Abstract: A powered device interface includes a supply sensing circuit, a demand sensing circuit, and a control circuit. The supply sensing circuit is configured to sense an amount of power received by the powered device from at least one power source equipment over an ethernet cable. The demand sensing circuit is configured to sense a power demand requested by the powered device. The control circuit is coupled with the supply sensing circuit and the demand sensing circuit and is configured to cause the power demand requested by the powered device to be reduced when the power demand requested by the powered device exceeds the amount of power allowed by the power source equipment for the powered device.

Abstract: A voltage regulation system can include a voltage regulator, a voltage regulation controller electrically coupled to the voltage regulator, and a multi-use pin configured to be electrically coupled to external circuits (e.g., an external ground, an external compensation circuit, a programmable resistor, an external reference voltage). The voltage regulation system can also include connection devices (e.g., multiple switches, such as transistor switches) configured to be in different connection device configurations, where each one of the connection device configurations enables an associated one of the external circuits via the multi-use pin. The voltage regulation system can also include a smart pin manager configured to determine when the multi-use pin is electrically coupled to one of the external circuits, and to cause the connection devices to be in one of the connection device configurations to enable the associated external circuit based upon the determination.

Abstract: A method for controlling a switched tank converter (STC) includes (a) driving a first resonant tank circuit of the STC at a first frequency and with a first fixed on-time, to obtain a first fixed ratio of output voltage of the STC to input voltage of the STC, while the STC is powering a load having a first magnitude and (b) driving the first resonant tank circuit of the STC at a second frequency and with the first fixed on-time, to obtain the first fixed ratio of output voltage of the STC to input voltage of the STC while the STC is powering a load having a second magnitude. The second frequency is smaller than the first frequency, and the second magnitude is smaller than the first magnitude.

Abstract: A powered device interface includes a supply sensing circuit, a demand sensing circuit, and a control circuit. The supply sensing circuit is configured to sense an amount of power received by the powered device from at least one power source equipment over an ethernet cable. The demand sensing circuit is configured to sense a power demand requested by the powered device. The control circuit is coupled with the supply sensing circuit and the demand sensing circuit and is configured to cause the power demand requested by the powered device to be reduced when the power demand requested by the powered device exceeds the amount of power allowed by the power source equipment for the powered device.

Abstract: A voltage regulation system can include a voltage regulator, a voltage regulation controller electrically coupled to the voltage regulator, and a multi-use pin configured to be electrically coupled to external circuits (e.g., an external ground, an external compensation circuit, a programmable resistor, an external reference voltage). The voltage regulation system can also include connection devices (e.g., multiple switches, such as transistor switches) configured to be in different connection device configurations, where each one of the connection device configurations enables an associated one of the external circuits via the multi-use pin. The voltage regulation system can also include a smart pin manager configured to determine when the multi-use pin is electrically coupled to one of the external circuits, and to cause the connection devices to be in one of the connection device configurations to enable the associated external circuit based upon the determination.

Abstract: A method for controlling a switched tank converter (STC) includes (a) driving a first resonant tank circuit of the STC at a first frequency and with a first fixed on-time, to obtain a first fixed ratio of output voltage of the STC to input voltage of the STC, while the STC is powering a load having a first magnitude and (b) driving the first resonant tank circuit of the STC at a second frequency and with the first fixed on-time, to obtain the first fixed ratio of output voltage of the STC to input voltage of the STC while the STC is powering a load having a second magnitude. The second frequency is smaller than the first frequency, and the second magnitude is smaller than the first magnitude.

Abstract: A programmable, high efficiency resonant converter includes a resonant cell including a first capacitor and a first inductor, the resonant cell having a voltage output VOUT coupled to the first capacitor with a first switch and a first feedback input coupled to the first inductor; and a hard switching cell including a second capacitor and a second inductor, the hard switching cell having a second feedback input coupled to the second capacitor and a voltage output VX coupled to the second capacitor and to the first feedback input of the resonant cell, whereby a negative current is applied to the resonant cell.