Abstract: A contactor for a vehicle, includes: a first wiring terminal, a second wiring terminal, a conducting bar, and a driving assembly. A first conduction section and a second conduction section of the conducting bar are connected to each other and are configured to rotate with respect to each other. The first conduction section is fixed on the first wiring terminal, and the second conduction section is electrically connected to or electrically disconnected from the second wiring terminal. The driving assembly is configured to drive the second conduction section to move toward or away from the second wiring terminal. The first wiring terminal and the second wiring terminal are disposed opposite to the conducting bar in a first direction, the driving assembly is disposed opposite to the conducting bar, or the first wiring terminal, or the second wiring terminal in a second direction different from the first direction.

Abstract: The present disclosure provides an LED display device.

Abstract: The disclosure provides a Light Emitting Diode (LED) display screen, which includes a box body, a power box, a display module and a sealing assembly. The sealing assembly includes: a sealing frame, which is disposed at the first wiring hole and provided with a second wiring hole for avoiding the connecting wire, and a floating gap is formed between the sealing frame and the power box; a first elastic seal ring, which is disposed on the sealing frame and surrounds the second wiring hole, and the display module is connected with the sealing frame and is in butt fit with the first elastic seal ring; and a second elastic seal ring, an outer side of the second elastic seal ring is connected with the power box, an inner side of the second elastic seal ring is connected with the sealing frame and surrounds the second wiring hole.

Abstract: The present disclosure provides an LED display module and an LED display device. The LED display module includes a display module body and a lock. The lock includes: a lock seat arranged on a rear side of the display module body; a lock cylinder rotatably arranged in the lock seat; a locking member; an interference member rotatably sleeved on the lock cylinder and spaced apart from the locking member along the axial direction of the lock cylinder, the interference member having an interference position where the interference member locates on a front side of a connecting beam for lifting up the display module body and an avoidance position where the interference member avoids the connecting beam; and an elastic linkage member arranged between the locking member and the interference member. When the locking member is in an unlocking position, the interference member is driven to an interference position by the elastic linkage member.

Abstract: High accuracy current sense circuitry for power switching devices comprising GaN power transistors provides for current feedback functions, e.g. current loop control, over-current protection (OCP) and short-circuit protection (SCP). The current sense circuitry comprises a current mirror sense GaN transistor (Sense_GaN) and a power GaN transistor (Power_GaN) and a sampling circuit. The sampling circuit comprises first and second stage operational amplifiers to provide fast response and improved current sense accuracy, e.g. better than 1%, over a range of junction temperatures Tj. The Sense_GaN, Power_GaN and first stage operational amplifier have a common ground referenced to a Kelvin Source of the Power_GaN, so that the Sense_GaN and Power_GaN operate with the same gate-to-source voltage Vgs, to provide an accurate current ratio. Applications include current sensing for switching mode power supplies that need high speed and lossless current sense for current protection and feedback.

Abstract: An architecture for a multi-port AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises power management control (PMC) for PFC On/Off Control and Smart Power Distribution, and optionally, a boost follower circuit. For example, in a universal AC/DC multi-port USB-C Power Delivery (PD) adapter, PMC enables turn-on and turn-off of PFC dependent on output port operational status and a combined load of active output ports. A microprocessor control unit (MCU) receives operational status, a voltage sense input and a current sense input for each USB port, computes output power for each USB port, and executes a power distribution protocol to turn-on or turn-off PFC dependent on the combined load from each USB port. Available power may be distributed intelligently to one or more ports, dependent on load. In an example embodiment, turning-off PFC for low load and low AC line input increases efficiency by 3% to 5%.

Abstract: An AC/DC Switching Mode Power Supply (SMPS) comprises a PFC stage, an isolated LLC DC/DC converter stage, and a control circuit that provides feedback/control signals to PFC and LLC controllers, to enable a plurality of operating modes, dependent on a sensed peak AC input voltage and required output voltage Vo. The PFC provides a first DC bus voltage Vdc (e.g. 200V) for low line AC input and a second DC bus voltage (e.g. 400V) for high line or universal AC input. A multi-mode LLC converter is operable in a half-bridge mode or a full-bridge mode. For low line AC input, output voltage Vo, and PFC output Vdc, the LLC operates in full-bridge mode; for high line input, output voltage Vo and PFC output 2×Vdc, the LLC operates in half-bridge mode; for universal AC input, output voltage 2×Vo, and PFC output 2×Vdc, the LLC operates in full-bridge mode.

