公开(公告)号：US20220159807A1

公开(公告)日：2022-05-19

申请号：US17523641

申请日：2021-11-10

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics Application GmbH ,  STMicroelectronics Design and Application S.R.O.

Inventor： Donato TAGLIAVIA ,  Vincenzo POLISI ,  Calogero Andrea TRECARICHI ,  Francesco Nino MAMMOLITI ,  Jochen BARTHEL ,  Ludek BERAN

IPC: H05B45/46 ,  H05B45/38

Abstract: A control circuit for a voltage source generates a reference signal for a voltage source, wherein the reference signal indicates a requested output voltage to be generated by the voltage source. A digital feed-forward control circuit computes a digital feed-forward regulation value indicative of a requested output voltage by determining a maximum voltage drop at strings of solid-state light sources. A digital feed-back control circuit determines a minimum voltage drop for current regulators/limiters for the strings and determines a digital feed-back correction value as a function of the minimum voltage drop. The control circuit then sets the reference signal after a start-up as a function of the digital feed-forward regulation value and corrects the reference signal as a function of the digital feed-back correction value.

公开(公告)号：US20160352222A1

公开(公告)日：2016-12-01

申请号：US14970836

申请日：2015-12-16

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Donato TAGLIAVIA ,  Calogero Andrea TRECARICHI

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M1/32 ,  H02M3/155 ,  H02M3/157 ,  H02M2001/0009 ,  H02M2001/325

Abstract: A method includes generating a control signal for controlling a switch element, and determining at each switching cycle alternation of an ON interval with storage of energy in the inductor element starting from an input voltage, and an OFF interval with transfer of the energy stored in an inductor element into a storage element on which an output voltage is present. The method includes when the inductor current reaches the first threshold value before the end of a first interval, determining the end of the ON interval at the end of the first interval. The method includes following detection of the ON interval having a duration equal to the first interval, the detection being indicative of a possible short-circuit condition at output, determining the OFF interval having a second duration equal to a lengthened interval longer than the first duration.

Abstract translation: 一种方法包括产生用于控制开关元件的控制信号，并且在每个开关周期处确定开始间隔的交替，其中从输入电压开始存储电感器元件中的能量，以及在存储在 电感器元件插入到其上存在输出电压的存储元件中。 该方法包括当电感电流在第一间隔结束之前达到第一阈值时，确定在第一间隔结束时接通间隔的结束。 该方法包括以下检测具有等于第一间隔的持续时间的ON间隔，该检测指示输出处可能的短路状态，确定具有等于长于第一持续时间的延长间隔的第二持续时间的OFF间隔 。