Helping customers harness power delivered over a standard Ethernet cable, Texas Instruments announced a versatile IC controller and the industry's first Power-over-Ethernet plug-in power module that reduces design time and eases implementation of Ethernet-powered industrial and commercial devices such as WLAN access points, IP phones, security and point-of-sale systems. TI's TPS2375 controller builds upon the success of the TPS2370, introduced in 2003, to effectively manage discovery, classification and delivery of direct-current (DC) power to a powered device. The IC offers increased flexibility and performance as it manages the interface between the power source equipment (PSE) and a commercial or industrial powered device (PD), while providing necessary power management control and protection. The TPS2375 was created using TI's linear Bi-CMOS, silicon-on-insulator (LBC-SOI) process technology, which lets the controller withstand transients up to 100 V and operate over an industrial temperature range of -40C to 85C. The device also features 15-kV system-level electrostatic device (ESD) capability, adding unprecedented versatility to support extreme Power-over-Ethernet environments. In addition, the controller has an internal 0.6-ohm FET to minimize heat dissipation in the system. The controller further protects the powered device by implementing a 450-mA operating current limit, thermal shutdown and in-rush current limiting. The device utilizes a tiny external resistor to program in-rush current limit, enabling interoperability between a wide range of IEEE 802.3af-compliant and pre-802.3af "legacy" PSE systems. Texas Instruments Europe, 06270 Villeneuve-Loubet, France.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.