Abstract: A cascaded converter architecture comprising a pure switched-capacitor (SC) stage and a resonant SC stage. Multiple switching buses are utilized to connect the first-stage SC converter with second-stage multi-phase resonant SC converters. The flying capacitors of both stages are resonant with the output inductors, so the charge distribution loss is eliminated. Zero-current switching is realized by adjusting the duty ratio and switching frequency. By using the intermediate switching bus, the number of switches can be reduced, and the intermediate bus capacitor is not required; thereby greatly reducing component count and cost while improving power density. Numerous implementation variations are described by way of example and not limitation.

Abstract: A power supply module comprises an inductor pack, a top PCB (Printed Circuit Board) on top of the inductor pack, a bottom PCB disposed below the inductor pack, a connector connected between the bottom PCB and the top PCB, two power device chips on top of the top PCB, an output capacitor substrate layer disposed below the bottom PCB, and an interposer substrate layer disposed below the output capacitor substrate layer. The inductor pack comprises two inductors, each inductor having a first end and a second end. The two power device chips are respectively connected to the first ends of the two inductors via the top PCB. A first output capacitor and a second output capacitor are embedded within the output capacitor substrate layer, and are respectively connected to the second ends of the two inductors to provide a first output voltage and a second output voltage.

Abstract: A cascaded power converter architecture is provided which merges a front end stage with subsequent interleaved Switched Capacitor (SC) stages to achieve high conversion ratios. This interleaving control technique addresses practical conversion challenges. Numerous topologies can be created from this approach, a number of examples being depicted, including: (a) a two stage 4-to-1 conversion using two 2-to-1 ReSc converter stages, and (b) 8-to-1 converters with (b)(i) a 2-to-1 ReSC stage followed by a 2nd stage having four 4-to-1 STC converter phases, (b)(ii) a 2-to-1 ReSC 1st stage followed by a 2nd stage with four 4-to-1 series-parallel phases, and (c) a multi-stage cascading three stage converter with a 2-to-1 ReSC 1st stage, a 2nd stage of two 2-to-1 ReSC phases, and a 3rd stage having four 2-to-1 ReSC phases.

Abstract: An inductor has one or more wires and a multipart magnetic core. The multipart magnetic core has magnetic core parts that are adjacent and magnetically coupled. The inductor provides an inductance of at least 40 nH for currents greater than 1 A and less than 60 A, and at least 20 nH for currents of at least 60 A.

Abstract: Aspects of series resonator DC-to-DC converters are described. A series resonator DC-to-DC converter can include a first half-bridge circuit comprising a first high-side switch and a first low-side switch, a second half-bridge circuit comprising a second high-side switch and a second low-side switch, and a resonator in series between the first high-side switch and the first low-side switch. The circuit design and switching controller can be relied upon to impart soft-switching.

Abstract: An inductor has one or more wires and a multipart magnetic core. The multipart magnetic core has magnetic core parts that are adjacent and magnetically coupled. The inductor provides an inductance of at least 40 nH for currents greater than 1 A and less than 60 A, and at least 20 nH for currents of at least 60 A.

Abstract: Aspects of series resonator DC-to-DC converters are described. A series resonator DC-to-DC converter can include a first half-bridge circuit comprising a first high-side switch and a first low-side switch, a second half-bridge circuit comprising a second high-side switch and a second low-side switch, and a resonator in series between the first high-side switch and the first low-side switch. The circuit design and switching controller can be relied upon to impart soft-switching.

Abstract: An inductor has one or more wires and a multipart magnetic core. The multipart magnetic core has magnetic core parts that are adjacent and magnetically coupled. The inductor provides an inductance of at least 40 nH for currents greater than 1 A and less than 60 A, and at least 20 nH for currents of at least 60 A.

Abstract: An inductor has one or more wires and a multipart magnetic core. The multipart magnetic core has magnetic core parts that are adjacent and magnetically coupled. The inductor provides an inductance of at least 40 nH for currents greater than 1 A and less than 60 A, and at least 20 nH for currents of at least 60 A.

Abstract: A voltage regulator has a switching circuit and a control circuit. The switching circuit receives an input voltage and provides an output voltage and an output current. The control circuit provides a control signal to the switching circuit, such that the output voltage is maintained at a clamp voltage level when the output current is lower than a transition current level, and the output voltage decreases as the output current increases when the output current is higher than the transition current level.

Abstract: A voltage regulator has a switching circuit and a control circuit. The switching circuit receives an input voltage and provides an output voltage and an output current. The control circuit provides a control signal to the switching circuit, such that the output voltage is maintained at a clamp voltage level when the output current is lower than a transition current level, and the output voltage decreases as the output current increases when the output current is higher than the transition current level.

