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UCC3921 PDF预览

UCC3921

更新时间: 2024-11-07 22:39:59
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
11页 498K
描述
Latchable Negative Floating Hot Swap Power Manager

UCC3921 数据手册

 浏览型号UCC3921的Datasheet PDF文件第2页浏览型号UCC3921的Datasheet PDF文件第3页浏览型号UCC3921的Datasheet PDF文件第4页浏览型号UCC3921的Datasheet PDF文件第5页浏览型号UCC3921的Datasheet PDF文件第6页浏览型号UCC3921的Datasheet PDF文件第7页 
UCC1921  
UCC2921  
UCC3921  
Latchable Negative Floating Hot Swap Power Manager  
FEATURES  
DESCRIPTION  
Precision Fault Threshold  
The UCC3921 family of negative floating hot swap power managers pro-  
vides complete power management, hot swap, and fault handling capa-  
bility. The IC is referenced to the negative input voltage and is powered  
through an external resistor connected to ground, which is essentially a  
current drive as opposed to the traditional voltage drive. The onboard  
10V shunt regulator protects the IC from excess voltage and serves as a  
reference for programming the maximum allowable output sourcing cur-  
rent during a fault. All control and housekeeping functions are integrated  
and externally programmable. These include the fault current level, maxi-  
mum output sourcing current, maximum fault time, selection of Retry or  
Latched mode, soft start time, and average power limiting. In the event of  
a constant fault, the internal timer will limit the on time from less than  
0.1% to a maximum of 3% duty cycle. The duty cycle modulation de-  
pends on the current into PL, which is a function of the voltage across  
the FET, thus limiting average power dissipation in the FET. The fault  
level is fixed at 50mV across the current sense amplifier to minimize total  
Programmable:  
Average Power Limiting, Linear  
Current Control, Overcurrent Limit  
and Fault Time  
Fault Output Indication Signal  
Automatic Retry Mode or Latched  
Operation Mode  
Shutdown Control  
Undervoltage Lockout  
250µs Glitch Filter on the SDFLTCH  
pin  
8-Pin DIL and SOIC  
(continued)  
BLOCK DIAGRAM  
UDG-99052  
3/98  

UCC3921 替代型号

型号 品牌 替代类型 描述 数据表
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