EP0421516A2 - Dispositif d'alimentation avec régulation de tension et limiteur de courant - Google Patents

Dispositif d'alimentation avec régulation de tension et limiteur de courant Download PDF

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Publication number
EP0421516A2
EP0421516A2 EP90202535A EP90202535A EP0421516A2 EP 0421516 A2 EP0421516 A2 EP 0421516A2 EP 90202535 A EP90202535 A EP 90202535A EP 90202535 A EP90202535 A EP 90202535A EP 0421516 A2 EP0421516 A2 EP 0421516A2
Authority
EP
European Patent Office
Prior art keywords
voltage
control
resistor
transistor
power supply
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.)
Granted
Application number
EP90202535A
Other languages
German (de)
English (en)
Other versions
EP0421516B1 (fr
EP0421516A3 (en
Inventor
Thomas Dipl.-Ing Riedger
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.)
Nokia of America Corp
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0421516A2 publication Critical patent/EP0421516A2/fr
Publication of EP0421516A3 publication Critical patent/EP0421516A3/de
Application granted granted Critical
Publication of EP0421516B1 publication Critical patent/EP0421516B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
    • G05F1/56—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G05F1/573—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S323/00—Electricity: power supply or regulation systems
    • Y10S323/908—Inrush current limiters

Definitions

  • the invention relates to a power supply device with a power transistor controlled by a control transistor, the switching path of which lies in each case between a pole of an unregulated DC input voltage and a regulated supply voltage, with a current measuring resistor, with a first control amplifier which drives the control transistor via a first electrode and which has a derivable from the supply voltage Comparing voltage with a first reference voltage, and with a second control amplifier, which compares a measuring voltage that can be tapped at the current measuring resistor with a second reference voltage.
  • DC voltages are required at which a desired voltage value is maintained within a certain tolerance range, even in the event of mains voltage fluctuations, load current fluctuations and temperature fluctuations.
  • a DC voltage obtained, for example, from the mains voltage by rectification is not directly suitable as an operating voltage for electronic circuits, but must be stabilized and smoothed by a downstream voltage regulation and current limitation.
  • a power supply device of the type mentioned is known from US-PS 4,346,342.
  • the voltage control is formed from a first control amplifier, which has a voltage at the inverting input, obtained at the tap of an output-side voltage divider, with a voltage at the non-inverting input compares the reference voltage.
  • the output of the first control amplifier is connected to the base of the control transistor.
  • the current limitation is formed by a second control amplifier, which compares a measuring voltage that can be tapped at the current measuring resistor with a second reference voltage.
  • the output of the second control amplifier is also connected to the base of the control transistor via a diode, while the emitter of the control transistor is connected to a reference potential via a resistor.
  • the base of the control transistor is thus driven both by the first control amplifier for voltage regulation and by the second control amplifier for current limitation.
  • the reference voltages of the two control amplifiers are generated from two separate reference voltages.
  • the invention is based on the object of specifying a power supply device of the type mentioned at the outset which has a low outlay on components and an adequate dynamic control behavior.
  • the first electrode is in particular the base and the second electrode is the emitter of the control transistor and the control transistor operates in the emitter circuit with active voltage regulation and in the base circuit with active current limitation.
  • the first control amplifier for voltage regulation is then active in normal operation. over If the measuring voltage across the current measuring resistor rises to the limit value specified by the second reference voltage and its output voltage rises, the control transistor is operated in the basic circuit and the load current of the control transistor drops to the extent that the measuring voltage rises.
  • a resistor between the output of the second control amplifier and the emitter of the control transistor.
  • a current negative feedback is achieved with the help of the resistor, so that in particular the temperature and current dependency of the gain of the control transistor and the dependency due to sample scatter is reduced.
  • the inverting input of the second control amplifier is connected to the pole of the regulated supply voltage via a resistor. This results in a declining characteristic of the regulated supply voltage as a function of the output current.
  • the first and the second reference voltage are obtained from a single reference voltage source.
  • This is designed, for example, as a zener diode or as a bandgap reference element.
  • the first reference voltage is obtained directly from the reference voltage source, while the second reference voltage is obtained from the reference voltage source, for example with the aid of a voltage divider can be won. Obtaining the two reference voltages from a single reference voltage source leads to further component savings.
  • a rectifier diode is located antiparallel to the base-emitter path of the control transistor. This limits the voltage on the base-emitter path and thus prevents a possible breakdown that occurs when switching from voltage control to current limitation, i.e. can occur during the transition of the operating state of the control transistor from the emitter circuit to the base circuit.
  • the first control amplifier is fed back through the series connection of a resistor and a capacitor. This enables a frequency response correction of the first control amplifier.
  • the second control amplifier is fed back through the series connection of a resistor and a capacitor. This makes it possible to correct the frequency response of the second control amplifier independently of that of the first control amplifier.
  • the figure shows a power supply device with voltage regulation and current limitation.
  • the voltage regulation and current limitation lie between a power supply device 1, which supplies an unregulated direct voltage UE (input voltage) and one Load resistor RL through which an output current I flows and to which a regulated supply voltage UA (output voltage) is present.
  • a first series branch ZW1 there is a PNP power transistor T1, the base-emitter path of which is connected via a resistor R4.
  • the power transistor T1 is driven by a control transistor T2.
  • the collector of the control transistor T2 is connected to the base of the power transistor T1.
  • a capacitor C3 and the series connection of a first resistor R1 and a second resistor R2 are connected in parallel with the load resistor RL.
  • the center tap of the resistors R1, R2 is connected to the inverting input of a first control amplifier OP1.
  • a reference voltage source Uref is located between the non-inverting input of the first control amplifier OP1 and the negative reference potential UA- of the output voltage UA.
