30 PRODUCT UPDATE Issue 1 2024 Power Electronics Europe www.power-mag.com EPC release three laser driver boards for Advanced Automotive Autonomy EPC introduces three evaluation boards - EPC9179, EPC9181, and EPC9180 - featuring pulse current laser drivers of 75 A, 125 A, and 231 A , showcasing EPC’s AEC-Q101 GaN FETs. These FETs; EPC2252, EPC2204A, and EPC2218A are 30% smaller and more cost-effective than their predecessors. Designed for both long and short-range automotive lidar systems, these boards expedite solution evaluation with varied input and output options. All boards share identical functionality, differing only in peak current and pulse width. Utilizing a resonant discharge power stage, they employ a groundreferenced GaN FET driven by LMG1020 gate driver. The GaN FET\’s ultrafast switching enables rapid discharge of a charged capacitor through the load\’s stray inductance, enabling peak discharge currents of tens to hundreds of amps within nanoseconds. The printed circuit board is designed to minimize power loops and common source inductance while offering mounting flexibility for laser diodes or alternative loads. To enhance user-friendliness, all boards ship with EPC9989 interposer PCBs, featuring various footprints to accommodate a variety of laser diodes or other loads. Customers can choose one that meets their needs to evaluate the GaN solutions. The EPC9179/81/80 boards are designed to be triggered from 3.3V logic or differential logic signals such as LVDS. For single-ended inputs, the boards can operate with input voltages down to 2.5 V or 1.8 V with a simple modification. Designing an automotive lidar system is complex, and finding a reliable solution is challenging. The purpose of these evaluation boards is to simplify the evaluation of powerful GaN-based lidar drivers that switch faster and deliver higher pulse current than other semiconductor solutions. For technical details, EPC offers full schematics, bill of materials (BOM), PCB layout files, and a quick start guide on EPC’s website. “To meet the growing demand for automotive lidar, these cost-effective boards, featuring our latest AEC products, streamline evaluation, reducing timeto-market with exceptional switching performance,” said Alex Lidow, CEO, and co-founder of EPC. Visit: epc-co.com Innoscience Technology releases low voltage HEMTs in FCQFN packaging he new FCQFN devices are easy to mount on PCBs using standard assembly equipment and processes, says the company, although all discrete devices are also still offered in wafer scale packages for module users. The 40V-rated FCQFN devices are available with an on-resistance value of 4.3mΩ and the chip size is 3.0 x 4.0mm. The 100V HEMTs are offered with RDS(on) of 2.8mΩ and dimensions of 3.0 x 5.0mm and a 1.8mΩ model which has a chip size of 4.0 x 6.0mm. The 150V-rated parts measure 4.0 x 6.0mm and are available with 3.9mΩ and 7.0mΩ RDS(on). The 1.8mΩ 100V HEMTs are packaged in FCQFN 4.0 x 6.0mm and is therefore pin-for-pin compatible with the 3.9mΩ and 7.0mΩ 150V parts. The 40V parts, using Innoscience’s latest GaN processes, achieve industryleading performance, claims the company, with best in class FOM (figure of merit) values for Qgg*Ron and Idss*Ron. Low drain and gate leakage currents enable the HEMTs to be used in mobile markets and direct battery-connected applications as well as USB Type C buck-boost converters in laptops. Innoscience says that its latest generation process enables it to maintain very tight control of the epitaxy, resulting in a very uniform threshold voltage and on-resistance, leading to a very high wafer yield. 100V HEMT devices are suitable for DC/DC conversion at power levels of up to 2kW and can achieve up to 8kW when used in parallel configuration. The 150V models are suitable for industrial applications, including solar installations. They have been designed to be rugged so they do not need the industry-standard 80% derating to be applied (i.e. they are rated at 100% of their voltage), explains Innoscience. All of the new HEMTs have been tested to and exceeded JEDEC and the GaN-specific JEP 180 standards. www.innoscience.com The PKM7200W series has a wide input range of 16 to 160V (185V/second), which is suitable for rail applications around the world, says the company. Modules provide 150W continuous output power and 12, 24 or 54V DC fully regulated single outputs in a 62 x 40 x 13mm (2.44 x 1.57 x 0.51 inch) case. Efficiency is up to 89% and the modules feature 4kV DC isolation, meeting the requirements of EN 50155 for rail, as well as IEC/EN/UL 62368-1 for IT and audio/visual applications. The PKM7200W series has a VBUS pin. This input-referenced connection is boosted to around 100V, irrespective of the input voltage. This can be used to charge a user-supplied capacitor which the DC/DC switches in when the input power is interrupted. This feature enables long hold-up time with a relatively small capacitor, to meet the 10 to 30ms requirements of the rail standard EN 50155. The products comply with the rail fire safety standard EN 45545-2 and have been qualified to EN 61373 and the IEC 60068 series of standards for environmental testing. EN 50121-3-2 for EMC in rail applications is met, as well as EN 55011 and the EN 61000-4 series of standards for EM immunity. EMI conducted emissions meet EN 55032, CISPR 32 and FCC part 15J ‘Class B’ with an external filter. The PKM7200W series operates from -40 to 100°C baseplate temperature PKM7200W series of DC/DC converters meet worldwide rail applications
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