Abstract: The present application relates to a DCDC circuit, a circuit start-up method, and an electronic device. The DCDC circuit includes a transformer circuit, a synchronous rectification circuit, and a control circuit; wherein the control circuit is configured to control a turn-on duration of a first switch and a turn-on duration of a second switch in a first bridge circuit of the transformer circuit to increase progressively every switching cycle until an output voltage of the transformer circuit is greater than a first target voltage; and control a turn-on duration of a third switch and a turn-on duration of a fourth switch in a second bridge circuit of the synchronous rectification circuit to increase progressively every switching cycle until an output voltage of the synchronous rectification circuit is greater than a second target voltage.

Abstract: Provided by the present disclosure are a power supply circuit and a charging device. The power supply circuit comprises a pulse transformer circuit and a first power supply conversion circuit. The pulse transformer circuit comprises a pulse transformer and a switch control circuit; a primary winding of the pulse transformer is connected to a power supply and is connected to the switch control circuit, and the switch control circuit is used to modulate the voltage on the primary winding into a pulse voltage; and the input terminal of the first power supply conversion circuit is connected to a secondary winding of the pulse transformer, and is used to transform the voltage on the secondary winding of the pulse transformer into a first preset voltage range when the voltage outputted by the secondary winding exceeds the first preset voltage range, and then output the voltage.

Abstract: A rechargeable device and a charging method are disclosed. The rechargeable device includes a charging interface, a battery unit, a first switch unit and a second switch unit, a first control unit coupled to the first switch unit, and a second control unit coupled to the second switch unit. The first control unit is configured to control the first switch unit to be turned on in response to the charging path being needed to be on, and to control both the first switch unit and the second switch unit to be turned off in response to the charging path being needed to be off. The second control unit is configured to control the second switch unit to be turned on or off in response to the first control unit controlling the first switch unit to be turned on.

Abstract: A charging circuit is provided. The charging circuit is applied to an electronic device. The charging circuit includes a resonant circuit and a voltage transformer circuit. The resonant circuit is configured to convert a received DC signal into an AC signal. The voltage transformer circuit includes a primary winding and a secondary winding. The primary winding is connected to an output end of the resonant circuit. The primary winding is coupled to the secondary winding. The voltage transformer circuit is configured to transform a first voltage of the AC signal into a second voltage through the primary winding and the secondary winding. The second voltage is configured to supply electrical energy to an electricity-consuming apparatus. The second voltage is less than or equal to the first voltage.

Abstract: The voltage conversion circuit includes a first direct-current conversion circuit connected to an electric load, a secondary transformer coil connected to the first direct-current conversion circuit, and a primary transformer coil coupled to the secondary transformer coil. The primary transformer coil is configured to generate, based on an initial voltage inputted to the primary transformer coil, an electromagnetic field and couple the electromagnetic field to the secondary transformer coil. The secondary transformer coil is configured to generate an induced current by virtue of the electromagnetic field, generate a secondary output voltage based on the induced current, and transmit the secondary output voltage to the first direct-current conversion circuit. The first direct-current conversion circuit is configured to adjust, based on a predetermined demand voltage of the electric load, the secondary output voltage to obtain a target voltage.

Abstract: An adapter and a control method are provided. The adapter includes a transformer, at least one first transistor, a control unit, and a first microwave unit. The at least one first transistor is connected to a primary side of the transformer, and is configured to perform a chopping modulation on a voltage input to the transformer. The control unit is configured to output a first control signal. The first microwave unit includes a first transmitting terminal and a first receiving terminal. The first transmitting terminal is configured to convert the first control signal into a first microwave signal and transmit it to the first receiving terminal of the first microwave unit. The first receiving terminal is configured to convert the first microwave signal into the first control signal to control the at least one first transistor to be turned on or off.

