The new portfolio can help make electric cars safer, while reducing the size of the solution by up to 90% and the price by up to 50%

Bangalore (May 10, 2022) – Based on more than two decades of experience in developing new technologies for the production of insulation and integrated circuits (ICs) for high voltage systems, Texas Instruments (TI) (Nasdaq: TXN) today presented a new portfolio of solid state relays, including insulated drivers and switches, qualified by the industry to provide industry-leading reliability to help make safer electric vehicles (EVs) safer. The new insulated solid state relays also provide the smallest solution size, while reducing the cost of specifications (BOM) of the drive unit and 800 V battery management systems. For more information, see ti.com/ssr-pr.

The TPSI3050-Q1 insulated switch with integrated 10-V port power supply and the TPSI2140-Q1 1400-V, 50-mA insulated switch integrate power and signal isolation across a barrier using a unique approach that improves reliability while significantly reducing size and cost of the solution compared to existing electromechanical relays and solid state photorelays. The devices are the first in the new portfolio of solid state relays, which will also include integrated circuits designed for high voltage industrial applications. To learn more about the benefits of solid state relays, read the technical article “How to achieve higher reliable insulation and a smaller solution size with solid state relays”.

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“High voltage systems are becoming more common, especially with the increasing adoption of EV. At TI, we are strongly focused on finding new ways for system designers to solve complex insulation challenges, such as ensuring reliable and safe vehicle operation as the industry shifts to 800-V batteries, while reducing the size and cost of the solution. said Troy Coleman, vice president and general manager of Power Switches, Interface and Lighting at Texas Instruments. “By integrating more functionality into our insulation technology, our new solid state relays allow engineers to reduce the size, cost and complexity of high voltage power supplies while maintaining the safety of the next generation of automotive and industrial systems.

Achieve higher system reliability with integrated insulation technology

The new solid state relays can disconnect and connect loads through a single insulation barrier in microseconds – compared to milliseconds for electromechanical relays – to allow safer operation of high-voltage automotive systems. The TPSI3050-Q1, which offers reinforced insulation up to 5 kVRMS, also provides a service life that is 10 times longer than electromechanical relays, which can deteriorate over time. In addition, the TPSI2140-Q1 offers basic insulation of up to 3.75 kVRMS, which allows it to achieve more than four times higher time-dependent dielectric breakdown reliability compared to solid-state photorelays.

Reduce the size and cost of the system with integrated power and signal isolation

Solid state relays integrate power and signal transmission into a single chip, while eliminating at least three components of their designs, significantly reducing the size of the solution while reducing specification costs by as much as 50%. The TPSI3050-Q1 reduces the size of the solution by up to 90% compared to mechanical relay solutions by integrating the functions of isolated power supply, digital isolator and gate driver. TPSI2140-Q1 reduces the size of the solution by up to 50% compared to traditional solid state photorelay solutions by integrating a signal field-effect transistor and resistors and eliminating the need for a reed relay.

Improve the safety of 800-V EV battery management systems

Designed for high voltage measurements and insulation monitoring, the TPSI2140-Q1 works with a battery monitor such as the BQ79631-Q1 to detect insulation faults in 800 V battery management systems faster and more accurately than solid state photorelays. The TPSI2140-Q1 allows the use of <1-MΩ resistors and withstands over 300% more avalanche current than traditional photorelays to help ensure safer human-system interaction.

Package, availability and price

The TPSI3050-Q1 and TPSI2140-Q1 are available in pre-production quantities of 1,000 units on TI.com alone for $ 1.99 and $ 2.75, respectively. Engineers can evaluate these products with the TPSI3050Q1EVM and TPSI2140Q1EVM evaluation modules available on TI.com for $ 49 each.

Insulation products that are different in design

Solid state relays are the latest addition to TI’s growing portfolio of signal isolation, power or both. Other new products include the UCC14240-Q1 isolated DC / DC power supply module, which uses TI’s own integrated transformer technology to enable high power density, low electromagnetic interference and high reliability to improve EV driving range, and AMC23C12, the industry’s first reinforced insulated comparator. The AMC23C12 combines the functions of standard galvanic isolation barrier comparators while reducing solution size by 50% and providing ultra-fast isolated bi-directional overcurrent and overvoltage detection in less than 400 ns. For more information, see

TI drives isolation technology forward with new solid-state relays that provide industry-leading reliability

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