Specifications

72
Properly powering on and off your DUT
with the APS
If you work with DUTs that have
multiple power supply inputs, such
as satellite payloads, you often need
to properly sequence on or off each
power supply at strict repeatable
times to prevent current surges and
latchup conditions. In addition to
sequencing on or off each supply,
you may need to set the ramp rate
of each supply at turn-on or turn-off
to a particular rate. These require-
ments add significant complexity to
an ATE test system, both in hard-
ware and software. The APS power
supplies can help you overcome this
test challenge by providing built-in
sequencing capability across APS
mainframes or with Agilent’s popular
N6700 family of modular system
power supplies. Also, the APS power
supplies provide adjustable slew
rate control at turn-on or turn-off.
These built-in capabilities provide
a clean low-complexity way to
properly power-on or off your
DUT during test.
Add power flexibility to your test system
by paralleling multiple APS supplies
Paralleling multiple power supplies
together is a great way to add power
flexibility to your test system. The
down side of paralleling power sup-
plies together is typically you cannot
get all the supplies to operate in the
desired constant voltage (CV) or
constant current (CC) mode. For
instance, when trying to operate in
CV mode with two parallel supplies,
one will typically source the bulk of
the current and operate in CC mode
and the other supply will source only
a fraction of the current and operate
in CV mode. This condition can
highly degrade certain power supply
performance specifications such as
transient response.
Single Output: 1 & 2 KW GPIB, LAN (LXI Core), USB
(Continued)
Specifications
(at 0° to 55°C unless
otherwise specified)
More detailed specifications at www.agilent.com/find/N7900
Advanced Power System DC power supplies overcome the toughest power test challenges
N7970A N7971A N7972A N7973A N7974A
Number of outputs 1 1 1 1 1
GPIB, LAN, USB Yes Yes Yes Yes Yes
DC ratings
Voltage source 0 to 9 V 0 to 20 V 0 to 40 V 0 to 60 V 0 to 80 V
Current source 0 to 200 A 0 to 100 A 0 to 50 A 0 to 33.3 A 0 to 25 A
Current sink 10% rating -20 A -10 A -5 A -3.33 A -2.5 A
Current sink 100% rating
1
-200 A -100 A -50 A -33.3 A -25 A
Power
2
1800 W 2000 W 2000 W 2000 W 2000 W
Output ripple and noise
3
CV rms 1 mV 1 mV 1 mV 1 mV 1 mV
CV peak to peak 9 mV 9 mV 9 mV 9 mV 9 mV
Load regulation
Voltage 0.5 mV 0.75 mV 1.5 mV 2 mV 2 mV
Current 15 mA 6 mA 1.5 mA 1.5 mA 1.5 mA
Voltage programming & measurement accuracy
4, 5, 6
Lead drop ≤1 V max 0.03% + 1 mV 2 mV 4 mV 6 mV 8 mV
Lead drop ≤25% of V rating 0.03% + 1.4 mV 3 mV 5.9 mV 9 mV 12 mV
Current programming & measurement accuracy
4
0.04% + 30 mA 15 mA 8 mA 5 mA 4 mA
Current measurement low range accuracy
0.05% + 6 mA 2 mA 1.2 mA 0.6 mA 0.5 mA
Transient response
7
Recovery time 100 µs 100 µs 100 µs 100 µs 100 µs
Settling band 150 mV 150 mV 100 mV 150 mV 200 mV
Supplemental Characteristics (Non-warranted characteristics determined by design
that are useful in applying the product)
Programming range
Voltage 0.009 to 0.02 to 0.04 to 0.06 to 0.08 to
9.18 V 20.4 V 40.8 V 61.2 V 81.6 V
Current (no dissipator) -20.4 to -10.2 to -5.1 to -3.4 to -2.55 to
204 A 102 A 51 A 34 A 25.5 A
Current (with dissipator) -204 to -102 to -51 to -34 to -25.5 to
204 A 102 A 51 A 34 A 25.5 A
Programming resolution
Voltage 0.21 mV 0.42 mV 0.84 mV 1.25 mV 1.68 mV
Current 3.8 mA 1.9 mA 0.95 mA 0.64 mA 0.48 mA
Notes:
1
Current sinking up to 100% of rated current requires one power dissipator for 1 kW models, and two power
dissipators for 2 kW models. 2 kW models with one power dissipator can sink 50% of their rated current.
2
Maximum continuous power available is derated at 1% of rating per degree C from 40°C to 55°C
3
From 20 Hz to 20 MHz
4
At 23°C ±5°C after a 30 minute warm-up; measurement NPLC=1; valid for 1 year
5
With resistance programming enabled, the voltage programming offset component increases by a factor of 3.15
6
Load lead drop applies to each load lead
7
Time to recover to within the settling band following a load change from 50% to 100% of full load (10 µs rise time)