Abstract: Provided are methods for preparing a nickel-cobalt-aluminum precursor material and a cathode material with a gradient distribution of aluminum element. The precursor material and the cathode material based on the precursor material prepared by the methods are of sphere or sphere-like shapes in which the distribution of the aluminum element is changed in a gradient manner, and the particle size distribution is uniform. The synthesized material has a high tap density, is not sensitive to ambient carbon dioxide and moisture, and has a good processability, a high specific capacity and a good stability property.

Abstract: A LED lighting system, such as a dimmable LED lamp, that may simulate the performance of an incandescent bulb. LED strings of different colors may be connected to the output of a single LED driver that regulates an overall intensity of light produced by the LED lighting system. The color of the LED lighting system may be controlled by circuitry, such as one or more switches, that allocates current between the LED strings to change the color temperature of light emitted by the LED lighting system as the light intensity changes.

Abstract: An intelligent control faucet includes a faucet that includes a manual operation valve, an intelligent control module, a water egress tube, a cold water ingress tube, a hot water ingress tube, and a magnetic reed detection device. The water egress tube, the cold water ingress tube, and the hot water ingress tube are connected to the manual operation valve. The intelligent control module is connected, in a series manner, to the water egress tube. The magnetic reed detection device is mounted to the water egress tube and is connected through a feeding cable or directly to the intelligent control module. Water flow can be established or cut off through pulling the water egress tube so that the use is made easy.

Abstract: An integrated heat sink array is introduced in SOI power devices having multiple unit cells, which can be used to reduce the temperature rise in obtaining more uniform temperature peaks for all the unit cells across the device area, so that the hot spot which is prone to breakdown can be avoided, thus the safe operating area of the device can be improved. Also the array sacrifice less area of the device, therefore results in low Rdson.

Abstract: An intelligent control faucet includes a faucet that includes a manual operation valve, an intelligent control module, a water egress tube, a cold water ingress tube, a hot water ingress tube, and a magnetic reed detection device. The water egress tube, the cold water ingress tube, and the hot water ingress tube are connected to the manual operation valve. The intelligent control module is connected, in a series manner, to the water egress tube. The magnetic reed detection device is mounted to the water egress tube and is connected through a feeding cable or directly to the intelligent control module. Water flow can be established or cut off through pulling the water egress tube so that the use is made easy.

Abstract: An intelligent control faucet includes a faucet that includes a manual operation valve, an intelligent control module, a water egress tube, a cold water ingress tube, a hot water ingress tube, and a magnetic reed detection device. The water egress tube, the cold water ingress tube, and the hot water ingress tube are connected to the manual operation valve. The intelligent control module is connected, in a series manner, to the water egress tube. The magnetic reed detection device is mounted to the water egress tube and is connected through a feeding cable or directly to the intelligent control module. Water flow can be established or cut off through pulling the water egress tube so that the use is made easy.

Abstract: An integrated heat sink array is introduced in SOI power devices having multiple unit cells, which can be used to reduce the temperature rise in obtaining more uniform temperature peaks for all the unit cells across the device area, so that the hot spot which is prone to breakdown can be avoided, thus the safe operating area of the device can be improved. Also the array sacrifice less area of the device, therefore results in low Rdson.

Abstract: A switching power converter includes a controller configured to transition from a first operating mode to a second operating mode by determining the operating conditions at the transition point between the operation modes. The controller uses the value of the voltage-time product determined at the boundary between the first and second operating modes to predict the voltage to be applied to the primary-side of the transformer. Using the predicted voltage, the controller can adjust the peak-power control threshold on a cycle-by-cycle basis without the transformer reaching saturation.

Abstract: A switching power converter includes a controller configured to transition from a first operating mode to a second operating mode by determining the operating conditions at the transition point between the operation modes. The controller uses a point where a switch included in the power converter would have been turned on if operating under the first operating mode as a reference point to determine when to turn on the switch under the second operating mode. Using the reference point, the switching power converter determines a control period for regulating the switching period of the switch in a second operating mode.

Abstract: A light emitting diode (LED) controller provides constant current regulation for a converter circuit providing current to an LED. The LED controller senses an inductor voltage and determines an inductor reset time from the sensed inductor voltage. Based on the determined inductor reset time, a switch on time and a switch period, the LED controller generates a control signal modifying the state of a switch coupling the converter circuit to an input voltage.

Abstract: An integrated LED controller drives and reads a passive dimmer and controls a power circuit for the LED. The integrated LED controller detects changes in the position of the passive dimmer and causes the power circuit to brighten or dim the LED accordingly. These functions are normally performed by multiple discrete components. However, the integrated LED controller is implemented as a single integrated circuit, thus reducing the size and cost of the LED dimming system. The integrated LED controller can also include a unified timing controller that coordinates the timing of multiple functions within the controller in a manner that reduces the noise sensitivity of the controller.

