TPSI3100-Q1 Isolated Switch Driver Texas Instruments TPSI3100-Q1 Isolated Switch Driver is a fully integrated isolated switch driver, which, when combined with an external power switch, forms a wholly isolated solid-state relay solution. With a gate drive voltage of 15.8V and 1.5/2.5A peak source/sink current, many power switches can be used to meet many application needs. The TPSI3100-Q1 generates its secondary bias supply from power received on its primary side, so no isolated secondary supply bias is required. The TPSI3100-Q1 provides additional power via the nominal 5V rail (VDDM) for auxiliary circuits to perform various functions such as current and voltage monitoring or remote temperature detection. The TPSI3100-Q1 isolation is extremely robust, with much higher reliability, lower power consumption, and increased temperature ranges than those found using traditional mechanical relays and optocouplers.