Datasheet > UC1903Q

UC1903Q

更新时间： 2024-11-13 23:38:51

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
8页	506K
描述
Industrial Control IC

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UC1903Q 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

下载PDF

与UC1903Q相关器件

型号	品牌	获取价格	描述	数据表
UC1903QTR	ETC	获取价格	Industrial Control IC
UC1904	TI	获取价格	Precision Quad Supply and Line Monitor
UC1904_08	TI	获取价格	Precision Quad Supply and Line Monitor
UC1904DW	TI	获取价格	UC1904DW
UC1904DWTR	ETC	获取价格	Analog IC
UC1904J	TI	获取价格	4-CHANNEL POWER SUPPLY SUPPORT CKT, CDIP18, CERAMIC, DIP-18
UC1904N	TI	获取价格	UC1904N
UC1904Q	TI	获取价格	UC1904Q
UC1904QTR	ETC	获取价格	Analog IC
UC1907	TI	获取价格	Load Share Controller