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電源保護開關與控制器
理想二極體與 ORing 控制器

LM74500-Q1

現行

反向極性保護控制器

立即訂購
產品規格表

LM74500-Q1

現行
產品規格表 立即訂購

產品詳細資料

Vin (max) (V) 65 Vin (min) (V) 3.2 FET External single FET Device type Reverse polarity protector Number of channels 1 Rating Automotive Features Automotive load dump compatibility, Enable, Reverse polarity protection Imax (A) 250 Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 TI functional safety category Functional Safety-Capable IGate source (typ) (µA) 11000 IGate pulsed (typ) (A) 2.3 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) 65 Design support EVM, Simulation Model Shutdown current (ISD) (mA) (A) 0.001 Product type Reverse polarity protector
Vin (max) (V) 65 Vin (min) (V) 3.2 FET External single FET Device type Reverse polarity protector Number of channels 1 Rating Automotive Features Automotive load dump compatibility, Enable, Reverse polarity protection Imax (A) 250 Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 TI functional safety category Functional Safety-Capable IGate source (typ) (µA) 11000 IGate pulsed (typ) (A) 2.3 Operating temperature range (°C) -40 to 125 VSense reverse (typ) (mV) 65 Design support EVM, Simulation Model Shutdown current (ISD) (mA) (A) 0.001 Product type Reverse polarity protector
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
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • 3.2-V to 65-V input range (3.9-V start up)
  • –65-V input reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • Enable pin feature
  • 1-µA shutdown current (EN=Low)
  • 80-µA typical operating quiescent current (EN=High)
  • Meets automotive ISO7637 pulse 1 transient requirements with additional TVS Diode
  • Available in 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
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • 3.2-V to 65-V input range (3.9-V start up)
  • –65-V input reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • Enable pin feature
  • 1-µA shutdown current (EN=Low)
  • 80-µA typical operating quiescent current (EN=High)
  • Meets automotive ISO7637 pulse 1 transient requirements with additional TVS Diode
  • Available in 8-pin SOT-23 package 2.90 mm × 1.60 mm

The LM74500-Q1 is an automotive AEC Q100 qualified controller which operates in conjunction with an external N-channel MOSFET as a low loss reverse polarity protection solution. 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 automotive battery systems. The 3.2-V input voltage support is particularly well suited 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 LM74500-Q1 does not have reverse current blocking and is suitable for input reverse poalrity protection of loads that can potentially deliver energy back to the input supply such as automotive body control module motor loads.

The LM74500-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74500-Q1 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 thus offering low system current when put into sleep mode.

The LM74500-Q1 is an automotive AEC Q100 qualified controller which operates in conjunction with an external N-channel MOSFET as a low loss reverse polarity protection solution. 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 automotive battery systems. The 3.2-V input voltage support is particularly well suited 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 LM74500-Q1 does not have reverse current blocking and is suitable for input reverse poalrity protection of loads that can potentially deliver energy back to the input supply such as automotive body control module motor loads.

The LM74500-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74500-Q1 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 thus offering low system current when put into sleep mode.
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技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet LM74500-Q1 Reverse Polarity Protection Controller datasheet PDF | HTML 2020年 12月 23日
White paper Design Considerations for 48V Automotive Body Motor Applications PDF | HTML 2026年 2月 17日
Functional safety information LM74500-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2024年 1月 18日
Application note Basics of Ideal Diodes (Rev. B) PDF | HTML 2021年 10月 5日
Certificate LM74500Q1EVM EU RoHS Declaration of Conformity (DoC) 2020年 12月 3日
White paper 簡化汽車及工業領域的功 能安全認證 2020年 6月 9日
E-book 11 Ways to Protect Your Power Path 2019年 7月 3日
Application note Basics of Power Switches (Rev. A) PDF | HTML 2019年 4月 26日

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開發板

LM74500Q1EVM — LM74500-Q1 3.2-V 至 65V、80-μA IQ 反向極性保護控制器評估模組

LM74500-Q1 評估模組 (LM74500Q1EVM) 可協助設計人員評估 LM74500-Q1 反向極性保護控制器的運作及性能。此評估模組示範如何使用 N 通道電源 MOSFET，以低 IQ LM74500-Q1 控制器實現輸入反向電壓保護。

使用指南: PDF | HTML
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開發板

LM74700DDFEVM — LM74700-Q1 3.2-V 至 65-V、80-μA IQ 車用理想二極體控制器 (DDF 封裝) 評估模組

LM74700DDFEVM 可協助設計人員評估 LM74700-Q1 3.2-V 至 65-V、80-μA IQ 車用理想二極體控制器 (DDF 封裝) 的運作和性能。此評估模組展示 N 通道功率 MOSFET 如何以流經 IC 的低 IQ 和低漏電流模擬超低順向電壓二極體。

使用指南: PDF | HTML
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模擬型號

LM74500-Q1 PSpice Transient Model

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參考設計

PMP31344 — Automotive, 12V input, 140W two-port USB Power Delivery with DisplayPort™ ALT mode reference design

This reference design represents an automotive USB Extended Power Range (EPR) system, providing both power and digital communication to two USB Type-C® ports. When connecting a USB-C cable, the TPS26744E-Q1 negotiates a target output voltage and maximum current with the plugged-in device. The (...)
Test report: PDF
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SOT-23-THN (DDF) 8 Ultra Librarian
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