Abstract: A TRIAC dimmer controller for an LED lamp dynamically adjusts the amount of additional current supplied to the TRIAC dimmer based on the TRIAC dimmer operating mode. A TRIAC dimmer current controller continually senses the TRIAC dimmer current loading and determines a TRIAC dimmer operating mode based on the detected current. The TRIAC dimmer controller compares the detected current with a threshold current value called a TRIAC holding current, and adjusts the amount of bleeder current based on the difference between the detected current and the threshold current value. By continually sensing the TRIAC dimmer current loading, the LED controller regulates the amount of bleeder current supplied to the TRIAC dimmer using a single sink current path to satisfy the TRIAC dimmer current demands of multiple TRIAC dimmer operating modes.

Abstract: An LED controller reduces jitter of an LED lamp. In one embodiment, the LED controller includes a jitter detection circuit adapted to determine an amount of jitter in an input voltage signal. The input voltage signal includes a plurality of cycles and indicates an amount of dimming for the LED lamp. The LED controller further includes a jitter compensation circuit, which generates a control signal to control regulated in the LED lamp such that an output light intensity of the LED lamp substantially corresponds to the amount of dimming for the LED lamp. The control signal controls current delivery to the LED lamp to compensate for the determined amount of jitter in the input voltage signal.

Abstract: An intelligent control faucet includes a faucet that includes a manual operation valve, an intelligent control module, a water egress tube, a cold water ingress tube, a hot water ingress tube, and a magnetic reed detection device. The water egress tube, the cold water ingress tube, and the hot water ingress tube are connected to the manual operation valve. The intelligent control module is connected, in a series manner, to the water egress tube. The magnetic reed detection device is mounted to the water egress tube and is connected through a feeding cable or directly to the intelligent control module. Water flow can be established or cut off through pulling the water egress tube so that the use is made easy.

Abstract: A light-emitting diode (LED) lighting fixture is configured to interface a three-way socket and provide at least two levels of output light intensity. A detection unit determines whether one or both input voltages lines of the three-way socket are active and provides a control signal to an LED controller indicating which input voltage lines are active. The LED controller is configured to provide different output current levels to an LED bank based on whether one or both input voltage lines are active. By adjusting the output current level based on which input lines are active, the LED lighting fixture provides at least two output lighting intensity levels. LED lighting fixtures according to various embodiments can therefore serve as a direct replacement for three-way incandescent bulbs.

Abstract: A power converter that controls a collector current of a bipolar junction transistor (BJT) by controlling the base current to the BJT after having determined the gain of the BJT. A gain detection block determines a gain of the BJT during a first mode. A current calculation block generates a current setting for the base current based on the gain of the BJT determined by the gain detection block during a second mode distinct from the first mode. In some embodiments, the power converter may be included in a LED lamp system.

Abstract: The embodiments herein describe a power converter including a controller that estimates input current of the power converter. The controller estimates the input current without explicitly sensing the input current. The estimated input current can be used in various applications such as regulating power factor and total harmonic distortion as well as estimating current required to maintain proper operation of a dimmer switch in light emitting diode lamp systems.

Abstract: A light-emitting diode (LED) lighting fixture is configured to interface a three-way socket and provide at least two levels of output light intensity. A detection unit determines whether one or both input voltages lines of the three-way socket are active and provides a control signal to an LED controller indicating which input voltage lines are active. The LED controller is configured to provide different output current levels to an LED bank based on whether one or both input voltage lines are active. By adjusting the output current level based on which input lines are active, the LED lighting fixture provides at least two output lighting intensity levels. LED lighting fixtures according to various embodiments can therefore serve as a direct replacement for three-way incandescent bulbs.

Abstract: A low alloy steel ingot contains from 0.15 to 0.30% of C, from 0.03 to 0.2% of Si, from 0.5 to 2.0% of Mn, from 0.1 to 1.3% of Ni, from 1.5 to 3.5% of Cr, from 0.1 to 1.0% of Mo, and more than 0.15 to 0.35% of V, and optionally Ni, with a balance being Fe and unavoidable impurities. Performing quality heat treatment including a quenching step and a tempering step to the low alloy steel ingot to obtain a material, which has a grain size number of from 3 to 7 and is free from pro-eutectoid ferrite in a metallographic structure thereof, and which has a tensile strength of from 760 to 860 MPa and a fracture appearance transition temperature of not higher than 40° C.

Abstract: An integrated heat sink array is introduced in SOI power devices having multiple unit cells, which can be used to reduce the temperature rise in obtaining more uniform temperature peaks for all the unit cells across the device area, so that the hot spot which is prone to breakdown can be avoided, thus the safe operating area of the device can be improved. Also the array sacrifice less area of the device, therefore results in low Rdson.