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NCP349 - 28V Overvoltage Protection

Description

Pin No.

1, 7 IN INPUT Input Voltage Pins.

DC, Vbus ..).

A 1 mF low ESR ceramic capacitor, or larger, must be connected between these pins and GND, as close as possible to the DUT.

Features

  • Overvoltage Protection up to 28 V.
  • On.
  • Chip Low RDS(on) NMOS Transistor: 65 mW.
  • Internal Charge Pump.
  • Overvoltage Lockout (OVLO).
  • Undervoltage Lockout (UVLO).
  • Soft.
  • Start.
  • Alert FLAG Output.
  • Shutdown EN Input.
  • Compliance to IEC61000.
  • 4.
  • 2 (Level 4) 8.0 kV (Contact) 15 kV (Air).
  • ESD Ratings: Machine Model = B Human Body Model = 2.
  • DFN6 1.6x2 mm Package.
  • This is.

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Datasheet Details

Part number NCP349
Manufacturer ON Semiconductor
File Size 300.56 KB
Description 28V Overvoltage Protection
Datasheet download datasheet NCP349 Datasheet
Additional preview pages of the NCP349 datasheet.

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Full PDF Text Transcription

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NCP349 Positive Overvoltage Protection Controller with Internal Low RON NMOS FET The NCP349 is able to disconnect the systems from its output pin when wrong input operating conditions are detected. The system is positive overvoltage protected up to +28 V. This device uses an internal NMOS and therefore, no external device is necessary, reducing the system cost and the PCB area of the application board. The NCP349 is able to instantaneously disconnect the output from the input, due to integrated Low RON Power NMOS (65 mW), if the input voltage exceeds the overvoltage threshold (OVLO) or falls below the undervoltage threshold (UVLO). At powerup (EN pin = low level), the Vout turns on ton time after the Vin exceeds the undervoltage threshold.
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