CN201063541Y - High-frequency highly effective boosting DC/DC converter - Google Patents
High-frequency highly effective boosting DC/DC converter Download PDFInfo
- Publication number
- CN201063541Y CN201063541Y CNU2007201248669U CN200720124866U CN201063541Y CN 201063541 Y CN201063541 Y CN 201063541Y CN U2007201248669 U CNU2007201248669 U CN U2007201248669U CN 200720124866 U CN200720124866 U CN 200720124866U CN 201063541 Y CN201063541 Y CN 201063541Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- input
- connects
- operational amplifier
- 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 discloses a high-frequency high-effect boost DC/DC converter which comprises a voltage reference circuit, an error amplifier, a current detection circuit, a current error operation amplifier, a PWM comparator, an oscillating circuit, an over-voltage and over-current protection circuit, a logic control circuit, a high-end transistor driving circuit and a low-end transistor driving circuit. The utility model is characterized in that: the input end of a PWM/PFM switching control circuit is connected with the output ends of the reference circuit and the current error operation amplifier respectively, the output end of the PWM/PFM switching control circuit is connected with the oscillating circuit; with the PWM/PFM switching control circuit, when the load current is bigger, the conversion output is controlled by the methods of fixing the frequency and adjusting the clock duty ratio, when the smaller load current appears, the conversion output is controlled by the methods of fixing the conducting time and adjusting the clock frequency, thereby ensuring that the high conversion efficiency is obtained under full load condition. The utility model is suitable for power supply management of various portable electronic products.
Description
Technical field
The utility model relates to the DC/DC transducer, is specifically related to adopt the high frequency efficient of the PFM/PWM mixed mode control DC/DC transducer that boosts.
Background technology
The DC/DC transducer is a kind ofly unsettled DC power supply is transformed into a kind of stable needed DC power supply comes electronic installation to power electronic equipment.The internal control mode of DC/DC transducer comprises PWM control (pulse width modulation) and PFM control (pulse frequency modulated) two kinds of mode of operations from principle.Usually, the PWM mode of operation more can guarantee stability and the high conversion rate exported under the heavy load situation, and the PFM mode of operation then shows better under the situation of little load.The general a kind of method that adopts wherein of traditional DC/DC transducer can not well solve the efficiency under different loads.The utility model adopts a kind of PFM/PWM mixed mode control mode of uniqueness, and it is all very high well to have solved under full load efficient.
Traditional DC/DC transducer all relies on the control master chip usually, and it is external to adjust pipe/power output tube, takes the multicore sheet to mix mode integrated or that the thick film secondary is integrated and assembles and form, and volume is big, conversion efficiency is low, production and processing and debug complexity.The utility model relies on advanced semiconductor integrated circuit processing technology, and the DC/DC transducer with realized with the secondary integration mode in the past takes the lead in realizing with the integrated mode of single-chip at home.Multinomial technical parameters such as the conversion efficiency of DC/DC transducer, switching frequency have reached the technical indicator of external like product.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of high frequency efficient that adopts unique PFM/PWM mixed mode control mode to realize DC/DC transducer that boosts.
In order to solve the problems of the technologies described above; a technical scheme of the present utility model is; a kind of high frequency efficient DC/DC transducer that boosts is provided; comprise voltage reference source circuit, error amplifier, current detection circuit, current error operational amplifier, PWM comparator, oscillating circuit, overvoltage and current foldback circuit, logic control circuit, high-end tubes drive circuit, low side tube drive circuit, wherein:
The input connecting circuit Enable Pin of voltage reference source circuit, an output of voltage reference source circuit connects an input of error amplifier, another input of error amplifier connects by resistance R 1, the bleeder circuit that R2 forms, the output of error amplifier connects an input of current error operational amplifier, another input of current error operational amplifier connects the output of current detection circuit, the output of current error operational amplifier connects an input of PWM comparator, another input of PWM comparator connects the output of oscillating circuit, the output of PWM comparator connects an input of logic control circuit, another input of logic control circuit connects the output of overvoltage and current foldback circuit, the output of logic control circuit connects high-end tubes drive circuit and low side tube drive circuit respectively, the output of high-end tubes drive circuit connects synchronous rectifier T1, and the output of low side tube drive circuit connects power adjustment pipe T2; Be characterized in: the input of PWM/PFM control switching circuit connects the output of voltage reference source circuit and current error operational amplifier respectively, and the output of PWM/PFM control switching circuit connects the control end of oscillating circuit.Utilize PWM/PFM control commutation circuit, when load current is big, method by fixed frequency, adjusting clock duty cycle is changed output control, when less load current, then control, guaranteed to obtain high conversion efficiency under the full load condition by fixing ON time, the method for regulating clock frequency.
