Category | Converters / Inverters

Synchronous Buck DC/DC Converter IC Featuring the Industry’s Lowest Minimum ON-Time

Posted on 23 March 2016

  Contributes to greater miniaturization, stable operation, and reduced customer design load in the automotive and industrial markets ROHM has recently announced the development of the BD51180TL, a step-down DC/DC converter featuring the lowest minimum ON time in the industry, making it ideal for high-power applications such as industrial equipment and automotive systems. In recent [...]

Boost DC-DC converter IC

ROHM’s Compact, High-Efficiency, High Power Synchronous Boost DC/DC Converter IC

Posted on 10 March 2016

  Contributes to improved performance and longer battery life in portables such as smartphones and tablets ROHM has recently announced the availability of a compact, high-efficiency, high power synchronous boost DC/DC converter IC optimized for single-cell battery applications. Many of today’s portable devices (i.e. smartphones and tablets) are driven by single-cell li-ion batteries that deliver [...]

E-RA ready for start at Nürburgring Nordschleife

E-RA improves lap time with VISEDO power

Posted on 09 October 2013

              The electric supercar E-RA (Electric RaceAbout) was able to improve the lap time on the Nordschleife track by an impressive 20 seconds to 8:23.56. The electric vehicle is powered by VISEDO PowerMASTER™ inverters and motors based on VISEDO PowerDRUM™ technology. One of the key improvements from the last [...]

Fault Current Detection and Reduction in Converter Circuits

Posted on 08 May 2013

              Errors in converter circuits may be detected at various points. The responses to detected errors, however, may be very different. The term fast protection is used if an error signal is detected in the switch or in close vicinity to the switch and the respective switch is turned [...]

Electromagnetic Interference in Converters (EMI)

Posted on 21 December 2012

              The processes that take place in a converter system will always produce unwelcome electromagnetic interference due to the switching of the power semiconductors, on the one hand (Figure 1), and welcome energy transmission with corresponding signal processing, on the other hand. Figure 1. Energy processes in converters These [...]

Rectifier Circuits

Posted on 10 December 2012

              A rectifier circuit is a circuit that converts an alternating supply current into a direct output current, a process called rectification. Rectification is often accomplished by use of rectifier diodes. Such rectifiers are termed uncontrolled rectifiers. Controlled rectifiers, in contrast, generally rely on the use of thyristors, where [...]

Rectifier Diode Basics

Posted on 27 November 2012

              Rectifier diodes are components with two terminals and are used to rectify alternating currents. Today, the semiconductor diodes used to rectify line voltages are produced mainly on the basis of monocrystalline silicon. Rectifier diodes have an asymmetric current-voltage characteristic (Figure 1). Figure 1. Current-voltage characteristic of a rectifier [...]

Rated Current Load for Rectifier Diodes

Posted on 25 May 2012

              The basis of any software tool used for component design and dimensioning is mathematical equations, diagrams and characteristics. The maximum permissible current load for rectifier diodes is determined by balancing power losses caused by the current flow P = IF×VF and the maximum power dissipation for a given [...]

Fuse Placement in Typical Converter Circuits

Posted on 25 April 2012

                The article "Semiconductor Fuses – General" describes some of the fundamental principles that guide the positioning of fuses in power electronic circuits. Below are several examples of how these principles are implemented in typical converter circuits.   Phases Bridge   Phases bridges have many different kinds of [...]

Main Advantages of 3-level Inverters

Posted on 16 April 2012

  3-level inverters can be used in many applications, notably UPS and solar inverters. The main advantages of 3- level inverters are: Smaller output voltage steps that mitigate motor issues due to long power cables between the inverter and the motor Improvement of spectral performance Reduction of size and filter of the inverter Increasing of switching frequency [...]