Abstract: A power supply device, includes a rectifier circuit configured to perform rectification on alternating-current power to obtain a first pulsating direct-current voltage, a first-stage conversion circuit connected to the rectifier circuit and configured to perform isolation conversion on the first pulsating direct-current voltage to thereby obtain a second pulsating direct-current voltage; a second-stage conversion circuit connected to the first-stage conversion circuit and configured to convert the second pulsating direct-current voltage into a stable direct-current voltage; and a valley-fill circuit connected to the rectifier circuit and the first-stage conversion circuit individually, wherein the valley-fill circuit is configured to supply, in response to a voltage value of the first pulsating direct-current being less than a first voltage threshold, electrical power to an input of the first-stage conversion circuit to thereby increase a valley voltage of the first pulsating direct-current voltage.

Abstract: The present invention provides a method for analysis and determination of the heavy metal occurrence key mineral phases in industrial solid waste, by performing N concentration gradients dissociation determination of the heavy metal solid waste to be tested under the same dissociation conditions, to give the dissociation degrees of the heavy metal elements to be tested at N different concentration gradients; the dissociated solid residues after dissociation being quantitatively analyzed for the mineral phase, to give the relative content of each mineral phase in the M mineral phases of the heavy metal solid waste to be tested; then calculating to give the occurrence distribution proportion of the heavy metal elements in the mineral phase, which are accumulated from high to low; the occurrence key mineral phase whose cumulative occurrence proportion exceeds the preset cumulative threshold value is determined to be the key mineral phase of the heavy metal elements.

Abstract: Provided are a power supply conversion device and a charging control method. The device includes: a transformer; a first rectifier circuit connected to a primary winding of the transformer, for converting a received alternating current into a first direct current, a voltage value of the first direct current being a first direct-current voltage, and the transformer is used for converting the first direct-current voltage into a second direct-current voltage; a voltage converter connected to a secondary winding of the transformer, for converting the second direct-current voltage to output a constant direct-current voltage or a pulsating direct-current voltage; and a controller connected to the first rectifier circuit and the voltage converter, for controlling the voltage converter to selectably output the constant direct-current voltage or the pulsating direct-current voltage according to a desired charging mode of a device to be charged.

Abstract: A power supply device and a charging control method are provided. The power supply device includes a first-stage conversion circuit and a second-stage conversion circuit; the first-stage conversion circuit is used for converting a received alternating current voltage into a pulsating direct current voltage, the voltage value of the pulsating direct current voltage being greater than the voltage value of the alternating current voltage; the second-stage conversion circuit is connected to the first-stage conversion circuit, and used for converting the pulsating direct current voltage to output a constant direct current voltage.

Abstract: The present application provides a wireless charging method, a wireless charging apparatus, and a storage medium. The method includes: detecting, in response to performing wireless charging, a charging parameter of a converter, wherein the charging parameter includes at least one parameter of an input current, an input voltage, an output current and an output voltage; determining a target operation mode according to the charging parameter, wherein the target operation mode is configured to determine a power-drawing mode of the converter; and controlling the converter to switch to the target operation mode, and charging a to-be-charged device.

Abstract: Provided are a switch control circuit and method, and an electronic device. The switch control circuit includes a voltage conversion module and a control module. The voltage conversion module operates, based on a received input voltage, in at least one of a boost mode, a buck mode and a buck-boost mode. The control module controls switching frequencies of first, second, third and fourth switches of the voltage conversion module. In the boost mode, the first and third switches are switched, at a first switching frequency, between an on-state and an off-state, and the second and fourth switches are switched, at a second switching frequency larger than the first switching frequency, between the on-state and the off-state. In the buck mode, each of the first and third switches is switched at the second switching frequency, and each of the second and fourth switches is switched at the first switching frequency.

Abstract: In embodiments of the present disclosure, after a mobile terminal recognizes a type of a power adapter, the mobile terminal transmits indication information to the power adapter. The indication information is configured to indicate that the mobile terminal has recognized the type of the power adapter and instruct the power adapter to activate a quick charging process. The power adapter then negotiates with the mobile terminal via the quick charging process to determine charging parameters, and charges a battery of the mobile terminal in a multi-stage constant current mode.