  • the pole of the reference voltage source Uref connected to the non-inverting input of the first control amplifier OP1 is connected via a resistor R6 to the inverting input of a second control amplifier OP2.
  • the inverting input of the second control amplifier OP2 is also connected via a resistor R7 to the positive pole UA + of the output voltage UA.
  • a current measuring resistor R10 In a second series branch ZW2, between the negative pole UE- of the unregulated input voltage UE and the negative pole UA- of the regulated output voltage UA, there is a current measuring resistor R10, to which a measuring voltage UM is applied.
  • the connection of the current measuring resistor R10 connected to the negative pole UA- of the output voltage UA is connected to the non-inverting input of the second control amplifier OP2 and the connection connected to the negative pole UE- of the unregulated direct voltage UE is connected via a resistor R8 to the inverting input of the second control amplifier OP2 connected.
  • the control amplifier OP1 and the output of the first control amplifier OP1 connected to the base of the control transistor T2 are connected in series with a resistor R3 and a capacitor C1.
  • the series connection of a resistor R9 and a capacitor C2 lies between the inverting input of the second control amplifier OP2 and the output of the second control amplifier OP2.
  • the output of the second control amplifier OP2 is connected via a resistor R5 to the emitter of the control transistor T2.
  • a rectifier diode D1 is arranged antiparallel to the base-emitter path of the control transistor T2.
  • the two control amplifiers OP1, OP2 have a common voltage supply with a positive connection VCC and a negative connection VEE.
  • the voltage required for this is tapped directly from the direct voltage UE.
  • the positive connection VCC is connected to the positive pole UE + and the negative connection VEE is connected to the negative pole UE- of the unregulated direct voltage UE.
  • their supply voltage can also be obtained via a simple stabilization circuit.
  • the first control amplifier OP1 In normal operation, the first control amplifier OP1 is active for voltage regulation. In this operating state, the output current I is not limited by the second control amplifier OP2. The output of the second control amplifier OP2 is at the potential VEE. Thus, the connection of the resistor R5 connected to the emitter of the control transistor T2 is at the potential VEE and the control transistor T2 operates in an emitter circuit with current feedback.
  • the collector current of the control transistor T2 and thus also the base current of the power transistor T1 is proportional to the base voltage of the control transistor T2 as a result of the negative current feedback of the control transistor T2 through the resistor R5.
  • the output current I and thus also the collector current of the power transistor T1 is in turn proportional to the base current of the power transistor T1.
  • the output current I is regulated as a function of the instantaneous value of the load resistor RL so that the supply voltage UA at the load resistor RL remains constant.
  • the output voltage of the first control amplifier OP1 and thus the voltage at the base of the control transistor T2 are such that the voltage present at the inverting input of the first control amplifier OP1, which is formed by division via the voltage divider R1, R2, is equal to that at the non-inverting one Input reference voltage Uref.
  • the current feedback of the control transistor T2 through the emitter resistor R5 has the advantage that the gain of the control transistor T2 remains largely stable and is essentially determined by the resistance value of the emitter resistor R5 and is less dependent on the non-linear transmission characteristic of the control transistor T2. This also reduces the temperature and current dependency of the gain of the control transistor T2 and the dependency due to sample scatter.
  • the first regulating amplifier OP1 operating as a voltage regulator now tries to maintain the base current of the power transistor T1 by further increasing its output voltage until it finally reaches the positive modulation limit VCC.
  • the base of the control transistor T2 is now at a fixed potential VCC and the control transistor T2 thus operates in the basic circuit.
  • the collector current of the control transistor T2 and thus the output current I decrease to the extent that the output voltage of the second control amplifier OP2 increases.
  • the resistor R7 connected between the positive pole UA + of the output voltage UA and the inverting input of the second control amplifier OP2 achieves a declining characteristic of the supply voltage UA as a function of the output current I.
  • the combination of the two output signals of the first control amplifier OP1, which operates as a voltage regulator, and of the second control amplifier OP2, which operates as a current limiter, takes place only by one component, that is to say by the control transistor T2, which, depending on whether the voltage regulation or the current limitation is active, either in the emitter circuit or in Basic circuit works.
  • a double operation amplifier integrated in one component is used for the first and second control amplifiers OP1, OP2, the common-mode input voltage range of which includes the value of the potential VEE.
  • the use of a double operation amplifier leads not only to component reduction, but also to space and cost savings.
  • the polarity of the voltage of the base-emitter path of the control transistor T2 can be reversed.
  • the diode D1 antiparallel to the base-emitter path limits the voltage and thus prevents a breakdown of the base-emitter path.
  • the series connections of the capacitor C1 and the resistor R3 or of the capacitor C2 and the resistor R9 form negative feedback networks of the control amplifiers OP1, OP2, which are used for frequency response correction. They can be dimensioned independently for the respective control amplifier OP1, OP2.
  • the reference voltage Uref is generated, for example, using a zener diode or a bandgap reference element. Both the setpoints of the first and the second control amplifier are obtained from the one reference voltage Uref.
  • the power supply device with voltage control and current limitation also works reliably with very small differences between the input voltage UE and the supply voltage UA (low drop-out voltage). This results in higher efficiency and a higher supply voltage for the smallest input voltage.
  • a power supply device can be implemented in which all voltages and currents have the opposite polarity compared to the embodiment shown in the figure.
  • all transistors are replaced by their complementary types and the anode and cathode are interchanged for the diode D1.
  • a type is used whose common mode input voltage range includes the value of the potential VCC.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP90202535A 1989-09-30 1990-09-25 Dispositif d'alimentation avec régulation de tension et limiteur de courant Expired - Lifetime EP0421516B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3932776A DE3932776A1 (de) 1989-09-30 1989-09-30 Stromversorgungseinrichtung mit spannungsregelung und strombegrenzung
DE3932776 1989-09-30

