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LM74704-Q1

現行

具有 FET 良好開漏輸出的車用理想二極體控制器

產品詳細資料

Vin (min) (V) 3.2 Vin (max) (V) 65 Number of channels 1 Features Automotive load dump compatibility, Enable, Linear control, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 TI functional safety category Functional Safety-Capable FET External single FET IGate source (typ) (µA) 11000 IGate sink (typ) (mA) 2370 IGate pulsed (typ) (A) 2.37 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) -11 Design support EVM Rating Automotive Imax (A) 250 Shutdown current (ISD) (mA) (A) 0.001 Device type Ideal diode controller Product type Ideal diode controller
Vin (min) (V) 3.2 Vin (max) (V) 65 Number of channels 1 Features Automotive load dump compatibility, Enable, Linear control, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 TI functional safety category Functional Safety-Capable FET External single FET IGate source (typ) (µA) 11000 IGate sink (typ) (mA) 2370 IGate pulsed (typ) (A) 2.37 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) -11 Design support EVM Rating Automotive Imax (A) 250 Shutdown current (ISD) (mA) (A) 0.001 Device type Ideal diode controller Product type Ideal diode controller
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8
  • AEC-Q100 qualified with the following results
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • 3.2-V to 65-V input range (3.9-V start up)
  • –65-V reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • 20-mV ANODE to CATHODE pin 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
  • FETGOOD output to indicate external MOSFET health status
  • Fast response to reverse current blocking: < 0.75 µs
  • EMI performance over extended frequency range (150-kHz to 1-GHz)
  • Meets automotive ISO7637 transient requirements with external TVS Diode
  • 8-pin SOT-23 package 2.90 mm × 1.60 mm
  • AEC-Q100 qualified with the following results
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • 3.2-V to 65-V input range (3.9-V start up)
  • –65-V reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • 20-mV ANODE to CATHODE pin 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
  • FETGOOD output to indicate external MOSFET health status
  • Fast response to reverse current blocking: < 0.75 µs
  • EMI performance over extended frequency range (150-kHz to 1-GHz)
  • Meets automotive ISO7637 transient requirements with external TVS Diode
  • 8-pin SOT-23 package 2.90 mm × 1.60 mm

The LM74703-Q1, LM74704-Q1 is an automotive AEC Q100 qualified 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 popular DC bus voltages such as 12-V, 24-V, and 48-V automotive battery systems. The 3.2-V input voltage support is designed especially for severe cold crank requirements in automotive 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 provides zero DC reverse current flow. Fast response (< 0.75 µs) to reverse current blocking makes the device applicable for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions. LM74703-Q1, LM74704-Q1 has FETGOOD output to indicate external MOSFET drain to source short or open condition. The device features enable pin (EN). With the enable pin low, the controller is off and draws approximately 1-µA of current.

The LM74703-Q1, LM74704-Q1 is an automotive AEC Q100 qualified 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 popular DC bus voltages such as 12-V, 24-V, and 48-V automotive battery systems. The 3.2-V input voltage support is designed especially for severe cold crank requirements in automotive 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 provides zero DC reverse current flow. Fast response (< 0.75 µs) to reverse current blocking makes the device applicable for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions. LM74703-Q1, LM74704-Q1 has FETGOOD output to indicate external MOSFET drain to source short or open condition. The device features enable pin (EN). With the enable pin low, the controller is off and draws approximately 1-µA of current.

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類型 標題 日期
* Data sheet LM74703-Q1, LM74704-Q1 Automotive Ideal Diode Controller With External FET Health Indication datasheet (Rev. A) PDF | HTML 2023年 12月 7日
Functional safety information LM74703-Q1 and LM74704-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2024年 6月 6日
EVM User's guide LM74704Q1EVM, LM74703-Q1, LM74704-Q1 Evaluation Module for Ideal Diode Controlle PDF | HTML 2023年 5月 23日
Certificate LM74704Q1EVM EU Declaration of Conformity (DoC) 2023年 5月 4日

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開發板

LM74704Q1EVM — 適用於理想二極體控制器的 LM74704-Q1 與 LM74703-Q1 評估模組

LM74704Q1EVM 評估模組 (EVM) 可協助評估 LM74703-Q1 和 LM74704-Q1 理想二極體控制器在反向電池保護應用中的運作及性能。此 EVM 展示 LM74704-Q1 如何以理想二極體整流器的形式搭配外部 N 通道 MOSFET 運作,以透過 20-mV 順向壓降實現低損耗反向極性保護,並以 FET_Good 輸出指示外部 FET 狀態。

使用指南: PDF | HTML
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