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Application Note 1790

ISL8225MEVAL3Z 30A, Single Output Evaluation Board

Setup Procedure

The ISL8225M is a complete, dual step-down switching mode

DC/DC module. The dual outputs can easily be paralleled for

single-output, high-current use. It is easy to apply this

high-power, current-sharing DC/DC power module to

power-hungry datacom, telecom, and FPGA applications. All

that is needed in order to have a complete, 30A design ready

for use are the ISL8225M, a few passive components, and

The ease of use virtually eliminates design and manufacturing

risks while dramatically improving time to market.

The simplicity of the ISL8225M is its off-the-shelf, unassisted

implementation. Patented module structure allows for higher

power density and better efficiency than competing solutions.

Patented current sharing in multi-phase operation greatly

reduces ripple currents, BOM costs, and complexity.

The ISL8225MEVAL3Z evaluation board enables a single

output by paralleling two phases to deliver 30A continuous

load current. The ISL8225M supports input voltage from 4.5V

to 20V and the output voltage ranges from 0.6V to 6V. With the

single resistor modification, the output voltage can be easily

adjusted to different voltages.

Related Resources

Recommended Equipment

• 0V to 20V power supply with at least 10A source current

capability

• Electronic load capable of sinking current up to 30A

• Digital multimeters (DMMs)

• 100MHz quad-trace oscilloscope

Quick Start

The inputs are J1 (VIN) and J2 (GND). The outputs are J3 (VOUT)

and J4 (GND). Refer to Figure 1 for connections.

1. Connect a power supply capable of sourcing at least 10A to

the input (VIN J1 and GND J2) of the ISL8225MEVAL3Z

evaluation board, with a voltage between 4.5V to 20V.

Connect an electronic load or the device to be powered to

the output (VOUT J3 and GND J4) of the board. All

lines, should be able to carry the desired load current and

should be made as short as possible.

which should be at 1.2V if the board is working properly.

value of 1.2V; if different output voltages are desired, board

Please refer to the table printed on the backside of the

which can be used to produce different output voltages.

See how-to

video at

intersil.com/

evid01

FIGURE 1. ISL8225MEVAL3Z BOARD IMAGE

LOAD

(0A~30A)

4.5V TO 20V

V

+

-

+

-

V

+

-

December 3, 2012

AN1790.0