L9788 datasheet(97/264 Pages) STMICROELECTRONICS

97 / 264 page

DS12308 Rev 4

97/264

L9788

Low-side drivers

263

7.4

Low-side driver - SOLENOID SOL [1:2]

These 2 LowSide drivers are designed to driver Solenoid Valves Load. They are driven by

MSC command.The Output voltage is clamped to voltage limit by internal clamp circuit.

Figure 37. Solenoid valves LowSide driver stage

Conditions:

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

PGND

OUT7/8

Solenoid Valve DRIVER

Valve

MSC Command

OFF state

OL & STG detection

Driver

ON state

OC & OT protection

Safety BIST control

VBAT

L/R

GADG0212160929PS

Table 47. Low-side driver - SOLENOID VALVE electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Solenoid valves

LS_RdsON

Low-side RdsON

Tj = 150 °C, ILOAD = 3 A

0.24

0.35

0.47

Ω

SOL1/2

LS_RdsON

Low-side RdsON

Tj = 25 °C, ILOAD = 3 A

0.17

0.22

0.29

Ω

SOL1/2

LS_RdsON

Low-side RdsON

Tj = -40 °C, ILOAD = 3 A

0.12

0.17

0.2

Ω

SOL1/2

OUTx_lkg

Output leakage current

Output disabled, diagnostic

off Vpin = 13.5 V

-10

+10

µA

SOL1/2

Irev_OUTx

Body diode reverse

current voltage drop

ILOAD = -2 A

SOL1/2

SR_ON

Voltage slew ON state

From 80% to 30% of VOUT

VB_IN = 14 V, Rload = 15 Ω,

Cload = 10 nF

0.6

1.75

V/µs

SOL1/2

SR_OFF

Voltage slew OFF state

From 30% to 80% of VOUT

VB_IN = 14 V, Rload = 15 Ω,

Cload = 10 nF

0.6

1.75

V/µs

SOL1/2

S/RGkill_LSH

FAST VS/R off when an

OVC fault happens

From 30% to 80%of VOUT

VB_IN = 14 V, Rload = 15 Ω,

Cload = 10 nF

V/µs

SOL1/2

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