EV car charger solution features V2G communication

12th January 2015

Siobhan O'Gorman

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Microsemi and STMicroelectronics have contributed to the development of an EV car charger solution targeted at IoT system designers. Featuring V2G (Vehicle-to-Grid) communication and support for a wide range of network and application protocols,Tatung's module for EV supply equipment utilises Microsemi’s Le87501 PLC line driver and ST’s ST2100 STreamPlug SoC. The solution, which is supported by the OpenV2G software stack, also utilises a new proprietary state machine, event-driven-based digital power controller.

Microsemi’s Le87501 is a single channel line driver, designed to work in HomePlug Alliance HPAV2 systems. When enabled, the operation can be set to full, 90% or 80% power. The device, which features a standby state that forces it into a long-term sleep mode, can drive a line impedance of 100Ω down to 12Ω through a proper transformer. Based on Microsemi’s proprietary high-speed, high-voltage bipolar process technology, the Le87501 PLC driver is claimed to offer significant performance and cost savings over currently used technologies.

Based on the ARM926EJ-S processor (up to 333MHz), ST’s STreamPlug ST2100 device is widely used in consumer HAN, industrial and smart grid applications, where high computation performance is required. The device features an MMU which allows virtual memory management, making it compliant with Linux OS. For debug operations, the SoC offers 16kB of data cache, 32kB of instruction cache, JTAG and ETM. To support hybrid networks utilising popular wired and wireless standards, including HomePlug AV and HomePlug Green PHY, the ST2100 STreamPlug combines a high-performance processing subsystem with PLC, security and peripheral features. The SoC also integrates a PLC modem and analogue front end.

This is the first collaboration between ST and Microsemi targeting IoT. According to IDC, the IoT market will generate global revenues of $8.9 trillion by 2020, growing at a CAGR of 7.9%.

“Microsemi’s high-performance line drivers, along with the STreamPlug SoC, provide a world-class IoT total solution, enabling faster development of innovative power management systems,” said Shahin Sadeghi, Director of Marketing and Applications, Microsemi.

“The ST2100-based platform was developed to enable industrial IoT applications,” commented Oleg Logvinov, Director Special Assignments, Industrial and Power Conversion Division, STMicroelectronics. “Its value to the market is being clearly demonstrated in its adoption by Microsemi and Tatung to address new applications and markets that include electrical vehicle charging and the smart home.”