公开(公告)号：US09209703B2

公开(公告)日：2015-12-08

申请号：US14459164

申请日：2014-08-13

Applicant: DORA S.p.A.

Inventor： Alberto Iorio ,  Maurizio Foresta

IPC: H02M3/335 ,  H02M3/158

CPC classification number: H02M3/33592 ,  H02M3/1588 ,  Y02B70/1466 ,  Y02B70/1475

Abstract: A control device for a rectifier of a switching converter that includes a rectifier with at least one MOS transistor and a control device that is configured to generate a turn on and off signal for the at least one transistor. The control device also includes a measuring circuit to measure the conduction time of the body diode of the at least one transistor during each converter switching half-cycle. The control device is configured to, cycle by cycle: verify if the drain-source voltage of the at least one transistor is greater or less than a voltage threshold, and if the drain-source voltage is greater than the voltage threshold to turn off the at least one transistor, measure the conduction time of the body diode and increase the voltage threshold by a quantity in the next switching cycle.

Abstract translation: 一种用于开关转换器的整流器的控制装置，其包括具有至少一个MOS晶体管的整流器和被配置为产生所述至少一个晶体管的导通和截止信号的控制装置。 控制装置还包括测量电路，用于在每个转换器切换半周期期间测量至少一个晶体管的体二极管的导通时间。 控制装置被配置成逐周期：验证至少一个晶体管的漏 - 源电压是否大于或小于电压阈值，并且如果漏 - 源电压大于电压阈值以关闭 至少一个晶体管测量体二极管的导通时间，并在下一个开关周期内将电压阈值增加一个量。

公开(公告)号：US20150049522A1

公开(公告)日：2015-02-19

申请号：US14459159

申请日：2014-08-13

Applicant: DORA S.p.A.

Inventor： Alberto Iorio ,  Maurizio Foresta ,  Alberto Bianco

IPC: H02M3/335

CPC classification number: H02M3/33576 ,  H02M3/1588 ,  H02M3/33592 ,  H02M2001/0058 ,  Y02B70/1425 ,  Y02B70/1433 ,  Y02B70/1466 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: A control device detects zero crossings of a current through a rectifier transistor during plural cycles; generates a turn-on signal of the transistor and inserts a turn-on delay equal to a fixed first quantity from the start time of for each cycle. The control device starts counting consecutive cycles after inserting the turn-on delay; detects whether a zero crossing of the current through the transistor after turning on said transistor has occurred; if no zero crossing is detected before counting a number N of consecutive cycles, decreases the turn-on delay by a fixed second quantity for the next cycle; if a zero crossing is detected, maintains turned on the transistor; if the turn-on delay is smaller than first quantity, increases the turn-on delay o for the next switching cycle; and if the turn-on delay is equal to the first quantity, maintains the turn-on delay for the next switching cycle.

Abstract translation: 控制装置在多个周期期间检测通过整流器晶体管的电流的零交叉; 产生晶体管的导通信号，并从每个周期的开始时间插入等于固定的第一量的导通延迟。 控制装置在插入接通延迟后开始连续循环计数; 检测在导通所述晶体管之后是否发生通过所述晶体管的电流的过零点; 如果在对连续循环数N进行计数之前没有检测到零交叉，则在下一个周期将导通延迟减少固定的第二数量; 如果检测到零交叉，维持导通晶体管; 如果导通延迟小于第一量，则增加下一个开关周期的导通延迟o; 并且如果导通延迟等于第一数量，则维持下一个开关周期的导通延迟。

公开(公告)号：US20130271098A1

公开(公告)日：2013-10-17

申请号：US13800511

申请日：2013-03-13

Applicant: DORA S.P.A.

