The TPS7H2140-SEP device is a eFuse, with internal charge pump and quad-channel integrated NMOS power FETs. Full diagnostics and high-accuracy current-sense features enable intelligent control of the load. The adjustable current-limit function greatly improves the reliability of whole system. The device includes diagnostic reporting, which includes an global open-drain digital output and the current-sense analog output.

High-accuracy current sense makes the diagnostics more accurate without further calibration. One integrated current mirror can source 1 / K_CS of the load current. The mirrored current flows into the CS-pin resistor to become a voltage signal. K_CS is a constant value (300) across temperature and supply voltage. A wide linear region from 0 V to 4 V allows a better real-time load-current monitoring. The CS pin can also report a fault with pullup voltage of V_{CS_FAULT}.

The external high-accuracy current limit allows setting the current-limit value by applications. When overcurrent occurs, the device improves system reliability by clamping the inrush current effectively. The device can also save system area by reducing the size of PCB traces and connectors, and the capacity of the preceding power stage. Additional, the device also implements an internal current limit (I_{CL_INTERNAL}) with a fixed value, between 8 to 14 A.

For inductive loads (relays, solenoids, valves), the device implements an active clamp between drain and source to protect itself. During the inductive switching-off cycle, both the energy of the power supply and the load are dissipated on the high-side switch. The device also optimizes the switching-off slew rate when the clamp is active, which helps the system design by keeping the effects of transient power and EMI to a minimum.

The TPS7H2140-SEP device is a eFuse for a wide variety of resistive, inductive, and capacitive loads, including: relays, solenoids, heaters, and sub-modules.