VNI8200XP Datasheet, PDF (16/34 Pages) STMicroelectronics – Octal high-side smart power solid state relay with serial/parallel selectable interface on chip

Functional pin description
VNI8200XP
6.7
Output enable (OUT_EN)
If SEL2 = H, the OUT_EN pin provides a fast way to disable all the outputs simultaneously.
When the OUT_EN pin is driven low for at least T_RES, the outputs are disabled while fault
conditions in the SPI register are latched. To enable the outputs it is then necessary to raise
the OUT_EN pin and re-program the IC through the SPI interface. As fault conditions are
latched inside the IC and SPI interface is working also while the OUT_EN pin is driven low,
it’s possible to use SPI to detect if a fault condition occurred before the reset event.
The device is ready to operate normally after a T_SU period. The OUT_EN pin is the fastest
way to disable all the outputs when a fault occurs.
Figure 4. Output channel enable/disable behavior
OUT_EN
t
Vin( i)
t
OUT(i)
tOUT_EN
t
AM12824v1
6.8
IC warning case temperature detection (TWARN)
The TWARN pin is an active low open drain output. This pin is activated if the IC case
temperature exceeds T_CSD. According to the PCB thermal design and R_thJC value, this
function allows a warning about a PCB overheating condition to be given.
The TWARN bit is also available through SPI. This bit is not latched: the TWARN pin is low
only while the case overtemperature condition is active (T_C > T_CSD) and is released when
this condition is removed (T_C < T_CR).
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Doc ID 15234 Rev 4