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PMBus Interface: User’s Guide

XL270 Series

270-Watt AC to DC

Power Supplies

706679 Rev 09-26-18

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Summary of Contents for XL270 Series

Page 1: ...PMBus Interface User s Guide XL270 Series 270 Watt AC to DC Power Supplies 706679 Rev 09 26 18...

Page 2: ...us org media PMBus_Specification_Part_II_Rev_1_0_20050328 pdf The PMBus is a logical protocol based on the SMBus that was originally conceived by Intel Corporation They both utilize the 5 volt I2 C ha...

Page 3: ...part numbers for the mating housing and crimp style snap in terminals are listed in Table 2 There may be equivalent connector components available from other manufacturers J6 Molex P N Number of Circ...

Page 4: ...ring and service use CAN LOW LOW data line for CAN Controller area Network communications for current sharing and service use RS Remote sense for RTN RS Remote sense for VOUT compensates for load cabl...

Page 5: ...t Sharing J3 10 CAN Low CANL for Current Sharing J3 11 Negative Remote Sense RS J3 12 Positive Remote Sense RS J3 13 Power Fail Power Good PF PG J3 14 Remote Enable ENABLE J3 15 Not used Table 4 J3 Pi...

Page 6: ...esses These are determined by selectively grounding the two high true address input lines shown in Table 4 Leaving the address pins open will be treated as logic high J3 3 A1 J3 4 A0 Address Open Open...

Page 7: ...Part II for detailed descriptions of the following supported commands OPERATION 0x01 An OPERATION command will cause the OPERATION byte to be written if the data is valid but the command will only be...

Page 8: ...UT Not supported 4 MFR Not supported 3 POWER_GOOD The POWER_GOOD negation has occurred 2 FANS Not supported 1 OTHER Not supported 0 UNKNOWN Not supported Table 8 Status Byte Word Description READ_VOUT...

Page 9: ...data value of 930d The parameters used to translate the data to the actual temperature information are given below Parameter Value m 620d b 24800d R 2d Table 11 PMBus direct format coefficient paramet...

Page 10: ...modulating the fan power then the returned tachometer pulse count per second value is only valid when the fan is powered at 100 duty cycle continuous power A fan with an open collector tachometer outp...

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