Publications (3)

Publication Number Publication Date
EP0421516A2 true EP0421516A2 (fr) 1991-04-10
EP0421516A3 EP0421516A3 (en) 1991-08-21
EP0421516B1 EP0421516B1 (fr) 1995-12-20

Family

ID=6390620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90202535A Expired - Lifetime EP0421516B1 (fr) 1989-09-30 1990-09-25 Dispositif d'alimentation avec régulation de tension et limiteur de courant

Country Status (4)

Country Link
US (1) US5041777A (fr)
EP (1) EP0421516B1 (fr)
JP (1) JPH03123916A (fr)
DE (2) DE3932776A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0497106A3 (en) * 1991-01-26 1993-03-31 Bosch Telecom Oeffentliche Vermittlungstechnik Gmbh Circuit arrangement for voltage and current regulation
EP0576772A1 (fr) * 1992-06-25 1994-01-05 STMicroelectronics S.r.l. Régulateur de tension à sortie programmable
WO1995012916A1 (fr) * 1993-10-30 1995-05-11 Robert Bosch Gmbh Installation d'alimentation a distance
WO1995031762A1 (fr) * 1994-05-16 1995-11-23 Thomson Consumer Electronics, Inc. Regulateur de tension
WO1995031761A1 (fr) * 1994-05-16 1995-11-23 Thomson Consumer Electronics, Inc. Regulateur de tension a double tension avec limitation de courant de type 'foldback'
CN102625512A (zh) * 2011-01-27 2012-08-01 英飞特电子（杭州）有限公司 一种均流电路
EP2637160A1 (fr) * 2012-03-07 2013-09-11 Samsung Display Co., Ltd. Unité d'alimentation et affichage électroluminescent organique la comprenant

