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UC2904QTR PDF预览

UC2904QTR

更新时间： 2024-11-26 02:58:39
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
6页 310K
描述
Precision Quad Supply and Line Monitor

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中文翻译

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UC2904QTR 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：QLCC
包装说明：PLASTIC, LCC-20针数：20
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.91
Is Samacsys：N可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-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：85 °C最低工作温度：-40 °C
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最大供电电压 (Vsup)：18 V
最小供电电压 (Vsup)：4.75 V标称供电电压 (Vsup)：15 V
表面贴装：YES技术：BIPOLAR
温度等级：INDUSTRIAL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

UC2904QTR 数据手册

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UC1904  
UC2904  
UC3904  
Precision Quad Supply and Line Monitor  
FEATURES  
DESCRIPTION  
•
Inputs for Monitoring Up to Four  
Supply Voltages  
The UC1904 Quad Supply Monitor will respond to under- and over-volt-  
age conditions on up to four continuously monitored voltage levels. Four  
independent positive voltages can be monitored or, alternatively, two of  
the sense inputs are preset to monitor -5V and -12V supplies. The de-  
vice also monitors Over-Current and Line Sense inputs, both with preci-  
sion input thresholds.  
•
Two Inputs Preset for -5V and -12V  
Monitoring, or Programmable  
Positive Levels  
•
•
Precision 2.5V Reference  
Four open collector outputs on the UC1904 give the following re-  
sponses: 1. The OV/OC output is a latched over-voltage, or over-current  
response. 2. A Power Good signal responds low with any fault detection  
– on power-up a programmable delay is used to hold this output low for  
a system Power On Reset signal. 3. The PWRW output responds only to  
a Line Sense input, for early warning of power failures. 4. The last open  
collector, the ON/OFF output, generates a delayed supply OFF control  
signal in response to an OFF input command, under-voltage condition,  
or line fault detection.  
Separate Inputs for Over-Current and  
Line Fault Sensing  
•
•
•
•
•
Adjustable Under- to Over-Voltage  
Fault Windows  
Latched Over-Voltage and  
Over-Current Output  
Power Good and Power Warning  
Outputs  
The OV-UV fault window is adjustable with a programming input. The  
thresholds are centered around the precision 2.5V reference, with a  
scaled hysteresis for precise, glitch free operation. In the positive mode  
of operation, the fault windows at each of the sense inputs can be inde-  
pendently scaled using external resistors and the 2.5V reference output.  
An Auto Restart function couples with the under-voltage and line sens-  
ing circuits to allow controlled power supply start-up and shutdown.  
Auto Restart Function with ON/OFF  
Control, and Programmable Delay  
Programmable Pwr On Reset Delay  
This device will operate over a supply range of 4.75V to 18V. The device  
is available in a DIP, SOIC, or PLCC outline. This device is ESD pro-  
tected on all pins.  
BLOCK DIAGRAM  
Note: Pin Numbers refer to J, N, and DW Packages.  
4/97  
123456

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