We live in a world where design engineers are on a seemingly constant pursuit for higher efficiency. Everyone wants to do more with less power. Higher system efficiency is a team effort that includes (but is not limited to) better-performing gate drivers, controllers and new wide-bandgap technologies. In this multi-part video series, we will focus on the gate drivers and how choosing the right driver can help your whole system design. You will learn about important gate driver specs, why they’re important, and how they can influence the systems around them.
Power Switching Device Cannot Drive Themselves - Mastering the Art of High Voltage Gate Driver Design in UPS, Telecom, and Servers
We live in a world where designers are constantly pursuing higher efficiencies and higher power densities. Our customers want more power out with less power loss, while achieving smaller solution sizes! They strive to reduce switching losses while maintaining signal integrity. The need for higher efficiency and power density is a trend seen across isolated and non-isolated power systems in Uninterruptible Power Supplies (UPS), Telecom Rectifiers, and Server PSUs.
We are all well aware that the demand for Electric Vehicles (EV) is increasing rapidly. This eight-part training session begins with a description of a typical EV system in part 1. Part 2 is a brief description of how both Lead Acid and Lithium Ion batteries are charged. Part 3 focuses on the types of power factor and harmonic currents. Part 4 discusses power factor correction and the typical boost PFC stage. Part 5 concentrates on the Phase Shifted Full Bridge topology, including the reasons why it is used and a detailed description of how it operates.
The Phase Shifted Full Bridge (PSFB) has always been considered the best design for high power DC/DC conversion. However, a newer technology called Full Bridge LLC (FB-LLC) has recently been used and accepted for high power DC/DC conversion. In this 3 part series, we will go in-depth in discussing the pros and cons of both the PSFB and FB-LLC. We will then compare the basic problems between the PSFB and FB-LLC and give ideas on how to choose between the two given a certain application. Lastly, we will review some Reference Designs.
In this training series, we will touch the gate driver applications, fundamentals of low side gate driver, high- and low side gate driver and isolated gate driver. And we will surely go deep and help you understand the gate driver design considerations with TI reference design and the corresponding critical waveforms.
The first section will discuss the applications where the different kinds of gate driver will be used, and we will also identify the gate drivers location used in each typical system architecture.
This training video will be introducing Popular Power Semiconductors - Si-MOSFETs, IGBTs, SiC-MOSFETs and GaN, and identify the differences among this devices in the perspective the gate driver design and select consideration.
This training video illustrates the operation fundamentals for the low side and half-bridge gate driver.
This training video discusses the gate driver select considerations and key specifications, and also introduces the novel gate driver specs for high end gate driver.
This training series will firstly discuss the isolation requirement in power electronics system, and then compare the different driver isolation implementation methodologies. Integrated isolated gate driver shows the best performance in the perspective of size, performance and reliability.
This training video will firstly discuss the configuration of the UCC2x52x gate driver and it featured benefits, then a detailed bench experiment comparison shows that UCC2x52x family gate drivers has better dynamic performance as well as stable and predictable source/sink peak current.
This training video will help to understand the UCC2152x's output configuration and grounding consideration when driving FETs and IGBTs with negative voltage bias. Three different implementation methods are introduced, pros and cons of each methods are illustrated.
Gate driver design deep dive outline:
-Parasitics in gate driver-Gate driver soft/hard switching difference-Strong gate driver and MOSFET nonlinear COSS-Common mode transient immunity(CMTI), dV/dt and di/dt through parasitics L, and C?-How to separate power ground noise by PCB layout?-Power supply for isolated gate driver in UPS, server and Telecom system-TIDA and Experimental waveforms
In this training video, parasitics in the gate driver system is identified. Piece-wise linear switching sequence at turn on/off is illustrated. Reverse recovery introduced additional complexity on turn-on transition is explained with comparison of MOSFETs and IGBTs.
In this training video, soft switching ZVS converters, including totem-pole PFC and LLC resonant converter, is mentioned to improve all the all the issues of hard-switching, especially the reverse recovery of the diode. Differences of gate driver on hard-switching and soft-switching is highlighted and explained. New issues of soft switching, high turn-off current, is also discussed with strong gate driver to minimize the turn-off loss. LLC resonant converter turn-off loss mechanism is illustrated in depth.
This training video discusses the strong gate driver introduced high dv/dt and di/dt during turn-on and turn-off switching transition, and also illustrate the high dv/dt and di/dt introduced noise through the parasitic capacitance/inductance on high side level-shift and junction capacitance on the bootstrap diode. Solutions with new state-of-the-art gate driver and its key features are introduced and explained.