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參數(shù)資料
| 型號： | NCP345SNT1G |
| 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 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 57K |
| 代理商： | NCP345SNT1G |
Semiconductor Components Industries, LLC, 2004
December, 2004 Rev. 5
1
Publication Order Number:
NCP345/D
NCP345
Overvoltage Protection IC
The NCP345 overvoltage protection circuit (OVP) protects
sensitive electronic circuitry from overvoltage transients and power
supply faults when used in conjunction with an external Pchannel
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 threshold is
6.85 V so it is suitable for single cell LiIon applications as well as 3/4
cell NiCD/NiMH applications.
Features
Overvoltage TurnOff Time of less than 1.0 sec
Accurate Voltage Threshold of 6.85 V (nominal)
Undervoltage Lockout Protection
CNTRL Input Compatible with 1.8 V Logic Levels
PbFree Package is Available
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
Undervoltage
Lock Out
LOAD
AC/DC Adapter or
Accessory Charger
C1
Schottky
Diode
Microprocessor port
PCH
Figure 1. Simplified Application Diagram
NCP345
Note: This device contains 89 active transistors
THIN SOT235
SN SUFFIX
CASE 483
1
5
PIN CONNECTIONS &
MARKING DIAGRAM
1
3
IN
OUT
2
GND
CNTRL
4
VCC
5
(Top View)
Device
Package
Shipping
ORDERING INFORMATION
NCP345SNT1
SOT235
3000 / Tape &
Reel
(7 inch Reel)
R
Y
W
= Year
= Work Week
NCP345SNT1G
SOT235
(PbFree)
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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| NCP346SN1EVB | 功能描述:電源管理IC開發(fā)工具 ANA NCP346 EVAL BD RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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| NCP346SN2T1G | 功能描述:監(jiān)控電路 5.5V Overvoltage Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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