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LM74681

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100V Ideal diode bridge controller for PoE powered applications

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Data sheet

LM74681

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 30 Vin (max) (V) 90 FET External single FET Device type Ideal diode bridge controller Number of channels 4 Rating Catalog Features Enable, Full bridge diode rectifier controller, Linear control, Reverse current blocking, Reverse polarity protection, Under voltage lock out Iq (typ) (mA) 0.27 Iq (max) (mA) 0.45 IGate source (typ) (µA) 160 IGate sink (typ) (mA) 100 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) -1 Design support EVM VGS (max) (V) 14 Shutdown current (ISD) (mA) (A) 0.0000382 Product type Ideal diode controller
Vin (min) (V) 30 Vin (max) (V) 90 FET External single FET Device type Ideal diode bridge controller Number of channels 4 Rating Catalog Features Enable, Full bridge diode rectifier controller, Linear control, Reverse current blocking, Reverse polarity protection, Under voltage lock out Iq (typ) (mA) 0.27 Iq (max) (mA) 0.45 IGate source (typ) (µA) 160 IGate sink (typ) (mA) 100 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) -1 Design support EVM VGS (max) (V) 14 Shutdown current (ISD) (mA) (A) 0.0000382 Product type Ideal diode controller
WSON (DRR) 12 9 mm² 3 x 3
  • Input operating voltage range: 30V to 90V
    • 100V absolute maximum
  • 4× integrated gate drive control
  • 165µA gate pull-up strength
  • 100mA gate pull-down strength
  • Ultra-low quiescent current of 0.27µA during detection and classification phase (VIN1-IN2 < 23V)
  • Linear gate regulation control for supply ORing applications
    • VTG_REG = 11mV
  • Enable pin for user controlled device on/off function
  • –40°C to 125°C operating junction temperature range
  • Small footprint: 3mm × 3mm WSON-12
    • Meets IPC-9592 spacing rules
  • Input operating voltage range: 30V to 90V
    • 100V absolute maximum
  • 4× integrated gate drive control
  • 165µA gate pull-up strength
  • 100mA gate pull-down strength
  • Ultra-low quiescent current of 0.27µA during detection and classification phase (VIN1-IN2 < 23V)
  • Linear gate regulation control for supply ORing applications
    • VTG_REG = 11mV
  • Enable pin for user controlled device on/off function
  • –40°C to 125°C operating junction temperature range
  • Small footprint: 3mm × 3mm WSON-12
    • Meets IPC-9592 spacing rules
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Technical documentation

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Type Title Date
* Data sheet LM74681 100V Ideal Diode Bridge Controller for PoE Powered Applications datasheet PDF | HTML 27 Dec 2024
Application brief Achieve Low Loss Rectification Using TI's Diode Bridge Controllers PDF | HTML 09 Apr 2025
EVM User's guide LM74681 Evaluation Module (EVM) User's Guide PDF | HTML 04 Dec 2024
Certificate LM74681EVM EU Declaration of Conformity (DoC) 31 Oct 2024

Design & development

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Evaluation board

LM74681EVM — LM74681 evaluation module

The LM74681 evaluation module (EVM) helps designers evaluate the operation and performance of the LM74681 ideal diode bridge controller (12-pin DRR package). This EVM demonstrates how an N-channel power MOSFET driven by LM74681 can emulate a very low forward voltage diode and helps powering up (...)
User guide: PDF | HTML
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Simulation model

LM74681 PSPICE Model

SNOM807.ZIP (349 KB) - PSpice Model
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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 (...)
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WSON (DRR) 12 Ultra Librarian
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