplified after oppositely again, promotes the power circuit of back, and it is the independent circuits that is connected in parallel on the drive circuit that recharging wherein suppressed.
The described auxiliary circuit module of boosting comprises the integrated circuit voltage regulator U1 of built-in switch pipe, be arranged at pin 1 on the integrated circuit voltage regulator U1 to pin 8, be connected in the resistance R 1 on the pin 8, be connected in the diode D3 on the pin 1, be connected in the capacitor C 7 on the pin 3, these capacitor C 7 other ends are connected on the common ends of pin 2 and pin 4, and connect earth terminal, be connected in the capacitor C 8 between diode D3 and the resistance R 4, be connected in the resistance R 2 on the pin 5, R3, described resistance R 3 one ends are connected on the diode D3, be connected in the inductance L 3 on the diode D3 input, be connected in resistance R 8 and diode D2 on the inductance L 3, be connected in the resistance R 5 on this diode D2.
Described PWM control module comprises PWM controller U201, be arranged at pin 1 on the PWM controller U201 to pin 8, be connected in resistance R 11 and capacitor C 12 on the pin 2, be connected in the diode D4 on the capacitor C 12, be connected in the resistance R 23 on the diode D4 output, the other end of this resistance R 23 is connected with pin 8, be connected in the resistance R 15 on the pin 3, R17 and capacitor C 13, C14, be connected in the capacitor C 15 on resistance R 17 and the capacitor C 14 total ends, C16 and diode D5, be connected in the capacitor C 9 on the pin 7, be connected in the resistance R 18 between pin 4 and the pin 8.
In the auxiliary circuit module of boosting, the integrated circuit voltage regulator U1 (MC34063) of built-in switch pipe is the PWM control module control chip of the energy low voltage starting work of integrated power pipe.Resistance R 8, diode D2 provide starting current, and after the auxiliary circuit module of boosting was exported stable voltage, PWM control module control circuit operate as normal, resistance R 5 were fed to output voltage the auxiliary circuit module of boosting again, keep the steady operation of accessory power supply unit.
In the PWM control module, after the input voltage of PWM controller U201 (UC2843) reaches normal working range, PWM controller U201 starts, a road of output pwm pulse removes control switch pipe Q1 through voltage stabilizing didoe ZD1 with D1 in parallel, simultaneously, another road pwm pulse carries out the alternation of pwm pulse paraphase conversion rear drive synchronous rectifier K02, switching tube Q1 and synchronous rectifier K02 through the paraphase driving circuit section, and the synchronous rectification conversion realizes boosting.PWM controller U201 adopts the PWM control IC of common current pattern.
Paraphase drives and recharges in the inhibition module, and pwm pulse drives synchronous rectifier K02 work after carrying out anti-phase conversion, shaping through resistance R 9, capacitor C 17, elements such as triode Q3, triode Q4 respectively.When pwm pulse is high level, switching tube Q1 conducting, synchronous rectifier K02 ends, inductance L 1 storage power; When pwm pulse was low level, switching tube Q1 ended, synchronous rectifier K02 conducting, and inductance L 1 energy stored flows to load through synchronous rectifier K02.The inhibition circuit function that recharges wherein is after cutting off the power supply, auxiliary power circuit is because the input terminal voltage reduction, the accessory power supply voltage of output reduces gradually, can not keep PWM controller U201 when work when being reduced to, the pwm pulse output pin can be exported normal low level, conducting normal high level can appear and in triode Q2, this moment voltage stabilizing didoe ZD2, resistance R 21, resistance R 22, the supply power voltage that triode Q5 detects PWM controller U201 is when quitting work voltage, can control triode Q6 saturation conduction by the output high level, making synchronous rectifier K02 is that low level is ended, when avoiding output voltage occurring like this and being higher than input voltage, synchronous rectifier K02 continues conducting and causes that electric current recharges phenomenon.
Based on above-mentioned, though described the invention by embodiment, those of ordinary skills know, the invention has many distortion and variation and do not break away from the spirit of the invention, wish that appended claim comprises these distortion and variation and do not break away from the spirit of the invention.
