-
公开(公告)号：US10205377B1
公开(公告)日：2019-02-12
申请号：US15948183
申请日：2018-04-09
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alberto Bianco , Claudio Adragna
Abstract: A method and controller for controlling a converter are provided. The converter is operated in a first phase in which controller logic asserts a first gate drive signal to cause a first transistor of the converter to be conductive and deasserts a second gate drive signal to cause a second transistor of the converter to be non-conductive. In a first deadtime phase and a second phase, the controller logic deasserts both the first and second gate drive signals to cause leakage energy from a leakage inductance of a primary winding of the converter to be transferred to a clamp capacitance of the converter. After the leakage energy is transferred, the converter is operated in a third phase in which the logic asserts the second gate drive signal and deasserts the first gate drive signal.
-
22.发明授权公开(公告)号：US10186965B2
公开(公告)日：2019-01-22
申请号：US15159642
申请日：2016-05-19
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alberto Bianco
Abstract: A control circuit for a switching voltage regulator is configured to receive an error signal representative of a regulator output voltage in relation to a nominal output voltage, and includes a set/reset flip-flop, a hysteresis comparator and a logic circuit. The flip-flop is configured to produce a switching control signal according to logic values at its set and reset terminals. The comparator is configured to produce a set signal at the set terminal when an error signal drops below a first value, and a reset signal when the error signal rises above a second value. The logic circuit is configured to prevent transmission of the reset signal to the reset terminal during a selected minimum time period and to thereafter enable transmission of the reset signal, and further, to produce an alternate reset signal at the reset terminal at the end of the selected maximum time period.
-
23.发明申请公开(公告)号：US20160233760A1
公开(公告)日：2016-08-11
申请号：US14868104
申请日：2015-09-28
Applicant: STMICROELECTRONICS S.r.l.
Inventor： Alberto Bianco , Giuseppe Scappatura
IPC: H02M1/42
CPC classification number: H02M1/42 , H02J7/0052 , H02J2007/0059 , H02M1/083 , H02M1/36 , H02M1/4208 , H02M1/4225 , H02M1/44 , H02M3/04 , H02M7/04 , H02M2001/0009 , H02M2001/0058 , H05B33/0809 , H05B33/0815 , Y02B70/126 , Y02B70/1491
Abstract: A control device for a converter of the switched-mode type provided with an inductor element and a switch element generates a driving signal for controlling switching of the switch element and determining alternately a phase of storage of energy in the inductor element as a function of an input quantity and a phase of transfer of the energy stored in the inductor element to an output element on which an output quantity is present; the control device generates the driving signal by means of a control based on the value of the output quantity in order to regulate the same output quantity. In particular, an estimation block determines an estimated value of the output quantity, and a driving block generates the driving signal as a function of said estimated value.
Abstract translation: 用于具有电感器元件和开关元件的开关型转换器的控制装置产生用于控制开关元件的开关的驱动信号，并且交替地确定电感器元件中的能量的存储相位作为 输入量和存储在电感器元件中的能量传递到其上存在输出量的输出元件的相位; 控制装置通过基于输出量的值的控制来产生驱动信号，以便调节相同的输出量。 具体地，估计块确定输出量的估计值，并且驱动块根据所述估计值产生驱动信号。
-
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
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
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。
-
Patent Agency Ranking
公开(公告)号：US20130194845A1
公开(公告)日：2013-08-01
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: H02M7/217
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：US11588408B2
公开(公告)日：2023-02-21
申请号：US17240037
申请日：2021-04-26
Applicant: STMicroelectronics S.r.l.
