Parafoudres
Produits (3)
KTS1681AEUZ-TR - 4A OVP Load Switch with +100V Surge | Kinetic
The Kinetic Technologies KTS1681AEUZ-TR is a 4 A overvoltage-protected load switch with integrated 28 mOhm (typical) MOSFET and +100 V surge protection, housed in a 12-ball WLCSP package (1.7 x 1.21 mm). It is engineered to actively shield downstream low-voltage systems from voltage supply faults up to +28 VDC and transient surges as high as +100 V at the input. A load switch, in this category, is a power-distribution switch that sits between an upstream supply rail and downstream electronics, controlling power-up, power-down, and fault isolation. The KTS1681A family specifically addresses overvoltage (OVP) events - it occupies the niche between discrete TVS diodes plus MOSFETs and full hot-swap controllers, integrating an internal clamp, OVP comparator, and power MOSFET into a single IC. It belongs to the broader class of power-management ICs (PMICs) and is functionally adjacent to surge suppression and eFuse devices. Key differentiating features include an adjustable overvoltage trip threshold, a sense output for load current monitoring, an internal clamp that absorbs surges to +100 V without external TVS components, ultra-low 28 mOhm on-resistance to minimise conduction losses, and a 12-WLCSP form factor that is the smallest footprint in its class. The internal clamp eliminates the need for an external TVS diode in most 28 V hot-plug and automotive use cases. The device architecture combines a back-to-back MOSFET configuration for true bidirectional blocking, an internal clamp for surge absorption, and an OVP comparator that triggers switch turn-off when VIN exceeds the programmed threshold. The sense output provides an analog current-mirror signal proportional to load current, simplifying accurate load-current telemetry without a series sense resistor. Typical applications include USB Type-C VBUS protection, smartphone and tablet charging ports, hot-plug circuits on multi-rail systems, and any point-of-load where 5 V/9 V/12 V/20 V rails may be exposed to faulty or miswired supplies. The WLCSP-12 footprint is preferred over larger QFN packages when board area is at a premium. When designing in this part, choose the OVP threshold carefully so that transient overshoot from normal hot-plug events does not falsely trigger the protection. Adequate input decoupling is required to keep the internal clamp from sustained clamping operation, which can raise junction temperature beyond the device rating. This page synthesises distributor pricing, WLCSP-12 pin configuration, and matching same-family load switches that share the same footprint - information not consolidated on any single distributor page.
MAX14571EUD/V+ - Adj. OVP/OCP ±40V, 4.2A, 14-TSSOP-EP | Analog Devices
The Analog Devices MAX14571EUD/V+ (formerly Maxim Integrated) is an adjustable overvoltage-and-overcurrent protection IC with 100 mΩ (typ) internal MOSFET, ±40 V input fault tolerance, and programmable current limit up to 4.2 A, housed in a 14-pin TSSOP-EP package. It supports an operating input range of 4.5 V to 36 V (OVLO adjustable up to 33 V), making it ideal for 12 V/24 V industrial bus systems. An overvoltage protection (OVP) IC is a hot-swap / power-distribution switch that disconnects a downstream load from the input rail when the input exceeds a programmable threshold or when the load current exceeds a programmable limit. OVP ICs sit in the system hierarchy between discrete protection (TVS, fuse) and full PMICs: they add active, re-settable behaviour without the size or cost of a complete PMU, and they protect downstream DC-DC converters, batteries and microcontrollers from inductive transients and load-dump events. Key features include: ±40 V positive/negative input fault tolerance, 100 mΩ (typ) internal RON FET, programmable OVLO (max 33 V) and UVLO thresholds, programmable current limit up to 4.2 A with 20.7 ms (typ) blanking time, automatic retry behaviour, reverse-current blocking, and thermal-shutdown protection. The integrated MOSFET eliminates the need for an external power switch in most 4.2 A paths. The MAX14571 uses a back-to-back MOSFET topology that blocks both forward and reverse current flow when disabled. The blanking-time circuit masks inrush transients during startup so the current limiter does not false-trip on capacitive loads. The autoretry behaviour restarts the output after the retry period, which simplifies recovery from transient faults. Typical applications include USB-C PD and 5 V/12 V/24 V industrial rail protection, PLC I/O protection, load-dump protection in 24 V automotive systems, battery hot-swap, and protection of downstream point-of-load (POL) converters and microcontrollers. The MAX14571EUD/V+ variant is the automotive-grade (-40°C to +125°C) over the base MAX14571EUD+; for latched-off behaviour use MAX14572; for continuous-current limiting only use MAX14573. All three share the same 14-TSSOP-EP pinout. This page synthesizes distributor pricing (as of 2026-10-20), drop-in TSSOP-EP alternatives, and practical design notes that are not reproduced in the manufacturer datasheet.
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.