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dc2052af
DEMO MANUAL DC2052A
QUICK START PROCEDURE
Demonstration circuit 2052A makes it easy to set up and
evaluate the performance of the LTC3880 and the LTC3883.
Refer to Figure 2 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 C16. See Figure 3
for proper scope probe technique.
1. Make sure jumpers are in the following positions:
JUMPER
POSITION
FUNCTION
JP1
OFF
EXTVCC_DRV – External V
CC
for
LTC3880/LTC3883-1
JP2
OFF
LED Indicator
JP3
OFF
Pulse Generator
2. With power off, connect the input power supply to VIN
and GND. Connect active load to the output.
3. Make sure the RUN switch (SW) is OFF.
4. Turn on the power at the input.
Note:
Make sure that the input voltage does not exceed 16V.
5. Turn on the RUN switch as desired.
6. Check for the correct output voltage from E3 to E4.
V
OUT
= 1.0V ±0.5% (1.005V ~ 0.995V)
Note:
If there is no output, temporarily disconnect the load
to make sure that the load is not set too high.
7. Once the proper output voltage is 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 QUICK START” session for
details.
Figure 1. Demo Setup with PC
