Abstract: Methods and systems may involve detecting an output voltage of a voltage regulator and sensing an inductor current corresponding to a saturating output inductor of the voltage regulator. A switching frequency signal can be generated based on the inductor current, wherein the voltage regulator may be controlled based on the output voltage and the switching frequency signal. In one example, the switching frequency signal sets a first switching frequency if the inductor current is below a saturation current threshold, and sets a second switching frequency if the inductor current is below the saturation current threshold, wherein the second switching frequency is less than the first switching frequency.

Abstract: Computing and server power supplies are typically sized larger to deliver the maximum power the system may need. However since systems are not often used to capacity a smaller power supply may be used in conjunction with a thermal sensor to monitor a critical component of the power supply defined as the particular component within the power supply whose temperature reaches its maximum allowed limit sooner than any other power supply component when the average (continuous) power may exceed the power supply's max rating. When a critical temperature has been reached, an interrupt signal is generated by the power supply to signal the host to throttle back until the temperature comes back into an acceptable range.

Abstract: A power supply system includes at least a first power supply module and at least one redundant power supply module. The at least one power supply module supplies power to an output terminal. The at least one redundant power supply module operates in a first state and in a second state. In the first state the second power supply module supplies power to the output terminal. In the second state the second power supply module provides standby power and operates in a burst mode (for example, such as a discontinuous conduction mode).

Abstract: According to some embodiments, power information associated with a computing system may be monitored. Based on the monitored power information, it may be determined whether a hardware memory throttling signal will be asserted and/or that a processor power control signal will be asserted.

Abstract: An energy efficient power supply system is disclosed. The energy efficient power supply system comprises a plurality of power supply units and the power supply system may be coupled to the control logic. The control logic may be coupled to the power monitor unit. The power monitor unit may determine a power consumption value, which may represent power requirement of a power consuming system such as a computer system. The control logic may determine the power supply units of the plurality of power supply units that are to be activated to provide power to match the power requirement. The control logic may identify the power supply units that may be activated to operate at a maximum efficiency value while providing power specified by the power consumption value.

Abstract: In one embodiment, an apparatus includes a transformer having a primary winding and a secondary winding and a switching circuit to facilitate a periodic application of an input voltage to the primary winding. The switching circuit includes an active switch and a capacitor commonly coupled to the primary winding. In one embodiment, the apparatus further includes a synchronous rectification circuit coupled to the secondary winding to generate a rectified signal, an output filter coupled to the synchronous rectification circuit to provide an output voltage in response to the rectified signal, and a control circuit coupled to the output filter to receive the output voltage and coupled in a switching control relationship with the active switch and the synchronous rectification circuit.

Abstract: According to one embodiment, a computer system is disclosed. The computer system includes an integrated circuits (IC), a power supply that supplies power to the IC and an over-current protection (OCP) circuit. The OCP circuit prevents the exceeding a predetermined power threshold during a short circuit condition while the IC is enabled to receive a greater power level.

Abstract: A system may include a voltage regulator converter to generate a supply voltage, the voltage regulator converter comprising a high side power transistor to generate a high side alternating current and a low side power transistor to generate a low side alternating current, a current sensing circuit to generate a first alternating current based on the high side alternating current and to generate a second alternating current based on the low side alternating current, a rectifier circuit to generate a substantially direct current based on the first alternating current and on the second alternating current, and a resistive element to receive the substantially direct current, wherein a voltage drop across the resistive element is to be proportional to the supply voltage.

Abstract: According to one embodiment, a computer system is disclosed. The computer system includes an integrated circuits (IC), a power supply that supplies power to the IC and an over-current protection (OCP) circuit. The OCP circuit prevents the exceeding a predetermined power threshold during a short circuit condition while the IC is enabled to receive a greater power level.

