Abstract: An apparatus comprises an isolated power converter coupled to an input dc power source, wherein the isolated power converter comprises a first switch network coupled to a first transformer winding and a second switch network coupled to a second transformer winding and a non-isolated power converter coupled to the second switch network of the isolated power converter, wherein a current flowing through the non-isolated power converter is a fraction of a current flowing through the isolated power converter.

Abstract: A method includes generating a first ramp signal for controlling a first portion of a converter, generating a second ramp signal for controlling a second portion of the converter, controlling a state of a first switch of the first portion through comparing the first ramp signal to a control signal and a state of a first switch of the second portion through comparing the second ramp signal to the control signal and determining a switching cycle of the converter through comparing a current flowing through an inductor of the converter to a threshold.

Abstract: The present disclosure relates to the field of fluid switches, and more particularly to an extractable faucet, comprising a faucet housing configured as a tubular member with a cavity; a faucet body including an extractable head and an extractable conduit, an water inlet end of the extractable head is connected to the extractable conduit; a first support received in the cavity and located in a water outlet end of the faucet housing, the extractable head is freely received in the first support and a purified water pipe is embedded detachably into the first support; a mounting seat configured to function as a water distributor and is detachably engaged with the faucet housing; a valve cartridge received in the mounting seat and is used for controlling the shut off of the extractable conduit and the purified water pipe, and separating the flow path of the tap-water and that of the purified water.

Abstract: A method includes detecting a voltage across a bulk capacitor of a power supply system, wherein the power supply system comprises a rectifier, a boost converter and a power converter, and wherein the bulk capacitor is between the boost converter and the power converter, activating the boost converter after the voltage across the bulk capacitor decreases and reaches a first voltage threshold and disabling the boost converter after the voltage across the bulk capacitor increases and reaches a second voltage threshold, wherein the second voltage threshold is greater than the first voltage threshold.

Abstract: A method comprises detecting an input voltage and an output voltage of a buck-boost converter, wherein the buck-boost converter comprises a first high-side switch and a first low-side switch connected in series across an input capacitor, a second high-side switch and a second low-side switch connected in series across an output capacitor and an inductor coupled between a common node of the first high-side switch and the first low-side switch, and a common node of the second high-side switch and the second low-side switch and configuring the buck-boost converter such that at least one of the first high-side switch and second low-side switch operates at a fixed duty cycle mode.

Abstract: A pull-down faucet includes a spout and a water hose movable within the spout. A spray hose connector is attached to the discharge end of the water hose. A sprayhead is in fluid communication with the spray hose connector and the water hose, and is movable between a docked position adjacent the discharge end of the spout, to an undocked position away from the spout. A magnet is secured to the interior of the spray hose connector, and a metallic element is secured near the discharge end of the spout.

Abstract: The present disclosure relates to a switch valve unit, a fluid switch, and a fluid switch assembly. The switch valve unit comprises a valve seat which defines a valve cavity having an open bottom end port; an at least partially axially deformable diaphragm member which is mounted in the valve cavity to divide the valve cavity into an upper cavity portion and a lower cavity portion, and provided with a first hole and a second hole spaced from each other and providing fluid communication between the upper cavity portion and the lower cavity portion; a button axially movably mounted on the valve seat; and a valve rod assembly connected to the button so as to follow the movement of the button, extending through the valve seat and into the upper cavity portion, and having a first position to seal the first hole and a second position to depart from the second first hole.

Abstract: A device comprises a gate drive bridge coupled between a bias voltage of a power converter and ground and a transformer connected to the gate drive bridge, wherein the transformer comprises a primary winding connected to two legs of the gate drive bridge respectively and a plurality of secondary windings configured to generate gate drive signals for low side switches, high side switches and secondary switches of the power converter.

Abstract: In the disclosure a fluid mixing valve for mixing a first fluid and a second fluid is provided, comprising: a housing; a balance valve module for balancing pressure between the first fluid and the second fluid, comprising a first fluid inlet, a second fluid inlet, a first fluid outlet in fluid communication with the first fluid inlet, and a second fluid outlet in fluid communication with the second fluid inlet; an adjustable valve module disposed on the balance valve module, comprising an inner casing member, flow-rate adjustment seat secured to the inner casing member, and a temperature adjustment shaft received in the inner casing member; and a mixed fluid discharging passage.

