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MCR03EZPFX3001

更新时间： 2024-09-15 11:59:27
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英特矽尔 - INTERSIL 电阻器PC
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12页 4505K
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ISL8225MEVAL2Z 6-Phase, 90A Evaluation Board Setup Procedure

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Application Note 1789  
ISL8225MEVAL2Z 6-Phase, 90A Evaluation Board Setup  
Procedure  
The ISL8225M is a complete, dual step-down switching mode  
Recommended Equipment  
DC/DC module. The dual outputs can easily be paralleled for  
• 0V to 20V power supply with at least 10A source current  
single-output, high-current use. It is easy to apply this  
capability  
high-power, current-sharing DC/DC power module to  
• Electronic load capable of sinking current up to 90A  
(multiple electronic current loads can be used in parallel to  
sink more current)  
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 VOUT setting resistors.  
• Digital multimeters (DMMs)  
• 100MHz quad-trace oscilloscope  
The ease of use virtually eliminates design and manufacturing  
risks while dramatically improving time to market. Need more  
output current? Simply parallel up to six ISL8225M modules to  
scale up to an 180A solution.  
Quick Start  
The inputs are J3 (VIN) and J4 (GND). The outputs are J1 and  
J5 (VOUT), J2 and J6 (GND) and J6 (VOUT2). Please refer to  
Figure 1. This 90A evaluation board can be easily modified to  
30A (one module) or 60A (two modules) operation.  
The ISL8225M has a thermally enhanced, compact 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.  
1. Connect a power supply capable of sourcing at least 10A to  
the input (VIN J3 & GND J4) of the ISL8225MEVAL2Z  
evaluation board, with a voltage between 4.5V to 20V.  
Connect an electronic load or the device to be powered to  
the output (VOUT (J1, J5) & GND (J2, J6)) of the board. All  
connections, especially the low voltage, high current VOUT  
lines, should be able to carry the desired load current and  
should be made as short as possible. Duplicated tab  
connections on VOUT (J1, J5) and GND (J2, J6) to carry large  
current.  
The ISL8225MEVAL2Z evaluation board allows for a single  
6-phase paralleled output, which delivers high current up to  
90A. The input voltage is 4.5V to 20V and the default output  
voltage on this board is set at 1.2V. The current level for this  
board is 90A with no extra cooling required.  
Related Resources  
2. Ensure the jumpers for EN2 and EN3 are in the “ON”  
position and EN is open. Turn on the power supply. If the  
board is working properly, the green LED will illuminate; if  
not, the red LED will illuminate (recheck the wire/jumper  
See how-to  
video at  
intersil.com/  
evid02  
connections in this case). Measure the output voltage, VOUT  
,
which should be at 1.2V.  
3. The ISL8225MEVAL2Z is manufactured with a VOUT default  
value of 1.2V; if different output voltages are desired, board  
resistors can be exchanged to provide the desired VOUT. Please  
refer to Table 1 on page 2 for R2/R64 resistor values, which  
can be used to produce different output voltages.  
+
-
+
-
+
LOAD  
(0A~90A)  
NOTE 1  
4.5V TO 20V  
V
V
IN  
V
V
OUT  
-
NOTE:  
1. Multiple loads can be paralleled to  
reach 90A (i.e. Two 45A loads  
paralleled together).  
FIGURE 1. ISL8225MEVAL2Z BOARD IMAGE  
December 3, 2012  
AN1789.0  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
Copyright Intersil Americas Inc. 2012. All Rights Reserved.  
1
1-888-INTERSIL or 1-888-468-3774 | 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.  
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