专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08779696B2 Low cost LED driver with improved serial bus 有权
公开(公告)号：US08779696B2
公开(公告)日：2014-07-15
申请号：US13346647
申请日：2012-01-09
申请人： Richard Kent Williams , Kevin D'Angelo , David A. Brown
发明人： Richard Kent Williams , Kevin D'Angelo , David A. Brown
IPC分类号： H05B37/02
CPC分类号： H04N5/57 , H05B33/083 , H05B33/0842 , H05B37/0254
摘要： An LED driver IC for driving external strings of LEDs comprises a prefix register and a data register connected in series with each other and with the prefix and data registers in other driver ICs. The prefix and data registers of the driver ICs are connected in a daisy chain arrangement with an interface IC. The interface IC loads data identifying a functional latch into the prefix register and data defining a functional condition into the data register of each driver IC. The data in the data register is then transferred to the functional latch to control the functional condition within the LED driver IC.

2. 发明申请

US20140191740A1 Voltage Converting LED Circuit with Switched Capacitor Network 审中-公开
标题翻译：电压转换LED电路与开关电容网络
公开(公告)号：US20140191740A1
公开(公告)日：2014-07-10
申请号：US12611870
申请日：2009-11-03
申请人： Xiaofan Chen
发明人： Bruno Ferrario , Yun Tung Sien
IPC分类号： H02M3/156 , H05B33/08
CPC分类号： H02M3/156 , H02M1/36 , H05B33/0815 , H05B33/086
摘要： A Voltage Converting LED Circuit with Switched Capacitor Network contains a 2-way MOSFET switch that connects a capacitor network to the output of an error amplifier, thereby enabling the error amplifier to resume operation quickly after the off-time segment of a PWM cycle. The switch is controlled synchronously with current sinks controlling brightness and color levels. In a preferred embodiment, multiple serially connected strings of LED's can be controlled simultaneously via one switch.
摘要翻译：具有开关电容网络的电压转换LED电路包含一个将电容器网络连接到误差放大器的输出的2路MOSFET开关，从而使误差放大器能够在PWM周期的关断时间段之后快速恢复运行。该开关与控制亮度和颜色水平的电流槽同步控制。在优选实施例中，可以通过一个开关同时控制多个串联的LED串。

