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LoadSlammer
TM
DJT090 parallel EVMs supports LoadSlammer
TM
. Simply plug LoadSlammer
TM
to the socket can
achieve transient analysis. Refer to
for details or consult local ABB FAEs
for more info.
CHANNEL REDUCTION
ABB supplies 4 and 8 parallel EVM by default. If 2,3,5,6,7 DJT090 operation is desired, PMBus
reconfiguration is a must and board modification is recommended. Each channel contains an output
shunt resistor. By removing the shunt resistor, the associated DJT090 and its output capacitors will
be disconnected to the loading point. Although PMBus command can be used to disable the unused
channel, the existence of the unused DJT090 and its capacitance can potentially cause unwanted
oscillation since all DJT090 and its output capacitance are shared a common point of load. Thus, use
below table as a guide to disconnect unused channels. (Mismatched output
impedance doesn’t
affect current sharing capability but has an impact for transient performance).
Number of DJT090 to parallel
EVM to use
Suggested channel(s) to disconnect
3
4-channel
3 or 6 or 7
5
8-channel
4,5,8
6
8-channel
4,8
7
8-channel
8
Transient @Vin=12V, Vout=1.2V, 180A DC Load + 332A@360A/us Pulse Load
Icheck1, ignore noise
Vout
