حفاظت مدار محدودکننده‌های ولتاژ گذرا (تی وی اس) فناوری ترکیبی

Product Attributes

Introduction

The NCP347 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 necessary, reducing the system cost and the PCB area of the application board. The NCP347 is able to instantaneously disconnect the output from the input, due to integrated Low RON Power NMOS (65 mΩ), if the input voltage exceeds the overvoltage threshold (OVLO) or undervoltage threshold (UVLO). At powerup (EN pin = low level), the Vout turns on 50 ms after the Vin exceeds the undervoltage threshold. The NCP347 provides a negative going flag (FLAG) 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.

Features

• Overvoltage Protection up to 28 V
• On−Chip Low RDS(on) NMOS Transistor: 65 mΩ
• Internal Charge Pump
• Overvoltage Lockout (OVLO)
• Undervoltage Lockout (UVLO)
• Internal 50 ms Startup Delay
• Alert FLAG Output
• Shutdown EN Input
• Compliance to IEC61000−4−2 (Level 4) 8.0 kV (Contact) 15 kV (Air)
• ESD Ratings: Machine Model μ = B Human Body Model = 3
• 10 Lead WDFN 2.5x2 mm Package
• This is a Pb−Free Device

Applications

• Cell Phones
• Camera Phones
• Digital Still Cameras
• Personal Digital Applications
• MP3 Players