Time (5 ms/div)

Positive Limit

Negtive Limit

0V

22

INA301

SBOS713A – SEPTEMBER 2015 – REVISED FEBRUARY 2016

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Typical Application (continued)

8.2.2 Detailed Design Procedure

With the input pins of a second device reversed across the same current-sensing resistor, the second device is

now able to detect current flowing in the other direction relative to the first device; see Figure 42. The outputs of

each device connect to an AND gate to detect if either of the limit threshold levels are exceeded. As shown in

Table 6, the output of the AND gate is high if neither overcurrent limit thresholds are exceeded. A low output

state of the AND gate indicates that either the positive overcurrent limit or the negative overcurrent limit are

surpassed.

Table 6. Bidirectional Overcurrent Output Status

OCP STATUS

OUTPUT

OCP+

0

OCP–

0

No OCP

1

8.2.3 Application Curve

Figure 43 shows two INA301 devices being used in a bidirectional configuration and an output control circuit to

detect if one of the two alerts is exceeded.

Figure 43. Bidirectional Application Curve