Rev 21 Jan 2014 15:09 | Page 11

Output Load

Ensure that the board is turned off before connecting the load.

Connect an electronic load or resistor to set the load current. 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 connected to one of the channels. For example, connect Buck 1, J16 (VOUT1), and the negative

(−) load connection to J15 (GND).

If an ammeter is used, connect it in series with the load. Connect the positive (+) ammeter terminal

to the evaluation board for Buck 1, J16 (VOUT1), connect the negative (−) ammeter terminal to the

positive (+) load terminal, and connect the negative (−) load terminal to the evaluation board at J15

(GND).

Input and Output Voltmeters

Measure the input and output voltages with voltmeters. Ensure that the voltmeters are connected to

the appropriate evaluation board terminals and not to the load or power sources themselves.

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.

Connect the input voltage measuring voltmeter positive terminal (+) to the evaluation board at J11

(PVIN1_4) and connect the input voltage measuring voltmeter negative (−) terminal to the evaluation

board at J12(GND). Connect the output voltage measuring voltmeter positive (+) terminal to the

evaluation board at J16 (VOUT1) for measuring the output voltage of Buck 1, and connect the output

voltage measuring voltmeter negative (−) terminal to the evaluation board at J15 (GND).

Quick Start

Ensure that the software and USB driver are installed as described in the Installing the Software

section. Ensure that

The power source voltage for the buck regulators (PVIN1, PVIN2, PVIN3, PVIN4) is 4.5 V to 15 V.

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Shunt the S1, S2, and S3 jumpers to use all of the same input voltages for the buck regulators.

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Input the WDI toggle signal, which is required as an evaluation WDI feature.

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Use the J-EN1, J-EN2, J-EN3, and J-EN4 jumpers to enable or disable the desirable channel.

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Figure 10 shows the ADP5051 board connection diagram. The ADP5053 works in a similar manner,