Abstract: A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

Abstract: A method includes generating a first ramp signal for controlling a first portion of a converter, generating a second ramp signal for controlling a second portion of the converter, controlling a state of a first switch of the first portion through comparing the first ramp signal to a control signal and a state of a first switch of the second portion through comparing the second ramp signal to the control signal and determining a switching cycle of the converter through comparing a current flowing through an inductor of the converter to a threshold.

Abstract: A pull-down faucet includes a spout and a water hose movable within the spout. A spray hose connector is attached to the discharge end of the water hose. A sprayhead is in fluid communication with the spray hose connector and the water hose, and is movable between a docked position adjacent the discharge end of the spout, to an undocked position away from the spout. A magnet is secured to the interior of the spray hose connector, and a metallic element is secured near the discharge end of the spout.

Abstract: A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

Abstract: A pull-down faucet includes a spout and a water hose movable within the spout. A spray hose connector is attached to the discharge end of the water hose. A sprayhead is in fluid communication with the spray hose connector and the water hose, and is movable between a docked position adjacent the discharge end of the spout, to an undocked position away from the spout. A magnet is secured to the interior of the spray hose connector, and a metallic element is secured near the discharge end of the spout.

Abstract: An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the magnetic winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.

Abstract: In an Input-Series-Output-Parallel (ISOP)-type power converter circuit, a DC-to-DC converter has a positive input coupled to a DC power source and a negative input connected to a negative output. A plurality of capacitors are coupled in series between a positive output of the converter and a circuit ground, the negative output of the converter coupled to a common node of first and second capacitors. A half-bridge inverter network is coupled between the positive output and a circuit ground, each inverter having an input respectively coupled to the first capacitor and the second capacitor. A plurality of resonant tanks are coupled to an output of a respective one of first and second half-bridge inverters. A transformer is coupled to outputs of the plurality of resonant tanks. A rectifier circuit is coupled to a secondary winding of the transformer to provide a DC output voltage.

Abstract: A method comprises generating a first ramp signal and a second ramp signal for controlling a buck converter portion and a boost converter portion of a buck-boost converter respectively, comparing the first ramp signal and the second ramp signal to a control signal, controlling the buck converter portion using the comparing the first ramp signal to the control signal and the boost converter portion using the comparing the second ramp signal to the control signal, comparing a current flowing through the inductor to a current threshold and terminating a switching cycle based upon the comparing the current flowing through the inductor to the current threshold.

Abstract: An Input-Series-Output-Parallel (ISOP)-type partial power converter circuit comprises: an isolated, unregulated DC-to-DC converter configured to generate a first output voltage at a first output voltage node; and a regulated DC-to-DC converter coupled with the unregulated DC-to-DC converter and configured to generate a second output voltage at a second output voltage node, the regulated DC-to-DC converter comprising a resonant forward-flyback converter configuration; wherein the first output voltage node is coupled in parallel with the second output voltage node.

Abstract: A converter is provided. The converter includes a first DC/DC converter, a non-isolated DC/DC converter and a control circuit. The first DC/DC converter includes a transformer, a primary side inverter and a secondary side rectifier. The primary side inverter and a secondary side rectifier are operable at multiple operating modes. The control circuit determines an operating mode for the primary side inverter or the secondary side rectifier, and controls the primary side inverter or the secondary side rectifier to change its respective operating mode.

Abstract: The present disclosure relates to a shower device and a shower controlling device. The shower controlling device comprises: a tube structure having a first inlet tube, a second inlet tube and an outlet tube; a mixing valve having mixing chamber which is in fluid communication with the outlet tube and is maintained to be in fluid communication with at least one of the first inlet tube and second inlet tube; a switching valve which is spaced apart from the mixing valve and is suitable for controlling the switching on/off of the outlet tube; a mounting disc provided to be spaced apart from the tube structure; and a transferring and adjusting mechanism which is mounted between the switching valve and the mounting disc in such a manner that the length of the mechanism is adjustable, and is able to operate the switching valve under an external force.