3
dc2161af
DEMO MANUAL DC2161A
DC2161A is easy to set up to evaluate the performance
of the LTC4231.
Connect a power supply capable of delivering greater than
3.5A of current between 10V and 20V to the V
IN
jack J1
with its return lead connected to GND J2. Monitor the input
voltage at turrets E1 and E2. Place a voltmeter between
turrets E3 and E4. Connect an ammeter between J3 and the
test loads. Connect the return lead of the test loads to jack
J4. The connections are shown schematically in Figure 1.
The active load should be set to provide a resistive load
since the LTC4231 may not start into a constant current
load. With the resistive load set at 5.4Ω, vary the input
voltage from 9V to 17V and from 17V to 9V to check the
UV and OV thresholds.
QUICK START PROCEDURE
Set the input voltage to 12V, vary the load resistance, and
observe output indicator D2. Determine from the ammeter
that the output remains on at 3A (4Ω). The output should
turn off at approximately 3.2A.
Reduce the load resistance to below 4Ω and observe an
auto reset in the DC2161A-B. In the DC2161A-A, power
will have to be removed and then applied to the input to
reset the LTC4231.
Remove the resistive load from the output and replace it
with a 500µF capacitor. Observe the polarity when con-
necting the capacitor. Upon application of input voltage,
LED D2 should illuminate to indicate V
OUT
is present. This
indicates the Hot Swap Controller is capable of starting
into a 500µF capacitor.
Figure 1. Proper Equipment Measurement Set-Up
V
A
TEST
LOADS
V
POWER
SUPPLY