According to a preferred version of the present utility model, between the output of current error operational amplifier and ground, be connected an active capacitor compensating circuit, the active capacitor frequency compensation technique guarantee loop stability of DC/DC transducer.
According to a preferred version of the present utility model, described PWM/PFM control switching circuit is made up of PFM comparator and Pulse-trigger control device, an input of described PFM comparator connects an output of voltage reference source circuit, another input of PFM comparator connects the output of current error operational amplifier, the output of PFM comparator connects the input that pulse triggers controller, and pulse triggers the control end of the output connection oscillating circuit of controller.
According to a preferred version of the present utility model, described active capacitor compensating circuit is by resistance R 3, R4, R5, R6, building-out capacitor C1, C2, operational amplifier is formed, wherein, resistance R 3, R4, the R5 series connection, one end of resistance R 3 connects the output of current error operational amplifier, one end ground connection of resistance R 5, the in-phase input end of operational amplifier is connected resistance R 3, on the connected node of R4, the inverting input of operational amplifier is connected resistance R 4, on the connected node of R5, be connected resistance R 6 between the inverting input of operational amplifier and the output, the output of operational amplifier is by building-out capacitor C2 ground connection.
According to a preferred version of the present utility model; described logic control circuit by with door CD1; CD3; CD4; NAND gate CD2 forms; a described input with door CD1 is connected the output of overvoltage and current foldback circuit; another input connecting circuit Enable Pin with door CD1; with the output of door CD1 be connected respectively NAND gate CD2 input and with the input of door CD4; the output of NAND gate CD2 connects an input with door CD3; with another input of door CD4 be connected the output of PWM comparator simultaneously with the input of door CD3; be connected the high-end tubes drive circuit with the output of door CD3, be connected the low side tube drive circuit with the output of door CD4.
According to a preferred version of the present utility model, described synchronous rectifier T1 and power adjustment pipe T2 are integrated in control chip inside, and make the conducting resistance of synchronous adjustment pipe very little, when power adjustment pipe T2 closes, utilize it to continue the loop of electric current, thereby reduce energy loss, improved the efficient of whole transducer, further reduce system simultaneously and use volume.
The boost beneficial effect of DC/DC transducer of high frequency efficient described in the utility model is, the utility model adopts a kind of PFM/PWM mixed mode control mode of uniqueness, guaranteed to obtain high conversion efficiency under the full load condition, realize the stable of whole loop at the integrated active capacitor frequency compensation of DC/DC converter inside, simultaneously, the DC/DC converter inside is integrated synchronous rectifier, further improve the volume that conversion efficiency has reduced system again, DC/DC converter efficiency height of the present utility model, volume are little, are suitable for the power management of various portable type electronic products.
Description of drawings
Fig. 1 is the boost theory diagram of DC/DC transducer of high frequency efficient described in the utility model.
Fig. 2 is the theory diagram of PWM/PFM control switching circuit 12 described in the utility model.
Fig. 3 is the theory diagram that pulse described in the utility model triggers controller 14.
Fig. 4 is the theory diagram of active capacitor compensating circuit 5 described in the utility model.
