ACS709 Allegro MicroSystems, Inc., ACS709 Datasheet - Page 11

• Manufacturer Part Number: ACS709
• Description: High Bandwidth, Fast Fault Response Current Sensor Ic In Thermally Enhanced Package
• Manufacturer: Allegro MicroSystems, Inc.

ACS709
The V
switchpoint can be calculated as follows:
where V
rent fault switchpoint) in A.
OC
OC
needed for setting the overcurrent fault
is in mV, Sens in mV/A, and I
Example: For ACS709LLFTR-35BB-T, if required overcurrent fault switchpoint is 50 A, and V
required V
– 0.25 V
– 0.4 V
0.4 V
0.25 V
V
OC
CC
CC
CC
CC
= Sens × | I
/ Sens
OC
/ Sens
/ Sens
/ Sens
can be calculated as follows:
0
I
OC
OC
Setting Overcurrent Fault Switchpoint
High Bandwidth, Fast Fault Response Current Sensor IC
| ,
V
OC
0. 25 V
OC
(overcur-
= Sens × I
I
OC
CC
versus V
OC
= 28 × 50 = 1400 (mV)
| Ioc | is the overcurrent fault switchpoint for a bi-
directional (AC) current, which means a bi-directional
device will have two symmetrical overcurrent fault
switchpoints, +I
See the following graph for I
0. 4 V
OC
CC
In Thermally Enhanced Package
V
OC
OC
and –I
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
CC
Not in Valid Range
In Valid Range
OC
= 5 V, then the
.
OC
and V
OC
ranges.
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