L9788 datasheet(103/264 Pages) STMICROELECTRONICS

103 / 264 page

DS12308 Rev 4

103/264

L9788

Low-side drivers

263

OFF state diagnostic

VLVT

Short to GND

threshold voltage

Driver tristate, diag

enabled

1.9

VOUTO

PEN

-180mV

RLY/1/2/3/4/5

V_OL

Open load threshold

voltage

Driver tristate, diag

enabled

VOUTO

PEN

+160mV

3.0

RLY/1/2/3/4/5

VOUTOPEN

Open load output

voltage

Driver tristate, diag

enabled

2.3

2.5

2.7

RLY/1/2/3/4/5

I_LS_PU1

Diagnostic pull up

current

In OFF condition,

OUTx < VLVT,

Ipupd_EN = ENB,



Ipupd_MODE =”1”

2.3

3.6

4.7

RLY/1/2/3/4/5

I_LS_PU2

Diagnostic pull up

current

In OFF condition,

OUTx < VLVT,



Ipupd_EN = ENB,



Ipupd_MODE = ”0”

100

µA

RLY/1/2/3/4/5

I_LS_PD1

Diagnostic pull down

current

In OFF condition,



OUTx > VOUTOPEN,

Ipupd_EN = ENB

105

µA

RLY/1/2/3/4/5

Tflt_diagoff1

DIAG Filter time

Filter Mode=0

100

125

µs

RLY/1/2/3/4/5

Tflt_diagoff2

DIAG Filter time

Filter Mode=1

450

600

750

µs

RLY/1/2/3/4/5

Minimum OFF time

for correct diagnostic

Application note (esd cap

< 10 nF,)

Filter Mode = 0

175

µs

RLY/1/2/3/4/5

Fast OFF diagnostic

ON→OFF→ON

Filter Mode = 0

175

200

225

µs

RLY/1/2/3/4/5

Fast ON diagnostic

OFF→ON→OFF

µs

RLY/1/2/3/4/5

Table 48. Low-side driver - RELAY electrical characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

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