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公开(公告)号：US10312799B1
公开(公告)日：2019-06-04
申请号：US15974392
申请日：2018-05-08
发明人： Joel Turchi , Radim Mlcousek , Lukas Olivik
摘要： In one form, a power factor correction (PFC) controller, comprising includes a regulation circuit, a dead-time detection circuit, and a pulse width modulator. The regulation circuit provides a control voltage in response to a feedback voltage received at a feedback input terminal, wherein the feedback voltage is proportional to an output voltage. The dead-time detection circuit has an input coupled to a zero current detection input terminal, and an output for providing a dead-time signal. The pulse width modulator is responsive to the control voltage and the dead-time signal to provide a drive signal that controls conduction of a switch to improve a power factor of an offline converter, wherein the pulse width modulator modulates both an on-time and a switching period of the drive signal using the dead-time signal in a discontinuous conduction mode.
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公开(公告)号：US09787202B2
公开(公告)日：2017-10-10
申请号：US15275888
申请日：2016-09-26
发明人： Joel Turchi
CPC分类号： H02M3/33546 , H02M1/42 , H02M1/4225 , H02M1/44 , H02M2001/0032 , Y02B70/126 , Y02B70/16 , Y02P80/112
摘要： In accordance with an embodiment, a converter includes a power factor controller that varies the switching frequency of a switching transistor in accordance with a signal representative of power at the input of the converter.
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公开(公告)号：US09594099B2
公开(公告)日：2017-03-14
申请号：US14336665
申请日：2014-07-21
发明人： Joel Turchi , Karel Ptacek , Radim Mlcousek
IPC分类号： G01R19/165 , G01R19/00 , G01R31/40
CPC分类号： G01R19/16538 , G01R19/0084 , G01R31/40
摘要： A circuit and method for detecting a brown-out condition and providing a feed-forward transfer function in a power supply circuit. A comparison circuit is coupled to a delay element through a latch. A second delay element is connected between the first delay element and an input of the latch. The output of the first delay element is connected to a clamping circuit via a logic circuit. A first voltage is compared with a reference voltage to generate a comparison voltage, which is transmitted through the latch and the first delay element. The comparison voltage is monitored at an output of the first delay element. A brown-out condition occurs if the comparison voltage being monitored at the output of the first delay element results from the first voltage being less than the reference voltage.
摘要翻译： 一种用于检测欠压状态并在电源电路中提供前馈传递功能的电路和方法。 比较电路通过锁存器耦合到延迟元件。 第二延迟元件连接在第一延迟元件和锁存器的输入端之间。 第一延迟元件的输出通过逻辑电路连接到钳位电路。 将第一电压与参考电压进行比较，以产生通过锁存器和第一延迟元件传输的比较电压。 在第一延迟元件的输出处监视比较电压。 如果在第一延迟元件的输出处监视的比较电压由第一电压小于参考电压导致，则出现欠压条件。
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4.发明申请METHOD FOR REGULATING AN OUTPUT VOLTAGE USING A CONVERTER CONFIGURED TO OPERATE IN A CRITICAL CONDUCTION MODE AND A FREQUENCY FOLD-BACK MODE AND STRUCTURE 有权使用配置在关键导通模式和频率折返模式和结构中运行的转换器来调节输出电压的方法公开(公告)号：US20170012544A1
公开(公告)日：2017-01-12
申请号：US15275888
申请日：2016-09-26
发明人： Joel Turchi
CPC分类号： H02M3/33546 , H02M1/42 , H02M1/4225 , H02M1/44 , H02M2001/0032 , Y02B70/126 , Y02B70/16 , Y02P80/112
摘要： In accordance with an embodiment, a converter includes a power factor controller that varies the switching frequency of a switching transistor in accordance with a signal representative of power at the input of the converter.
