Abstract: In some examples, a controller may include a processing resource and a memory resource storing machine readable instructions executable to cause the processing resource to set an electrical power threshold, monitor an amount of electrical power distributed between a plurality of phases of a multi-phase converter operation. The controller may detect a load disparity between a particular phase of the plurality of phases, disable the particular phase, and redistribute the electrical power amongst the remaining phases of the multi-phase converter operation.

Abstract: Example implementations relate to plug-in backup energy devices. In some examples, a plug-in backup energy device may comprise a charger, an energy storage device coupled to the charger, and a buck-boost converter coupled to the charger and the energy storage device such that the buck-boost converter maintains a charge of the energy storage device during a no-fault mode of a computing device, and in response to the plug-in backup energy device switching from a normal mode to a power supply mode as a result of the computing device experiencing a fault, regulates a voltage output of the energy storage device to provide energy to the computing device during the fault of the computing device.

Abstract: Examples herein relate to a multiphase voltage regulator, comprising a pulse-width modulation PWM controller to output a plurality of PWM signals for driving a plurality of pluggable stand-alone voltage regulator converter stage, wherein each pluggable stand-alone voltage regulator converter stage receives one of the PWM signals and delivers a regulated output voltage signal, wherein a contribution of the regulated output voltage signals is delivered to a load connected onto a printed circuit assembly PCA.

Abstract: An example system includes a control interface and a device coupled to the control interface. The control interface may generate a parameter. The device may receive the parameter from the control interface, generate a switching waveform and current reference, adjust the switching waveform to generate an output current, and adjust the output current by using an error amplifier to provide an output current that conforms to at least one parameter.

Abstract: Example implementations relate to performance tests of capacitors. In some examples, a controller may comprise a processing resource to measure a change in voltage of a capacitor of a circuit in response to the controller entering a test mode, determine, based on the measured change in the voltage and an impedance of the circuit, a capacitance of the capacitor, compare the determined capacitance of the capacitor to a predetermined capacitance value, and determine, based on the comparison, a performance of the capacitor.

Abstract: Examples disclose a power system comprising a first power supply to provide a first power to a load. Further, the power system comprises a second power supply to detect a droop in the first power to the load, the droop associated with a decrease in efficiency of the first power supply. Additionally, the second power supply is to balance the load based on the droop detection by providing a second power in addition to the first power to the load to increase the efficiency of the power system.

Abstract: A computing device including a motherboard. The motherboard is coupled to a memory socket, a power rail, and a regulator controller. The memory socket is able to couple to a circuit board that includes memory circuitry. The power rail provides a high-voltage power signal to power circuitry on the circuit board. The power rail provides the high-voltage power signal through the memory socket. The regulator controller provides a control signal to power circuitry on the circuit board. The control signal includes a pulse width modulation signal. An output voltage of the power circuitry on the circuit board may be controlled by the control signal.

Abstract: According to some examples, systems and methods are provided for voltage sampling using one or more analog-to-digital converters (ADCs) to sense divided portions of a sampled voltage (e.g., of an output signal), using the one or more analog-to-digital converters to provide a plurality of digital values representative of those divided portions, and combining the plurality of digital values to produce a total digital value representative of the sampled voltage. Such systems and methods can achieve a high resolution for the total digital value while permitting use of ADCs that have a resolution lower than would otherwise be required to achieve the high resolution.

Abstract: Examples herein relate to a power supply system for a server. The system comprises a primary source, a power interface and a direct current (DC) energy supply chargeable by the primary source through the power interface. The primary source to power the server through the power interface and in the event of failure of the primary source, the DC energy supply powers the server through the power interface. The DC energy supply is located inside the server on a cool side of the server.

Abstract: A computing device including a motherboard. The motherboard is coupled to a memory socket, a power rail, and a regulator controller. The memory socket is able to couple to a circuit board that includes memory circuitry. The power rail provides a high-voltage power signal to power circuitry on the circuit board. The power rail provides the high-voltage power signal through the memory socket. The regulator controller provides a control signal to power circuitry on the circuit board. The control signal includes a pulse width modulation signal. An output voltage of the power circuitry on the circuit board may be controlled by the control signal.

