WO2012109783A1 - Convertisseur cc/cc amplificateur isolé - Google Patents

Convertisseur cc/cc amplificateur isolé Download PDF

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Publication number
WO2012109783A1
WO2012109783A1 PCT/CN2011/070969 CN2011070969W WO2012109783A1 WO 2012109783 A1 WO2012109783 A1 WO 2012109783A1 CN 2011070969 W CN2011070969 W CN 2011070969W WO 2012109783 A1 WO2012109783 A1 WO 2012109783A1
Authority
WO
WIPO (PCT)
Prior art keywords
inductor
transformer
coupled
voltage
converter
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.)
Ceased
Application number
PCT/CN2011/070969
Other languages
English (en)
Inventor
Wenguang Wang
Long YU (Robin)
Xiaodong Zhan (David)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intersil Corp
Intersil Americas LLC
Original Assignee
Intersil Americas LLC
Intersil Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Intersil Americas LLC, Intersil Inc filed Critical Intersil Americas LLC
Priority to PCT/CN2011/070969 priority Critical patent/WO2012109783A1/fr
Publication of WO2012109783A1 publication Critical patent/WO2012109783A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3376—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
    • H02M3/3378—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type

Definitions

  • Figure 1 is a schematic diagram of a DC/DC converter according to one embodiment of the present invention.
  • Figs. 2A-F are timing diagrams for the operation of a DC/DC converter according to one embodiment of the present invention.
  • FIG. 3 is a block diagram of one embodiment of a system including a DC/DC converter according to one embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a DC/DC converter, indicated generally at 100, and constructed according to one embodiment of the present invention.
  • Converter 100 is a boost converter in that the DC output voltage (V ou t) is proportional to 1/(1 -D) (D is the on-state duty cycle of both Ql and Q2) and maybe smaller or greater than the DC input voltage (Vi N ) depending on the transformer turns ratio.
  • converter 100 also implements isolation by including a transformer Tl interposed between input voltage V I N and output voltage VOU T .
  • Converter 100 operates in current feed mode. Input voltage V I N is applied at input node 102. Converter 100 also includes inductor LI . Inductor LI has a first end coupled to node 102 and a second end coupled to node 104. In this manner, current from input voltage V IN is provided to inductor LI during operation of converter 100.
  • Transformer Tl has a primary side with primary windings 106A and 106B and a secondary side with secondary windings 108A and 108B.
  • the primary windings 106A and 106B are connected to a center tap.
  • the center tap of the primary windings 106 A and 106B is coupled to node 104.
  • the center tap of secondary windings 108A and 108B is coupled to node 110.
  • Controller 112 is coupled to first and second switches Ql and Q2. Controller 112 receives an error signal from the output voltage and/or current feedback and regulation circuit 120 through the isolation barrier 122 to provide PWM control to Ql and Q2 and keep the output voltage or current in regulation.
  • the switches Ql and Q2 are implemented as field effect transistors (FETs).
  • FETs field effect transistors
  • Switch Ql is coupled between primary winding 106A and node 118.
  • node 118 is coupled to ground potential.
  • Switch Q2 is coupled between primary winding 106B and node 118. Switches Ql and Q2 are controlled by control signals V G1 and V G2 , respectively.
  • Converter 100 also includes output rectifier circuit 114 that provides the DC output voltage to a load represented by resistor R2.
  • Output rectifier circuit 114 is coupled to secondary windings 108A and 108B of transformer Tl .
  • Output circuit 114 includes first and second diodes D3 and D4.
  • Diode D3 is coupled between secondary winding 108 A and output node 116.
  • Diode D3 is coupled between secondary winding 108B and output node 116.
  • Output circuit 114 further includes an output capacitor C3 coupled between output node 116 and node 110. It is noted that in one embodiment, node 110 is coupled to ground potential.
  • converter 100 The operation of converter 100 is described with reference to timing diagrams in Figures 2A-2F.
  • the operation is described in four phases or time periods. It is understood that during operation, these four time periods are repeated, as necessary, for a particular implementation. Further, the four time periods are established by controlling the duty cycle and phase of the switches Ql and Q2. In one embodiment, the duty cycle of each switch is set at a level greater than 50 percent. Further, the switches Ql and Q2 are switched at the same frequency and 180 degrees out-of-phase. In this manner, inductor LI is enabled to alternate between storing energy during one time period and passing energy through transformer Tl to output node 116 during a subsequent time period as explained in more detail below.
  • the voltage across primary windings 106A and 106B is also brought to a low voltage level, e.g., 0 volts, during this time period.
  • transformer Tl With both switches Ql and Q2 turned on at the same time, transformer Tl is effectively shorted out, e.g., from t 0 to ti.
