Abstract: A server room power management apparatus and method, the power management apparatus comprising a first PDE (power distribution equipment), at least one second PDE and at least one DM (digital meter); wherein a first network interface unit of the first PDE, a second network interface unit of the second PDE and the DM can be connected to become a network; the power management method uses a first processor of the first PDE to collect power consumptions of the second PDE and the DM; wherein, the first processor can work out power usage effectiveness; thus, the apparatus and method do not need an independent server device, that will reach power saving and reduce apparatus costs.

Abstract: A power supply covering both power sharing and power backup functions run in a more efficient and flexible way. The power supply adopts a power sharing converter coupled between a first bus terminal and a second bus terminal, so that if one of the bus terminals provides insufficient power, the other bus terminal kicks in by way of the power sharing converter to provide power support. In addition, a storage capacitor may also kick in to provide power support if one of the bus terminals provide insufficient power via or not via the power sharing converter.

Abstract: An un-interruptible power supply (UPS) with indication of battery internal resistance includes a processor, a display, an internal resistance sensor assembly and a battery pack. The internal resistance sensor assembly is connected to the processor and the battery pack. The processor is connected to the display, generates a reference internal resistance according to multiple internal resistances detected by the internal resistance sensor assembly within a stable time after installation, generates a stable internal resistance according to an internal resistance of the battery pack detected by the internal resistance sensor assembly after the stable time, compares the stable internal resistance with the reference internal resistance to generate a status of internal resistance of the battery pack, and instructs the display to display the status for user's timely awareness of the condition of the battery pack and prompt action when the performance of the battery pack deteriorates.

Abstract: A charging device and a handheld electronic device both with adaptive current limiting protection are provided. Both of the charging device and the handheld electronic device have a connection interface and an adaptive current limiting protection circuit comprising an impedance unit, a switch, and a control unit. The control unit is electrically coupled to the switch, the impedance unit, and an electrical path connected to a power pin of the connection interface. The control unit stores a plurality of voltage values and a plurality of different corresponding current limit values. The control unit is configured to measure the voltage of the electrical path to obtain a measured voltage, and the control unit is further configured to measure the voltage across the impedance unit to calculate a current value. When the current value reaches the current limit value corresponding to the measured voltage, the control unit turns off the switch.

Abstract: An IP address display device suitable for a power device is provided. The IP address display device comprises a communication interface, a display interface, and a control circuit. The control circuit is electrically coupled to the communication interface and the display interface, and is used to determine whether an IP address allocated by a DHCP server has been obtained through the communication interface. When the determination result is yes, the control circuit automatically displays the obtained IP address by the display interface for a preset time. In addition, a power distribution unit and an uninterruptible power system using the same are also provided.

Abstract: A voltage regulator has a switching circuit and a control circuit. The switching circuit provides an output voltage and an output current. The control circuit provides a switching control signal to the switching circuit to adjust the output voltage, such that the output voltage decreases with a first slope as the output current increases when the output current is less than a first current level, the output voltage decreases with a second slope as the output current increases when the output current is larger than the first current level and is less than a second current level, and the output voltage decreases with a third slope as the output current increases when the output current is larger than the second current level.

Abstract: An uninterruptable power supply system including a battery, a converting module, a charging circuit, a first switch, a power detecting circuit and a controlling module is provided. The converting module is coupled between a power inputting terminal and the battery, and connects to a load. The power inputting terminal is connected to a power. The battery is charged through the converting module or discharges to the load through the converting module. The charging circuit is coupled between the power inputting terminal and the battery for charging to the battery. The first switch is coupled between the charging circuit and the battery. The power detecting circuit is coupled to the battery for detecting a power value of the battery. The controlling module is coupled to the power detecting circuit, and control the ON/OFF state of the first switch for making the battery be charged or discharge according the power value or power supply state of the power.

Abstract: A method of fabricating an electronic device includes providing a III-V substrate having a hexagonal crystal structure and a normal to a growth surface characterized by a misorientation from the <0001> direction of between 0.15° and 0.65°. The method also includes growing a first III-V epitaxial layer coupled to the III-V substrate and growing a second III-V epitaxial layer coupled to the first III-V epitaxial layer. The method further includes forming a first contact in electrical contact with the III-V substrate and forming a second contact in electrical contact with the second III-V epitaxial layer.

Abstract: A smart communication interface for a LED driving system driving a LED matrix having a plurality of LEDs. The smart communication interface may have a data write transaction structure in write mode. The data write transaction structure includes an address code for identifying a corresponding one LED among the plurality of LEDs; an R/W indicating code for indicating whether the smart communication interface is in write mode; and a grayscale command code for indicating a programmed grayscale command value for the corresponding one LED identified by the address code. The smart communication interface may include a data read transaction structure in read mode. The data read transaction structure includes the address code, the R/W indicating code and a grayscale read-back code for indicating a grayscale command value for the corresponding one LED identified by the address code.

