公开(公告)号：EP1540801A1

公开(公告)日：2005-06-15

申请号：EP02783520.6

申请日：2002-09-20

Applicant: STMicroelectronics S.r.l.

Inventor： PIDUTTI, Albino ,  ADRAGNA, Claudio ,  FAGNANI, Mauro

IPC: H02M1/00

CPC classification number: H02M1/4225 ,  Y02B70/126

Abstract: A power factor correction device for switching power supplies is described, which comprises a converter (20) and a control device (100;200;300) coupled with said converter (20) in such a way as to obtain from a input network alternated voltage (Vin) a direct regulated voltage (Vout) at the output terminal. The converter (20) comprises a power transistor (M) and the control device (100;200;300) comprises an error amplifier (3) having in input at the inverting terminal a first signal (Vr) proportional to said regulated voltage (Vout) at at the non-inverting terminal a voltage reference (Vref), at least one capacitor (C) having a first terminal and a second terminal which are coupled respectively with the inverting terminal and the output terminal (31) of the error amplifier (3) and a driving circuit (4-6) of said power transistor (M) which is coupled with the second terminal of said capacitor (C). The control device (100;200;300) comprises interruption means (SW)placed between the output terminal (31) of said error amplifier (3) and said driving circuit (4-6) for at least one time period (T) lower than the time period (Tciclo) in which said control device (100; 200; 300) is operative.

公开(公告)号：EP1735900A1

公开(公告)日：2006-12-27

申请号：EP05716853.6

申请日：2005-03-01

Applicant: STMicroelectronics S.r.l.

Inventor： ADRAGNA, Claudio

IPC: H02M1/00

CPC classification number: H02M1/32

Abstract: The present invention relates to switching. power supplies, and especially to a method and the related circuit for protection against malfunctioning of the feedback loop in switching power supplies. More particularly it relates to a circuit for the identification of a condition of excessively high voltage at the output. In one embodiment the circuit for the protection against malfunctioning of the feedback loop of a switching power supply comprises: means for generating (vaux R1, R2) a voltage proportional to the output voltage of said switching power supply; a comparator (15) for comparing said voltage proportional to the output voltage with a reference voltage (vth); a counter (17) coupled to said comparator capable of supplying an output signal when said voltage proportional to the output voltage exceeds said reference voltage a preset number of times; said output signal is indicative of a malfunctioning of the feedback loop.

公开(公告)号：EP1523802A1

公开(公告)日：2005-04-20

申请号：EP02760554.2

申请日：2002-07-19

Applicant: STMicroelectronics S.r.l.

Inventor： FAGNANI, Mauro ,  PIDUTTI, Albino ,  ADRAGNA, Claudio

IPC: H02M1/00 ,  H02M3/335

CPC classification number: H02M1/36 ,  H02M3/335 ,  H02M2001/0006

Abstract: The present invention refers to a starting circuit for switching power supplies (SMPS), to a switching power supply comprising a starting circuit )and an integrated circuit of a switching power supply. In an embodiment thereof the starting circuit (13) for switching power supplies having a first supply voltage (Vin) coming from a first terminal and a second supply voltage (Vcc) coming from a second terminal and a third tenninal (30); said starting circuit comprises: a first current path between said first terminal and said third terminal (30); a second current path between said first tenninal and said second terminal; a third current path between said second terminal and said third terminal (30); a two-way voltage regulator (M3, Dz2, R5, R6) placed along said second current path.

Abstract translation: 本发明涉及用于开关电源（SMPS）的启动电路，包括启动电路的开关电源）和开关电源的集成电路。 在其实施例中，用于开关电源的启动电路（13）具有来自第一端子的第一电源电压（Vin）和来自第二端子和第三端子（30）的第二电源电压（Vcc）; 所述启动电路包括：在所述第一端子和所述第三端子（30）之间的第一电流路径; 所述第一终端和所述第二终端之间的第二电流路径; 所述第二端子和所述第三端子（30）之间的第三电流路径; 沿着所述第二电流路径放置的双向电压调节器（M3，Dz2，R5，R6）。

公开(公告)号：EP3787172A1

公开(公告)日：2021-03-03

申请号：EP20193624.2

申请日：2020-08-31

Applicant: STMicroelectronics S.r.l.

