©
Semiconductor Components Industries, LLC, 2011
August, 2011
−
Rev. 3
1
Publication Order Number:
EVBUM2015/D
NCP370GEVB
NCP370 Over Voltage
Protection Controller with
Reverse Charge Control
Evaluation Board User's
Manual
Description
The NCP370 is an overvoltage, overcurrent and reverse control
device. Two main modes are available by setting logic pins.
First mode is Direct Mode from Wall Adapter to the system. In this
mode the system is both positive and negative overvoltage protected
up to +28 V and down to
−
28 V. The wall adapter is disconnected from
the system if the input voltage exceeds the overvoltage (OVLO) or
undervoltage (UVLO) thresholds. At powerup, the Vout turns on
30 ms after the Vin exceeds the undervoltage threshold.
The second mode, called the Reverse Mode, allows an external
accessory to be powered by the system battery or a boost converter.
Here, the external accessory would be connected to the device input
(bottom connector of system) and the device battery would be at the
device output. In this case, overcurrent protection is activated to
prevent accessory faults and battery discharge. Thanks to the NCP370
using an internal NMOS, the system cost and the PCB area of the
application board are minimized. The NCP370 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
m
F or larger capacitor.
Figure 1. NCP370GEVB Board Picture
http://onsemi.com
EVAL BOARD USER’S MANUAL