Embodiment
Referring to Fig. 1, a kind of high frequency efficient described in the utility model DC/DC transducer that boosts, by voltage reference source circuit 1, error amplifier 2, current detection circuit 3, current error operational amplifier 4, active capacitor compensating circuit 5, PWM comparator 6, oscillating circuit 7, overvoltage and current foldback circuit 8, logic control circuit 9, high-end tubes drive circuit 10, low side tube drive circuit 11, PWM/PFM controls commutation circuit 12, synchronous rectifier T1, power adjustment pipe T2 constitutes, wherein: the input connecting circuit Enable Pin of voltage reference source circuit 1, an output of voltage reference source circuit 1 connects the in-phase input end of error amplifier 2, the inverting input of error amplifier 2 connects by resistance R 1, the bleeder circuit that R2 forms, the output of error amplifier 2 connects the inverting input of current error operational amplifier 4, the in-phase input end of current error operational amplifier 4 connects the output of current detection circuit 3, between the output of current error operational amplifier 4 and ground, be connected active capacitor compensating circuit 5, simultaneously, the output of current error operational amplifier 4 connects the inverting input of PWM comparator 6, the in-phase input end of PWM comparator 6 connects the output of oscillating circuit 7, the output of PWM comparator 6 connects an input of logic control circuit 9, another input of logic control circuit 9 connects the output of overvoltage and current foldback circuit 8, the output of logic control circuit 9 connects high-end tubes drive circuit 10 and low side tube drive circuit 11 respectively, the output of high-end tubes drive circuit 10 connects synchronous rectifier T1, and the output of low side tube drive circuit 11 connects power adjustment pipe T2; The input of PWM/PFM control switching circuit 12 connects the output of voltage reference source circuit 1 and current error operational amplifier 4 respectively, and the output of PWM/PFM control switching circuit 12 connects the control end of oscillating circuit 7.Simultaneously, described synchronous rectifier T1 and power adjustment pipe T2 are integrated in control chip inside, the input of PWM/PFM control commutation circuit 12 connects the output of reference source circuit and current error operational amplifier 4 respectively, and the output of PWM/PFM control commutation circuit 12 connects oscillator 7.
Described logic control circuit 9 by with door CD1; CD3; CD4; NAND gate CD2 forms; described input A1 with door CD1 is connected the output of overvoltage and current foldback circuit 8; another input B1 connecting circuit Enable Pin with door CD1; with the output of door CD1 be connected simultaneously NAND gate CD2 input and with the input B4 of door CD4; the output of NAND gate CD2 connects the input B3 with door CD3; with the input A4 of door CD4 be connected the output of PWM comparator 6 simultaneously with the input A3 of door CD3; be connected high-end tubes drive circuit 10 with the output of door CD3, be connected low side tube drive circuit 11 with the output of door CD4.
Referring to Fig. 2, the high frequency efficient described in the utility model DC/DC transducer that boosts, described PWM/PFM control switching circuit 12 is made up of PFM comparator 13 and Pulse-trigger control device 14, an input of described PFM comparator 13 connects an output of voltage reference source circuit 1, another input of PFM comparator 13 connects the output of current error operational amplifier 4, the output of PFM comparator 13 connects the input that pulse triggers controller 14, and pulse triggers the control end of the output connection oscillating circuit 7 of controller 14.Fig. 3 has provided the concrete forming circuit that pulse triggers controller 14, and it is that a switching signal produces circuit that pulse triggers controller 14, is controlling the switching of PWM/PFM pattern jointly with PFM comparator 13.When converter was operated in the PFM pattern, controller had guaranteed that oscillating circuit only produces a triangular pulse in each cycle.
Referring to Fig. 4, the high frequency efficient described in the utility model DC/DC transducer that boosts, described active capacitor compensating circuit 5 is by resistance R 3, R4, R5, R6, capacitor C 1, C2, operational amplifier 15 is formed, wherein, capacitor C 1 is the building-out capacitor of the error amplifier of operational amplifier 15 and internal capacitance formation, resistance R 3, R4, the R5 series connection, one end of resistance R 3 connects the output of current error operational amplifier 4, one end ground connection of resistance R 5, the in-phase input end of operational amplifier 15 is connected resistance R 3, on the connected node of R4, the inverting input of operational amplifier 15 is connected resistance R 4, on the connected node of R5, be connected resistance R 6 between the inverting input of operational amplifier 15 and the output, the output of operational amplifier 15 is by capacitor C 2 ground connection.Operational amplifier 15 among Fig. 4 is realized its amplification, and the active capacitor load C 1 of the error amplifier that amplifier and internal capacitance constitute plays frequency compensated effect.