Inventor： ADRAGNA, Claudio

IPC: H02M3/337 ,  H02M1/00

Abstract: A driver circuit (210a) for a resonant converter (20) is described. The resonant converter comprises at least one half-bridge and a resonant tank, rectifier and filter circuit connected between a switching node of the half-bridge and the output terminals of the resonant converter. The driver circuit (210a) comprises a first and a second terminal in order to drive the half-bridge via respective drive signals ( HSGD , LSGD ), a third terminal in order to receive a signal ( Vs ) proportional to the resonant current flowing to the resonant tank, rectifier and filter circuit, and a fourth terminal in order to receive a feedback signal (Ic) determined as a function of the output voltage or the output current of the resonant converter (20). An analog zero current comparator generates a first control signal indicating when the resonant current changes sign as a function of the signal ( Vs ) received at the third terminal, A first ramp generator circuit (2300) provides at output a first ramp signal (INT), and a comparison circuit (2106) determine whether the first ramp signal (INT) reaches at least one reference threshold. Specifically, the driver circuit (210a) drives half-bridge via the drive signals (HSGD, LSGD ) during a first ( TB ) and a second ( TA ) consecutive switching semi-period, wherein each of the first ( TB ) and the second ( TA ) switching semi-period ends when the comparison circuit (2110) indicates that the first ramp signal ( INT ) has reached a respective reference threshold.
More specifically, a control circuit (2106) generates in each of the first ( TB ) and the second ( TA ) switching semi-period one or more control signals ( CTRL1, CTRL2 ) indicating a first interval ( Tz ) staring at the instant when the respective semi-period ( TA, TB ) is started and ending at the instant when the first control signal indicates that the resonant current has changed sign, and a second interval starting at the instant when the first control signal indicates that the resonant current has changed sign and ending at the instant when the comparison circuit (2106) indicates that the first ramp signal ( INT ) has reached a respective reference threshold.
A correction circuit (2306) modifies the first ramp signal ( INT ) provided at input to the comparison circuit (2106), whereby the first ramp signal ( INT ) has a first gradient value ( Io ; kIc ) during the first interval ( Tz ) and a second gradient value ( kIc + Io; Io + kIref ) during the second interval, the first gradient value ( Io ; kIc ) being a non-zero value and the absolute value of the second gradient value ( kIc + Io ; Io + kIref ) being greater than the absolute value of the first gradient value.
Alternatively, the correction circuit modifies one or more of the reference thresholds ( Vp / Vv ) of the comparison circuit (2106) by adding a second ramp signal ( Vx ) to a respective initial threshold value.

公开(公告)号：EP2054787B1

公开(公告)日：2009-12-23

申请号：EP06796258.9

申请日：2006-08-07

Applicant: STMicroelectronics S.r.l.

Inventor： FAGNANI, Mauro ,  BARTOLO, Vincenzo ,  ADRAGNA, Claudio

IPC: H02M1/42 ,  G05F1/70

CPC classification number: G05F1/70

公开(公告)号：EP2054787A1

公开(公告)日：2009-05-06

申请号：EP06796258.9

申请日：2006-08-07

Applicant: STMicroelectronics S.r.l.

Inventor： FAGNANI, Mauro ,  BARTOLO, Vincenzo ,  ADRAGNA, Claudio

IPC: G05F1/70 ,  H02M1/00

CPC classification number: G05F1/70

Abstract: Herein described is a control device of a device for the correction of the power factor in forced switching power supplies; said device for the correction of the power factor comprises a converter (20) and said control device (1) is coupled to the converter to obtain from an alternating input line voltage (Vin) a regulated output voltage (Vout) . The control device (1) comprises generating means (421-423) associated to a capacitor (Cf f) for generating a signal (Vff) representative of the root-mean- square value of the alternating line voltage; the generating means (421-424) are associated to means for discharging (Rf f) said capacitor. The control device comprises further means for discharging (Ml, COMPl, Cl; Ml 6, COMPI 1, CI 1; M50, COMP22, C0MP33, Cint) the capacitor (Cf f) suitable for discharging said capacitor when the signal (Vff) representative of the root-mean- square value of the alternating line voltage goes below a given value (VCl, VCI 1, Vint) .

