-
公开(公告)号：US11685280B2
公开(公告)日：2023-06-27
申请号：US17175143
申请日：2021-02-12
Applicant: STMicroelectronics International N.V.
Inventor： Ranajay Mallik
CPC classification number: B60L53/62 , H02M3/33576 , B60L2210/10
Abstract: A DC-DC converter includes an inverter converting a DC supply voltage to a time varying signal. A transformer has a primary winding coupled to the inverter through an LC-tank circuit. A diode structure includes a first diode pair coupled in series between a high-voltage bus and a negative output, and a second diode pair coupled in series between the high-voltage bus and the negative output. The transformer has a secondary winding with a first terminal coupled to a tap between the first diode pair and a second terminal coupled to a tap between the second diode pair. A high-voltage bus transistor selectively couples the high-voltage bus to a positive output in response to a high-voltage bus gate drive signal. A low-voltage bus transistor selectively couples a low-voltage bus at a center tap of the secondary winding to the positive output in response to a low-voltage bus gate drive signal.
-
公开(公告)号：US10716186B2
公开(公告)日：2020-07-14
申请号：US16514275
申请日：2019-07-17
Applicant: STMicroelectronics International N.V.
Inventor： Akshat Jain , Ranajay Mallik
Abstract: A circuit includes a voltage converter converting a source voltage to a supply voltage at a first node as a function of a feedback voltage at a feedback node. A first output path is coupled between the first node and a second node. Feedback circuitry compares the voltage at the second node to first and second overvoltages, and selectively couples the second node to the feedback node based thereupon. Impedance circuitry is coupled between the first node and a third node. A light emitting diode (LED) chain is coupled to the third node, and is selectively turned on and off as a function of the selective coupling of the second node to the feedback node by the feedback circuitry.
-
公开(公告)号：US09627967B2
公开(公告)日：2017-04-18
申请号：US14222430
申请日：2014-03-21
Applicant: STMicroelectronics International N.V.
Inventor： Ranajay Mallik , Jitendra Jain
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.
-
公开(公告)号：US20160105017A1
公开(公告)日：2016-04-14
申请号：US14509427
申请日：2014-10-08
Inventor： Ranajay Mallik , Luigi Abbatelli , Giuseppe Catalisano , Akshat Jain
CPC classification number: H02H7/205 , H02H1/0007 , H03K17/0828 , H03K17/166 , H03K17/168 , H05B6/062
Abstract: A drive transistor is connected to a resonant load in a low-side drive configuration. The voltage across the conduction terminals of the drive transistor is sensed and compared to an over-voltage threshold. An over-voltage signal is asserted in response to the comparison. The drive transistor is controlled by a PWM control signal in normal mode. In response to the assertion of the over-voltage signal, the drive transistor is forced to turn on (irrespective of the PWM control signal) to relieve the over-voltage condition. Operation of the circuit may be disabled or forced into soft start mode in response to the assertion of the over-voltage signal. Additionally, the pulse width of the PWM control signal may be reduced in response to the assertion of the over-voltage signal.
Abstract translation: 驱动晶体管以低侧驱动配置连接到谐振负载。 检测驱动晶体管的导通端子两端的电压并将其与过电压阈值进行比较。 响应于比较来断言过电压信号。 驱动晶体管由正常模式下的PWM控制信号控制。 响应于过电压信号的断言，驱动晶体管被强制导通（不管PWM控制信号如何）以减轻过电压状况。 响应于过电压信号的断言，电路的操作可能被禁用或强制进入软启动模式。 此外，可以响应于过电压信号的断言而减小PWM控制信号的脉冲宽度。
-
公开(公告)号：US20170117799A1
公开(公告)日：2017-04-27
申请号：US14923776
申请日：2015-10-27
Applicant: STMicroelectronics International N.V.
Inventor： Jitendra Jain , Ranajay Mallik
CPC classification number: H02M3/04 , H05B33/0815 , H05B33/0827 , H05B33/0845 , H05B33/0887 , Y02B20/347
Abstract: A tunable voltage regulator has an output generating a variable voltage and an input that receives a trimming signal for controlling the output variable voltage. A current regulating circuit operates to regulate a current flowing through a load in response to the variable voltage. A control circuit senses the variable voltage and a drop voltage of the current regulating circuit, and determines whether the current regulating circuit has failed to regulate the current flowing through the load because the variable voltage is too low. In response thereto, the control circuit generates the trimming signal to set the variable voltage to a value sufficient for the current regulating circuit to successfully regulate the current flowing through the load.