Inventor： Domenico Attianese ,  Giorgio Oddone

IPC: G05F1/46

CPC classification number: G05F1/46 ,  H02M3/158 ,  H02M2001/0006 ,  H02M2001/0032 ,  Y02B70/16

Abstract: Powering the internal circuitry, that is the controller of the power switch of a step-down DC-DC converter for a broad range of values of output voltage and achieving an enhanced energy saving in a low load conditions of operation is made possible by a method and implementing circuit based on defining two distinct thresholds of discrimination of the output voltage, both tied to a reference voltage, for generating two respective control signals and defining, from logical combinations of said two control signals, three distinct regions of operation of the converter upon the varying of electrical parameters, respectively identified by logical combinations of a pair of enabling signals.

Abstract translation: 为内部电路供电，即降压式DC-DC转换器的电源开关的控制器可以实现宽范围的输出电压值，并通过一种方法在低负载条件下实现增强的节能。 以及实现电路，其基于定义两个不同的输出电压鉴别阈值，两者都与参考电压相关，用于产生两个相应的控制信号，并且从所述两个控制信号的逻辑组合定义转换器的三个不同的操作区域 分别由一对使能信号的逻辑组合识别的电参数的变化。

公开(公告)号：US09461558B2

公开(公告)日：2016-10-04

申请号：US13749533

申请日：2013-01-24

Applicant: DORA S.p.A. ,  STMicroelectronics S.r.l.

Inventor： Alberto Bianco ,  Claudio Adragna

IPC: H02M5/42 ,  H02M7/04 ,  H02M7/68 ,  G05F1/00 ,  H02M7/217 ,  H02M1/42

CPC classification number: H02M7/217 ,  H02M1/4225 ,  Y02B70/126

Abstract: A control device of a switching converter controls the closing and opening of a switch of the converter that regulates the operation of an inductor. The control device includes a ramp voltage generator, a switch control circuit configured to close the switch based on a comparison of the ramp voltage with a first signal and a generator control circuit configured to control the ramp voltage generator based on a value of a second signal representative of a current flowing through the inductor of the converter, in comparison with the value of a third signal.

Abstract translation: 开关转换器的控制装置控制调节电感器操作的转换器的开关的闭合和断开。 控制装置包括斜坡电压发生器，开关控制电路，其被配置为基于斜坡电压与第一信号的比较来闭合开关，以及发电机控制电路，其被配置为基于第二信号的值来控制斜坡电压发生器 代表流过转换器的电感器的电流，与第三信号的值相比较。

公开(公告)号：US20150043249A1

公开(公告)日：2015-02-12

申请号：US14456908

申请日：2014-08-11

Applicant: DORA S.p.A.

Inventor： Alberto Iorio ,  Jeanpierre Vicquery

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H03K17/04123 ,  H03K17/133 ,  H03K17/162 ,  H03K17/302 ,  H03K2017/307

Abstract: A control device controls a rectifier of a switching converter that is supplied with an input voltage and provides an output current. The rectifier is configured to rectify the output current of the converter and has at least one transistor. The control device, when the at least one transistor is turned off, provides a slow discharge path to ground in a normal operation condition and provides a fast discharge path to ground for discharging the control terminal of the at least one transistor in response to detecting a zero cross event of the current flowing through said at least one transistor.

Abstract translation: 控制装置控制被提供有输入电压并提供输出电流的开关转换器的整流器。 整流器被配置为整流转换器的输出电流并具有至少一个晶体管。 当所述至少一个晶体管截止时，所述控制装置在正常操作状态下提供到地的缓慢放电路径，并且响应于检测到所述至少一个晶体管的控制端而向所述至少一个晶体管提供快速放电路径 流过所述至少一个晶体管的电流的零交叉事件。

公开(公告)号：US20040032403A1

公开(公告)日：2004-02-19

申请号：US10445137

申请日：2003-05-23

Applicant: STMicroelectronics S.r.I. and DORA S.p.A.

