SLVAFU8 July 2024 TPSI2072-Q1 , TPSI2140-Q1 , TPSI3050 , TPSI3050-Q1 , TPSI3052 , TPSI3052-Q1 , TPSI3100 , TPSI3100-Q1
Traditionally, electromechanical relays and photo relays require an external resistor to control current flow and an external MOSFET to drive a load through either the coil or LED. Isolated switches and drivers eliminate the need for an external resistor and MOSFET by incorporating transistor based inputs, such as TTL or CMOS logic. As a result, isolated switches or drivers reduce overall BOM compared to other isolation technologies.
Figure 2-3 displays an electromechanical relay, photo relay, and isolated switch or driver (left to right).