L9965P-FN datasheet(24/104 Pages) STMICROELECTRONICS

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Figure 9. FAULTN integrity check in low power mode (example of fault detected by L9965P)

CWUP

tCWUP_WAKEUP_TIME

tFAULTN_PULSE

FAULT

Internal timeout

of L9965C

Internal deglitch

of L9965C

tCWUP_PERIOD_xxx

(L9965C)

MCU intervenes switching

to full power for fault

acknowledgement routine

(CWUP_HOLD = 1)

FAULT

CLEARED

FAULT

LATCHED

tFLTIN_DEGLITCH

FLTIN Timeout restarted by

FLTIN rising edge in full power

mode (CWUP_HOLD = 1)

L9965P starts

toggling the FAULTN

output cyclically

FLTIN_L9965C

FAULTN_L9965P

3.5.2

FAULTN electrical parameters

All parameters are tested and guaranteed in the following conditions, unless otherwise noted: all supplies

according to the Table 3; TJ according to the Table 2.

Table 18. FAULTN electrical parameters

Symbol

Parameter

Test condition

Min Typ Max Unit

tFAULTN_PERIOD

FAULTN line integrity pulse period

Guaranteed by SCAN

5.5

14.5

FAULTN

tFAULTN_PULSE

FAULTN line integrity pulse duration

Guaranteed by SCAN

µs

FAULTN

tFAULT_HANDLING_TIMEOUT Fault handling timeout

Guaranteed by SCAN

1.8

2.1

FAULTN

L9965P

Functional description

DS14702 - Rev 4

page 24/104

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