“Current-Ramping” is a process to control the current increase slew rate, in a stepwise manner.
This feature is pragmatic for application where the power source prior to the DCDC converter
might not be able to provide/discharge its full power instantaneously (such as fuel cells) and
requires time to meet that capacity. This also support smoothening the transition between
multiple power sources.
The current ramping rate is configurable,
Ramping function can be set to
Active
or
Non-active
(configurable through setting)
Step length resolution =
500ms
(fixed)
Step height resolution =
500mA
∼
10000mA
/ 500ms (configurable through setting)
(Range given as 1A/s to 20A/s)
Refer to “Output Current Ramping Setting (active & non-active)” in the appendix for setup guide.
When operating with an active Current-Ramping program, it is necessary to have
an
auxiliary power source
(Aux_P_out)
, in parallel to the Cerebral-55 output
(P_out)
.
The auxiliary power must be there to support the full power demand from the load,
while the Cerebral-55 ramps up its power output.
See example on next slide.
CHAPTER 3 | OPERATING CEREBRAL-55
P_out: 72V, > 10A
Aux_P_out: 72V, > 10A
Source
CEREBRAL-55
Aux Source
LOAD
72V, 10A
> 720W
3.5 CURRENT-RAMPING
