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LM74502

現行

具有負載斷開和 OVP 的 3.2-V 至 65-V 工業 RPP 控制器

產品詳細資料

Vin (min) (V) 3.2 Vin (max) (V) 65 Number of channels 1 Features Enable, Inrush current control, Overvoltage protection, Reverse polarity protection Iq (typ) (mA) 0.06 Iq (max) (mA) 0.11 FET External single FET IGate source (typ) (µA) 60 IGate source (max) (µA) 77 IGate sink (typ) (mA) 2370 IGate pulsed (typ) (A) 2.37 Operating temperature range (°C) -40 to 125 IReverse (typ) (µA) 100 Design support EVM Rating Catalog Imax (A) 250 Shutdown current (ISD) (mA) (A) 0.001 Device type Reverse polarity protector Product type Reverse polarity protector
Vin (min) (V) 3.2 Vin (max) (V) 65 Number of channels 1 Features Enable, Inrush current control, Overvoltage protection, Reverse polarity protection Iq (typ) (mA) 0.06 Iq (max) (mA) 0.11 FET External single FET IGate source (typ) (µA) 60 IGate source (max) (µA) 77 IGate sink (typ) (mA) 2370 IGate pulsed (typ) (A) 2.37 Operating temperature range (°C) -40 to 125 IReverse (typ) (µA) 100 Design support EVM Rating Catalog Imax (A) 250 Shutdown current (ISD) (mA) (A) 0.001 Device type Reverse polarity protector Product type Reverse polarity protector
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8
  • 3.2-V to 65-V input range (3.9-V start-up)
  • –65-V input reverse voltage rating
  • Integrated charge pump to drive
    • External back-to-back N-Channel MOSFETs
    • External high side switch MOSFET

    • External reverse polarity protection MOSFET

  • Gate drive variants
    • LM74502: 60-µA peak gate drive source capacity
    • LM74502H: 11-mA peak gate drive source capacity
  • 2.3-A peak gate sink current capacity
  • Enable pin feature
  • 45-µA typical operating quiescent current (EN/UVLO = High)
  • 1-µA shutdown current (EN/UVLO = Low)
  • Adjustable overvoltage and undervoltage protection
  • –40°C to +125°C ambient operating temperature range
  • Available in 8-pin SOT-23 package 2.90 mm × 1.60 mm
  • 3.2-V to 65-V input range (3.9-V start-up)
  • –65-V input reverse voltage rating
  • Integrated charge pump to drive
    • External back-to-back N-Channel MOSFETs
    • External high side switch MOSFET

    • External reverse polarity protection MOSFET

  • Gate drive variants
    • LM74502: 60-µA peak gate drive source capacity
    • LM74502H: 11-mA peak gate drive source capacity
  • 2.3-A peak gate sink current capacity
  • Enable pin feature
  • 45-µA typical operating quiescent current (EN/UVLO = High)
  • 1-µA shutdown current (EN/UVLO = Low)
  • Adjustable overvoltage and undervoltage protection
  • –40°C to +125°C ambient operating temperature range
  • Available in 8-pin SOT-23 package 2.90 mm × 1.60 mm

The LM74502, LM74502H is a controller which operates in conjunction with an external back-to-back connected N-channel MOSFETs to realize a low loss reverse polarity protection and load disconnect solution. The device can also be configured to drive high side MOSFET as a load switch with overvoltage protection . 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 input systems. The device can withstand and protect the loads from negative supply voltages down to –65 V. The LM74502, LM74502H does not have reverse current blocking and is suitable for input reverse polarity protection only.

The LM74502 controller provides a charge pump gate drive for an external N-channel MOSFET. 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. LM74502 and LM74502H offers programmable overvoltage and undervoltage protection which cuts off the load from the input source in case of these fault events. The devices are available in a 2.9 mm × 1.6 mm 8-pin DDF package and are specified over a –40°C to +125°C temperature range.

The LM74502, LM74502H is a controller which operates in conjunction with an external back-to-back connected N-channel MOSFETs to realize a low loss reverse polarity protection and load disconnect solution. The device can also be configured to drive high side MOSFET as a load switch with overvoltage protection . 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 input systems. The device can withstand and protect the loads from negative supply voltages down to –65 V. The LM74502, LM74502H does not have reverse current blocking and is suitable for input reverse polarity protection only.

The LM74502 controller provides a charge pump gate drive for an external N-channel MOSFET. 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. LM74502 and LM74502H offers programmable overvoltage and undervoltage protection which cuts off the load from the input source in case of these fault events. The devices are available in a 2.9 mm × 1.6 mm 8-pin DDF package and are specified over a –40°C to +125°C temperature range.

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類型 標題 日期
* Data sheet LM74502, LM74502H Low IQ High Side Switch Controller with Reverse Polarity and Overvoltage Protection datasheet (Rev. A) PDF | HTML 2022年 5月 6日
User guide LM74502EVM: Evaluation Module for LM74502 and LM74502H Ideal Diode Controllers (Rev. A) PDF | HTML 2021年 12月 20日
Application brief Three Ways to Use High Side Switch Driver Using LM74502 PDF | HTML 2021年 12月 20日
Certificate LM74502EVM EU RoHS Declaration of Conformity (DoC) 2021年 12月 9日

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開發板

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使用指南: PDF | HTML
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開發板

LM74502EVM — 適用於理想二極體控制器的 LM74502 和 LM74502H 評估模組

LM74502EVM 是一款評估模組,可評估具切換輸出、LM74502 和 LM74502H 的理想二極體控制器性能。 LM74502 理想二極體控制器可驅動和控制外部背對背 N 通道 MOSFET,以模擬具電源路徑開啟和關閉控制及過電壓保護的理想二極體整流器。

使用指南: PDF | HTML
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模擬型號

LM74502 PSpice Transient Model

SNOM743.ZIP (57 KB) - PSpice Model
計算工具

FET-INRUSH-SOA-CALC FET SOA margin calculator for dvdt based startup

The design calculator allows user to estimate the FET SOA margin while starting up with dVdt based startup for inrush current control
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PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

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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