TPS4H160-Q1 Smart High-Side Switch Texas Instruments TPS4H160-Q1 Smart High-Side Switch is fully protected quad-channel smart high-side switch with four integrated 160mΩ NMOS power FETs. Full diagnostics and high-accuracy current sense enable intelligent control of the load. An external adjustable current limit improves the reliability of the whole system by limiting the inrush or overload current. Typical applications include multichannel LED drivers, high-side switches, high-side relays, bulb drivers, solenoid drivers and PLC digital output drivers.