Abstract: An AC/DC Switching Mode Power Supply (SMPS) comprises a PFC stage, an isolated LLC DC/DC converter stage, and a control circuit that provides feedback/control signals to PFC and LLC controllers, to enable a plurality of operating modes, dependent on a sensed peak AC input voltage and required output voltage Vo. The PFC provides a first DC bus voltage Vdc (e.g. 200V) for low line AC input and a second DC bus voltage (e.g. 400V) for high line or universal AC input. A multi-mode LLC converter is operable in a half-bridge mode or a full-bridge mode. For low line AC input, output voltage Vo, and PFC output Vdc, the LLC operates in full-bridge mode; for high line input, output voltage Vo and PFC output 2×Vdc, the LLC operates in half-bridge mode; for universal AC input, output voltage 2×Vo, and PFC output 2×Vdc, the LLC operates in full-bridge mode.

Abstract: An AC input AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises a boost follower circuit (BFC), a hybrid bulk capacitance circuit (HBCC) and driver and control circuitry. The BFC senses the peak AC input voltage and adjusts a PFC output voltage Vdc dependent on the AC input voltage, to improve low line efficiency and reduce losses. The BFC may provide a stepless or step regulation mode to follow the AC input line voltage. The driver and control circuitry coordinates operation of the BFC and HBCC. The driver and control circuitry comprises comparator circuitry, which enables selective connection of bulk capacitors of different voltage ratings, responsive to a sense voltage from the BFC, to meet requirements for ripple voltage and hold-up times for different Vdc. This solution provides a reduction in capacitor height and volume, with associated improvement in the power density of an isolated AC/DC power supply.

Abstract: Embodiments of the present invention relate to use of a GP73 inhibitor in preparation of a drug for treating diabetes. In the embodiments of the present invention, the inventor finds that GP73 plays a key role in blood glucose regulation, and in particular, finds that soluble GP73 can specifically bind to glucagon to form a complex, enhances the blood glucose-rising function and gluconeogenesis function of glucagon and prolongs the half-life of glucagon; and finds soluble GP73 can activate the glucose production in liver and/or kidney and a gluconeogenesis signaling pathway in a glucagon-independent manner. Based on the blood glucose regulation effect of the GP73 described above, the inventor also proves through animal experiments: the GP73 inhibitor can reduce the blood glucose level and glycated hemoglobin level of diabetic mice and have a protective effect on islet ? cells, and thereby having the effect of treating diabetes.

Abstract: An architecture for a multi-port AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises power management control (PMC) for PFC On/Off Control and Smart Power Distribution, and optionally, a boost follower circuit. For example, in a universal AC/DC multi-port USB-C Power Delivery (PD) adapter, PMC enables turn-on and turn-off of PFC dependent on output port operational status and a combined load of active output ports. A microprocessor control unit (MCU) receives operational status, a voltage sense input and a current sense input for each USB port, computes output power for each USB port, and executes a power distribution protocol to turn-on or turn-off PFC dependent on the combined load from each USB port. Available power may be distributed intelligently to one or more ports, dependent on load. In an example embodiment, turning-off PFC for low load and low AC line input increases efficiency by 3% to 5%.

Abstract: An architecture for a multi-port AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises power management control (PMC) for PFC On/Off Control and Smart Power Distribution, and optionally, a boost follower circuit. For example, in a universal AC/DC multi-port USB-C Power Delivery (PD) adapter, PMC enables turn-on and turn-off of PFC dependent on output port operational status and a combined load of active output ports. A microprocessor control unit (MCU) receives operational status, a voltage sense input and a current sense input for each USB port, computes output power for each USB port, and executes a power distribution protocol to turn-on or turn-off PFC dependent on the combined load from each USB port. Available power may be distributed intelligently to one or more ports, dependent on load. In an example embodiment, turning-off PFC for low load and low AC line input increases efficiency by 3% to 5%.

Abstract: An architecture for a multi-port AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises power management control (PMC) for PFC On/Off Control and Smart Power Distribution, and optionally, a boost follower circuit. For example, in a universal AC/DC multi-port USB-C Power Delivery (PD) adapter, PMC enables turn-on and turn-off of PFC dependent on output port operational status and a combined load of active output ports. A microprocessor control unit (MCU) receives operational status, a voltage sense input and a current sense input for each USB port, computes output power for each USB port, and executes a power distribution protocol to turn-on or turn-off PFC dependent on the combined load from each USB port. Available power may be distributed intelligently to one or more ports, dependent on load. In an example embodiment, turning-off PFC for low load and low AC line input increases efficiency by 3% to 5%.

