Product Overview

Product Overview
NCP391: Positive Overvoltage Protection Controller with Internal Low RON
NMOS FET
For complete documentation, see the data sheet
Product Description
The NCP391 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 NCP391 is able to instantaneously disconnect the output from the input, due to integrated Low Ron Power NMOS (120 mΩ, if
the input voltage exceeds the overvoltage threshold (OVLO) or undervoltage threshold (UVLO)).
At powerup (EN(BAR) pin = low level), the Vout turns on ton after the Vin exceeds the undervoltage threshold.
The NCP391 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.
Features
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Benefits
Overvoltage Protection up to 28 V
On-Chip Low RDS(on) NMOS Transistor: 120 mΩ
Overvoltage Lockout (OVLO)
Undervoltage Lockout (UVLO)
Internal Soft start
Alert FLAG(BAR) Output
Shutdown EN(BAR) Input
ESD Ratings: Machine Model = B, Human Body Model = 3
Applications
• Low voltage battery charger can be used
• No external pass Mosfet is required
End Products
• Over-Voltage Protection
• Cell Phones, Camera Phones, Digital Still Cameras, PDA,
Tablet, Wireless accessory and MP3 Players
Part Electrical Specifications
Product
Compliance
Status
VCC Min
(V)
VCC Max
(V)
P(AV) Max
(W)
VIT+ Typ
(V)
VIT Typ (V) IDDH Max
(µA)
TA Min
(°C)
TA Max
(°C)
Package
Type
NCP391FCALT2G
Pb-free
Active
1.2
28
0.69
7.4
7.3
170
40
125
WLCSP-6
Active
1.2
28
0.69
7.4
7.3
170
40
125
WLCSP-6
Halide free
NCP391FCCADT2G
Pb-free
Halide free
Application Diagram
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016