The boost operation principle of DC/DC transducer of high frequency efficient described in the utility model is: behind chip power, the oscillating circuit and the internal reference that are positioned at chip internal are at first started working, this moment, the output voltage and the inductive current of transducer were zero, the output voltage of transducer is through resistance R 1, R2 dividing potential drop feedback error originated from input amplifier 2, error amplifier 2 carries out error with the deviation between feedback voltage and the inner accurate reference voltage and amplifies, the output signal on the output of error amplifier 2 and current detecting road 3 is by behind the current error operational amplifier 4, its result imports PWM comparator 6, at inner PWM/PFM control switching circuit 13, under the effect of oscillating circuit 7, finish the switching of transducer PWM/PFM pattern control, realize that the DC/DC transducer is stable, voltage output efficiently.
For the DC/DC transducer, transducer is operated in CCM (continuous current pattern) or DCM (interrupted current pattern) the filter inductance numerical value decision by the border:
The filter inductance Lcritical=on border (1-D) R/2fsw
Wherein, D is a duty ratio, and R is load, and fsw is a switching frequency.
Under the heavy duty condition, the DC/DC transducer is operated in the PWM pattern, when external inductance satisfies greater than the filter inductance on border, then converter is operated under the CCM pattern, during stable state, and the branch pressure voltage VFB＜Vref of resistance R 2, Eout/VrampP2P=D, wherein, Eout is the output of error amplifier, and VrampP2P is the output amplitude of oscillating circuit; Along with load reduction, the resistance value that is load becomes big, it is big that the filter inductance numerical value on border becomes, but this moment, external inductance still satisfied the filter inductance greater than the border, because the negative resistance charactertistic of DC/DC transducer, output voltage VO UT raises, the branch pressure voltage VFB of resistance R 2 raises, and the output voltage V Eout of error amplifier 2 reduces, and makes duty ratio D reduce.When load further reduces, make external inductance less than filter inductance Lcritical, the DC/DC transducer enters the DCM mode of operation, and the dividing potential drop VFB of resistance R 2 raises, and the output voltage V Eout of error amplifier 2 reduces, and duty ratio D reduces; As the output voltage V Eout of error amplifier 2 during less than PFM comparator 13 reference voltage Vpfm, PFM comparator 13 output high level, trigger controller 14 through a pulse and remove to turn-off oscillating circuit 7, this moment, oscillating circuit 7 outputs remained on high level, make the branch pressure voltage VFB of resistance R 2 reduce, the output voltage V Eout of error amplifier 2 raises; When VEout＞Vpfm, PFM comparator 13 output low levels trigger enable signal of controller 14 generations through pulse and remove to restart oscillating circuit 7, the output voltage V Eout of error amplifier 2 is reduced, repeat said process, promptly be equivalent to the PFM mode of operation.The fixedly opening time of PFM is by the reference voltage Vpfm decision of PFM comparator.Therefore guaranteed that the DC/DC transducer is operated in the CCM pattern when heavy duty, its modulation system is typical pwm pattern; And the DC/DC transducer is operated in the DCM pattern when underload, and its modulation system is typical PFM control model.
