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1.发明授权Unique power supply architecture with cascaded converters for large input-to-output step-down ratio 有权具有级联转换器的独特电源架构，可实现大的输入/输出降压比公开(公告)号：US06246592B1
公开(公告)日：2001-06-12
申请号：US09598555
申请日：2000-06-21
IPC分类号： H02M3335
CPC分类号： H02M3/33592 , H02M2001/007 , Y02B70/1475
摘要： A power supply having a transformer-coupled power converter cascaded with a buck power converter. The transformer-coupled power converter operates in a free-running mode at a nearly 100% maximum duty cycle to convert an input voltage to an intermediate voltage. The buck power converter produces a regulated output voltage from the intermediate voltage. The power supply further includes a pulse width modulation (PWM) controller employing leading-edge modulation of complementary control signals used to control buck switches in the buck converter. The PWM controller is synchronized to primary-side free-running switches of the transformer-coupled power converter by a synchronization signal that is fed-forward across an isolation boundary via a signal transformer. The power supply also may also employ a soft-switching technique to reduce switching losses.
摘要翻译： 具有与降压功率转换器级联的变压器耦合功率转换器的电源。 变压器耦合功率转换器在自由运行模式下工作在几乎100％的最大占空比，将输入电压转换成中间电压。 降压功率转换器从中间电压产生稳定的输出电压。 电源还包括采用用于控制降压转换器中的降压开关的互补控制信号的前沿调制的脉宽调制（PWM）控制器。 PWM控制器通过同步信号与变压器耦合功率转换器的初级侧自由运行开关同步，该同步信号通过信号变压器跨越隔离边界。 电源还可以采用软切换技术来减少开关损耗。
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公开(公告)号：US07375994B2
公开(公告)日：2008-05-20
申请号：US11247048
申请日：2005-10-11
申请人： William M. Andreycak
发明人： William M. Andreycak
CPC分类号： H02M1/42 , H02M2001/007 , Y02B70/12 , Y02P80/112
摘要： An AC-to-DC power converter that is capable of generating a regulated, isolated DC voltage output from a power factor corrected AC voltage input with improved efficiency. The AC-to-DC power converter is a two-stage power converter including a PFC stage connected in series to a power conversion stage. The PFC stage performs power factor correction using a zero current switching technique, and the power conversion stage includes a zero voltage switched half-bridge converter. The power conversion stage includes a transformer for providing the isolated DC voltage output. The AC-to-DC power converter includes a single feedback control loop for transferring error information from the DC voltage output to the PFC stage, thereby obtaining regulation of the DC voltage output.
摘要翻译： 一种AC到DC电力转换器，其能够以提高的效率从功率因数校正的AC电压输入产生稳定的隔离DC电压输出。 AC到DC功率转换器是包括与功率转换级串联连接的PFC级的两级功率转换器。 PFC级使用零电流开关技术进行功率因数校正，功率转换级包括零电压开关半桥转换器。 功率转换级包括用于提供隔离DC电压输出的变压器。 AC到DC功率转换器包括用于将误差信息从DC电压输出传送到PFC级的单个反馈控制回路，从而获得DC电压输出的调节。
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3.发明授权Current sense element incorporated into integrated circuit package lead frame 有权电流检测元件集成在集成电路封装引线框架中
公开(公告)号：US6150714A
公开(公告)日：2000-11-21
申请号：US157284
申请日：1998-09-18
IPC分类号： H01L23/495 , H01L23/48
CPC分类号： H01L23/495 , H01L2224/05554 , H01L2224/05599 , H01L2224/48247 , H01L2224/49171 , H01L2224/85399 , H01L24/48 , H01L24/49 , H01L2924/00014 , H01L2924/01037 , H01L2924/14 , H01L2924/30107 , H01L2924/3011
摘要： An electronic device includes a conductive member disposed within an insulative package. The conductive member is formed from a lead frame used to form the interconnection pins for the device. The conductive member includes an elongated, folded sense element portion having a known resistance. The sense element portion is disposed between two sets of conductive lead portions extending from the conductive member forming pins used to provide a current to the device for sensing. An integrated circuit disposed within the package includes a differential amplifier having differential inputs connected to bond pads on the integrated circuit. The bond pads are connected to spaced-apart tap points of the sense element via conductive bond wires, so that the combination of the sense element and the differential amplifier forms a trans-impedance amplifier. The gain of the differential amplifier is controlled to be proportional to the magnitude of a reference voltage generated by a bandgap voltage reference circuit. The reference voltage varies with temperature such that the overall gain of the trans-impedance amplifier is constant over temperature. The nominal gain of the differential amplifier is established by an on-chip resistance, which is trimmed using fuse-programmable trim cells that are programmed via operational package pins during a pre-operation trim procedure.
摘要翻译： 电子设备包括设置在绝缘封装内的导电构件。 导电构件由用于形成用于器件的互连引脚的引线框架形成。 导电构件包括具有已知电阻的细长折叠的感测元件部分。 感测元件部分设置在两个导电引线部分之间，这两组导电部分从导电部件形成用的引脚延伸，用于向该器件提供电流以进行感测。 布置在封装内的集成电路包括差分放大器，其差分输入连接到集成电路上的接合焊盘。 接合焊盘通过导电接合线连接到感测元件的间隔开的抽头点，使得感测元件和差分放大器的组合形成跨阻抗放大器。 差分放大器的增益被控制成与由带隙电压参考电路产生的参考电压的幅度成比例。 参考电压随温度变化，使得跨阻放大器的总体增益在温度范围内是恒定的。 差分放大器的额定增益由片内电阻建立，片上电阻使用在预操作调整过程中通过操作封装引脚编程的熔丝可编程微调单元进行修整。
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