公开(公告)号：US20150270776A1

公开(公告)日：2015-09-24

申请号：US14222430

申请日：2014-03-21

Applicant: STMicroelectronics International N.V.

Inventor： Ranajay Mallik ,  Jitendra Jain

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M2001/0025 ,  Y10T307/406

Abstract: One embodiment of a power management system includes a reservoir configured to collect energy. The system also includes a voltage regulator coupled to the reservoir via an input terminal and configured to convert the energy to an output voltage via an output terminal when enabled. A threshold detector is coupled to the reservoir and is configured to sense the energy and enable the voltage regulator when the energy exceeds a threshold. The system further includes a feedback circuit coupled between the output terminal and the threshold detector, and configured to feedback the output voltage to the threshold detector to compensate for a voltage drop across the threshold detector due to an output current drawn by the load.

Abstract translation: 电力管理系统的一个实施例包括构造成收集能量的储存器。 该系统还包括经由输入端子耦合到储存器的电压调节器，并经配置以在使能时经由输出端子将能量转换成输出电压。 阈值检测器耦合到储存器并且被配置为当能量超过阈值时感测能量并启用电压调节器。 该系统还包括耦合在输出端和阈值检测器之间的反馈电路，并被配置为将输出电压反馈到阈值检测器，以补偿由负载引起的输出电流引起的阈值检测器两端的电压降。

公开(公告)号：US20250055376A1

公开(公告)日：2025-02-13

申请号：US18232185

申请日：2023-08-09

Applicant: STMicroelectronics International N.V.

Inventor： Ranajay Mallik ,  Akshat Jain

IPC: H02M3/335 ,  H02M1/00 ,  H02M3/00 ,  H02M7/5387

Abstract: According to an embodiment, an LLC resonant converter includes a switching bridge having a plurality of power switches. The switching bridge is configured to receive a DC voltage input and generate a square waveform based on a pulse-modulated frequency (PFM) signal at the switching bridge. The LLC resonant converter further includes a resonant tank circuit coupled to the switching bridge. The resonant tank circuit includes a resonant inductor. The resonant tank circuit is excited in response to receiving the square waveform. The PFM signal is adjusted such that an elapsed time between a rising edge of a Drain-Source Voltage of a power switch and a zero-crossing point of current flowing through the resonant inductor falls within a predetermined range corresponding to the resonant tank circuit operating at its resonant frequency.

公开(公告)号：US10405384B2

公开(公告)日：2019-09-03

申请号：US16106593

申请日：2018-08-21

Applicant: STMicroelectronics International N.V.

Inventor： Akshat Jain ,  Ranajay Mallik

IPC: H05B33/08 ,  H02M3/15 ,  H02M1/08 ,  H02M3/156 ,  H02M1/00

Abstract: A circuit includes a voltage converter converting source voltage to supply voltage at a first node as a function of a feedback voltage at a feedback node. A first output path is coupled between first and second node nodes. Feedback circuitry couples the second node to the feedback node when a voltage at the second node exceeds a first overvoltage, in a first mode of operation. The feedback circuitry couples the second node to the feedback node when the voltage at the second node exceeds a second overvoltage less than the first overvoltage, in a second mode of operation. Impedance circuitry is coupled between the first node and a third node and generates an auxiliary supply voltage and an auxiliary ground voltage when the circuit is in both the first and second modes, the auxiliary supply voltage being less than the supply voltage in both the first and second modes.

公开(公告)号：US20190059135A1

公开(公告)日：2019-02-21

申请号：US16106593

申请日：2018-08-21

Applicant: STMicroelectronics International N.V.

Inventor： Akshat Jain ,  Ranajay Mallik

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M1/08 ,  H02M3/156 ,  H02M2001/0006 ,  H02M2001/0025 ,  H02M2001/0032 ,  H05B33/0809 ,  H05B33/0851

Abstract: A circuit includes a voltage converter converting source voltage to supply voltage at a first node as a function of a feedback voltage at a feedback node. A first output path is coupled between first and second node nodes. Feedback circuitry couples the second node to the feedback node when a voltage at the second node exceeds a first overvoltage, in a first mode of operation. The feedback circuitry couples the second node to the feedback node when the voltage at the second node exceeds a second overvoltage less than the first overvoltage, in a second mode of operation. Impedance circuitry is coupled between the first node and a third node and generates an auxiliary supply voltage and an auxiliary ground voltage when the circuit is in both the first and second modes, the auxiliary supply voltage being less than the supply voltage in both the first and second modes.

公开(公告)号：US20130169696A1

公开(公告)日：2013-07-04

申请号：US13708604

申请日：2012-12-07

Applicant: STMICROELECTRONICS INTERNATIONAL N.V.

Inventor： Nishant Omar ,  Ranajay Mallik

IPC: G09G3/34

CPC classification number: G09G3/3413 ,  G06F3/1446 ,  G09G3/32

Abstract: A display panel comprises an array of light elements arranged in n rows by m columns. At least one driver is configured to drive one of said columns and rows, wherein the or each driver is configured to drive each of said columns or said rows. A plurality of the display panels may be used together to form a display panel system.

Abstract translation: 显示面板包括以n行×m列排列的光元件阵列。 至少一个驱动器被配置为驱动所述列和行之一，其中所述或每个驱动器被配置为驱动所述列或所述行中的每一个。 多个显示面板可以一起使用以形成显示面板系统。