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ADM1275-1ARQZ-R7 데이터시트(PDF) 2 Page - Analog Devices

부품명 ADM1275-1ARQZ-R7
상세설명  Hot-Swap Controller and Digital Power
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ADM1275-1ARQZ-R7 데이터시트(HTML) 2 Page - Analog Devices

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ADM1275
Data Sheet
Rev. D | Page 2 of 48
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Applications Diagram ...................................................................... 1
General Description......................................................................... 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
Serial Bus Timing Characteristics.............................................. 7
Absolute Maximum Ratings............................................................ 8
Thermal Characteristics .............................................................. 8
ESD Caution.................................................................................. 8
Pin Configurations and Function Descriptions ........................... 9
Typical Performance Characteristics ........................................... 14
Functional Block Diagrams........................................................... 20
Theory of Operation ...................................................................... 21
Powering the ADM1275............................................................ 21
Current Sense Inputs.................................................................. 21
Current Limit Reference............................................................ 22
Setting the Current Limit (ISET) ............................................. 22
Soft Start ...................................................................................... 23
Foldback....................................................................................... 23
Timer............................................................................................ 24
Hot-Swap Retry Duty Cycle...................................................... 24
FET Gate Drive Clamps............................................................. 24
Fast Response to Severe Overcurrent ...................................... 25
Undervoltage and Overvoltage................................................. 25
ENABLE Input (ADM1275-3 Only)........................................ 25
Power Good................................................................................. 25
VOUT Measurement ................................................................. 26
FET Health .................................................................................. 26
Power Monitor ............................................................................ 26
PMBus Interface ............................................................................. 27
Device Addressing...................................................................... 27
SMBus Protocol Usage............................................................... 27
Packet Error Checking............................................................... 27
Partial Transactions on I2C Bus................................................ 27
SMBus Message Formats........................................................... 28
Group Commands ..................................................................... 29
Hot-Swap Control Commands................................................. 30
ADM1275 Information Commands........................................ 30
Status Commands ...................................................................... 30
GPO and Alert Pin Setup Commands .................................... 31
Power Monitor Commands ...................................................... 31
Warning Limit Setup Commands............................................ 32
PMBus Direct Format Conversion .......................................... 32
Voltage and Current Conversion using LSB values ............... 33
ADM1275 Alert Pin Behavior ...................................................... 34
Faults and Warnings .................................................................. 34
Generating an Alert ................................................................... 34
Handling/Clearing an Alert...................................................... 34
SMBus Alert Response Address ............................................... 35
Example Use of SMBus Alert Response Address................... 35
PMBus Command Reference........................................................ 36
OPERATION .............................................................................. 37
CLEAR_FAULTS........................................................................ 37
CAPABILITY.............................................................................. 37
VOUT_OV_WARN_LIMIT..................................................... 37
VOUT_UV_WARN_LIMIT..................................................... 37
IOUT_OC_WARN_LIMIT ...................................................... 37
IOUT_WARN2_LIMIT............................................................. 38
VIN_OV_WARN_LIMIT......................................................... 38
VIN_UV_WARN_LIMIT......................................................... 38
STATUS_BYTE .......................................................................... 38
STATUS_WORD........................................................................ 39
STATUS_VOUT......................................................................... 39
STATUS_IOUT .......................................................................... 39
STATUS_INPUT........................................................................ 40
STATUS_MFR_SPECIFIC........................................................ 40
READ_VIN................................................................................. 40
READ_VOUT............................................................................. 41
READ_IOUT .............................................................................. 41
PMBUS_REVISION .................................................................. 41


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