Abstract: A Totem Pole PFC circuit includes at least one fast-switching leg, a slow-switching leg, and a control unit. Each fast-switching leg includes a fast-switching upper switch and a fast-switching lower switch. The slow-switching leg is coupled in parallel to the at least one fast-switching leg, and the slow-switching leg includes a slow-switching upper switch and a slow-switching lower switch. The control unit receives an AC voltage with a phase angle, and the control unit includes a current detection loop, a voltage detection loop, and a control loop. The control loop generates a second control signal assembly to respectively control the slow-switching upper switch and the slow-switching lower switch. The control loop controls the second control signal assembly to follow the phase angle, and dynamically adjusts a duty cycle of the second control signal assembly to turn on or turn off the slow-switching upper switch and the slow-switching lower switch.

Abstract: An optical sensor device for determining a hydration level information of an object includes a light-emitting element, a light-receiving element, and an analyzer. The light-emitting element is configured to emit a first light at a first wavelength and a second light at a second wavelength. The light-receiving element is configured to receive a first reflected light at the first wavelength and a second reflected light at the second wavelength from the object. The analyzer is configured to perform a hydration measurement to determine the hydration level information. The hydration level information is based on: a first reference signal strength at the first wavelength and a second reference signal strength at the second wavelength obtained from the light-receiving element when the object is not present; and a first signal strength of the first reflected light and a second signal strength of the second reflected light when the object is present.

Abstract: A heating device includes a resonant circuit, a detection unit and a control unit. The resonant circuit includes an inverter circuit and a resonant tank. The inverter circuit provides a resonant tank current and a resonant tank voltage. The resonant tank includes a heating coil, a resonant tank capacitor, a resonant tank equivalent inductor and a resonant tank equivalent resistor. The detection unit calculates an inductance of the resonant tank equivalent inductor according to a capacitance of the resonant tank capacitor, a resonant period and a first expression. The detection unit calculates a resistance of the resonant tank equivalent resistor according to the inductance of the resonant tank equivalent inductor, a time change value, a reference voltage value, a negative peak voltage value and a second expression.

Abstract: A forward converter includes a voltage conversion device, a switch and an auxiliary device. The voltage conversion device includes a primary winding and a secondary winding, and is configured to convert an input voltage into an output voltage. The switch is connected to the voltage conversion device, and is switched to make the voltage conversion device receive or not receive the input voltage. The auxiliary device is connected to the voltage conversion device. When the switch is cut off, the auxiliary device stores electrical energy released by the voltage conversion device and generates a compensation voltage, and when the switch is turned on, the auxiliary device provides the compensation voltage, wherein the compensation voltage and the input voltage have same polarity. The present disclosure further provides a forward power factor corrector including the forward converter described above and a rectifying device.

Abstract: A portable information handling system includes a touch function row between a keyboard and a display that accepts touches or proximity detection at plural locations to initiate an on-screen-display user interface for a selected of plural functions based upon a touch location. Haptic feedback to touch function row inputs is provided by a haptic device coupled directly to a bottom surface of the touch function row, such as with an adhesive. The haptic device couples to a housing cover portion with a brace that integrates a resilient member, such as a spring, to dampen vibration from a haptic vibration source to the housing cover portion.

Abstract: A light-emitting unit, having a substrate; a first light-emitting body formed on the substrate, and having a first longer side and a first shorter side; a second light-emitting body formed on the substrate, and having a second longer side and a second shorter side which is parallel to the first longer side; a third light-emitting body formed on the substrate, having a third longer side and a third shorter side which is parallel to the first longer side, and electrically connected to the first light-emitting body and the second light-emitting body; a first electrode covering the first light-emitting body and the second light-emitting body, and electrically connecting to the first light-emitting body; a second electrode separated from the first electrode, and covering the second light-emitting body without covering the first light-emitting body; and a transparent element enclosing the first light-emitting body, the second light-emitting body, and the third light-emitting body.

