L9679P datasheet(250/279 Pages) STMICROELECTRONICS

250 / 279 page

Electrical characteristics

L9679P

250/279

DS11627 Rev 7

Table 57. Deployment drivers – AC specifications

Symbol

Parameter

Conditions

Min

Typ

Max Unit

TDEPL

Deployment time

DCR_x(Dep_Current) =

IDEPL_LO ≥1.209A rising to

1.209A falling;

TDEPL =

DCR_x(Deploy_Time)*

TDEP_TIME_RES - TDEL_IDEP

DCR_

x(Depl

oy_Ti

me)*

TDEP

_TIM

E_RE

S - 65

DCR

_x(D

eploy

_Tim

e)*

TDEP

_TIME

_RES -

TDEP_TIME_RES

DCR_x Deploy_Time

resolution

µs

TDEP_CC_RES

Deployment current counter

resolution

µs

TRISE_IDEPL

Rise time

10% - 90% of IDEPL

SSxy = 25 V,

RSQ = 2.2 ohm,

C = 22 nF L = 44 µH

µs

TDEL_IDEP

Delay time

SPI_CS to 90% IDEPL

µs

TFALL_IDEPL

Fall time

90% - 10% IDEPL

µs

TDEL_SD_LS

Low side shutdown delay

time

(with respect to high-side

deactivation)

µs

TFLT_ILIM_LS

Low side overcurrent to low

side deactivation deglitch

time in short to battery

condition

100

120

µs

TFLT_OS_LS

Low side overcurrent to high

side deactivation deglitch

time in case of intermittent

open to squib/pyroswitch

condition

µs

TOFF_OS_HS

High side OFF time in case

of intermittent open to

squib/pyroswitch condition

µs

1024

fosc

-------------

256

fosc

----------

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