Product specifications

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Power Products 10 Most frequently asked questions about using
Applications Information DC power products
(Continued)
More detailed specifications at www.agilent.com/find/power
Series Current Sinking
Capability
6670 2000 Watt 50 W/actual output
voltage in volts or actual
output voltage in volts/
0.05 ohms, whichever
is less
6680 5000 Watt 50 W/actual output
voltage in volts or actual
output voltage in
volts/0.05 ohms,
whichever is less
6690 6600 Watt 50 W/actual output
voltage in volts or actual
output voltage in
volts/0.05 ohms,
whichever is less
6
I want to put a microswitch on the
safety cover over my UUT so that lifting
the cover will program my ATE power
supplies to zero volts and protect the
operator from harm. Do Agilent power
supplies have this capability?
Yes, many Agilent power supplies
have a feature called “Remote
Inhibit” (RI).
When connected to the RI input
on the rear of the power supply, a
contact closure or TTL low signal
causes the output of the supply to
shutdown and be programmed to
zero volts. The power supply can
also be set to generate a service
request (SRQ) via the GPIB in the
event that RI is pulled low.
7
Can I use Agilent electronic loads in
series and in parallel?
Agilent electronic loads are designed
to be operated in parallel for more
current, but NOT in series for more
voltage. Loads are fully protected
8
I must test a 1 volt power supply using a
constant current load and I want to use
Agilent electronic loads. But the Agilent
load meets all of its dynamic specs with
Use a boost supply in series with
the UUT. The load will now meet all
its specs with no derating, because
it always operates above 3 volts.
(see the illustration below)
The boost supply can be a low-cost
fixed output 3 V or 5 V supply with
a current rating at least as high as
the maximum peak load current
needed. The 6641A (8 V, 20 A),
6651A (8 V, 50 A), 6671A (8 V,
220 A), or 6681A (8 V, 580 A)
are all excellent choices.
against damage from current over-
loads, but will be damaged by voltage
above the maximum voltage rating.
no derating on down to 3 volts. Below
2 volts, the Agilent load current must be
linearly derated. What can I do?
The voltage setting of a program-
mable boost supply should be set
to 3 volts, and the current limit set
to full scale.
Select a boost power supply with
low p-p ripple and noise. The con-
stant current load will compensate
for low-frequency p-p ripple and
noise below a few kHz, but high
frequency ripple and noise from the
boost will appear across the UUT.