Protection and diagnostic

IPS161H

14/25

DocID029436 Rev 2

Figure 5: Current limitation and cut-off

The fault condition is reported on the DIAG pin. The internal cut-off flag signal is latched at

pin.

The status of the DIAG is independent on the IN pin status.

If CoD pin is connected to GND through 1 kΩ resistor (cut-off feature disabled), when the

output channel triggers the limitation threshold, it remains on, in current limitation condition,

until the input becomes LOW or the thermal protection threshold is triggered.

> 36 V) the cut-off function needs activating in order to avoid IC permanent damages. The

following table reports the suggested cut-off delay for the different operating voltage.

Table 11: Minimum cut-off delay for TAMB less than -20 °C

Cut-

off delay [μs]

Cut-off capacitance [nF]

36-48

100

2.2

48-60

50

1

6.4

Open load in off-state

The IPS161H provides the open load detection feature which detects if the load is

OUT and VCC pins.