Gate driver

About: Gate driver is a research topic. Over the lifetime, 7532 publications have been published within this topic receiving 75854 citations.

Design Challenges in the Use of Silicon Carbide JFETs in Matrix Converter Applications

Abstract: This paper investigates some of the challenges encountered during the implementation of a Silicon Carbide JFET matrix converter which has been designed to meet a specific power density of 20 kW/L with forced air cooling. After a brief introduction to the main features of the hardware implementation of the power converter, an insight into the control strategy and controller platform adopted is given with a particular attention to the issues relating to the high switching frequencies on the controller requirements and the performance implications of the gate drive circuitry. An analysis of the results which show the effects of gate driver and controller-induced commutation time limitations on the output waveform quality is presented. Wide bandgap semiconductor devices offer the power electronic engineer new opportunities for high-speed, high-efficiency designs but these devices cannot be used as a simple like for like replacements and as such the whole converter system needs to be looked at in order to successfully exploit these devices.

Ground bounce limiting driver using non-linear capacitor

Abstract: A ground-bounce limiting circuit comprised of a non-linear Miller capacitance between the drain and the gate of an output driver. Ground-bound is limited by controlling the time-ramping of the output current by continuously diverting the charge at critical times and thresholds on the gate of the output driver which are being delivered by a predriver.

A High-Dynamic Range Current Source Gate Driver for Switching-Loss Reduction of High-Side Switch in Buck Converter

Abstract: In this letter, a high-dynamic range current source gate driver (HD-CSD) circuit is proposed to reduce the switching loss of the high-side switch in buck converter with wide variation of the gate resistance. Hard switching loss is the major loss in high-side switch and limits the high switching-frequency application of dc-dc converter. Comparing with conventional voltage source gate driver (VSD) and the reported four switches CSD (4S-CSD), the proposed HD-CSD behaves more like the ideal current source driver which can realize the fast switching of power switches to reduce the switching loss. In addition, with proposed HD-CSD, impact of gate resistance that limits the switching speed of the power switch can be greatly reduced. Experimental results are presented to show the power efficiency improvement of buck converter with HD-CSD high-side driver comparing with VSD and 4S-CSD high-side drivers at switching frequency of 1 MHz.

Electric Power Converter

Abstract: Disclosed is an electric power converter comprising a plurality of reactors (4), a plurality of self quenching type switching elements (1), the reactors and switching elements being series-connected per one arm, and surge-absorbing snubber circuits (6,8) connected in parallel to the switching elements respectively, the switching circuits being driven by gate drive circuits (12) connected to respective gates of the switching elements to thereby convert a DC voltage into an AC voltage or convert an AC voltage into a DC voltage, wherein the electric power converter further comprises: means (9,7) for recovering energy accumulated on at least one side of the rectors and the snubber circuits; and means (30) for generating a first DC sourcefor supplying electric power to each of the gate drive circuits, on the basis of the recovered energy. In the electric power converter constituted by a plurality of self quenching type semiconductor switching elements connected in series, high efficiency is attained through reduction in size of the gate driver and electric power saving.

Liquid crystal display and method for driving thereof

Abstract: The present invention relates to a liquid crystal display and a driving method thereof. A liquid crystal display according to the present invention comprises: a liquid crystal panel assembly (1) including a plurality of gate lines, a plurality of data lines which are insulated from and intersects the gate lines, and a plurality of pixels each of which is formed in an area defined by the data line and the gate line and has a switching element connected to the gate line and the data line; a gate driver (2) for supplying gate voltages to the gate lines; at least one data driver (3) for supplying data voltages corresponding to image data to the data lines; and a timing controller (5) for comparing nth image data applied from outside and (n-1)th image data stored therein and selectively providing the nth image data to the data driver depending on the comparison result. According to the present invention, since image data transmission between the timing controller and the data driver can be minimized, power consumption and EMI due to image data switching can be reduced.