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ADM1278-1AACPZ データシート(PDF) 2 Page - Analog Devices |
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ADM1278-1AACPZ データシート(HTML) 2 Page - Analog Devices |
2 / 61 page ADM1278 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Typical Application Circuit ............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 3 Specifications..................................................................................... 4 Power Monitoring Accuracy Specifications.............................. 8 Serial Bus Timing Characteristics.............................................. 8 SPI Timing Characteristics (ADM1278-2) ............................... 9 Absolute Maximum Ratings.......................................................... 10 Thermal Characteristics ............................................................ 10 ESD Caution................................................................................ 10 Pin Configurations and Function Descriptions ......................... 11 Typical Performance Characteristics ........................................... 17 Theory of Operation ...................................................................... 24 Powering the ADM1278............................................................ 24 Hot Swap Current Sense Inputs................................................ 24 Power Monitor Current Sense Inputs...................................... 25 Current-Limit Reference ........................................................... 25 Setting the Current Limit (ISET).............................................. 26 Setting a Linear Output Voltage Ramp at Power-Up............. 26 Start-Up Current Limit.............................................................. 27 Constant Power Foldback.......................................................... 28 Timer............................................................................................ 28 Hot Swap Retry........................................................................... 29 FET Gate Drive Clamps............................................................. 29 Fast Response to Severe Overcurrent ...................................... 29 Undervoltage and Overvoltage................................................. 29 Power Good................................................................................. 29 FAULT Pin................................................................................... 29 ENABLE/ENABLE Input .......................................................... 30 Current Sense Output (CSOUT).............................................. 30 Remote Temperature Sensing ................................................... 30 SPI Interface ................................................................................ 31 VOUT Measurement ..................................................................... 32 FET Health .................................................................................. 32 Power Throttling......................................................................... 32 Power Monitor ............................................................................ 32 PMBus Interface ............................................................................. 34 Device Addressing...................................................................... 34 SMBus Protocol Usage............................................................... 34 Packet Error Checking............................................................... 34 Partial Transactions on I2C Bus................................................ 35 SMBus Message Formats........................................................... 35 Group Commands ..................................................................... 37 Hot Swap Control Commands ................................................. 37 ADM1278 Information Commands........................................ 37 Status Commands ...................................................................... 38 GPO and Alert Pin Setup Commands..................................... 38 Power Monitor Commands ...................................................... 39 Warning Limit Setup Commands............................................ 40 PMBus Direct Format Conversion .......................................... 40 Voltage and Current Conversion Using LSB Values.............. 41 Alert Pin Behavior.......................................................................... 42 Faults and Warnings .................................................................. 42 Generating an Alert ................................................................... 42 Handling/Clearing an Alert...................................................... 42 SMBus Alert Response Address ............................................... 43 Example Use of SMBus ARA.................................................... 43 Digital Comparator Mode......................................................... 43 Typical Application Circuits ..................................................... 43 PMBus Command Reference........................................................ 45 Register Details ............................................................................... 46 Operation Register ..................................................................... 46 Clear Faults Register .................................................................. 46 PMBus Capability Register ....................................................... 46 VOUT OV Warning Limit Register............................................. 46 VOUT UV Warning Limit Register............................................. 47 IOUT OC Warning Limit Register .............................................. 47 OT Fault Limit Register............................................................. 47 OT Warning Limit Register ...................................................... 47 VIN OV Warning Limit Register............................................... 47 VIN UV Warning Limit Register............................................... 48 PIN OP Warning Limit Register ................................................ 48 Status Byte Register.................................................................... 48 Status Word Register.................................................................. 49 VOUT Status Register ................................................................... 50 IOUT Status Register..................................................................... 50 Input Status Register .................................................................. 50 Temperature Status Register ..................................................... 51 Rev. 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同様の部品番号 - ADM1278-1AACPZ |
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同様の説明 - ADM1278-1AACPZ |
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