Inicio Gestión de la energía Interruptores de potencia Controladores de diodo ideal/ORing

LM74912-Q1

ACTIVO

Diodo ideal con protección integrada contra sobretensiones y cortocircuitos con salida de falla para

Detalles del producto

Vin (min) (V) 3 Vin (max) (V) 65 Number of channels 1 Features Adjustable current limit, Analog current monitor, Overvoltage protection, Reverse current blocking, Reverse polarity protection, Short circuit protection, Under voltage lock out Iq (typ) (mA) 0.63 FET External back-to-back FET IGate source (typ) (µA) 18500 IGate sink (typ) (mA) 2670 Operating temperature range (°C) -40 to 125 Rating Automotive Shutdown current (ISD) (mA) (A) 0.00287 Device type Ideal diode controller Product type Ideal diode controller
Vin (min) (V) 3 Vin (max) (V) 65 Number of channels 1 Features Adjustable current limit, Analog current monitor, Overvoltage protection, Reverse current blocking, Reverse polarity protection, Short circuit protection, Under voltage lock out Iq (typ) (mA) 0.63 FET External back-to-back FET IGate source (typ) (µA) 18500 IGate sink (typ) (mA) 2670 Operating temperature range (°C) -40 to 125 Rating Automotive Shutdown current (ISD) (mA) (A) 0.00287 Device type Ideal diode controller Product type Ideal diode controller
VQFN (RGE) 24 16 mm² 4 x 4
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
  • Functional Safety-Capable
  • 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 configuration
  • Ideal diode operation with 10.5-mV A to C forward voltage drop regulation
  • Low reverse detection threshold (–10.5 mV) with fast response (0.5 µs)
  • 20-mA peak gate (DGATE) turn-on current
  • 2.6-A peak DGATE turn-off current
  • Adjustable overvoltage and undervoltage protection
  • Output short circuit protection with MOSFET latched off state
  • Ultra low power mode with 2.5-µA shutdown current (EN=Low)
  • SLEEP mode with 6-µA current (EN=High, SLEEP=Low)
  • Meets automotive ISO7637 transient requirements with a suitable transient voltage suppressor (TVS) diode
  • Available in 4 mm × 4 mm 24-pin VQFN package
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
  • Functional Safety-Capable
  • 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 configuration
  • Ideal diode operation with 10.5-mV A to C forward voltage drop regulation
  • Low reverse detection threshold (–10.5 mV) with fast response (0.5 µs)
  • 20-mA peak gate (DGATE) turn-on current
  • 2.6-A peak DGATE turn-off current
  • Adjustable overvoltage and undervoltage protection
  • Output short circuit protection with MOSFET latched off state
  • Ultra low power mode with 2.5-µA shutdown current (EN=Low)
  • SLEEP mode with 6-µA current (EN=High, SLEEP=Low)
  • Meets automotive ISO7637 transient requirements with a suitable transient voltage suppressor (TVS) diode
  • Available in 4 mm × 4 mm 24-pin VQFN package

The LM74912-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 with overvoltage, undervoltage and output short circuit 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) in case of overcurrent and overvoltage events using HGATE control. The device has integrated current sense amplifier which provides external MOSFET VDS sense based short circuit protection with an adjustable current limit. When short circuit condition is detected on the output then device latches off the load disconnect MOSFET. The device features an adjustable overvoltage cut-off protection feature. The device features a SLEEP mode which enables ultra low quiescent current consumption (6 µA) and at the same time providing refresh current to the always ON loads when vehicle is in the parking state. The LM74912-Q1 has a maximum voltage rating of 65 V.

The LM74912-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 with overvoltage, undervoltage and output short circuit 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) in case of overcurrent and overvoltage events using HGATE control. The device has integrated current sense amplifier which provides external MOSFET VDS sense based short circuit protection with an adjustable current limit. When short circuit condition is detected on the output then device latches off the load disconnect MOSFET. The device features an adjustable overvoltage cut-off protection feature. The device features a SLEEP mode which enables ultra low quiescent current consumption (6 µA) and at the same time providing refresh current to the always ON loads when vehicle is in the parking state. The LM74912-Q1 has a maximum voltage rating of 65 V.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM74912-Q1 Automotive Ideal Diode Controller With Fault Output and Overvoltage, Undervoltage, and Short Circuit Protection datasheet (Rev. A) PDF | HTML 20 sep 2023
Application brief Enabling Ultra Low Quiescent Current Through LM74912- Q1 Sleep Mode While Powering Always On Loads PDF | HTML 11 dic 2023
Certificate LM74912Q1EVM EU Declaration of Conformity (DoC) 26 jun 2023

Diseño y desarrollo

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Placa de evaluación

LM74912Q1EVM — Módulo de evaluación LM74912-Q1 para controlador de diodo ideal

El módulo de evaluación LM74912-Q1 evalúa el funcionamiento y el rendimiento del controlador de diodo ideal LM74912-Q1 en aplicaciones de protección inversa de la batería. Este módulo de evaluación demuestra cómo el LM74912-Q1 controla dos MOSFET de potencia de canal N inverso para emular un (...)

Guía del usuario: PDF | HTML
Modelo de simulación

LM74912-Q1 PSpice Transient Model

SNOM786.ZIP (118 KB) - PSpice Model
Herramienta de cálculo

LM74912-CALC Design calculator for LM74912-Q1 ideal diode controller

The design calculator allows user to size the external peripheral components while designing with LM74912-Q1 ideal diode controller
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores de diodo ideal/ORing
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Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de 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 (...)
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Test report: PDF
Paquete Pasadores Descargar
VQFN (RGE) 24 Ver opciones

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