L9788 datasheet(60/264 Pages) STMICROELECTRONICS

60 / 264 page

Main relay driver (low-side driver)

L9788

60/264

DS12308 Rev 4

Toff_MRD_20

Propagation

Delay from

Chip_EN falling

edge to 20%

output MRD

voltage

VB_IN=14V,



Rload = 20 Ω

Cload = 10 nF

µs

MRD

Vclamp_MRD

MRD clamping

Voltage

Iload = 0.3 A

MRD

Vclamp_MRD_high_curr

MRD clamping

Voltage

Iload = 1 A

Guaranteed by

design, provided

single pulse energy

limits are not violated

by clamping action

MRD

IOVC_MRD

Over current

driver threshold

-1

MRD

I_LS_ocv_flt

LS overcurrent

filter time

Guaranteed by scan

µs

MRD

TfT_Res

Self retry time

after OVC with

KEY_IN on or

WK_IN active or

WKE_UP_EOT

active

Guaranteed by scan

15.2

16.8

MRD

NRes_NN

Maximum number

of retry when

KEY_OC_RETRY

_MAX_EN=1

Guaranteed by scan

MRD

T_SD_HIGH

Temperature shut

down

185

200

°C

MRD

T_SD_LOW

Temperature shut

down recover

175

190

°C

MRD

T_SD_hys

Temperature shut

down hysteresis

-5

°C

MRD

tmsd_pre_an

Thermal

shutdown analog

filter time

Guaranteed by

design

1.5

µs

MRD

t_SD_deglitch

Digital deglitch

filter time on

Temperature shut

down detection

Guaranteed by scan

µs

MRD

OFF state diagnostic

VLVT

Short to GND

threshold voltage

Driver tristate, diag

enabled

1.9

VOUTO

PEN

-190mV

VMRD

Table 26. Main relay low-side driver electrical characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

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