摘要:
One exemplary embodiment is a server that includes multiple power supplies. When the server is in a standby state, one power supply is in a standby state and another power supply is in a deep sleep state.
摘要:
An electric power conversion system has an adaptable transformer turns ratio for improved efficiency. The transformer has multiple taps on its primary. Switching circuitry is configured to connect an energy source to the taps in at least two modes such that the transformer operates with a first primary-to-secondary turns ratio in the first mode and with a second primary-to-secondary turns ratio in the second mode. The first turns ratio is greater than the second turns ratio. Control circuitry is configured to operate the switching circuitry in the first mode when a voltage level of the energy source is above a first threshold and to operate the switching circuitry in the second mode when the voltage level is below a second threshold.
摘要:
An electric power conversion system has an adaptable transformer turns ratio for improved efficiency. The transformer has multiple taps on its primary. Switching circuitry is configured to connect an energy source to the taps in at least two modes such that the transformer operates with a first primary-to-secondary turns ratio in the first mode and with a second primary-to-secondary turns ratio in the second mode. The first turns ratio is greater than the second turns ratio. Control circuitry is configured to operate the switching circuitry in the first mode when a voltage level of the energy source is above a first threshold and to operate the switching circuitry in the second mode when the voltage level is below a second threshold.
摘要:
One exemplary embodiment is a server that includes multiple power supplies. When the server is in a standby state, one power supply is in a standby state and another power supply is in a deep sleep state.
摘要:
A gate driver (100), a high-side MOSFET switch system (200) and a method (300) of pulse-driven switching a MOSFET employ a Miller capacitance or a Miller capacitance threshold. The gate driver (100) includes a gate discharge portion (110) to provide a first voltage for a first time period to a gate of a MOSFET (102). The first voltage is less than a turn-on threshold voltage of the MOSFET. The gate driver further includes a gate charge portion (120) to provide a second voltage for a second time period to the MOSFET gate. The second voltage is greater than the MOSFET turn-on threshold voltage. The second time period is less than a time period for a gate-source voltage of the MOSFET to exceed the Miller capacitance threshold. The method (300) of pulse-driven switching of a MOSFET includes applying (310) the first voltage for the first time period and applying (320) the second voltage for the second time period.
摘要:
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.
摘要:
A method for fabricating a point-of-load (POL) power supply system can include providing a circuit board. The circuit board can include a first set of connections configured for coupling a predetermined first portion of components of a voltage regulator down (VRD) system to the circuit board and a second set of connections configured for coupling a replacement module to the circuit board. Each of the first set of connections and the second set of connections is electrically coupled with a third set of connections that is configured for coupling a second portion of components of the VRD system to the circuit board. The second portion of components of the VRD system is connected to the circuit board. The replacement module is connected onto the circuit board via the second set of connections such that the replacement module and the second portion of components of the VRD system cooperate to provide at least a portion of the POL system.
摘要:
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.
摘要:
Plural electric power supplies are connected in parallel to an output bus. The plural supplies include a primary power supply and a redundant switching power supply. The primary power supply is configured to provide output current to a load when the primary power supply is operating normally. The redundant supply is configured to remain online while not providing output current to the load when the primary power supply is operating normally, but to begin providing output current to the load when the primary power supply is not operating normally.
摘要:
A method for fabricating a point-of-load (POL) power supply system can include providing a circuit board. The circuit board can include a first set of connections configured for coupling a predetermined first portion of components of a voltage regulator down (VRD) system to the circuit board and a second set of connections configured for coupling a replacement module to the circuit board. Each of the first set of connections and the second set of connections is electrically coupled with a third set of connections that is configured for coupling a second portion of components of the VRD system to the circuit board. The second portion of components of the VRD system is connected to the circuit board. The replacement module is connected onto the circuit board via the second set of connections such that the replacement module and the second portion of components of the VRD system cooperate to provide at least a portion of the POL system.