UM0546

Evaluation board description

Doc ID 14680 Rev 2

7/18

2.1.2

L9352B quad low-side switch

The L9352B is an integrated quad low-side power switch to drive inductive loads like valves

used in ABS systems. Two of the four channels are current regulators with current range

from 0mA to 2.25 A. All channels are protected against fail functions.

They are monitored by a status output.

Figure 2.

L9347 block diagram

99AT0059

LOGIC

Overload

Open Load

GND-det.

Overtemperature

Channel 1

Overtemperature

Channel 4

LOGIC

&

DA

Overload

Open Load

GND-det.

IPD

IPD

LOGIC

Overload

Open Load

GND-det.

Overtemperature

Channel 2

Overtemperature

Channel 3

LOGIC

&

DA

Overload

Open Load

GND-det.

IPD

IPD

drift-det.

VS

VCC

VDD

Q1

D4

Q4

Q2

D3

Q3

GND

TEST

ST3

IN3

ST2

IN2

ST4

IN4

ST1

IN1

CLK

EN

Internal Supply