In sum, drive and recharge the inhibition module because of between synchronous rectifier K02 and PWM control module, being provided with paraphase; Between PWM control module and synchronous rectifier K02 one end, be provided with the auxiliary circuit module of boosting, make the rectifier diode in traditional booster circuit is replaced by synchronous rectifier K02, the auxiliary circuit module of boosting will lower input voltage boosts to the voltage range of PWM control module control IC operate as normal, after the PWM control module control IC operate as normal, a road of the pwm pulse of output removes control switch pipe K01, another road drives and recharges inhibition module rear drive synchronous rectifier K02 through paraphase, so, when low pressure is imported, change-over circuit energy reliably working, synchronous rectification also can be realized, improved the efficient of transducer, carry out high efficiency boost conversion under the low input thereby reach to satisfy, also can avoid synchronous rectifier the phenomenon generation that electric current recharges when shutdown, to occur simultaneously.
Claims (6)
1. synchronous rectification change-over circuit that boosts, it comprises the PWM control module that input and output are connected altogether, be connected in inductance L 02 between Vout end and the Vin end, be connected to the capacitor C 03 between Vout end or Vin end and the GND end, C04, be connected in the resistance R 05 between Vout end and the GND end, R06, be connected between joining between inductance L 02 and the synchronous rectifier K02 and the GND end and be connected in switching tube K01 on the PWM control module, it is characterized in that: between Vout end and Vin end, be provided with the synchronous rectifier K02 that is connected in series with inductance L 02, be provided with between place and middle the locating between two GND hold in the middle of between Vout end and the Vin end be connected the PWM control module on switching tube K01; Between synchronous rectifier K02 and PWM control module, be provided with paraphase and drive and recharge the inhibition module; Between PWM control module and synchronous rectifier K02 one end, be provided with the auxiliary circuit module of boosting.
2. the synchronous rectification change-over circuit that boosts according to claim 1 is characterized in that: described synchronous rectifier K02 comprises N channel field-effect pipe Q2, is connected in resistance R 6 between N channel field-effect pipe Q2 one end and the gate terminal; The other end of described N channel field-effect pipe Q2 also is connected with capacitor C 2, C3, C4, C5, C10, resistance R 12, R13, R14, R16 and inductance L 2; Described synchronous rectifier K02 is the N MOSFET pipe of N channel field-effect pipe.
3. the synchronous rectification change-over circuit that boosts according to claim 1 is characterized in that: described switching tube K01 comprises N channel field-effect pipe Q1, is connected in resistance R 10, diode D1 and voltage stabilizing didoe ZD1 on the N channel field-effect pipe Q1 grid; Described diode D1 and voltage stabilizing didoe ZD1 are connected in parallel.
4. the synchronous rectification change-over circuit that boosts according to claim 1, it is characterized in that: described paraphase drives and recharges the inhibition module and comprises triode Q6, be connected in the resistance R 19 on the collector electrode of triode Q6, be connected in the triode Q5 on the triode Q6 base stage, be connected to the capacitor C 18 on the triode Q5 base stage, resistance R 21, be connected in the resistance R 22 between resistance R 21 and the capacitor C 18, be connected in the voltage stabilizing didoe ZD2 of an end on the resistance R 22, be connected in the resistance R 20 between voltage stabilizing didoe ZD2 negative terminal and the triode Q6 base stage, the triode Q4 that is connected with resistance R 20, be connected in the triode Q3 on the triode Q4 base stage, be connected in collector electrode and resistance R between the emitter 7 and diode D6 on the triode Q4, described resistance R 7 is connected in series with diode D6, is connected in the resistance R 9 between triode Q3 base stage and the emitter, capacitor C 17 and diode D7.
5. the synchronous rectification change-over circuit that boosts according to claim 1, it is characterized in that: the described auxiliary circuit module of boosting comprises the integrated circuit voltage regulator U1 of built-in switch pipe, be arranged at pin 1 on the U1 to pin 8, be connected in the resistance R 1 on the pin 8, be connected in the diode D3 on the pin 1, be connected in the capacitor C 7 on the pin 3, these capacitor C 7 other ends are connected on the common ends of pin 2 and pin 4, and connect earth terminal, be connected in the capacitor C 8 between diode D3 and the resistance R 4, be connected in the resistance R 2 on the pin 5, R3, described resistance R 3 one ends are connected on the diode D3, be connected in the inductance L 3 on the diode D3 input, be connected in resistance R 8 and diode D2 on the inductance L 3, be connected in the resistance R 5 on this diode D2.
