公开(公告)号：US20170117814A1

公开(公告)日：2017-04-27

申请号：US15344288

申请日：2016-11-04

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Claudio Adragna ,  Giovanni Gritti

IPC: H02M3/335 ,  H02M1/36 ,  H02M1/32 ,  H02M1/08

CPC classification number: H02M3/33523 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M1/42 ,  H02M1/4258 ,  H02M2001/0009 ,  H02M2001/0058

Abstract: The present disclosure is directed to a high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a sinusoidal reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.

公开(公告)号：US09520796B2

公开(公告)日：2016-12-13

申请号：US14572638

申请日：2015-03-06

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Claudio Adragna ,  Giovanni Gritti

IPC: H02M1/08 ,  H02M3/335 ,  H02M1/42

CPC classification number: H02M3/33523 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M1/42 ,  H02M1/4258 ,  H02M2001/0009 ,  H02M2001/0058

Abstract: The present disclosure is directed to a high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a sinusoidal reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.

Abstract translation: 本公开涉及一种高功率因数准谐振转换器。 转换器将交流电源线输入转换为直流输出，为负载（通常为一串LED）供电。 电源输入馈送到由电源开关控制的变压器中。 电源开关由具有整形电路的控制器驱动。 整形电路使用电流发生器，开关电阻和电容器来产生正弦参考电压信号。 控制器根据电压参考信号驱动电源开关，导致变压器初级绕组中的正弦输入电流，导致转换器的功率因数高，总谐波失真低。

公开(公告)号：US09413225B2

公开(公告)日：2016-08-09

申请号：US14549211

申请日：2014-11-20

Applicant: STMicroelectronics S.r.l.

Inventor： Claudia Castelli ,  Claudio Adragna

IPC: H02M1/42 ,  H02M1/00

CPC classification number: H02M1/4208 ,  H02M1/4225 ,  H02M2001/0032 ,  Y02B70/126 ,  Y02B70/16

Abstract: A method controls a power factor correction converter that includes a boost inductor and a switch. The method generates a sense signal representing a rectified AC input voltage or an inductor current through the boost inductor, turns on the switch in response to determining, based on the sense signal, a zero current condition through the boost inductor, turns off the switch after an on-time interval, generates a feedback signal based on an output voltage of the converter, and compares the feedback signal with a threshold. If the feedback signal is smaller than the threshold, the method generates a command signal, representing a phase domain including 0 and π, based on the feedback signal and the power threshold, and keeps the switch off when a phase of the input rectified AC voltage or of the inductor current is in the phase domain even if the zero current condition has been determined.

Abstract translation: 一种方法控制包括升压电感和开关的功率因数校正转换器。 该方法产生表示经过升压电感的整流AC输入电压或电感电流的感测信号，响应于基于感测信号确定通过升压电感器的零电流状态来导通开关，在开关之后关闭开关 导通时间间隔，基于转换器的输出电压产生反馈信号，并将反馈信号与阈值进行比较。 如果反馈信号小于阈值，则该方法基于反馈信号和功率阈值产生表示包括0和π的相位域的指令信号，并且当输入整流AC电压的相位保持关闭 或者电感电流处于相位域，即使已经确定了零电流状态。

公开(公告)号：US20140029316A1

公开(公告)日：2014-01-30

申请号：US13951259

申请日：2013-07-25

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/315 ,  H02M3/335 ,  H02M3/33515 ,  H02M3/33523 ,  Y02B70/1433

Abstract: A method for controlling a switching regulator includes defining a waiting time during which a trigger signal corresponding to a recirculation signal of the switching regulator is ignored holding a control switch in an open condition, and detecting a number of local valleys of the recirculation signal during the waiting time. In particular, defining the waiting time is performed for each switching cycle by adding a first value, which is determined on the basis of a load on the regulator, to a second variable value, which is proportional to the number valleys detected during the waiting time of the preceding switching cycle.

Abstract translation: 用于控制开关调节器的方法包括定义等待时间，在该等待时间期间，与开关调节器的再循环信号相对应的触发信号被忽略，保持控制开关处于打开状态，并且在该期间检测再循环信号的局部谷数 等待的时间。 特别地，通过将​​基于调节器上的负载确定的第一值与在等待时间内检测到的数量谷成正比的第二可变值相加来为每个切换周期执行定义等待时间 的前一个开关周期。