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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)： | 2/8頁 |
| 文件大?。?/td> | 57K |
| 代理商： | NCP345SNT1G |
NCP345
http://onsemi.com
2
Figure 2. Detailed Block Diagram
+
COMP
CNTRL
(3)
OUT
(1)
GND
(2)
+
UVLO
LOGIC
BLOCK
DRIVER
Pre
regulator
V
CC
(5)
IN
(4)
ON/OFF
OUT
V5
R1
R2
R3
R4
Bandgap
Reference
V
V
CC
PIN FUNCTION DESCRIPTIONS
Pin #
Symbol
Pin Description
1
OUT
This signal drives the gate of a Pchannel MOSFET. It is controlled by the voltage level on IN or the logic state
of the CNTRL input. When an overvoltage event is detected, the OUT pin is driven to within 1.0 V of V
CC
in
less than 1.0 sec provided that gate and stray capacitance is less than 12 nF.
2
GND
Circuit Ground
3
CNTRL
This logic signal is used to control the state of OUT and turnon/off the Pchannel MOSFET. A logic High
results in the OUT signal being driven to within 1.0 V of V
CC
which disconnects the FET. If this pin is not used,
the input should be connected to ground.
4
IN
This pin senses an external voltage point. If the voltage on this input rises above the overvoltage threshold
(VTH), the OUT pin will be driven to within 1.0 V of V
CC
, thus disconnecting the FET. The nominal threshold
level is 6.85 V and this threshold level can be increased with the addition of an external resistor between IN
and V
CC
.
5
V
CC
Positive Voltage supply. If V
CC
falls below 2.8 V (nom), the OUT pin will be driven to within 1.0 V of V
CC
, thus
disconnecting the Pchannel FET.
TRUTH TABLE
IN
CNTRL
OUT
<V
th
L
GND
<V
th
H
V
CC
>V
th
L
V
CC
>V
th
H
V
CC
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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(chǎn)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 |
| NCP346SN1T1G | 功能描述:監(jiān)控電路 4.45V 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| 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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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