DATASHEET and Circuit Diagram

Selecting an SiC Schottky boost diode is different from a Silicon diode because of its superior reverse characteristics (the virtual zero reverse recovery current) of this device. And in the following article you are provided with informations regarding on how to select SiC Schottky for different power rated bost converter typically for a Continuous Conduction Mode (CCM) PFC applications.

You will be taken into a Mathcad sections which describe you with detailed explanations and calculations for selecting SiC Schottky diodes as mentioned above. The figure shows you a typical active PFC boost converter circuit diagram which perform an active power factor correction boost converter. This is why the SiC Schottky diode has been used, to avoid the switching loss in the diode itself and in order to meet efficiency and thermal specifications.

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Driving the LEDs can be in parallel and/or series connections. It has both their own advantages and disadvantages. A weakness of the parallel connection method is that LED current and brightness do not automatically match. White LEDs are popular portable equipment LCD backlights used for such portable equipment like PDAs, cellphones, and digital cameras. A boost converter (charge-pump, inductor-based), is needed since the battery voltage of most handheld devices is too low for either method.

According to the following article, there are three main methods of driving LEDs parallel connections: using an existing supply for independently regulate the current through each LED, regulate the supply voltage only and rely on LED matching and series resistors for current matching, and matching the remaining LEDs by regulate current through one LED and rely on LED matching and series resistors. For each of those main parallel methods are illustrated in circuit diagrams.

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This 2-Channel RS485 Converter device converts unbalanced, full duplex RS232 signals to balanced full /half duplex RS485  signals. Below we provide you with RS232 to RS485 Converter Informations and the interconnection circuit schematic of two RS485 using two signal wires.

It is based on their each port that RS232 port has a male DB25P type of connector with pins 2 (TD input) and 3(RD output) supported and RS485 port has a female DB25S type of connector with the Send Data outputs on pins 2 and 14, and Receive Data inputs on pins 3 and 16 or 5 and 17.

At the two RS484 interconnection circuit above, the resistors should be about the impedance of the line used and in no case less than 120 Ohms each. The resistor Rt is optionally valued depending on the line length, baud rate and etc (provided also with component replacements for changing baud rate timeouts in a table). Put a 100 Ohm half watt resistor between pin 7 and the “reference” wire at every drop point for safety, since the  RS-485 Standard recommends a third wire be used for presenting a signal return path proper operation.

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Switching regulators rapidly switch a series device on and off, it offers higher power conversion efficiency and design flexibility, that is why they are increasing in its popularity for such that reason. Herein, you will be provided with basic operating principles of switching regulator (switching converter) such as Buck, Boost, Buck-Boost, and Flyback converter types along with circuit diagrams of those regulators.

First of all you will be taken into sections discuss about the basic elements of power conversions (law of inductance, two important characteristics of inductor that follow the law), transformer operation including the circuit example (spark firing circuit), and the pulse width modulation (PWM).

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Below is the White Circuit Schematic figure which is used in the booster synchrotron. The following file will summarize you with informations regarding the operation performance of the White circuit and to make the White circuit magnet current controllable. The aim is that it will help to find the strategy for reducing the fluctuation of the beam current.

Accordingly, the booster synchrotron consist of three families of magnet systems (dipole, the focusing quadrupole and the defocusing quadrupole magnets) with 12 magnets for each of those group. In the White Circuit, two coupled resonant circuits comprise the circuit with A bypass capacitor and a DC power supply connect two resonant LC circuits. Each White circuit is excited by an IGBT based DC and AC power supply, which are independent power supply souces.

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Since Silicon Carbide (SiC) transistors can stand on higher temperatures, it is possible to use those devices into the standard internal combustion engine (ICE) water cooling system of a hybrid car which needs to be separated from the main cooling system. The article below shows that SiC bipolar junction transistors (SiC BJT) can be used for improving Hybrid Car Exiting Cooling System.

The figure performs a test rig circuit diagram (click to enlarge), a high quality laboratory test for testing the SiC transistors and extract its behaviour. It will simulate a working environment for a transistor in a motor drive for Belt driven Alternator Starter (BAS) in a hybrid car of medium size, and this model uses three phase inverter of PSpice model of SiC BJT to simulate an inverter for 5 kW electric machine.

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