Texas Instruments has introduced a new portfolio of solid-state relays, including automotive-qualified isolated drivers and switches, that deliver industry-leading reliability to help make electric vehicles (EVs) safer. These new isolated solid-state relays also provide the smallest solution size while reducing the bill-of-materials (BOM) cost of powertrain and 800-V battery-management systems. These devices are the first in a new solid-state relays portfolio that will also include ICs designed for high-voltage industrial applications.
The TPSI3050-Q1 isolated switch driver with an integrated 10-V gate supply and the TPSI2140-Q1 1,400-V, 50-mA isolated switch both integrate power and signal isolation across a single barrier using a unique approach that improves reliability, while significantly reducing solution size and cost compared to existing electromechanical relays and solid-state photorelays. These new solid-state relays can disconnect and connect loads through a single isolation barrier in microseconds to enable safer operation of high-voltage automotive systems.
The TPSI3050-Q1 offers reinforced isolation up to 5 kVRMS and the TPSI2140-Q1 offers basic isolation up to 3.75 kVRMS, enabling it to achieve more than four times higher time-dependent dielectric breakdown reliability than solid-state photorelays. Designed for high-voltage measurements and insulation monitoring, the TPSI2140-Q1 works with a battery-pack monitor such as the BQ79631-Q1 and the TPSI2140-Q1 enables the use of <1-MΩ resistors and withstands over 300% more avalanche current than traditional photorelays to help enable safer human-system interaction.
Availability and Pricing
The TPSI3050-Q1 and TPSI2140-Q1 are available in pre-production, 1,000-unit quantities at US$1.99 and US$2.75, respectively.