Claims (6)
1. high frequency efficient DC/DC transducer that boosts; comprise voltage reference source circuit (1), error amplifier (2), current detection circuit (3), current error operational amplifier (4), PWM comparator (6), oscillating circuit (7), overvoltage and current foldback circuit (8), logic control circuit (9), high-end tubes drive circuit (10), low side tube drive circuit (11), wherein:
The input connecting circuit Enable Pin of voltage reference source circuit (1), an output of voltage reference source circuit (1) connects an input of error amplifier (2), another input of error amplifier (2) connects by resistance R 1, the bleeder circuit that R2 forms, the output of error amplifier (2) connects an input of current error operational amplifier (4), another input of current error operational amplifier (4) connects the output of current detection circuit (3), the output of current error operational amplifier (4) connects an input of PWM comparator (6), another input of PWM comparator (6) connects the output of oscillating circuit (7), the output of PWM comparator (6) connects an input of logic control circuit (9), another input of logic control circuit (9) connects the output of overvoltage and current foldback circuit (8), the output of logic control circuit (9) connects high-end tubes drive circuit (10) and low side tube drive circuit (11) respectively, the output of high-end tubes drive circuit (10) connects synchronous rectifier T1, and the output of low side tube drive circuit (11) connects power adjustment pipe T2;
It is characterized in that: the input of PWM/PFM control switching circuit (12) connects the output of voltage reference source circuit (1) and current error operational amplifier (4) respectively, and the output of PWM/PFM control switching circuit (12) connects the control end of oscillating circuit (7).
2. the high frequency efficient according to claim 1 DC/DC transducer that boosts is characterized in that: be connected an active capacitor compensating circuit (5) between the output of current error operational amplifier (4) and ground.
3. the high frequency efficient according to claim 2 DC/DC transducer that boosts, it is characterized in that: PWM/PFM control switching circuit (12) triggers controller (14) by PFM comparator (13) and pulse and forms, an input of described PFM comparator (13) connects an output (1) of voltage reference source circuit, another input of PFM comparator (13) connects the output of current error operational amplifier (4), the output of PFM comparator (13) connects the input that pulse triggers controller (14), and pulse triggers the control end of the output connection oscillating circuit (7) of controller (14).
4. the high frequency efficient according to claim 3 DC/DC transducer that boosts, it is characterized in that: described active capacitor compensating circuit (5) is by resistance R 3, R4, R5, R6, building-out capacitor C1, C2, operational amplifier (15) is formed, wherein, resistance R 3, R4, the R5 series connection, one end of resistance R 3 connects the output of current error operational amplifier (4), one end ground connection of resistance R 5, the in-phase input end of operational amplifier (15) is connected resistance R 3, on the connected node of R4, the inverting input of operational amplifier (15) is connected resistance R 4, on the connected node of R5, be connected resistance R 6 between the inverting input of operational amplifier (15) and the output, the output of operational amplifier (15) is by building-out capacitor C2 ground connection.
5. according to claim 1 or 2 or the 3 or 4 described high frequency efficients DC/DC transducer that boosts; it is characterized in that: described logic control circuit (9) by with door CD1; CD3; CD4; NAND gate CD2 forms; a described input (A1) with door CD1 is connected the output of overvoltage and current foldback circuit (8); another input (B1) connecting circuit Enable Pin with door CD1; with the output of door CD1 be connected simultaneously NAND gate CD2 input and with the input (B4) of door CD4; the output of NAND gate CD2 connects the input (B3) with door CD3; with the input (A4) of door CD4 be connected the output of PWM comparator (6) simultaneously with the input (A3) of door CD3; be connected high-end tubes drive circuit (10) with the output of door CD3, be connected low side tube drive circuit (11) with the output of door CD4.