Abstract: Example implementations relate to a variable soft start device. For example, in an implementation, the variable soft start device may set the capacitance of a variable capacitance circuit connected to a soft start pin of the electronic fuse. The variable soft start device may read a power-good signal from the electronic fuse and determine the capacitance to set according to the power-good signal.

Abstract: Examples include detection of high temperature events. In some examples, a high temperature event may be detected in an electronic component by running the electronic component on a printed circuit board. A continuity sensor may detect whether a trace positioned under the electronic component has broken. A broken trace may indicate a high temperature event in the electronic component. Based on the detection of the broken trace, the electronic component is disconnected.

Abstract: Examples disclosed herein relate to multi-node system fault management. In some of the examples disclosed herein, a fault detection circuit may distinguish between normal operating conditions of a multi-node system and faults that occur between the overcurrent protection of the system's power supplies and the hot plug protection of the system's nodes. The fault detection circuit may detect these faults by monitoring a voltage at the node's backplane connector prior to the input of the node's hot plug protection interface. If the magnitude of the monitored voltage drops below a threshold voltage at a rate that exceeds a threshold rate, the fault detection circuit may determine that a fault has occurred and may communicate the fault to the power supplies. The power supplies may receive the fault communication and shut off their power outputs to prevent the fault from causing damage to the components in the system.

Abstract: An example device in accordance with an aspect of the present disclosure includes a first converter to selectively convert a first input signal to a first output signal, and a second converter to selectively convert a second input signal to a second output signal. A controller is to control switches of the first and second converters based on the input signals and output signals, and based on operating the first and second converters exclusively with respect to each other such that a total of first and second duty cycles does not exceed one.

Abstract: An example device in accordance with an aspect of the present disclosure includes a first converter to selectively convert a first input signal to a first output signal, and a second converter to selectively convert a second input signal to a second output signal. A controller is to control switches of the first and second converters based on the input signals and output signals, and based on operating the first and second converters exclusively with respect to each other such that a total of first and second duty cycles does not exceed one.

Abstract: A sharing criteria metric is received for each of three phases of a three-phase power. Loads on power converters receiving the three phase power are adjusted based on the sharing criteria metric of each of the three phases.

Abstract: An example system includes a failure detection circuit. The failure detection circuit is to detect a failure of a first power source electrically coupled to a first load. The failure detection circuit is to output a first signal indicating the detection of the failure of the first power source. The system also includes a current regulating circuit. The current regulating circuit is electrically coupled to the failure detection circuit. The current regulating circuit is to electrically couple a second power source to the first load based on the first signal output by the failure detection circuit. The current regulating circuit is to restrict a first current from the second power source.

Abstract: According to some examples, systems and methods are provided for voltage sampling using one or more analog-to-digital converters (ADCs) to sense divided portions of a sampled voltage (e.g., of an output signal), using the one or more analog-to-digital converters to provide a plurality of digital values representative of those divided portions, and combining the plurality of digital values to produce a total digital value representative of the sampled voltage. Such systems and methods can achieve a high resolution for the total digital value while permitting use of ADCs that have a resolution lower than would otherwise be required to achieve the high resolution.

Abstract: One embodiment provides a system for controlling one or more pulse width modulated (PWM) fans. The system can include a control system configured to provide a voltage control signal corresponding to a DC output voltage for the one or more PWM fans. A variable DC voltage source is configured to supply the DC output voltage to the plurality of fans at one of at least two different DC voltages based on the voltage control signal. The DC output voltage from the variable DC voltage source is separate from a PWM control signal that is also supplied to the PWM fans.

Abstract: An apparatus and method alternately transmit power from a first active power factor corrector (22, 122, 222), receiving power from a first alternating current (AC) source (27), and a second active power factor corrector (24, 124, 224), receiving power from a second AC source (28) having at least one line or neutral in common with the first AC power source (27) and in parallel with the first active power factor corrector (22, 122, 222), to a load (30). Current circulation from the first active power factor corrector (22, 122, 222) to the second active power factor corrector (24, 124, 224) and from the second active power factor corrector (24, 124, 224) to the first active power factor corrector (22, 122, 222) is inhibited.