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UCD9081

更新时间： 2024-10-14 12:47:15
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德州仪器 - TI 监控监视器
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34页 853K
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8-CHANNEL POWER SUPPLY SEQUENCER AND MONITOR WITH ERROR LOGGING

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UCD9081 数据手册

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UCD9081  
www.ti.com  
SLVS813B –JUNE 2008–REVISED DECEMBER 2010  
8-CHANNEL POWER SUPPLY SEQUENCER AND MONITOR WITH ERROR LOGGING  
Check for Samples: UCD9081  
1
FEATURES  
•
Microsoft™ Windows™ GUI for Configuration  
and Monitoring  
234  
•
Single Supply Voltage: 3.3V  
•
Low Power Consumption: 3mA Nominal  
Supply Current  
APPLICATIONS  
•
•
•
•
•
•
Telecommunications Switches  
Servers  
•
•
•
•
Sequences and Monitors Eight Voltage Rails  
Rail Voltages Sampled With 3.2-mV Resolution  
Internal or External Voltage Reference  
Networking Equipment  
Test Equipment  
Industrial  
Any System Requiring Sequencing of Multiple  
Voltage Rails  
Four Configurable Digital Outputs for  
Power-On Reset and Other Functions  
•
•
Configurable Digital Output Polarity  
Flexible Rail Sequencing Based On Timeline  
(ms), Parent Rail Regulation Window, Or  
Parent Rail Achieving Defined Threshold  
DESCRIPTION  
The UCD9081 power-supply sequencer controls the  
enable sequence of up to eight independent voltage  
rails and provides four general-purpose digital outputs  
(GPO). The device operates from a 3.3-V supply,  
provides 3.2-mV resolution of voltage rails, and  
requires no external memory or clock. The UCD9081  
monitors the voltage rails independently and has a  
high degree of rail sequence and alarm response  
options. The sequencing of rails can be based on  
timed events or on timed events in conjunction with  
other rails achieving regulation or a voltage threshold.  
In addition, each rail is monitored for undervoltage  
and overvoltage glitches and thresholds. Each rail the  
UCD9081 monitors can be configured to shut down a  
user-defined set of other rails and GPOs, and alarm  
conditions are monitored on a per-rail basis.  
•
•
•
Independent Under- and Overvoltage  
Thresholds Per Rail  
Configurable Regulation Expiration Times Per  
Rail  
Flexible Alarm Processing: Ignore, Log Only,  
Retry n Times, Retry Continuously, Sequence,  
Parent Rail Can Shutdown Child Rails  
•
Alarm Conditions Logged With Timestamp:  
Under- and Overvoltage Glitch, Sustained  
Under- and Overvoltage, Rail Did Not Start  
•
•
On-chip Flash for Storing User Data  
Error Logging to Flash for System Failure  
Analysis  
I2C™ Interface for Configuration and  
Monitoring  
•
Figure  
1
shows the UCD9081 power-supply  
sequencer in a typical application.  
MON [1:8]  
VOUT1  
10 kW  
EN[1:7]  
Power  
Supply  
1
3.3 V  
RST  
XIN  
EN  
EN  
0.01 mF  
3.3 V  
VOUT2  
TEST  
Power  
Supply  
2
UCD9081  
100 kW  
3.3 V  
3.3 V  
3.3 V  
ROSC  
SCL  
VCC  
VSS  
3.3 V  
1 mF  
10 kW  
10 kW  
SDA  
EN8/  
VOUTX  
ADDR1/ ADDR2/ ADDR3/ ADDR4/  
GPO1 GPO2 GPO3 GPO4  
To I2  
Master Device  
C
Power  
Supply  
X
3.3 V  
EN  
A1  
A2  
A3  
A4  
Slave I2  
Address  
C
Digital  
Outputs  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
4
PowerPAD, TMS320 are trademarks of Texas Instruments.  
Microsoft, Windows are trademarks of Microsoft Corporation.  
I2C is a trademark of Phillips Electronics.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008–2010, Texas Instruments Incorporated  
 
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UCD9081 替代型号

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