Abstract: The present invention provides composites with controllable superhydrophilic and superhydrophobic performances, a 3D printing method and 3D printed parts. The composites with controllable superhydrophilic and superhydrophobic interface performances comprise hydrophobic powder and/or hydrophilic powder and jointing phase powder, wherein the jointing phase powder is thermoplastic polymers. The present invention can print the parts with a continuous wettability change from superhydrophilic to superhydrophobic performances by regulating the mass percentage of the hydrophobic powder, the hydrophilic powder and the jointing phase powder. Furthermore, the present invention can prepare the models with various shapes according to different application scenes, and regulate the interface wettability performances of the models.

Abstract: The present invention provides composites with controllable superhydrophilic and superhydrophobic performances, a 3D printing method and 3D printed parts. The composites with controllable superhydrophilic and superhydrophobic interface performances comprise hydrophobic powder and/or hydrophilic powder and jointing phase powder, wherein the jointing phase powder is thermoplastic polymers. The present invention can print the parts with a continuous wettability change from superhydrophilic to superhydrophobic performances by regulating the mass percentage of the hydrophobic powder, the hydrophilic powder and the jointing phase powder. Furthermore, the present invention can prepare the models with various shapes according to different application scenes, and regulate the interface wettability performances of the models.

Abstract: The present invention pertains to the field of pharmaceutical technology. Specifically, the present invention relates to a zinc risedronate micro/nano adjuvant with sustained-release function formed by mineralization of zinc ions and risedronic acid as main components and its use as a vaccine adjuvant. The present invention also relates to a method for preparing zinc risedronate micro/nano adjuvant. The present invention also relates to a chemical composition, vaccine adjuvant and vaccine composition comprising zinc risedronate micro/nano adjuvant. The present invention also relates to a use of zinc risedronate micro/nano adjuvant as a vaccine adjuvant.

Abstract: Disclosed is a zinc zoledronate micro-nanoparticle adjuvant, which contains zinc and zoledronic acid and optionally contains a phosphate and aluminum. The preparation method therefor comprises performing mixed precipitation on a soluble salt solution containing zinc ions, zoledronic acid, and sodium hydroxide. The adjuvant can be used to prepare vaccines, etc.

Abstract: Provided is a resistor structure of a series resistor of an Electro-Static Discharge (ESD) device. A poly resistor is divided into N small parts, and each small part is connected to an upper-part metal layer through a respectively corresponding Contact and Via. The Contact and Via corresponding to each small part and the connected upper-part metal layer form an independent unit. A metal aluminum material is adopted for the Via and the upper-part metal layer. The metal aluminum material or an aluminum alloy material is adopted for the Contact. A heat capacity characteristic of metal aluminum is utilized, and an existing structure is ingeniously utilized, so that the resistor may be prevented from being damaged by heating caused by the same ESD current, and meanwhile, an overall size of a circuit where the ESD device is located is greatly reduced.

Abstract: Provided is a low-power-consumption Constant-On-Time (COT) timing circuit design method and a timing circuit. A Resistor-Capacitor (RC) circuit is adopted for timing, to eliminate static power consumption of a timer. A specific structure includes a fourth P-channel Metal Oxide Semiconductor (MOS) transistor M4 of which a source is connected to an input voltage VIN, a gate is connected to a COT control terminal TON_CONTROL and a drain is connected with one end of a fourth resistor R4. The other end of the fourth resistor R4 is connected with one end of a fourth capacitor C4. The other end of the fourth capacitor C4 is grounded. A negative input of a comparator VCMP is connected with a reference voltage, and a positive input is connected between the fourth capacitor C4 and the fourth resistor R4.

Abstract: Provided is a low-power-consumption Constant-On-Time (COT) timing circuit design method and a timing circuit. A Resistor-Capacitor (RC) circuit is adopted for timing, to eliminate static power consumption of a timer. A specific structure includes a fourth P-channel Metal Oxide Semiconductor (MOS) transistor M4 of which a source is connected to an input voltage VIN, a gate is connected to a COT control terminal TON_CONTROL and a drain is connected with one end of a fourth resistor R4. The other end of the fourth resistor R4 is connected with one end of a fourth capacitor C4. The other end of the fourth capacitor C4 is grounded. A negative input of a comparator VCMP is connected with a reference voltage, and a positive input is connected between the fourth capacitor C4 and the fourth resistor R4.

Abstract: An isolated power supply circuit has a first reference ground, a second reference ground, a power source, a first receiving circuit, a second receiving circuit, a first inverter circuit, a second inverter circuit and an isolated conversion circuit. The first reference ground and the second reference ground are isolated from each other. The first receiving circuit is coupled to the first reference ground. The second receiving circuit is coupled to the second reference ground. The power source provides a first power signal for the first receiving circuit directly. The first inverter circuit and the second inverter circuit receive the first power signal and produce a first inverter signal and a second inverter signal. And the isolated conversion circuit outputs a second power signal to the second receiving circuit based on the first inverter signal and the second inverter signal.

Abstract: A method for controlling a multi-channel SMPS having N switching circuits. The method is generating a fast system clock and N load indication signals indicative of load statuses of the N switching circuits, then generating N clock control signals based on the preset pulses of the fast system clock and the N load indication signals. If one of the N switching circuits is detected to transit from a heavy load condition to a light load condition, forming the corresponding clock control signal based on the first pulse of the fast system clock after the corresponding load indication signal transits from the first state to the second state.

