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Texas Instruments TPS25948 Bi-directional Power Delivery eFuses

Texas Instruments TPS25948 Bi-directional Power Delivery eFuses provide a robust defense against overloads, short circuits, voltage surges, reverse polarities, and excessive inrush currents. These highly integrated devices provide circuit protection and power-management solutions in small 12-ball Power Wafer Chip Scale Packages (PowerWCSP). The TPS25948 eFuses employ a linear ORing-based scheme, ensuring almost zero DC-reverse currents and emulating ideal diode characteristics with minimal forward voltage drop and power dissipation. These bi-directional power delivery devices respond to output overload by actively limiting the current.

The reverse current flow from output to input is always blocked with integrated back-to-back FETs. This makes the devices well-suited for power MUX and ORing applications and systems that need load-side energy hold-up storage if the input power supply fails. Typical applications include USB PD protection, adapter/charger protection, and enterprise storage devices like HBA, SAN, and eSSDs.

Features

  • 3.5V to 23V wide operating input voltage range:
    • 28V absolute maximum
    • Can be powered from either IN or OUT
  • Integrated back-to-back FETs with low On-resistance: RON = 12.2mΩ (typical)
  • Ideal diode operation with true Reverse Current Blocking (RCB):
    • External pin control (RCBCTRL) to disable RCB and allow bi-directional power delivery in steady-state to support USB OTG or DRP operation
  • Overcurrent protection with load current monitor output (ILM):
    • Active current limit response
    • Adjustable threshold (ILIM) 1A to 9A
      • ±10% accuracy (maximum) for ILIM>3A
    • Adjustable transient blanking timer (ITIMER) to allow peak currents > ILIM
    • Output load current monitor accuracy:
      • ±6% (typical) (IOUT ≥ 3A)
  • Fast overvoltage protection:
    • Adjustable Overvoltage Lockout (OVLO) with 1µs (typical) response time
  • Fast-trip response for short-circuit protection:
    • <1µs (typical) response time
    • Adjustable and fixed thresholds
  • Active high enable input with adjustable Undervoltage Lockout Threshold (UVLO)
  • Adjustable output slew rate control (dVdt)
  • Overtemperature protection
  • Digital outputs:
    • Supply Good (SPLYGD/ SPLYGD) and fault indication (FLT)
  • UL 2367 recognition (planned)
  • IEC 62368-1 CB certification (planned)
  • Small footprint:
    • PowerWCSP 2.4mm × 1.7mm, 0.5mm pitch

Applications

  • Adapter and charger input protection
  • USB PD protection:
    • Smartphones, tablets, PCs, notebooks, monitors, and docks
  • Power MUXing and ORing
  • Server motherboards and add-on cards
  • Enterprise storage:
    • HBA, SAN, and eSSDs

Associated Evaluation Module

Texas Instruments TPS25948EVM Evaluation Module

Allows users a reference circuit evaluation of the TPS25948 eFuse.

Learn Moreabout Texas Instruments TPS25948EVM Evaluation Module View Productsrelated to Texas Instruments TPS25948EVM Evaluation Module

Schematic

Schematic - Texas Instruments TPS25948 Bi-directional Power Delivery eFuses
Published: 2024-01-10 | Updated: 2024-04-29