Abstract: An immersion cooling device includes a housing defining a receiving chamber, a working liquid received in the receiving chamber, a condenser received in the receiving chamber and located outside the working liquid, and a blocking member received in the receiving chamber. The blocking member includes a plurality of blocking bodies dispersed on a top surface of the working liquid.

Abstract: An immersion cooling device includes a housing defining a chamber, a working liquid received in the chamber, a condenser received in the chamber and located outside the working liquid, and at least one support plate received in the chamber. Each of the at least one support plate includes a first portion and a second portion connected to the first portion. The first portion is immersed in the working liquid and configured to hold an electronic device. The second portion protrudes from the working liquid. The second portion defines a slot extending through the second portion, and an opening of the slot faces the condenser.

Abstract: An electronic apparatus includes at least one heat generating component and an immersion cooling system. The immersion cooling system includes a main tank and a liquid amount adjusting module. The main tank is adapted to contain a heat dissipation medium, and the heat generating component is disposed in the main tank to be immersed in the heat dissipation medium. The liquid adjusting module includes an auxiliary tank and a pump. The auxiliary tank is adjacent to the main tank, and the heat dissipation medium in the main tank is adapted to be overflowed into the auxiliary tank. The pump is disposed in the auxiliary tank and adapted to drive the heat dissipation medium in the auxiliary tank to flow into the main tank.

Abstract: An immersion cooling device includes a box body containing coolant, a heat-generating component received in the box body and immersed in the coolant, a slide rail received in the box body, fixed to the box body and located above the coolant, a condenser slidably disposed on the slid rail, a cover body adapted to cover the box body and to be opened relative to the box body, and an inlet pipe connected to the condenser and passing through and sealed from the cover body.

Abstract: A pressure protection device includes a housing, a sliding block, and an adjusting block. The housing includes a receiving chamber communicating with a seal chamber and the housing defines a first gas hole and a second gas hole each communicating the receiving chamber to an ambient environment. The sliding block divides the receiving chamber into a first space and a second space and defines a through hole communicating the first space with the second space. The adjusting block is located in the first space and configured to be attracted to the sliding block so that the through hole is selectively blocked by the adjusting block. When the sliding block slides in the receiving chamber, the first gas hole is selectively blocked by the sliding block to isolate from or to communicate with the first space, and the second gas hole always communicates with the second space.

Abstract: An electronic apparatus includes at least one heat generating component and an immersion cooling system. The immersion cooling system includes a main tank and a liquid amount adjusting module. The main tank is adapted to contain a heat dissipation medium, and the heat generating component is disposed in the main tank to be immersed in the heat dissipation medium. The liquid adjusting module includes an auxiliary tank and a pump. The auxiliary tank is adjacent to the main tank, and the heat dissipation medium in the main tank is adapted to be overflowed into the auxiliary tank. The pump is disposed in the auxiliary tank and adapted to drive the heat dissipation medium in the auxiliary tank to flow into the main tank.

Abstract: An immersed cooling system for cooling electronic devices includes a cooling tank accommodating coolant and multiple electronic devices and a liquid cooling circuit for circulating coolant, the electronic device includes key components and common components, the liquid cooling circuit includes cooling branches connected to the key components for cooling, the coolant in the cooling branches flows faster than the coolant in the cooling tank, which improves the heat dissipation effect of the key components and the utilization rate of the coolant by cooling the key components and the common components with different flow rates of coolant, reduces the energy consumption of the immersed cooling system and provides a more efficient thermal solution. An immersed cooling cabinet is also provided.

Abstract: An induction cooker includes a rectifying device, a first energy-storage device, a switch device, a second energy-storage device, a heating device and a control device. The capacitance of the second energy-storage device is greater than the capacitance of the first energy-storage device. When the induction cooker is just starting, the control device controls the switch device to be turned off, such that the heating device generates an output current according to an energy of the first energy-storage device. The control device determines whether a pot is on the heating device according to a change state of the output current. When the pot is on the heating device, the control device controls the switch device to be turned on, such that the first and second energy-storage devices are coupled, and the heating device heats the pot according to energies of the first and second energy-storage devices.