Abstract: Provided is a resistor structure of a series resistor of an Electro-Static Discharge (ESD) device. A poly resistor is divided into N small parts, and each small part is connected to an upper-part metal layer through a respectively corresponding Contact and Via. The Contact and Via corresponding to each small part and the connected upper-part metal layer form an independent unit. A metal aluminum material is adopted for the Via and the upper-part metal layer. The metal aluminum material or an aluminum alloy material is adopted for the Contact. A heat capacity characteristic of metal aluminum is utilized, and an existing structure is ingeniously utilized, so that the resistor may be prevented from being damaged by heating caused by the same ESD current, and meanwhile, an overall size of a circuit where the ESD device is located is greatly reduced.

Abstract: An isolated power supply circuit has a first reference ground, a second reference ground, a power source, a first receiving circuit, a second receiving circuit, a first inverter circuit, a second inverter circuit and an isolated conversion circuit. The first reference ground and the second reference ground are isolated from each other. The first receiving circuit is coupled to the first reference ground. The second receiving circuit is coupled to the second reference ground. The power source provides a first power signal for the first receiving circuit directly. The first inverter circuit and the second inverter circuit receive the first power signal and produce a first inverter signal and a second inverter signal. And the isolated conversion circuit outputs a second power signal to the second receiving circuit based on the first inverter signal and the second inverter signal.

Abstract: A boost converter having an inductor having a first terminal coupled to an input port to receive the input voltage; a high side switch coupled between the inductor and an output port; a low side switch coupled between the inductor and a ground reference; and a control circuit configured to receive a feedback signal indicative of the output voltage and a reference signal, and to provide a high side control signal and a low side control signal based on the feedback signal and the reference signal; wherein the low side switch on time period is controlled to be constant by the low side control signal when the input voltage and the output voltage are fixed.

Abstract: A power converter with average current detection and the corresponding detecting method and detecting circuit are disclosed. The average current detecting circuit has an average voltage detecting circuit and a voltage-current converting circuit. The average voltage detecting circuit generates a voltage across a detecting resistor by letting an inductor current flowing through an output inductor of the power converter flowing through the detecting resistor. Further, the average voltage detecting circuit samples the voltage across the detecting resistor when a switch of the power converter transits from an on state into an off state and the opposite and then calculates the average value of the two sampled voltages. The voltage-current converting circuit converts the average value into an average current by multiplying the average value by a scaling factor.

Abstract: A control circuit for a switching power converter is disclosed. The control circuit may comprise an OFF control signal generation module configured to generate an OFF control signal having an inactive logic state and an active logic state. The control circuit is configured to turn OFF a main switch of the switching power converter in response to the active logic state. The OFF control signal generation module can regulate an ON time of the main switch through regulating a change of the OFF control signal from the inactive logic state to the active logic state based on a first capacitor voltage across a first capacitor to maintain a switching frequency of the main switch substantially constant. The first capacitor is charged in a predetermined time since the main switch is turned ON and discharged after the predetermined time.

Abstract: A method for controlling a multi-channel SMPS having N switching circuits. The method is generating a fast system clock and N load indication signals indicative of load statuses of the N switching circuits, then generating N clock control signals based on the preset pulses of the fast system clock and the N load indication signals. If one of the N switching circuits is detected to transit from a heavy load condition to a light load condition, forming the corresponding clock control signal based on the first pulse of the fast system clock after the corresponding load indication signal transits from the first state to the second state.

Abstract: A bootstrap circuit integrated to a voltage converter integrated circuit (IC) and a voltage converter IC for a switch mode voltage regulator. The bootstrap circuit is used to provide a bootstrap voltage signal for driving a high side switch of the voltage converter IC. The bootstrap circuit has a pre-charger and a bootstrap capacitor. The pre-charger provides a first bootstrap signal to pre-charge a control terminal of the high side switch, and the bootstrap capacitor provides a second bootstrap signal to enhance the charge of the control terminal of the high side switch.

Abstract: A short-circuit protection method for a boost converter is disclosed. In this method, a switch of a switching circuit of the boost converter is turned on and a control voltage with a gradually increasing magnitude is supplied to control a short-circuit protection switch coupled between an input voltage and the switching circuit when the boost converter starts up. Then, a current flowing through the switch is detected and compared with a predetermined value. The switch is turned off and a preset time period is initiated if the current is higher than the predetermined value. It is detected whether a short-circuit event occurs at an output terminal of the boost converter at the end of the preset time period. If the short-circuit event occurs, the short-circuit protection switch is then turned off.

Abstract: A control method used in a four-switch buck-boost converter includes: sensing the output voltage and generating a feedback signal; generating a compensation signal based on a reference signal and the feedback signal; sensing the current flowing through the inductor and generating a current sensing signal; comparing the current sensing signal with the compensation signal; turning on the first and third transistors and turning off the second and fourth transistors when the current sensing signal reduces to be lower than the compensation signal; turning off the first transistor and turning on the second transistor when the on-time of the first transistor in one switching period reaches a first time threshold; and turning off the third transistor and turning on the fourth transistor when the on-time of the third transistor reaches a second time threshold.

Abstract: A reference signal generator used with a switching mode power supply which converts an input voltage to an output voltage. The reference signal generator provides a reference signal consisting of a constant voltage signal and a variable voltage signal which is varying according to a duty cycle of the switching mode power supply during a startup period of the switching mode power supply and is varying according to a ratio of the input voltage at an end of the startup period to the input voltage of real time after the startup period.

Abstract: A power converter including a load transient response control module and associated method for controller the power converter. The load transient response control module detects a deviation of an output voltage of the power converter from a desired value of the output voltage and compares the deviation with a first threshold to provide a load response control signal indicating whether load transient change occurs. If the deviation is lower than the first threshold, a clock signal of the power converter is reset and a main switch of the power converter is maintained on during the period when the deviation is lower than the first threshold.