Abstract: A bulk capacitor circuit for an AC input AC/DC Switching Mode Power Supply, such as an AC/DC adapter/charger without active power factor correction, is provided, comprising a plurality of bulk capacitors having different voltage ratings, and driver and control circuitry comprising AC input voltage sensing and comparator circuitry, which enables selective connection of one or more of the plurality of bulk capacitors, responsive to a sensed AC input voltage range. A startup circuit provides power to the driver circuit initially, so that the AC input voltage can be determined before power-up and enabling of the DC/DC converter. This solution provides for a reduction in capacitor volume, with associated improvement in the power density of an isolated AC/DC power supply, while the startup circuit ensures that an appropriate bulk capacitance is connected at startup for low line AC input, to maintain the ripple voltage in an appropriate range for reliable operation.

Abstract: A smart power hub has an AC port, a first DC port to a car battery, a second DC port to DC devices such as car instruments, and a third DC port to solar panels or another smart power hub. An AC bi-directional converter has six transistors in a B6 configuration to convert three-phase AC, acting as an interleaved totem-pole Power-Factor-Corrector for one-phase AC. A switch connects the DC bi-directional converter with either the AC bi-directional converter or the solar panels on the third DC port. A link capacitor has a DC link voltage that rises during battery charging. A DC bi-directional converter has a transformer, a primary bridge connected to the DC link voltage, and a secondary bridge of transistors connected to the first DC port. Auxiliary windings in the transformer drive a rectifier to the second DC port to power on-board DC devices. Solar DC charges the battery without AC conversion.

Abstract: The invention relates to a crucible for crystal growth and a method for releasing thermal stress of silicon carbide crystals. The crucible is a crucible in contact with the side surface of the prepared crystals, and the crucible has an annular non-closed splicing structure. The crucible for the crystal growth has the annular non-closed splicing structure, so that the crystals can be prevented from being hooped, hot stress concentrated in the crystals in the growth process of the crystals can be effectively released, the fracturing rate of the crystals can be reduced, and the finished product rate of the crystals can be increased.

Abstract: A circuit for a multi-voltage input AC/DC charger, such as a Universal AC input AC/DC charger, is provided, comprising a plurality of capacitors having different voltage ratings that are connected in parallel, and a switching circuit comprising input voltage sensing and comparator drive circuitry, to allow for selective connection of one or more of the plurality of capacitors, responsive to a sensed input voltage. Since bulk capacitors occupy a significant proportion of the volume of an AC/DC charger, this solution provides for a reduction in system volume, with associated improvement in the power density of an isolated AC/DC charger.

Abstract: High accuracy current sense circuitry for power switching devices comprising GaN power transistors provides for current feedback functions, e.g. current loop control, over-current protection (OCP) and short-circuit protection (SCP). The current sense circuitry comprises a current mirror sense GaN transistor (Sense_GaN) and a power GaN transistor (Power_GaN) and a sampling circuit. The sampling circuit comprises first and second stage operational amplifiers to provide fast response and improved current sense accuracy, e.g. better than 1%, over a range of junction temperatures Tj. The Sense_GaN, Power_GaN and first stage operational amplifier have a common ground referenced to a Kelvin Source of the Power_GaN, so that the Sense_GaN and Power_GaN operate with the same gate-to-source voltage Vgs, to provide an accurate current ratio. Applications include current sensing for switching mode power supplies that need high speed and lossless current sense for current protection and feedback.

Abstract: A bulk capacitor circuit for an AC input AC/DC Switching Mode Power Supply, such as an AC/DC adapter/charger without active power factor correction, is provided, comprising a plurality of bulk capacitors having different voltage ratings, and driver and control circuitry comprising AC input voltage sensing and comparator circuitry, which enables selective connection of one or more of the plurality of bulk capacitors, responsive to a sensed AC input voltage range. A startup circuit provides power to the driver circuit initially, so that the AC input voltage can be determined before power-up and enabling of the DC/DC converter. This solution provides for a reduction in capacitor volume, with associated improvement in the power density of an isolated AC/DC power supply, while the startup circuit ensures that an appropriate bulk capacitance is connected at startup for low line AC input, to maintain the ripple voltage in an appropriate range for reliable operation.

Abstract: A circuit for a multi-voltage input AC/DC charger, such as a Universal AC input AC/DC charger, is provided, comprising a plurality of capacitors having different voltage ratings that are connected in parallel, and a switching circuit comprising input voltage sensing and comparator drive circuitry, to allow for selective connection of one or more of the plurality of capacitors, responsive to a sensed input voltage. Since bulk capacitors occupy a significant proportion of the volume of an AC/DC charger, this solution provides for a reduction in system volume, with associated improvement in the power density of an isolated AC/DC charger.