3. 发明授权

US08749222B2 Method of sensing magnitude of current through semiconductor power device 有权
标题翻译：检测通过半导体功率器件的电流大小的方法
公开(公告)号：US08749222B2
公开(公告)日：2014-06-10
申请号：US13113791
申请日：2011-05-23
申请人： Richard K. Williams
发明人： Richard K. Williams
IPC分类号： G01R19/00 , G01R31/02 , G01R31/26 , G01R1/20 , H01L23/495 , H01L23/00 , H01L29/10
CPC分类号： G01R19/0092 , G01R1/203 , H01L23/49575 , H01L24/03 , H01L24/05 , H01L24/06 , H01L24/16 , H01L24/17 , H01L24/25 , H01L24/45 , H01L24/48 , H01L24/49 , H01L24/73 , H01L27/088 , H01L29/1087 , H01L29/41758 , H01L29/4238 , H01L29/7833 , H01L2224/0401 , H01L2224/04042 , H01L2224/05093 , H01L2224/05558 , H01L2224/05599 , H01L2224/0603 , H01L2224/13099 , H01L2224/16145 , H01L2224/45144 , H01L2224/48091 , H01L2224/48137 , H01L2224/48247 , H01L2224/48464 , H01L2224/48599 , H01L2224/49111 , H01L2224/49171 , H01L2224/73207 , H01L2224/73257 , H01L2224/85399 , H01L2924/00014 , H01L2924/01004 , H01L2924/01005 , H01L2924/01006 , H01L2924/01013 , H01L2924/01014 , H01L2924/01015 , H01L2924/01019 , H01L2924/01022 , H01L2924/01023 , H01L2924/01027 , H01L2924/01029 , H01L2924/01033 , H01L2924/01047 , H01L2924/01074 , H01L2924/01075 , H01L2924/01078 , H01L2924/01079 , H01L2924/01082 , H01L2924/01083 , H01L2924/014 , H01L2924/10253 , H01L2924/12032 , H01L2924/12035 , H01L2924/1301 , H01L2924/13034 , H01L2924/1305 , H01L2924/13055 , H01L2924/1306 , H01L2924/13062 , H01L2924/13063 , H01L2924/13091 , H01L2924/14 , H01L2924/15747 , H01L2924/181 , H01L2924/19041 , H01L2924/19042 , H01L2924/19043 , H01L2924/30105 , H01L2924/30107 , H01L2924/3011 , H01L2924/3025 , H02M2001/0009 , H03K17/0822 , H03K17/18 , H03K2217/0027 , H01L2924/00 , H01L2924/00012
摘要： A cascode current sensor includes a main MOSFET and a sense MOSFET. The drain terminal of the main MOSFET is connected to a power device whose current is to be monitored, and the source and gate terminals of the main MOSFET are connected to the source and gate terminals, respectively, of the sense MOSFET. The drain voltages of the main and sense MOSFETs are equalized, in one embodiment by using a variable current source and negative feedback. The gate width of the main MOSFET is typically larger than the gate width of the sense MOSFET. Using the size ratio of the gate widths, the current in the main MOSFET is measured by sensing the magnitude of the current in the sense MOSFET. Inserting the relatively large MOSFET in the power circuit minimizes power loss.
摘要翻译：共源共栅电流传感器包括主MOSFET和感测MOSFET。主MOSFET的漏极端子连接到要监视其电流的功率器件，并且主MOSFET的源极和栅极端子分别连接到感测MOSFET的源极和栅极端子。在一个实施例中，通过使用可变电流源和负反馈来使主感测MOSFET和感测MOSFET的漏极电压相等。主MOSFET的栅极宽度通常大于读出MOSFET的栅极宽度。使用栅极宽度的尺寸比，通过感测MOSFET中电流的大小来测量主MOSFET中的电流。在电源电路中插入相对较大的MOSFET可以最大限度地减少功耗。

4. 发明申请

US20130313996A1 High Current Switching Converter for LED Applications 有权
标题翻译：用于LED应用的高电流开关转换器
公开(公告)号：US20130313996A1
公开(公告)日：2013-11-28
申请号：US12194411
申请日：2008-08-19
申请人： Richard Williams
发明人： Richard Williams
IPC分类号： H02M3/158 , H05B37/02
CPC分类号： H02M3/158 , H05B33/0815 , H05B37/02
摘要： A step-up switching voltage regulator includes two or more inductors and a switching network. A control circuit drives the switching network in a repeating sequence that includes: a magnetizing phase where the inductors are connected in series between an input voltage and ground; and a charge transfer phase where the inductors are connected in parallel to provide current to an output node with at least one of the inductors is connected between ground and the output node.
摘要翻译：升压开关电压调节器包括两个或更多个电感器和开关网络。控制电路以重复序列驱动交换网络，该重复序列包括：电感器串联连接在输入电压和地之间的磁化阶段; 以及电荷转移阶段，其中电感器并联连接以向输出节点提供电流，其中至少一个电感器连接在地和输出节点之间。

5. 发明申请

US20130147372A1 Serial Lighting Interface With Embedded Feedback 有权
标题翻译：具有嵌入式反馈的串行照明接口
公开(公告)号：US20130147372A1
公开(公告)日：2013-06-13
申请号：US13347669
申请日：2012-01-10
申请人： Richard K. Williams , Kevin D'Angelo , David A. Brown
发明人： Richard K. Williams , Kevin D'Angelo , David A. Brown
IPC分类号： H05B37/00
CPC分类号： H05B33/083 , H05B33/0815 , H05B33/0827 , H05B33/086 , H05B37/0254 , Y02B20/32
摘要： A system for controlling multiple strings of LEDs includes a group of LED driver ICs, each of which includes a current sense feedback (CSFB) sample latch for storing a digital representation of the forward-voltage drop across a controlled LED string. Each CSFB latch is coupled to a register within a serial lighting interface (SLI) bus that both originates and terminates at an interface IC. As the data on the SLI bus is shifted into the interface IC, the interface IC selects the CSFB word that represents the highest forward-voltage drop of any of the controlled LED strings, which is then used by the interface IC to generate a CSFB signal for setting the appropriate supply voltage for the controlled LED strings.
摘要翻译：用于控制多串LED的系统包括一组LED驱动器IC，每个LED驱动器IC包括用于存储跨受控LED串的正向压降的数字表示的电流检测反馈（CSFB）采样锁存器。每个CSFB锁存器耦合到串行照明接口（SLI）总线中的寄存器，两者都在接口IC处发起并终止。随着SLI总线上的数据被转移到接口IC中，接口IC选择表示任何受控LED串的最高正向压降的CSFB字，然后由接口IC用于产生一个CSFB信号用于设置受控LED串的适当电源电压。

