參數(shù)資料
型號(hào)： NCP346SN2T1G
廠商： ON SEMICONDUCTOR
元件分類： 電源管理
英文描述： Overvoltage Protection IC
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
封裝： LEAD FREE, TSOT-23, 5 PIN
文件頁(yè)數(shù)： 1/15頁(yè)
文件大?。?/td> 386K
代理商： NCP346SN2T1G
Semiconductor Components Industries, LLC, 2004
December, 2004
Rev. 4
1
Publication Order Number:
NCP346/D
NCP346
Overvoltage Protection IC
The NCP346 Overvoltage Protection circuit (OVP) protects
sensitive electronic circuitry from overvoltage transients and power
supply faults when used in conjunction with an external P
channel
FET. The device is designed to sense an overvoltage condition and
quickly disconnect the input voltage supply from the load before any
damage can occur. The OVP consists of a precise voltage reference, a
comparator with hysteresis, control logic, and a MOSFET gate driver.
The OVP is designed on a robust BiCMOS process and is intended to
withstand voltage transients up to 30 V.
The device is optimized for applications that have an external
AC/DC adapter or car accessory charger to power the product and/or
recharge the internal batteries. The nominal overvoltage thresholds are
4.45 and 5.5 V and can be adjusted upward with a resistor divider
between the V
CC
, IN, and GND pins. It is suitable for single cell
Li
Ion applications as well as 3/4 cell NiCD/NiMH applications.
Features
Overvoltage Turn
Off Time of Less Than 1.0 sec
Accurate Voltage Threshold of 4.45 V and 5.5 V (Nominal)
CNTRL Input Compatible with 1.8 V Logic Levels
These are Pb
Free Devices
Typical Applications
Cellular Phones
Digital Cameras
Portable Computers and PDAs
Portable CD and other Consumer Electronics
+
OUT
IN
V
ref
GND
CNTRL
+
V
CC
Logic
FET
Driver
LOAD
AC/DC Adapter or
Accessory Charger
C1
Schottky
Diode
Microprocessor port
P
CH
Figure 1. Simplified Application Diagram
NCP346
Note: This device contains 89 active transistors
(optional)
(optional)
THIN SOT
23
5
SN SUFFIX
CASE 483
PIN CONNECTIONS &
MARKING DIAGRAM
1
3
IN
OUT
2
GND
CNTRL
4
V
CC
5
(Top View)
xxx = SQZ for NCP346SN1
xxx = SRD for NCP346SN2
Y
= Year
W
= Work Week
Device
Package
Shipping
ORDERING INFORMATION
NCP346SN1T1G SOT
23
5
(Pb
Free)
3000 / Tape & Reel
(7 inch Reel)
x
NCP346SN2T1G
1
5
For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
http://onsemi.com
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