Abstract: A power system is disclosed for receiving dual alternating current sources and delivering direct current to drive a load. The power system comprises four power supplies and two transfer switch modules, any of which may be removed and replaced without disabling the power system. Three of the power supplies deliver current to drive the load while the fourth is redundant. A transfer switch control circuit activates relays within the transfer switch modules, in response to a change in the voltage maintained by one or both AC sources. As long as one of the AC sources maintains a voltage within a predetermined voltage range, three of the power supplies deliver current to drive the load.

Abstract: A DC-to-DC converter having an input voltage and an output voltage, which includes a circuit topology such that, in operation, the input and output voltages have the same polarity, and that a magnitude of a ratio of the input voltage to the output voltage of the DC-to-DC converter is capable of being equal to, greater than, or less than one. The circuit topology is also such that a same at least one capacitor and alternative coils of a two-coil inductor are employed in a primary and a secondary circuit loop of the DC-to-DC converter. The primary and secondary circuit loops are not electrically isolated.

Abstract: A power system is disclosed for receiving dual alternating current sources and delivering direct current to drive a load. The power system comprises four power supplies and two transfer switch modules, any of which may be removed and replaced without disabling the power system. Three of the power supplies deliver current to drive the load while the fourth is redundant. A transfer switch control circuit activates relays within the transfer switch modules, in response to a change in the voltage maintained by one or both AC sources. As long as one of the AC sources maintains a voltage within a predetermined voltage range, three of the power supplies deliver current to drive the load.

Abstract: A system includes a first voltage regulator, a second voltage regulator, a third voltage regulator and a circuit. The first voltage regulator is coupled to receive power from a first power line, and the second voltage regulator coupled to receive power from a second power line. The circuit monitors a voltage of at least one of the first and second power lines and based on the monitored voltage, the circuit selectively couples the third voltage regulator to receive power from one of the first and second power lines.

Abstract: A voltage regulator includes a transformer, a plurality of output stages and at least one switch. The transformer has a primary side and a secondary side, and the switch(es) are coupled to the primary side of the transformer to open and close to transfer energy to the transformer. The output stages are coupled to the secondary side of the transformer to receive energy from the transformer and provide output voltages. The output stages prevent current from flowing through the switch(es) during time intervals in which the switch(es) transition from being open to being closed.

Abstract: A system includes a first voltage regulator, a second voltage regulator, a third voltage regulator and a circuit. The first voltage regulator is coupled to receive power from a first power line, and the second voltage regulator coupled to receive power from a second power line. The circuit monitors a voltage of at least one of the first and second power lines and based on the monitored voltage, the circuit selectively couples the third voltage regulator to receive power from one of the first and second power lines.

Abstract: A computer system fan circuit having a primary power voltage source and a standby power voltage source. A fan control circuit is coupled to the primary power voltage source, the standby power voltage source and a power supply fan. In this way, power may be provided to the power supply fan when a power supply is in either a fill power mode or a standby power mode. In another embodiment, a ripple filter circuit is coupled to a voltage source and a system fan. The ripple filter circuit may be, for example, an active suppression current limiter circuit that limits the current drawn by one or more system fans.

Abstract: A DC-to-DC converter includes: a first and a second inductor path, the inductor paths being coupled in the converter so as to provide a single voltage output signal during converter operation. An array of switches are coupled so as to control the application of voltage sources to the inductor paths during converter operation. The switches and the array are coupled so that their states are controlled, at least in part, based upon the voltage signal level of the single voltage output signal during converter operation.A method of producing a voltage signal is as follows. One of two voltage sources is applied to an inductor circuit to produce an output voltage signal. The voltage source supplied is switched based, at least in part, on the voltage signal level of the output voltage signal.

Abstract: A method and apparatus for power factor correction. The present invention provides passive power factor correction for power supplies that supply more than 200 Watts. In one embodiment, power factor correction is provided for over 500 Watt power supplies. A diode bridge circuit provides a rectified voltage output from an alternating current input. A correction circuit receives the rectified voltage and provides power factor correction. The output of the correction circuit is the input to a load circuit, such as an alternating current to direct current circuit.