Texas Instruments TPS25947 | Demoboard TIDA-010239

Description

The TPS25947xx family of eFuses is a highly integrated circuit protection and power management solution in a small package. The devices provide multiple protection modes using very few external components and are a robust defense against overloads, short-circuits, voltage surges, reverse polarity and excessive inrush current. With integrated back-to-back FETs, reverse current flow from output to input is blocked at all times, making the devices well suited for power MUX/ORing applications as well as systems which need load side energy hold up storage in case input power supply fails. The devices use linear ORing based scheme to ensure almost zero DC reverse current and emulate ideal diode behavior with minimum forward voltage drop and power dissipation.Output slew rate and inrush current can be adjusted using a single external capacitor. Loads are protected from input overvoltage conditions either by clamping the output to a safe fixed maximum voltage (pin selectable), or by cutting off the output if input exceeds an adjustable overvoltage threshold. The devices respond to output overload by actively limiting the current or breaking the circuit. The output current limit threshold as well as the transient overcurrent blanking timer are user adjustable. The current limit control pin also functions as an analog load current monitor.The devices are available in a 2-mm × 2-mm, 10-pin HotRod QFN package for improved thermal performance and reduced system footprint.The devices are characterized for operation over a junction temperature range of –40°C to +125°C.

Features

Wide operating input voltage range: 2.7 V to 23 V28-V absolute maximumWithstands negative voltages up to –15 VIntegrated back-to-back FETs with low on-resistance: RON = 28.3 mΩ (typ.)Ideal diode operation with true reverse current blockingFast overvoltage protectionOvervoltage clamp (OVC) with pin-selectable threshold (3.8 V, 5.7 V, 13.8 V) and 5-µs (typ.) response time ORAdjustable overvoltage lockout (OVLO) with 1.2-µs (typ.) response timeOvercurrent protection with load current monitor output (ILM)Active current limit OR circuit-breaker optionsAdjustable threshold (ILIM) 0.5 A–6 A±10% accuracy for ILIM > 1 AAdjustable transient blanking timer (ITIMER) to allow peak currents up to 2 × ILIMOutput load current monitor accuracy: ±6% (IOUT ≥ 1 A)Fast-trip response for short-circuit protection500-ns (typ.) response timeAdjustable (2 × ILIM) and fixed thresholdsActive high enable input with adjustable undervoltage lockout threshold (UVLO)Adjustable output slew rate control (dVdt)Overtemperature protectionDigital outputsPriority power MUX control (AUXOFF) and fault indication (FLT) orPower Good indication (PG) with adjustable threshold (PGTH)UL 2367 recognitionFile No. E339631RILM ≥ 750 ΩIEC 62368-1 CB certifiedSmall footprint: QFN 2 mm × 2 mm, 0.45-mm pitch

Typical applications

• Power MUX/ORing
• Patient monitors
• Adapter input protection
• Enterprise storage – RAID/HBA/SAN/eSSD
• Server, PC motherboard, and add-on cards
• USB PD protection – PC, notebook, monitors, docks

More information

• Datasheet
• IC product information