Abstract: Provided is a clock switching device including a first latch circuit, a second latch circuit, and a switching circuit. The first latch circuit latches a first selection signal based on triggering of a first clock signal. The second latch circuit latches a second selection signal based on triggering of a second clock signal. A reset terminal of the second latch circuit is coupled to the first latch circuit. The second latch circuit is selectively reset based on an output of the first latch circuit. The switching circuit is coupled to an output terminal of the first latch circuit and an output terminal of the second latch circuit. The switching circuit selects one of the clock signals as an output clock signal of the clock switching device based on the selection signals.

Abstract: An electronic apparatus includes at least one heat generating component and an immersion cooling system. The immersion cooling system includes a main tank and a liquid amount adjusting module. The main tank is adapted to contain a heat dissipation medium, and the heat generating component is disposed in the main tank to be immersed in the heat dissipation medium. The liquid adjusting module includes an auxiliary tank and a pump. The auxiliary tank is adjacent to the main tank, and the heat dissipation medium in the main tank is adapted to be overflowed into the auxiliary tank. The pump is disposed in the auxiliary tank and adapted to drive the heat dissipation medium in the auxiliary tank to flow into the main tank.

Abstract: A portable information handling system is assembled and disassembled by a keystone assembly that couples at an upper surface of the portable housing to overlap a keyboard assembly that covers processing components disposed in the portable housing. The keyboard assembly includes a membrane having a first portion with key press detection sensors contiguous to a second portion with a touch detection sensor that supports a touchpad. In one embodiment, the membrane integrates a printed circuit board that couples a key matrix controller and a touch detection controller interfaced with a communications hub, such as a USB hub, to communicate key and touchpad inputs to a motherboard through a flexible connector portion of the membrane.

Abstract: A mixer with a filtering function and a method for linearization of the mixer are provided. The mixer includes at least one amplifier, a transconductance device and a feedback network. The at least one amplifier is configured to output a filtered voltage signal according to an input voltage signal. The transconductance device is coupled to the at least one amplifier, and is configured to generate a filtered current signal according to the filtered voltage signal. The feedback network is coupled between any output terminal among at least one output terminal of the transconductance device and an input terminal of the at least one amplifier. More particularly, the mixer is configured to output a modulated signal according to the filtered current signal.

Abstract: A light-emitting unit, having a substrate; a first light-emitting body formed on the substrate, and having a first longer side and a first shorter side; a second light-emitting body formed on the substrate, and having a second longer side and a second shorter side which is parallel to the first longer side; a third light-emitting body formed on the substrate, having a third longer side and a third shorter side which is parallel to the first longer side, and electrically connected to the first light-emitting body and the second light-emitting body; a first electrode covering the first light-emitting body and the second light-emitting body, and electrically connecting to the first light-emitting body; a second electrode separated from the first electrode, and covering the second light-emitting body without covering the first light-emitting body; and a transparent element enclosing the first light-emitting body, the second light-emitting body, and the third light-emitting body.

Abstract: A Totem Pole PFC circuit includes at least one fast-switching leg, a slow-switching leg, and a control unit. Each fast-switching leg includes a fast-switching upper switch and a fast-switching lower switch. The slow-switching leg is coupled in parallel to the at least one fast-switching leg, and the slow-switching leg includes a slow-switching upper switch and a slow-switching lower switch. The control unit receives an AC voltage with a phase angle, and the control unit includes a current detection loop, a voltage detection loop, and a control loop. The control loop generates a second control signal assembly to respectively control the slow-switching upper switch and the slow-switching lower switch. The control loop controls the second control signal assembly to follow the phase angle, and dynamically adjusts a duty cycle of the second control signal assembly to turn on or turn off the slow-switching upper switch and the slow-switching lower switch.