Abstract: A power supply unit provides power to a common output node. The power supply unit includes a first power conversion block electrically coupled to convert the electrical power input to a first output power supply share supplied to the common output node. The first power conversion block is configured to decrease output voltage from the first power conversion block based on output current from the first power conversion block reaching a rated current level. A second power conversion block is electrically coupled to convert the electrical power input to a second output power supply share supplied to the common output node. The second power conversion block is configured with a predesignated open circuit voltage setting and is further configured to contribute the second output power supply share to the common output node based on the output voltage at the common output node decreasing to the predesignated electrical voltage setting.

Abstract: A power supply includes a power factor correction (PFC) circuit, a PFC bypass circuit, and a decision circuit. The PFC circuit is configured to receive an input current from a power source and, when enabled, reduce current harmonics in the input current by shaping an input sinusoidal current waveform to match a phase and shape of a sinusoidal input voltage waveform. The PFC bypass circuit is configured to bypass the PFC circuit when the PFC circuit is disabled. The decision circuit includes a detection circuit configured to detect an output load of the power supply and is configured to output a PFC enable command based at least in part on the detected output load being greater than or equal to a threshold value and a determination that an input voltage of the power source is greater than or equal to a threshold value.

Abstract: A power supply includes a power factor correction (PFC) circuit, a PFC bypass circuit, and a decision circuit. The PFC circuit is configured to receive an input current from a power source and, when enabled, reduce current harmonics in the input current by shaping an input sinusoidal current waveform to match a phase and shape of a sinusoidal input voltage waveform. The PFC bypass circuit is configured to bypass the PFC circuit when the PFC circuit is disabled. The decision circuit includes a detection circuit configured to detect an output load of the power supply and is configured to output a PFC enable command based at least in part on the detected output load being greater than or equal to a threshold value and a determination that an input voltage of the power source is greater than or equal to a threshold value.

Abstract: A power supply unit provides power to a common output node. The power supply unit includes a first power conversion block electrically coupled to convert the electrical power input to a first output power supply share supplied to the common output node. The first power conversion block is configured to decrease output voltage from the first power conversion block based at least in part on output current from the first power conversion block reaching a rated current level. A second power conversion block is electrically coupled to convert the electrical power input to a second output power supply share supplied to the common output node. The second power conversion block is configured with a predesignated open circuit voltage setting and is further configured to contribute the second output power supply share to the common output node based at least in part on the output voltage at the common output node decreasing to the predesignated electrical voltage setting.

Abstract: A power supply unit (PSU) configured to provide electrical power to an electronic device. The PSU may include a PSU control circuit configured to, via a power meter, detect that electrical power conveyed to the electronic device is above a timer starting threshold. In a first charging mode with a first predetermined charging duration, the PSU control circuit may control the PSU to convey electrical power to the electronic device with a first power ceiling. Subsequently to the first predetermined charging duration elapsing, in a second charging mode with a second predetermined charging duration, the PSU control circuit may control the PSU to convey electrical power to the electronic device with a second power ceiling that is lower than the first power ceiling. Subsequently to the second predetermined charging duration elapsing, the PSU control circuit may control the PSU to return to the first charging mode.

Abstract: A power supply may include multiple converters connected in parallel. The power supply may detect a signal that indicates how much power a device uses. Based on the signal, a converter controller may determine which of the multiple converters to activate or deactivate to supply enough power to meet the power load of the device and to operate the highest efficiency possible. The amount of power output from the power supply may be the sum of the power output by each of the converters that is activated. The power supply may use the multiple converters to operate at high efficiency throughout a wide range of power load levels. Such a power supply may achieve a haystack (i.e., near flat) power efficiency curve throughout a large part of its operating range.

Abstract: Examples are disclosed that relate to power supply devices and methods for managing DC power. In one example, a method comprises: providing DC power at a first voltage until determining that a standby time period has elapsed; determining that a load is connected to the power supply device; and based on determining that the standby time period has elapsed, entering a restricted power mode, wherein the restricted power mode comprises either: deactivating the DC power, or (1) providing the DC power at a second voltage until determining that a load detection time period has elapsed, (2) deactivating the DC power after determining that the load detection time period has elapsed, and (3) repeating (1) and (2) until determining that the load is no longer connected to the power supply device.

Abstract: Examples are disclosed that relate to power supply devices and methods for managing DC power. In one example, a method comprises: providing DC power at a first voltage until determining that a standby time period has elapsed; determining that a load is connected to the power supply device; and based on determining that the standby time period has elapsed, entering a restricted power mode, wherein the restricted power mode comprises either: deactivating the DC power, or (1) providing the DC power at a second voltage until determining that a load detection time period has elapsed, (2) deactivating the DC power after determining that the load detection time period has elapsed, and (3) repeating (1) and (2) until determining that the load is no longer connected to the power supply device.

Abstract: A power supply unit having improved resistance to overheating caused by electrically conductive environmental contamination of electrical contacts of a connector of the power supply unit is disclosed. In one example, the connector includes one or more electrical contacts configured to receive one or more signals that indicate the connector is connected to an electronic device. The power supply unit includes a protection circuit that is configured to electrically disconnect the power supply unit from the connector based on detecting that a voltage on at least one of the one or more electrical contacts is greater than an expected/reference voltage. The higher than expected voltage may indicate that electrically conductive contamination has created a short between different electrical contacts of the connector. The power supply unit may be disabled based on detection of the electrically conductive contamination in order to prevent overheating and/or degradation of the connector.