NCP374: Overvoltage Up to +30 V and Down to -30 V with Load Switch Function

The NCP374 is an overvoltage, overcurrent and reverse control device. Two main modes are available by setting logic pins.First mode is Charging Mode from Wall Adapter to the system or from Vbus port to downstream DCDC. 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.The second mode, called the Reverse Mode, allows an external accessory to be powered by the system battery or supply upstream accessory through Vbus port. 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 (externally adjustable) is activated to prevent accessory faults and battery discharge. Thanks to the NCP374 using an internal NMOS, the system cost and the PCB area of the application board are minimized. The NCP374 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

Overvoltage Protection up to 28 V
Overvoltage Protection down to -28 V
On-Chip Low RDS(on) NMOS Transistor: 80 mΩ
Overvoltage and Undervoltage Lockout (OVLO and UVLO)
Alert FLAG(BAR) Output
Logic pins /DIR and /EN
Adjustable Reverse Overcurrent protection up to 750 mA
Soft start

应用

Over-Voltage Protection

终端产品

Mobile Phones, Digital Still Cameras, Personal Media Player, other USB hosts

数据表 (1)

Document Title	Document ID/Size	Revision	Revision Date
Overvoltage Up to +30 V and Down to -30 V with Load Switch Function	NCP374/D (136.0kB)	0

评估板文档 (4)

Document Title	Document ID/Size	Revision	Revision Date
NCP374MU075GEVB Bill Of Materials (ROHS Compliant)	NCP374MU075GEVB_BOM_ROHS.PDF (169kB)	0
NCP374MU075GEVB Gerber Layout Files (Zip Format)	NCP374MU075GEVB_GERBER.ZIP (71kB)	0
NCP374MU075GEVB Schematic	NCP374MU075GEVB_SCHEMATIC.PDF (277kB)	0
NCP374MU075GEVB Test Procedure	NCP374MU075GEVB_TEST_PROCEDURE.PDF (468kB)	0