-
公开(公告)号：US20150137700A1
公开(公告)日：2015-05-21
申请号：US14085765
申请日：2013-11-20
Applicant: Texas Instruments Incorporated
Inventor： David Wayne Evans , Kevin Scoones , James Larry Krug , Pradeep Katikaneni
IPC: H05B33/08
CPC classification number: H05B33/0815 , H05B33/0827 , Y10T307/406
Abstract: Systems and methods of driving multiple outputs are provided in which a single inductor may be used to drive multiple output such as independent strings of LEDs or white LEDs (WLEDs). In an example embodiment, a boost DC to DC converter may be used with a single inductor to drive multiple outputs. In an example embodiment, the error voltage of each of the multiple outputs is sampled during each cycle of the DC to DC converter and the largest error voltage is determined for that cycle. Power from the DC to DC converter is then supplied to that output during that cycle.
Abstract translation: 提供了驱动多个输出的系统和方法，其中可以使用单个电感器来驱动多个输出，例如独立的LED串或白色LED（WLED）。 在示例性实施例中，升压DC-DC转换器可以与单个电感器一起用于驱动多个输出。 在一个示例实施例中，在DC-DC转换器的每个周期期间对多个输出中的每一个的误差电压进行采样，并确定该周期的最大误差电压。 在该周期期间，从DC到DC转换器的电力被提供给该输出。
-
公开(公告)号：US20250048028A1
公开(公告)日：2025-02-06
申请号：US18362265
申请日：2023-07-31
Applicant: Texas Instruments Incorporated
Inventor： Pourya Assem , Kevin Scoones , Pavol Balaz , Tim Merkin , Zejian Wang , Jianquan Liao
IPC: H04R3/02
Abstract: An apparatus includes a first power stage circuit having a first output and a power terminal, and a second power stage circuit having a second output and the power terminal. The apparatus further includes a control circuit having a control input, a first control output, and a second control output. In an example, the control input is coupled to the power terminal, the first control output is coupled to the first output, and the second control output is coupled to the second output. In an example, the control circuit is configured to, responsive to a first voltage at the power terminal being below a threshold voltage, set the first and second outputs to a second voltage.
-
23.发明公开公开(公告)号：US20240146267A1
公开(公告)日：2024-05-02
申请号：US18187870
申请日：2023-03-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Chienyu Huang , Peng Cao , Kevin Scoones
IPC: H03F3/45
CPC classification number: H03F3/45475 , H03F2200/375
Abstract: The techniques and circuits, described herein, include solutions for auto-zeroing in auto-zero amplifiers in the presence of high frequency alternating current (AC) noise. In some aspects, first and second inputs of an auto-zero amplifier are coupled to a differential voltage with high AC noise. During an auto-zero phase, a first switching network decouples the inputs of a first amplifier, comprised within the auto-zero amplifier, from the differential voltage with high AC noise. In some examples, the inputs of the first amplifier may be connected to a regulated direct current (DC) voltage. The regulated DC voltage provides a more accurate auto-zero for the auto-zero amplifier, such that higher overall accuracy is achieved during an operation phase.
-
公开(公告)号：US10778029B2
公开(公告)日：2020-09-15
申请号：US16664417
申请日：2019-10-25
Applicant: Texas Instruments Incorporated
Inventor： Siew Hoon , Kevin Scoones , Jairo D. Olivares , Kai Zhu
IPC: H02J7/00 , H03K17/687 , H03K19/0185 , H03K17/06 , H03K17/12 , H02M3/00
Abstract: A driver circuit includes two high-side switches and a single low-side switch, output inductor, and output capacitor. By having multiple high-side switches, the driver can regulate power from multiple charging devices. The high-side switches share a channel with an input capacitor for that channel and the channels are connected to the low-side switch at a common node. When the capacitor for one of the channels becomes charged quickly, the capacitor of the other channel will balance itself with the charged capacitor. To avoid damaging the high-side switches, a low-impedance bridge and driver circuit is connected between the channels.
-
公开(公告)号：US20190058397A1
公开(公告)日：2019-02-21
申请号：US15858626
申请日：2017-12-29
Applicant: Texas Instruments Incorporated
Inventor： Orlando Lazaro , Kevin Scoones , Alvaro Aguilar , Jeffrey Anthony Morroni , Reza Sharifi
Abstract: In described examples of methods and control circuitry to control a multi-level power conversion system, the control circuitry generates PWM signals having a duty cycle to control an output signal. The duty cycle is adjustable in different switching cycles. Each switching cycle includes a respective first sub-cycle with a first sub-cycle duration and a respective second sub-cycle with a second sub-cycle duration. The control circuitry controls a given switching cycle's first and second sub-cycle durations to control a voltage across a capacitor of the power conversion system while maintaining the given switching cycle's duty cycle.