6. the high frequency efficient according to claim 5 DC/DC transducer that boosts, it is characterized in that: described synchronous rectifier T1 and power adjustment pipe T2 are integrated in control chip inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201248669U CN201063541Y (en) | 2007-07-30 | 2007-07-30 | High-frequency highly effective boosting DC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201248669U CN201063541Y (en) | 2007-07-30 | 2007-07-30 | High-frequency highly effective boosting DC/DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201063541Y true CN201063541Y (en) | 2008-05-21 |
Family
ID=39451927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201248669U Expired - Fee Related CN201063541Y (en) | 2007-07-30 | 2007-07-30 | High-frequency highly effective boosting DC/DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201063541Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976945A (en) * | 2010-11-02 | 2011-02-16 | 深圳市富满电子有限公司南山分公司 | Switch type buck regulator circuit |
| CN102035181A (en) * | 2010-11-16 | 2011-04-27 | 中国电子科技集团公司第五十八研究所 | Overcurrent and overvoltage protection circuit in switch power supply |
| CN102195484A (en) * | 2010-03-18 | 2011-09-21 | 联想(北京)有限公司 | Switching power supply frequency adjusting method and control device for switching power supply |
| CN102208800A (en) * | 2011-06-09 | 2011-10-05 | 国网电力科学研究院 | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function |
| CN102255526A (en) * | 2011-06-23 | 2011-11-23 | 深圳市富满电子有限公司南山分公司 | AC-DC power supply conversion chip and power switching circuit |
| CN102307003A (en) * | 2011-09-14 | 2012-01-04 | 深圳航天科技创新研究院 | Insulation driving circuit of power switching tube |
| CN101466187B (en) * | 2009-01-05 | 2012-06-27 | 西安理工大学 | LED drive circuit for PFM/PWM bimodal switch light modulation |
| CN102868297A (en) * | 2012-09-20 | 2013-01-09 | 电子科技大学 | Deadline-fixed PFM (pulse frequency modulation) mode switching power supply controller |
| CN103078478A (en) * | 2013-01-23 | 2013-05-01 | 成都启臣微电子有限公司 | Controller for switching power supply and switching power supply |
| CN101783586B (en) * | 2009-01-19 | 2013-06-19 | 成都芯源系统有限公司 | Control circuit for constant on-time converting circuit and method thereof |
| CN105634277A (en) * | 2016-02-14 | 2016-06-01 | 山东超越数控电子有限公司 | Power supply control method for improving transient state response performance of point-of-load power supply |
| CN107769556A (en) * | 2017-11-01 | 2018-03-06 | 广州金升阳科技有限公司 | Synchronous rectification BOOST converter, synchronous commutating control circuit and method |
| CN113852282A (en) * | 2021-09-18 | 2021-12-28 | 无锡裕芯电子科技有限公司 | Control circuit of DC/DC boosting system |
| CN113917228A (en) * | 2021-09-30 | 2022-01-11 | 北京维普无限智能技术有限公司 | DC-DC conversion circuit-oriented work efficiency detection circuit and detection method |
| WO2024244131A1 (en) * | 2023-06-02 | 2024-12-05 | 云南电网有限责任公司红河供电局 | Generating device for converting low-voltage direct current into 20 kv high-voltage direct current |
-
2007
- 2007-07-30 CN CNU2007201248669U patent/CN201063541Y/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101466187B (en) * | 2009-01-05 | 2012-06-27 | 西安理工大学 | LED drive circuit for PFM/PWM bimodal switch light modulation |
| CN101783586B (en) * | 2009-01-19 | 2013-06-19 | 成都芯源系统有限公司 | Control circuit for constant on-time converting circuit and method thereof |
| CN102195484A (en) * | 2010-03-18 | 2011-09-21 | 联想(北京)有限公司 | Switching power supply frequency adjusting method and control device for switching power supply |
| WO2011113299A1 (en) * | 2010-03-18 | 2011-09-22 | 联想(北京)有限公司 | Method and device for regulating frequency of switching power supply |
| CN101976945A (en) * | 2010-11-02 | 2011-02-16 | 深圳市富满电子有限公司南山分公司 | Switch type buck regulator circuit |
| CN102035181A (en) * | 2010-11-16 | 2011-04-27 | 中国电子科技集团公司第五十八研究所 | Overcurrent and overvoltage protection circuit in switch power supply |
| CN102035181B (en) * | 2010-11-16 | 2013-07-03 | 中国电子科技集团公司第五十八研究所 | Overcurrent and overvoltage protection circuit in switch power supply |
| CN102208800A (en) * | 2011-06-09 | 2011-10-05 | 国网电力科学研究院 | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function |
