TI’s Grade 0 Digital Isolators For Automotive HEV/EV System Protection

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Helps simplify high-temperature automotive design and improve signal isolation for better in-vehicle network performance

Texas Instruments (TI) has introduced a digital isolator that meets the Grade 0 ambient operating temperature specification of the Automotive Electronics Council (AEC)-Q100 standard. The ISO7741E-Q1 features 1.5-kVRMS working voltage and supports high temperatures of up to 150 degrees Celsius.

Additionally, engineers can enhance in-vehicle network (IVN) signal protection and reach by using this IC along with the TCAN1044EV-Q1 Grade 0 CAN FD transceiver when implementing Controller Area Network Flexible Data Rate (CAN FD) communications in system designs.

High isolation voltage and discharge protection

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The ISO7741E-Q1 provides a high working voltage of 1.5 kVRMS and an isolation voltage of 5 kVRMS. This helps engineers to achieve reliable operation of HEV/EV powertrain and HVAC systems that require signal transmission such as starter generators, cooling fans and traction inverters.

This device also provides 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.

High device temperature simplifies design

These ICs meet AEC-Q100’s high-temperature standards (-40 degrees Celsius to 150 degrees Celsius) and allows engineers simplify the 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 (beyond 125 degrees Celsius) that is around the IC.

Fast automotive communications

By combining the ISO7741E-Q1 and the TCAN1044EV-Q1 in CAN FD bus designs, engineers can meet effectively meet the timing standard for high-speed automotive communications, thus allowing for extended reach and reliability of signals across IVNs without diminishing the data rates.

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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 designing in cooling systems with temperatures below 125°C.

Availability

The ISO7741E-Q1 Grade 0 digital isolator is available now from TI and authorized distributors in a 10.3-mm-by-7.5-mm, 16-pin small-outline integrated circuit (SOIC). Preproduction TCAN1044EV-Q1 Grade 0 CAN FD transceivers are available now, only from TI, in 4.9-mm-by-3.91-mm, 8-pin SOIC packages.


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