Datasheet

DocID15234 Rev 6 21/40
VNI8200XP Functional pin description
9.7 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 than 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 6. Output channel enable/disable behavior
9.8 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
).
OUT_EN
Vin( i)
OUT(i )
t
t
t
t
OUT_EN
AM12824v1