Inventor： Leonardo Sala ,  Daniele Domanin ,  Roberto Gariboldi

IPC: G09G005/00

CPC classification number: G09G3/3625 ,  G09G3/2018 ,  G09G3/2022 ,  G09G2320/0247 ,  G09G2320/0266

Abstract: The present invention relates to a driving method for flat panel display devices, particularly a driving method combining a Multi Line Addressing (MLA) technique and a Frame Rate Control (FRC) technique, for flat panel display devices such as Liquid Crystal Display (LCD). In an embodiment the method of driving an image display device comprises the following steps: dividing row electrodes of an image device, having a plurality of row electrodes and a plurality of column electrodes, into a plurality of subgroups; selecting one of the plurality of said subgroups having a prefixed number of electrodes; performing a gray scale display by a frame rate control (FRC) by using a prefixed number of frames and a prefixed number of bits representing the gray levels; decomposing one of said frame in a number of time instants proportional to said prefixed number of electrodes; putting the bits representing the gray levels equally distributed in said prefixed number of frames.

Abstract translation: 本发明涉及用于平板显示装置的驱动方法，特别是组合多线寻址（MLA）技术和帧速率控制（FRC）技术的驱动方法，用于诸如液晶显示器（LCD）的平板显示装置， 。 在一个实施例中，驱动图像显示装置的方法包括以下步骤：将具有多个行电极和多个列电极的图像装置的行电极分成多个子组; 选择所述多个所述子组中的一个具有预定数量的电极; 通过使用预定数量的帧和表示灰度级的前缀数目的比特来执行帧速率控制（FRC）的灰度级显示; 在与所述预定数量的电极成比例的多个时刻中分解所述帧中的一个; 将表示灰度级的位平均分配在所述前缀数目的帧中。

公开(公告)号：US09219408B2

公开(公告)日：2015-12-22

申请号：US14321600

申请日：2014-07-01

Applicant: DORA S.p.A.

Inventor： Alberto Bianco

IPC: H02M3/156 ,  H02M1/42

CPC classification number: H02M1/4225 ,  H02M1/4208 ,  Y02B70/126

Abstract: A transition mode power factor correction converter comprising a boost inductor, a switch, a diode, and output tank capacitor, has circuit means of limitation of the off-time interval of the switch to a fraction of the off-time interval, “complementary” to the on-time interval that is normally controlled for regulating the output voltage, during part of a cycle of a rectified sinusoidal voltage waveform input to the converter, when the current flowing in the inductor reaches a maximum threshold, causing the mode of operation of the device to switch from transition mode to continuous current mode for a middle phase angle region of a rectified sinusoidal input voltage waveform, under high load conditions, defined by said maximum current threshold. Current peaks amplitude and ripple are effectively reduced for same output power.

Abstract translation: 包括升压电感器，开关，二极管和输出电容器的过渡模式功率因数校正转换器具有将开关的截止时间间隔限制到关断时间间隔的一部分的电路装置，“互补” 在输入到转换器的整流正弦波电压波形的一部分周期期间，当电流中流过电感器的电流达到最大阈值时，通常被控制用于调节输出电压的导通时间间隔，导致操作模式 在由最大电流阈值定义的高负载条件下，整流正弦输入电压波形的中间相位角的转换模式切换到连续电流模式。 对于相同的输出功率，电流峰值幅度和纹波有效降低。

公开(公告)号：US09154030B2

公开(公告)日：2015-10-06

申请号：US13749539

申请日：2013-01-24

Applicant: DORA S.p.A. ,  STMicroelectronics S.r.l.

Inventor： Alberto Bianco ,  Claudio Adragna

IPC: H02M3/156 ,  H02M1/42 ,  H02M3/157

CPC classification number: H02M3/156 ,  H02M1/4225 ,  H02M3/157 ,  Y02B70/126

Abstract: A control device controls a switching converter. The converter has an input alternating supply voltage, a regulated direct voltage on the output terminal, and a switch connected to an inductor. The control device controls the closing and opening time period of said switch for each cycle and receives a first input signal representative of the current flowing through one element of the converter. The control device comprises a counter configured to count a time period, a comparator configured to compare said first input signal with a second signal, digital control block configured to control the closing and opening of said switch and to activate said counter to start the counting of said time period when the said first input signal crosses said second signal, with said switch being closed. The digital control block is configured to open the switch when the counter finishes the counting of said time period.

