Quick Start Procedure - Linear ANALOG DEVICES DC1590B Demo Manual

DEMO MANUAL DC1590B

QUICK START PROCEDURE

Demonstration circuit 1590B makes it easy to set up
and evaluate the performance of the LTC3880. Refer to
Figure 3 for proper measurement equipment setup and
follow the procedure below:
Note: When measuring the input or 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 directly across the C32 or C34. See
Figure 5 for proper scope probe technique.
1. Make sure jumpers are in the following positions:
JUMPER POSITION FUNCTION
JP1 OFF
JP2 NC
JP3 ON
JP4 OFF
JP5 NC
2. With power off, connect the input power supply to V
and GND. Connect active loads to outputs.
3. Make sure both RUN switches are off.
4. Turn on the power at the input.
Note: Make sure that the input voltage does not exceed
24V.
2
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Write Protection of LTC3880
RUN0 to RUN1
3.3V Test—3.3V for LED indicator
EXTVCC_DRV—External V for LTC3880-1
CC
GPIO0B to GPIO1B—Tie GPIOs Together
5. Turn on RUN switches as desired.
6. Check for the correct output voltages. V
= 1.8V ± 0.5%
Note: If there is no output, temporarily disconnect the
load to make sure that the load current is not set too
high.
7. Once the proper output voltages are established, adjust
the loads within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters.
8. Connect the dongle and control the output voltages
from the GUI. See "LTpowerPlay GUI for the LTC3880
Quick Start Guide" for details.
Connecting a PC to DC1590B
You can use a PC to reconfigure the power management
features of the LTC3880 such as: nominal V
gin set points, OV/UV limits, temperature fault limits,
IN
sequencing parameters, the fault log, fault responses,
GPIOs and other functionality. The DC1613A dongle may
be plugged in regardless of whether or not V
= V
OUT1 OUT2
, mar-
OUT
is present.
IN
Rev. A