LTC2971 2-Channel 60V Power System Manager FEATURES DESCRIPTION n Sequence, Trim, Margin, Supervise, Manage and The LTC 2971, LTC2971-1, LTC2971-2, and LTC2971-3 are Log Faults, and Monitor Telemetry of Two 2-channel high voltage Power System Managers used to PowerSupplies sequence, trim (servo), margin, supervise, manage faults, n Monitor Input Voltage from 0V to 60V, Input Current provide telemetry and log faults. DACs use a proprietary to Within 1%, and Accumulate Energy soft-connect algorithm to minimize supply disturbances. n Manage Outputs from 60V to 60V and Margin or Supervisory functions include over and under voltage Trim to within 0.25% and temperature threshold limits for two power supply 2 n 1.8V to 3.3V PMBus/SMBus/I C Compliant Serial output channels and one input channel. Programmable Interface fault responses can disable the power supplies, config- n Supported by LTpowerPlay GUI ure retry, and trigger black box EEPROM storage of fault n Coordinate Sequencing and Fault Management status and associated telemetry. An internal 16-bit ADC Across Multiple ADI PSM Devices monitors two output voltages, two output currents, two n Operate Autonomously Without Additional Software external temperatures, input voltage and current, and die n Connect Directly to Regulator IMON Pins temperature. Input power, energy, and output power are n Can Be Powered from 3.3V, or 4.5V to 60V also calculated. A programmable watchdog timer monitors n Available in a 49-Pin 7mm 7mm BGA Package microprocessor activity and resets if necessary. A single wire bus synchronizes power supplies across multiple ADI APPLICATIONS Power System Management (PSM) devices. Configura- n tion EEPROM with ECC supports autonomous operation Computers and Network Servers n without additional software. Industrial Test and Measurement n All registered trademarks and trademarks are the property of their respective owners. Protected High Reliability Systems by U.S. Patents including 7382303, 7420359, 8648623 and8920026. n Video and Medical Imaging TYPICAL APPLICATION OPTION CHANNEL 0 CHANNEL 1 LTC2971 0V TO 60V 0V to 60V LTC2971-1 0V TO 60V 60V to 0V IBC 24V DC IN OUT IN LTC2971-2 60V to 0V 60V to 0V LTC2971-3 0V to 60V 0V to 1.8V ALERTB PMBus SCL INTERFACE CONTROL Closed-Loop Servo Error vs Temperature SDA FAULT V * DD33 0.25 PWRGD V 10 PARTS SOLDERED DOWN LTC2971-1 DDIO R11A 0.20 V = 10V I V OUT SNSP0 DAC1 IN V IN RSNS I 0.15 OUT SNSM0 R11 V OUT V IN G NDSNS1 0.10 POSITIVE FBX RUN V OUT SNS0 OUTPUT NEGATIVE LOAD 0.05 R21 DC/DC R20 OUTPUT LOAD CONVERTER DC/DC V OUT SNS1 0.00 G RUN FB NDSNS0 RSNS CONVERTER V OUT 0.05 R10 I OUT SNSP1 V DAC0 I OUT SNSM1 0.10 R30 V V OUT EN0 OUT EN1 0.15 PG0 PG1 T T 0.20 SENSE0 SENSE1 * LTC2971 MAY ALSO BE POWERED DIRECTLY FROM 0.25 AN EXTERNAL 3.3V SUPPLY 50 25 0 25 50 75 100 125 2971 TA01a NOTE: SOME DETAILS OMITTED FOR CLARITY TEMPERATURE (C) 2971 TA01b Rev. 0 1 Document Feedback For more information www.analog.com V IN SNS V * PWR I IN SNSP I IN SNSM ERROR (% OF READING)LTC2971 TABLE OF CONTENTS Features ............................................................................1 VIN ON, VIN OFF, VIN OV FAULT LIMIT, VIN OV WARN Applications .......................................................................1 LIMIT, VIN UV WARN LIMIT and Typical Application ...............................................................1 VIN UV FAULT LIMIT ................................................................. 50 Description.........................................................................1 Input Voltage Commands and Limits ................................................ 50 Absolute Maximum Ratings .....................................................4 Input Current and Energy ...................................................................51 Pin Configuration .................................................................4 Energy Measurement and Reporting ............................................51 Order Information .................................................................5 MFR EIN ......................................................................................51 Electrical Characteristics ........................................................5 MFR EIN CONFIG ....................................................................... 52 PMBus Timing Diagram ........................................................ 13 MFR IIN CAL GAIN ................................................................... 53 Typical Performance Characteristics ........................................ 14 MFR IIN CAL GAIN TC ............................................................. 53 Pin Functions .................................................................... 18 MFR CLEAR ENERGY ................................................................ 53 Block Diagram ................................................................... 20 Output Voltage Commands and Limits.............................................. 54 Operation......................................................................... 21 VOUT MODE ................................................................................ 55 VOUT COMMAND, VOUT MAX, VOUT MARGIN HIGH, VOUT LTC2971 Operation Overview ............................................................ 21 MARGIN LOW, VOUT OV FAULT LIMIT, EEPROM ....................................................................................... 22 VOUT OV WARN LIMIT, VOUT UV WARN LIMIT, VOUT UV AUXFAULTB ....................................................................................... 22 FAULT LIMIT, POWER GOOD ON and RESETB .............................................................................................. 22 POWER GOOD OFF .................................................................... 55 V DDIO .....................................................................................................................23 MFR VOUT DISCHARGE THRESHOLD ...................................... 