2
dc2131afb
DEMO MANUAL DC2131A
QUICK START PROCEDURE
Demonstration circuit 2131A is easy to set up to evalu-
ate the performance of the LTC3623. Refer to Figure 1
for proper measurement equipment setup and follow the
procedure below:
NOTE: When measuring the output voltage ripple, care must
be taken to avoid a long ground lead on the oscilloscope
probe. Measure the output voltage ripple by touching the
probe tip and ground ring directly across the last output
capacitor as shown in Figure 1.
1. Using an input power supply that is capable of 4V to
15V, set the voltage to 12V. Then turn off the supply.
2. With power off, connect the supply to the input terminals
+V
IN
and –V
IN
.
a. If efficiency measurements are desired, an ammeter
capable of measuring 5A DC or a resistor shunt can be
put in series with the input supply in order to measure
the DC1722A’s input current.
b. A Voltmeter with a capability of measuring at least 15V
can be placed across the input terminals in order to get
an accurate input voltage measurement.
3. Turn on the power at the input.
NOTE: Make sure that the input voltage never
exceeds 15V.
4. Check for the proper output voltage which is set using
a jumper. Setting the jumper to the OPT position will
set the output voltage to 5V.
5. Once the proper output voltage is established, connect
a variable load capable of sinking 5A at 5V to the output
terV
OUT
and –V
OUT
. Set the current for 0A.
a. If efficiency measurements are desired, an ammeter
or a resistor shunt that is capable of handling 5A DC
can be put in series with the output load in order to
measure the DC3623A’s output current.
b. A Voltmeter with a capability of measuring at least 5V
can be placed across the output terminals in order to
get an accurate output voltage measurement.
NOTE: If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
6. Adjust the load and/or input within the operating range
and observe the output voltage regulation, ripple volt-
age, efficiency and other desired parameters.