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
US5274323A (en) * 1991-10-31 1993-12-28 Linear Technology Corporation Control circuit for low dropout regulator
DE4231037C2 (de) * 1992-09-17 1995-04-13 Telefunken Microelectron Strombegrenzungsschaltung mit umschaltbarem maximalem Stromwert für scheinwiderstandsbehaftete Verbraucher
US5726875A (en) * 1993-09-27 1998-03-10 Mitsumi Electric Co. Ltd. AC-DC adapter
JP2643813B2 (ja) * 1993-12-24 1997-08-20 日本電気株式会社 安定化電源回路
US5545970A (en) * 1994-08-01 1996-08-13 Motorola, Inc. Voltage regulator circuit having adaptive loop gain
GB9500661D0 (en) * 1995-01-13 1995-03-08 Autotronics Eng Int Ltd Electrical apparatus
US7269034B2 (en) 1997-01-24 2007-09-11 Synqor, Inc. High efficiency power converter
JP2002514378A (ja) 1997-01-24 2002-05-14 シンクォール・インコーポレーテッド 高効率電力変換装置
WO1999012240A1 (fr) 1997-09-02 1999-03-11 Siemens Aktiengesellschaft Circuit et procede de limitation du courant pour consommateur a courant alternatif
DE29909206U1 (de) 1999-05-28 2000-10-05 Ellenberger & Poensgen Schutzeinrichtung
US6894468B1 (en) * 1999-07-07 2005-05-17 Synqor, Inc. Control of DC/DC converters having synchronous rectifiers
US6291975B1 (en) * 2000-03-27 2001-09-18 Rockwell Collins Method and system for efficiently regulating power supply voltages with reduced propagation of power transients capable of communicating information
DE20010283U1 (de) * 2000-06-08 2001-07-19 Siemens AG, 80333 München Stromversorgung mit verlustarmer Einschaltstrombegrenzung
FR2819904B1 (fr) * 2001-01-19 2003-07-25 St Microelectronics Sa Regulateur de tension protege contre les courts-circuits
US6822426B1 (en) * 2003-06-06 2004-11-23 The Boeing Company Regulator with feedback voltage and current signal summing into controller
JP2007006670A (ja) * 2005-06-27 2007-01-11 Alps Electric Co Ltd 突入電流防止回路
JP5885683B2 (ja) * 2013-02-19 2016-03-15 株式会社東芝 降圧レギュレータ
JP6180815B2 (ja) * 2013-06-21 2017-08-16 エスアイアイ・セミコンダクタ株式会社 ボルテージレギュレータ
US10199950B1 (en) 2013-07-02 2019-02-05 Vlt, Inc. Power distribution architecture with series-connected bus converter

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US3327201A (en) * 1963-12-11 1967-06-20 Jr Lott W Brantley Series voltage regulator with protection circuit
US3679961A (en) * 1971-07-07 1972-07-25 Ramsey Controls Inc Buffer amplifier and voltage regulating circuit
US3723774A (en) * 1971-08-06 1973-03-27 Jerrold Electronics Corp Power supply with temperature compensated current foldback
US4019096A (en) * 1976-06-07 1977-04-19 Rockwell International Corporation Current limiting apparatus
DE2716500A1 (de) * 1977-04-14 1978-10-26 Bosch Gmbh Robert Spannungsregler fuer eine gleichspannung
US4254372A (en) * 1979-02-21 1981-03-03 General Motors Corporation Series pass voltage regulator with overcurrent protection
US4338646A (en) * 1981-04-27 1982-07-06 Motorola, Inc. Current limiting circuit
US4346342A (en) * 1981-06-09 1982-08-24 Rockwell International Corporation Current limiting voltage regulator
DE3341345C2 (de) * 1983-11-15 1987-01-02 SGS-ATES Deutschland Halbleiter-Bauelemente GmbH, 8018 Grafing Längsspannungsregler
US4535282A (en) * 1983-12-14 1985-08-13 Stromberg-Carlson Corp. Voltage regulation circuit
US4800331A (en) * 1987-02-12 1989-01-24 United Technologies Corporation Linear current limiter with temperature shutdown

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0497106A3 (en) * 1991-01-26 1993-03-31 Bosch Telecom Oeffentliche Vermittlungstechnik Gmbh Circuit arrangement for voltage and current regulation
EP0576772A1 (fr) * 1992-06-25 1994-01-05 STMicroelectronics S.r.l. Régulateur de tension à sortie programmable
US5453678A (en) * 1992-06-25 1995-09-26 Sgs-Thomson Microelectronics S.R.L. Programmable-output voltage regulator
WO1995012916A1 (fr) * 1993-10-30 1995-05-11 Robert Bosch Gmbh Installation d'alimentation a distance
US6172491B1 (en) 1993-10-30 2001-01-09 Robert Bosch Gmbh Remote feeding device
WO1995031762A1 (fr) * 1994-05-16 1995-11-23 Thomson Consumer Electronics, Inc. Regulateur de tension
WO1995031761A1 (fr) * 1994-05-16 1995-11-23 Thomson Consumer Electronics, Inc. Regulateur de tension a double tension avec limitation de courant de type 'foldback'
CN102625512A (zh) * 2011-01-27 2012-08-01 英飞特电子（杭州）有限公司 一种均流电路
EP2637160A1 (fr) * 2012-03-07 2013-09-11 Samsung Display Co., Ltd. Unité d'alimentation et affichage électroluminescent organique la comprenant
US9514671B2 (en) 2012-03-07 2016-12-06 Samsung Display Co., Ltd. Power supply unit and organic light emitting display including the same

Also Published As

Publication number Publication date
DE59009980D1 (de) 1996-02-01
EP0421516B1 (fr) 1995-12-20
EP0421516A3 (en) 1991-08-21
JPH03123916A (ja) 1991-05-27
US5041777A (en) 1991-08-20
DE3932776A1 (de) 1991-04-11

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