UC3903

更新时间： 2024-01-31 04:58:34

品牌	Logo	应用领域
德州仪器 - TI		监视器
页数	文件大小	规格书
8页	479K
描述
Quad Supply and Line Monitor

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中文翻译

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技术参数
数据手册
替代型号

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UC3903 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	QLCC
包装说明：	QCCJ, LDCC20,.4SQ	针数：	20
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.7
Is Samacsys：	N	可调阈值：	YES
模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT	JESD-30 代码：	S-PQCC-J20
长度：	8.965 mm	信道数量：	4
功能数量：	1	端子数量：	20
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	QCCJ
封装等效代码：	LDCC20,.4SQ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	4.57 mm
子类别：	Power Management Circuits	最大供电电流 (Isup)：	18 mA
最大供电电压 (Vsup)：	40 V	最小供电电压 (Vsup)：	8 V
标称供电电压 (Vsup)：	15 V	表面贴装：	YES
技术：	BIPOLAR	温度等级：	COMMERCIAL
端子形式：	J BEND	端子节距：	1.27 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	8.965 mm	Base Number Matches：	1

UC3903 数据手册

UC1903

UC2903

UC3903

Quad Supply and Line Monitor

FEATURES

DESCRIPTION

•

Inputs for Monitoring up to Four

Separate Supply Voltage Levels

The UC1903 family of quad supply and line monitor integrated circuits will re-

spond to under- and over-voltage conditions on up to four continuously moni-

tored voltage levels. An internal op-amp inverter allows at least one of these

levels to be negative. A separate line/switcher sense input is available to pro-

vide early warning of line or other power source failures.

Internal Inverter for Sensing a

Negative Supply Voltage

Line/Switch Sense Input for Early

Power Source Failure Warning

The fault window adjustment circuit on these devices provides easy program-

ming of under- and over-voltage thresholds. The thresholds, centered around

a precision 2.5V reference, have an input hysteresis that scales with the win-

dow width for precise, glitch-free operation. A reference output pin allows the

sense input fault windows to be scaled independently using simple resistive

dividers.

Programmable Under- and

Over-Voltage Fault Thresholds

with Proportional Hysteresis

•

A Precision 2.5V Reference

The three open collector outputs on these devices will sink in excess of 30mA

of load current when active. The under- and over-voltage outputs respond af-

ter separate, user defined, delays to respective fault conditions. The third out-

put is active during any fault condition including under- and over-voltage,

line/switcher faults, and input supply under-voltage. The off state of this out-

put indicates a "power OK" situation.

General Purpose Op-Amp for

Auxiliary Use

•

Three High Current, >30mA,

Open-Collector Outputs Indicate

Over-Voltage, Under-Voltage

and Power OK Conditions

An additional, uncommitted, general purpose op-amp is also included. This

op-amp, capable of sourcing 20mA of output current, can be used for a num-

ber of auxiliary functions including the sensing and amplification of a feed-

back error signal when the 2.5V output is used as a system reference.

Input Supply Under-Voltage

Sensing and Start-Latch

Eliminate Erroneous Fault Alerts

During Start-Up

In addition, these ICs are equipped with a start-latch to prevent erroneous un-

der-voltage indications during start-up. These parts operate over an 8V to

40V input supply range and require a typical stand-by current of only 7mA.

8-40V Supply Operation with

7mA Stand-By Current

BLOCK DIAGRAM

Note: Pin numbers refer to J, N and DW packages.

4/97

12 3 4 5 6 7 8

中文翻译

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UC3903 替代型号

型号	品牌	替代类型	描述	数据表
UC2903	TI	功能相似	Quad Supply and Line Monitor
UC3544	TI	功能相似	Power Supply Supervisory Circuit

与UC3903相关器件

型号	品牌	获取价格	描述	数据表
UC3903DW	TI	获取价格	Quad Supply and Line Monitor
UC3903DWG4	TI	获取价格	Quad Supply and Line Monitor
UC3903DWTR	TI	获取价格	Quad Supply and Line Monitor
UC3903DWTRG4	TI	获取价格	Quad Supply and Line Monitor
UC3903J	TI	获取价格	Quad Supply and Line Monitor
UC3903L	ETC	获取价格	Industrial Control IC
UC3903N	TI	获取价格	Quad Supply and Line Monitor
UC3903NG4	TI	获取价格	Quad Supply and Line Monitor
UC3903Q	TI	获取价格	Quad Supply and Line Monitor
UC3903QG3	TI	获取价格	Quad Supply and Line Monitor

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