EVAL-ADP1864_15 Datasheet, PDF (3/16 Pages) Analog Devices – Evaluation Board for ADP1864 with Web Design Tool

POWERING THE EVALUATION BOARD
The ADP1864 evaluation board is supplied fully assembled or,
optionally, populated with only the ADP1864 IC. Before
applying power to the evaluation board, refer to Figure 2 and
follow the procedures in this section.
INPUT POWER SOURCE
Before connecting the power source to the ADP1864 evaluation
board, make sure that it is turned off. If the input power source
includes a current meter, use that meter to monitor the input
current. Connect the positive terminal of the power source to
the VIN terminal on the evaluation board, and the negative
terminal of the power source to the GND terminal just below
the VIN terminal. If the power source does not include a current
meter, connect a current meter in series with the input source
voltage. Connect the positive lead (+) of the power source to the
ammeter positive (+) connection, the negative lead (−) of the
power source to the GND terminal just below the VIN terminal
on the evaluation board, and the negative lead (−) of the
ammeter to the VIN terminal on the board.
OUTPUT LOAD
Although the ADP1864 evaluation board can sustain the sudden
connection of the load, it is possible to damage the load if it is
not properly connected. Make sure that the board is turned off
before connecting the load. If the load includes an ammeter, or
if the current is not measured, connect the load directly to the
evaluation board with the positive (+) load connection to the
VOUT terminal and the negative (−) load connection to the GND
terminal just above the VOUT terminal. If an ammeter is used,
connect it in series with the load; connect the positive (+)
VOLTAGE SOURCE
V_IN
I_IN
EVAL-ADP1864
ammeter terminal to the evaluation board VOUT terminal, the
negative (−) ammeter terminal to the positive (+) load terminal,
and the negative (−) load terminal to the evaluation board GND
terminal just above the VOUT terminal.
After the load is connected, make sure that it is set to the proper
current before powering the ADP1864 evaluation board.
INPUT AND OUTPUT VOLTMETERS
Measure the input and output voltages with voltmeters. Connect
the voltmeter measuring the input voltage with the positive lead
(+) connected to TP1 and the negative lead (−) connected to
TP2. Connect the voltmeter measuring the output voltage with
the positive lead (+) connected to TP4 and the negative lead (−)
connected to TP3. Make sure to connect the voltmeters to the
appropriate evaluation board terminals and not to the load or
power source themselves. If the voltmeters are not connected
directly to the evaluation board at these Kelvin connection test
points (TP1 to TP4), the measured voltages will be incorrect
due to the voltage drop across the leads connecting the
evaluation board to both the source and load.
TURNING ON THE EVALUATION BOARD
After the power source and load are connected to the ADP1864
evaluation board, the board can be powered for operation. Slowly
increase the input power source voltage until the input voltage
exceeds the minimum input operating voltage of 9 V. If the load
is not already enabled, enable the load and check that it is drawing
the proper current and that the output voltage maintains voltage
regulation.
ELECTRONIC LOAD
VOLTMETER
V_OUT
I_OUT
SWITCH NODE
WAVEFORM
INDUCTOR
CURRENT
WAVEFORM
CURRENT
PROBE
OSCILLOSCOPE
OUTPUT VOLTAGE
WAVEFORM
Figure 2. Measurement Setup
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