Category | MOSFET

Low loss, High Current SiC MOSFET Module

Posted on 11 September 2013

  ROHM Semiconductor introduced 1200V 120A full SiC (Silicon Carbide) power module composed of SiC Schottky barrier diodes (SBDs) and SiC MOSFETs. When compared with conventional IGBT modules, this module can reduce switching loss by 85%. However, this module is not necessarily enough to drive higher current, which is required from many industrial applications. This [...]

DC link voltage with optimised dynamic feedback

Overvoltage Limitation for Power Transistors

Posted on 03 June 2013

                    Overvoltage limitation between main terminals Measures to limit overvoltages between main terminals (collector-emitter voltage, DC link voltage) can be divided into passive snubber networks, active clamping, and dynamic gate control. Irrespective of the type of overvoltage limitation, the avalanche operation mode of a MOSFET can [...]

Development of MOSFET Technologies

Posted on 12 April 2013

              Power electronics largely use the vertical structure, where gate and source terminals are located on the chip surface and the drain terminal is on the underside of the chip. The load current is conducted vertically through the chip outside the channel. The VDMOSFET version ( Vertical Double Diffused [...]

Driver Parameters and Switching Properties of IGBTs and MOSFETs

Posted on 18 February 2013

              The important features of driven power MOSFET or IGBT are dependent on VGG+, VGG-, and RG ratings. The table below lists many of these features and provides an initial overview of how they relate to VGG+, VGG-, and RG. The symbols in the table are to be interpreted [...]

Protection and monitoring functions for IGBT and MOSFET modules

Posted on 14 February 2013

              To protect MOSFET or IGBT modules in the event of malfunction/errors, the use of different efficient, quick-response protection functions in the driver is recommended; for example, overcurrent and short circuit protection, protection from excessive drain-source or collector-emitter voltage, gate overvoltage protection, overtemperature protection and monitoring of the gate [...]

Types of Faults for IGBT and MOSFET Modules

Posted on 06 February 2013

              Power semiconductors have to be protected from non-permissible stress in every operational state. Leaving SOAs (Safe Operating Areas) leads to damage and therefore reduces component's life. In the worst case scenario, the component will be immediately destroyed. This is why it is important to detect critical states and [...]

SC II characteristics of an IGBT with external dynamic gate voltage limitation

Overload and Short Circuit Behavior of IGBTs and MOSFETs

Posted on 28 January 2013

                    Overload Essentially, the switching and on-state behavior of IGBTs and MOSFETs under overload does not differ from "standard operation" under rated conditions. In order not to exceed the maximum junction temperature and to ensure safe operation, the overload range has to be restricted since increased [...]

Dynamic Properties of MOSFETs

Posted on 07 January 2013

              Power MOSFET properties are strongly influenced by the parasitic elements in the real structure. Forward off-state and avalanche breakdown If a positive drain-source voltage VDS and a gate-source voltage VGS below the gate-source threshold voltage level VGS(th) is applied, only a very small cut-off current IDSS will flow [...]

Introduction to Metal Oxide Semiconductor Field Effect Transistors (MOSFETs)

Posted on 11 October 2012

              A Metal Oxide Semiconductor Field Effect Transistor is a transistor used for amplifying or switching electronic signals. The body of a MOSFET is usually connected to the source terminal which makes it a three-terminal device similar to other Field Effect Transistors (FET). Field effect transistors form a large [...]

Criteria for Successful Selection of IGBT and MOSFET Modules

Posted on 15 April 2012

  Below are several important criteria that should be considered when selecting IGBT and MOSFET modules. 1.) Operating voltage Blocking voltage Since most power modules are used in DC voltage links which are AC-voltage supplied via single-phase or three-phase rectifier bridges, the blocking voltages of IGBT and MOSFET modules are adjusted to common line voltage [...]