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LM7480-Q1

ACTIVE

3-V to 65-V, automotive ideal diode controller driving back to back NFETs

Product details

Vin (min) (V) 3 Vin (max) (V) 65 Number of channels 2 Features Automotive load dump compatibility, Inrush current control, Linear control, Overvoltage protection, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.412 Iq (max) (mA) 0.495 TI functional safety category Functional Safety-Capable FET External back-to-back FET IGate source (typ) (µA) 20000 IGate sink (typ) (mA) 2670 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 Imax (A) 300 VGS (max) (V) 15 Shutdown current (ISD) (mA) (A) 0.003 Device type Ideal diode controller Product type Ideal diode controller
Vin (min) (V) 3 Vin (max) (V) 65 Number of channels 2 Features Automotive load dump compatibility, Inrush current control, Linear control, Overvoltage protection, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.412 Iq (max) (mA) 0.495 TI functional safety category Functional Safety-Capable FET External back-to-back FET IGate source (typ) (µA) 20000 IGate sink (typ) (mA) 2670 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 Imax (A) 300 VGS (max) (V) 15 Shutdown current (ISD) (mA) (A) 0.003 Device type Ideal diode controller Product type Ideal diode controller
WSON (DRR) 12 9 mm² 3 x 3
  • 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 in common drain and common source configurations
  • Ideal diode operation with 10.5-mV A to C forward voltage drop regulation (LM74800-Q1)
  • Low reverse detection threshold (–4.5 mV) with fast response (0.5 µs)
  • 20-mA peak gate (DGATE) turnon current
  • 2.6-A peak DGATE turnoff current
  • Adjustable overvoltage protection
  • Low 2.87-µA shutdown current (EN/UVLO=Low)
  • Meets automotive ISO7637 transient requirements with a suitable TVS diode
  • Available in space saving 12-Pin WSON package
  • 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 in common drain and common source configurations
  • Ideal diode operation with 10.5-mV A to C forward voltage drop regulation (LM74800-Q1)
  • Low reverse detection threshold (–4.5 mV) with fast response (0.5 µs)
  • 20-mA peak gate (DGATE) turnon current
  • 2.6-A peak DGATE turnoff current
  • Adjustable overvoltage protection
  • Low 2.87-µA shutdown current (EN/UVLO=Low)
  • Meets automotive ISO7637 transient requirements with a suitable TVS diode
  • Available in space saving 12-Pin WSON package

The LM7480x-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 overvoltage 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. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) and overvoltage protection using HGATE control. The device features an adjustable overvoltage cut-off protection feature. LM7480-Q1 has two variants, LM74800-Q1 and LM74801-Q1. LM74800-Q1 employs reverse current blocking using linear regulation and comparator scheme vs. LM74801-Q1 which supports comparator based scheme. With Common Drain configuration of the power MOSFETs, the mid-point can be utilized for OR-ing designs using an another ideal diode. The LM7480x-Q1 has a maximum voltage rating of 65 V. The loads can be protected from extended overvoltage transients like 200-V Unsuppressed Load Dumps in 24-V Battery systems by configuring the device with external MOSFETs in Common Source topology.

The LM7480x-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 overvoltage 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. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) and overvoltage protection using HGATE control. The device features an adjustable overvoltage cut-off protection feature. LM7480-Q1 has two variants, LM74800-Q1 and LM74801-Q1. LM74800-Q1 employs reverse current blocking using linear regulation and comparator scheme vs. LM74801-Q1 which supports comparator based scheme. With Common Drain configuration of the power MOSFETs, the mid-point can be utilized for OR-ing designs using an another ideal diode. The LM7480x-Q1 has a maximum voltage rating of 65 V. The loads can be protected from extended overvoltage transients like 200-V Unsuppressed Load Dumps in 24-V Battery systems by configuring the device with external MOSFETs in Common Source topology.

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Technical documentation

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Type Title Date
* Data sheet LM7480-Q1 Ideal Diode Controller with Load Dump Protection datasheet (Rev. C) PDF | HTML 08 Dec 2020
Functional safety information LM7480-Q1 Functional Safety FIT Rate, Failure Mode Distribution, and Pin FMA PDF | HTML 06 Feb 2024
Application brief Priority Power MUX using Ideal Diodes in Automotive Zonal Modules PDF | HTML 23 May 2023
Application note Basics of Ideal Diodes (Rev. B) PDF | HTML 05 Oct 2021
EVM User's guide LM74800 Evaluation Module: LM74800EVM-CD (Rev. A) PDF | HTML 16 Oct 2020
Analog Design Journal Automotive EMC-compliant reverse-battery protection with ideal-diode controllers 22 Sep 2020
Application note Ideal Diode Controllers for Active Rectification of AC Voltage Ripple 30 Jun 2020
Application brief Single Point Failure Protection for Motor Drives and PLC Systems 30 Jun 2020
Functional safety information Streamlining Functional Safety Certification in Automotive and Industrial 09 Jun 2020
White paper 簡化汽車及工業領域的功 能安全認證 09 Jun 2020
White paper 자동차 및 산업 분야의 기능적 안전성 인증 간소화 09 Jun 2020
Application note Six System Architectures With Robust Reverse Battery Protection 30 Apr 2020

Design & development

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

Evaluation board

LM74800EVM-CD — LM74800-Q1 ideal diode controller evaluation module

TI's Evaluation Module LM74800EVM-CD helps designers evaluate the operation and performance of the LM7480-Q1 ideal diode controllers (LM74800QDRR and LM74801QDRR) in reverse battery protection applications. This evaluation module demonstrates how LM7480-Q1 controls two back-back N-channel power (...)

User guide: PDF | HTML
Not available on TI.com
Evaluation board

LM74800EVM-CS — LM7480-Q1 ideal diode controller evaluation module

TI's evaluation module LM74800EVM-CD helps designers evaluate the operation and performance of the LM7480-Q1 ideal diode controllers (LM74800QDRR and LM74801QDRR) in reverse battery protection applications. This evaluation module demonstrates how LM7480-Q1 controls two back-back N-channel power (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

LM74800-Q1 PSPICE Transient Model

SLVMDB8.ZIP (145 KB) - PSpice Model
Simulation model

LM74800-Q1 TINA-TI Common Drain Transient Model

SLVMDD0.TSC (407 KB) - TINA-TI Spice Model
Simulation model

LM74800-Q1 TINA-TI Common Source Transient Model

SLVMDD1.TSC (656 KB) - TINA-TI Spice Model
Calculation tool

FET-INRUSH-SOA-CALC FET SOA margin calculator for dvdt based startup

The design calculator allows user to estimate the FET SOA margin while starting up with dVdt based startup for inrush current control
Supported products & hardware

Supported products & hardware

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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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Test report: PDF
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TIDA-010240 — Scalable multi-pack smart battery charger reference design

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Design guide: PDF
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WSON (DRR) 12 Ultra Librarian

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