herunterladen
1
Application Note 1793
ISL8225MEVAL4Z Evaluation Board User Guide
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, dual 15A design
ready for use are the ISL8225M, a few passive components
and V
OUT
setting resistors.
The simplicity of the ISL8225M is its off-the-shelf, unassisted
implementation. Patented current sharing in multiphase
operation greatly reduces ripple currents, BOM costs and
complexity. The ISL8225M has a thermally enhanced, compact
17mmx17mmx7.5mm QFN package that operates at full load
and over-temperature without requiring forced-air cooling. Easy
access to all pins, with few external components, reduces PCB
design to a component layer and a simple ground layer.
This ISL8225MEVAL4Z evaluation board is designed for dual
15A output applications. Optionally, this board can easily be
converted for 30A single output use. Multiple
ISL8225MEVAL4Z boards can be cascadable through the
SYNC and CLKOUT pins to operate with phase shifting, for
paralleling or multiple output use. The input voltage of this
board is 4.5V to 20V and the default outputs on this board are
set at 1.2V and 1.5V.
Related Resources
Related Literature
• ISL8225M datasheet
Specifications
This board has been configured and optimized for the following
operating conditions:
•V
IN
= 4.5V to 20V, V
O1
= 1.2V, V
O2
= 1.5V
•I
O1
= 15A, I
O2
= 15A
•f
SW
= 500kHz
Key Features
• Full encapsulated dual step down switching power supply
•Up to 100W output
• Dual 15A or single 30A output
• 4.5V to 20V input range
•0.6V to 7.5V output range
• 1.5% output voltage accuracy
• Up to 95% conversion efficiency
See how-to
video at
intersil.com/
evid03
Ordering Information
PART NUMBER DESCRIPTION
ISL8225MEVAL4Z Dual 15A/Optional 30A Cascadable
Evaluation Board
FIGURE 1. ISL8225MEVAL4Z BOARD IMAGE
LOAD2
(0A~15A)
V
OUT2
4.5V TO 20V
V
IN
V
+
-
+
-
V
+
-
LOAD1
(0A~15A)
V
+
-
V
OUT1
December 1, 2014
AN1793.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas LLC 2012, 2014. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