Abstract: A composite includes a substrate and at least a resin composition formed on the substrate. A surface of the substrate is defined a plurality of micro-pores therein. The resin composition is coupled to the surface having the micro-pores by the resin composition filling and hardening within the micro-pores. The resin composition contains crystalline thermoplastic synthetic resins. A method for making the composite is also described.

Abstract: A power supply circuit includes a comparator, first to third electronic switches, a D-trigger, a power supply unit (PSU), and a complex programmable logic device (CPLD). When a voltage from the PSU is greater than a reference voltage, the first electronic switch is turned on. An electronic device connected to the first electronic does not receive power from the PSU. The second electronic switch is turned on. The third electronic switch is turned off. The D-trigger outputs a low level signal to make the CPLD control the PSU stop supplying power.

Abstract: When there is a memory module mounted in a memory slot, a memory power circuit provides a voltage to the memory slot. First and second power pins of the memory slot are connected. A first electronic switch is turned on. A second electronic switch is turned off. A programmable logic controller (PLC) outputs a first control signal to the memory power circuit to output the voltage to the memory slot. When there is no memory module mounted in the memory slot and the motherboard is powered on, the memory power circuit provides a voltage to the memory slot. The first and second power pins of the memory slot are disconnected. The first electronic switch is turned off. The second electronic switch is turned on. The PLC outputs a second control signal to control the memory power circuit not to output the voltage to the memory slot.

Abstract: A power supply device for a solid state drive (SSD) inserted into a slot of a computer includes a number of voltage input contacts, a diode, a first voltage regulating module and a second voltage regulating module connected in series. The slot includes a number of voltage output contacts and a number of signal transmitting contacts. The voltage input contacts are connected to the voltage output contacts and selectively connected to the signal transmitting contacts. The voltage input contacts obtains an initial voltage from the slot from the voltage output contacts or the signal transmitting contacts. The first voltage regulating module boosts the initial voltage. The second voltage regulating module regulates the boosted voltage to a preset voltage. The diode prevents a voltage outputting from the voltage input contacts to the signal transmitting contacts.

Abstract: A password input device includes a display unit, an input unit and a control unit. The display unit includes a group of LCD displays for display numerals. The input unit includes a group of keys corresponding to the LCD displays. The keys are positioned on the corresponding LCD displays; the control unit creates a group of numerical key sequences, and controls the LCD displays to display the numerical key sequences through the keys.

Abstract: A protection circuit for a memory control chip of a computer includes a controller, a switch circuit, a memory control chip, and a delay circuit. The controller outputs a high level control signal when the computer is in a first state, and outputs a low level control signal when the computer is in a second state. The switch circuit connects or disconnects the connection between a power pin of the memory control chip and a power terminal, according to the control signal. The delay circuit imposes a predetermined time delay for receiving a high level control signal, and outputs an enable signal to an enable pin of the memory control chip to make the memory control chip operate again, after a predetermined delay.

Abstract: A power matching system is applied to a central processing unit (CPU) power supply, which includes a power control chip to regulate the frequency of the signal applied to the CPU power supply. The power control chip includes a detecting pin. The power matching system includes a control unit and a control circuit. The control unit includes a platform controller hub (PCH) to obtain information concerning a CPU, a basic input output system (BIOS) to obtain a power rating of the CPU, and an integrated baseboard management controller (IBMC) to output a required signal to the control circuit according to the power rating established. The power control chip receives the required signal from the control circuit and regulates the frequency of the signal applied to the CPU power supply.

Abstract: A power supply system provides power to a server cabinet, which includes a number of servers. A number of sockets, first and second electrical connecting portions, first and second through holes are arranged on a power connecting board. Each socket includes a first power pin connected to the first electrical connecting portion and a first ground pin connected to the second electrical connecting portion. A number of power interfaces, third and fourth electrical connecting portions, third and fourth through holes are arranged on a base. Each power interface includes a second power pin connected to the third electrical connecting portion and a second ground pin connected to the fourth electrical connecting portion. The base is electrically connected to the power connecting board when the first connecting element engages in the first and third through holes and the second connecting element engages in the second and fourth through holes.

Abstract: A central processing unit (CPU) test system includes a CPU socket, a CPU core controller, and a CPU test device. The CPU core controller stores a start voltage message. The CPU test device includes a voltage detection pin, an analog to digital (A/D) converter, and a microcontroller. The voltage detection pin detects a voltage of an electronic device connected to the CPU socket. The A/D converter converts the detected voltage into a digital signal. The microcontroller controls the CPU core controller to output the start voltage to the CPU socket according to the digital signal. The microcontroller stores a predetermined start voltage message. The microcontroller reads the start voltage message after controlling the CPU core controller to output the start voltage, and determines whether the CPU core controller supplies the start voltage to the CPU socket by comparing the read start voltage message with the predetermined start voltage message.