L9788 datasheet(61/264 Pages) STMICROELECTRONICS

61 / 264 page

DS12308 Rev 4

61/264

L9788

Main relay driver (low-side driver)

263

5.3

Error handling

The Main Relay Driver follows the same error handling table as other low-side drivers.

V_OL

Open load

threshold voltage

Driver tristate, diag

enabled

VOUTOPEN

+160 mV

-3.0

MRD

VOUTOPEN

Open load output

voltage

Driver tristate, diag

enabled

2.3

2.5

2.7

MRD

I_LS_PU1

Diagnostic pull up

current

In OFF condition,

OUTx < VLVT,

Ipupd_EN = ENB,

Ipupd_MODE = ”1”

2.5

3.6

4.7

MRD

I_LS_PU2

Diagnostic pull up

current

In OFF condition,

OUTx < VLVT,

Ipupd_EN = ENB,

Ipupd_MODE = ”0”

100

µA

MRD

I_LS_PD1

Diagnostic pull

down current

In OFF condition,

OUTx >

VOUTOPEN,

Ipupd_EN = ENB

110

µA

MRD

Tflt_diagoff1

DIAG Filter time

Filter Mode=0

100

125

µs

MRD

Tflt_diagoff2

DIAG Filter time

Filter Mode=1

450

600

750

µs

MRD

Minimum OFF

time for correct

diagnostic

Application note



(esd cap < 10 nF)

Filter Mode = 0

175

µs

MRD

Fast OFF

diagnostic

ON→OFF→ON

Filter Mode = 0

175

200

240

µs

MRD

Fast ON

diagnostic

OFF→ON→OFF

-65

µs

MRD

Driver Reliability Data

EnergyRep MRD

Energy Repetitive

Pulses

I_OT_n = 0.3 A

Freq = 1 Hz ;



4 Miopulses

Tj =150 °C

6.5

MRD

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

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

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