Engineers can simplify high-temperature automotive designs while helping improve signal isolation and in-vehicle network performance, the manufacturer said.
DALLAS—Texas Instruments (TI) recently introduced what is reported to be the industry’s first digital isolator that is qualified to the Grade 0 ambient operating temperature specification of the Automotive Electronics Council (AEC)-Q100 standard. The ISO7741E-Q1 offers a 1.5-kVRMS working voltage and supports temperatures up to the Grade 0 maximum of 150°C, according to a release from TI.
Texas Instruments said in the release that the new isolator enables engineers to better protect low-voltage circuitry from high-voltage events in hybrid electric vehicle (HEV) and electric vehicle (EV) systems and avoid having to design-in cooling systems to reduce temperatures to below 125°C—the maximum temperature Grade 1-qualified integrated circuits (ICs) can support.
In addition, when implementing controller area network flexible data rate (CAN FD) communications in system designs, engineers can increase in-vehicle network (IVN) signal protection and reach by using the ISO7741E-Q1 with the new TCAN1044EV-Q1 Grade 0 CAN FD transceiver, the company said in the release.
Grade 0-qualified ICs meet the requirements of the AEC-Q100’s highest temperature grade (-40°C to 150°C) and are designed to help engineers simplify design of HEV/EV systems in harsh environments, such as 48-V HEVs, where the co-existence of internal combustion engines and battery systems can heat the air around ICs beyond 125°C. With reliable performance up to 150°C, TI’s new Grade 0 devices, the ISO7741E-Q1 and the TCAN1044EV-Q1, can be placed in high-temperature areas of HEV/EV systems without increasing bill of materials or design complexity, TI said.
The ISO7741E-Q1 uses TI’s capacitive isolation technology to provide the industry’s highest working voltage of 1.5 kVRMS and an isolation voltage of 5 kVRMS, enabling engineers to achieve more reliable operation of HEV/EV powertrain and HVAC systems that require signal transmission across an isolation barrier, such as starter generators, cooling fans, and traction inverters. The device is said to provide additional system-level protection in harsh automotive environments due to its high typical common-mode transient immunity of ±100 kV/µs and a ±8-kV International Electrotechnical Commission (IEC) 61000-4-2 contact discharge protection.
By combining the ISO7741E-Q1 and the TCAN1044EV-Q1 in CAN FD bus designs, engineers can meet the International Organization for Standardization (ISO) 11898-2:2016 timing standard for high-speed automotive communications, allowing for extended reach and reliability of signals across IVNs without diminishing data rates, according to TI.
Texas Instruments (www.ti.com) engineers, manufactures, tests, and sells analog and embedded semiconductor chips. The company’s products are at work in virtually every type of electronic system, from connected cars and intelligent homes to self-monitoring health devices and automated factories.
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