  • the current in inductor LI increases (Fig. 2E).
  • the inductor receives the current from the input DC voltage, V IN , and stores energy in inductor LI .
  • controller 112 turns off switch Q2 by reducing control signal V G2 to a low voltage level, e.g., 0 volts as shown in Fig. 2B.
  • a conduction path is formed such that current passes from inductor LI (Fig. 2E) through primary winding 106 A and switch Ql .
  • This further causes a current in secondary winding 108B of transformer Tl based on the turns ratio of secondary winding 108B to primary winding 106 A.
  • the output capacitor C3 is charged through diode D4 to provide the desired output voltage V OUT at node 116.
  • the output voltage is calculated according to the following equation:
  • V ou t is the output voltage at node 116
  • V IN is the voltage applied to inductor LI
  • D is the on-state duty cycle of switches Ql and Q2, i.e., the time interval between t 0 and ti divided by the time interval between to and t 3 ⁇ 4 or the time interval between t 2 and t 3 divided by the time interval between t 2 and t*, shown in Fig. 2
  • n is the turns ratio, e.g., the ratio of the number of turns in the secondary side (108A or 108B) to the number of turns in the primary side (106A or 106B).
  • the converter releases the stored energy through primary winding 106B of transformer Tl to the output circuit 114. This is accomplished by turning off switch Ql .
  • controller 112 reduces the voltage VG I to a low level, e.g., 0 Volts. This creates a conduction path from inductor LI to discharge current (Fig. 2E) through primary winding 106B and switch Q2. This further causes a current in secondary winding 108 A based on the turns ratio between secondary winding 108 A to primary winding 106B.
  • the output capacitor C3 is charged through diode D3 to provide the desired output voltage V OUT at node 116.
  • the voltage, V OUT is calculated according to equation (1) above.
  • controller 100 periodically repeats these four time periods to alternate between storing and releasing energy in and from inductor LI through transformer Tl and output circuit 114.
  • diodes Dl and D2 resistor Rl and capacitor CI are used to absorb the energy in the inductor LI and the Tl leakage inductance during shut down or other conditions when Ql and Q2 are both off during the same time period.
  • FIG. 3 is a block diagram of one embodiment of a system, indicated generally at 300, and including a DC/DC converter 302 according to one embodiment of the present invention.
  • Converter 302 comprises a boost DC/DC converter with an isolating transformer.
  • the converter 302 is constructed as described above with respect to Figs. 1, and 2A- 2F.
  • Converter 302 converts a DC voltage provided by power source 306 to a functional circuit 304.
  • functional circuit 304 comprises one or multiple strings of LEDs for commercial or residential lighting.
  • functional circuit 304 comprises any appropriate electronic circuit, e.g., a microprocessor, memory, circuit board, or the like.
  • Converter 302 includes an inductor configured to store and release energy from the power source 306 for the functional circuit 304. Further, converter 302 includes an isolation transformer that forces the inductor to store energy during one phase of operation and to pass energy from the inductor and the power source through the transformer to the functional circuit 304 during a second phase of operation.
  • Embodiments of the methods described above can be implemented in a DC/DC converter for telecommunication, computing, automotive and consumer applications.
  • a number of embodiments of the invention defined by the following claims have been described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un convertisseur CC/CC (100) qui comprend un inducteur (L1) ayant une première extrémité et une deuxième extrémité, et un transformateur (T1) ayant un côté primaire et un côté secondaire. La première extrémité est conçue pour recevoir une tension d'entrée (VIN). Le côté primaire a un premier enroulement primaire (106A) et un deuxième enroulement primaire (106B). Le premier enroulement primaire (106A) et le deuxième enroulement primaire (106B) ont chacun une première extrémité couplée à la deuxième extrémité de l'inducteur (L1), chacun ayant une deuxième extrémité respective. Un premier commutateur (Q1) est couplé à la deuxième extrémité du premier enroulement primaire (106A), et un deuxième commutateur (Q2) est couplé à la deuxième extrémité du deuxième enroulement primaire (106B). Un circuit de sortie est couplé au côté secondaire du transformateur (T1). Les premier et deuxième commutateurs sont mis en marche et à l'arrêt pendant des périodes sélectionnées de sorte que l'énergie soit emmagasinée dans l'inducteur (L1) puis passée par le transformateur (T1) au circuit de sortie pour produire une tension de sortie amplifiée (VOUT).
PCT/CN2011/070969 2011-02-14 2011-02-14 Convertisseur cc/cc amplificateur isolé Ceased WO2012109783A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/070969 WO2012109783A1 (fr) 2011-02-14 2011-02-14 Convertisseur cc/cc amplificateur isolé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/070969 WO2012109783A1 (fr) 2011-02-14 2011-02-14 Convertisseur cc/cc amplificateur isolé