-
Patent Agency Ranking
公开(公告)号：US09692301B2
公开(公告)日：2017-06-27
申请号：US14801513
申请日：2015-07-16
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Reza Sharifi , Kevin Scoones , Orlando Lazaro
CPC classification number: H02M3/158 , H02M1/14 , H02M2001/0032 , Y02B70/16
Abstract: A voltage converter includes a high side transistor, a low side transistor coupled to the high side transistor at a switching node, and an inductor coupled to the switching node and providing an output node. A controller is provided that is coupled to the high side transistor and the low side transistor. The controller is configured to selectively turn on and off the high and low side transistors in a repeat cycle. The controller is configured to control the high and low side transistors to cause a sequence of packets of charge to be delivered to the inductor. Also included is an adaptive timer circuit coupled to the output node and the controller and configured to adaptively adjust the amount of charge in each packet based on the voltage ripple of the output node.
-
公开(公告)号：US20250112600A1
公开(公告)日：2025-04-03
申请号：US18476825
申请日：2023-09-28
Applicant: Texas Instruments Incorporated
Inventor： Pourya Assem , Yogesh Ramadass , Kevin Scoones , Tim Merkin , Zejian Wang , Jianquan Liao , Yinglai Xia
Abstract: An apparatus includes a first power stage circuit having a first output and a power terminal, and a second power stage circuit having a second output and the power terminal. The apparatus further includes a control circuit having a control input, a first control output, and a second control output. In an example, the control input is coupled to the power terminal, the first control output is coupled to the first output, and the second control output is coupled to the second output. In an example, the control circuit is configured to, responsive to a first voltage at the power terminal being below a threshold voltage, set the first and second outputs to a second voltage.
-
公开(公告)号：US20240364219A1
公开(公告)日：2024-10-31
申请号：US18452175
申请日：2023-08-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kevin Scoones , Youngbok Kim , Orlando Lazaro , Reza Sharifi
Abstract: A power converter includes a power stage circuit having a control input and an output. A pulse width modulation (PWM) controller has a control output coupled to the control input of the power stage. A compensator includes a passive component and a switch coupled to the passive component. The switch has a switch control input coupled to the control output of the PWM controller.
-
公开(公告)号：US20190058398A1
公开(公告)日：2019-02-21
申请号：US15909078
申请日：2018-03-01
Applicant: Texas Instruments Incorporated
Inventor： Reza Sharifi , Kevin Scoones , Orlando Lazaro , Alvaro Aguilar
CPC classification number: H02M3/158 , G05F1/562 , G05F1/595 , H02M1/08 , H02M1/36 , H02M3/06 , H02M3/156 , H02M2001/0009 , H02M2001/0025 , H02M2003/1566
Abstract: In described examples of methods and control circuitry to control a power conversion system, a regulator circuit is coupled to provide switching control signals according to a regulation signal to operate a plurality of converter switches to generate a voltage signal at a switching node. A compensation sense circuit is coupled to provide a compensation pulse signal having a duty cycle that represents a percentage of time that a current flowing through the switching node is above a threshold value. A current compensation circuit adjusts the regulation signal according to the compensation pulse signal.
-
公开(公告)号：US10075080B1
公开(公告)日：2018-09-11
申请号：US15697275
申请日：2017-09-06
Applicant: Texas Instruments Incorporated
Inventor： Kevin Scoones , Orlando Lazaro , Alvaro Aguilar , Jeffrey Anthony Morroni , Reza Sharifi , Saurav Bandyopadhyay
CPC classification number: H02M3/1588 , H02M3/158 , H02M7/483 , H02M2001/0006
Abstract: In a described example, an apparatus includes a first switch coupled between a terminal for receiving an input voltage and a top plate node, and having a first control terminal; a second switch coupled between the top plate node and a switching node, and having a second control terminal; a third switch coupled between the switching node and a bottom plate node and having a third control terminal; a fourth switch coupled between the bottom plate node and a ground terminal, and having a fourth control terminal; a flying capacitor coupled between the top plate node and the bottom plate node; a fifth switch coupled between the top plate node and an auxiliary node; a sixth switch coupled between the auxiliary node and the bottom plate node; and an auxiliary capacitor coupled between the auxiliary control terminal and a ground terminal.
-
-
-
-
-
-
-
-
-
Search Results
31
records
(took 0.018 seconds)
