Pmbus Communication - TDK-Lambda PFH500 Series Instruction Manual

Vo
Vo_nom
Vo1
Vo2
0
Fig. 6-8b Two PFH Modules in Droop Load Share Mode (with
OR-ing Diodes).

6.13 PMBus Communication

The PFH Series module supports PMBus. This allows the host computer to communicate with the PFH module controller to
either read out, command, or set the module(s) operating parameters.
PFH Series module operating status and telemetry can be monitored over the PMBus. PMBus can also be used to modify
some of the operation parameters and/or limit settings, etc. For details, please refer to TDK-Lambda "PFH PMBus
Specification and Application Note".
NOTE: If the PMBus feature set is utilized then an external 2200pF capacitor should be placed from the PMBus_Add1 pin to
SGND and PMBus_Add2 pin to SGND.
REV 2.8 (March 30, 2020)
Controlled Linear Droop
Vo_nom
Io2
Io1
Io_tot
50% of (Io_tot)
Fig 6-9 PMBus Addressing Configuration
Io
Fig. 6-8c Two PFH Modules running 18A Load and then one
(1) PFH module turned Off.
TDK-Lambda
PFH500-SERIES
INSTRUCTION MANUAL
22