ACS704ELC-005_06 ALLEGRO [Allegro MicroSystems], ACS704ELC-005_06 Datasheet - Page 19

• Manufacturer Part Number: ACS704ELC-005_06
• Description: Fully Integrated, Hall Effect-Based Linear Current Sensor with Voltage Isolation and a Low-Resistance Current Conductor
• Manufacturer: ALLEGRO [Allegro MicroSystems]

ACS706ELC20A-DS, Rev. 2
Improved PC Board Designs
The eight PC boards in the figure above do not represent an ideal PC board for use with the ACS706. The ACS706 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 ACS706 is only
≈30 degrees above ambient temperature.
Test Results on Eight Electrical Characterization PCBs
Tested at T
Applied Current
A
= 20°C, still air
(A)
15
20
Allegro Current sensor evaluatin board with ACS706
and external connections.
ACS706ELC-20A
Temp Rise Above Ambient
(°C)
22
31
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
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