Dell Products Inc.

Ya-Tang Hsieh

Yung-Chang Chang

Tsung-Cheng Liao

Wei-Cheng Jason Yu

Wei Cheng Yu

Edward Douglas Knapton

Geroncio Ong Tan

Merle Wood, Iii

Chi-Che Wu

Chi Che Wu

Chang Yung Chang

Chi-Hua Lin

Wu Chi Che

Yung Chang Chang

Systems and methods are provided that may be implemented to control operation of a power supply unit (PSU) during a low power state. The disclosed systems and methods may be implemented to control operation of a PSU relay included within the PSU, while the information handling system is operating in a low power state, e.g., such as the modern standby (S0ix) state. The disclosed systems and methods may also be implemented to provide intelligent PSU relay control that may be utilized to control operation of the PSU relay when the information handling system is entering, operating within, and exiting the modern standby (S0ix) state. This intelligent PSU relay control may include at least two operating modes: a modern standby mode and a normal mode of operation, and may be implemented to ensure that the PSU relay remains off during modern standby and returns to normal relay operation upon exiting modern standby.

Systems and methods for controlling operation of a power supply unit (PSU) during a low power state

A method for increasing power supply voltage in an information handling system in a normal mode with a first peak voltage comprises, in response to receiving a request for a higher peak voltage, an embedded controller (EC) receiving information associated with the application including a request for power at a higher peak voltage, a housekeeping IC communicating a signal to a PWM IC to increase voltage supplied to the information handling system to the higher peak voltage, the PWM IC converting from the PSU to the higher peak voltage and starting a timer with a defined time period. If no additional requests for operating at the higher peak voltage are received before the time period expires, the PWM IC communicates a signal that power will stop being supplied at the higher peak voltage, and the information handling system returns to operating in the normal mode at the first peak voltage.

System and method for increasing power supply peak power capacity

Systems and methods are provided to implement power supply units (PSUs) that are capable of operating on input power having different types of input voltage waveforms, including, but not limited to, pure sinusoidal waveforms, non-pure sinusoidal waveforms, and non-sinusoidal waveforms. Such a PSU may operate to continue supplying DC output power to a system load as long as the PSU is powered by any one of a variety of such different input power types, while at the same time also effectively monitoring for presence of input power provided to the PSU and shutting down the PSU in event of absence or termination of the input power to the PSU. Such a PSU may also automatically identify and adapt to changes between different types of input power while at the same time continuing to supply DC output power to a system load in an uninterrupted manner for as long as some type of input power is being provided to the PSU.

System and method for detecting the presence of input power of different types

A system and method of operating an a power supply unit with a light load efficiency control system comprising a power regulator circuit for receiving an alternating current (AC) input voltage from within a range of accommodated AC input voltages and including a power factor correction (PFC) circuit and an LLC resonator circuit having a bulk capacitance voltage level and operable to receive the input AC voltage in the power supply unit and where the power supply unit generates a direct current (DC) output voltage for use by a load. The power supply unit having a processor logic core for the power regulator circuit to control a plural stage bulk capacitor voltage level having at least a high step bulk capacitor voltage level for operation when a normal load is applied to the power supply unit and a low step bulk capacitor voltage level for operation under light load conditions and a light load control circuit for receiving a control input voltage representative of the AC input voltage received by the power supply unit, comparing via a comparator circuit the control input voltage to a reference voltage generated to represent a threshold level of AC input voltage, and activating a light load control feedback signal to the processor logic core if the control input voltage exceeds the reference voltage level under light load operating conditions.

Power supply light load efficiency control circuit

Systems and methods are provided that may be implemented for overvoltage protection of bulk capacitors employed in power factor correction (PFC) circuitry components of switched mode power supply units (PSUs) using one or more inductive overvoltage feedback protection paths (OVPs) to monitor a voltage indicative of a PFC bulk capacitor by sensing the real time voltage at one or both of the primary and/or secondary side windings of a PSU transformer, and/or using an auxiliary windings of a PSU transformer.

Systems and methods for inductive overvoltage protection of PFC bulk capacitors in power supplies

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Taipei, Taiwan

Ya-Tang Hsieh