Abstract: A volume control device suitable for an uninterruptible power system comprising a fan is provided. The volume control device comprises a user interface and a control circuit. The control circuit is electrically coupled to the fan and the user interface, and is used to receive a maximum operation volume setting value through the user interface. When the control circuit is ready to increase the rotation speed of the fan, it further determines whether the corresponding volume of the current rotation speed of the fan is less than the maximum operation volume setting value, and accordingly determines whether to adjust the rotation speed of the fan.

Abstract: An integrated circuit (IC) chip includes a copper structure with an intermetallic coating on the surface. The IC chip includes a substrate with an integrated circuit. A metal pad electrically connects to the integrated circuit. The copper structure electrically connects to the metal pad. A solder bump is disposed on the copper structure. The surface of the copper structure has a coating of intermetallic. The copper structure can be a redistribution layer and a copper pillar that is disposed on the redistribution layer.

Abstract: Soil displacement piles having a shaft and one or more soil displacement assemblies secured to the shaft are provided. If more than one soil displacement assembly is utilized, each soil displacement assembly is separated by a longitudinal distance. Each soil displacement assembly has an upper helical plate, a lower helical plate separated from the upper helical plate by a longitudinal plate distance, and at least one soil displacement plate positioned relative to the shaft, the upper helical plate and the lower helical plate.

Abstract: A system comprises a plurality of power converters, a plurality of energy storage systems, a first common node, a second common node, and zero-reference voltage node. Each power converter is coupled between one energy storage system and the first and second common nodes. The system operates to regulate power between the power converters and the first and second common nodes. Each power converter is a bi-directional power converter and each energy storage system is a battery pack. In one example, the first common node is regulated to a voltage VSPAN, and the second common node is regulated to a voltage VSCN which is the mean of all voltages output by the battery packs. In another example, the first common node is regulated to a voltage ?VSPAN, and the second common node is regulated to a voltage +VSPAN. No power converter processes more than voltage VSPAN yielding high-efficiency power conversion.

Abstract: A current sensing system uses a Hall effect device. A conductor carrying a target current is shaped in a way such that two regions with opposite magnetic field directions crossed there through are created at a silicon die which contains the Hall effect devices placed in a mirror way. The Hall effect devices react the magnetic field to generate a Hall voltage when a bias current is applied, which is then processed by a process circuit and an operational unit, so that a differential signal indicative of the target current is generated.

Abstract: A volume control device suitable for an uninterruptible power system comprising a fan is provided. The volume control device comprises a user interface and a control circuit. The control circuit is electrically coupled to the fan and the user interface, and is used to receive a maximum operation volume setting value through the user interface. When the control circuit is ready to increase the rotation speed of the fan, it further determines whether the corresponding volume of the current rotation speed of the fan is less than the maximum operation volume setting value, and accordingly determines whether to adjust the rotation speed of the fan.

Abstract: A power apparatus having expandable outlet and outlet expanding method thereof, the power apparatus comprises a plurality of outlets, a first processor and a first network interface; the first processor is electrically connected a switch, the first processor can determine whether the switch be in an expandable outlet mode or not, the first network interface electrically connected to the first processor; wherein the first processor can be provided with a first user interface, the first user interface can be provided with outlet information of each outlet, when the switch be in the expandable outlet mode, the first user interface can increase expanded outlet information of amount X under at least one of the outlet information, therefore at least one outlet can be provided with expandability.

Abstract: Multi-level data center using consolidated power control is disclosed. One or more controllers communicate with one or more power supplies and sensors to adapt to dynamic load requirements and to distribute DC-power efficiently across multiple IT racks. The distributed DC-power includes one or more DC-voltages. Batteries can be temporarily switched into a power supply circuit to supplement the power supply during spikes in power load demand while a controller reconfigures power supplies to meet the new demand. One or more DC-to-AC converters handle legacy power loads. The DC-to-AC converters are modular and are paralleled for redundancy. The DC-to-AC converters are sourced from the one or more AC-to-DC converters. The AC power is synchronized for correct power flow control. The one or more controllers communicate with the one or more AC-power supplies to dynamically allocate AC-power from the DC-to-AC converters to the multiple legacy IT racks.

Abstract: A circuit assembly for a power converter includes power stage blocks and heat-dissipating substrate. A power stage block includes a power stage IC die, an output inductor that is connected to a switch node of the power stage IC die, and capacitors that form an output capacitor of the power stage block. The output capacitors of the power stage blocks are symmetrically arranged. The output inductors can be placed on the same side of the substrate as the power stage IC dies, or on a side of the substrate that is opposite to the side where the power stage IC dies are disposed. A power stage block may generate two output phases of the power converter.