Abstract translation: 这里描述的是用于强制开关电源中的功率因数校正的装置的控制装置; 所述用于校正功率因数的装置包括转换器（20），并且所述控制装置（1）耦合到转换器以从交流输入线电压（Vin）获得经调节的输出电压（Vout）。 控制装置（1）包括与电容器（Cff）相关联的产生装置（421-423），用于产生表示交流线电压的均方根值的信号（Vff） 生成装置（421-424）与用于放电（Rff）所述电容器的装置相关联。 所述控制装置包括用于当所述信号（Vff）代表性的信号（Vff）代表当所述信号（Vff）代表所述电容器（Cff）时适合于使所述电容器放电的另一装置（M1，COMP1，C1; M16，COMP1，CI1; M50，COMP22，C0MP33， 的交流线电压的均方根值低于给定值（VCl，VCI 1，Vint）。

公开(公告)号：EP2417697A1

公开(公告)日：2012-02-15

申请号：EP10715196.1

申请日：2010-04-09

Applicant: STMicroelectronics S.r.l.

Inventor： ADRAGNA, Claudio ,  SANTORO, Christian Leone ,  NOVELLI, Aldo Vittorio

IPC: H02M3/337

CPC classification number: H02M3/337 ,  Y02B70/1433

Abstract: A resonant dc-dc converter for converting an input dc voltage to an output dc voltage is provided. The converter includes a switching circuit for receiving the input dc voltage and generating a periodic square wave voltage oscillating between a high value corresponding to the input dc voltage and a low value corresponding to a fixed voltage. The square wave voltage oscillates at a main frequency with a main duty cycle. The converter further includes a switching driving circuit for driving the switching circuit. The switching driving circuit includes a timing circuit for setting the main frequency and the main duty cycle of the square wave voltage. The timing circuit is configured to set the value of the main duty cycle to about 50% when the converter operates in steady state. The converter includes a conversion circuit based on a resonant circuit for generating the output dc voltage from the square wave voltage based on the main frequency and on the main duty cycle. The converter further includes a disabling circuit for temporarily halting the timing circuit after a power on of the converter in such a way to temporarily vary the main duty cycle of the square wave voltage during at least one period of the square wave voltage.

公开(公告)号：EP2033289A1

公开(公告)日：2009-03-11

申请号：EP06780573.9

申请日：2006-06-21

Applicant: STMicroelectronics S.r.l.

Inventor： ADRAGNA, Claudio ,  GATTAVARI, Giuseppe

IPC: H02J1/10 ,  H02M3/158

CPC classification number: H02M3/1584 ,  H02J1/102 ,  H02M2001/0048 ,  Y02B70/1491 ,  Y10T307/406 ,  Y10T307/555 ,  Y10T307/707

Abstract: A control device of a plurality of switching converters (Convl.ConvN) is disclosed; each converter comprises at least one power switch and is associated with a control circuit (Mod1 ...ModN) of the at least one power switch. The control device comprises means (100) suitable for comparing a signal (CTRL) representative of the load of the plurality of converters (ConvL.ConvN) with a plurality of reference signals (Vref1 ...Vref(N-l)) and suitable for enabling or disabling at least one of said plurality of control circuits (Mod1...ModN) in response to said comparison.

公开(公告)号：EP1523802B1

公开(公告)日：2008-03-12

申请号：EP02760554.2

申请日：2002-07-19

Applicant: STMicroelectronics S.r.l.

Inventor： FAGNANI, Mauro ,  PIDUTTI, Albino ,  ADRAGNA, Claudio

IPC: H02M1/00 ,  H02M3/335

CPC classification number: H02M1/36 ,  H02M3/335 ,  H02M2001/0006

Abstract: The present invention refers to a starting circuit for switching power supplies (SMPS), to a switching power supply comprising a starting circuit )and an integrated circuit of a switching power supply. In an embodiment thereof the starting circuit (13) for switching power supplies having a first supply voltage (Vin) coming from a first terminal and a second supply voltage (Vcc) coming from a second terminal and a third tenninal (30); said starting circuit comprises: a first current path between said first terminal and said third terminal (30); a second current path between said first tenninal and said second terminal; a third current path between said second terminal and said third terminal (30); a two-way voltage regulator (M3, Dz2, R5, R6) placed along said second current path.