ST IFP020V1 User Manual

STEVAL-IFP020V1

PLC (for industrial automation) digital output solution using a 2.5 A single high-side smart power switch based on the L6370Q

Data brief

Features

■Single-channel topology

■Galvanic isolation

■2.5 A output current

■9.5 V to 35 V supply voltage range

■Short-circuit, overload, and thermal protections

■Loss of ground and VS protections

■Fast demagnetization of inductive loads

■Open load, output short to VS detection

■Two diagnostic outputs

■ Output status LED driver

STEVAL-IFP020V1

■EMC immunity against burst, surge, and ESD

■RoHS compliant

Description

The STEVAL-IFP020V1 demonstration board is based on the L6370Q, a single-channel high-side driver chip intended for driving resistive, inductive or capacitive loads in an industrial environment. It provides an embedded fast demagnetization feature for inductive load switch-off.

The device evaluates load disconnection (during channel on-state), output short to VCC or GND, overtemperature, undervoltage of supply voltage, and provides feedback to a control unit.

Integrating an extensive set of electrical protections makes the application safe and reliable for use in harsh conditions.

The STEVAL-IFP020V1 demonstration board is an example of application design using the L6370Q. It is used to guide the designer in choosing external components for applications while providing an appropriate PCB design.

December 2011	Doc ID 022632 Rev 1	1/4
For further information contact your local STMicroelectronics sales office.		www.st.com

1

Schematic

-STEVAL

Figure 1.

STEVAL-IFP020V1 schematic

IFP020V1

CN1

V_Logic

CN5

Vs

L6370Q_Vs

TP1

Vs

CN3

V_Logic

1

2

1

1

INPUT

3

4

Earth

C3

W1

C1

2

5

6

C9

4n7

C8

5.08mm

C2

D1

ARK128V-A-2P

DIAG1

7

8

DIAG2

100uF

100nF

Vs

3kV

100nF

10A

100nF

SM15T36A

9

10

TP2

50V

50V

50V

50V

11

12

0603

0603

L6370Q_Vs

0603

13

14

R1

C4

MLW14G

OPT1

18K

4n7

L6370Q_GND

R2

0603

1

4

3kV

3.3V/5V,

INPUT

U1

5 6 7 8

470R

0603

TTL/CMOS

TP3

TP4

CN4

Doc

R3

Vs

Vs

Vs Vs

Compatible

2

3

IN+

33

IN+

OUT

1

OUTPUT

1

Signals

470R

0603

IN-

34

2

IN-

OUT

2

CN2

TLP281

C5

ID

OUT

10

11

0603 10nF

ARK128V-A-2P

1

2

RSC

22

OUT

022632

3

4

RSC

50V

ON-DELAY

4

5

6

DIAG1

R4

R5

R6

ON-DELAY

7

8

18K

C6

470R

470R

C7

INPUT

9

10

0603

0603

0603

180pF

680pF

V_Logic

11

12

0603 50V

0603 50V

28

DIAG1

Rev

13

14

V_Logic

29

GND

38

OUT-STAT

15

16

DIAG2

TAB

OUT-STATUS

17

18

1

19

20

R7

L6370Q

21

22

10K

OPT2

41

TAB

23

24

0603

1

R8

LED1

DIAG2

25

26

DIAG1

4

Vs

3K3 0603

GREEN

27

28

TP5

W2

0805

29

30

3

2

R9

V_Logic

2.54mm

31

32

3K3 0603

L6370Q_GND

1A

33

34

TLP281

MLW34G

R10

10K

OPT3

0603

1

R11

DIAG2

4

Vs

3K3 0603

TP6

R12

3

2

TLP281

3K3 0603

Earth

1

AM045319v1

CN6

2/4

Schematic