VNI8200XP-32 datasheet(22/43 Pages) STMICROELECTRONICS

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Pin function description

VNI8200XP-32

22/43

DocID027849 Rev 3

The device is ready to operate normally after a TSU period. The OUT_EN pin is the fastest

way to disable all outputs when a fault occurs.

Figure 6: Output channel enable/disable behavior

9.8

IC warning case temperature detection

The TWARN

pin is an active low open drain output. This pin is active if the IC case

temperature exceeds TCSD. According to the PCB thermal design and RthJC 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

is low only while the case overtemperature condition is active (TC > TCSD) and is released

when this condition is removed (TC < TCR).

9.9

Fault indication

The FAULT

pin is an open drain active low fault indication pin. This pin is activated by

one or more of the following conditions:



Channel overtemperature (OVT)

This pin is activated when at least one of the channels is in junction overtemperature.

Unlike the SPI fault detection bits, this signal is not latched: the FAULT

pin is low only

when the fault condition is active and is released if the input driving signal is OFF or after

the OVT protection condition has been removed. This last event occurs if the channel

temperature decreases below the threshold level and the case temperature has not

exceeded TCSD or is below TCR. This means that the FAULT pin is low only while the

junction overtemperature is active (TJ > TTSD) and is released after this condition has

been removed (TJ < TR and TC < TCR).



Parity check fail

When SPI mode is used (SEL2 = H), if a parity check fault of the incoming SPI frame is

detected or counted, CLK rising edges are different by a multiple of 8, the FAULT

pin is

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