UM0546

Evaluation board description

Doc ID 14680 Rev 2

5/18

2

Evaluation board description

The PTB801DB is a valve drivers board for ABS and ESC system based on

STMicroelectronics devices. The board implements a flexible and open design

demonstrating the capability of the STMicroelectronics for ABS and ESC applications. The

PTB801DB mounts two L9347 and L9352B devices, the control caming from PTB801 MB.

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 L9347 and

L9352B

●

Full system evaluation: integration, basic and safety functionalities

2.1.1

L9347 quad intelligent power low-side switch

The L9347 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 250 mA to 2.25 A and an accuracy of 10 %. All channels are protected against fail

functions. They are monitored by a status output.

.

Figure 1.

L9347 pin connection (top view)

36

N.C.

35

IN3

ST4

34

PGND3

33

32

PGND3

Q3

31

Q3

30

29

D3

D3

28

Q2

27

26

Q2

PGND2

25

PGND2

24

23

VS

VDD

22

VCC

21

20

IN2

ST1

19

GND

1

IN4

2

3

ST3

PGND4

4

PGND4

5

6

Q4

Q4

7

D4

8

9

D4

Q1

10

Q1

11

12

PGND1

PGND1

13

EN

14

15

CLK

IN1

16

ST2

17

18

TEST

99AT0060