Publications (1)

Publication Number Publication Date
WO2012109783A1 true WO2012109783A1 (fr) 2012-08-23

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WO (1) WO2012109783A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016044497A1 (fr) * 2014-09-19 2016-03-24 Alpha And Omega Semiconductor (Cayman ) Ltd. Commande de temps de marche constant (cot) dans un convertisseur isolé
TWI565207B (zh) * 2016-01-19 2017-01-01 國立臺北科技大學 隔離型高升壓直流-直流轉換器
US9548667B2 (en) 2014-09-12 2017-01-17 Alpha And Omega Semiconductor (Cayman) Ltd. Constant on-time (COT) control in isolated converter
US9577542B2 (en) 2014-09-12 2017-02-21 Alpha & Omega Semiconductor (Cayman), Ltd. Constant on-time (COT) control in isolated converter
US9577543B2 (en) 2014-09-12 2017-02-21 Alpha & Omega Semiconductor (Cayman), Ltd. Constant on time (COT) control in isolated converter
US9954455B2 (en) 2014-09-12 2018-04-24 Alpha And Omega Semiconductor (Cayman) Ltd. Constant on time COT control in isolated converter
US10270353B2 (en) 2014-09-12 2019-04-23 Alpha And Omega Semiconductor (Cayman) Ltd. Constant on-time (COT) control in isolated converter
CN113922489A (zh) * 2021-09-10 2022-01-11 航天时代飞鹏有限公司 一种板载u盘的供电电路

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5654881A (en) * 1996-03-01 1997-08-05 Lockheed Martin Corporation Extended range DC-DC power converter circuit
JP2004147436A (ja) * 2002-10-24 2004-05-20 Sanken Electric Co Ltd Ｄｃ−ｄｃコンバータ
JP2007312464A (ja) * 2006-05-16 2007-11-29 Kikusui Electr0Nics Corp Ｄｃ−ｄｃコンバータ
CN101478253A (zh) * 2009-01-23 2009-07-08 华南理工大学 一种单相升压推挽逆变电路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5654881A (en) * 1996-03-01 1997-08-05 Lockheed Martin Corporation Extended range DC-DC power converter circuit
JP2004147436A (ja) * 2002-10-24 2004-05-20 Sanken Electric Co Ltd Ｄｃ−ｄｃコンバータ
JP2007312464A (ja) * 2006-05-16 2007-11-29 Kikusui Electr0Nics Corp Ｄｃ−ｄｃコンバータ
CN101478253A (zh) * 2009-01-23 2009-07-08 华南理工大学 一种单相升压推挽逆变电路

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9548667B2 (en) 2014-09-12 2017-01-17 Alpha And Omega Semiconductor (Cayman) Ltd. Constant on-time (COT) control in isolated converter
US9577542B2 (en) 2014-09-12 2017-02-21 Alpha & Omega Semiconductor (Cayman), Ltd. Constant on-time (COT) control in isolated converter
US9577543B2 (en) 2014-09-12 2017-02-21 Alpha & Omega Semiconductor (Cayman), Ltd. Constant on time (COT) control in isolated converter
US9954455B2 (en) 2014-09-12 2018-04-24 Alpha And Omega Semiconductor (Cayman) Ltd. Constant on time COT control in isolated converter
US10270353B2 (en) 2014-09-12 2019-04-23 Alpha And Omega Semiconductor (Cayman) Ltd. Constant on-time (COT) control in isolated converter
WO2016044497A1 (fr) * 2014-09-19 2016-03-24 Alpha And Omega Semiconductor (Cayman ) Ltd. Commande de temps de marche constant (cot) dans un convertisseur isolé
TWI565207B (zh) * 2016-01-19 2017-01-01 國立臺北科技大學 隔離型高升壓直流-直流轉換器
CN113922489A (zh) * 2021-09-10 2022-01-11 航天时代飞鹏有限公司 一种板载u盘的供电电路

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