Data Sheet rev 0.2

IRCS2277S

www.irf.com

page

4/20

May 5

Board Connectors

Figure 1: BOTTOM and TOP image with connectors

Connection with the system controller

On board there is a 40 pins connector for the control signals. The current sense board uses 26 pins. The

remaining pins are for the sensing board (IRCS2277S) that can be connected on top of IRMD22381Q board.

Table 1: 40-pin connector J2 and J1

8

10

12

13

15

16

17

18

19

20

21

24

SYNC

27

28

35

36

37

38

39

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

40

7

9

11

14

15

16

17

18

19

20

22

SYNC

23

27

28

35

36

37

38

39

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

40

SYNC and POx logic inputs are 5V and 3.3 V compatible CMOS I/O ports. SYNC input must be a 50% duty-

cycle square wave that provides filter synchronization with PWM carrier. POx as an input is used for over

current reset when auto-reset function is disabled. As an opened drain output, POx is pull-up with a resistor

to 15V supply. OCx open drain output is also pulled-up to 15V supply. Both pull-up resistors can be removed

in order to use a different supply provided in the controller board. OCx pins are connected to a yellow led

(see Figure 2) indicating the overcurrent condition of the respective current sensor. This led will be disabled

when connecting OCx to a different pull-up.

J2

P12

P8

P4

J1