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LM74700-EP

ACTIVO

Controlador de diodo ideal mejorado con baja IQ

Detalles del producto

Vin (max) (V) 65 Vin (min) (V) 3.2 FET External single FET Device type Ideal diode controller Number of channels 1 Rating HiRel Enhanced Product Features Enable, Linear control, Reverse current blocking, Reverse polarity protection Imax (A) 250 Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 IGate source (typ) (µA) 11000 IGate sink (typ) (mA) 2370 IGate pulsed (typ) (A) 2.3 Operating temperature range (°C) -50 to 125 VSense reverse (typ) (mV) -11 Design support EVM Shutdown current (ISD) (mA) (A) 0.001 Product type Ideal diode controller
Vin (max) (V) 65 Vin (min) (V) 3.2 FET External single FET Device type Ideal diode controller Number of channels 1 Rating HiRel Enhanced Product Features Enable, Linear control, Reverse current blocking, Reverse polarity protection Imax (A) 250 Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 IGate source (typ) (µA) 11000 IGate sink (typ) (mA) 2370 IGate pulsed (typ) (A) 2.3 Operating temperature range (°C) -50 to 125 VSense reverse (typ) (mV) -11 Design support EVM Shutdown current (ISD) (mA) (A) 0.001 Product type Ideal diode controller
SOT-23-THN (DDF) 8 8.12 mm² (2.9 mm × 2.8 mm)
  • 3.2-V to 65-V Input range (3.9-V startup)
  • –65-V reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • 20-mV ANODE to CATHODE forward voltage drop regulation
  • Enable pin feature
  • 1-µA shutdown current (EN = Low)
  • 80-µA operating quiescent current (EN = High)
  • 2.3-A peak gate turnoff current
  • Fast response to reverse current blocking: < 0.75 µs
  • Meets automotive ISO7637 transient requirements with a suitable TVS Diode
  • Available in 8 pin SOT-23 package 2.90 mm × 1.60 mm
  • Military temperature range –55°C to +125°C
  • One fabrication, assembly and test site
  • Extended product life cycle
  • Extended product change notification
  • Product traceability
  • 3.2-V to 65-V Input range (3.9-V startup)
  • –65-V reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • 20-mV ANODE to CATHODE forward voltage drop regulation
  • Enable pin feature
  • 1-µA shutdown current (EN = Low)
  • 80-µA operating quiescent current (EN = High)
  • 2.3-A peak gate turnoff current
  • Fast response to reverse current blocking: < 0.75 µs
  • Meets automotive ISO7637 transient requirements with a suitable TVS Diode
  • Available in 8 pin SOT-23 package 2.90 mm × 1.60 mm
  • Military temperature range –55°C to +125°C
  • One fabrication, assembly and test site
  • Extended product life cycle
  • Extended product change notification
  • Product traceability

The LM74700-EP is an ideal diode controller which operates in conjunction with an external N-channel MOSFET as an ideal diode rectifier for low loss reverse polarity protection with a 20-mV forward voltage drop. The wide supply input range of 3.2 V to 65 V allows control of many popular DC bus voltages such as 12-V, 24-V and 48-V systems. The device can withstand and protect the loads from negative supply voltages down to –65 V.

The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20 mV. The regulation scheme enables graceful turn off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Fast response (< 0.75 µs) to Reverse Current Blocking makes the device suitable for systems with output voltage holdup requirements during power fail and input micro-short conditions.

The LM74700-EP controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700-EP helps to simplify the system designs for automotive ISO7637 protection. With the enable pin low, the controller is off and draws approximately 1 µA of current. The LM74700-EP is fully specified over the temperature range of TA = –55°C to +125°C.

The LM74700-EP is an ideal diode controller which operates in conjunction with an external N-channel MOSFET as an ideal diode rectifier for low loss reverse polarity protection with a 20-mV forward voltage drop. The wide supply input range of 3.2 V to 65 V allows control of many popular DC bus voltages such as 12-V, 24-V and 48-V systems. The device can withstand and protect the loads from negative supply voltages down to –65 V.

The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20 mV. The regulation scheme enables graceful turn off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Fast response (< 0.75 µs) to Reverse Current Blocking makes the device suitable for systems with output voltage holdup requirements during power fail and input micro-short conditions.

The LM74700-EP controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700-EP helps to simplify the system designs for automotive ISO7637 protection. With the enable pin low, the controller is off and draws approximately 1 µA of current. The LM74700-EP is fully specified over the temperature range of TA = –55°C to +125°C.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM74700-EP Low IQ Ideal Diode Controller datasheet PDF | HTML 1/09/2021
* Informe de radiación y confiabilidad LM74700-EP Reliability Report PDF | HTML 1/09/2021

Diseño y desarrollo

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Placa de evaluación

LM74700DDFEVM — LM74700-Q1 3.2 V a 65 V, 80 μA IQ controlador de diodo ideal de uso automotriz (encapsulado DDF) mód

El LM74700DDFEVM ayuda a los diseñadores a evaluar el funcionamiento y el rendimiento del controlador de diodo ideal (encapsulado DDF) LM74700-Q1 3.2 V a 65 V, IQ de 80 μA de uso automotriz. Este módulo de evaluación demuestra cómo un MOSFET de potencia de canal N puede emular un diodo de tensión (...)

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Modelo de simulación

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