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Introduction, characteristics, and applications of Texas Instruments TPS25983 hot-swappable nozzle

2/13/2024 9:30:08 AM

Summary: 2.7V to 26V, 2.7 milliohm and 18A integrated hot-swap efes with current monitor and blocking FET driver.

TPS25983 Texas Instruments

Texas Instruments TPS25983 hot-swappable eFuses are highly integrated circuit protection and power management devices in small packages. These fuses operate over a wide input voltage range of 2.7V to 26V and provide strong protection against overloads, short circuits, voltage surges, reverse current and excessive inrush current. The overcurrent limit threshold can be set with a single external resistor, and overvoltage events are limited by an internal cutoff circuit with a user-adjustable overvoltage threshold. Typical applications include power multiplexing, hot plugging, hot plugging, PCIe risers, add-in cards, router/switch optical module protection, industrial PCs and wireless power tool chargers.

These devices intelligently manage overcurrent response by distinguishing transient events from actual faults. This allows the system to operate uninterrupted during line and load transients without compromising the robustness of protection against faults. The TPS25983 hot-swap fuse is available in a small 4mm × 4mm QFN package and is characterized by operation over a -40°C to 125°C junction temperature range.


characteristic

  • 2.7V to 26V wide input voltage range:

    • 30V absolute maximum

  • Low on-resistance:

    • R(ON) = 2.7 milliohms typical

  • Adjustable current limit threshold:

    • Range 2A to 18A

    • ±8% accuracy (typical I(LIM) greater than 5A)

  • Circuit breaker and current limiter options

  • Adjustable overcurrent disconnection timer:

    • Handles load transients without tripping

  • Accurate current monitoring output:

    • ±1.5% (Typically at 25°C, I(OUT) is greater than 3A)

    • ±3% (maximum value when I(OUT) is greater than 3A)

  • Adjustable undervoltage lockout

  • Adjustable overvoltage lockout

  • User configurable fault response:

    • Block or auto-retry

    • Number of retries (limited or unlimited)

    • Retry interval

  • Strong short circuit protection:

    • Fast trip response time is less than 400ns

    • Immune to line transients - no troublesome trips

  • Adjustable output slew rate (dVdt) control

  • Option to drive external FET for reverse current blocking in disabled/off state

  • Integrated over-temperature protection

  • Power good indication

  • Small footprint:

    • 4mm × 4mm QFN package


app

  • Hot plug and hot plug

  • multiplexing of power

  • Server rail preparation, PCIe riser, expansion card, fan module protection

  • Router and switch optical module protection

  • Industrial computer

  • cordless power tool charger


Functional block diagram



Schematic diagram


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