Abstract: A congestion control method and an apparatus are disclosed. The method includes: after a sending device generates an unscheduled data packet of a first flow, if it is determined, based on an unscheduled packet send window shared by all flows, that the unscheduled data packet meets a sending condition, determining whether to request to add a quota for at least one of the unscheduled packet send window and a scheduled packet send window corresponding to the first flow; and if it is determined that the quota is requested to be added for the at least one of the unscheduled packet send window and the scheduled packet send window corresponding to the first flow, setting indication information in the unscheduled data packet, and sending, to a receiving device, the unscheduled data packet in which the indication information is set.

Abstract: A charging control apparatus, a device to be charged, and a charging control method are provided. The charging control apparatus includes: a first charging channel configured to charge a plurality of cells coupled in series according to a charging signal provided by a first-type power supply device; a second charging channel configured to charge a part of the cells in the plurality of cells according to a charging signal provided by a second-type power supply device; and an equalizing circuit configured to equalize a voltage of the plurality of cells during an operating process of the second charging channel.

Abstract: After a mobile terminal recognizes a type of a power adapter, the mobile terminal transmits indication information to the power adapter. The indication information is configured to indicate that the mobile terminal has recognized the type of the power adapter and instruct the power adapter to activate a quick charging process. The power adapter then negotiates with the mobile terminal via the quick charging process to determine charging parameters, and charges a battery of the mobile terminal in a multi-stage constant current mode.

Abstract: A power supply device, a circuit control method and a power supply system, belonging to the field of power supply conversion technologies. The power supply device can ensure that a second-stage conversion circuit has a sufficiently high valley voltage by means of a valley-fill circuit without using an electrolytic capacitor or other large-volume capacitors, thereby ensuring that the output voltage of the power supply device is overall stable. On the other hand, the power supply device can, by controlling the voltage of an energy storage unit, utilize the ability of the energy storage unit to store electric energy as far as possible whilst ensuring that the voltage does not exceed a specific voltage, so as to lower the requirements on the voltage resistance of the energy storage unit, thereby realizing the miniaturized design of the power supply device and improving the portability of the power supply device.

Abstract: A power supply, a power supplying method, and a computer-readable storage medium are provided. The power supply includes a rectifier circuit and a valley-fill circuit. The rectifier circuit is used for voltage transformation of an input AC voltage to obtain a first pulsating DC voltage. The valley-fill circuit includes at least one energy storage capacitor and is used for storing energy through the at least one energy storage capacitor when the first pulsating DC voltage output by the rectifier circuit is in a first preset range and providing energy through the at least one energy storage capacitor when the first pulsating DC voltage output by the rectifier circuit is lower than a preset threshold, thereby to increase the valley voltage of the first pulsating DC voltage.

Abstract: Provided are a power supply apparatus, and a charging method and system. The apparatus includes: a rectifier module (210) configured to rectify an alternating current (alternating current) voltage to obtain a first pulsating direct current (direct current) voltage; a conversion module (300) configured to convert the first pulsating direct current voltage to obtain a stable direct current voltage; and a valley-fill circuit (220) having an input terminal connected to an output terminal of the rectifier module (210) and an output terminal connected to an input terminal of the conversion module (300). The valley-fill circuit (220) is configured to release electric energy to the conversion module (300) when a voltage value of the first pulsating direct current voltage is smaller than a first voltage threshold, to increase a valley voltage of the first pulsating direct current voltage inputted to the conversion module (300).

Abstract: A method of distributed resource management in a distributed computing system includes determining usage of respective hardware resources by an application and generating usage metrics for the application, and assigning the application to a cluster of hardware resources to optimize diversity of usage of hardware resources in the cluster and to enhance utilization of the hardware resources by applications running in that cluster. The diversity of usage of the hardware resources is determined from respective usage metrics of the respective applications running in that cluster. The diversity of usage of the hardware resources in the cluster is optimized by assigning the application to a diversity pool of hardware resources adapted to minimize interference when applications assigned to the diversity pool of hardware resources access the hardware resources in the diversity pool and assigning applications from different diversity pools to the cluster of hardware resources.