Power Seminar, Birmingham, September 26th
Staying updated on the latest technology is one of the many challenges engineers face today. Join us for our eighth season of worldwide technical seminars that begin in Europe in September. These comprehensive one-day seminars offer rich technical and practical presentations ideal for engineers looking for the latest advancements in power supply design.
Premier Farnell has been given 5 free tickets for this seminar; The first 5 people to message Wayne Morgan will be registered free of charge for this event.
Topics
Current Shaping Strategies for Buck Power Factor Correction
Two possible control techniques for a buck PFC converter are proposed, where the input current is indirectly shaped by shaping the inductor current. A thorough analysis on the harmonic content of the AC line current is presented for each control technique to examine the allowable voltage gain (K value) for meeting EN61000-3-2, Class C and D. Results of the harmonic analysis are used to derive the required value of K and therefore VOUT necessary to meet Class C and D requirements from a given AC line voltage. The goal of designing a buck PFC for highest efficiency, while passing EN61000-3-2, Class D is verified with a 300W dual interleaved boundary conduction mode buck PFC converter.
Driving HB-LEDs in High-Power Industrial Lighting Fixtures
High-power, industrial Light Emitting Diode (LED) fixtures use series-parallel strings of High Brightness (HB) LEDs to produce superior lighting fixtures compared to traditional, “ballast-based” systems. HB-LEDs are configured in series or series-parallel strings and require Constant-Current, Constant-Voltage (CC-CV) power supplies typically operating within the range of 50W-200W. Voluntary and mandated industry requirements such as the need for Power Factor Correction (PFC), extended universal input voltage range, high efficiency, current accuracy, load control and dimming are all met with the usual challenges of reducing cost, size and design complexity. This paper will address some of the specific challenges designers face when considering power supply design solutions for these unique types of LED lighting applications.
LLC Resonant Converter: Design Issues and Solutions
Recently, the LLC resonant converter has drawn a lot of attention due to its advantages over the conventional series resonant converter and parallel resonant converter: narrow frequency variation over wide load variation and Zero Voltage Switching (ZVS) of the switches for entire load range. However, there still remain several technical issues that make the design and optimization complicated, which prevents wider adoption of this topology in various applications. This paper highlights critical design issues of the LLC resonant converter and discusses potential solutions to solve these design issues.
Evolution in Packaging for Optimum Efficiency and Size in Low Voltage DC-DC Applications
This paper focuses on the advantages of co-packaging two Power MOSFET die along with a gate driver IC die to form a low voltage, high current (60A) Multi-Chip module (MCM) synchronous buck power stage. It also provides a brief overview of the Low Voltage (< 30V) MCM evolution along with a discussion on why further advancements in packaging technologies are required to further improve performance. Dedicated sections will cover: package optimization, MOSFET optimization, and matching and optimizing the gate driver to the Power MOSFETs. Subsections will cover: controlling over-shoots and ringing, dead-time optimization, on-chip zero cross detect circuitry for accurate diode emulation, incorporating module fault features, and realizing advanced features such as accurate module temperature sensing.
Improve Flyback Design Performance with a Rapid Iteration Approach
Capable design software enables an engineer to optimize a circuit by comparing the performance of many different design alternatives in a short time. A flyback converter is used as an example to illustrate how control response can be improved through rapid iteration, examining the loop gain that results from component-value changes much faster than is possible by most other design methods. The starting point is a single-output off-line flyback converter designed automatically by Fairchild’s on-line design tool “Power Supply WebDesigner” (PSW) to meet a given specification. Control-loop compensation is explained briefly, then a sequence of design changes is made to improve efficiency and achieve the desired control response.
Agenda
| 8:00am – 9:00am | Registration and Continental Breakfast |
| 9:00am – 12:00pm | Seminar |
| 12:00pm – 1:00pm | Lunch |
| 1:00pm – 5:00pm | Seminar |
The registration fee of $75.00 provides you with the full day seminar, complimentary lunch and the complete set of presentation materials and supporting data. Click here to register.