| CN102208800B (en) * | 2011-06-09 | 2014-04-30 | 国网电力科学研究院 | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function |
| CN102255526A (en) * | 2011-06-23 | 2011-11-23 | 深圳市富满电子有限公司南山分公司 | AC-DC power supply conversion chip and power switching circuit |
| CN102307003A (en) * | 2011-09-14 | 2012-01-04 | 深圳航天科技创新研究院 | Insulation driving circuit of power switching tube |
| CN102868297A (en) * | 2012-09-20 | 2013-01-09 | 电子科技大学 | Deadline-fixed PFM (pulse frequency modulation) mode switching power supply controller |
| CN102868297B (en) * | 2012-09-20 | 2014-09-10 | 电子科技大学 | Deadline-fixed PFM (pulse frequency modulation) mode switching power supply controller |
| CN103078478A (en) * | 2013-01-23 | 2013-05-01 | 成都启臣微电子有限公司 | Controller for switching power supply and switching power supply |
| CN103078478B (en) * | 2013-01-23 | 2015-06-03 | 成都启臣微电子有限公司 | Controller for switching power supply and switching power supply |
| CN105634277A (en) * | 2016-02-14 | 2016-06-01 | 山东超越数控电子有限公司 | Power supply control method for improving transient state response performance of point-of-load power supply |
| CN107769556A (en) * | 2017-11-01 | 2018-03-06 | 广州金升阳科技有限公司 | Synchronous rectification BOOST converter, synchronous commutating control circuit and method |
| CN113852282A (en) * | 2021-09-18 | 2021-12-28 | 无锡裕芯电子科技有限公司 | Control circuit of DC/DC boosting system |
| CN113917228A (en) * | 2021-09-30 | 2022-01-11 | 北京维普无限智能技术有限公司 | DC-DC conversion circuit-oriented work efficiency detection circuit and detection method |
| WO2024244131A1 (en) * | 2023-06-02 | 2024-12-05 | 云南电网有限责任公司红河供电局 | Generating device for converting low-voltage direct current into 20 kv high-voltage direct current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201063541Y (en) | High-frequency highly effective boosting DC/DC converter | |
| CN101459381B (en) | A control device and control method for a Boost switching converter | |
| CN103702486A (en) | LED driving circuit system, control circuit and control method | |
| CN104600983A (en) | Step-up and step-down switch power converter, control circuit and mode switching control unit | |
| CN102468741A (en) | rectifier circuit | |
| KR102175887B1 (en) | Pfc control circuit, active pfc circuit and method for controlling pfc | |
| CN101546961A (en) | Method and apparatus for AC to DC power conversion with reduced harmonic current | |
| US20050152160A1 (en) | Switching-type power converter | |
| Brunoro et al. | A high-performance ZVS full-bridge DC-DC 0-50-V/0-10-A power supply with phase-shift control | |
| CN110912405A (en) | Four-switch buck-boost converter based on voltage mode control | |
| CN105790580A (en) | Power source system and inductive current peak control method | |
| CN103368394A (en) | Efficient step-down DC-DC (Direct Current-Direct Current) converter | |
| CN107147291A (en) | A non-isolated soft-switching high step-up ratio DC converter and method thereof | |
| CN111224555B (en) | Wide-range output control method of LLC resonant conversion circuit | |
| CN113541490A (en) | Interleaved bidirectional Buck/Boost circuit soft switch PWM-PFM control system and control method | |
| CN115642805B (en) | ZVS-based six-switch buck-boost converter | |
| Rezazade et al. | Analysis of PFC improvement and THD reduction achieved by PFC-based zeta converter and PWM-rectifier | |
| CN204119031U (en) | A kind of high-power low-loss current mode booster circuit | |
| CN101404443B (en) | Carrier generator and pulse-width modulator eand boosting type converter employing the same | |
| CN114944748A (en) | Constant frequency control circuit and method for constant on-time control mode converter | |
| CN115276401A (en) | Non-isolated partial power bidirectional direct current converter | |
| CN106059300B (en) | A kind of voltage changer based on pulse over-cycle phase width modulated mode | |
| CN108712070A (en) | Based on ZCS PWM bi-directional DC-DC CUK converters, transformation system and method | |
| CN112600422A (en) | Leading adjustable boost circuit of pulse power supply for electrostatic precipitator | |
| CN107070218B (en) | High-power soft switch chopper circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080521 Termination date: 20100730 |