摘要翻译： 根据实施例，转换器包括功率因数控制器，其根据代表转换器输入端的功率的信号改变开关晶体管的开关频率。
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公开(公告)号：US20150028916A1
公开(公告)日：2015-01-29
申请号：US14336665
申请日：2014-07-21
发明人： Joel Turchi , Karel Ptacek , Radim Mlcousek
IPC分类号： G01R19/165 , G01R31/40 , G01R19/00
CPC分类号： G01R19/16538 , G01R19/0084 , G01R31/40
摘要： A circuit and method for detecting a brown-out condition and providing a feed-forward transfer function in a power supply circuit. A comparison circuit is coupled to a delay element through a latch. A second delay element is connected between the first delay element and an input of the latch. The output of the first delay element is connected to a clamping circuit via a logic circuit. A first voltage is compared with a reference voltage to generate a comparison voltage, which is transmitted through the latch and the first delay element. The comparison voltage is monitored at an output of the first delay element. A brown-out condition occurs if the comparison voltage being monitored at the output of the first delay element results from the first voltage being less than the reference voltage.
摘要翻译： 一种用于检测欠压状态并在电源电路中提供前馈传递功能的电路和方法。 比较电路通过锁存器耦合到延迟元件。 第二延迟元件连接在第一延迟元件和锁存器的输入端之间。 第一延迟元件的输出通过逻辑电路连接到钳位电路。 将第一电压与参考电压进行比较，以产生通过锁存器和第一延迟元件传输的比较电压。 在第一延迟元件的输出处监视比较电压。 如果在第一延迟元件的输出处监视的比较电压由第一电压小于参考电压导致，则出现欠压条件。
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公开(公告)号：US11233456B2
公开(公告)日：2022-01-25
申请号：US16674115
申请日：2019-11-05
发明人： Christophe Basso , Yann Vaquette , Joel Turchi
摘要： Operating power converters. Some of the methods include: storing energy in a transformer arranged for flyback operation, the storing by making conductive a primary switch coupled to a primary winding of the transformer; and then ceasing the storing of energy; determining on time of the primary switch during the storing of energy, the determining creates a value indicative of charge time; transferring energy from the transformer to a load through a secondary winding of the transformer; measuring discharge time of the energy from the transformer during the transferring, the measuring of the discharge time creates a value indicative of discharge time; calculating a value indicative of output voltage of the power converter using the value indicative of charge time and the value indicative of discharge time; and then compensating a charge time of a subsequent energy storage cycle, the compensation based on the value indicative of output voltage.
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公开(公告)号：US10097082B1
公开(公告)日：2018-10-09
申请号：US15623810
申请日：2017-06-15
发明人： Joel Turchi , Christophe Basso
摘要： An integrated circuit power factor controller includes a pulse width modulator and a line sensing circuit. The pulse width modulator has a first input for receiving a feedback signal, a second input for receiving a line sense signal, and an output for providing a drive signal having a duty cycle formed in response to the feedback signal and the line sense signal. The line sensing circuit has an input for receiving the drive signal, and an output coupled to the second input of the pulse width modulator for providing the line sense signal. The line sensing circuit forms the line sense signal in response to measuring a duty ratio of the drive signal. In another form, an offline converter includes an integrated circuit power factor controller that provides a line sense signal in response to a duty ratio of the drive signal without measuring a voltage on the input line.
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公开(公告)号：US10008924B1
公开(公告)日：2018-06-26
申请号：US15624298
申请日：2017-06-15
发明人： Joel Turchi , Christophe Basso
CPC分类号： H02M1/4208 , H02M1/4225 , H02M7/06 , Y02B70/126 , Y02P80/112
摘要： An integrated circuit power factor controller includes a feedback input terminal for receiving a feedback signal representative of an output voltage, a control terminal for receiving an error signal and adapted to be coupled to a compensation network, a drive terminal for providing a drive signal and adapted to be coupled to a transistor, and a pulse width modulator. The pulse width modulator is coupled to the feedback input terminal, the control terminal, and the drive terminal, and provides the drive signal having a duty cycle formed in response to the feedback signal. The pulse width modulator includes a line sensing multiplier having a first input for receiving the error signal, a second input for receiving the drive signal, and an output for providing a multiplied signal, and the pulse width modulator further provides the drive signal in response to the multiplied signal.
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