L9788 datasheet(93/264 Pages) STMICROELECTRONICS

93 / 264 page

DS12308 Rev 4

93/264

L9788

Low-side drivers

263

Figure 36. O2 Heater LowSide driver current sense block

Conditions:

5.5 V ≤ VB_IN ≤ 18 V, Tj -40 to 175 °C unless otherwise specified.

MSC_Command

driver

Curr_sense_O2H1/2

VDDS_IN

PGND

O2H1/2

GADG0212160756PS

Table 46. Low-side driver - O2 HEATER electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

O2H

LS_RdsON

Low-side RdsON

Tj = 150 °C, ILOAD = 3 A

0.047

0.16

0.216

Ω

O2H1/2

Tj = 25 °C, ILOAD = 3 A

0.04

0.12

0.155

Ω

O2H1/2

Tj = -40 °C, ILOAD = 3 A

0.03

0.9

0.12

Ω

O2H1/2

OUTx_lkg

Output leakage

current

Output disabled, diagnostic

off Vpin = 13.5 V

-10

+10

µA

O2H1/2

Irev_OUTx

Body diode reverse

current voltage drop

ILOAD = -2 A

O2H1/2

SR_ON

Voltage slew ON

State

From 80% to 30% of VOUT

VB_IN = 14 V, Rload = 3 Ω,

Cload = 10 nF; configure as

0.2

0.8

V/µs

O2H1/2

SR_ON_fast

Fast voltage slew

ON State

From 80% to 30% of VOUT

VB_IN = 14 V, Rload = 3 Ω,

Cload = 10 nF; configure as

sol, fast slew rate

V/µs

O2H1/2

SR_OFF

Voltage slew OFF

state

From 30% to 80% of VOUT

VB_IN = 14 V, Rload = 3 Ω,

Cload = 10 nF; configure as

0.2

0.8

V/µs

O2H1/2

SR_OFF_fast

Fast Voltage slew

OFF State

From 30% to 80% of VOUT

VB_IN = 14 V, Rload = 3 Ω,

Cload = 10 nF; configure as

sol, fast slew rate

V/µs

O2H1/2

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