Quad-Channel Digital Isolator Endures Up to 5700 V RMS
Infineon Technologies is upgrading its ISOFACE series of quad-channel digital isolators to usher in more robust, efficient, and precise data communication in automotive- and industrial-grade systems.
The new digital isolator lineup includes the 4DIRx4xxHA family targeted at the onboard chargers (OBCs), battery management systems (BMS), inverters, and motor-control systems in EVs. It’s qualified to AEC-Q100 standards. The other ISOFACE family, 4DIRx4xxH, is fully qualified to JEDEC standard. It’s designed for industrial-grade systems such as renewables, servers, telecom, switch-mode power supplies (SMPS), industrial automation, as well as isolated serial peripheral interface (SPI).
The chips are housed in a wide-body PG-DSO-16 package with four data channels, providing enhanced isolation and ensuring reliable data communications in harsh conditions. The digital isolators are based on Infineon’s coreless transformer (CT) technology to gain robustness against system noise (common-mode transient immunity of minimum 100 kV/µs) and withstands up to 5700-V RMS isolation voltage.
The quad-channel digital isolators offer an operating supply voltage range from 2.7 to 6.5 V. Even with the wide supply-voltage range, their low current consumption remains efficient, peaking at 1.6 mA per channel when operating at high speeds up to 1 MB/s with a 3.3-V supply voltage. The new chips are also highly durable, with the ability to withstand ambient temperatures as low as −40°C and as high as 125°C.
The digital isolators are adept at minimizing signal noise over that supply-voltage range, and they can handle voltage transients, electromagnetic interference (EMI), electrostatic discharge (ESD), and other electrical disturbances. Short propagation delay and minimal channel-to-channel mismatch give them precise timing performance that leads to high-power-density designs and safeguards data.