Using The Evaluation Board; Powering Up - Analog Devices ADP5014-EVALZ User Manual

ADP5014-EVALZ User Guide

USING THE EVALUATION BOARD

POWERING UP

The ADP5014-EVALZ evaluation board is supplied fully
assembled and tested. Before applying power to the evaluation
board, follow the procedures in this section.
Jumper J-EN1 (EN1/ENALL)
To enable Buck 1, short the middle pin of J-EN1 to PVIN. PVIN
is the shared PVINx pin supply (see Figure 4).
To disable Buck 1, short the middle pin of J-EN1 to GND.
Jumper J-EN2 (EN2/DL12)
To enable Buck 2, short the middle pin of J-EN2 to PVIN.
To disable Buck 2, short the middle pin of J-EN2 to GND.
Jumper J-EN3 (EN3/UV)
To enable Buck 3, short the middle pin of J-EN3 to PVIN.
To disable Buck 3, short the middle pin of J-EN3 to EN3/UV.
Jumper J-EN4 (EN4/DL34)
To enable Buck 4, short the middle pin of J-EN4 to PVIN.
To disable Buck 4, short the middle pin of J-EN4 to GND.
Input Power Source
If the input dc power source includes a current meter, use that
meter to monitor the input current. Connect the positive
terminal of the power source to J1 (PVIN) of the evaluation
board, and the negative terminal of the power source to J2
(GND) of the evaluation board.
If the dc 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 positive
(+) ammeter terminal, the negative lead (−) of the power source
to J2 (GND), and the negative lead (−) of the ammeter to J1
(PVIN).
Note that the power source trace must be short and thick enough to
prevent a long trace voltage drop or a potential oscillation on the
board supply, which may cause damage to the chip.
Output Load
Before connecting the load, ensure that all the regulators are turned
off. Connect an electronic load or resistor for each regulator to
set the load current.
Using Buck 1 as an example, connect the positive terminal of
the load to J3 (VOUT1) of the evaluation board and connect the
negative terminal of the load to J4 (GND).
Input and Output Voltmeter
Measure the input and output voltages using voltmeters. Ensure
that the voltmeters are connected to the appropriate terminals of
the evaluation board and not to the load or power source. If the
voltmeters are not connected directly to the evaluation board,
the measured voltages are incorrect due to the voltage drop across
the leads and/or connections between the evaluation board, the
power source, and/or the load.
To measure the input voltage, connect the input voltage
measuring voltmeter positive (+) terminal to J1 (PVIN) and the
input voltage measuring voltmeter negative (−) terminal to J2
(GND).
Likewise, to measure the output voltage of Buck 1, connect the
output voltage measuring voltmeter positive (+) terminal to J3
(VOUT1), and connect the output voltage measuring voltmeter
negative (−) terminal to J4 (GND).
The measurement method of the output voltage for the other
regulators is the same as for Buck 1.
Quick Start
Ensure that the power source voltage for the buck regulators
(PVIN) is 2.75 V to 6.0 V. Use the J-EN1, J-EN2, J-EN3, and
J-EN4 jumpers to enable or disable the desired channel.
Figure 2 shows the
diagram. When the power source and load are connected to the
evaluation board, the board can be powered for operation. If the
load is not enabled, enable the load. Verify that the evaluation
board is drawing the proper current and that the output voltage
maintains voltage regulation.
After power-up, measure the following output voltages:
•
V = 1.0 V, supply up to a 4 A output load
OUT1
•
V = 1.5 V, supply up to a 4 A output load
OUT2
•
V = 1.8 V, supply up to a 2 A output load
OUT3
•
V = 3.3 V, supply up to a 2 A output load
OUT4
Rev. 0 | Page 3 of 11
ADP5014 evaluation board connection
UG-1137