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Ideale Diode und ODER-verknüpfende Controller

LM74721-Q1

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Idealer Diodencontroller, ohne TVS mit niedrigem IQ und Verpolungsschutz für die Automobilindustrie,

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Datenblatt

LM74721-Q1

AKTIV
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Produktdetails

Vin (max) (V) 65 Vin (min) (V) 3 FET External back-to-back FET, External single FET Device type Ideal diode controller Number of channels 1 Rating Automotive Features Automotive load dump compatibility, Enable, Integrated VDS clamp, Linear control, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.032 Iq (max) (mA) 0.038 TI functional safety category Functional Safety-Capable IGate sink (typ) (mA) 2.1 IGate pulsed (typ) (A) 2.1 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) -6.5 Design support EVM VGS (max) (V) 13 Shutdown current (ISD) (mA) (A) 0.0035 Product type Ideal diode controller
Vin (max) (V) 65 Vin (min) (V) 3 FET External back-to-back FET, External single FET Device type Ideal diode controller Number of channels 1 Rating Automotive Features Automotive load dump compatibility, Enable, Integrated VDS clamp, Linear control, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.032 Iq (max) (mA) 0.038 TI functional safety category Functional Safety-Capable IGate sink (typ) (mA) 2.1 IGate pulsed (typ) (A) 2.1 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) -6.5 Design support EVM VGS (max) (V) 13 Shutdown current (ISD) (mA) (A) 0.0035 Product type Ideal diode controller
WSON (DRR) 12 9 mm² (3 mm × 3 mm)
  • AEC-Q100 qualified with the following results
    • 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 –33 V
  • Integrated VDS clamp for Input TVS less operation for ISO7637 pulse suppression
  • Low quiescent current 35 µA (max) in operation
  • Low 3.3-µA (max) shutdown current (EN = Low)
  • Ideal diode operation with 17-mV A to C forward voltage drop regulation
  • Drives external back-to-back N-Channel MOSFETs
  • Integrated 30-mA boost regulator
  • Fast response to reverse current blocking: 0.5 µs
  • Active rectification up to 100 kHz
  • Adjustable overvoltage protection
  • Available in space saving 12-pin WSON package
  • Pin-to-pin compatible with LM74720-Q1
  • AEC-Q100 qualified with the following results
    • 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 –33 V
  • Integrated VDS clamp for Input TVS less operation for ISO7637 pulse suppression
  • Low quiescent current 35 µA (max) in operation
  • Low 3.3-µA (max) shutdown current (EN = Low)
  • Ideal diode operation with 17-mV A to C forward voltage drop regulation
  • Drives external back-to-back N-Channel MOSFETs
  • Integrated 30-mA boost regulator
  • Fast response to reverse current blocking: 0.5 µs
  • Active rectification up to 100 kHz
  • Adjustable overvoltage protection
  • Available in space saving 12-pin WSON package
  • Pin-to-pin compatible with LM74720-Q1

The LM74721-Q1 ideal diode controller drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON and OFF control and overvoltage protection. The wide input supply of 3 V to 65 V allows protection and control of 12-V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –33-V DC. An integrated ideal diode controller (GATE) drives the first MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. Integrated VDS clamp feature enables input TVS less system designs for automotive ISO7637 pulse suppression. A strong boost regulator with fast turn ON and OFF comparators ensures 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 up to 100-kHz frequency. Low Quiescent Current 35 µA (maximum) in operation enables always ON system designs. With a second MOSFET in the power path, the device allows load disconnect control using EN pin. Quiescent current reduces to 3.3 µA (maximum) with EN low. The device features an adjustable overvoltage cutoff protection feature for load dump protection.

The LM74721-Q1 ideal diode controller drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON and OFF control and overvoltage protection. The wide input supply of 3 V to 65 V allows protection and control of 12-V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –33-V DC. An integrated ideal diode controller (GATE) drives the first MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. Integrated VDS clamp feature enables input TVS less system designs for automotive ISO7637 pulse suppression. A strong boost regulator with fast turn ON and OFF comparators ensures 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 up to 100-kHz frequency. Low Quiescent Current 35 µA (maximum) in operation enables always ON system designs. With a second MOSFET in the power path, the device allows load disconnect control using EN pin. Quiescent current reduces to 3.3 µA (maximum) with EN low. The device features an adjustable overvoltage cutoff protection feature for load dump protection.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LM74721-Q1 TVS Less Low IQ Automotive Reverse Battery Protection Ideal Diode Controller with Active Rectification datasheet (Rev. B) PDF | HTML 07.07.2022
Zertifikat LM74721EVM EU RoHS Declaration of Conformity (DoC) 27.05.2022
Analog Design Journal Going TVS-less in Automotive Reverse Battery Protection Designs PDF | HTML 18.11.2021
Technischer Artikel 3 ways to design a low quiescent-current (Iq) automotive reverse battery protectio PDF | HTML 18.11.2021
Anwendungshinweis Basics of Ideal Diodes (Rev. B) PDF | HTML 05.10.2021
Application brief Active Rectification and its Advantages in Automotive ECU Designs PDF | HTML 29.09.2021
Analog Design Journal Automotive EMC-compliant reverse-battery protection with ideal-diode controllers 22.09.2020

Design und Entwicklung

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Evaluierungsplatine

LM74721EVM — LM74721-Q1-Evaluierungsmodul für idealen Diodencontroller

Das Evaluierungsmodul LM74721EVM unterstützt Designer bei der Evaluierung des Betriebs und der Leistung des Ideale-Diode-Reglers LM74721-Q1 in Verpolungsschutz-Batterieanwendungen. Dieses Evaluierungsmodul demonstriert, wie der LM74721-Q1 mit integriertem Aufwärtsregler für niedrigen IQ und (...)

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LM7472x-Q1 PSpice Transient Model

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