UM0547

Evaluation board description

Doc ID 14682 Rev 2

5/13

2

Evaluation board description

The PTB801DC is a valve drivers board for ABS system based on STMicroelectronics

devices. The board implements a flexible and open design demonstrating the capability of

the STMicroelectronics for ABS applications. The PTB801DC mounts two L9349 devices,

the control coming from UN24 mother board.

The board has opened connectivity to external valves.

2.1

Features

General features of this board are:

●

Full evaluation and development system based on the system basis chip L9349

●

Full system evaluation: integration, basic and safety functions

2.1.1

L9349 quad intelligent power low-side switch

The L9349 is a monolithic integrated quad low side driver realized in an advanced

BCDmultipower mixed technology. The device is intended to drive valves in automotive

environment.

The L9349 is a quad low-side driver with following functions:

●

Quad power low side driver with 2 x 5 A and 2 x 3 A output current capability

●

●

recirculation

●

Limited output voltage slew rate for low EMI

●

Protected µP compatible enable and input

●

Wide operating supply voltage range 4.5 V to 32 V

Figure 1.

L9349 pin connection (top view)

20

PGND

19

OUT4

D4

18

IN1

17

16

EN

GND

15

IN2

14

13

D3

OUT3

12

PGND

11

PGND

1

OUT1

2

3

D1

IN4

4

VS

5

6

NC

IN3

7

D2

8

9

OUT2

PGND

10

00AT0026

Heat sink connected

to pins 1, 10, 11, 20