TPS26631PWPR
TPS26631PWPR - 60V 6A eFuse HTSSOP-20 | Texas Instruments
The Texas Instruments TPS26631PWPR is a 4.5-V to 60-V, 31mΩ, 0.6-A to 6-A industrial eFuse (electronic fuse) with integrated power-limiting and surge protection, packaged in a 20-pin HTSSOP (PWP) with PowerPAD. The device integrates a 31 mΩ N-channel hot-swap FET, supports reverse polarity and reverse current blocking with an external N-FET, and offers ±7% accurate adjustable current limit from 0.6 A to 6 A. Absolute maximum input rating is 67 V, providing margin above the 60-V nominal operating range.
An electronic fuse (eFuse) is a semiconductor protection device that replaces legacy mechanical fuses and PTC resettable devices. Compared with discrete hot-swap designs (MOSFET + sense resistor + op-amp + comparator), an integrated eFuse combines inrush limiting, current limit, over-voltage clamp, thermal fold-back and fault output in a single IC. eFuse devices sit in the protection hierarchy between TVS/TVS-diode (transient suppressor) and discrete hot-swap controllers, and they are classified within power management ICs for industrial systems. They are widely adopted in 24-V factory automation backplanes, 48-V telecom and battery-powered industrial loads where hot-plug, surge and reverse-polarity events are routine.
Key features of the TPS26631PWPR include programmable output power limiting (dV/dT controlled turn-on), integrated surge protection, fault output flag, thermal shutdown, and ±7% ILIM accuracy over temperature. The HTSSOP-20 PowerPAD provides a low thermal resistance path, enabling continuous 6-A operation on moderate copper area. Power limiting lets the device ride through large transient overloads without nuisance tripping while still protecting upstream supplies.
The TPS26631PWPR uses TI's HotSwap architecture with an integrated charge pump gate driver for the internal N-FET. The reference design supports either independent mode (ILIM resistor to GND) or closed-loop power limiting via the PLIM resistor. A fault timer programs the retry/delay behavior after an OCP/OVP event, and the IMON pin provides analog load-current monitoring for system telemetry.
Typical applications include 24-V industrial PLC I/O protection, factory-automation sensor and actuator rails, 48-V telecom rectifier secondary protection, motor-driver pre-regulation, and battery-powered industrial equipment with hot-plug battery packs. The wide 4.5-V to 60-V operating window also suits solar and renewable energy harvesters.
Designers should size upstream capacitance so that inrush (dV/dT programmed by CDEV) does not exceed the current-limit threshold at power-on, and they should connect the PowerPAD to a sufficient copper pour to keep junction rise below 100 °C at 6-A continuous load.
This page synthesizes distributor pricing, drop-in alternatives, application reference designs, and PCB/thermal design notes not collected in any single source - the manufacturer datasheet remains the authoritative reference for final design.
USD $2.72
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