Atec NHResearch-4100 - Manual

DC Electronic Loads
Ultra-Compact, Modular Loads
Model 4100/4110
❑ 300 W, 60 A modules
❑ Up to 6 loads in a 5 1 /
4
-inch
high chassis
❑ Parallelable “virtual” loads
❑ Below 1 volt operation
The Model 4100 and 4110 electronic loads are
designed for use within the S300 Power Subsystem.
These highly versatile loads may be used in any com-
bination together with DC sources within the same
6-slot chassis. The use of such wide-capability modu-
lar loads yields more flexibility, less rack space, and
lower cost than an assortment of loads each having
limited voltage and current range.
BROAD OPERATING ENVELOPE
To cover the full spectrum of supply-under-test output
voltages, the Model 4100 load operates at full current
from 2.1 to 450 V. To meet newer low voltage require-
ments, the Model 4110 load operates down to 0.7 V
and at reduced current down to 0.1 V. In the constant-
current mode, both loads have three ranges in order to
assure the necessary low-end resolution for both set
and measurement values.
PARALLELED “VIRTUAL” LOADS
To address higher power requirements, the same
type (4100 or 4100s) can be paralleled in software
to respond as if they were a single larger load. All
load functions, including slew rate and short-circuit,
are then internally synchronized so that the supply-
under-test sees a single “virtual” load without the
dynamic discontinuities associated with paralleling
older designs. Should the next application require a
different load grouping, reconfiguration is quickly
achieved through reprogramming, thus extending
the system’s flexibility with a minimum of load
modules.
OPERATION BELOW 1 VOLT
With the clear trend toward lower IC voltages,
today’s loads must anticipate tomorrow’s test
requirements. Both the 4100 and the 4110 will oper-
ate below 1 V at reduced current levels, with the
latter being optimized for operation at these very
low voltages.
12