CISSOID - RHEA, a High Temperature Dual-Channel, 2Mbit/s Isolated Data Transceiver

The complete 4-channel data transmission requires one instance of CHT-RHEA on each side of the pulse transformers. CISSOID has already demonstrated the overall function at board-level, including the transformer on the full temperature range. The PCB demonstrator based on CISSOID components achieves a data rate of 2MBits/s, with transmission delays and jitter respectively lower than 100ns and 25ns over the full chain. The circuit architecture, the modulation scheme and the transformer design have been optimized to provide immunity to extreme dV/dt, as high as 50kV/µs.

The solution offers state-of-the-art digital signal isolation with substantial advantages over opto-couplers such as high reliability, lower-power, high immunity to dV/dt and operation in extreme temperature conditions. CHT-RHEA is a versatile component which is useful everywhere a digital signal has to be transmitted with galvanic isolation between two different common mode voltage domains under extreme temperatures. At conventional temperatures, RHEA will ensure outstanding reliability and life time of the system.

Applications include isolated gate drivers for IGBT, JFET and MOSFET power transistors, including Silicon Carbide (SiC) switches, industrial busses, isolated A-D converters and sensor interfaces, motor drives and battery management in industrial, aeronautics, railway and electric & hybrid vehicles.

RHEA integrated circuit will be used in CISSOID’s upcoming complete isolated gate driver technology called HADES™, for transmission of control and feedback signals across the low and high voltage domains.