ADM1075 Просмотр технического описания (PDF) - Analog Devices

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ADM1075

−48 V Hot Swap Controller and Digital Power Monitor with PMBus Interface

Analog Devices 

ADM1075

Data Sheet

TABLE OF CONTENTS

Features .............................................................................................. 1

Group Commands ..................................................................... 30

Applications....................................................................................... 1

Hot Swap Control Commands ................................................. 31

Product Highlights ........................................................................... 1

ADM1075 Information Commands........................................ 31

Functional Block Diagram .............................................................. 1

Status Commands ...................................................................... 31

Revision History ............................................................................... 3

GPO and Alert Pin Setup Commands..................................... 32

General Description ......................................................................... 4

Power Monitor Commands ...................................................... 32

Specifications..................................................................................... 5

Warning Limit Setup Commands ............................................ 33

Serial Bus Timing ......................................................................... 9

PMBus Direct Format Conversion .......................................... 34

Absolute Maximum Ratings.......................................................... 10

Voltage and Current Conversion Using LSB Values.............. 35

Thermal Resistance .................................................................... 10

ADM1075 Alert Pin Behavior ...................................................... 36

ESD Caution................................................................................ 10

Faults and Warnings .................................................................. 36

Pin Configuration and Function Description ............................ 11

Generating an Alert ................................................................... 36

Typical Performance Characteristics ........................................... 13

Handling/Clearing an Alert ...................................................... 36

Theory of Operation ...................................................................... 20

SMBus Alert Response Address ............................................... 37

Powering the ADM1075 ............................................................ 20

Example Use of SMBus Alert Response Address ................... 37

Current Sense Inputs.................................................................. 21

Digital Comparator Mode......................................................... 37

Current Limit Reference ............................................................ 21

PMBus Command Reference........................................................ 38

Setting the Current Limit (ISET).............................................. 22

Register Details ............................................................................... 39

Soft Start ...................................................................................... 22

Operation Command Register ................................................. 39

Constant Power Foldback (PLIM) ........................................... 22

Clear Faults Register .................................................................. 39

TIMER ......................................................................................... 23

PMBus Capability Register ....................................................... 39

Setting a Linear Output Voltage Ramp at Power-Up............. 24

IOUT OC Warn Limit Register ................................................ 39

Hot Swap Fault Retry ................................................................. 25

VIN OV Warn Limit Register................................................... 39

Fast Response to Severe Overcurrent ...................................... 25

VIN UV Warn Limit Register................................................... 39

UV and OV ................................................................................. 25

PIN OP Warn Limit Register .................................................... 40

PWRGD ....................................................................................... 25

Status Byte Register .................................................................... 40

DRAIN ......................................................................................... 26

Status Word Register.................................................................. 40

SPLYGD ....................................................................................... 26

IOUT Status Register ................................................................. 41

LATCH......................................................................................... 26

Input Status Register .................................................................. 41

SHDN ........................................................................................... 26

Manufacturing Specific Status Register................................... 42

RESTART..................................................................................... 26

Read EIN Register ...................................................................... 43

FET Health .................................................................................. 26

Power Monitor ............................................................................ 26

Isolation ....................................................................................... 27

PMBus Interface ............................................................................. 28

Device Addressing...................................................................... 28

SMBus Protocol Usage ............................................................... 28

Packet Error Checking ............................................................... 28

Partial Transactions on I2C Bus ................................................ 28

SMBus Message Formats ........................................................... 29

Read VIN Register...................................................................... 43

Read IOUT Register................................................................... 43

Read PIN Register ...................................................................... 43

PMBus Revision Register .......................................................... 43

Manufacturing ID Register ....................................................... 44

Manufacturing Model Register ................................................ 44

Manufacturing Revision Register............................................. 44

Peak IOUT Register ................................................................... 44

Peak VIN Register ...................................................................... 45

Rev. D | Page 2 of 52

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