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LTM2987

更新时间： 2023-12-20 18:46:23
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 887K
描述
16 通道 μModule PMBus 电源系统管理器

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LTM2987 数据手册

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LTM2987  
16-Channel µModule PMBus  
Power System Manager  
FEATURES  
DESCRIPTION  
The LTM®2987 is a 16-channel µModule® (micromodule)  
Power System Manager used to sequence, trim (servo),  
margin, supervise, manage faults, provide telemetry and  
create fault logs. PMBus commands support power sup-  
ply sequencing, precision point-of-load voltage adjustment  
and margining. DACs use a proprietary soft-connect algo-  
rithm to minimize supply disturbances. Supervisory func-  
tions include overvoltage and undervoltage threshold limits  
for sixteen power supply output channels and two power  
supply input channels, as well as over and under tempera-  
ture limits. Programmable fault responses can disable the  
power supplies with optional retry after a fault is detected.  
Faults that disable a power supply can automatically trig-  
ger black box EEPROM storage of fault status and associ-  
ated telemetry. An internal 16-bit ADC monitors sixteen  
output voltages, two input voltages, and die temperature.  
In addition, odd numbered channels can be configured  
to measure the voltage across a current sense resistor. A  
programmable watchdog timer monitors microprocessor  
activity for a stalled condition and resets the microproces-  
sor if necessary. A single wire bus synchronizes power  
supplies across multiple LTC Power System Management  
(PSM) devices. Configuration EEPROM with ECC supports  
autonomous operation without additional software.  
n
Sequence, Trim, Margin and Supervise 16 Power  
Supplies  
n
Manage Faults, Monitor Telemetry and Create Fault  
Logs  
n
PMBus™ Compliant Command Set  
Supported by LTpowerPlay® GUI  
n
n
Margin or Trim Supplies to Within 0.25% of Target  
n
Fast OV/UV Supervisors Per Channel  
n
Coordinate Sequencing and Fault Management  
Across Multiple LTC PSM Devices  
n
Automatic Fault Logging to Internal EEPROM  
n
Operate Autonomously without Additional Software  
n
Internal Temperature and Input Voltage Supervisors  
n
Accurate Monitoring of 16 Output Voltages, Two  
Input Voltages and Internal Die Temperature  
2
n
I C/SMBus Serial Interface  
n
Can Be Powered from 3.3V, or 4.5V to 15V  
n
Programmable Watchdog Timer  
n
Available in 144-Pin 15mm × 15mm BGA Package  
APPLICATIONS  
n
Computers and Network Servers  
n
Industrial Test and Measurement  
n
High Reliability Systems  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. Patents including 7382303, 7420359 and 7940091.  
n
Medical Imaging  
n
Video  
TYPICAL APPLICATION  
16-Channel PMBus Power System Manager  
Power Supply Accuracy  
20  
IBC  
IN OUT  
EN  
46 PARTS SOLDERED DOWN  
4.5V ≤ V  
IBUS  
≤ 15V  
18  
16  
14  
DC  
IN  
V
V
IN  
IN_SNS  
V
OUT  
DC/DC  
CONVERTER  
RUN  
V
IN_EN  
+
SENSE  
–
* LTM2987 MAY ALSO BE  
POWERED DIRECTLY FROM  
AN EXTERNAL 3.3V SUPPLY  
12  
10  
8
V
*
PWR  
V
*
V
LOAD  
DD33  
V
FB  
LTM2987  
6
R20  
SDA  
4
V
DAC  
SCL  
2
PMBus  
INTERFACE  
R30  
ALERTB  
CONTROL  
FAULT  
R10  
0
–0.25  
0.05  
ERROR (%)  
0.15  
0.25  
–0.15  
–0.05  
2987 TA01b  
V
PWRGD  
OUT_EN  
NOTE: SOME DETAILS OMITTED FOR CLARITY  
ONLY ONE OF 16 CHANNELS SHOWN  
2987 TA01a  
Rev B  
1
Document Feedback  
For more information www.analog.com  
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