NCP348中文资料NCP348: Positive Overvoltage Protection Circuit with Internal Low Ron NMOS FET and Status Flag数据手册ONSEMI规格书

描述 Description

The NCP348 is able to disconnect the systems from its output pin in case wrong input operating conditions are detected.The system is positive overvoltage protected up to +28 V.Due to this device using internal NMOS, no external device is necesary, reducing the system cost and the PCB area of the application board.The NCP348 is able to instantaneously disconnect the output from the input, due to integrated Low Ron Power NMOS (80 mΩ, if the input voltage exceeds the overvoltage threshold (6.4 V) or undervoltage threshold, of 3.25 V (UVLO).At powerup (EN(BAR) pin = low level), the Vout turns on 50 ms after the Vin exceeds the undervoltage threshold.The NCP348 provides a negative going flag(FLAG(BAR)) output, which alerts the system that a fault has occurred.In addition, the device has ESD-protected input (15 kV Air) when bypassed with a 1.0 µF or larger capacitor.

特性 Features

Overvoltage Protection up to 28 V
On-Chip Low RDS(on) NMOS Transistor:80 mΩ
Internal Charge Pump
Overvoltage Lockout (OVLO)
Undervoltage Lockout (UVLO)
Internal 50 ms Startup Delay
Alert FLAG(BAR) Output
Shutdown EN(BAR) Input
Compliance to IEC61000-4-2 (Level 4), 8.0 kV (Contact), and 15 kV (Air)
ESD Ratings:Machine Model = B, Human Body Model = 3
This is a Pb-Free Device

应用 Application

Cell Phones, Camera Phones, Digital Still Cameras, Personal Digital Applicaitons, and MP3 Players

简介

NCP348属于电路保护的TVS-混合技术。由制造生产的NCP348TVS - 混合技术混合技术 TVS（瞬态电压抑制器）产品族中的产品属于过压保护产品，其中结合了基于多种技术的保护机制，例如串联连接的 MOV（金属氧化物压敏电阻）和 GDT（气体放电管），旨在同时获得低漏电流和自恢复箝位工作特性。