WO2008020386A1 - Amplificateur de puissance - Google Patents

Amplificateur de puissance Download PDF

Info

Publication number
WO2008020386A1
WO2008020386A1 PCT/IB2007/053193 IB2007053193W WO2008020386A1 WO 2008020386 A1 WO2008020386 A1 WO 2008020386A1 IB 2007053193 W IB2007053193 W IB 2007053193W WO 2008020386 A1 WO2008020386 A1 WO 2008020386A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
power amplifier
coupled
transistor
current
Prior art date
Application number
PCT/IB2007/053193
Other languages
English (en)
Inventor
Gertjan Van Holland
Pieter Buitendijk
Martin P. Pos
Original Assignee
Nxp B.V.
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 Nxp B.V. filed Critical Nxp B.V.
Publication of WO2008020386A1 publication Critical patent/WO2008020386A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2171—Class D power amplifiers; Switching amplifiers with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/523—Circuit arrangements for protecting such amplifiers for amplifiers using field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/471—Indexing scheme relating to amplifiers the voltage being sensed
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/78—A comparator being used in a controlling circuit of an amplifier

Definitions

  • Fig. 1 depicts a typical audio class D amplifier.
  • Class-D audio amplifiers are becoming popular in multi-channel DVD receiver systems and in TV applications. The most important feature is high efficiency. Typical efficiency is well above 90% and may be achieved at full power. As a result a smaller heat sink or higher output power, with the same heat sink, is obtainable.
  • the power amplifier further comprises a comparator for receiving the first current and the second current and for generating a voltage for controlling a pre-diver circuit, the pre-driver circuit controlling the first driver and the second driver.
  • the two output currents, of the V/I converters are compared to each other.
  • the comparator includes a hysteresis function, trigger and release reference, in this embodiment determined by a change of a conversion factor of the second voltage to current converter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

L'invention se rapporte à un amplificateur de puissance comprenant un premier transistor (M1) comportant un premier canal conducteur, et un second transistor (M2) comportant un second canal conducteur, le premier canal conducteur étant relié en série avec le second canal conducteur et étant, en outre, relié à un nœud de sortie (2). L'amplificateur de puissance comprend en outre un premier circuit d'attaque (10) relié à une première électrode de commande du premier transistor (M1), un second circuit d'attaque (20) relié à une seconde électrode de commande du second transistor (M2), et un condensateur autoélévateur (Cboot) relié entre le nœud de sortie (2) et un nœud (1) du premier circuit d'attaque (10), ainsi qu'un premier circuit détecteur (40) relié en parallèle au condensateur autoélévateur (Cboot).
PCT/IB2007/053193 2006-08-16 2007-08-10 Amplificateur de puissance WO2008020386A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06118977 2006-08-16
EP06118977.5 2006-08-16

Publications (1)

Publication Number Publication Date
WO2008020386A1 true WO2008020386A1 (fr) 2008-02-21

Family

ID=38776208

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/053193 WO2008020386A1 (fr) 2006-08-16 2007-08-10 Amplificateur de puissance

Country Status (1)

Country Link
WO (1) WO2008020386A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106549576A (zh) * 2017-01-12 2017-03-29 威海新北洋正棋机器人股份有限公司 一种电源电路及控制系统
CN108880203A (zh) * 2018-07-31 2018-11-23 杭州国彪超声设备有限公司 一种超声电源驱动电路
GB2593279A (en) * 2020-02-07 2021-09-22 Cirrus Logic Int Semiconductor Ltd Dual bootstrapping for an open-loop pulse width modulation driver
US11190168B2 (en) 2018-02-19 2021-11-30 Cirrus Logic, Inc. Dual bootstrapping for an open-loop pulse width modulation driver
GB2585794B (en) * 2018-02-19 2022-04-20 Cirrus Logic Int Semiconductor Ltd Dual bootstrapping for an open-loop pulse width modulation driver

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365118A (en) * 1992-06-04 1994-11-15 Linear Technology Corp. Circuit for driving two power mosfets in a half-bridge configuration
EP0753934A1 (fr) * 1995-07-13 1997-01-15 STMicroelectronics S.r.l. Amplificeteur de classe D à sortie unique et deux tensions d'alimentation
US5627460A (en) * 1994-12-28 1997-05-06 Unitrode Corporation DC/DC converter having a bootstrapped high side driver
EP0945972A1 (fr) * 1996-08-08 1999-09-29 Kabushiki Kaisha Yaskawa Denki Procede de commande pour onduleur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365118A (en) * 1992-06-04 1994-11-15 Linear Technology Corp. Circuit for driving two power mosfets in a half-bridge configuration
US5627460A (en) * 1994-12-28 1997-05-06 Unitrode Corporation DC/DC converter having a bootstrapped high side driver
EP0753934A1 (fr) * 1995-07-13 1997-01-15 STMicroelectronics S.r.l. Amplificeteur de classe D à sortie unique et deux tensions d'alimentation
EP0945972A1 (fr) * 1996-08-08 1999-09-29 Kabushiki Kaisha Yaskawa Denki Procede de commande pour onduleur

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106549576A (zh) * 2017-01-12 2017-03-29 威海新北洋正棋机器人股份有限公司 一种电源电路及控制系统
CN106549576B (zh) * 2017-01-12 2019-02-15 威海新北洋正棋机器人股份有限公司 一种电源电路及控制系统
US11190168B2 (en) 2018-02-19 2021-11-30 Cirrus Logic, Inc. Dual bootstrapping for an open-loop pulse width modulation driver
GB2585794B (en) * 2018-02-19 2022-04-20 Cirrus Logic Int Semiconductor Ltd Dual bootstrapping for an open-loop pulse width modulation driver
CN108880203A (zh) * 2018-07-31 2018-11-23 杭州国彪超声设备有限公司 一种超声电源驱动电路
GB2593279A (en) * 2020-02-07 2021-09-22 Cirrus Logic Int Semiconductor Ltd Dual bootstrapping for an open-loop pulse width modulation driver

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