55 PMBus Serial Digital Interface .......................................................... 23 MFR DAC STARTUP ................................................................... 55 PMBus .......................................................................................... 23 MFR DAC ..................................................................................... 56 Device Address ............................................................................ 23 Output Current Commands and Limits .............................................. 56 Processing Commands ................................................................ 24 IOUT CAL GAIN and IOUT CAL OFFSET .................................. 56 Addressing and Write Protect ........................................................... 33 IOUT OC WARN LIMIT .............................................................. 57 PAGE ............................................................................................ 33 MFR IOUT CAL GAIN TC .......................................................... 57 WRITE PROTECT ........................................................................ 34 External Temperature Commands and Limits ................................... 57 WRITE PROTECT Pin ................................................................... 34 OT FAULT LIMIT, OT WARN LIMIT, UT WARN LIMIT and MFR PAGE FF MASK ................................................................. 35 UT FAULT LIMIT ......................................................................... 58 MFR I2C BASE ADDRESS ........................................................ 35 MFR TEMP 1 GAIN and MFR TEMP 1 OFFSET ....................... 58 MFR COMMAND PLUS .............................................................. 35 MFR T SELF HEAT, MFR IOUT CAL GAIN TAU INV and MFR MFR DATA PLUS0 and MFR DATA PLUS1 .............................. 35 IOUT CAL GAIN THETA ............................................................. 58 MFR STATUS PLUS0, and MFR STATUS PLUS1 .................... 35 Sequencing Timing Limits and Clock Sharing................................... 60 Reading Fault Log Using Command Plus and MFR DATA PLUS0 . TON DELAY, TON RISE, TON MAX FAULT LIMIT and TOFF 36 DELAY .......................................................................................... 60 Reading Energy Using MFR COMMAND PLUS and MFR DATA MFR RESTART DELAY ............................................................... 61 PLUS0 .......................................................................................... 37 Clock Sharing ............................................................................... 61 Peek Operation Using MFR DATA PLUS0 .................................. 37 Watchdog Timer and Power Good ..................................................... 61 Enabling and Disabling Poke Operations ..................................... 37 MFR PG CONFIG ........................................................................ 62 Poke Operation Using Mfr data plus0 ....................................... 38 MFR PG GPO ............................................................................. 64 Command Plus Operations Using MFR DATA PLUS1 ............... 38 MFR PWRGD EN ........................................................................ 64 On/Off Control, Margining and Configuration ................................... 38 MFR POWERGOOD ASSERTION DELAY .................................. 64 OPERATION .................................................................................. 39 Watchdog Operation .................................................................... 65 ON OFF CONFIG ......................................................................... 40 MFR WATCHDOG T FIRST and MFR WATCHDOG T ............... 65 MFR CONFIG LTC2971 .............................................................. 40 Fault Responses ................................................................................ 65 Cascade Sequence ON with Time-Based Sequence OFF ............. 42 Clearing Latched Faults ............................................................... 66 MFR CONFIG2 LTC2971 ............................................................ 43 VOUT OV FAULT RESPONSE and VOUT UV FAULT RESPONSE MFR CONFIG3 LTC2971 ............................................................ 43 66 Tracking Supplies On and Off ...................................................... 44 OT FAULT RESPONSE, UT FAULT RESPONSE, VIN OV FAULT Tracking Implementation ............................................................. 44 RESPONSE and VIN UV FAULT RESPONSE.............................. 67 MFR CONFIG ALL LTC2971...................................................... 46 TON MAX FAULT RESPONSE ................................................... 67 Programming User EEPROM Space .................................................. 48 MFR RETRY DELAY ................................................................... 68 STORE USER ALL and RESTORE USER ALL .......................... 48 MR RETRY COUNT .................................................................... 68 MFR EE UNLOCK ....................................................................... 49 Shared External Faults ....................................................................... 69 MFR EE ERASE .......................................................................... 49 MFR FAULTB0 PROPAGATE and MFR FAULTB1 PROPAGATE 69 MFR EE DATA ............................................................................. 49 MFR FAULTB0 RESPONSE and MFR FAULTB1 RESPONSE ... 69 Response When Part Is Busy....................................................... 50 Fault Warning and Status .................................................................. 70 MFR EE Erase and Write Programming Time ............................. 50 Rev. 0 2 For more information www.analog.com