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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftpsi2140-q1″>View Datasheet
Texas Instruments TPSI2140-Q1 Automotive Isolated Switch is an isolated solid-state relay (SSR) designed for high-voltage automotive and industrial applications. The TPSI2140-Q1 uses TI’s high-reliability capacitive isolation technology in combination with internal back-to-back MOSFETs to form a completely integrated solution requiring no secondary side power supply. The entire primary side of the device requires only 7.5mA of input current, enabling the user to drive both the VDD and EN pins from a single microcontroller GPIO and eliminating the need for an external low-side switch used in photo relay solutions. The user can also choose to connect the VDD pin to a system supply between 5V to 20V and drive the EN pin from a GPIO. The EN pin is fail-safe, preventing any possibility of back powering the VDD supply.
The secondary side consists of back-to-back MOSFETs with a standoff voltage of ±1.4kV from S1 to S2. The TPSI2140-Q1 MOSFET’s avalanche robustness and thermally conscious package design allow it to survive system-level High Potential (HiPot) screening and DC fast charger surge currents of up to 2mA without requiring external components. The TPSI2140T-Q1 version of the device is equipped with TI’s Thermal Avalanche Protection (TAP) feature allowing it to support avalanche currents up to 5mA.