6. the synchronous rectification change-over circuit that boosts according to claim 1, it is characterized in that: described PWM control module comprises PWM controller U201, be arranged at pin 1 on the PWM controller U201 to pin 8, be connected in resistance R 11 and capacitor C 12 on the pin 2, be connected in the diode D4 on the capacitor C 12, be connected in the resistance R 23 on the diode D4 output, the other end of this resistance R 23 is connected with pin 8, be connected in the resistance R 15 on the pin 3, R17 and capacitor C 13, C14, be connected in the capacitor C 15 on resistance R 17 and the capacitor C 14 total ends, C16 and diode D5, be connected in the capacitor C 9 on the pin 7, be connected in the resistance R 18 between pin 4 and the pin 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202968295U CN201629669U (en) | 2009-12-31 | 2009-12-31 | Boosting synchronous rectification switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202968295U CN201629669U (en) | 2009-12-31 | 2009-12-31 | Boosting synchronous rectification switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629669U true CN201629669U (en) | 2010-11-10 |
Family
ID=43061068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202968295U Expired - Fee Related CN201629669U (en) | 2009-12-31 | 2009-12-31 | Boosting synchronous rectification switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201629669U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196521A (en) * | 2017-07-19 | 2017-09-22 | 上海仁机仪器仪表有限公司 | The low-power dissipation high pressure power module of Geiger Miller detector |
| CN107947534A (en) * | 2017-12-01 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of power IC and its driving method, display device |
-
2009
- 2009-12-31 CN CN2009202968295U patent/CN201629669U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196521A (en) * | 2017-07-19 | 2017-09-22 | 上海仁机仪器仪表有限公司 | The low-power dissipation high pressure power module of Geiger Miller detector |
| CN107947534A (en) * | 2017-12-01 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of power IC and its driving method, display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101674025B (en) | Multiplexed output auxiliary switch power source powered by commercial power and battery | |
| CN203368326U (en) | Boost circuit and LED driving power supply | |
| CN205178878U (en) | Single switch high -gain converter that contains voltage -multiplying unit | |
| CN101471608A (en) | Switch power supply circuit | |
| CN103490622A (en) | Single-switch high-gain boost converter | |
| CN101997434A (en) | Synchronous rectification device | |
| CN201854184U (en) | Buck circuit | |
| CN102005915B (en) | Boost and buck integrated bridge-free power factor correction (PFC) circuit | |
| CN203775027U (en) | High-voltage-boost-ratio converter with bidirectional voltage output used for photovoltaic module | |
| CN201577026U (en) | Isolated power supply module | |
| CN205195559U (en) | Novel DC -DC converter steps up | |
| CN201629669U (en) | Boosting synchronous rectification switching circuit | |
| CN104362773A (en) | Wireless electric energy transmitting device | |
| CN109510463A (en) | The continuous buck DC-DC converter of input and output electric current | |
| CN202043036U (en) | Novel micro-power high-voltage power supply | |
| CN210246596U (en) | Laser diode power supply | |
| CN101719723B (en) | Power supply device for realizing instant heavy current under current-limiting condition | |
| CN103746556A (en) | High step-up ratio converter for DC (Direct Current) module on basis of coupled inductors | |
| CN201797625U (en) | LED driving power circuit | |
| CN203775030U (en) | DC-module-used high-voltage-boost-ratio converter based on coupling inductors | |
| CN203590025U (en) | Single-switch high-gain boost converter | |
| CN200950234Y (en) | BUCK converter of realizing wide-range input | |
| CN210578260U (en) | Chip auxiliary power supply circuit | |
| CN210111853U (en) | Buck DC-DC converter with resistor-containing capacitor in series-parallel connection switching working mode | |
| CN208971387U (en) | Three-level boost type direct current conversion topology based on coupling winding unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20161231 |