6. 发明申请

US20130147371A1 Serial Lighting Interface With Embedded Feedback 有权
标题翻译：具有嵌入式反馈的串行照明接口
公开(公告)号：US20130147371A1
公开(公告)日：2013-06-13
申请号：US13347668
申请日：2012-01-10
申请人： Richard K. Williams , Kevin D'Angelo , David A. Brown
发明人： Richard K. Williams , Kevin D'Angelo , David A. Brown
IPC分类号： H05B37/00
CPC分类号： H05B33/083 , H05B33/0815 , H05B33/0827 , H05B33/086 , H05B37/0254 , Y02B20/32
摘要： A system for controlling multiple strings of LEDs includes a group of LED driver IC's, each of which includes a current sense feedback (CSFB) sample latch for storing a digital representation of the forward-voltage drop across a controlled LED string. Each CSFB latch is coupled to a register within a serial lighting interface (SLI) bus that both originates and terminates at an interface IC. As the data on the SLI bus is shifted into the interface IC, the interface IC selects the CSFB word that represents the highest forward-voltage drop of any of the controlled LED strings, which is then used by the interface IC to generate a CSFB signal for setting the appropriate supply voltage for the controlled LED strings.
摘要翻译：用于控制多串LED的系统包括一组LED驱动器IC，每组LED驱动器IC包括用于存储跨受控LED串的正向压降的数字表示的电流检测反馈（CSFB）采样锁存器。每个CSFB锁存器耦合到串行照明接口（SLI）总线中的寄存器，两者都在接口IC处发起并终止。随着SLI总线上的数据被转移到接口IC中，接口IC选择表示任何受控LED串的最高正向压降的CSFB字，然后由接口IC用于产生一个CSFB信号用于设置受控LED串的适当电源电压。

7. 发明申请

US20130147370A1 Serial Lighting Interface With Embedded Feedback 有权
公开(公告)号：US20130147370A1
公开(公告)日：2013-06-13
申请号：US13346659
申请日：2012-01-09
申请人： Richard K. Williams , Kevin D'Angelo , David A. Brown
发明人： Richard K. Williams , Kevin D'Angelo , David A. Brown
IPC分类号： H05B37/00
CPC分类号： H05B33/083 , H05B33/0815 , H05B33/0827 , H05B33/086 , H05B37/0254 , Y02B20/32
摘要： A system for controlling multiple strings of LEDs includes a group of LED driver ICs, each of which includes a current sense feedback (CSFB) sample latch for storing a digital representation of the forward-voltage drop across a controlled LED string. Each CSFB latch is coupled to a register within a serial lighting interface (SLI) bus that both originates and terminates at an interface IC. As the data on the SLI bus is shifted into the interface IC, the interface IC selects the CSFB word that represents the highest forward-voltage drop of any of the controlled LED strings, which is then used by the interface IC to generate a CSFB signal for setting the appropriate supply voltage for the controlled LED strings.

