L99PM60J datasheet(21/75 Pages) STMICROELECTRONICS

21 / 75 page

L99PM60J

Detailed description

Doc ID 18309 Rev 6

21/75

Figure 10.

Recovery after forced VBAT due to short at V1 failure

2.7.3

Fail Safe Output (OUT1)

The device provides a high side output (OUT1) which can be used as Failsafe output. The

default configuration after power on for OUT1 is Failsafe output.

The Failsafe output is protected against

●

Overvoltage and undervoltage (undervoltage can be masked by SPI for OUT1).

See Control Register 2.

●

Overcurrent

In case of overcurrent condition, FSO switches off. The according status bit is latched and

can be read and optionally cleared by SPI. The drivers remain off until the status is cleared.

In case overvoltage or undervoltage condition, FSO is switched off. The according status bit

is latched and can be read and optionally cleared by SPI. The drivers remain off until the

status is cleared.

With the OUT UV shutdown enable bit (Control Register 2) the FSO can be excluded from a

switch off in case of Vs Undervoltage. If the bit is set to ‘1’ the driver switches off, otherwise

the drivers remain on.

In case of open-load condition, the according status register is latched. The status can be

read and optionally cleared by SPI. The FSO is not switch off.

Note:

The maximum voltage and current applied to the High Side Outputs is specified in chapter 4

‘Absolute Maximum Ratings’. Appropriate external protection may be required in order to

respect these limits under application conditions.

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