INA300 datasheet(14/41 Pages) TI1

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VIN

(VIN+ - VIN-)

VLIMIT

Transparent Mode

ALERT

(Delay = 10 µs)

ALERT

(Delay = 50 µs)

10 µs

No Alert

50 µs

No Alert

50 µs

10 µs

INA300

SBOS613B – FEBRUARY 2014 – REVISED APRIL 2016

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Requiring multiple consecutive overcurrent detections aides significantly in reducing the likelihood of system

noise causing false alerts, which can be extremely detrimental to critical system operations. However, by

enabling an alert window equal to the comparison window of 10 µs, the device still has the flexibility to be used in

fast overcurrent detection applications that require quick responses to rapidly changing system operating

characteristics.

In Figure 22, the device alert output response is shown for both a 10-µs delay setting and a 50-µs delay setting

based on the same input signal condition. The initial increase of the input signal, VIN, above the VLIMIT level

remains above the limit for approximately 30 µs. With the device set to the 10-µs delay setting, the overcurrent

condition is detected and the alert output terminal is pulled low approximately 10 µs later. With the device set to

the 50-µs delay setting, an alert is not issued because five consecutive 10-µs overcurrent measurements are not

detected. With the input signal only being over the limit for 30 µs rather than the corresponding 50 µs needed for

this delay setting, the device does not issue an alert under this condition. For the second instance where VIN

rises above the VLIMIT threshold, the input remains above the limit for more than five consecutive 10-µs

measurements, indicating an overcurrent condition and the alert output terminal is pulled low.

Figure 22. DELAY Terminal Settings

INA300 Datasheet(PDF) 14 Page - Texas Instruments