ACS704ELC-015 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
ACS704ELC-015
Allegro MicroSystems
'ACS704ELC-015' PDF : 20 Pages View PDF
ACS704ELC-015
The results of the testing are shown in the following table.
Effect of PCB Layout on ACS704 Thermal Performance
Tested at 15A, TA = 20°C, still air, 2 oz. copper traces
PC Boards
Sides with Traces
Trace Width (mm)
Trace Length (mm)
Temperature Rise
Above Ambient (°C)
4
50
90
1.5
50
Overheated
1
4
10
48
1.5
10
110
4
50
53
1.5
50
106
2
4
10
38
1.5
10
54
Improved PC Board Designs
The eight PC boards in the figure above do not represent an ideal PC board for use with the ACS704. The ACS704 evaluation
boards, for sale at the Allegro Web site On-Line Store, represent a more optimal PC board design (see photo below). On the
evaluation boards, the current to be sensed flows through very wide traces that were fabricated using 2 layers of 2 oz. copper.
Thermal management tests were conducted on the Allegro evaluation boards and all tests were performed using the same test
conditions described in the bulleted list above. The results for these thermal tests are shown in the table below. When using
the Allegro evaluation boards we see that even at an applied current of 20 A the junction temperature of the ACS704 is only
~30 degrees above ambient temperature.
ACS704 Thermal Performance on the Allegro Eval PC Boards
Applied Current (A)
Ta = 20°C, Still Air
15
20
Temp Rise Above Ambient
(°C)
22
31
ACS704ELC015-DS, Rev. 6
18
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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