Product details


Vin (Min) (V) 3 Vin (Max) (V) 65 Features Linear control, Reverse polarity protection, Reverse current blocking Iq (Typ) (mA) 0.428 Iq (Max) (mA) 0.5 IGate source (Typ) (uA) 60000 IGate sink (Typ) (mA) 1500 IGate pulsed (Typ) (A) 2.6 Operating temperature range (C) -40 to 125 VSense reverse (Typ) (mV) -4.5 Design support EVM, Simulation Model Rating Automotive Channel(s) controlled (#) 2 FET External VGS (Max) (V) 15 open-in-new Find other Ideal diode/ORing controllers

Package | Pins | Size

WSON (DRR) 12 9 mm² 3 x 3 open-in-new Find other Ideal diode/ORing controllers


  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • 3-V to 65-V input range
  • Reverse input protection down to –65 V
  • Drives external back to back N-channel MOSFETs
  • Ideal diode operation with 9.1-mV A to C forward voltage drop regulation
  • Low reverse detection threshold (–4 mV) with fast response (0.5 µs)
  • Active rectification up to 200-KHz
  • 60-mA peak gate (DGATE) turn-on current
  • 2.6-A peak DGATE turnoff current
  • Integrated 3.8-mA charge pump
  • Adjustable over voltage protection
  • Low 2.87 µA shutdown current (EN/UVLO=Low)
  • 2.6-A peak DGATE turn-off current
  • Meets automotive ISO7637 transient requirements with a suitable TVS diode
  • Available in space saving 12-Pin WSON package
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The LM74810-Q1 ideal diode controller drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON/OFF control and over voltage protection. The wide input supply of 3 V to 65 V allows protection and control of 12-V and 24-V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –65 V. An integrated ideal diode controller (DGATE) drives the first MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. A strong charge pump of 3.8 mA with 60-mA peak GATE source current driver stage and short turn ON and turn OFF delay times ensures fast transient response ensuring robust and efficient MOSFET switching performance during automotive testing such as ISO16750 or LV124 where an ECU is subjected to input short interruptions and AC superimpose input signals upto 200-KHz frequency. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) and over voltage protection using HGATE control. The device features an adjustable over voltage cut-off protection feature for load dump protection.

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Technical documentation

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Type Title Date
* Data sheet LM7481-Q1 Ideal Diode Controller with Active Rectification and Load Dump Protection datasheet (Rev. A) Dec. 07, 2020
Application note Basics of Ideal Diodes (Rev. A) Feb. 17, 2021
User guide LM74810 Evaluation Module: LM74810EVM (Rev. A) Dec. 09, 2020
Application note Automotive EMC-compliant reverse-battery protection with ideal-diode controllers Sep. 22, 2020
Application note Ideal Diode Controllers for Active Rectification of AC Voltage Ripple Jun. 30, 2020
White paper Streamlining Functional Safety Certification in Automotive and Industrial Jun. 09, 2020
White paper 簡化汽車及工業領域的功 能安全認證 Jun. 09, 2020
White paper 자동차 및 산업 분야의 기능적 안전성 인증 간소화 Jun. 09, 2020
Application note Six System Architectures With Robust Reverse Battery Protection Using an Ideal D Apr. 30, 2020

Design & development

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Hardware development

document-generic User guide
TI's Evaluation Module LM74810EVM helps designers evaluate the operation and performance of the LM7481-Q1 ideal diode controllers (LM74810QDRR) in reverse battery protection applications. This evaluation module demonstrates LM7481-Q1 Ideal Diode controller's capability to provide reverse battery (...)
  • Reverse battery protection for high power ECU designs
  • Switched output and power path cut-off
  • Over voltage protection
  • Meets automotive transient immunity test requirements
  • Two external N-Channel MOSFETs connected back-back in common drain configuration

Design tools & simulation

SNOM681.ZIP (145 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Automotive transient and overcurrent protection filter reference design
TIDA-020040 — This reference design showcases a protection system for voltage and current transient events typically found in automotive systems. This reference design optimizes functionality, size and protection capabilities while not sacrificing power delivery for premium audio amplifiers.
document-generic Schematic

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