ZHCSQT8
October 2023
LM74930-Q1
PRODUCTION DATA
1
1
特性
2
应用
3
说明
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Switching Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Charge Pump
7.3.2
Dual Gate Control (DGATE, HGATE)
7.3.2.1
Load Disconnect Switch Control (HGATE, OUT)
7.3.2.2
Reverse Battery Protection (A, C, DGATE)
7.3.3
Overcurrent Protection (CS+, CS-, ILIM, IMON, TMR)
7.3.4
Overcurrent Protection with Circuit Breaker (ILIM, TMR)
7.3.5
Overcurrent Protection With Latch-Off
7.3.6
Short-Circuit Protection (ISCP)
7.3.6.1
Device Wake-Up With Output Short-Circuit Condition
7.3.7
Analog Current Monitor Output (IMON)
7.3.8
Overvoltage and Undervoltage Protection (OV, UVLO, OVCLAMP)
7.3.9
Disabling Reverse Current Blocking Functionality (MODE)
7.3.10
Device Functional Modes
7.3.10.1
Low Quiescent Current Shutdown Mode (EN)
8
Applications and Implementation
8.1
Application Information
8.2
Typical Application: 200-V Unsuppressed Load Dump Protection Application
8.2.1
Design Requirements for 200-V Unsuppressed Load Dump Protection
8.2.2
Detailed Design Procedure
8.2.2.1
VS Capacitance, Resistor R1 and Zener Clamp (DZ)
8.2.2.2
Charge Pump Capacitance VCAP
8.2.2.3
Input and Output Capacitance
8.2.2.4
Overvoltage and Undervoltage Protection Component Selection
8.2.2.5
Selection of Scaling Resistor (RSET) and Short-Circuit Protection Setting Resistor (RSCP)
8.2.2.6
Overcurrent Limit (ILIM), Circuit Breaker Timer (TMR), and Current Monitoring Output (IMON) Selection
8.2.2.7
Selection of Current Sense Resistor, RSNS
8.2.2.8
Hold-Up Capacitance
8.2.2.9
MOSFET Q1 Selection
8.2.2.10
MOSFET Q2 Selection
8.2.2.11
Input TVS Selection
8.2.3
Application Curves
8.3
Best Design Practices
8.4
Power Supply Recommendations
8.4.1
Transient Protection
8.4.2
TVS Selection for 12-V Battery Systems
8.4.3
TVS Selection for 24-V Battery Systems
8.5
Layout
8.5.1
Layout Guidelines
8.5.2
Layout Example
9
Device and Documentation Support
9.1
接收文档更新通知
9.2
支持资源
9.3
Trademarks
9.4
静电放电警告
9.5
术语表
10
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RGE|24
MPQF124G
散热焊盘机械数据 (封装 | 引脚)
RGE|24
QFND703
订购信息
zhcsqt8_oa
1
特性
符合面向汽车应用的 AEC-Q100 标准
器件温度等级 1:
–40°C 至 +125°C 环境工作温度范围
4V 至 65V 输入范围
反向输入保护低至 –65V
在共源极配置下,可驱动外部背对背 N 沟道 MOSFET
10.5mV 阳极至阴极正向压降调节下,理想二极管正常运行
低反向检测阈值 (-10.5mV),具有快速 DGATE 关断响应 (0.5µs)
18mA 峰值栅极 (DGATE) 导通电流
2.6A 峰值 DGATE 关断电流
可调过流和短路保护
精度为 10% 的模拟电流监视器输出 (IMON)
可调节过压和欠压保护
2.5μA 低关断电流(EN = 低电平)
MODE 引脚可允许双向电流(MODE = 低电平)
采用合适的 TVS 二极管,符合汽车 ISO7637 瞬态要求
采用节省空间的 24 引脚 VQFN 封装
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