8. 发明申请

US20130043595A1 Semiconductor Package Containing Silicon-On-Insulator Die Mounted In Bump-On-Leadframe Manner To Provide Low Thermal Resistance 有权
标题翻译：包含硅绝缘体的半导体封装以引脚框架方式安装，以提供低热阻
公开(公告)号：US20130043595A1
公开(公告)日：2013-02-21
申请号：US13210592
申请日：2011-08-16
申请人： Richard K. Williams
发明人： Richard K. Williams
IPC分类号： H01L23/48
CPC分类号： H01L23/49811 , H01L23/3107 , H01L23/4334 , H01L23/49551 , H01L23/49555 , H01L23/49572 , H01L24/73 , H01L2224/16145 , H01L2224/16245 , H01L2224/32245 , H01L2224/48247 , H01L2224/48257 , H01L2224/48464 , H01L2224/73265 , H01L2924/1305 , H01L2924/13091 , H01L2924/181 , H01L2924/00012 , H01L2924/00
摘要： Thermal transfer from a silicon-on-insulator (SOI) die is improved by mounting the die in a bump-on-leadframe manner in a semiconductor package, with solder or other metal bumps connecting the active layer of the SOI die to metal leads used to mount the package on a printed circuit board or other support structure.
摘要翻译：通过以半导体封装中的凸起引线框架方式将裸片安装在半导体封装中，通过将SOI裸片的有源层连接到金属引线上的焊料或其它金属凸块来改善来自绝缘体上硅（SOI）裸片的热传递将封装安装在印刷电路板或其他支撑结构上。

9. 发明授权

US08354831B2 Reverse current comparator circuit and method for switching regulators 有权
标题翻译：反向电流比较器电路和开关稳压器的方法
公开(公告)号：US08354831B2
公开(公告)日：2013-01-15
申请号：US12036084
申请日：2008-02-22
申请人： Robert Wrathall
发明人： Robert Wrathall
IPC分类号： G05F1/575 , G05F1/656
CPC分类号： H02M3/1588 , Y02B70/1466
摘要： A reverse current comparator for use in switching regulators includes a differential stage configured to encode the difference in voltage between an N and a P input. The differential stage feeds one or more gain stages. At least one of the gain stages includes one or more hysteresis devices. When the voltage of the N input exceeds the voltage of the P input by a predetermined margin, the hysteresis device causes the regulator to enter a triggered state in which it outputs a non-zero output voltage. Subsequent changes to the N and P inputs do not change the regulator output until a RESET input is asserted and which point the regulator enters a reset state and is ready to be triggered.
摘要翻译：用于开关调节器的反向电流比较器包括差分级，其被配置为对N和P输入之间的电压差进行编码。差分级馈送一个或多个增益级。至少一个增益级包括一个或多个滞后装置。当N输入的电压超过P输入的电压达预定余量时，滞后装置使调节器进入触发状态，在该状态下输出非零输出电压。 N和P输入的后续更改不会改变调节器输出，直到RESET输入被置位，并且调节器进入复位状态并准备好被触发。

10. 发明授权

US08035364B2 Step-down switching regulator with freewheeling diode 有权
标题翻译：具有续流二极管的降压型开关稳压器
公开(公告)号：US08035364B2
公开(公告)日：2011-10-11
申请号：US12148570
申请日：2008-04-21
申请人： Richard K. Williams
发明人： Richard K. Williams
IPC分类号： G05F1/00
CPC分类号： H02M3/158 , H02M3/1588 , Y02B70/1466
摘要： A freewheeling DC/DC step-down converter includes a high-side MOSFET, an inductor and an output capacitor connected between the input voltage and ground. A freewheeling clamp, which includes a freewheeling MOSFET and diode, is connected across the inductor. When the high-side MOSFET is turned off, a current circulates through the inductor and freewheeling clamp rather than to ground, improving the efficiency of the converter. The converter has softer diode recovery and less voltage overshoot and noise than conventional Buck converters and features unique benefits during light-load conditions.
摘要翻译：续流DC / DC降压转换器包括连接在输入电压和地之间的高边MOSFET，电感器和输出电容器。包括续流MOSFET和二极管的续流夹具连接在电感器两端。当高侧MOSFET关断时，电流通过电感器和续流钳而不是接地，从而提高转换器的效率。转换器具有比传统降压转换器更软的二极管恢复和更少的电压过冲和噪声，并且在轻负载条件下具有独特的优势。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式