Inventor： Alberto Bianco , Francesco Ciappa , Giuseppe Scappatura
Abstract: An embodiment provides a circuit including a transformer having a primary winding coupled to an input port configured to receive an input voltage and a secondary winding configured to provide an output voltage at an output port, controller circuitry configured to switch on and off a current through the primary winding so that energy is transferred to the secondary winding while switching and supply circuitry connected to the controller circuitry, wherein the supply circuitry is coupled to an auxiliary winding of the transformer and configured to provide a supply voltage for the controller circuitry. The controller circuitry is further configured to: transition to a burst mode to switch on and off the current through the primary winding in first bursts, wherein the first bursts are separated by intervals during which switching on and off the current through the primary winding of the transformer by the first bursts is discontinued and provide second bursts during the intervals in order to keep the supply voltage of the controller circuitry between a lower bound value and an upper bound value while the output voltage ramps down to a requested valley value or provide second bursts during the intervals after reaching a timeout limit in order to provide the supply voltage to the controller circuitry while the output voltage ramps down to a requested valley value.
-
公开(公告)号：US20210351707A1
公开(公告)日：2021-11-11
申请号：US17240037
申请日：2021-04-26
Applicant: STMicroelectronics S.r.l.
Inventor： Alberto Bianco , Francesco Ciappa , Giuseppe Scappatura
Abstract: An embodiment provides a circuit including a transformer having a primary winding coupled to an input port configured to receive an input voltage and a secondary winding configured to provide an output voltage at an output port, controller circuitry configured to switch on and off a current through the primary winding so that energy is transferred to the secondary winding while switching and supply circuitry connected to the controller circuitry, wherein the supply circuitry is coupled to an auxiliary winding of the transformer and configured to provide a supply voltage for the controller circuitry. The controller circuitry is further configured to: transition to a burst mode to switch on and off the current through the primary winding in first bursts, wherein the first bursts are separated by intervals during which switching on and off the current through the primary winding of the transformer by the first bursts is discontinued and provide second bursts during the intervals in order to keep the supply voltage of the controller circuitry between a lower bound value and an upper bound value while the output voltage ramps down to a requested valley value or provide second bursts during the intervals after reaching a timeout limit in order to provide the supply voltage to the controller circuitry while the output voltage ramps down to a requested valley value.
-
公开(公告)号：US11128229B2
公开(公告)日：2021-09-21
申请号：US16848736
申请日：2020-04-14
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alberto Bianco , Francesco Ciappa , Giuseppe Scappatura
IPC: H02M3/335
Abstract: The present disclosure relates to solutions for operating a flyback converter comprising an active clamp. The flyback converter comprises two input terminals and two output terminals. A first electronic switch and the primary winding of a transformer are connected in series between the input terminals. An active clamp circuit is connected in parallel with the primary winding. The active clamp circuit comprises a series connection of a clamp capacitor and a second electronic switch. A third electronic switch and the secondary winding of the transformer are connected in series between the two output terminals. In particular, the present disclosure relates to solutions for switching the first, second and third electronic switch in order to achieve a zero-voltage switching of the first electronic switch.
-
公开(公告)号：US20210080491A1
公开(公告)日：2021-03-18
申请号：US17103692
申请日：2020-11-24
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Massimiliano Gobbi , Ignazio Salvatore Bellomo , Domenico Tripodi , Antonio Borrello , Alberto Bianco
IPC: G01R19/165 , G01R19/04
Abstract: An active discharge circuit discharges an X capacitor and includes a sensor circuit that generates a sensor signal indicative of an AC voltage at the X capacitor. A processing unit generates a reset signal as a function of a comparison signal. A comparator circuit generates the comparison signal by comparing the sensor signal with a threshold. A timer circuit sets a discharge enable signal to a first logic level when the timer circuit is reset via a reset signal. The timer circuit determines the time elapsed since the last reset and tests whether the time elapsed exceeds a given timeout value. If the time elapsed exceeds the given timeout value, the timer circuit sets the discharge enable signal to a second logic level. A dynamic threshold generator circuit varies the threshold of the comparator circuit as a function of the sensor signal.
-
-
-
-
-
-
-
-
-
Search Results
37
records
(took 0.017 seconds)
