Product details

FET Internal Ron (Typ) (mOhm) 28 Vin (Min) (V) 2.7 Vin (Max) (V) 23 Vabsmax_cont (V) 28 Current limit (Min) (A) 0.5 Current limit (Max) (A) 6 Overcurrent response Circuit breaker, Current limiting Fault response Auto-retry, Latch-off UL recognition UL2367, IEC62368
FET Internal Ron (Typ) (mOhm) 28 Vin (Min) (V) 2.7 Vin (Max) (V) 23 Vabsmax_cont (V) 28 Current limit (Min) (A) 0.5 Current limit (Max) (A) 6 Overcurrent response Circuit breaker, Current limiting Fault response Auto-retry, Latch-off UL recognition UL2367, IEC62368
VQFN-HR (RPW) 10 4 mm² 2 x 2
  • Wide operating input voltage range: 2.7 V to 23 V
    • 28-V absolute maximum
    • Withstands negative voltages up to –15 V
  • Integrated back-to-back FETs with low on-resistance: RON = 28.3 mΩ (typ.)
  • Ideal diode operation with true reverse current blocking
  • Fast overvoltage protection
    • Overvoltage clamp (OVC) with pin-selectable threshold (3.8 V, 5.7 V, 13.8 V) and 5-µs (typ.) response time OR
    • Adjustable overvoltage lockout (OVLO) with 1.2-µs (typ.) response time
  • Overcurrent protection with load current monitor output (ILM)
    • Active current limit OR circuit-breaker options
    • Adjustable threshold (ILIM) 0.5 A–6 A
      • ±10% accuracy for ILIM > 1 A
    • Adjustable transient blanking timer (ITIMER) to allow peak currents up to 2 × ILIM
    • Output load current monitor accuracy: ±6% (IOUT ≥ 1 A)
  • Fast-trip response for short-circuit protection
    • 500-ns (typ.) response time
    • Adjustable (2 × ILIM) and fixed thresholds
  • Active high enable input with adjustable undervoltage lockout threshold (UVLO)
  • Adjustable output slew rate control (dVdt)
  • Overtemperature protection
  • Digital outputs
    • Priority power MUX control (AUXOFF) and fault indication (FLT) or
    • Power Good indication (PG) with adjustable threshold (PGTH)
  • UL 2367 recognition
    • File No. E339631
    • RILM ≥ 750 Ω
  • IEC 62368-1 CB certified
  • Small footprint: QFN 2 mm × 2 mm, 0.45-mm pitch
  • Wide operating input voltage range: 2.7 V to 23 V
    • 28-V absolute maximum
    • Withstands negative voltages up to –15 V
  • Integrated back-to-back FETs with low on-resistance: RON = 28.3 mΩ (typ.)
  • Ideal diode operation with true reverse current blocking
  • Fast overvoltage protection
    • Overvoltage clamp (OVC) with pin-selectable threshold (3.8 V, 5.7 V, 13.8 V) and 5-µs (typ.) response time OR
    • Adjustable overvoltage lockout (OVLO) with 1.2-µs (typ.) response time
  • Overcurrent protection with load current monitor output (ILM)
    • Active current limit OR circuit-breaker options
    • Adjustable threshold (ILIM) 0.5 A–6 A
      • ±10% accuracy for ILIM > 1 A
    • Adjustable transient blanking timer (ITIMER) to allow peak currents up to 2 × ILIM
    • Output load current monitor accuracy: ±6% (IOUT ≥ 1 A)
  • Fast-trip response for short-circuit protection
    • 500-ns (typ.) response time
    • Adjustable (2 × ILIM) and fixed thresholds
  • Active high enable input with adjustable undervoltage lockout threshold (UVLO)
  • Adjustable output slew rate control (dVdt)
  • Overtemperature protection
  • Digital outputs
    • Priority power MUX control (AUXOFF) and fault indication (FLT) or
    • Power Good indication (PG) with adjustable threshold (PGTH)
  • UL 2367 recognition
    • File No. E339631
    • RILM ≥ 750 Ω
  • IEC 62368-1 CB certified
  • Small footprint: QFN 2 mm × 2 mm, 0.45-mm pitch

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.

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.

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Technical documentation

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Type Title Date
* Data sheet TPS25947xx, 2.7-V–23-V, 5.5-A, 28-mΩ True Reverse Current Blocking eFuse with Input Reverse Polarity Protection datasheet (Rev. B) PDF | HTML 25 Mar 2022
Application note How eFuse Ensures Integrated FET Operation in Safe Operating Area PDF | HTML 07 Sep 2022
Application note Using an eFuse to Meet IEC62368-3 for USB 2.0 and USB 3.1 Power Sourcing Ports PDF | HTML 07 Feb 2022
Certificate TPS25947x UL2367 Certificate of Compliance E169910 19 Jan 2022
Certificate TPS25947x UL2367 Certificate of Compliance E339631 18 Jan 2022
Certificate TPS25947x CB Test Certificate IEC 62368-1 08 Dec 2021
Application note Basics of Power MUX (Rev. A) PDF | HTML 20 Oct 2020
Application note Fast Role Swap, Linear ORing with TPS25947 and LM73100 in USB-Type C Systems (Rev. A) PDF | HTML 07 Oct 2020
EVM User's guide TPS25947EVM: Evaluation Module for TPS25947 eFuse 30 Sep 2020
Application note eFuses in Smart Electricity Meters PDF | HTML 01 Sep 2020

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS25947EVM — TPS25947 eFuse evaluation module

The TPS25947EVM eFuse evaluation board allows reference circuit evaluation of TPS25947 eFuse products. The TPS25947xx device is a 2.7-V to 23-V, 5.5-A eFuse with integrated 28 mΩ FET with reverse current protection, input reverse polarity protection, over current, inrush current (...)
User guide: PDF
Not available on TI.com
Simulation model

TPS25947x PSpice Transient Model (Rev. A)

SLVMDJ6A.ZIP (131 KB) - PSpice Model
Calculation tool

TPS25947 Design Calculator

SLVRBH5.ZIP (163 KB)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDA-010239 — AC level 2 charger platform reference design

Electric vehicle service equipment (EVSE) facilitates power delivery to electric vehicles safely from the grid. An EVSE control system consists of an auxiliary power stage, an off-board AC/DC high power stage (only in DC charging stations), energy metering unit, AC and DC residual current (...)
Design guide: PDF
Reference designs

TIDA-010231 — Analog front end for arc detection in photovoltaic applications reference design

This reference design implements a four-channel analog front end for DC arc detection in photovoltaic systems, supports DC voltages up tp 1000 V and currents up to 10 A. Arcing is detected by analyzing the AC noise present on the DC current between the solar panels and inverter. The signal is (...)
Design guide: PDF
Package Pins Download
VQFN-HR (RPW) 10 View options

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