-
Patent Agency Ranking
公开(公告)号：US09331474B1
公开(公告)日：2016-05-03
申请号：US14509427
申请日：2014-10-08
Inventor： Ranajay Mallik , Luigi Abbatelli , Giuseppe Catalisano , Akshat Jain
CPC classification number: H02H7/205 , H02H1/0007 , H03K17/0828 , H03K17/166 , H03K17/168 , H05B6/062
Abstract: A drive transistor is connected to a resonant load in a low-side drive configuration. The voltage across the conduction terminals of the drive transistor is sensed and compared to an over-voltage threshold. An over-voltage signal is asserted in response to the comparison. The drive transistor is controlled by a PWM control signal in normal mode. In response to the assertion of the over-voltage signal, the drive transistor is forced to turn on (irrespective of the PWM control signal) to relieve the over-voltage condition. Operation of the circuit may be disabled or forced into soft start mode in response to the assertion of the over-voltage signal. Additionally, the pulse width of the PWM control signal may be reduced in response to the assertion of the over-voltage signal.
Abstract translation: 驱动晶体管以低侧驱动配置连接到谐振负载。 检测驱动晶体管的导通端子两端的电压并将其与过电压阈值进行比较。 响应于比较来断言过电压信号。 驱动晶体管由正常模式下的PWM控制信号控制。 响应于过电压信号的断言，驱动晶体管被强制导通（不管PWM控制信号如何）以减轻过电压状况。 响应于过电压信号的断言，电路的操作可能被禁用或强制进入软启动模式。 此外，可以响应于过电压信号的断言而减小PWM控制信号的脉冲宽度。
-
公开(公告)号：US09083373B2
公开(公告)日：2015-07-14
申请号：US14135156
申请日：2013-12-19
Applicant: STMicroelectronics International, N.V.
Inventor： MunishKumar Mangal , Ranajay Mallik
Abstract: A system and method for decoding quadrature signals includes a quadrature signal generator, a quadrature signal decoder, a key matrix and a driver. The quadrature signal generator generates quadrature signals on rotation. The quadrature signal decoder is configured to convert the quadrature signals into non-overlapping signals. The key matrix is configured to receive the non-overlapping signals. The driver is configured to scan the key matrix to decode the non-overlapping signals to generate an event update corresponding to a direction of rotation of the quadrature signal generator.
Abstract translation: 用于解码正交信号的系统和方法包括正交信号发生器，正交信号解码器，密钥矩阵和驱动器。 正交信号发生器在旋转时产生正交信号。 正交信号解码器被配置为将正交信号转换成非重叠信号。 密钥矩阵被配置为接收不重叠的信号。 驱动器被配置为扫描键矩阵以解码不重叠的信号以产生对应于正交信号发生器的旋转方向的事件更新。
-
8.发明授权公开(公告)号：US11855527B1
公开(公告)日：2023-12-26
申请号：US17834174
申请日：2022-06-07
Applicant: STMicroelectronics International N.V.
Inventor： Ranajay Mallik , Akshat Jain
CPC classification number: H02M1/4216 , H02M1/12 , H02M1/4225 , H02M1/4233 , H02M7/2173 , H02M7/2176 , H02M1/42 , H02M7/217
Abstract: A PFC correction circuit includes first, second, and third phase inputs coupled to three-phase power mains, with a three-phase full-wave rectifying bridge connected to an input node. First, second, and third boost inductors are respectively connected between first, second, and third phase inputs and first, second, and third taps of the three-phase full-wave rectifying bridge. A boost switch is connected between the input node and ground, and a boost diode is connected between the input node and an output node. A multiplier input driver generates a single-phase input signal as a replica of a signal at the three-phase power mains after rectification. A single-phase power factor controller generates a PWM signal from the single-phase input signal. A gate driver generates a gate drive signal from the PWM signal. The boost switch is operated by the gate drive signal.
-
公开(公告)号：US09621031B1
公开(公告)日：2017-04-11
申请号：US14923776
申请日：2015-10-27
Applicant: STMicroelectronics International N.V.
Inventor： Jitendra Jain , Ranajay Mallik
CPC classification number: H02M3/04 , H05B33/0815 , H05B33/0827 , H05B33/0845 , H05B33/0887 , Y02B20/347
Abstract: A tunable voltage regulator has an output generating a variable voltage and an input that receives a trimming signal for controlling the output variable voltage. A current regulating circuit operates to regulate a current flowing through a load in response to the variable voltage. A control circuit senses the variable voltage and a drop voltage of the current regulating circuit, and determines whether the current regulating circuit has failed to regulate the current flowing through the load because the variable voltage is too low. In response thereto, the control circuit generates the trimming signal to set the variable voltage to a value sufficient for the current regulating circuit to successfully regulate the current flowing through the load.
-
公开(公告)号：US09501980B2
公开(公告)日：2016-11-22
申请号：US13708604
申请日：2012-12-07
Applicant: STMicroelectronics International N.V.
Inventor： Nishant Omar , Ranajay Mallik
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。
-
-
-
-
-
-
-
-
-
Search Results
15
records
(took 0.013 seconds)
