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公开(公告)号：US09356535B2
公开(公告)日：2016-05-31
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 includes 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。
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公开(公告)号：US20130194842A1
公开(公告)日：2013-08-01
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
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。
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公开(公告)号：US11784563B2
公开(公告)日：2023-10-10
申请号：US17244795
申请日：2021-04-29
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alberto Bianco , Giuseppe Scappatura , Francesco Ciappa
Abstract: An electronic device includes a circuit board that manages supply of electricity to the electronic device. The circuit board includes an integrated circuit and an external capacitor coupled to a supply terminal of the circuit board. During a startup operation of the integrated circuit, the integrated circuit supplies a first charging current to charge the capacitor to a supply voltage value. The circuit board includes a boost circuit that receives a portion of the first charging current and outputs a second charging current that augments charging of the capacitor. The second charging current is an amplification of the first charging current. The integrated circuit enables operation of the electronic device after the capacitor is charged to the supply voltage value.
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公开(公告)号：US11005361B2
公开(公告)日：2021-05-11
申请号：US16445818
申请日：2019-06-19
Applicant: STMicroelectronics S.r.l.
Inventor： Giuseppe Scappatura , Alberto Bianco , Francesco Ciappa
Abstract: A control circuit is configured to control a power factor correction (PFC) pre-regulator including a power switch and being configured to operate in a transition mode of operation and a valley-skipping mode of operation. The control circuit generates a drive signal to control a switching of the power switch based on a current threshold. A current threshold generator in the control circuit is configured to modulate the current threshold as a function of a number of valleys skipped in the valley-skipping mode of operation.
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公开(公告)号：US20190097540A1
公开(公告)日：2019-03-28
申请号：US16129377
申请日：2018-09-12
Applicant: STMicroelectronics S.r.l.
Inventor： Gabriele Gherdovich , Alberto Bianco , Giuseppe Scappatura
CPC classification number: H02M3/33507 , H01L24/97 , H02M1/08 , H02M1/36 , H02M3/33523 , H02M3/33592
Abstract: A controller circuit for an AC-DC converter includes a first controller circuit block configured to drive one or more switches at the primary side of a transformer in the AC-DC converter. A second controller circuit block is configured to sense, at a secondary side of the transformer in said AC-DC converter, a secondary side signal indicative of the output signal from said AC-DC converter. The second controller circuit block generates switching control signals for the first controller circuit block as a function of the secondary side signal. An isolator circuit block between the first controller circuit block and the second controller circuit block includes an isolated transmission channel of the switching control signals from the second controller circuit block to the first controller circuit block.
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Patent Agency Ranking
公开(公告)号：US10211744B2
公开(公告)日：2019-02-19
申请号：US15595577
申请日：2017-05-15
Applicant: STMICROELECTRONICS S.r.l.
Inventor： Alberto Bianco , Giuseppe Scappatura
Abstract: A method and apparatus for secondary side current mode control of a converter are provided. In the method and apparatus, an output voltage of the converter is detected, where the converter has primary and secondary windings that are galvanically isolated in respective primary and secondary sides. A secondary control signal is generated in the secondary side based at least in part on the output voltage and a reference voltage. The secondary control signal is converted to a primary control signal provided in the primary side. The converter is driven in the primary side based at least in part on the primary control signal and a current sense signal indicative of a current flowing through the primary winding.
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公开(公告)号：US20180191252A1
公开(公告)日：2018-07-05
申请号：US15399335
申请日：2017-01-05
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alberto Bianco , Marco Dell'Oro , Giuseppe Scappatura , Luca Longhi , Matteo Sucameli , Dino Ciambellotti
CPC classification number: H02M3/33507 , H02M1/08 , H02M3/33569 , H02M3/3376 , H02M2001/0009 , H02M2001/0054 , Y02B70/1433 , Y02B70/1491
Abstract: A control circuit controls a switching circuit of a resonant converter where the switching circuit includes first and second power switches. A first on time of the first power switch and a second on time of the second power switch are controlled to generate a square wave signal to drive the resonant circuit. The control circuit controls the first on time based on a zero current detection time indicating detection of a zero current crossing of a resonant current generated in the resonant circuit in response to the square wave signal and on a time shift delay time based on an output voltage of the resonant converter. The second on time of the second power switch control is based on the zero current detection time detected for the first power switch and on the time shift delay time.
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18.发明申请DETECTION CIRCUIT FOR AN ACTIVE DISCHARGE CIRCUIT OF AN X-CAPACITOR, RELATED ACTIVE DISCHARGE CIRCUIT, INTEGRATED CIRCUIT AND METHOD 审中-公开用于X电容器的有源放电电路的检测电路，相关的主动放电电路，集成电路和方法公开(公告)号：US20160124029A1
公开(公告)日：2016-05-05
申请号：US14838125
申请日：2015-08-27
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Massimiliano Gobbi , Ignazio Salvatore Bellomo , Domenico Tripodi , Antonio Borrello , Alberto Bianco
IPC: G01R19/165 , H02J7/00 , G01R19/04
CPC classification number: G01R19/16557 , G01R19/04 , H02J7/0072 , H02J7/345 , H02M2001/322
Abstract: An active discharge circuit discharges an X. The detection circuit includes a sensor circuit that generates a sensor signal indicative of an AC oscillation voltage at the X capacitor. The detection circuit also includes a processing unit that generates the 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.
Abstract translation: 有源放电电路对X放电。检测电路包括传感器电路，其生成表示X电容器处的交流振荡电压的传感器信号。 检测电路还包括根据比较信号产生复位信号的处理单元。 比较器电路通过将传感器信号与阈值进行比较来生成比较信号。 当定时器电路通过复位信号复位时，定时器电路将放电使能信号设置为第一逻辑电平。 定时器电路确定自上次复位以来经过的时间，并测试经过的时间是否超过给定的超时值。 如果经过的时间超过给定的超时值，则定时器电路将放电使能信号设置为第二逻辑电平。 动态阈值发生器电路根据传感器信号改变比较器电路的阈值。
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公开(公告)号：US11870361B2
公开(公告)日：2024-01-09
申请号：US17475017
申请日：2021-09-14
Applicant: STMicroelectronics S.r.l.
Inventor： Alberto Bianco , Francesco Ciappa , Giuseppe Scappatura
IPC: H02M3/335
CPC classification number: H02M3/33592
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.
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公开(公告)号：US10686382B2
公开(公告)日：2020-06-16
申请号：US15399335
申请日：2017-01-05
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alberto Bianco , Marco Dell'Oro , Giuseppe Scappatura , Luca Longhi , Matteo Sucameli , Dino Ciambellotti
Abstract: A control circuit controls a switching circuit of a resonant converter where the switching circuit includes first and second power switches. A first on time of the first power switch and a second on time of the second power switch are controlled to generate a square wave signal to drive the resonant circuit. The control circuit controls the first on time based on a zero current detection time indicating detection of a zero current crossing of a resonant current generated in the resonant circuit in response to the square wave signal and on a time shift delay time based on an output voltage of the resonant converter. The second on time of the second power switch control is based on the zero current detection time detected for the first power switch and on the time shift delay time.
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