New Industry Products

TI and EPC Partner on 80-V Half-Bridge GaN FET Module

March 12, 2015 by Jeff Shepard

Texas Instruments, Inc. (TI) today introduced the industry's first 80-V, 10-A integrated gallium-nitride (GaN) FET power-stage prototype, which consists of a high-frequency driver and two GaN FETs in a half-bridge configuration – all in an easy-to-design quad flat no-leads (QFN) package. TI has an arranged supplier agreement with Efficient Power Conversion Corp. (EPC) for GaN FETs – the LMG5200 is a combination of TI's optimized driver and EPC's GaN combined in a high performance package to maximize performance and efficiency.

The new LMG5200 GaN FET power stage will help accelerate market adoption of next-generation GaN power-conversion solutions that provide increased power density and efficiency in space-constrained, high-frequency industrial and telecom applications. The power stage will be highlighted as part of a 48-V digital power demonstration at the Applied Power Electronics Conference (APEC), in Charlotte, North Carolina, March 16-18.

TI has spent significant time developing system level solutions which includes several magnetic components. The first is the TI buck converter EVM that was designed up to 5MHz (see below). The second is a 48V to POL demo that will be shown at APEC. As of this writing, TI was still considering how to identify the full BOM for this demo in some capacity.

“One of the biggest barriers to GaN-based power design has been the uncertainties around driving GaN FETs and the resulting parasitics due to packaging and design layout,” said Steve Lambouses, vice president of TI’s High-Voltage Power Solutions business. “We help power designers realize the full power potential of GaN technology by offering them a complete, reliable power-conversion ecosystem of optimized integrated modules, drivers and high-frequency controllers in advanced, easy-to-design packaging.”

Typically, designers who use GaN FETs that switch at high frequencies must be careful with board layout to avoid ringing and electromagnetic interference (EMI). TI’s LMG5200 dual 80-V power stage prototype significantly eases this issue while increasing power-stage efficiency by reducing packaging parasitic inductances in the critical gate-drive loop. The LMG5200 features advanced multichip packaging technology and is optimized to support power-conversion topologies with frequencies up to 5 MHz.

The easy-to-use 6-mm by 8-mm QFN package requires no underfill, which significantly simplifies manufacturing. The reduced footprint solidifies the value of GaN technology and will help increase adoption of GaN power designs in many new applications, ranging from new high-frequency wireless charging applications to 48-V telecom and industrial designs.

Key features and benefits of the LMG5200: Highest power density. The first integrated 80-V half-bridge GaN power stage delivers 25 percent lower power losses compared to silicon-based designs, enabling single-stage conversion. Comprehensive GaN-specific quality program for reliability. Lowest packaging parasitic inductance in the critical gate-drive loop increases power-stage efficiency and enhances dV/dt immunity while reducing EMI. Simplified layout and manufacturability. Easy-to-use QFN package eliminates the need for underfill to address high-voltage spacing concerns, improving board manufacturability and reducing cost.

Prototype samples of the GaN power stage are available to purchase now in the TI Store. The LMG5200 is priced at US$50 each with a maximum purchase of 10 units. The LMG5200 EVM is available for US$299.