Abstract translation: 控制装置控制开关转换器。 转换器具有输入交流电源电压，输出端子上的稳压直流电压和连接到电感器的开关。 控制装置控制每个周期的所述开关的闭合和打开时间周期，并且接收表示流过转换器的一个元件的电流的第一输入信号。 控制装置包括配置成对时间段进行计数的计数器，被配置为将所述第一输入信号与第二信号进行比较的比较器，被配置为控制所述开关的关闭和打开的数字控制块，并激活所述计数器以开始计数 所述时间段，当所述第一输入信号与所述第二信号相交时，所述开关闭合。 数字控制块被配置为当计数器完成所述时间段的计数时打开开关。

公开(公告)号：US20150049529A1

公开(公告)日：2015-02-19

申请号：US14458078

申请日：2014-08-12

Applicant: DORA S.p.A. ,  STMicroelectronics S.r.l.

Inventor： Alberto Iorio ,  Giuseppe Scappatura ,  Alberto Bianco ,  Claudio Adragna ,  Silvio De Simone ,  Maurizio Foresta

IPC: H02M7/217 ,  H02M3/335

CPC classification number: H02M7/217 ,  H02M3/33507 ,  H02M3/33592 ,  H02M2001/0058 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: A control device for a transistor of a switching converter rectifier generates a control signal of the transistor and comprises a circuit to measure the conduction time of the body diode of the transistor cycle by cycle. When the conduction time is greater than a first threshold, the off time instant of the transistor is delayed by a first quantity in the next cycles, until the conduction time is less than the first threshold and greater than a second threshold. When the conduction time is between the first and second thresholds, the off time instant is delayed by a fixed second quantity in the next cycles until the conduction time is lower than the second threshold, with the second quantity less than the first quantity. When the conduction time is lower than the second threshold, the off time instant is advanced by the second quantity in the next cycle.

Abstract translation: 用于开关转换器整流器的晶体管的控制装置产生晶体管的控制信号，并且包括用于逐周期地测量晶体管体二极管的导通时间的电路。 当导通时间大于第一阈值时，晶体管的截止时间瞬间在下一个周期中延迟第一量，直到导通时间小于第一阈值并大于第二阈值。 当导通时间在第一阈值和第二阈值之间时，关闭时刻在下一个周期中延迟固定的第二数量，直到导通时间低于第二阈值，第二数量小于第一数量。 当导通时间低于第二阈值时，关闭时刻在下一个周期中提前第二个数量。

公开(公告)号：US20150049521A1

公开(公告)日：2015-02-19

申请号：US14459164

申请日：2014-08-13

Applicant: DORA S.p.A.

Inventor： Alberto Iorio ,  Maurizio Foresta

IPC: H02M3/335

CPC classification number: H02M3/33592 ,  H02M3/1588 ,  Y02B70/1466 ,  Y02B70/1475

Abstract: A control device for a rectifier of a switching converter that includes a rectifier with at least one MOS transistor and a control device that is configured to generate a turn on and off signal for the at least one transistor. The control device also includes a measuring circuit to measure the conduction time of the body diode of the at least one transistor during each converter switching half-cycle. The control device is configured to, cycle by cycle: verify if the drain-source voltage of the at least one transistor is greater or less than a voltage threshold, and if the drain-source voltage is greater than the voltage threshold to turn off the at least one transistor, measure the conduction time of the body diode and increase the voltage threshold by a quantity in the next switching cycle.

Abstract translation: 一种用于开关转换器的整流器的控制装置，其包括具有至少一个MOS晶体管的整流器和被配置为产生所述至少一个晶体管的导通和截止信号的控制装置。 控制装置还包括测量电路，用于在每个转换器切换半周期期间测量至少一个晶体管的体二极管的导通时间。 控制装置被配置成逐周期：验证至少一个晶体管的漏 - 源电压是否大于或小于电压阈值，并且如果漏 - 源电压大于电压阈值以关闭 至少一个晶体管测量体二极管的导通时间，并在下一个开关周期内将电压阈值增加一个量。